CN117326776A - Sludge treatment equipment - Google Patents

Abstract

This application discloses a sludge treatment equipment. The sludge treatment equipment includes a centrifuge, a sewage tank, a first conveyor belt, a sludge freezing box and a cooling medium transport pipe; the centrifuge is equipped with a sludge feed inlet, a sewage outlet and a The sludge discharge port, the centrifuge separates the sewage from the sludge and reduces the moisture content of the sludge; the outlet of the cooling medium conveying pipe faces the sludge discharge port, and the sludge discharge port faces the loading end of the first conveyor belt, so The sludge in the sludge discharge port can be put into the loading end of the first conveyor belt through the cooling medium output from the cooling medium conveying pipe. The cooling medium directly contacts the sludge, improving the sludge freezing speed and convenience. The first conveyor belt is located in the sludge freezing box and is equipped with a plurality of cooling bodies on the belt surface. The sludge put on the first conveyor belt contacts the cooling bodies for freezing, thereby improving the degree of freezing and solidification of the sludge. The freezing method destroys the cell structure and colloidal structure of microorganisms in the sludge, improves the dehydration performance of the sludge, and increases the dehydration rate of the sludge.

Description

Sludge treatment equipment

Technical field

This application belongs to the field of sludge treatment technology, specifically involving sludge treatment equipment.

Background technique

With the rapid development of my country's economy and the acceleration of urbanization, more and more sewage is produced every day, and the corresponding sludge production in sewage treatment plants is also increasing.

At present, most of the sludge treatment processes used in my country's sewage treatment plants can only reduce the moisture content of sludge to about 80%. High sludge moisture content is a key issue restricting sludge disposal and utilization. Therefore, how to improve the dehydration rate of sludge has become an urgent problem to be solved.

Contents of the invention

In order to solve the technical problem of low sludge dehydration rate in related technologies, this application provides a method.

This application provides a sludge treatment equipment, which includes:

The centrifuge is equipped with a sludge inlet, a sewage outlet and a sludge outlet for putting in sludge;

A sewage tank connected to the sewage outlet;

The first conveyor belt, the sludge discharge port faces the loading end of the first conveyor belt, and the belt surface of the first conveyor belt is equipped with a plurality of cooling bodies;

Sludge freezing box, the first conveyor belt is located in the sludge freezing box;

Cooling medium conveying pipe, the outlet of the cooling medium conveying pipe is located in the sludge freezing box, and the outlet of the cooling medium conveying pipe faces the sludge discharge port.

In some embodiments, the sludge treatment equipment further includes a cooling zone, the sludge discharge port is connected to the cooling inlet of the cooling zone, and the cooling outlet of the cooling zone is vertically connected to the cooling zone. The sludge discharge port corresponds to the outlet of the cooling medium conveying pipe and is connected to the cooling zone.

In some embodiments, the cooling zone is configured in a straight cylinder shape, one end of the cooling zone is connected to the inner wall of the sludge freezing box and communicates with the sludge outlet, and the cooling medium delivery pipe The outlet is connected to the side wall of the cooling zone and communicates with the inside of the cooling zone.

In some embodiments, a plurality of the cooling bodies are evenly distributed on the belt surface of the first conveyor belt.

In some embodiments, the cooling body is protruding from the belt surface of the first conveyor belt, and the side of the cooling body away from the belt surface of the first conveyor belt is provided as an arc surface.

In some embodiments, the cooling body is a thermoelectric cooling body.

In some embodiments, the sludge treatment equipment further includes a cooling medium storage tank located outside the sludge freezing box, one end of the cooling medium delivery pipe is connected to the cooling medium storage tank, and the other end extends to In the sludge freezing box, a plurality of cooling medium outlets are provided at positions corresponding to the cooling medium conveying pipe and the belt surface of the first conveyor belt.

In some embodiments, the extending direction of the cooling medium conveying pipe is consistent with the conveying direction of the first conveyor belt.

In some embodiments, the sludge treatment equipment further includes a second conveyor belt that is consistent with the conveying direction of the first conveyor belt, and the second conveyor belt is located on the first conveyor belt and is spaced apart from the first conveyor belt. , the feed end of the second conveyor belt and the feed end of the first conveyor belt are spaced apart along the conveying direction of the first conveyor belt.

In some embodiments, the sewage tank is located above the sludge freezing box, and the centrifuge further includes a sludge discharge pipe connected to the sludge discharge port, and the sludge discharge pipe is away from the One end of the sludge discharge port extends into the sludge freezing box and faces the loading end of the conveyor belt. .

According to the sludge treatment equipment provided by one or more embodiments of the present application, the sludge treatment equipment includes a centrifuge, a sewage tank, a first conveyor belt, a sludge freezing box, and a cooling medium delivery pipe. The centrifuge is equipped with a sludge inlet, a sewage outlet and a sludge outlet for sludge. The rotation of the centrifuge separates the sewage from the sludge and reduces the moisture content of the sludge. The sewage tank is connected to the sewage outlet. The outlet of the cooling medium conveying pipe is located in the sludge freezing box, and the outlet of the cooling medium conveying pipe faces the sludge outlet, and the sludge outlet faces the loading end of the first conveyor belt. In this way The sludge in the sludge discharge port can be put into the loading end of the first conveyor belt through the cooling medium output from the cooling medium delivery pipe. The cooling medium directly contacts the sludge, improving the sludge freezing speed and convenience. The first conveyor belt is located in the sludge freezing box, and the belt surface of the first conveyor belt is equipped with a plurality of cooling bodies. The sludge put on the first conveyor belt contacts the cooling bodies for freezing, thereby improving the degree of freezing and solidification of the sludge. The freezing method destroys the cell structure of microorganisms and the colloid structure in the sludge, changes the distribution of water in the sludge, improves the dehydration performance of the sludge, and increases the dehydration rate of the sludge.

Description of drawings

Figure 1 is a schematic structural diagram of sludge treatment equipment in one or more embodiments of the present application;

Figure 2 is a cross-sectional view of the overall structure of the sludge treatment equipment in one or more embodiments of the present application;

Figure 3 is a cross-sectional view of the overall structure of a centrifuge in one or more embodiments of the present application.

Explanation of reference symbols:

10. Centrifuge; 11. Sludge inlet; 12. Box shell; 13. Sewage discharge pipe; 14. Sewage dehydration inner cylinder; 141. Water filter hole; 15. Sludge discharge pipe; 16. Motor; 17 , rotating shaft; 18. spiral piece; 19. cover plate;

20. Sewage tank; 30. First conveyor belt; 31. Feeding end; 32. Cooling body;

40. Sludge freezer; 50. Cooling medium delivery pipe; 51. Cooling medium outlet;

60. Cooling area; 61. Cooling inlet; 62. Cooling outlet; 70. Cooling medium storage tank;

80. Second conveyor belt; 90. Sludge storage tank.

Detailed ways

In order to enable those skilled in the technical field of this application to understand this application more clearly, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of this application. Obviously, the described The embodiments are only some of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of this application.

With the rapid development of my country's economy and the acceleration of urbanization, more and more sewage is produced every day, and the corresponding sludge production in sewage treatment plants is also increasing. At present, most of the sludge treatment processes used in my country's sewage treatment plants can only reduce the moisture content of sludge to about 80%. High sludge moisture content is a key issue restricting sludge disposal and utilization.

Commonly used sludge treatment processes include landfill, composting and drying. Due to the large water content of sludge, direct landfilling of sludge will affect the normal operation of the landfill and occupy a large landfill area. Currently, sludge landfilling is prohibited. Sludge contains a large amount of toxic and harmful substances such as heavy metals, which results in low market acceptance of sludge compost products and makes it difficult to promote and use sludge compost technology on a large scale. Sludge drying technology usually uses high-temperature and high-pressure steam as the heat source and uses "heat exchange" to dry sludge, which has high energy consumption and operating costs; high-temperature and high-pressure drying also has the risk of dust explosion; at the same time, the high-temperature treatment process Among them, the phenomenon of sludge sticking to the wall leads to poor operational stability of the sludge drying equipment. The moisture content of the processed sludge is high, and the volume of sludge is large, which is not conducive to the subsequent treatment of sludge and the resources of sludge. utilization.

In order to solve the above problems, this application provides a sludge treatment equipment. Please refer to Figures 1 to 2. The sludge treatment equipment includes a centrifuge 10, a sewage tank 20, a first conveyor belt 30, a sludge freezing box 40 and a cooling medium. Delivery tube 50.

Please refer to Figure 2. The centrifuge 10 includes a box shell 12, a sewage dehydration inner cylinder 14, a motor 16, a rotating shaft 17 and a spiral blade 18 provided on the rotating shaft 17. At the same time, the centrifuge 10 is equipped with a sewage pump for putting sludge. Mud inlet 11, sludge water outlet (not shown in the figure) and sludge outlet (not shown in the figure). Specifically, the box outer shell 12 and the sewage dehydration inner cylinder 14 can be configured to be cylindrical, and the upper parts of the box outer shell 12 and the sewage dehydration inner cylinder 14 can be configured to be open, respectively. The box outer shell 12 and the sewage dehydration inner cylinder 14 The lower parts are respectively configured with bottom surfaces. The centrifuge 10 is also equipped with a cover plate 19, and the cover plate 19 can cover the opening of the box outer shell 12 and the sewage dehydration inner cylinder 14 at the same time. The sludge feed port 11 is opened in the cover plate 19, and the sludge feed is The outlet of the port 11 is connected with the sewage dehydration inner cylinder 14. It is understandable that the sludge can be transported into the sludge dehydration inner cylinder through the sludge feed port 11. The bottom surface of the box shell 12 is equipped with a sewage outlet. The sewage outlet is used for discharging sewage and is connected to the sewage tank 20 so that the sewage in the box shell 12 enters the sewage tank 20 . The bottom surface of the sewage dehydration inner cylinder 14 is equipped with a sludge discharge port, and the sludge discharge port penetrates the bottom surface of the box shell 12 and communicates with the sludge freezing box 40, so that the sludge in the sewage dehydration inner cylinder 14 enters the sludge In the freezing box 40; at the same time, a plurality of water filter holes 141 are provided on the peripheral surface of the sewage dehydration inner cylinder 14, so that the sewage is separated from the sludge under the rotation of the centrifuge 10, so that the sewage enters through the water filter holes 141. into the box shell 12, and the sewage in the box shell 12 enters the sewage tank through the sewage outlet.

In some embodiments, the bottom surfaces of the box shell 12 and the sewage dewatering inner cylinder 14 can be configured as open openings respectively, and the centrifuge 10 includes a bottom plate (not shown in the figure), which covers the open mouth of the box shell 12 And the open opening of the sewage dehydration inner cylinder 14, the sewage outlet and the sludge discharge port are respectively opened on the bottom plate, and the sewage outlet is connected to the box shell 12, and the sludge discharge port is connected to the sewage dehydration inner cylinder 14.

Please refer to Figure 2. The rotating shaft 17 is located in the sewage dewatering inner cylinder 14, and the axis of the rotating shaft 17 is collinear with the axis of the sewage dehydrating inner cylinder 14. The motor 16 is located on the cover 19, and the drive shaft of the motor 16 is coaxial and fixedly connected to the rotating shaft 17, so that the motor 16 can drive the rotating shaft 17 to rotate, which can save the arrangement space of the sludge treatment equipment and improve space utilization. .

The drive shaft of the motor 16 is directly connected to the rotation shaft 17 and is located at the top of the box shell 12, thereby improving the driving efficiency of the motor 16 and saving the layout space of the sludge treatment equipment, thereby improving space utilization.

In order to improve the dehydration rate and efficiency of sludge, please refer to FIGS. 2 to 3 . Multiple spiral blades 18 are provided and connected to the circumferential side of the rotating shaft 17 . The sludge with higher water content is put into the sewage dewatering inner cylinder 14 from the sludge feed port 11. The motor 16 drives the rotating shaft 17 to rotate, and the spiral blade 18 located on the rotating shaft 17 also rotates. The spiral blade 18 can dewater the sludge. After comprehensive stirring, the sludge can be driven by the spiral blade 18 to rotate the sewage in the sludge away from the sludge, and the water (sewage) in the sludge will be discharged through the water filter hole 141 on the sewage dehydration inner cylinder 14 , so that the sewage is collected at the bottom of the sewage dewatering inner cylinder 14 under the action of gravity, and is discharged to the sewage tank 20 through the sewage outlet, which can reduce the water content in the sludge. The dehydrated sludge in the sewage dehydration inner cylinder 14 is gathered to the bottom surface of the sewage dehydration inner cylinder 14 under the action of gravity, and is discharged to the sludge freezing box 40 through the sludge discharge port.

It should be noted that the spiral blade 18 can fully stir the sludge, which helps to dehydrate the sludge quickly, dehydrate the sludge more evenly, and improve the dehydration rate of the sludge. The water filter holes 141 on the sewage dehydration inner cylinder 14 can be graphene water purification nets. Sludge and sewage can be effectively separated through the graphene water purification nets, improving the dehydration rate of sludge. At the same time, due to the wear resistance of the graphene water purification nets It has good performance and can extend the service life of the graphene water purification network.

The sewage tank 20 is connected with the sewage outlet on the bottom surface of the box shell 12 and is used to collect the sewage discharged from the box shell 12 . The sludge discharge port is connected with the sludge freezing box 40, so that the sludge discharged from the sludge discharge port can enter the sludge freezing box 40.

Please refer to Figures 1 to 2. The first conveyor belt 30 is located in the sludge freezing box 40, and the sludge discharge port faces the loading end 31 of the first conveyor belt 30, so that the sludge discharged through the sludge discharge port can be put in to the loading end 31 of the first conveyor belt 30, and the sludge is discharged from the first conveyor belt 30.

The outlet of the cooling medium delivery pipe 50 is located in the sludge freezing box 40, and the outlet of the cooling medium delivery pipe 50 faces the sludge discharge port, so that the sludge in the sludge discharge port can pass through the cooling medium output by the cooling medium delivery pipe 50 Put it into the loading end 31 of the first conveyor belt 30 . The cooling medium can be liquid nitrogen, refrigerant nitrogen, Freon, etc. It should be noted that in order to increase the freezing speed of sludge, -196℃ ultra-low temperature liquid nitrogen, -33℃ refrigerant ammonia or -30℃~ -40℃ Freon, the specific freezing medium is not limited in this application and can be set according to actual needs.

It should be noted that if the human body comes into direct contact with leaked liquid nitrogen, there is a risk of frostbite. At the same time, inhaling high concentrations of nitrogen can also cause death by asphyxiation. In order to improve the safety of operators, the sludge freezing box 40 is a relatively closed box, which can avoid leakage of liquid nitrogen and ensure the safety of operators.

Taking the cooling medium as liquid nitrogen as an example, the sludge discharged from the sludge outlet passes through liquid nitrogen, which cools the sludge. The freezing method ruptures the cell walls of the sludge, destroys the cell structure of the microorganisms in the sludge, and causes The water is separated, destroying the colloidal structure in the sludge, changing the distribution of water in the sludge, meeting the rupture requirements of the sludge cells required for the release of interstitial water in the sludge cells, thereby improving the dehydration performance of the sludge.

Understandably, the centrifuge 10 performs preliminary pretreatment on the sludge, so that the sludge and sewage are separated under the rotation of the centrifuge 10, thereby reducing the water content in the sludge and increasing the dehydration rate of the sludge; and then dehydrating the sludge. The sludge is frozen under the influence of liquid nitrogen. The dehydration of the sludge in the centrifuge 10 and the freezing of liquid nitrogen synergize to freeze the sludge after dehydration. Freezing can destroy the binding force between the sludge and the sewage and the colloid structure in the sludge, and can improve the freezing and solidification of the sludge. The dehydration speed of the subsequent dehydration process. Compared with the drying treatment of sludge, the synergistic effect of centrifuge 10 dehydration and liquid ammonia refrigeration does not require high-temperature and high-pressure steam as a heat source, which can reduce the energy consumption of sludge dehydration to a certain extent; it can also avoid high-temperature drying. The existing risk of dust explosion improves the safety and stability of sludge dewatering.

The sludge freezing box 40 can be configured as a rectangular parallelepiped. The sludge discharge port is connected with the upper top surface of the sludge freezing box 40 . The first conveyor belt 30 is located in the sludge freezing box 40 and placed on the lower bottom surface of the sludge freezing box 40 . The sludge discharge port corresponds to the loading end 31 of the first conveyor belt 30 in the vertical direction, so that the sludge discharged from the sludge discharge port can be put into the loading end 31 of the first conveyor belt 30 .

Referring to Figures 1 to 2, a cooling area 60 is provided on the top surface of the sludge freezing box 40 near the connection between the sludge discharge port and the sludge freezing box 40. The cooling inlet 61 between the sludge discharge port and the cooling area 60 is The cooling outlet 62 of the cooling zone 60 corresponds to the sludge discharge port in the vertical direction, and the outlet of the cooling medium conveying pipe 50 is connected to the cooling zone 60; in this way, the sludge in the sludge discharge port moves along the vertical direction under the action of gravity. It enters the cooling zone 60 from the cooling inlet 61 of the cooling zone 60 and is discharged from the cooling outlet 62 of the cooling zone 60. At the same time, since the outlet of the cooling medium delivery pipe 50 is connected to the cooling zone 60, the liquid nitrogen can fill the cooling zone 60 and after cooling The sludge in zone 60 is frozen by the action of liquid nitrogen to improve the convenience of sludge freezing.

Understandably, please refer to FIGS. 1 to 2 , the cooling zone 60 can be configured in a straight cylindrical shape, the straight cylindrical cooling zone 60 is arranged along the vertical direction, and the cross-sectional shape of the cooling zone 60 perpendicular to the vertical direction can be rectangular, and It has a cooling inlet 61 located above and a cooling outlet 62 located below. In this way, the upper top surface of the sludge freezing box 40 seals the entrance of the cooling zone 60, and the adjacent two side walls of the cooling zone 60 are respectively in contact with the adjacent two side walls of the sludge freezing box 40. The other two sides of the cooling zone 60 The walls are respectively parallel to the two side walls of the sludge freezing box 40 . The upper end of the cooling zone 60 is connected to the upper top surface of the sludge freezing box 40 and communicates with the sludge discharge port, so that the sludge can pass through the cooling zone 60 in the vertical direction. At the same time, the outlet of the cooling medium delivery pipe 50 is connected to the vertical side wall of the cooling zone 60 and communicates with the cooling zone 60 , so that the liquid nitrogen in the cooling medium delivery pipe 50 can be delivered to the cooling zone 60 , because the cooling zone 60 Being arranged in a cylindrical shape can improve the uniformity of the distribution of liquid nitrogen in the cooling zone 60, which ensures that the sludge passing through the cooling zone 60 can contact the liquid nitrogen for freezing, thereby improving the convenience of sludge freezing. At the same time, the cooling zone 60 can collect the liquid nitrogen transported by the cooling medium transport pipe 50, increase the concentration of liquid nitrogen in the cooling zone 60, increase the contact area between sludge and liquid nitrogen, and thereby increase the cooling speed of the sludge.

It should be noted that the cooling area 60 may also refer to a designated area in the sludge freezing box 40. Liquid nitrogen is transported to this designated area through the cooling medium delivery pipe 50, and at the same time, the sludge is cooled under the action of gravity. The area 60 enters the loading end 31 of the first conveyor belt 30, so that when the sludge passes through this designated area, the sludge can be quickly frozen under the action of liquid nitrogen. The freezing method of the sludge is simple and can improve the efficiency of the sludge. The speed of freezing of mud.

The sludge is discharged from the outlet of the cooling zone 60 under the action of gravity and put into the loading end 31 of the first conveyor belt 30 . A plurality of cooling bodies 32 are arranged on the belt surface of the first conveyor belt 30. Since the sludge has a certain water content, the shape of the sludge is uncertain. In this way, the sludge is thrown onto the first conveyor belt 30 at an uncertain position under the action of gravity. In order to enable the sludge put on the first conveyor belt 30 to contact the cooling bodies 32 provided on the first conveyor belt 30, a plurality of cooling bodies 32 are evenly distributed on the belt surface of the first conveyor belt 30, thus ensuring that the sludge put on the first conveyor belt 30 is put into contact with the cooling bodies 32 arranged on the first conveyor belt 30. The sludge on the surface of the belt 30 can be in contact with the cooling body 32, which can further cool the sludge, ensure the freezing speed of the sludge and increase the degree of freezing and solidification of the sludge.

The spherical microstructure on the conveyor belt has an electric refrigeration function, which can accelerate the refrigeration speed and assist in enhancing the liquid nitrogen refrigeration capacity. The surface of the spherical structure is a smooth curved surface, and compared with other rectangular structures, there will be no backlog of sludge residue.

At the same time, by reducing the distance between adjacent cooling bodies 32, when the sludge falls on the belt surface of the first conveyor belt 30, the number of cooling bodies 32 that the sludge contacts can be increased. Since each cooling body 32 has a cooling effect, increasing the number of cooling bodies 32 in contact with the sludge can speed up the cooling speed of the sludge.

The cooling body 32 is protruding from the belt surface of the first conveyor belt 30, which can increase the friction between the sludge and the first conveyor belt 30, so that the sludge can adhere more firmly to the belt surface of the first conveyor belt 30 under the action of gravity. On the other hand, the first conveyor belt 30 can transport the sludge from the first loading end 31 to the discharging end. At the same time, when the first conveyor belt 30 transports the sludge from the loading end 31 to the discharging end, the sludge is always in contact with the cooling body 32. When the sludge is transported from the loading end 31 to the discharging end, by increasing the cooling body The contact time between 32 and the sludge increases the solidification degree of the sludge; in this way, the solidified sludge can be stored at the discharge end of the first conveyor belt 30 .

The side of the cooling body 32 away from the belt surface of the first conveyor belt 30 is set as an arc surface, which can increase the contact area between the cooling body 32 and the sludge and improve the freezing speed of the sludge; at the same time, the surface of the cooling body 32 is a smooth arc surface ( Or a hemispherical surface), which can prevent the accumulated sludge from remaining and improve the convenience of separation between the sludge and the cooling body 32. It should be noted that the cooling body 32 may be a thermoelectric cooling body. Specifically, thermoelectric refrigeration usually refers to solar semiconductor refrigeration technology. Semiconductor refrigeration is usually a refrigeration method that utilizes the thermoelectric refrigeration effect. The operating principle of semiconductor refrigeration is a well-known technology for those skilled in the art and will not be described in detail here.

The sludge treatment equipment also includes a cooling medium storage tank 70 located outside the sludge freezing box 40. One end of the cooling medium delivery pipe 50 is connected to the cooling medium storage tank 70, and the other end extends into the sludge freezing box 40. The cooling medium is transported The pipe 50 is provided with a plurality of cooling medium outlets 51 (not shown in the figure) at positions corresponding to the belt surface of the first conveyor belt 30, so that during the process of sludge being transported from the upper end 31 to the lower end of the first conveyor belt The liquid nitrogen discharged from the cooling medium outlet 51 can also directly act on the sludge. In this way, during the transportation of the sludge on the first conveyor belt 30, the cooling body 32 and the liquid nitrogen can act on the sludge at the same time, which can improve the freezing of the sludge. The speed can also ensure the time for the sludge to be transported to the discharge end of the first conveyor belt 30, ensure the degree of freezing and solidification of the sludge, enable the solidified sludge to be stored, and improve the convenience of sludge storage.

It should be noted that since there is a lot of sludge and the shape is uneven, the sludge treatment equipment uses the synergistic effect of the cooling body 32 and liquid nitrogen to increase the freezing speed of the sludge, thereby improving the operating efficiency of the sludge treatment.

In order to ensure that the liquid nitrogen output from the cooling medium outlet 51 in the cooling medium delivery pipe 50 can cover the belt surface range of the first conveyor belt 30 , please refer to FIGS. 1 to 2 . The extension direction of the cooling medium delivery pipe 50 is consistent with the first conveyor belt 30 The conveying directions of the cooling medium conveying pipe 50 are consistent, and a plurality of cooling medium outlets 51 are provided on the side of the cooling medium conveying pipe 50 close to the first conveyor belt 30, so that the cooling medium can be sprayed from the top of the first conveyor belt 30 to the belt surface of the first conveyor belt 30. , can increase the coverage area with the belt surface of the first conveyor belt 30, ensuring that the sludge can always receive the action of liquid nitrogen during the process of being transported from the loading end 31 to the discharging end of the first conveyor belt 30, increasing the interaction between the sludge and the liquid. The interaction between nitrogen increases the solidification and molding speed of sludge.

Referring to FIGS. 1 to 2 , the sludge treatment equipment also includes a second conveyor belt 80 that is consistent with the conveying direction of the first conveyor belt 30 . The second conveyor belt 80 is located on the first conveyor belt 30 and is spaced apart from the first conveyor belt 30 . The feed end of the conveyor belt 80 and the feed end of the first conveyor belt 30 are spaced apart along the conveying direction of the first conveyor belt 30. It can be understood that the sludge discharge port can be vertically connected to the feed end of the second conveyor belt 80. The spacing positions between the feed ends of the first conveyor belt 30 are corresponding, so that the sludge can be put onto the belt surface of the first conveyor belt 30 .

As the first conveyor belt 30 rotates, the sludge moves from the loading end 31 of the first conveyor belt 30 to the discharging end of the first conveyor belt 30. The sludge on the first conveyor belt 30 comes into contact with the second conveyor belt 80. , and as the first conveyor belt 30 runs, the sludge enters the space between the first conveyor belt 30 and the second conveyor belt 80. The rotation directions of the first conveyor belt 30 and the second conveyor belt 80 are opposite, and the sludge is in the first conveyor belt 30 and the second conveyor belt 80. During the transportation process of the conveyor belt 30, since the interval set between the first conveyor belt 30 and the second conveyor belt 80 is a constant value, when the sludge enters the interval between the first conveyor belt 30 and the second conveyor belt 80, the sludge will The mud is compressed, and the compressed sludge can increase the contact area with the belt surface of the first conveyor belt 30, thereby increasing the number of contacts between the sludge and the cooling body 32, and increasing the contact area between the sludge and the cooling body 32. Further improve the cooling and solidification efficiency of sludge. At the same time, the shape of the sludge can also be compressed and limited to obtain sludge with a lower moisture content, which facilitates the storage of the solidified sludge; it can reduce the volume of the sludge to a certain extent, which is beneficial to the subsequent treatment and processing of the sludge. Resource utilization of sludge.

Understandably, please refer to FIGS. 1 to 2 , the sewage tank 20 can also be configured as a rectangular parallelepiped and the sewage tank 20 is located above the sludge freezing box 40 , and the bottom surface of the sewage tank 20 is on the top surface of the sludge freezing box 40 The projection can coincide with the top surface of the sludge freezing box 40, so that the sewage tank 20 is stacked above the sludge freezing box 40, thereby improving the compactness of the sludge treatment equipment and improving the space utilization of the sludge treatment equipment.

Please refer to Figures 1 to 2. At the same time, the centrifuge 10 also includes a sludge discharge pipe 15 connected with the sludge discharge port. The end of the sludge discharge pipe 15 away from the sludge discharge port extends into the sludge freezing box 40 and Toward the loading end 31 of the conveyor belt, the sewage tank 20 can be stacked on the sludge freezing box 40 to ensure that the sludge can enter the sludge freezing box from the sludge outlet along the sludge discharge pipe 15 under the action of gravity. Box of 40. At the same time, the centrifuge 10 also includes a sewage discharge pipe 13 connected with the sewage outlet. The end of the sewage drain pipe away from the sewage outlet extends into the sewage tank 20, so that the water in the box shell 12 can enter through the sewage discharge pipe 13. into the sewage tank 20.

Sewage and sludge can enter the sewage tank 20 and the sludge freezing box 40 through different pipelines respectively. This can ensure the stacking of the sludge freezing box 40 and the sewage tank 20, improve the compactness of the equipment and improve space utilization. , while ensuring that the sewage in the box shell 12 can enter the sewage tank 20 through the sewage discharge pipe 13, and the sludge in the sewage dehydration inner cylinder 14 can enter the sludge freezing box 40 through the sludge discharge pipe 15, And the sewage tank 20 and the sludge freezer 40 are respectively located below the centrifuge 10. The sewage can enter the sewage tank 20 by gravity, and the sludge can enter the sludge freezer 40 by gravity. The sewage and sludge discharge processes are respectively Operation can improve the efficiency of separation of sewage and sludge.

The sludge treatment equipment also includes a sludge storage tank 90. The outlet of the sludge freezing tank 40 is connected with the sludge storage tank 90. The solidified shaped sludge discharged from the outlet of the first conveyor belt 30 can enter the sludge storage tank 90. , the solidified sludge is stored in the sludge storage tank 90 to facilitate subsequent processing of the solidified sludge. In this way, the discharge port of the sludge freezing box 40 is directly connected to the sludge storage box 90 to avoid liquid nitrogen leakage in the sludge freezing box 40 from causing harm to the operator.

The sludge is dewatered using the centrifuge 10. The sludge enters the sewage dehydration inner cylinder 14 through the sludge feed port 11. The motor 16 drives the rotating shaft 17 to rotate. The spiral blade 18 connected to the rotating shaft 17 can fully stir the sludge. , the sludge can be driven by the spiral blade 18 to rotate the sewage in the sludge away from the sludge, and the sewage in the box shell 12 can enter the sewage tank 20 through the sewage discharge pipe 13; located in the sewage dehydration inner cylinder The sludge in 14 can enter the sludge freezing box 40 through the sludge discharge tube.

During the freezing stage of sludge, the cooling medium storage tank 70 is connected to the sludge freezing box 40 through the cooling medium delivery pipe 50, and the sludge freezing box 40 freezes the sludge using liquid nitrogen. The sludge treated with liquid nitrogen is put into the first conveyor belt 30 and contacts the cooling body 32 on the first conveyor belt 30, thereby increasing the contact area between the sludge and the cooling body 32 and increasing the freezing and solidification speed of the sludge. The first conveyor belt 30 and the second conveyor belt 80 compress the sludge. The compressed sludge can increase the contact area with the belt surface of the first conveyor belt 30, thereby increasing the number of contacts between the sludge and the cooling body 32. The large contact area between the sludge and the cooling body 32 further improves the cooling and solidification efficiency of the sludge. At the same time, the shape of the sludge can also be compressed and limited to facilitate the storage of solidified sludge. At the same time, the volume of sludge can be reduced to a certain extent, which is beneficial to the subsequent treatment of sludge and the utilization of sludge resources.

In this application, unless otherwise explicitly stated and limited, the term "above" or "below" a first feature on a second feature may include direct contact between the first and second features, or may also include the first and second features. Not in direct contact but through additional characteristic contact between them. Furthermore, the terms "above", "above" and "above" a first feature on a second feature include the first feature being directly above and diagonally above the second feature, or simply mean that the first feature is higher in level than the second feature. “Below”, “below” and “under” the first feature is the second feature includes the first feature being directly below and diagonally below the second feature, or simply means that the first feature is less horizontally than the second feature.

In the description of this application, it needs to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " The orientation or position indicated by "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" The relationship is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore It should not be construed as a limitation on this application.

In this application, unless otherwise clearly stated and limited, the terms "connection", "fixing", etc. should be understood in a broad sense. For example, "fixing" can be a fixed connection, a detachable connection, or an integral body; it can It can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two components or an interaction between two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

In addition, descriptions such as "first", "second", etc. in this application are for descriptive purposes only and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined as “first” and “second” may explicitly or implicitly include one or more features. In the description of this application, "plurality" means two or more than two, unless otherwise explicitly and specifically limited.

Although the embodiments of the present application have been shown and described, those of ordinary skill in the art will understand that various changes, modifications, substitutions and modifications can be made to these embodiments without departing from the principles and purposes of the present application. The scope of the application is defined by the claims and their equivalents.

Claims (10)

1. A kind of sludge treatment equipment, characterized in that, the sludge treatment equipment includes: The centrifuge is equipped with a sludge inlet, a sewage outlet and a sludge outlet for sludge dispensing; A sewage tank connected to the sewage outlet; The first conveyor belt, the sludge discharge port faces the loading end of the first conveyor belt, and the belt surface of the first conveyor belt is equipped with a plurality of cooling bodies; Sludge freezing box, the first conveyor belt is located in the sludge freezing box; Cooling medium conveying pipe, the outlet of the cooling medium conveying pipe is located in the sludge freezing box, and the outlet of the cooling medium conveying pipe faces the sludge discharge port. 2. The sludge treatment equipment according to claim 1, characterized in that the sludge treatment equipment further includes a cooling zone, the sludge discharge port is connected to the cooling inlet of the cooling zone, and the cooling zone The cooling outlet corresponds to the sludge discharge port in the vertical direction, and the outlet of the cooling medium transport pipe is connected to the cooling zone. 3. The sludge treatment equipment according to claim 2, characterized in that the cooling zone is configured in a straight tube shape, and one end of the cooling zone is connected to the inner wall of the sludge freezing box and is connected to the sludge cooling zone. The discharge port is connected, and the outlet of the cooling medium transport pipe is connected with the side wall of the cooling zone and communicates with the inside of the cooling zone. 4. The sludge treatment equipment according to claim 1, characterized in that a plurality of the cooling bodies are evenly distributed on the belt surface of the first conveyor belt. 5. The sludge treatment equipment according to claim 4, wherein the cooling body is protruding from the belt surface of the first conveyor belt, and the cooling body is away from the belt surface of the first conveyor belt. The sides are set to curved surfaces. 6. The sludge treatment equipment according to claim 4 or 5, characterized in that the cooling body is a thermoelectric cooling body. 7. The sludge treatment equipment according to claim 1, characterized in that the sludge treatment equipment further includes a cooling medium storage tank located outside the sludge freezing box, and one end of the cooling medium delivery pipe is connected to The cooling medium storage tank is connected, and the other end extends into the sludge freezing box. The cooling medium transport pipe has multiple cooling medium outlets at positions corresponding to the belt surface of the first conveyor belt. 8. The sludge treatment equipment according to claim 7, wherein the extending direction of the cooling medium conveying pipe is consistent with the conveying direction of the first conveyor belt. 9. The sludge treatment equipment according to claim 1, characterized in that the sludge treatment equipment further includes a second conveyor belt consistent with the conveying direction of the first conveyor belt, and the second conveyor belt is located on the first conveyor belt. On a conveyor belt and spaced apart from the first conveyor belt, the feed end of the second conveyor belt and the feed end of the first conveyor belt are spaced apart along the conveying direction of the first conveyor belt. 10. The sludge treatment equipment according to claim 1, characterized in that the sewage tank is located above the sludge freezing box, and the centrifuge further includes a sludge pipe connected to the sludge discharge port. Discharge pipe, one end of the sludge discharge pipe away from the sludge discharge port extends into the sludge freezing box and toward the loading end of the conveyor belt.