CN105481142A - Copper sheet grinding wastewater treatment and reuse system - Google Patents

Abstract

The invention discloses a copper sheet grinding wastewater treatment recycling system which comprises an electric control unit, a wastewater collecting pool, a reaction water tank, a concentrated water tank, a tubular microfiltration membrane device, a recycling water tank, a sludge concentration device, a filtrate tank and a filter membrane cleaning system, wherein the electric control unit is connected with the wastewater collecting pool; wherein, the wastewater collecting tank, the reaction water tank, the concentration water tank, the tubular microfiltration membrane device and the reuse water tank are sequentially connected according to the process flow; the filter membrane cleaning system comprises a first cleaning water tank, a second cleaning water tank, a third cleaning water tank and a cleaning water pump; therefore, the copper sheet grinding wastewater treatment and recycling system has the advantages of high automation degree, simplicity in operation, capability of controlling clearance operation according to needs, capability of adjusting the water production flow according to needs, less addition of water treatment agents, reliability in water filtration, high treatment and recycling efficiency, environmental friendliness, energy conservation, resource recycling and the like, and is suitable for popularization and application.

Description

Copper sheet grinding wastewater treatment and reuse system

technical field

The invention relates to the technology in the field of waste water treatment, in particular to a copper sheet grinding waste water treatment and reuse system.

Background technique

During the copper sheet grinding process, some copper powder will be produced. These copper powders will be taken away by water during the washing process to form grinding plate wastewater. The discharge of copper-containing wastewater will cause harm to the environment and cause waste of copper and water resources; In the existing technology, the treatment system for copper sheet grinding wastewater has low treatment efficiency, and it is difficult to effectively treat the standard. At the same time, in the treatment process, more flocculants and water treatment chemicals (such as PAM, PAC, etc.) need to be added. )Wait.

Therefore, a new technical solution needs to be developed to solve the above problems.

Contents of the invention

In view of this, the present invention aims at the deficiencies in the prior art, and its main purpose is to provide a copper sheet grinding wastewater treatment and recycling system, which has a high degree of automation, simple operation, and can control the gap operation on demand and can be adjusted on demand. There are many advantages such as the flow rate of produced water, less addition of water treatment chemicals, reliable filtered water quality, high treatment and reuse efficiency, environmental protection and energy saving, and resource reuse.

To achieve the above object, the present invention adopts the following technical solutions:

A system for treating and recycling copper sheet grinding wastewater, including an electric control unit, a wastewater collection tank, a reaction water tank, a concentration water tank, a tubular microfiltration membrane device, a reuse water tank, a sludge concentration device, a filtrate tank, and a filter membrane cleaning system; Among them, the wastewater collection tank, reaction water tank, concentrated water tank, tubular microfiltration membrane device, and reuse water tank are connected in sequence according to the process flow;

The water outlet of the wastewater collection tank is connected to the water inlet of the reaction water tank, the water outlet of the reaction water tank is connected to the water inlet of the concentrated water tank, the concentrated water tank has a water outlet and a wet sludge output, and the water outlet of the concentrated water tank is connected to the tubular microfiltration The water inlet end of the membrane device. The water outlet end of the tubular microfiltration membrane device includes a filtered water outlet end and a concentrated water outlet end. The filtered water outlet end of the tubular microfiltration membrane device is connected to the water inlet end of the reuse water tank. The concentrated water outlet end of the device is connected to the water inlet end of the aforementioned concentrated water tank;

The wet sludge output end of the concentrated water tank is connected to the sludge thickening device through the sludge pump, and the sludge thickening device has a sludge filter water output end and a concentrated sludge output end, and the sludge filter water output end is connected to the filtrate tank , the water outlet end of the filtrate tank is connected to the water inlet end of the aforementioned concentrated water tank through the filtrate pump;

The filter membrane cleaning system includes a first cleaning water tank, a second cleaning water tank, a third cleaning water tank and a cleaning water pump. The concentrated water outlet end of the device is also connected with a second cleaning outlet pipe, the water outlet sides of the first cleaning outlet pipe and the second cleaning outlet pipe are jointly connected to a common pipeline, and the shared pipeline has a cleaning wastewater discharge port, and the cleaning wastewater is discharged The water inlet of the first cleaning water tank is connected to the common pipeline through the first water inlet pipe, the water inlet of the second cleaning water tank is connected to the common pipeline through the second water inlet pipe, and the water inlet of the third cleaning water tank is connected to the common pipeline through the second water inlet pipe. Connect the common pipeline through the third water inlet pipe, the water outlet end of the first cleaning water tank is connected to the water inlet end of the cleaning water pump through the first water outlet pipe, and the water outlet end of the second cleaning water tank is connected to the water inlet end of the cleaning water pump through the second water outlet pipe , the water outlet end of the third cleaning water tank is connected to the water inlet end of the cleaning water pump through the third water outlet pipe, and the water outlet end of the cleaning water pump is connected to the water inlet end of the tubular microfiltration membrane device through the cleaning water inlet pipe; the concentrated water of the tubular microfiltration membrane device On the connecting pipe between the water outlet and the concentrated water tank, on the connecting pipe between the water outlet of the concentrated water tank and the water inlet of the tubular microfiltration membrane device, and between the filtered water outlet of the tubular microfiltration membrane device and the reuse water tank On the pipeline, on the cleaning water inlet pipe, on the first cleaning water outlet pipe, on the second cleaning water outlet pipe, on the first water inlet pipe, on the second water inlet pipe, on the third water inlet pipe, on the common pipe, on the first water outlet pipe, on the second water outlet pipe and on the third The outlet pipes are all provided with switches.

As a preferred solution, the water outlet of the cleaning water pump is also connected with a liquid medicine discharge pipe, and a discharge switch is arranged on the discharge pipe.

As a preferred solution, the water outlet of the wastewater collection tank is connected to the water inlet of the reaction water tank through a lift pump, and the water outlet of the reaction water tank is higher than the water inlet of the concentrated water tank.

As a preferred solution, the sludge thickening device is a sludge thickening tank or a filter press, and the sludge pump is a pneumatic diaphragm pump.

As a preferred solution, a liquid level gauge is provided in the concentrated water tank, and the information of the liquid level gauge is fed back to the aforementioned electric control unit; the water outlet end of the aforementioned concentrated water tank is connected to the water inlet end of the tubular microfiltration membrane device through a circulation pump, and the aforementioned The electric control unit controls the opening and closing of the circulation pump according to the information of the liquid level gauge.

As a preferred solution, the reaction water tank is connected with a lye dosing box and a PAC dosing box, and a liquid level gauge and a pH meter are arranged in the reaction water tank.

As a preferred solution, the reclaimed water tank is connected with an acid dosing tank, a liquid level gauge and a PH meter are arranged in the reclaimed water tank, a reclaimed water discharge pipe is connected to the reclaimed water tank, and the reclaimed water is discharged The pipe is connected to the return water pump.

Compared with the prior art, the present invention has obvious advantages and beneficial effects. Specifically, it can be seen from the above technical scheme that it is mainly through the electric control unit, waste water collection pool, reaction water tank, concentrated water tank, tubular microfiltration membrane device, The design and mutual cooperation of the reuse water tank, the sludge thickening device, the filtrate tank and the filter membrane cleaning system make the copper sheet grinding wastewater treatment and reuse system of the present invention have a high degree of automation, simple operation, and can control the gap operation as required. Adjusting the flow rate of produced water on demand, adding less water treatment chemicals, reliable filtered water quality, high treatment and recycling efficiency, environmental protection, energy saving and resource recycling, etc., are suitable for popularization and application.

In order to more clearly illustrate the structural features and functions of the present invention, the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

Description of drawings

Fig. 1 is a schematic structural connection diagram of an embodiment of the present invention.

Explanation of the accompanying drawings:

1. Wastewater collection pool 2. Reaction water tank

3. Concentrated water tank 4. Tubular microfiltration membrane device

5. Reuse water tank 6. Sludge thickening device

7. Filtrate tank 8. Lift pump

9. Circulation pump 10. Sludge pump

11. Filtrate pump 12. Cleaning water pump

13. The first cleaning water tank 14. The second cleaning water tank

15. The third cleaning water tank 16. Cleaning water inlet pipe

17. The first cleaning outlet pipe 18. The second cleaning outlet pipe

19. Shared pipeline 20. Cleaning waste water discharge port

21. The first water inlet pipe 22. The second water inlet pipe

23. The third water inlet pipe 24. The liquid medicine discharge pipe

25. Potion discharge switch 26. Recycled water discharge pipe

27. Reuse water pump 28. Liquid level gauge

29, PH meter 30, lye dosing box

31. PAC dosing box 32. Acid dosing box

33. The first water outlet pipe 34. The second water outlet pipe

35. The third outlet pipe.

detailed description

Please refer to shown in Fig. 1, it has shown the specific structure of the embodiment of the present invention, and it comprises electric control unit, waste water collection pool 1, reaction water tank 2, concentrated water tank 3, tubular microfiltration membrane device 4, reuse water tank 5. Sludge thickening device 6, filtrate tank 7 and membrane cleaning system.

Wherein, the waste water collection tank 1, the reaction water tank 2, the concentrated water tank 3, the tubular microfiltration membrane device 4, and the reuse water tank 5 are sequentially connected according to the process flow, and the water outlet end of the waste water collection tank 1 is connected to the water inlet end of the reaction water tank 2, and the reaction The water inlet end of the water tank 2 will be higher than the water outlet end of the waste water collection tank 1, and the water outlet end of the waste water collection tank 1 and the water inlet end of the reaction water tank 2 are connected by a lift pump 8, and the water outlet end of the reaction water tank 2 is connected to the concentrated water tank 3, the water outlet end of the reaction water tank 2 is higher than the water inlet end of the concentrated water tank 3, so that the water outlet of the reaction water tank 2 flows into the concentrated water tank 3 by gravity. Described reaction water tank 2 is connected with lye dosing box 30 and PAC dosing box 31 (PAC described here refers to polyaluminum chloride, also claims basic aluminum chloride, and it is usually used as water purifying agent or mixed Coagulant, it is a water-soluble inorganic high molecular polymer between AlCl3 and Al(OH)3, the general chemical formula is [Al2(OH)nCl6-n]m, where m represents the degree of polymerization, n represents neutrality of PAC products), the reaction water tank 2 is provided with a liquid level gauge 28 and a pH gauge 29.

The concentrated water tank 3 has a water outlet and a wet sludge output end, the water outlet of the concentrated water tank 3 is connected to the water inlet of the tubular microfiltration membrane device 4, the concentrated water tank 3 is provided with a liquid level gauge 28, and the liquid level gauge 28 The information is fed back to the aforementioned electric control unit; the outlet end of the aforementioned concentrated water tank 3 is connected to the water inlet end of the tubular microfiltration membrane device 4 through the circulation pump 9, and the aforementioned electric control unit controls the flow of the circulating pump 9 according to the information of the liquid level gauge 28 in the concentrated water tank 3 Opening and closing, the setting of the concentrated water tank 3 is mainly used to ensure that the fixed concentration of water entering the tubular microfiltration membrane device 4 is between 3% and 5%; the water outlet of the tubular microfiltration membrane device 4 includes a filtered water outlet end and the concentrated water outlet end, the water outlet end of the tubular microfiltration membrane device 4 is connected to the water inlet end of the reuse water tank 5, and here, the reuse water tank 5 is connected with an acid liquid dosing tank 32 to The pH of the filtered water is adjusted in the tank 5, and a liquid level gauge 28 and a pH gauge 29 are arranged in the reuse water tank 5. The reuse water tank 5 is connected with a reuse water discharge pipe 26, and the reuse water discharge pipe 26 is connected with a Recycled water pump 27; the concentrated water outlet end of the tubular microfiltration membrane device 4 is connected to the water inlet end of the aforementioned concentrated water tank 3 .

The wet sludge output end of the concentrated water tank 3 is connected to the sludge thickening device 6 through the sludge pump 10, and the sludge thickening device 6 has a sludge filter water output end and a concentrated sludge output end, and the sludge filter water output end Connected to the filtrate tank 7, the water outlet end of the filtrate tank 7 is connected to the water inlet end of the aforementioned concentrated water tank 3 through the filtrate pump 11; the sludge thickening device 6 is a sludge thickening tank or a filter press (such as a plate and frame filter press) , the sludge pump 10 is an air-operated diaphragm pump, and the operator usually needs to take a sample from the aforementioned concentrated water tank 3 to do a simple sedimentation test. Through this test result, the air-operated diaphragm pump is adjusted on-site as needed to control the air-operated diaphragm pump. period and frequency.

In this technology, the tubular microfiltration membrane process is adopted, and its treatment process does not add any flocculant. The aforementioned tubular microfiltration membrane device 4 is a low-pressure (0.7-7bar, 10- 100psig) separation equipment, in practical applications, the corresponding water flow rate can be obtained by increasing or decreasing the number of membranes according to actual needs; the tubular microfiltration membrane device uses tubular membrane filtration technology under low pressure to realize waste water recycling and material Recycling, the water flowing through the membrane surface can take the intercepted particles away without accumulating on the membrane surface. When the membrane system is in operation, the wastewater pretreated by chemical dosing flows through the tubular membrane at high speed to maintain turbulent flow. , under the condition of operating pressure of 20-80psi, the clean liquid is filtered out through the membrane pores, while the suspended solid particles remain in the return liquid, and the return liquid maintains turbulent flow to prevent particles from accumulating on the inner surface of the membrane, so it can make The membrane system achieves very high membrane filtration flux and prolongs the service life of the membrane. This turbulent cross-flow filtration and large channel membrane tube remove the need for pretreatment, and can handle high solids content up to 5% by weight. liquid.

After the aforementioned tubular microfiltration membrane device 4 has been in operation for a period of time, its membrane needs to be cleaned. In this embodiment, the flow rate of the product water is continuously monitored (it can be monitored by a pressure gauge of the product water, a flow meter, etc.), when the monitored flow rate When the value is lower than the predetermined value, the electronic control unit can automatically control the following filter membrane cleaning system to work to chemically clean the membrane, use acidic cleaning solution to clean inorganic dirt, and use alkaline cleaning solution (such as NaClO) to remove organic matter. Before putting into operation again, the membrane needs to be rinsed with fresh water; all or part of the membrane can be automatically cleaned according to the arrangement of the membrane modules, and it usually takes 2 to 3 hours to complete one cleaning.

Specifically, the membrane cleaning system is an in-situ cleaning system, which includes a first cleaning water tank 13 , a second cleaning water tank 14 , a third cleaning water tank 15 and a cleaning water pump 12 .

The filtered water outlet end of the aforementioned tubular microfiltration membrane device 4 is also connected with a first cleaning outlet pipe 17, and the concentrated water outlet end of the aforementioned tubular microfiltration membrane device 4 is also connected with a second cleaning outlet pipe 18. The first cleaning outlet pipe 17. The water outlet side of the second cleaning outlet pipe 18 is jointly connected to the common pipeline 19, the common pipeline 19 has a cleaning wastewater discharge port 20, and the cleaning wastewater discharge port 20 is connected to the aforementioned wastewater collection tank 1; the first cleaning water tank 13 The water inlet end of the second cleaning water tank 14 is connected to the shared pipeline 19 through the first water inlet pipe 21, the water inlet end of the second cleaning water tank 14 is connected to the common pipeline 19 through the second water inlet pipe 22, and the water inlet end of the third cleaning water tank 15 is connected through the third water inlet pipe 23 Shared pipeline 19, the water outlet end of the first cleaning water tank 13 is connected to the water inlet end of the cleaning water pump 12 through the first water outlet pipe 33, and the water outlet end of the second cleaning water tank is connected to the water inlet end of the cleaning water pump through the second water outlet pipe 34, The water outlet end of the third cleaning water tank 15 is connected to the water inlet end of the cleaning water pump 12 through the third water outlet pipe 35, and the water outlet end of the cleaning water pump 12 is connected to the water inlet end of the tubular microfiltration membrane device 4 through the cleaning water inlet pipe 16, and, The water outlet of the cleaning water pump 12 is also connected with a liquid medicine discharge pipe 24, and the liquid medicine discharge pipe 24 is provided with a discharge switch, and the liquid discharged through the liquid medicine discharge pipe 24 can be discharged into the plate washing wastewater treatment system.

On the connecting pipeline between the concentrated water outlet end of the tubular microfiltration membrane device 4 and the concentrated water tank 3, on the connecting pipeline between the water outlet end of the concentrated water tank 3 and the water inlet end of the tubular microfiltration membrane device 4, on the connecting pipeline between the tubular microfiltration membrane device 4 On the connecting pipe between the filtered water outlet end and the reuse water tank 5, on the cleaning water inlet pipe 16, the first cleaning water outlet pipe 17, the second cleaning water outlet pipe 18, the first water inlet pipe 21, the second water inlet pipe 22, the first water inlet pipe 22, the The two water inlet pipes 23, the common pipe 19, the first water outlet pipe 33, the second water outlet pipe 34 and the third water outlet pipe 35 are all provided with switches.

The aforementioned copper sheet grinding wastewater treatment and recycling system can be widely used in many fields, such as: (1), metal electroplating: mainly used to remove heavy metal ions, and the ion concentration after treatment is lower than 0.1ppm; (2), printed circuit board: It is mainly used to remove heavy metal ions, and the ion concentration after treatment is lower than 0.1ppm; (3), semiconductor: after treatment, the concentration of arsenic compounds is lower than 0.1ppm, and after treatment, the concentration of fluorine compounds is lower than 5ppm, which reduces the loss of silicon and removes ions, recovery of metals, etc. from electroplating wastewater from lead to tin; (4) recharge groundwater: mainly remove heavy metal ions, after treatment, the ion concentration is lower than 0.1ppm; (5) battery manufacturing: remove lead and cadmium in sewage; (6) Automobile manufacturing: mainly removes zinc and phosphate contained in phosphate treatment engineering; (7) General industrial use: mainly removes heavy metal substances in incineration and cleaning water, and is used for pretreatment before reverse osmosis in wastewater reuse, It is used to soften water in circulating water, and the overall heavy metal removal rate reaches 0.1ppm. It can replace clarification tank after sand filtration process.

The design focus of the present invention is, it is mainly through the design and the Cooperating with each other, the copper sheet grinding wastewater treatment and recycling system of the present invention has a high degree of automation, simple operation, can control the gap operation as required, can adjust the flow rate of produced water as required, adds less water treatment chemicals, and has reliable filtered water quality. It has many advantages such as high efficiency, environmental protection and energy saving, and resource reuse, and is suitable for popularization and application.

The above descriptions are only preferred embodiments of the present invention, and do not limit the technical scope of the present invention in any way, so any minor modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention are still valid. It belongs to the scope of the technical solutions of the present invention.

Claims (7)

1. a copper sheet abrasive waste water treatment for reuse system, is characterized in that: include electric control unit, wastewater collection pond, reaction water tank, concentrated water tank, tube type filter membrance device, reuse water tank, sludge concentration device, filtrate box and filter membrane cleaning system; Wherein, this wastewater collection pond, reaction water tank, concentrated water tank, tube type filter membrance device, reuse water tank connect successively according to technical process;

The water intake end of the water side ligation water tank in this wastewater collection pond, the water side of this reaction water tank connects the water intake end of concentrated water tank, this concentrated water tank has water side and wet mud output terminal, the water side pipe connecting of this concentrated water tank declines filter membrane device water intake end, the water side of this tube type filter membrance device includes drainage water side and dense water water side, the drainage water side of this tube type filter membrance device connects the water intake end of reuse water tank, and the dense water water side of this tube type filter membrance device connects the water intake end of aforementioned concentrated water tank;

The wet mud output terminal of this concentrated water tank is connected to sludge concentration device through sludge pump, this sludge concentration device has mud drainage output terminal and thickened sludge output terminal, this mud drainage output terminal is connected to filtrate box, and the water side of this filtrate box connects the water intake end of aforementioned concentrated water tank through filtrate pump;

This filter membrane cleaning system includes the first cleaning water tank, the second cleaning water tank, the 3rd cleaning water tank and flushing water pump, the drainage water side of aforementioned tube type filter membrance device is also connected with the first cleaning rising pipe, the dense water water side of aforementioned tube type filter membrance device is also connected with the second cleaning rising pipe, the water outlet side of this first cleaning rising pipe, the second cleaning rising pipe is connected in common conduit jointly, this common conduit has Cleaning Wastewater discharge outlet, and this Cleaning Wastewater discharge outlet is connected to aforementioned wastewater collection pond, the water intake end of this first cleaning water tank connects common conduit through the first water inlet pipe, the water intake end of this second cleaning water tank connects common conduit through the second water inlet pipe, the water intake end of the 3rd cleaning water tank connects common conduit through the 3rd water inlet pipe, water side first rising pipe of this first cleaning water tank is connected to the water intake end of flushing water pump, water side second rising pipe of this second cleaning water tank is connected to the water intake end of flushing water pump, water side the 3rd rising pipe of the 3rd cleaning water tank is connected to the water intake end of flushing water pump, the water side of this flushing water pump is connected to tube type filter membrance device water intake end through cleaning inhalent siphon, on connecting tube between the dense water water side of tube type filter membrance device and concentrated water tank, on connecting tube between the water side of concentrated water tank and tube type filter membrance device water intake end, on connecting tube between the drainage water side of tube type filter membrance device and reuse water tank, on cleaning inhalent siphon, first cleaning rising pipe, second cleaning rising pipe, first water inlet pipe, second water inlet pipe, 3rd water inlet pipe, common conduit, first rising pipe, second rising pipe and the 3rd rising pipe are provided with switch.

2. copper sheet abrasive waste water treatment for reuse system according to claim 1, is characterized in that: the water side of described flushing water pump is also connected with liquid medicine delivery pipe, and this delivery pipe is provided with blow-off cock.

3. copper sheet abrasive waste water treatment for reuse system according to claim 1, is characterized in that: be connected by lift pump between the water side in described wastewater collection pond with the water intake end of reaction water tank, and the water side of described reaction water tank is higher than the water intake end of concentrated water tank.

4. copper sheet abrasive waste water treatment for reuse system according to claim 1, it is characterized in that: described sludge concentration device is sludge thickener or pressure filter, described sludge pump is pneumatic diaphragm pump.

5. copper sheet abrasive waste water treatment for reuse system according to claim 1, is characterized in that: be provided with liquidometer in described concentrated water tank, and the information feed back of this liquidometer is to aforementioned electric control unit; The water side of aforementioned concentrated water tank is connected to tube type filter membrance device water intake end through recycle pump, and aforementioned electric control unit is according to the keying of the information Control recycle pump of liquidometer.

6. copper sheet abrasive waste water treatment for reuse system according to claim 1, is characterized in that: described reaction water tank is connected with alkali lye dosing tank and PAC dosing tank, is provided with liquidometer and PH meter in described reaction water tank.

7. copper sheet abrasive waste water treatment for reuse system according to claim 1, it is characterized in that: described reuse water tank is connected with acid solution dosing tank, liquidometer and PH meter is provided with in described reuse water tank, described reuse water tank is connected with reuse water delivery pipe, and this reuse water delivery pipe is connected with reuse water pump.