Method and system for comprehensive treatment of urban sewage containing mud

Abstract

A kind of urban sludge-containing sewage comprehensive treatment method and treatment system, solve the problems of low-cost high-efficiency sludge dewatering and sewage treatment, the treatment method is: sludge-containing sewage is stirred, mixed, precipitated with carbon tetrachloride liquid in displacement reaction tank, and forms water layer and carbon tetrachloride liquid and sludge mixed layer, overflowed water, carbon tetrachloride and sludge vaporization separation to remove organic water and dry sludge, carbon tetrachloride recycling is used.The treatment system scheme is: the system includes: displacement dewatering and organic matter processing part consisting of displacement reaction tank, water treatment part consisting of water intermediate tank and adsorption tower and displacement agent condensing tower consisting of displacement agent recovery part and heating station part.The beneficial effects of the present application are: simple process, safe and reliable, the treatment efficiency is increased by more than 10 times, the cost is reduced by 85%, the moisture content of sludge displacement dewatering is less than 5%, sludge displacement dewatering and sewage organic matter inactivation treatment are completed at the same time.

Description

Technical Field

[0001] This invention relates to the field of environmental protection, and in particular to a comprehensive treatment method and system for urban sewage containing sludge. Background Technology

[0002] With urban development and rapid population growth, the dewatering and reuse of sludge from domestic and industrial wastewater, as well as from urban landscape rivers and lakes, are pressing technical problems for modern cities. Current technologies require sludge dewatering before wastewater treatment, typically using plate and frame presses. The resulting sludge is then incinerated, and the wastewater is purified. However, the technology reaches a technical bottleneck when the sludge moisture content reaches 40%. Plate and frame press dewatering and subsequent sludge incineration consume significant amounts of energy, resulting in high equipment investment, low production efficiency, increased treatment costs, large site requirements, and secondary environmental pollution. Summary of the Invention

[0003] This invention addresses the technical problems associated with plate and frame presses for dewatering muddy wastewater, including the incineration of the resulting sludge and the subsequent purification of the wastewater. These problems lead to high energy consumption, large equipment investment, low production efficiency, high treatment costs, large site requirements, and secondary environmental pollution. This invention discloses a comprehensive treatment method and system for urban muddy wastewater.

[0004] The technical solution adopted by the present invention for the comprehensive treatment of urban sludge-containing wastewater is as follows:

[0005] A comprehensive treatment method for urban sludge-containing wastewater includes: sludge dewatering and organic matter treatment of the wastewater.

[0006] Step 1. Filter the muddy wastewater to remove large particulate impurities from the urban sewage;

[0007] Step 2. After stirring, mixing, and settling the sludge-containing wastewater filtered in Step 1 with carbon tetrachloride liquid in the displacement reaction tank, the following layers are generated from top to bottom in the displacement reaction tank: a layer of water with organic matter removed, a layer of carbon tetrachloride liquid containing organic matter, and a mixed layer of carbon tetrachloride liquid containing organic matter and sludge.

[0008] Step 3. Overflow the greywater layer generated in the displacement reaction tank in Step 2 to remove the greywater. The remaining layers in the displacement reaction tank are a mixture of carbon tetrachloride liquid containing organic matter, carbon tetrachloride liquid containing organic matter, and sludge.

[0009] Step 4. Heat the remaining carbon tetrachloride liquid layer containing organic matter, the mixed layer of carbon tetrachloride liquid containing organic matter and sludge in the displacement reaction tank to raise the temperature of the displacement reaction tank to the vaporization temperature of carbon tetrachloride liquid at 60-80°C, so that all the carbon tetrachloride liquid in the displacement reaction tank is vaporized.

[0010] Step 5. The vaporized carbon tetrachloride generated in the displacement reaction tank is collected by a blower. After cooling, the carbon tetrachloride returns to a liquid state and is stored in the carbon tetrachloride raw material tank for recycling.

[0011] Step 6. Discharge the mixture of remaining anhydrous sludge and carbon tetrachloride-inactivated organic matter from the displacement reaction tank.

[0012] The technical solution adopted by the present invention for the comprehensive treatment system of urban sludge-containing wastewater is as follows:

[0013] A comprehensive treatment system for urban sludge-containing wastewater includes: a displacement dewatering and organic matter treatment section, a greywater treatment section, a displacement agent recovery section, a displacement agent feeding section, a displacement agent raw material tank, and a heating station section.

[0014] The displacement dehydration and organic matter treatment section includes: a displacement reaction tank, the upper part of which is provided with a displacement agent inlet, a displacement agent receiving inlet, a greywater overflow outlet and a muddy wastewater inlet communicating with the inner cavity of the reaction tank; the displacement agent inlet is connected to the displacement agent raw material tank pipeline via a displacement agent feeding pump; the displacement agent receiving inlet is connected to the displacement agent recovery section pipeline via a displacement agent receiving blower; the greywater overflow outlet is connected to the greywater treatment section pipeline via a greywater overflow valve; a heating water jacket is also provided on the outer wall of the displacement reaction tank; the inner cavity of the heating water jacket is connected to the heating station section pipeline via a water jacket heating pump.

[0015] The greywater treatment section includes: a greywater intermediate tank, an adsorption tower, and a greywater tank. The upper part of the greywater intermediate tank is provided with a greywater inlet and a greywater outlet, and the bottom of the greywater intermediate tank is provided with a displacement agent discharge outlet. The greywater inlet is connected to the greywater overflow valve pipeline in the displacement dehydration and organic matter treatment section. The greywater outlet is connected to the adsorption tower inlet pipeline of the adsorption tower via a greywater pump. The displacement agent outlet of the adsorption tower is connected to the displacement agent collection port pipeline in the displacement dehydration and organic matter treatment section. The adsorption tower greywater outlet is connected to the greywater tank pipeline via an outlet valve. The hot air inlet of the adsorption tower is connected to a section of the heating station pipeline.

[0016] The displacement agent recovery section includes: a displacement agent condenser tower, the bottom of which is connected to the displacement agent raw material tank pipeline via a raw material tank receiving valve; the gaseous displacement agent inlet of the displacement agent condenser tower is connected to the displacement agent receiving fan pipeline in the displacement dehydration and organic matter treatment section; and the overflow port of the gaseous displacement agent in the displacement agent condenser tower is connected to the air inlet pipeline of the displacement agent receiving fan in the displacement dehydration and organic matter treatment section via a displacement agent overflow valve.

[0017] The beneficial effects of this invention are: the process is simple, safe and reliable, the treatment efficiency is increased by more than 10 times, the cost is reduced by 85%, the moisture content of the sludge after replacement and dewatering reaches less than 5%, and the sludge replacement and dewatering and the inactivation treatment of organic matter in the sewage are completed simultaneously.

[0018] The present invention will now be described in detail with reference to the accompanying drawings. Attached Figure Description

[0019] The attached figure is a schematic diagram of the integrated processing system of the present invention.

[0020] In the attached diagram, 1. Displacement reaction tank; 1-1. Displacement agent inlet; 1-2. Displacement agent receiving inlet; 1-3. Wastewater overflow outlet; 1-4. Dry sludge outlet; 1-5. Displacement agent feeding pump; 1-6. Displacement agent receiving blower; 1-7. Wastewater overflow valve; 1-8. Heating water jacket; 1-9. Water jacket heating pump; 1-10. Agitator assembly; 1-11. Sludge agitator assembly; 1-12. Ultrasonic vibrator; 1-13. Sludge-containing wastewater inlet; 2. Displacement agent raw material tank; 2-1 Raw material tank receiving valve; 3-1. Wastewater intermediate tank; 3-11 3-12. Water inlet, 3-13. Water outlet, 3-24. Displacement agent discharge, 3-25. Adsorption tower, 3-26. Displacement agent outlet, 3-27. Water outlet valve, 3-28. Hot air inlet, 3-29. Water outlet of adsorption tower, 3-20. Water inlet of adsorption tower, 3-21. Water inlet of adsorption tower, 3-22. Water tank, 3-3. Water pump, 4-1. Displacement agent condensation tower, 4-11. Gaseous displacement agent inlet, 4-12. Overflow port of gaseous displacement agent, 4-13. Water seal assembly of gaseous displacement agent, 4-14. Overflow valve, 5. Heating station section, 5-1. Waste heat fan. Detailed Implementation

[0021] A comprehensive treatment method for urban sludge-containing wastewater includes: sludge dewatering and organic matter treatment of the wastewater.

[0022] Step 1. Filter the muddy wastewater to remove large particulate impurities from the urban sewage.

[0023] The purpose of this step is to remove large pieces of floating debris, metal, stones, etc.

[0024] Step 2. After stirring, mixing, and settling the sludge-containing wastewater filtered in Step 1 with carbon tetrachloride liquid in a displacement reaction tank, the following layers are generated from top to bottom in the displacement reaction tank: a layer of water with organic matter removed, a layer of carbon tetrachloride liquid containing organic matter, a mixed layer of carbon tetrachloride liquid containing organic matter and sludge.

[0025] In this step, the volume of carbon tetrachloride solution used is larger than that of the sludge-containing wastewater. Since the specific gravity of carbon tetrachloride solution is greater than that of water, the water in the sludge-containing wastewater is replaced by carbon tetrachloride solution and floats on the surface of carbon tetrachloride solution. At the same time, the organic matter in the sludge-containing wastewater is dissolved by carbon tetrachloride solution, and the cell walls are broken and the cell water in the organic matter is replaced. While the cell walls are broken and dehydrated, the cells are inactivated, sterilized, and deodorized.

[0026] Step 3. Overflow the greywater layer generated in the displacement reactor in Step 2 to remove the greywater. The displacement reactor will then contain a mixed layer of carbon tetrachloride liquid containing organic matter, carbon tetrachloride liquid containing organic matter, and sludge.

[0027] In this step, due to the chemical property that carbon tetrachloride solution is insoluble in water, the boundary between the water layer for removing organic matter and the carbon tetrachloride liquid layer containing organic matter is clear. The water layer for removing organic matter can be separated from the displacement reaction vessel by overflow.

[0028] Step 4. Heat the remaining carbon tetrachloride liquid layer containing organic matter, the mixed layer of carbon tetrachloride liquid containing organic matter and sludge in the displacement reaction tank to raise the temperature of the displacement reaction tank to the vaporization temperature of carbon tetrachloride liquid at 60-80°C, so that all the carbon tetrachloride liquid in the displacement reaction tank is vaporized.

[0029] Step 5. The vaporized carbon tetrachloride generated in the displacement reaction tank is collected by a blower. After cooling, the carbon tetrachloride returns to a liquid state and is stored in a carbon tetrachloride raw material tank for recycling.

[0030] In this step, as the liquid carbon tetrachloride is completely converted into gaseous carbon tetrachloride, it is collected by the blower into the carbon tetrachloride raw material tank for recycling.

[0031] In this embodiment of the invention, a negative pressure fan is used to further reduce the pressure inside the displacement reaction tank, further reduce the vaporization temperature of carbon tetrachloride, and shorten the processing time while saving energy consumption.

[0032] Step 6. Discharge the mixture of remaining anhydrous sludge and carbon tetrachloride-inactivated organic matter from the displacement reaction tank.

[0033] In this embodiment of the invention, carbon tetrachloride residue in the wastewater obtained from overflow treatment is subjected to carbon adsorption treatment to obtain wastewater with carbon tetrachloride residue removed and carbon adsorbent containing carbon tetrachloride. The carbon adsorbent containing carbon tetrachloride is heated to 60-80°C to vaporize the carbon tetrachloride liquid. The vaporized carbon tetrachloride is collected by a fan. After cooling, the carbon tetrachloride returns to a liquid state and is stored in a carbon tetrachloride raw material tank for recycling.

[0034] The purpose of carbon adsorption treatment on the residual carbon tetrachloride in the wastewater obtained from overflow treatment is 1) to further purify the wastewater, while recovering the residual carbon tetrachloride for recycling, reducing carbon tetrachloride loss and lowering treatment costs.

[0035] In this embodiment of the invention, in step 5 of the method, the vaporized carbon tetrachloride generated in the displacement reaction tank is collected by a blower, and the blower is a negative pressure blower.

[0036] The above-mentioned treatment method adopted in this invention is simple in process. The energy consumption of carbon tetrachloride vaporization is only 1 / 16 of that of water vaporization, and the time of carbon tetrachloride vaporization is only 1 / 3 of that of water vaporization. Moreover, the obtained dry sludge does not need to be incinerated and can be used directly for planting.

[0037] The processing cost of this invention is only 1 / 10 of the cost of existing treatment methods that involve plate and frame dewatering and incineration of sludge with a moisture content of 40%. It is particularly suitable for the dewatering and wastewater treatment of sludge generated from urban domestic and industrial wastewater, as well as from urban landscape rivers and lakes. The generated sludge has a moisture content of less than 5%, and the wastewater meets the standards for reclaimed water.

[0038] A comprehensive treatment system for urban sludge-containing wastewater includes: a displacement dewatering and organic matter treatment section, a greywater treatment section, a displacement agent recovery section, a displacement agent feeding section, a displacement agent raw material tank, and a heating station section.

[0039] The integrated treatment system for sludge-containing wastewater in this city is designed based on the process route and process theory of the aforementioned integrated treatment method.

[0040] The displacement dehydration and organic matter treatment section includes: a displacement reaction tank 1, the upper part of which is provided with a displacement agent inlet 1-1, a displacement agent receiving inlet 1-2, a greywater overflow inlet 1-3, and a muddy wastewater inlet 1-13 communicating with the inner cavity of the reaction tank. The displacement agent inlet 1-1 is connected to the displacement agent raw material tank 2 via a displacement agent feeding pump 1-5. The displacement agent receiving inlet 1-2 is connected to the displacement agent recovery section via a displacement agent receiving fan 1-6. The greywater overflow inlet 1-3 is connected to the greywater treatment section via a greywater overflow valve 1-7. A heating water jacket 1-8 is also provided on the outer wall of the displacement reaction tank 1. The inner cavity of the heating water jacket 1-8 is connected to the heating station section 5 via a water jacket heating pump 1-9.

[0041] During use, close the displacing agent receiving fan 1-6, the greywater overflow valve 1-7, and the dry sludge discharge port 1-4. The sludge-containing wastewater enters the inner cavity of the displacement reaction tank 1 through the sludge-containing wastewater inlet 1-13 and the displacing agent in the raw material tank 2 through the displacing agent feeding pump 1-5 and the displacing agent inlet 1-1. After the sludge-containing wastewater and displacing agent are fed, close the sludge-containing wastewater inlet 1-13 and the displacing agent feeding pump 1-5. The displacing agent performs displacement separation and dissolution of organic matter in the sludge and wastewater, generating the following layers from top to bottom in the displacement reaction tank 1: a greywater layer with removed organic matter, a liquid layer of displacing agent containing organic matter, and a mixed layer of displacing agent liquid containing organic matter and sludge.

[0042] Open the greywater overflow valve 1-7, and the greywater, after removing organic matter, enters the greywater treatment section through the greywater overflow port 1-3 for further treatment of the greywater overflowing from the displacement reaction tank 1. This treatment addresses the residual displacement agent contained in the greywater overflowing from the displacement reaction tank 1.

[0043] After the reclaimed water containing organic matter is discharged through the overflow outlet 1-3, the overflow outlet 1-3 is closed. The water jacket heating pump 1-9 is turned on. The hot water or steam generated by the heating station section 5 is heated through the heating water jacket 1-8 to raise the temperature of the mixture of organic matter-containing displacement agent liquid and sludge in the displacement reaction tank 1. The displacement agent begins to vaporize. The displacement agent collection fan 1-6 is turned on, and the vaporized displacement agent is sent to the displacement agent recovery section through the displacement agent collection fan 1-6. This continues until all the displacement agent has vaporized and been sent to the displacement agent recovery section. Then, the displacement agent collection fan 1-6 is turned off, and the dry sludge outlet 1-4 is opened to remove the dry sludge from the displacement reaction tank 1. The moisture content of the dry sludge is below 5%. This completes one cycle of displacement dewatering and organic matter treatment of sludge-containing wastewater. The next cycle of the above process begins.

[0044] The greywater treatment section includes: a greywater intermediate tank 3-1, an adsorption tower 3-2, and a greywater tank 3-3. The upper part of the greywater intermediate tank 3-1 is provided with a greywater inlet 3-11 and a greywater outlet 3-12, and the bottom of the greywater intermediate tank 3-1 is provided with a displacement agent discharge outlet 3-13. The greywater inlet 3-11 is connected to the greywater overflow valve 1-7 in the displacement dehydration and organic matter treatment section. The greywater outlet 3-12 is connected to the adsorption tower inlet 3-26 of the adsorption tower 3-2 via a greywater pump 3-4. The displacement agent outlet 3-22 of the adsorption tower 3-2 is connected to the displacement agent collection outlet 1-2 in the displacement dehydration and organic matter treatment section. The adsorption tower greywater outlet 3-25 of the adsorption tower 3-2 is connected to the greywater tank 3-3 via a water outlet valve 3-23. The hot air inlet 3-24 of the adsorption tower 3-2 is connected to the heating station section 5 via a pipeline.

[0045] During operation, the reclaimed water overflowing from the overflow port 1-3 enters the intermediate reclaimed water tank 3-1 through the reclaimed water inlet 3-11. Part of the displacing agent in the reclaimed water falls to the bottom of the intermediate reclaimed water tank 3-1 and enters the displacing agent raw material tank 2 through the displacing agent discharge port 3-13. The reclaimed water at the top of the intermediate reclaimed water tank 3-1 enters the adsorption tower 3-2 through the reclaimed water outlet 3-12 and the reclaimed water pump 3-4 to adsorb the displacing agent, and then enters the reclaimed water tank 3-3 through the reclaimed water outlet 3-25 and the outlet valve 3-23. When the adsorption tower 3-2 is saturated with the adsorbed displacing agent, the heating station section 5 is activated to heat the adsorption tower 3-2, vaporizing the adsorbed displacing agent. The vaporized displacing agent is then sent to the displacing agent recovery section by the displacing agent collection fan 1-6.

[0046] The displacement agent recovery section includes: a displacement agent condenser tower 4-1, the bottom of which is connected to the displacement agent raw material tank 2 via a raw material tank receiving valve 2-1; the gaseous displacement agent inlet 4-11 of the displacement agent condenser tower 4-1 is connected to the displacement agent receiving fan 1-6 in the displacement dehydration and organic matter treatment section via a pipeline; and the gaseous displacement agent overflow port 4-12 of the displacement agent condenser tower 4-1 is connected to the air inlet pipe of the displacement agent receiving fan 1-6 in the displacement dehydration and organic matter treatment section via a displacement agent overflow valve 4-14.

[0047] When in use, the displacer in the displacer condenser 4-1 is cooled into a liquid displacer, which then enters the displacer raw material tank 2 through the raw material tank receiving valve 2-1.

[0048] Part of the gaseous displacer in the displacer condenser 4-1 is sent to the air inlet of the displacer receiving fan 1-6 via the overflow valve 4-14 for the next round of cooling.

[0049] In this embodiment of the invention, to accelerate displacement dehydration, a stirring auger assembly 1-10 is provided in the upper part of the inner cavity of the displacement reaction tank 1 in the displacement dehydration and organic matter treatment section. The stirring auger assembly 1-10 stirs the muddy wastewater and displacement agent in the displacement reaction tank 1.

[0050] In this embodiment of the invention, to facilitate the vaporization of the displacement agent and the discharge of dry sludge, a sludge auger assembly 1-11 is provided at the bottom of the inner cavity of the displacement reaction tank 1 in the displacement dewatering and organic matter treatment section. When the sludge auger assembly 1-11 rotates in the forward direction, the sludge at the bottom of the displacement reaction tank 1 churns upward, which is conducive to the vaporization of the displacement agent in the sludge. When the sludge auger assembly 1-11 rotates in the reverse direction, it pushes the dry sludge out through the dry sludge discharge port 1-4.

[0051] In this embodiment of the invention, to accelerate displacement dehydration, a set of ultrasonic vibration rods 1-12 are installed in the inner cavity of the displacement reaction tank 1 of the displacement dehydration and organic matter treatment section. The ultrasonic vibration rods 1-12 cause the muddy wastewater and the displacement agent to vibrate, thereby accelerating displacement dehydration.

[0052] In this embodiment of the invention, in order to maintain constant pressure in the displacement agent condensation tower 4-1, a gaseous displacement agent water seal assembly 4-13 is provided on the displacement agent condensation tower 4-1 in the displacement agent recovery section, and the gaseous displacement agent water seal assembly 4-13 is connected to the inner cavity of the displacement agent condensation tower 4-1.

[0053] In this embodiment of the invention, in order to improve the thermal energy utilization rate and reduce costs, the heating station section 5 is a hot water boiler. The hot water or hot steam outlet of the hot water boiler is connected to the water jacket heating pump 1-9 in the displacement dehydration and organic matter treatment section. The waste heat gas outlet of the hot water boiler is connected to the inner cavity pipeline of the adsorption tower 3-2 via the waste heat fan 5-1.

Claims

1. A comprehensive treatment method for urban sludge-containing wastewater, the method comprising: The method for sludge dewatering and wastewater organic matter treatment is characterized by the following steps: Step 1. Filter the muddy wastewater to remove large particulate impurities from the urban sewage; Step 2. After stirring, mixing, and settling the sludge-containing wastewater filtered in Step 1 with carbon tetrachloride liquid in the displacement reaction tank, the following layers are generated from top to bottom in the displacement reaction tank: a layer of water with organic matter removed, a layer of carbon tetrachloride liquid containing organic matter, and a mixed layer of carbon tetrachloride liquid containing organic matter and sludge. Step 3. Overflow the greywater layer generated in the displacement reaction tank in Step 2 to remove the greywater. The remaining layers in the displacement reaction tank are a mixture of carbon tetrachloride liquid containing organic matter, carbon tetrachloride liquid containing organic matter, and sludge. Step 4. Heat the remaining carbon tetrachloride liquid layer containing organic matter, the mixed layer of carbon tetrachloride liquid containing organic matter and sludge in the displacement reaction tank to raise the temperature of the displacement reaction tank to the vaporization temperature of carbon tetrachloride liquid at 60-80°C, so that all the carbon tetrachloride liquid in the displacement reaction tank is vaporized. Step 5. The vaporized carbon tetrachloride generated in the displacement reaction tank is collected by a blower. After cooling, the carbon tetrachloride returns to a liquid state and is stored in the carbon tetrachloride raw material tank for recycling. Step 6. Discharge the mixture of remaining anhydrous sludge and carbon tetrachloride-inactivated organic matter from the displacement reaction tank.

2. The comprehensive treatment method for urban sludge-containing wastewater according to claim 1, characterized in that: In step 3 of this method, the residual carbon tetrachloride in the wastewater obtained from the overflow treatment is subjected to carbon adsorption treatment to obtain wastewater with carbon tetrachloride residue removed and carbon adsorbent containing carbon tetrachloride. The carbon adsorbent containing carbon tetrachloride is heated to 60-80° to vaporize the carbon tetrachloride liquid. The vaporized carbon tetrachloride is collected by a fan. After cooling, the carbon tetrachloride returns to a liquid state and is stored in a carbon tetrachloride raw material tank for recycling.

3. A comprehensive treatment method for urban sludge-containing wastewater according to claim 1 or 2, characterized in that: In step 5 of this method, the vaporized carbon tetrachloride generated in the displacement reaction tank is collected by a blower, which is a negative pressure blower.

4. A comprehensive treatment system for urban sludge-containing wastewater, the system comprising: The system comprises a displacement dehydration and organic matter treatment section, a greywater treatment section, a displacement agent recovery section, a displacement agent feeding section, a displacement agent raw material tank, and a heating station section, characterized in that: The displacement dehydration and organic matter treatment section includes: a displacement reaction tank (1), the upper part of which is provided with a displacement agent inlet (1-1), a displacement agent receiving port (1-2), a greywater overflow port (1-3) and a muddy wastewater inlet (1-13) communicating with the inner cavity of the reaction tank; the displacement agent inlet (1-1) is connected to the displacement agent raw material tank (2) via a displacement agent feeding pump (1-5); the displacement agent receiving port (1-2) is connected to the displacement agent recovery section via a displacement agent receiving fan (1-6); the greywater overflow port (1-3) is connected to the greywater treatment section via a greywater overflow valve (1-7); a heating water jacket (1-8) is also provided on the outer wall of the displacement reaction tank (1); the inner cavity of the heating water jacket (1-8) is connected to the heating station section (5) via a water jacket heating pump (1-9); The greywater treatment section includes: a greywater intermediate tank (3-1), an adsorption tower (3-2), and a greywater tank (3-3). The intermediate tank (3-1) has a greywater inlet (3-11) and a greywater outlet (3-12) at its upper part, and a displacement agent discharge outlet (3-13) at its bottom. The greywater inlet (3-11) is connected to the greywater overflow valve (1-7) in the displacement dehydration and organic matter treatment section. The greywater outlet (3-12)... The adsorption tower inlet (3-26) of the adsorption tower (3-2) is connected to the water pump (3-4) via the pipeline. The displacer outlet (3-22) of the adsorption tower (3-2) is connected to the displacer receiving outlet (1-2) in the displacer dehydration and organic matter treatment section via the pipeline. The water outlet (3-25) of the adsorption tower (3-2) is connected to the water tank (3-3) via the water outlet valve (3-23) via the pipeline. The hot air inlet (3-24) of the adsorption tower (3-2) is connected to the heating station section (5) via the pipeline. The displacement agent recovery section includes: a displacement agent condenser tower (4-1), the bottom of which is connected to the displacement agent raw material tank (2) via a raw material tank receiving valve (2-1), the gaseous displacement agent inlet (4-11) of the displacement agent condenser tower (4-1) is connected to the displacement agent receiving fan (1-6) in the displacement dehydration and organic matter treatment section via a pipeline, and the overflow port (4-12) of the gaseous displacement agent in the displacement agent condenser tower (4-1) is connected to the air inlet pipe of the displacement agent receiving fan (1-6) in the displacement dehydration and organic matter treatment section via a displacement agent overflow valve (4-14).

5. The integrated treatment system for urban sludge-containing wastewater according to claim 4, characterized in that: In the upper part of the inner cavity of the displacement reaction tank (1) of the displacement dehydration and organic matter treatment section, a stirring screw assembly (1-10) is provided.

6. A comprehensive treatment system for urban sludge-containing wastewater according to claim 4 or 5, characterized in that: The bottom of the inner cavity of the displacement reaction tank (1) of the displacement dewatering and organic matter treatment section is provided with a sludge screw conveyor assembly (1-11).

7. The integrated treatment system for urban sludge-containing wastewater according to claim 4, characterized in that: A set of ultrasonic vibration rods (1-12) are installed in the inner cavity of the displacement reaction vessel (1) of the displacement dehydration and organic matter treatment section.

8. The integrated treatment system for urban sludge-containing wastewater according to claim 4, characterized in that: The gaseous displacer water seal assembly (4-13) is provided on the displacer condenser tower (4-1) in the displacer recovery section, and the gaseous displacer water seal assembly (4-13) is connected to the inner cavity of the displacer condenser tower (4-1).

9. A comprehensive treatment system for urban sludge-containing wastewater according to claim 4, characterized in that: The heating station section (5) is a hot water boiler. The hot water outlet of the hot water boiler is connected to the water jacket heating pump (1-9) in the displacement dehydration and organic matter treatment section. The waste heat gas outlet of the hot water boiler is connected to the inner cavity pipeline of the adsorption tower (3-2) via the waste heat fan (5-1).

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