A sludge concentration and dehydration system

Abstract

The utility model relates to the field of water, wastewater, sewage or sludge, and provides a sludge concentration and dehydration system. The sludge concentrator includes a water supply pipeline, a sludge pipeline and a dosing pipeline; a first agitator is arranged in the first sludge storage tank; an auxiliary agent pipeline and a conditioning agent pipeline are arranged at the input end of the sludge coagulation device; and a mud cake processing device is provided with a sewage pipeline, a gas pipeline and a water pipeline. The sludge is initially concentrated by the sludge concentrator, and then transported and stored in the first sludge storage tank. The sludge lifting pump is turned on to transport the sludge to the sludge coagulation device, and the sludge is mixed and conditioned by adding auxiliary agents and conditioning agents, which is beneficial to the dehydration or coagulation of the sludge; then the sludge is transported to the mud cake processing device using a sludge feed pump, and the sludge is made into mud cakes for transportation. The whole process is relatively simple, and the operation complexity is relatively low, so as to achieve the purpose of reducing the cost of sludge treatment.

Description

Technical Field

[0001] The utility model relates to the field of water, wastewater, sewage or sludge treatment, and in particular to a sludge concentration and dehydration system. Background Art

[0002] With the development of society and the improvement of life, sludge concentration and dehydration process is an important sludge treatment technology, which aims to reduce the volume and weight of sludge for subsequent treatment and disposal. At present, with the continuous improvement of environmental protection requirements and the continuous development of sludge treatment technology, sludge concentration and dehydration process has also been widely used and continuously improved.

[0003] However, the existing sludge dewatering process has the following main disadvantages: 1. Complex equipment: Sludge dewatering requires professional dewatering equipment, and complex equipment requires professional operation and maintenance, which makes it difficult to train operators, the operation process is cumbersome, and it is easy to make human errors, so the operation requirements are high; 2. High energy consumption: The sludge dewatering process consumes a lot of energy, including electricity, heat, etc., which increases the processing cost. 3. The dewatering effect is affected by the nature of the sludge: The dewatering effect of sludge of different properties is also different. Some sludge is difficult to dewater and requires special treatment methods and secondary dehydration. 4. Secondary pollution: Some secondary pollutants, such as filtrate, waste gas, etc., may be generated during the sludge dewatering process, which need to be treated accordingly, resulting in an increase in treatment costs. Utility Model Content

[0004] The utility model aims to provide a sludge concentration and dehydration system, aiming to improve the problem that the existing sludge dehydration process equipment is complicated or the treatment effect is poor, resulting in high treatment costs.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme: a sludge concentration and dehydration system, comprising:

[0006] A sludge concentrator, comprising a water supply pipeline for conveying water to the concentrator, a sludge pipeline for conveying sludge to the concentrator, and a drug adding pipeline for conveying drug solution into the sludge pipeline;

[0007] A first sludge storage tank, which is connected to the output end of the sludge thickener, and a first agitator is arranged in the first sludge storage tank;

[0008] A sludge coagulation device, wherein a sludge lifting pump is arranged on the pipeline between the sludge coagulation device and the sludge storage tank, and an auxiliary agent pipeline and a conditioning agent pipeline are arranged at the input end of the sludge coagulation device; and

[0009] The mud cake processing device has a sludge feed pump arranged between its input end and the output end of the sludge coagulation device. The mud cake processing device is provided with a sewage pipeline for discharging sewage, a gas pipeline for supplying air to itself, and a water pipeline for supplying water to itself.

[0010] Preferably, the sludge thickener is a belt thickener, and the sludge pipeline includes a second sludge storage tank and a sludge pump for transporting the sludge in the second sludge storage tank to the belt thickener;

[0011] A second agitator is arranged in the second mud storage tank.

[0012] Preferably, the water supply pipeline includes a first water storage tank and a flushing water pump that pumps water in the first water storage tank to the sludge concentrator.

[0013] Preferably, a plurality of shower heads are provided on the water outlet end of the water supply pipeline.

[0014] Preferably, the dosing pipeline is provided with a PAM dosing device and a dosing pump that delivers the mixed liquid in the PAM dosing device to the sludge pipeline.

[0015] Preferably, a sludge return pipe is provided between the output end of the mud cake processing device and the input end of the first mud storage tank.

[0016] Preferably, the auxiliary agent pipeline is provided with an auxiliary agent storage tank and a metering pump for quantitatively transporting the fluid medium in the auxiliary agent storage tank to the sludge coagulation device;

[0017] The conditioning agent pipeline is provided with a conditioning agent storage tank and a metering device for quantitatively conveying the fluid medium in the conditioning agent storage tank to the sludge coagulation device, and a powder lifting device is provided on the input end of the conditioning agent storage tank.

[0018] Preferably, the gas pipeline is provided with an air compressor and a stripping gas storage tank connected between the air compressor and the mud cake processing device;

[0019] An instrument air pipe branch is arranged on the output end of the stripping gas storage tank, and an instrument air storage tank, a freeze dryer and an air source distributor are arranged in sequence on the instrument air pipe branch along the air supply direction.

[0020] Preferably, the water supply pipeline includes a second water storage tank and a squeezing water pump connected between the second water storage tank and the mud cake processing device, and the water outlet of the second water storage tank is also provided with a cleaning water pump arranged in parallel with the squeezing water pump, and the output end of the cleaning water pump is arranged on the input port of the mud cake processing device.

[0021] Preferably, the mud cake processing device comprises a plate and frame filter press and a conveyor belt located under the output port of the plate and frame filter press.

[0022] After adopting the above technical solution, the utility model has the following advantages compared with the background technology:

[0023] 1. Transport the sludge and liquid medicine to the sludge concentrator. The liquid medicine is used to neutralize the acidity and alkalinity of the sludge. According to the different types of sludge, corresponding powder is added to eliminate the polluting chemical components in the sludge, prevent the sludge from corroding the equipment, or the sludge treatment process produces secondary pollution, improve the environmental protection and practicality of the sludge in the treatment process, and then reduce the treatment cost.

[0024] 2. The sludge is initially concentrated by the sludge thickener, and then transported and stored in the first sludge storage tank. The sludge lifting pump is turned on to transport the sludge to the sludge coagulation device, and the sludge is mixed and conditioned by adding additives and conditioning agents, such as coagulants, dehydrating agents or flocculants, which are beneficial to the dehydration or coagulation of the sludge; then the sludge is transported to the mud cake treatment device using a sludge feed pump, and the sludge is made into mud cakes and transported out to complete the sludge treatment. The entire process is relatively simple and the operation complexity is relatively low, achieving the purpose of reducing the cost of sludge treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the sludge concentration and dehydration system of the utility model;

[0026] Figure 2 It is a schematic diagram of a sludge thickener of the sludge thickening and dehydration system of the utility model;

[0027] Figure 3 It is a schematic diagram of a sludge coagulation device of the sludge concentration and dehydration system of the utility model;

[0028] Figure 4 It is a schematic diagram of a mud cake processing device of a sludge concentration and dehydration system according to the utility model;

[0029] Figure 5 This is a schematic diagram of the gas pipeline of the sludge concentration and dehydration system described in the utility model.

[0030] Description of reference numerals:

[0031] 10. Sludge thickener; 11. Water supply pipeline; 12. Sludge pipeline; 13. Dosing pipeline;

[0032] 111. first water storage tank; 112. flushing water pump; 113. shower head;

[0033] 121. second sludge storage tank; 122. sludge pump; 123. second agitator;

[0034] 131. PAM dosing device; 132. Dosing pump;

[0035] 20. First sludge storage tank; 21. First agitator; 22. Sludge lifting pump;

[0036] 30. Sludge coagulation device; 31. Auxiliary agent pipeline; 32. Conditioning agent pipeline; 33. Sludge feed pump;

[0037] 311. Auxiliary agent storage tank; 312. Metering pump;

[0038] 321. Conditioning agent storage tank; 322. Measuring device; 323. Powder lifting device;

[0039] 40. Mud cake treatment device; 41. Sewage pipeline; 42. Gas pipeline; 43. Water pipeline; 44. Sludge return pipeline; 45. Plate and frame filter press; 46. Conveyor belt;

[0040] 421, air compressor; 422, blow-off air storage tank; 423, instrument air pipe branch;

[0041] 4231. Instrument gas storage tank; 4232. Freeze dryer; 4233. Gas source distributor;

[0042] 431. Second water storage tank; 432. Squeezing water pump; 433. Cleaning water pump. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0044] In addition, it should be noted that the terms "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element of the present invention must have a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0045] When an element is referred to as being “fixed to” or “disposed on” or “provided on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0046] Unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; 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 the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood according to specific circumstances.

[0047] Example

[0048] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the present embodiment provides a sludge thickening and dehydration system, including a sludge thickener 10, a first sludge storage tank 20, a sludge coagulation device 30 and a mud cake processing device 40. The sludge thickener 10 includes a water supply pipeline 11 for conveying water to itself, a sludge pipeline 12 for conveying sludge to itself, and a dosing pipeline 13 for conveying liquid medicine into the sludge pipeline 12; the first sludge storage tank 20 is connected to the output end of the sludge thickener 10, and the first sludge storage tank 20 is provided with a first agitator 21; a sludge lifting pump 22 is arranged on the pipeline between the sludge coagulation device 30 and the sludge storage tank, and an auxiliary agent pipeline 31 and a conditioning agent pipeline 32 are arranged at the input end of the sludge coagulation device 30; a sludge feed pump 33 is arranged between the input end of the mud cake treatment device 40 and the output end of the sludge coagulation device 30, and the mud cake treatment device 40 is provided with a sewage pipeline 41 for discharging sewage, a gas pipeline 42 for supplying air to itself, and a water pipeline 43 for supplying water to itself.

[0049] In this embodiment, the sludge and the liquid medicine are mixed and transported to the sludge thickener 10, which can be a belt thickener, to concentrate the sludge, and the concentrated sludge is transported to the first sludge storage tank 20 for storage, and the sewage is transported to the sewage treatment workshop for treatment. The water supply pipeline 11 can provide the required water source to the belt thickener, for example, when cleaning or flushing the belt thickener, or when water needs to be supplemented, tap water can be transported through the water supply pipeline 11 for supplementation.

[0050] Furthermore, the sludge lifting pump 22 transports the sludge to the sludge coagulation device 30, and mixes and conditions the sludge by adding additives and conditioning agents, such as coagulants, dehydrating agents or flocculants, etc., which is beneficial to the dehydration or coagulation of the sludge. In the first sludge storage tank 20, multiple first agitators 21 (the first agitators 21 can be submersible mixers) can be installed for stirring, so that the sludge lifting pump 22 can pump and improve practicality.

[0051] Finally, the sludge mixed with the additives and the conditioner is transported to the mud cake processing device 40 through the sludge feed pump 33, and the sludge is made into a mud cake. In order to improve the effect of sludge dehydration, high-pressure gas is introduced through the gas pipeline 42 to achieve the purpose of secondary compression of the sludge. The compressed sewage is then transported to the sewage treatment plant for treatment. The compressed and consolidated sludge can be transported out by vehicle. The sludge treatment is completed, the entire process is relatively simple, the operation complexity is relatively low, and the purpose of reducing the sludge treatment cost is achieved.

[0052] like Figure 1 As shown, in this embodiment, a sludge return pipe 44 is provided between the output end of the mud cake processing device 40 and the input end of the first mud storage tank 20. Specifically, after the mud cake processing device 40 has completed the operation, the water pipeline 43 can be used for cleaning or flushing, and the sludge after flushing and cleaning can be transported to the first mud storage tank 20 through the sludge return pipe 44 for recycling and treatment, so as to prevent secondary pollution or the need for manual treatment of the sludge water after cleaning, reduce the treatment cost or difficulty, and have good practicality.

[0053] like Figure 1 As shown, in this embodiment, the sludge thickener 10 is a belt thickener, and the sludge pipeline 12 includes a second sludge storage tank 121 and a sludge pump 122 for conveying the sludge in the second sludge storage tank 121 to the belt thickener; a second agitator 123 is provided in the second sludge storage tank 121, and the second agitator 123 can be a submersible agitator. A certain amount of sludge can be stored in the second sludge storage tank 121, so that the whole system can be stably operated for a long time, and at the same time, it also has a high fault tolerance rate, that is, it can meet the fluctuation of the efficiency of providing sludge at the front end, and improve practicality.

[0054] like Figure 2 As shown, in this embodiment, the water supply pipeline 11 includes a first water storage tank 111 and a flushing water pump 112 for pumping water in the first water storage tank 111 to the sludge thickener 10. The first water storage tank 111 can store a large amount of water so that the flushing water pump 112 can pump and provide stable water; at the same time, it can avoid the sudden situation of water outage, which has good practicality.

[0055] like Figure 2 As shown, in this embodiment, a plurality of shower heads 113 are provided on the water outlet end of the water supply pipe 11. The shower head 113 may be a shower-type shower head 113. Flushing through the shower head 113 can cover the internal area of ​​the sludge concentrator 10, avoid flushing dead corners or inadequate flushing, and improve practicality.

[0056] like Figure 2As shown, in this embodiment, the dosing pipeline 13 is provided with a PAM dosing device 131 (PAM is Polyacrylamide, the Chinese name is polyacrylamide) and a dosing pump 132 that transports the mixed liquid in the PAM dosing device 131 to the sludge pipeline 12. The PAM dosing device 131 is an intelligent, fully automatic, continuous, integrated flocculant dissolving and dosing device; the PAM dosing device 131 is a fully automatic, continuous configuration and dosing system for powdered polymer flocculants. That is, the dry powder flocculant enters the premixer from the screw propeller and is premixed with clean water, and the wetted material enters the configuration tank for dilution, and the corresponding liquid concentration is configured according to the manual setting. Then it can be transported by the dosing pump 132, achieving the effect of automatic dosing and reducing the difficulty of operation.

[0057] like Figure 3 As shown, in this embodiment, the auxiliary agent pipeline 31 is provided with an auxiliary agent storage tank 311 and a metering pump 312 for quantitatively transporting the fluid medium in the auxiliary agent storage tank 311 to the sludge coagulation device 30; the conditioner pipeline 32 is provided with a conditioner storage tank 321 and a metering device 322 for quantitatively transporting the fluid medium in the conditioner storage tank 321 to the sludge coagulation device 30, and a powder lifting device 323 is provided on the input end of the conditioner storage tank 321.

[0058] Specifically, in order to facilitate accurate addition of additives and conditioners, the additives are quantitatively delivered through the metering pump 312 to ensure the delivery amount and achieve the purpose of accurate delivery. Similarly, the conditioner delivered by the conditioner pipeline 32 is weighed using the meter 322, and then delivered to the sludge coagulation device 30 to achieve the effect of accurate delivery. In the conditioner storage tank 321, the powder lifting device 323 can be used to feed the material to ensure that the raw materials in the conditioner storage tank 321 are sufficient, which has good practicality.

[0059] like Figure 5 As shown, in this embodiment, the gas pipeline 42 is provided with an air compressor 421 and a stripping gas tank 422 connected between the air compressor 421 and the mud cake processing device 40; an instrument air pipe branch 423 is provided on the output end of the stripping gas tank 422, and an instrument air pipe branch 423 is provided with an instrument air tank 4231, a freeze dryer 4232 and an air source distributor 4233 in sequence along the air supply direction.

[0060] Specifically, the moisture in the compressed gas is separated by blowing off the gas storage tank 422 and stored in the instrument gas storage tank 4231. Then, after being dried by the freeze dryer 4232, the gas is transported to the mud cake processing device 40 via the gas source distributor 4233, and the sludge is subjected to secondary compression treatment to reduce the separation of some interstitial water in the sludge, reduce the volume of the sludge, and improve the sludge dehydration effect.

[0061] like Figure 4 As shown, in this embodiment, the water supply pipeline 43 includes a second water tank 431 and a squeezing water pump 432 connected between the second water tank 431 and the mud cake processing device 40. The water outlet of the second water tank 431 is also provided with a cleaning water pump 433 arranged in parallel with the squeezing water pump 432, and the output end of the cleaning water pump 433 is arranged on the input port of the mud cake processing device 40. The squeezing water pump 432 can quickly supply water, perform solid-liquid separation operations, and provide a clean water source. The cleaning water pump 433 is used to provide clean water to flush the mud cake processing device 40 to avoid sludge residue, and return to the first mud storage tank 20 through the sludge return pipe 44 to achieve circulation treatment, avoid secondary pollution, or the need for manual treatment, and reduce treatment costs.

[0062] like Figure 4 As shown, the mud cake processing device 40 in this embodiment includes a plate-frame filter press 45 and a conveyor belt 46 located under the output port of the plate-frame filter press 45. The conveyor belt 46 can be used to output the consolidated mud cake, and the mud cake can be transported out by a vehicle.

[0063] Specifically, the sludge is concentrated and dehydrated through the sludge concentration and dehydration system, so that the sludge is solidified and the water in the sludge is fully drained, that is, the pore water pressure is reduced, the sludge volume is reduced, and its water content is reduced. The water content of the sludge after concentration and dehydration can generally be reduced to about 55% to 80%, thereby achieving the purpose of reducing the sludge volume.

[0064] Sludge dehydration is to separate some of the interstitial water in the sludge by mechanical means to further reduce the volume. This process mainly removes the capillary water between the sludge particles and reduces the pore water pressure. Therefore, secondary multiple or other treatments are used, such as adding drugs to adjust the coagulation device to make the sludge better compressed and dehydrated. After concentrated and dehydrated sludge, its water content can generally be reduced to about 55% to 80%, so that it can be better transported and processed in the next step, which has good practicality.

[0065] The above is only a preferred specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A sludge concentration and dehydration system, characterized in that: include: A sludge concentrator, comprising a water supply pipeline for conveying water to the concentrator, a sludge pipeline for conveying sludge to the concentrator, and a drug adding pipeline for conveying drug solution into the sludge pipeline; A first sludge storage tank, which is connected to the output end of the sludge thickener, and a first agitator is arranged in the first sludge storage tank; A sludge coagulation device, wherein a sludge lifting pump is arranged on the pipeline between the sludge coagulation device and the sludge storage tank, and an auxiliary agent pipeline and a conditioning agent pipeline are arranged at the input end of the sludge coagulation device; and The mud cake processing device has a sludge feed pump arranged between its input end and the output end of the sludge coagulation device. The mud cake processing device is provided with a sewage pipeline for discharging sewage, a gas pipeline for supplying air to itself, and a water pipeline for supplying water to itself.

2. The sludge concentration and dehydration system according to claim 1, characterized in that: The sludge thickener is a belt thickener, and the sludge pipeline includes a second sludge storage tank and a sludge pump for transporting the sludge in the second sludge storage tank to the belt thickener; A second agitator is arranged in the second mud storage tank.

3. The sludge concentration and dehydration system according to claim 1 or 2, characterized in that: The water supply pipeline includes a first water storage tank and a flushing water pump that pumps water in the first water storage tank to the sludge concentrator.

4. The sludge concentration and dehydration system according to claim 3, characterized in that: A plurality of shower heads are arranged on the water outlet end of the water supply pipeline.

5. The sludge concentration and dehydration system according to claim 1 or 2, characterized in that: The dosing pipeline is provided with a PAM dosing device and a dosing pump for delivering the mixed liquid in the PAM dosing device to the sludge pipeline.

6. The sludge concentration and dehydration system according to claim 1, characterized in that: A sludge return pipeline is arranged between the output end of the mud cake processing device and the input end of the first mud storage tank.

7. The sludge concentration and dehydration system according to claim 1, characterized in that: The auxiliary agent pipeline is provided with an auxiliary agent storage tank and a metering pump for quantitatively transporting the fluid medium in the auxiliary agent storage tank to the sludge coagulation device; The conditioning agent pipeline is provided with a conditioning agent storage tank and a metering device for quantitatively conveying the fluid medium in the conditioning agent storage tank to the sludge coagulation device, and a powder lifting device is provided on the input end of the conditioning agent storage tank.

8. The sludge concentration and dehydration system according to claim 1, characterized in that: The gas pipeline is provided with an air compressor and a blow-off gas storage tank which is connected between the air compressor and the mud cake processing device; An instrument air pipe branch is arranged on the output end of the stripping gas storage tank, and an instrument air storage tank, a freeze dryer and an air source distributor are arranged in sequence on the instrument air pipe branch along the air supply direction.

9. The sludge concentration and dehydration system according to claim 1, characterized in that: The water supply pipeline includes a second water storage tank and a squeezing water pump connected between the second water storage tank and the mud cake processing device. The water outlet of the second water storage tank is also provided with a cleaning water pump arranged in parallel with the squeezing water pump. The output end of the cleaning water pump is arranged on the input port of the mud cake processing device.

10. The sludge concentration and dehydration system according to claim 1, characterized in that: The mud cake processing device comprises a plate and frame filter press and a conveyor belt located under the output port of the plate and frame filter press.

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