CN110103355A - Plastic waste material treatment water circulation system - Google Patents

Abstract

The invention discloses a plastic waste treatment water circulation system, comprising a first vibrating screen, a reaction device, a water treatment sedimentation tank, and an air flotation tank. The liquid output end of the first vibrating screen is connected to the reaction device, the liquid output end of the reaction device is connected to the water treatment sedimentation tank, the liquid output end of the water treatment sedimentation tank is connected to the air flotation tank, and the liquid output end of the air flotation tank is connected to a second water storage tank. The liquid circulation structure of the plastic waste treatment water circulation system is as follows: the liquid output ends of the first friction cleaning machine and the first vertical dehydrator are respectively connected to the input end of the first vibrating screen; the output end of the second water storage tank is connected to the liquid input end of the first separation sedimentation tank; the liquid output ends of the third screw conveyor, the fourth screw conveyor, the second vertical dehydrator and the third vertical dehydrator are respectively connected to the liquid input ends of the crusher, the first friction cleaning machine and the first vertical dehydrator.

Description

Plastic waste treatment water circulation system

technical field

The invention relates to a plastic waste treatment water circulation system.

Background technique

The main raw material of plastic waste is the shell of white home appliances and black home appliances. The plastic waste recycling and processing system in the prior art is in the form shown in Chinese patent 201420632798.7. The patent solution includes friction cleaning machine and dehydrator, among which: friction cleaning machine The plastics are fully rubbed against each other under the condition of water to clean the plastics by friction. During the friction cleaning process of the materials by the friction washer, the liquid used for washing the materials will be discharged. The dehydrator shakes the plastic to dehydrate the plastic. When the dehydrator dehydrates the material, the liquid originally attached to the material will be thrown out and then discharged.

In this patent solution (prior art), the liquid discharged from the friction cleaning machine and the dehydrator during the operation process is directly discharged and not recycled, resulting in relatively high water resource consumption in the plastic waste recovery and treatment system in the prior art. Large, not conducive to environmental protection and energy saving.

Contents of the invention

In order to overcome the deficiencies of the prior art, the object of the present invention is to provide a water circulation system for plastic waste treatment, which can reduce the water resource consumption of the waste recycling treatment system, thereby being beneficial to environmental protection and energy saving.

The purpose of the present invention adopts following technical scheme to realize:

The plastic waste treatment water circulation system includes a crusher, a first friction cleaning machine, a first vertical dehydrator, and a first separation and sedimentation tank. The solid output end of the crusher is connected to the first friction cleaning machine. The solid output end of a friction cleaning machine is connected with the first vertical dehydrator, the solid output end of the first vertical dehydrator is connected with the first separation sedimentation tank, and the first separation sedimentation tank is equipped with The output end of the first floating material and the output end of the first sinking material, the output end of the first floating material is connected with the third screw conveyor and the second vertical dehydrator in turn, and the output end of the first sinking material is connected in turn There is a fourth screw conveyor and a third vertical dehydrator. The plastic waste treatment water circulation system includes a first vibrating screen, a reaction device, a water treatment sedimentation tank, and an air flotation tank. The liquid output end of the first vibrating screen is connected to the The reaction device is connected, the liquid output end of the reaction device is connected with the water treatment sedimentation tank, the liquid output end of the water treatment sedimentation tank is connected with the air flotation tank, and the liquid output end of the air flotation tank is connected with the first Two water storage tanks, the liquid circulation structure of the plastic waste treatment water circulation system is as follows:

The respective liquid output ends of the first friction cleaning machine and the first vertical dehydrator are connected to the input end of the first vibrating screen;

The output end of the second water storage tank is connected to the liquid input end of the first separation and sedimentation tank;

The respective liquid output ends of the third screw conveyor, the fourth screw conveyor, the second vertical dehydrator and the third vertical dehydrator are connected to the crusher, the The respective liquid input ends of the first friction washer and the first vertical dehydrator are connected.

Specifically, the input end of the first vibrating screen is connected to a first belt cutting submersible pump, and the respective output ends of the first friction cleaning machine and the first vertical dehydrator are connected to the first belt cutting submersible pump. Pump connection.

Specifically, a first water storage tank is connected to the output end of the first vibrating screen, and a first vertical submersible sewage pump is connected between the first water storage tank and the reaction device.

Specifically, the plastic waste treatment water circulation system includes a mud storage tank, and the respective output ends of the water treatment sedimentation tank and the air flotation tank are connected to the mud storage tank.

Specifically, the output end of the mud storage tank is connected to a diaphragm pump, the output end of the diaphragm pump is connected to a plate and frame filter press, and the liquid output end of the plate and frame filter press is connected to the second storage tank. Water tank connection.

Specifically, the plastic waste treatment water circulation system includes a second vertical submersible sewage pump, the input end of the second vertical submersible sewage pump is connected to the second water storage tank, and the second vertical submersible sewage pump The output end is connected with the first separation and sedimentation tank.

Specifically, the plastic waste treatment water circulation system includes a second screw conveyor, the solid input end of the second screw conveyor is connected to the solid output end of the first vertical dehydrator, and the solid output end of the second screw conveyor The solid output end is connected with the solid input end of the first separation and sedimentation tank.

Specifically, the plastic waste treatment water circulation system includes a second belt cutting submersible pump, the third screw conveyor, the fourth screw conveyor, the second vertical dehydrator and the third vertical dehydrator The respective liquid output ends of the four machines are connected to the input end of the second belt cutting submersible pump, the crusher, the first friction cleaning machine, the first vertical dehydrator and the second The respective liquid input ends of the four screw conveyors are all connected with the second belt cutting submersible pump.

Specifically, the plastic waste treatment water circulation system includes a PAC dosing device and a PAM dosing device, and the respective output ends of the PAC dosing device and the PAM dosing device are connected to the reaction device.

Specifically, the liquid stored in the first separation and sedimentation tank is water.

Specifically, the plastic waste treatment water circulation system includes a first screw conveyor, the input end of the first belt cutting submersible pump is connected to the liquid output end of the first screw conveyor, and the first screw conveyor The solid output end is connected with the crusher, and the input end of the first screw conveyor is used to receive materials.

Specifically, the first vibrating screen is a first circular vibrating screen.

Specifically, the water treatment sedimentation tank is an inclined plate sedimentation tank.

Compared with the prior art, the beneficial effects of the present invention are:

The respective liquid output ends of the first friction cleaning machine and the first vertical dehydrator are connected to the input end of the first vibrating screen. The output end of the second water storage tank is connected with the liquid input end of the first separation and sedimentation tank. The liquid output ends of the third screw conveyor, the fourth screw conveyor, the second vertical dehydrator and the third vertical dehydrator are connected to the crusher, the first friction cleaner and the first vertical dehydrator. The respective liquid input ports of the three are connected.

The liquid discharged after the first friction cleaning machine frictionally cleans the material, and the liquid discharged from the first vertical dehydrator dehydrating the material are sent to the first vibrating screen, and the first vibrating screen filters the liquid and removes impurities. , the liquid is input to the reaction device for further treatment, so that the impurities in the liquid are further precipitated and separated to form clean water, which enters the second water storage tank for storage. The output end of the second water storage tank is connected with the liquid input end of the first separation and sedimentation tank for supplementing the liquid stored in the first separation and sedimentation tank.

The liquids discharged from the third screw conveyor, the fourth screw conveyor, the second vertical dehydrator and the third vertical dehydrator are all derived from the liquid discharged from the first separation and sedimentation tank at the same time. The liquids discharged from the above four are sent to the crusher, the first friction cleaning machine and the first vertical dehydrator for preliminary cleaning of the materials entering the plastic waste treatment system.

In this way, the sewage after the materials are cleaned by the crusher, the first friction cleaner and the first vertical dewatering machine is separated and precipitated after being filtered and impurity removed to form clean water, which is then transported to the first separation and sedimentation tank for use For material sorting. After the first separation and sedimentation tank is discharged, the liquid discharged from the third screw conveyor, the fourth screw conveyor, the second vertical dehydrator and the third vertical dehydrator is re-input into the crusher, the first A friction cleaning machine and a first vertical dehydrator for cleaning materials.

The sewage discharged from the crusher, the first friction cleaning machine and the first vertical dehydrator is transported to the first vibrating screen, reaction device, etc. for impurity removal and purification to form clean water. Then, the clean water is transported to the first separation and sedimentation tank for material separation. The first separation and sedimentation tank is sorted and discharged to the third screw conveyor, the fourth screw conveyor, the second vertical dehydrator and the third vertical dehydrator, the third screw conveyor, the fourth screw conveyor, the The liquid discharged from the second vertical dehydrator and the third vertical dehydrator is "secondary clean water". It is transported to the crusher, the first friction cleaning machine and the first vertical dehydrator to clean the materials that first enter the plastic waste treatment system. The plastic waste treatment water circulation system of the present invention realizes the circulation of the three water clean states of sewage, clean water and "secondary clean water", so that the water application of the water circulation system forms a self-circulation, thereby reducing the discharge of sewage and realizing environmental protection and energy saving.

Description of drawings

Fig. 1 is the overall schematic diagram of the plastic waste treatment system;

Fig. 2 is a partial view of part A of the plastic waste treatment system;

Fig. 3 is a partial view of part B of the plastic waste treatment system;

Fig. 4 is a partial view of part C of the plastic waste treatment system;

Fig. 5 is a partial view of part D of the plastic waste treatment system;

Figure 6 is a top view of the plastic waste treatment system;

7 is a schematic diagram of an electrostatic sorting system in the plastic waste treatment system.

In the figure: 1. Crusher; 21. The first separation sedimentation tank; 22. The second separation sedimentation tank; 31. The first friction cleaning machine; 41. The first vertical dehydrator; 42. The second vertical dehydrator; 43. The third vertical dehydrator; 44. The fourth vertical dehydrator; 45. The fifth vertical dehydrator; 46. The sixth vertical dehydrator; 47. The seventh vertical dehydrator; 51. The first silica gel Removal machine; 52, the second silica gel removal machine; 53, the third silica gel removal machine; 61, the first heating mixer; 62, the second heating mixer; 71, the first class A sorting machine; 72, the second class A Selection machine; 701, PP/PE primary distribution tank; 702, ABS primary distribution tank; 703, PS primary distribution tank; 73, the first class B sorting machine; 731, PA distribution tank; 732, ABS secondary Fractional material trough; 733, the first circulating material trough; 74, the first circular conveying mechanism; 75, the second class B sorting machine; 751, PP/PE secondary material trough; 752, PS secondary material Groove; 753, the second circulation distribution tank; 76, the first class C sorting machine; 761, the PS terminal distribution tank; 762, the third circulation distribution tank; 763, the fourth circulation distribution tank; 77, the first Second circulation conveying mechanism; 81, the third screw conveyor; 82, the fourth screw conveyor; 83, the seventh screw conveyor; 84, the eighth screw conveyor; 85, the second screw conveyor; 86, the sixth screw conveyor Conveyor; 87, the first screw conveyor; 88, the fifth screw conveyor; 91, the second Z-type winnowing machine; 92, the first Z-type winnowing machine; 101, the first clean water pool; 102, the second Clear water pool; 111, the first storage bin; 112, the second storage bin.

Detailed ways

Below, the present invention will be further described in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of not conflicting, the various embodiments described below or the technical features can be combined arbitrarily to form new embodiments. .

As shown in Figures 1 to 5, the plastic waste treatment system includes a crusher 1, a first separation and sedimentation tank 21, an electrostatic separation system, and a second separation and sedimentation tank 22, wherein:

Crusher 1 is used to crush plastic waste. Specifically, the plastic waste to be sorted comes from the plastic shells of electrical appliances such as white goods and black goods, such as the plastic shells of computer monitors and washing machines. The plastic wastes to be sorted are The ingredients mainly include PA, ABS, PS, PP and PE. Crusher 1 is used to crush the plastic casing to form plastic particles, small blocks or flakes with a size of 15mm-25mm. The output end of the crusher 1 is connected to the first separation and sedimentation tank 21 , and the crushed plastic waste is transported to the first separation and sedimentation tank 21 .

The first separation and sedimentation tank 21 uses the liquid stored in it to perform water separation on the crushed plastic waste. Specifically, the liquid stored in the first separation and sedimentation tank 21 is clean water, and "clean water" in this application specifically refers to the The density of water is 1 or close to 1, and does not specifically refer to the "clearness and cleanliness" of the water. The first separation and sedimentation tank 21 is provided with a first floating material output end and a first bottom material output end. Under the buoyancy of the clean water stored in the first separation and sedimentation tank 21, the main components are PE (density 0.95) and/or PP (density 0.92) floating on the water surface of the first separation and sedimentation tank 21, and the remaining plastic particles Shen. Therefore, the main component of the material output from the first floating material output end is PE and/or PP. The output end of the first sinking bottom material is connected with the electrostatic separation system. Since the first separation and sedimentation tank 21 does not float out all the materials containing PE and/or PP in the material during the separation process, the first sinking bottom material The material is a mixture of plastics containing PA, ABS, PS, PP and PE.

The electrostatic separation system is equipped with an ABS output terminal and a PS output terminal. The main component of the material output from the ABS output terminal is ABS, and the main component of the material output from the PS output terminal is PS. The PS output end is connected to the second separation and sedimentation tank 22, and the second separation and sedimentation tank 22 further sorts the received materials, that is, the second separation and sedimentation tank 22 uses the liquid stored in it to process the materials input through the PS output end. Water separation, specifically, the liquid stored in the second separation and sedimentation tank 22 is brine, the salinity of the brine is 5%-9%, and the salinity of the brine is 7% in this embodiment. The second separation and sedimentation tank 22 is provided with a second floating material output end and a second bottom material output end. The density of environmentally friendly PS is lower than that of the brine, and the density of non-environmental PS is higher than that of the brine. Therefore, the main component of the material output from the second floating material output end is environmentally friendly PS, and the main component of the material output from the second sinking material output end It is non-environmental protection PS.

Specifically, a first friction cleaning machine 31 and a first vertical dehydrator 41 are connected between the crusher 1 and the first separation and sedimentation tank 21, wherein:

The input end of the first friction cleaning machine 31 is connected with the output end of the crusher 1, and the friction cleaning machine is used for cleaning materials. The material is used to generate friction between the stirring plate and the material, and between the material and the material, so as to play the role of cleaning the material.

The solid output end of the first friction cleaning machine 31 is connected with the input end of the first vertical dehydrator 41 . The vertical dehydrator is used to dehydrate the material. The principle is: after the material enters the vertical dehydrator, it is pushed and stirred by the helical blade of the main shaft, and the material is rubbed inside the screen, so that some impurities and dirt (such as small sand and gravel and Fine materials) are separated by friction, and then thrown out through the screen holes under the action of water and centrifugal force, and the remaining materials to be processed are discharged at the discharge port, and the dehydration efficiency of the remaining materials to be processed is not less than 98%. The solid output end of the first vertical dehydrator 41 is connected with the input end of the first separation and sedimentation tank 21 . Specifically, the input end of the crusher 1 is provided with a first screw conveyor 87 . A second screw conveyor 85 is provided between the first vertical dehydrator 41 and the first separation and sedimentation tank 21 .

Specifically, the output end of the first floating material is sequentially connected with a third screw conveyor 81 and a second vertical dewatering machine 42, and the second vertical dehydrating machine 42 is used to dehydrate the first floating material. Preferably, the output end of the second vertical dehydrator 42 is connected with a first Z-type air separator 92, and the first Z-type air separator 92 is used to remove impurities such as dust and labels in the first floating material.

Specifically, a fourth screw conveyor 82 and a third vertical dehydrator 43 are sequentially connected to the first bottom material output end. The third vertical dehydrator 43 is used to dehydrate the first bottom material. A first heating agitator 61 is connected between the output end of the third vertical dehydrator 43 and the electrostatic separation system. The first heating agitator 61 is used to heat the first bottom material to dry the first bottom material, so that the first bottom material can better triboelectrically generate electricity in the subsequent electrostatic separation process. Preferably, a first silica gel remover 51 is connected between the output end of the third vertical dehydrator 43 and the first heating agitator 61, and the first silica gel remover 51 is used to remove silica gel impurities in the first bottom material. As further preferably, a second Z-type winnowing machine 91 is connected between the first silica gel remover 51 and the third vertical dehydrator 43, and the second Z-type winnowing machine 91 is used to remove dust in the first bottom material and labels and other impurities. As a further preference, the output end of the first heating agitator 61 is connected with a second heating agitator 62, and the second heating agitator 62 is used in conjunction with the first heating agitator 61, that is, the first heating agitator 61 preheats the material first, and the second heating agitator Stirrer 62 further heats the material, so that the material is more fully and thoroughly dried, so that it can be rubbed in the sorter in the subsequent electrostatic separation system to generate electric charge (in Fig. 6, due to the first heating stirrer 61 and the second heating mixer 62 are arranged vertically, so only one heating mixer is shown in Fig. 6). The output end of the second heating mixer 62 is connected with the fifth screw conveyor 88, and the output end of the fifth screw conveyor 88 is connected with the input end of the electrostatic separation system. In this implementation, a first storage bin 111 is connected between the second Z-type winnowing machine 91 and the first silica gel removal machine 51, and the first storage bin 111 is used for temporarily storing materials, and the first storage bin 111 can be After a sufficient amount of material is temporarily stored, the material is then transported to the first silica gel removal machine 51 connected thereto, so that the subsequent electrostatic separation process can be continuously and effectively carried out.

With reference to Fig. 4, Fig. 6 and Fig. 7, the electrostatic separation system includes a first Class A sorter 71, a second Class A sorter 72, the first Class A sorter 71 and the second Class A sorter 72 The respective inputs are connected to the outputs of the fifth screw conveyor 88 . It should be noted that the specific parameters such as "electrode polarity" and "electric field strength" of each separator in the electrostatic separation system are different, and can be set according to the plastic components expected to be separated by the separator Of course, it is expected that a certain plastic component obtained by sorting refers to "enrichment of this component", rather than being absolutely 100% composed of this component.

Both the first Class A sorting machine 71 and the second Class A sorting machine 72 are equipped with three material distribution tanks, which are PP/PE primary material distribution tank 701 , ABS primary material distribution tank 702 and PS primary material distribution tank 703 . The PP/PE primary distribution tank 701 is used to collect plastic waste whose main component is PP and/or PE. The PP/PE primary distribution tank 701 passes through the discharge conveying mechanism (the discharge conveying mechanism is an external device, independent of sorting Machine, the same below) will output the collected materials to the electrostatic separation system (along the direction A1 in Figure 7), and collect them at the PP/PE first collection place 781. The ABS primary distribution tank 702 is used to collect plastic waste whose main component is ABS. The PS primary distribution tank 703 is used to collect plastic waste whose main component is PS.

Specifically, the electrostatic separation system includes a first Class B sorter 73, and the ABS primary distribution tank 702 is connected to the input end of the first Class B sorter 73 through a discharge conveying mechanism. The ABS primary sorting chute 702 of the first Class A sorting machine 71 and the second Class A sorting machine 72 transports the plastic waste mainly composed of ABS to the first Class B sorting machine 73 (along the Direction A2) in Figure 7).

The first Class B sorter 73 is provided with a PA distribution tank 731 , an ABS secondary distribution tank 732 and a first circulation distribution tank 733 . The PA distribution tank 731 is used to collect the plastic waste whose main component is PA, and the PA distribution tank 731 outputs the collected materials to the electrostatic separation system through the discharge conveying mechanism, and collects them at the PA collection place 782 (along Fig. 7 direction B1).

The ABS secondary distribution tank 732 is used to collect plastic waste whose main component is ABS. The ABS secondary distribution tank 732 outputs the collected materials to the electrostatic separation system through the discharge conveying mechanism, and is further transported to the second silica gel for removal. Machine 52 (along direction B2 among Fig. 7), the second silica gel removing machine 52 is used for removing the silica gel type impurity in the plastic waste that main component is ABS. The first circulation distribution tank 733 is used to collect the rest of the plastic waste output from the first Class B sorter 73 .

The electrostatic separation system is provided with a first circulation delivery mechanism 74, and the first circulation distribution tank 733 is connected with the first circulation delivery mechanism 74 by a discharge delivery mechanism (the material flow direction of the first circulation distribution tank 733 is discharged along the direction shown in Fig. 7 direction B3). The output end (at M in FIG. 7 ) of the first circular conveying mechanism 74 is connected to the respective input ends of the first Class A sorter 71 and the second Class A sorter 72 . It should be noted that the figure is only schematically shown, and the connection state between the output end of the first circular conveying mechanism 74 and the respective input ends of the first Class A sorting machine 71 and the second Class A sorting machine 72 is not actually shown.

Specifically, the electrostatic separation system includes a second Class B sorter 75 and a first Class C sorter 76 . The PS primary distribution tank 703 is connected to the input end of the second Class B sorter 75 (along the direction A1 in FIG. 7 ) through the discharge conveying mechanism. The second Class B sorter 75 is provided with a PP/PE secondary material distribution tank 751 , a PS secondary material distribution tank 752 and a second circulation material distribution tank 753 . The PP/PE secondary distribution tank 751 is used to collect plastic waste whose main component is PE and/or PP. The PP/PE secondary distribution tank 751 outputs the collected materials to the electrostatic separation system through the discharge conveying mechanism. And it is collected at the second PP/PE collecting place 783 (the flow direction of the material discharged from the PP/PE secondary distribution tank 751 is direction C1 in FIG. 7 ). The PS secondary distributing tank 752 is used to collect the plastic waste whose main component is PS, and the PS secondary distributing tank 752 outputs the collected materials to the first Class C sorting machine 76 (PS secondary distributing machine 76) through the discharge conveying mechanism. The flow direction of the material discharged from the trough 752 is shown as direction C2 in FIG. 7 . The second circulation distribution tank 753 is used to collect the rest of the plastic waste output from the second Class B sorter 75 . The second circulation distribution tank 753 is connected with the first circulation transmission mechanism 74 through the discharge conveying mechanism (the flow direction of the material discharged from the second circulation distribution tank 753 is shown as direction C3 in FIG. 7 ).

The first Class C separator 76 is provided with a PS terminal distribution tank 761 , a third circulation distribution tank 762 and a fourth circulation distribution tank 763 . The PS terminal distributing tank 761 is used to collect the plastic waste whose main component is PS. The PS terminal distributing tank 761 outputs the collected materials to the electrostatic separation system through the discharge conveying mechanism, and then inputs them to the third silica gel removal machine 53 Inside (the flow direction of the material discharged from the PS terminal distribution tank 761 is as shown in the direction D1 in Figure 7). The third circulating material distribution tank 762 is connected with the first circular conveying mechanism 74 through the discharge conveying mechanism (the flow direction of the material discharged from the third circulating material distributing tank 762 is shown as direction D2 in FIG. 7 ).

The electrostatic separation system includes a second circulation conveying mechanism 77, the output end of the second circulation conveying mechanism 77 (at N in Fig. 7 ) and the respective input ends of the first class A sorting machine 71 and the second class A sorting machine 72 connection, it should be noted that the figure only shows a schematic diagram, and does not actually show the connection status of the output end of the second circulation conveying mechanism 77 and the respective input ends of the first class A sorting machine 71 and the second class A sorting machine 72 . The fourth circulating material distribution tank 763 is connected with the second circulating conveying mechanism 77 through the discharge conveying mechanism (the flow direction of the material discharged from the fourth circulating material distributing tank 763 is shown as direction D3 in FIG. 7 ).

The electrostatic separation system has a class A sorter, a class B sorter and a class C sorter. Class A sorting machine is used for primary selection, and part of the miscellaneous materials (PP/PE) with high enrichment degree is discharged, and the rest of the miscellaneous materials enter the first Class B sorting machine 73 and the second Class B sorting machine 75 respectively. Further sorting. Then, the first Class B sorter 73 discharges part of the miscellaneous material (PA) with a higher degree of enrichment, and the second Class B sorter 75 discharges part of the miscellaneous material (PP/PE) with a higher degree of enrichment. Then, the second class-B sorter 75 inputs part of the remaining miscellaneous materials to the first class-C classifier 76, and the first class-C classifier 76 discharges part of the miscellaneous materials (PS) with higher enrichment degree.

After the materials are sorted by three levels, the corresponding miscellaneous materials can be sorted out in the corresponding sorting machine in a more targeted manner.

In addition, the electrostatic separation system includes a first circulation conveying mechanism 74 and a second circulation conveying mechanism 77 . Both the first circulation distribution tank 733 and the second circulation distribution tank 753 are connected to the first circulation delivery mechanism 74 through a discharge output mechanism. The fourth circulating material distribution tank 763 is connected with the second circulating conveying mechanism 77 through a discharge conveying mechanism. Thereby, the material that is not screened out by the specific material in the first Class B sorter 73 and the second Class B sorter 75 can be transported to the Class A sorter again by the first circulation conveying mechanism 74, and in the same way, The materials not screened out by the specific materials in the first class C sorting machine 76 can be transported to the class A sorting machine again through the second circulation conveying mechanism 77 to be sorted again. Through circular sorting, the sorting accuracy is improved.

It should be noted that the first Class A sorting machine 71, the second Class A sorting machine 72, the first Class B sorting machine 73, the second Class B sorting machine 75 and the first Class C sorting machine 76 are all There is a friction channel, a conveyor belt and a sorting electrode. There is a rotating shaft in the friction channel. The rotating shaft is equipped with a number of stirring blades. The stirring blades are used to stir the materials so that the materials rub against each other and are charged. into the conveyor belt, and the sorting electrode is set at the output of the conveyor belt.

It should be noted that the above-mentioned discharge conveying mechanism is a vibrating conveyor. The first circulation conveying mechanism 74 is a vibrating conveyor. The second circulation conveying mechanism 77 is a vibrating conveyor.

The output end of the third silica gel removal machine 53 (the input material is plastic waste whose main component is PS) is connected with a second storage bin 112, and the second storage bin 112 collects plastic waste (including environmentally friendly PS) whose main component is PS. and non-environmentally friendly PS). The output end of the second storage bin 112 is connected with the sixth screw conveyor 86 , and the output end of the sixth screw conveyor 86 is connected with the second separation and sedimentation tank 22 .

The plastic waste treatment system includes a first plastic waste treatment water circulation system, and the first plastic waste treatment water circulation system includes a crusher 1 , a first friction cleaning machine 31 , a first vertical dehydrator 41 , and a first separation and sedimentation tank 21 . The solid output end of the crusher 1 is connected with the first friction cleaning machine 31, the solid output end of the first friction cleaning machine 31 is connected with the first vertical dehydrator 41, and the solid output end of the first vertical dehydrator 41 is connected with the first The separation and sedimentation tank 21 is connected, and the first separation and sedimentation tank 21 is provided with a first floating material output end and a first sinking material output end, and the first floating material output end is connected with a third screw conveyor 81, a second vertical dehydration machine 42, the first sinking material output end is connected with the fourth screw conveyor 82 and the third vertical dehydrator 43 in sequence. The first plastic waste treatment water circulation system includes a first vibrating screen, a reaction device, a water treatment sedimentation tank, and an air flotation tank. The liquid output end of the first vibrating screen is connected with the reaction device, and the liquid output end of the reaction device is connected with the water treatment sedimentation tank. The liquid output end of the water treatment sedimentation tank is connected with the air flotation tank, and the liquid output end of the air flotation tank is connected with a second water storage tank. The liquid circulation structure of the first plastic waste treatment water circulation system is as follows:

The respective liquid output ends of the first friction cleaning machine 31 and the first vertical dehydrator 41 are connected to the input end of the first vibrating screen;

The output end of the second water storage tank is connected with the liquid input end of the first separation sedimentation tank 21;

The respective liquid output ends of the third screw conveyor 81, the fourth screw conveyor 82, the second vertical dehydrator 42 and the third vertical dehydrator 43 are connected to the crusher 1, the first friction cleaning machine 31 and the third vertical dehydrator 43. The respective liquid input ends of the three first vertical dehydrators 41 are connected.

Specifically, the input end of the first vibrating screen is connected to the first belt cutting submersible pump, and the respective output ends of the first friction cleaning machine 31 and the first vertical dehydrator 41 are connected to the first belt cutting submersible pump.

Specifically, a first water storage tank is connected to the output end of the first vibrating screen, and a first vertical submersible sewage pump is connected between the first water storage tank and the reaction device. Specifically, the first plastic waste treatment water circulation system includes a PAC dosing device and a PAM dosing device, the respective output ends of the PAC dosing device and the PAM dosing device are connected to the reaction device, and both PAM and PAC are flocculants. In the treatment sedimentation tank, the flocs formed by PAM and PAC make the colloids and insoluble particles in the sewage adhere to it, so as to agglomerate the colloids and insoluble particles.

Specifically, the first plastic waste treatment water circulation system includes a mud storage tank, and the respective output ends of the water treatment sedimentation tank and the air flotation tank are connected to the mud storage tank. After the liquid in the water treatment sedimentation tank is transported to the air flotation tank, the bottom of the air flotation tank releases tiny bubbles, and the bubbles attach to the above-mentioned flocs (the flocs are adhered to colloids and insoluble particles), making the flocs buoyant Increase and float up to the pool surface of the air flotation pool. Then, the flocs that float up to the surface of the air flotation tank can be transferred to the mud storage tank to complete the removal of colloids and insoluble particles in the sewage. The remaining liquid in the air flotation tank is relatively clean and can be transported to the first separation and sedimentation tank 21 for sorting.

Specifically, the output end of the mud storage tank is connected to a diaphragm pump, the output end of the diaphragm pump is connected to a plate and frame filter press, and the liquid output end of the plate and frame filter press is connected to the second water storage tank.

Specifically, the first plastic waste treatment water circulation system includes a second vertical submersible sewage pump, the input end of the second vertical submersible sewage pump is connected to the second water storage tank, and the output end of the second vertical submersible sewage pump is connected to the first The separation sedimentation tank 21 is connected.

Specifically, the first plastic waste treatment water circulation system includes a second screw conveyor 85, the solid input end of the second screw conveyor 85 is connected to the solid output end of the first vertical dehydrator 41, and the solid output end of the second screw conveyor 85 The end is connected with the solid input end of the first separation and sedimentation tank 21.

Specifically, the first plastic waste treatment water circulation system includes the second belt cutting submersible pump, the third screw conveyor 81, the fourth screw conveyor 82, the second vertical dehydrator 42 and the third vertical dehydrator 43. The respective liquid output ends are connected with the input ends of the second submersible pump with cutting. The respective liquid input ends of the crusher 1 , the first friction cleaning machine 31 , the first vertical dehydrator 41 and the second screw conveyor 85 are all connected to the second belt cutting submersible pump.

Specifically, the first plastic waste treatment water circulation system includes a first screw conveyor 87, the input end of the first belt cutting submersible pump is connected to the liquid output end of the first screw conveyor 87, and the solid output end of the first screw conveyor 87 Connected with the crusher 1, the input end of the first screw conveyor 87 is used to receive materials.

Specifically, the first vibrating screen is a first circular vibrating screen.

Specifically, the water treatment sedimentation tank is an inclined plate sedimentation tank.

The liquid discharged after the first friction cleaning machine 31 frictionally cleans the material, and the liquid discharged from the dehydration of the material by the first vertical dehydrator 41 are all sent to the first vibrating screen, and the first vibrating screen filters and removes the liquid. After impurity, the liquid is input to the reaction device for further treatment, so that the impurities in the liquid are further precipitated and separated to form clean water, which enters the second water storage tank for storage. The output end of the second water storage tank is connected with the liquid input end of the first separation and sedimentation tank 21 for supplementing the liquid stored in the first separation and sedimentation tank 21 .

The liquids discharged from the third screw conveyor 81, the fourth screw conveyor 82, the second vertical dehydrator 42 and the third vertical dehydrator 43 are all derived from the discharge from the first separation and sedimentation tank 21. The liquid discharged at the same time, the liquid discharged by each of the above four is sent to the crusher 1, the first friction cleaning machine 31 and the first vertical dehydrator 41 for preliminary cleaning of the materials entering the plastic waste treatment system.

In this way, after the crusher 1, the first friction cleaning machine 31 and the first vertical dehydrator 41 clean the materials, the sewage is separated and precipitated after filtering and removing impurities to form clean water, which is then transported to the first separation and sedimentation tank 21, for material sorting. After the first separation and sedimentation tank 21 is discharged, the liquid discharged from the third screw conveyor 81, the fourth screw conveyor 82, the second vertical dehydrator 42 and the third vertical dehydrator 43 is re-input To the crusher 1, the first friction cleaning machine 31 and the first vertical dehydrator 41 to clean the materials.

The sewage discharged from the crusher 1, the first friction cleaning machine 31 and the first vertical dehydrator 41 is transported to the first vibrating screen, reaction device, etc. for removal of impurities and purification to form clean water. Then, the clear water is transported to the first separation and sedimentation tank 21 for material separation. The first separation and sedimentation tank 21 is sorted and discharged to the third screw conveyor 81, the fourth screw conveyor 82, the second vertical dehydrator 42 and the third vertical dehydrator 43, the third screw conveyor 81, the The liquid discharged when the four-screw conveyor 82, the second vertical dehydrator 42 and the third vertical dehydrator 43 work is "secondary clean water", and the cleanliness of "secondary clean water" is higher than that of the clear water in the first separation and sedimentation tank 21. The cleanliness is low, so the "secondary clean water" is sent to the crusher 1, the first friction cleaning machine 31 and the first vertical dehydrator 41 to clean the materials that first enter the plastic waste treatment system. The plastic waste treatment water circulation system of the present invention realizes the circulation of the three water clean states of sewage, clean water and "secondary clean water", so that the water application of the water circulation system forms a self-circulation, thereby reducing the discharge of sewage and realizing environmental protection and energy saving.

The plastic waste treatment system includes a second plastic waste treatment water circulation system, the second plastic waste treatment water circulation system includes a second separation and sedimentation tank 22, and the second separation and sedimentation tank 22 is provided with a second floating material output end and a second sedimentation material output end . The second floating material output end is connected to the seventh screw conveyor 83 and the fourth vertical dehydrator 44 in sequence. The second bottom material output end is connected to the eighth screw conveyor 84 and the fifth vertical dehydrator 45 in sequence. The second plastic waste treatment water circulation system includes a second vibrating screen and a third water storage tank. The liquid output end of the second vibrating screen is connected to the third water storage tank. The liquid circulation structure of the second plastic waste treatment water circulation system is as follows:

The liquid output ends of the seventh screw conveyor 83, the fourth vertical dehydrator 44, the eighth screw conveyor 84 and the fifth vertical dehydrator 45 are all connected to the second vibrating screen;

The third water storage tank is connected with the liquid input end of the second separation and sedimentation tank 22 .

Specifically, the second plastic waste treatment water circulation system includes a third belt cutting submersible pump, and the output end of the third belt cutting submersible pump is connected to the second vibrating screen. The liquid output ends of the seventh screw conveyor 83 , the fourth vertical dehydrator 44 , the eighth screw conveyor 84 and the fifth vertical dehydrator 45 are all connected to the third belt cutting submersible pump.

Specifically, the second plastic waste treatment water circulation system includes a third vertical submersible sewage pump, the output end of the third water storage tank is connected to the third vertical submersible sewage pump, and the output end of the third vertical submersible sewage pump is connected to the second The liquid input end of separation sedimentation tank 22 is connected.

Specifically, the second plastic waste treatment water circulation system includes a first clean water tank 101, a sixth vertical dehydrator 46, the solid output end of the fourth vertical dehydrator 44 is connected to the first clean water tank 101, and the first clean water tank 101 The solid output end is connected with the sixth vertical dehydrator 46 .

Specifically, the second plastic waste treatment water circulation system includes a third vibrating screen, and the respective liquid output ends of the first clear water tank 101 and the sixth vertical dehydrator 46 are connected to the third vibrating screen.

Specifically, the second plastic waste treatment water circulation system includes a fourth belt cutting submersible pump. The respective liquid output ends of the first clear water tank 101 and the sixth vertical dehydrator 46 are connected to the fourth belt cutting submersible pump. The output end of the submersible pump is connected with the third vibrating screen.

Specifically, the second plastic waste treatment water circulation system includes a fourth water storage tank, the input end of the fourth water storage tank is connected to the liquid output end of the third vibrating screen, and the output end of the fourth water storage tank is connected to the first clear water tank 101 connect.

Specifically, the second plastic waste treatment water circulation system includes a fourth vertical submersible sewage pump, the output end of the fourth water storage tank is connected to the fourth vertical submersible sewage pump, and the output end of the fourth vertical submersible sewage pump is connected to the first Clean water pool 101 connection.

Specifically, the second plastic waste treatment water circulation system includes a second clean water tank 102 and a seventh vertical dehydrator 47 . The solid output end of the fifth vertical dehydrator 45 is connected to the second clean water tank 102 , and the solid output end of the second clean water tank 102 is connected to the seventh vertical dehydrator 47 .

Specifically, the respective liquid output ends of the second clean water tank 102 and the seventh vertical dehydrator 47 are connected to the third vibrating screen.

Specifically, the second plastic waste treatment water circulation system includes a fifth belt cutting submersible pump, the liquid output ends of the second clear water tank 102 and the seventh vertical dehydrator 47 are connected to the fifth belt cutting submersible pump, and the fifth belt cutting submersible pump The output end of the submersible pump is connected with the third vibrating screen.

Specifically, the input end of the fourth water storage tank is connected to the liquid output end of the third vibrating screen, and the output end of the fourth water storage tank is connected to the second clear water tank 102 .

Specifically, the output end of the fourth water storage tank is connected to the fourth vertical submersible sewage pump, and the output end of the fourth vertical submersible sewage pump is connected to the second clean water tank 102 .

Specifically, the second vibrating screen is a second circular vibrating screen.

The working principle of the second plastic waste treatment water circulation system: the liquid output ends of the seventh screw conveyor 83, the fourth vertical dehydrator 44, the eighth screw conveyor 84 and the fifth vertical dehydrator 45 are all connected to each other. The second shaker is connected. The third water storage tank is connected with the liquid input end of the second separation and sedimentation tank 22 . The second separation and sedimentation tank 22 is sorted and discharged: the second floating material is transported to the fourth vertical dehydrator 44 through the seventh screw conveyor 83, and the second bottom material is transported to the fifth vertical dehydrator through the eighth screw conveyor 84. Type dehydrator 45. When the second floating material is input to the seventh screw conveyor 83 and the second sinking material is input to the eighth screw conveyor 84, part of the liquid stored in the second separation and sedimentation tank 22 will enter the seventh screw conveyor 83 and the eighth screw conveyor 84, so the seventh screw conveyor 83 and the eighth screw conveyor 84 will discharge liquid during the process of conveying materials. When the fourth vertical dehydrator 44 and the fifth vertical dehydrator 45 are shaking and dehydrating the materials, liquid is also discharged. The liquid discharged from the seventh screw conveyor 83 and the eighth screw conveyor 84 and the liquid discharged from the fourth vertical dehydrator 44 and the fifth vertical dehydrator 45 are all sent to the second vibrating screen for impurity removal , and then transported to the third storage tank for storage. After the liquid stored in the third water storage tank is supplemented with medicaments, it becomes the liquid that can be used by the second separation and sedimentation tank 22 , that is, brine. The liquid stored in the third water storage tank is transported to the second separation and sedimentation tank 22 for material separation.

In the plastic waste treatment water circulation system, the liquid produced during the working process of the seventh screw conveyor 83, the fourth vertical dehydrator 44, the eighth screw conveyor 84 and the fifth vertical dehydrator 45 is transported to the second vibration Sieve to remove impurities, and then be transported to the third storage tank for storage, so that the seventh screw conveyor 83 can be transported, the fourth vertical dehydrator 44, the eighth screw conveyor 84 and the fifth vertical dehydrator 45 The liquid generated during the working process is recycled to avoid direct discharge, thereby reducing the waste of water resources. After adding chemicals to the third water storage tank, the liquid stored in the third water storage tank can be used by the second separation and sedimentation tank 22, thereby realizing water recycling and reducing the demand for new municipal water, thereby reducing water resource consumption , which is conducive to environmental protection and energy saving.

For the function or working principle of the above crusher, please refer to patent documents 201610641070.4, CN104971811B, CN206296027U, CN206296028U, CN106423466A;

For the function or working principle of the above friction cleaning machine, please refer to the patent documents CN108357021A, CN103418570A, CN205650554U;

For the function or working principle of the above separation and sedimentation tank, please refer to the patent documents CN207841832U, CN107718367A, CN207240602U, CN207240599U;

For the function or working principle of the above-mentioned vertical dehydrator, please refer to the patent document CN207065999U;

For the function or working principle of the above silica gel removal machine, please refer to the patent document CN201621262376;

For the function or working principle of the above heating mixer, please refer to the patent documents CN205980650U, CN204320143U, CN106288705A;

For the functions or working principles of the above-mentioned Class A sorting machines, Class B sorting machines, and Class C sorting machines, please refer to patent documents CN208004155U, CN1326381A, and CN202498038U;

For the function or working principle of the above-mentioned Z-type winnowing machine, you can refer to the patent documents CN203494791U, CN208466512U, CN106423865A, CN205914396U, CN203061434U;

For the function or working principle of the above-mentioned screw conveyor, reference may be made to patent documents CN207312679U, CN208070688U, and CN207450942U.

Patent documents disclose parts, elements, components or devices related to the invention, therefore, the structural relationship, positional relationship, force relationship, motion relationship, and energy relationship between parts, elements and components that are not mentioned herein , momentum relationship, etc. can be understood by referring to the above cited patent documents. The technical contents of the patent documents cited herein thus become part of the patent application documents. Where necessary, all published patent documents in the technical field to which the present invention relates can provide prior art references for this patent application.

The above-mentioned embodiment is only a preferred embodiment of the present invention, and cannot be used to limit the protection scope of the present invention. Any insubstantial changes and substitutions made by those skilled in the art on the basis of the present invention belong to the scope of the present invention. Scope of protection claimed.

Claims (13)

1. plastic waste materials handle water circulation system, it is characterised in that: including crusher, the first friction cleaning machine, first vertical de- Water dispenser, the first separating sedimentation basin, the solid output end of the crusher are connect with first friction cleaning machine, and described first rubs Wipe cleaning machine solid output end connect with first vertical dewaterer, the solid output end of first vertical dewaterer and First separating sedimentation basin connection, first separating sedimentation basin are equipped with first and swim to expect output end and first to sink to the bottom material defeated Outlet, described first, which swims, expects that output end is connected with third screw conveyor, the second vertical dewaterer in turn, and described first sinks to the bottom Material output end is connected with the 4th screw conveyor, third vertical dewaterer in turn, and the plastic waste materials handle water circulation system packet Include the first vibrating screen, reaction unit, sedimentation pond for water treatment, flotation tank, the fluid output port of first vibrating screen and described anti- Device is answered to connect, the fluid output port of the reaction unit is connect with the sedimentation pond for water treatment, the sedimentation pond for water treatment Fluid output port is connect with the flotation tank, and the fluid output port of the flotation tank is connected with the second water storage box, the waste plastic Material processing water circulation system liquid circulation structure therein is as follows: first friction cleaning machine, first vertical dewaterer Respective fluid output port is connect with the input terminal of first vibrating screen；

The output end of second water storage box is connect with the fluid input port of first separating sedimentation basin；

The third screw conveyor, the 4th screw conveyor, second vertical dewaterer and the third are vertical Dewaterer this respective fluid output port with the crusher, first friction cleaning machine and described first vertical The respective fluid input port connection of this three of dewaterer.

2. plastic waste materials according to claim 1 handle water circulation system, it is characterised in that: first vibrating screen it is defeated Enter end and is connected with first band cutting immersible pump, first friction cleaning machine, the respective output end of the first vertical dewaterer It is connect with first band cutting immersible pump.

3. plastic waste materials according to claim 1 handle water circulation system, it is characterised in that: first vibrating screen it is defeated Outlet is connected with the first water storage box, and the first vertical submersible sewage pump is connected between first water storage box and the reaction unit.

4. plastic waste materials according to claim 1 handle water circulation system, it is characterised in that: the plastic waste materials handle water The circulatory system includes storing mud sump, and the sedimentation pond for water treatment and the respective output end of the flotation tank connect with the storage mud sump It connects.

5. plastic waste materials according to claim 4 handle water circulation system, it is characterised in that: the output end for storing mud sump It is connected with diaphragm pump, the output end of the diaphragm pump is connected with plate and frame type filter-press, the liquid output of the plate and frame type filter-press End is connect with second water storage box.

6. plastic waste materials according to claim 1 handle water circulation system, it is characterised in that: the plastic waste materials handle water The circulatory system includes the second vertical submersible sewage pump, and the input terminal of the second vertical submersible sewage pump is connect with second water storage box, institute The output end for stating the second vertical submersible sewage pump is connect with first separating sedimentation basin.

7. plastic waste materials according to claim 1 handle water circulation system, it is characterised in that: the plastic waste materials handle water The circulatory system includes the second screw conveyor, the solid input terminal of second screw conveyor and first vertical dewaterer The connection of solid output end, the solid input terminal of the solid output end of second screw conveyor and first separating sedimentation basin Connection.

8. plastic waste materials according to claim 7 handle water circulation system, it is characterised in that: the plastic waste materials handle water The circulatory system includes that the second band cuts immersible pump, and the third screw conveyor, the 4th screw conveyor, described second stand Formula dewaterer and the third vertical dewaterer this respective fluid output port with the second band cutting immersible pump Input terminal connection, the crusher, first friction cleaning machine, first vertical dewaterer and second spiral The respective fluid input port of conveyer person is connect with the second band cutting immersible pump.

9. plastic waste materials according to claim 1 handle water circulation system, it is characterised in that: the plastic waste materials handle water The circulatory system includes PAC chemicals dosing plant and PAM chemicals dosing plant, and the PAC chemicals dosing plant and PAM chemicals dosing plant are respective defeated Outlet is connect with the reaction unit.

10. plastic waste materials according to claim 1 handle water circulation system, it is characterised in that: first precipitation and separation The liquid that pond is stored up is water.

11. plastic waste materials according to claim 2 handle water circulation system, it is characterised in that: the plastic waste materials processing Water circulation system includes the first screw conveyor, the input terminal and first screw conveyor of the first band cutting immersible pump Fluid output port connection, the solid output end of first screw conveyor connect with the crusher, first spiral The input terminal of conveyer is for receiving material.

12. plastic waste materials according to claim 1 handle water circulation system, it is characterised in that: first vibrating screen is First circular vibrating screen.

13. plastic waste materials according to claim 1 handle water circulation system, it is characterised in that: the sedimentation pond for water treatment For inclined-plate clarifying basin.