A new type of sludge thermal drying device

Abstract

The invention discloses a novel sludge thermal drying device, which relates to the technical field of sludge thermal drying. The technical scheme thereof mainly comprises a sludge dryer, a dust collector, a steam generating system, a steam boiler, a steam cylinder, a softening water system, a tail gas cooler, a circulating cooling water system, a tail gas induced draft fan, a drainage system and a wastewater cooler. The sludge containing water is fed into the sludge dryer, and the steam generating system transmits saturated steam to the steam cylinder. The effect is that the system recovers the heat of the tail gas and converts it into steam for recycling, thereby greatly reducing the consumption of primary energy and having an obvious emission reduction effect. Meanwhile, the process route is adopted, so that the sludge reduction work in the sewage treatment plant can be more cost-effective. In addition, the process route is adopted, and the sludge is reduced in the sewage treatment plant, and the sludge discharged from the factory is reduced from the original 1 ton (80% water content) to 0.33 tons (40% water content), and the transportation cost can be reduced by 67%.

Description

Technical Field

[0001] The invention relates to the technical field of sludge thermal drying, and more specifically, to a novel sludge thermal drying device. Background Art

[0002] Sludge thermal drying device is a treatment technology that uses heat medium through special processes and equipment to directly or indirectly heat sludge, evaporate all or part of the water in the sludge, thereby achieving sludge reduction, stabilization and resource utilization. The working principle of sludge thermal drying device is to evaporate the water in the sludge through heat transfer. According to the degree of drying, sludge can be divided into two types: fully dried and semi-dried. The moisture content of fully dried sludge is low, while semi-dried sludge mainly refers to the type with a moisture content of about 40%. There are many types of sludge thermal drying devices, including direct heating, indirect heating and direct / indirect combined drying. According to the equipment feeding method and product form, it can be divided into spherical granular products using a dry material backmixing system and powdered products directly fed with wet sludge.

[0003] Due to the rapid urbanization process, the municipal sludge generated by sewage treatment plants is increasing, and the reduction of sludge is imminent. Among the sludge reduction technologies, mechanical dehydration methods include plate and frame filter pressing, centrifugal dehydration, belt dehydration and other technologies. These technologies can only reduce the moisture content of sludge to between 60% and 80%. Technologies using evaporative dehydration include disc drying (indirect thermal drying) and low-temperature thermal drying (direct thermal drying). These technologies can reduce the moisture content of sludge to below 40%. Therefore, the reduction of thermal drying technology is very obvious, but due to the limitation of the heat source of sewage treatment plants, indirect thermal drying equipment is generally not built in sewage treatment plants, but in garbage incineration plants, thermal power plants, cement plants and other places with heat sources. Therefore, there is still a large amount of sludge that needs to be transported, consuming a lot of energy. Low-temperature drying uses electricity as a heat source and can be built in sewage treatment plants, but it is limited by the mud properties of sludge and the inherent technical defects of low-temperature drying, and cannot be popularized on a large scale.

[0004] However, the tail gas of the existing sludge dryer contains a large amount of heat. The current system releases the heat into the environment through the circulating water provided by the cooling tower, resulting in a waste of energy and water resources. At the same time, the existing sludge dryer requires steam as a heat source, and is usually attached to waste incineration plants, thermal power plants, cement plants and other enterprises to obtain steam, which limits the construction location of the sludge drying project. In addition, since these enterprises themselves are seasonal or have other unstable factors, the drying system cannot operate stably.

[0005] Therefore, in order to solve the above technical problems, the present application proposes a new type of sludge thermal drying device. Summary of the invention

[0006] In view of the deficiencies in the prior art, the object of the present invention is to provide a novel sludge thermal drying device.

[0007] To achieve the above object, the present invention provides the following technical solutions: a novel sludge thermal drying device, comprising a sludge dryer, a dust collector, a steam generating system, a steam boiler, a steam cylinder, a softening water system, an exhaust gas cooler, a circulating cooling water system, an exhaust gas induced draft fan, a drainage system, and a wastewater cooler;

[0008] S1: The sludge containing water is sent to the sludge dryer. The steam generation system will deliver saturated steam to the steam cylinder, and the steam cylinder will deliver saturated steam to the sludge dryer and dust collector. The sludge dryer transfers the heat in the saturated steam to the sludge through heat exchange. The water in the sludge evaporates after being heated to form a mixed gas mainly composed of water vapor, which is called dryer tail gas. The dryer tail gas contains a lot of heat;

[0009] S2: The exhaust gas generated in the sludge dryer will be transported to the dust collector through the pipeline;

[0010] S3: At the same time, the high-temperature tail gas generated in the sludge dryer is pre-treated by the dust collector and then enters the steam generation system through the connecting pipe;

[0011] S11: At the same time, the steam condensate produced by the sludge dryer and the dust collector will be sent into the drainage system through the connecting pipe;

[0012] S12: The steam condensate in the drain system will be separated and reused in the steam generation system;

[0013] S31: At the same time, after the steam generation system absorbs most of the heat in the exhaust gas, it is transported to the exhaust gas cooler through the pipeline;

[0014] S32: the tail gas in the tail gas cooler is cooled by circulating cooling water generated in the circulating cooling water system;

[0015] S33: The circulating cooling water generated by the circulating cooling water system also cools the waste water in the steam generation system;

[0016] S34: The wastewater properly treated by the wastewater cooler will be discharged to the supporting sewage treatment plant;

[0017] S35: at the same time, the exhaust gas in the exhaust gas cooler is transported to the exhaust gas induced draft fan through the pipeline;

[0018] S4: When the steam generated in the steam generation system is insufficient, the steam generated in the steam boiler will supplement the steam generation system;

[0019] S5: When there is insufficient water in the steam generation system and the steam boiler, the softened water system will deliver softened water to the steam generation system and the steam boiler.

[0020] Preferably, it preferably comprises a condenser, a condenser circulating water pump, a heat exchanger, a heat exchanger circulating water pump, a high-temperature heat pump system, an evaporator, a compressor, a steam generator, a throttling device, and a steam compressor;

[0021] S36: The high-temperature exhaust gas pre-treated by the dust collector enters the condenser in the steam generation system through the connecting pipe, and then the condenser circulating water pump provides power to transport the circulating water to the heat exchanger and condenser to form a circulation loop. The circulating water releases heat in the heat exchanger and absorbs heat in the condenser to complete the heat transfer. After the circulating water in the heat exchanger absorbs heat in the heat exchanger, it is transported to the evaporator of the high-temperature heat pump system by the heat exchanger circulating water pump and releases heat. The released heat heats and evaporates the refrigerant in the high-temperature heat pump system. The compressor compresses the refrigerant into high-temperature and high-pressure steam and transports it to the steam generator. After releasing the heat in the steam generator, the refrigerant undergoes a phase change under the action of the throttling device and continues to absorb heat in the evaporator. At the same time, the condensate sent from the drain system is heated and evaporated in the steam generator to form low-pressure saturated steam. Then the steam compressor pressurizes the low-pressure saturated steam generated from the high-temperature heat pump system to about 0.5-0.7MPa.

[0022] Preferably, the exhaust induced draft fan extracts the cooled exhaust gas and conveys it to an external deodorization device.

[0023] Preferably, the wastewater in the tail gas cooler and the steam generation system is transported to the wastewater cooler through pipelines and cooled, and the wastewater that meets the discharge requirements will be discharged to a sewage treatment plant.

[0024] Preferably, the interior of the steam boiler maintains a high pressure, and the interior of the sub-cylinder generally maintains a certain low pressure, which is used to ensure that the steam generated in the steam boiler is transported to the interior of the sub-cylinder.

[0025] Preferably, the exhaust gas in the exhaust gas cooler will be cooled to 40 to 45°C.

[0026] Preferably, the heat dissipated by the circulating water in the exhaust gas cooler entering the circulating cooling water system for cooling will be discharged into the environment.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] 1. In the present invention, the system recovers the heat of tail gas and converts it into steam for recycling, which greatly reduces the consumption of primary energy and has a significant emission reduction effect. At the same time, the process route of the system can make the sludge reduction work in the sewage treatment plant more cost-effective, and the sludge can be reduced in the sewage treatment plant. The sludge discharged from the factory is reduced from the original 1 ton (80% moisture content) to 0.33 tons (40% moisture content), and the transportation cost can be reduced by 67%. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0030] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0031] Figure 2 It is a schematic diagram of the overall structure after improvement of the present invention;

[0032] Figure 3 It is a schematic structural diagram of the steam generating system of the present invention.

[0033] 1. Sludge dryer; 2. Dust collector; 3. Steam generating system; 31. Condenser; 32. Condenser circulating water pump; 33. Heat exchanger; 34. Heat exchanger circulating water pump; 35. High temperature heat pump system; 351. Evaporator; 352. Compressor; 353. Steam generator; 354. Throttling device; 36. Steam compressor; 4. Steam boiler; 5. Cylinder; 6. Softened water system; 7. Exhaust cooler; 8. Circulating cooling water system; 9. Exhaust draft fan; 10. Drainage system; 11. Wastewater cooler. DETAILED DESCRIPTION

[0034] like Figure 1 As shown in the figure, it is the original sludge thermal drying device. The disadvantage of this device is that the exhaust gas of the sludge dryer contains a large amount of heat. The current system releases the heat into the environment through the circulating water provided by the cooling tower, which causes waste of energy and water resources. At the same time, the existing sludge dryer requires steam as a heat source, and is usually attached to waste incineration plants, thermal power plants, cement plants and other enterprises to obtain steam, which leads to the construction location of the sludge drying project being restricted. In addition, since these enterprises themselves have seasonality or other unstable factors, the drying system cannot operate stably.

[0035] like Figure 2As shown in FIG. 3 , the present invention provides a novel sludge thermal drying device, comprising a sludge dryer 1, a dust collector 2, a steam generating system 3, a steam boiler 4, a steam cylinder 5, a softening water system 6, an exhaust gas cooler 7, a circulating cooling water system 8, an exhaust gas induced draft fan 9, a drainage system 10, and a wastewater cooler 11. First, the sludge containing water is fed into the sludge dryer 1, which adopts a disc dryer. Then, the sludge containing water is fed into the disc dryer through the feed port and falls on the rotating disc. At this time, the rotation of the disc drives the sludge to form a thin sludge layer on the disc, and then the sludge is stirred. and mixing. During the stirring and mixing process, the water in the sludge gradually evaporates to achieve the drying of the sludge. The dried sludge is discharged from the disc dryer through the discharge port for subsequent treatment and disposal. The water evaporated from the sludge dryer 1 contains a large amount of heat. At the same time, the tail gas containing a large amount of heat is mixed with air in the environment and mixed substances and dust volatilized from the sludge. It is used to dry the sludge containing water, so that after the drying treatment, the volume of the sludge can be significantly reduced to a fraction of the original volume, which is convenient for transportation and final disposal, and at the same time helps to reduce environmental pollution and the risk of disease transmission;

[0036] Then the tail gas generated in the sludge dryer 1 is transported to the dust collector 2 through a pipeline, and the tail gas temperature is about 105°. At this time, the dust collector 2 is a cyclone dust collector 2, and then the centrifugal force of the cyclone dust collector 2 is used to throw the dust in the heat onto the wall of the device, and then the dust falls into the dust collecting hopper with the help of gravity, which is used to remove the dust in the tail gas of the dryer and reduce the harmful effects of the dust on the condenser. It is used to remove the dust in the tail gas of the sludge dryer 1 and reduce the harmful effects of the dust on the condenser;

[0037] At the same time, the sludge drying machine tail gas 1 at 90°C-100°C in the dust collector 2 will enter the steam generation system 3 through the connecting pipe, which is used to not only improve the energy utilization efficiency, reduce the operating cost, but also reduce environmental pollution and promote the recycling of resources;

[0038] The steam generation system 3 includes a connecting pipe and a heat exchanger. At this time, the tail gas of the sludge dryer 1 at 90°C-100°C in the dust collector 2 enters the steam generation system 3 through the connected pipe. Inside the steam generation system 3, the high-temperature tail gas quickly transfers heat to the steam condensate through efficient heat conduction materials and designs, and forms saturated steam.

[0039] At the same time, the tail gas at 50°C-60°C after passing through the steam generation system 3 will be transported to the tail gas cooler 7 through the pipeline. The tail gas cooler 7 is a shell and tube heat exchanger. The tail gas passes through the tube side and the circulating water passes through the shell side. The tail gas is cooled by indirect heat exchange. The temperature of the cooled tail gas is 40 to 45°C, which meets the operation requirements of the subsequent deodorization system. It is used to achieve not only improved energy utilization efficiency, reduced operating costs, and reduced environmental pollution, but also improved system stability and resource recycling rate, and at the same time meets the requirements of environmental protection regulations;

[0040] Then, the circulating water in the shell of the shell and tube heat exchanger is sent to the circulating cooling water system 8 after being heated. The circulating cooling water system 8 cools the circulating water in the shell through the cooling tower, and then returns to the exhaust gas cooler 7 for recycling. At this time, the heat of the circulating water in the shell is released to the environment through the cooling tower, which is used to achieve not only improved energy utilization efficiency, reduced operating costs, and reduced environmental pollution, but also improved system stability and resource recycling rate, while meeting the requirements of environmental protection regulations;

[0041] Then the wastewater discharged from the circulating cooling water system 8 will be transported to the wastewater cooler 11 through the pipeline. At this time, the wastewater cooler 11 is also a shell and tube heat exchanger. First, the wastewater discharged from the circulating cooling water system 8 enters the shell part of the wastewater cooler 11 through the inlet pipe, and then the wastewater will be diverted to multiple parallel pipes after passing through the inlet pipe. The pipe is called a cooling pipe, and then the wastewater flowing in the cooling pipe exchanges heat with the cooling medium. The cooling medium passes through the shell part of the cooler and contacts the outer surface of the cooling pipe to absorb the heat in the pipe. At this time, the heat is conducted to the cooling medium outside the pipe through the metal wall of the cooling pipe. At the same time, the heat in the fluid is also transferred to the pipe wall by convection. Finally, the cooled wastewater flows out from the outlet of the cooling pipe and is then discharged to the sewage treatment plant. At this time, the temperature of the wastewater meets the requirements for sewage discharge, and the sewage reaches a discharge temperature of 35°C to 40°C. It is used to achieve not only improved energy utilization efficiency but also met the requirements of environmental protection regulations.

[0042] At the same time, the exhaust induced draft fan 9 is started to extract the exhaust gas in the exhaust cooler 7 through the rotating impeller and transport it to the external deodorization equipment, so as to discharge the exhaust gas of the dryer out of the dryer and ensure that the dryer cavity and the dust collector 2 and condenser and other equipment maintain negative pressure, prevent the odor from overflowing the exhaust system, and obtain a good production environment;

[0043] The sludge dryer 1 generally includes components such as a hollow shaft, a disc, a steam condensate guide plate, a steam inlet pipe and a water outlet pipe. Steam enters the disc from the steam inlet pipe of the hollow shaft and exchanges heat with the sludge outside the disc. The steam condensate after heat exchange passes through the steam condensate guide plate arranged in the disc, and is quickly introduced into the hollow shaft through the water outlet pipe, and then discharged through the rotary joint condensate outlet pipe arranged at the end of the hollow shaft, and enters the drainage system 10. The condensate in the steam is separated and reused in the steam generation system 3, which is used to fully utilize the heat contained in the condensate, while reducing the replenishment of fresh water, so as to achieve the purpose of energy saving and emission reduction;

[0044] At the same time, when the sludge drying device is started for the first time, the steam boiler 4 heats water through electricity or other forms of energy, converts the water into high-temperature and high-pressure steam, and then guides the generated steam to the steam cylinder 5 through the steam delivery pipeline, so that the sludge dryer 1 completes the system startup work and establishes a cycle for system heat recovery. At this time, the steam boiler 4 acts as a startup boiler for the sludge drying system to provide heat for the sludge drying system;

[0045] At the same time, when the steam delivered by the steam generation system 3 is insufficient, the steam boiler 4 heats water through electric energy or other forms of energy, converts the water into high-temperature and high-pressure steam, and then guides the generated steam to the steam cylinder 5 through the steam delivery pipeline. At this time, the steam boiler 4 serves as a supplement to the system heat, which is used to achieve improved energy utilization efficiency, stable heating, strong flexibility, environmental protection and energy saving, and wide adaptability;

[0046] Then the steam in the steam cylinder 5 will be guided into the sludge dryer 1 and the dust collector 2 through the internal pipe and valve system. When the steam enters the sludge dryer 1, the steam and the sludge are indirectly contacted, and the water in the sludge is evaporated through heat exchange, thereby achieving the drying treatment of the sludge. At the same time, when the steam enters the dust collector 2, it can prevent the water vapor in the tail gas from condensing into liquid water, so as to improve the dust removal efficiency.

[0047] At the same time, the steam generating system 3 and the steam boiler 4 are closely connected with the steam cylinder 5 through a pipeline. Due to the difference in temperature and pressure, the steam will naturally flow from the high-pressure area to the low-pressure area. At this time, the steam cylinder 5 serves as a buffer device for the steam generated by the steam generating system 3 and the steam boiler 4, and is also a device for stably delivering steam to various gas-using points in the dryer system. Its use not only improves the safety and stability of the steam system, but also helps to save energy, reduce emissions and reduce operating costs.

[0048] At this time, the softened water system 6 acts as an independent unit. When the steam generating system 3 and the steam boiler 4 are short of water, the softened water system 6 will supplement the water source for the steam generating system 3 and the steam boiler 4, which is used to prevent scale formation, improve energy utilization efficiency, extend equipment life, reduce maintenance costs, improve steam quality, and be environmentally friendly and energy-saving.

[0049] Condenser 31, condenser circulating water pump 32, heat exchanger 33, heat exchanger circulating water pump 34, high temperature heat pump system 35, evaporator 351, compressor 352, steam generator 353, throttling device 354, steam compressor 36;

[0050] S36: The high-temperature exhaust gas after pretreatment by the dust collector 2 enters the condenser 31 in the steam generation system 3 through the connecting pipe, which is used to condense the water vapor in the exhaust gas into liquid water and enter the circulating water system together, and then performs heat exchange with the circulating cooling water at about 55°C powered by the condenser circulating water pump 32, and the exhaust gas temperature is reduced to about 60°C. It is used to achieve the cooling effect, and the circulating cooling water temperature is increased to about 70°C. The circulating water with increased temperature is transported to the heat exchanger 33 by the condenser circulating water pump 32, and performs heat exchange with the low-temperature circulating water of about 50°C from the evaporator 351. The condenser circulating water temperature is reduced to about 55°C and is sent back to the condenser 31. The circulating water from the evaporator 351 has a temperature of about 50°C, and is powered by the heat exchanger circulating water pump 34 and transported to the heat exchanger 33, and is heated to 65°C by the heat exchanger 33. Around, it returns to the evaporator 351, in the evaporator 351, the heat is transferred from the circulating water to the refrigerant, causing the refrigerant to evaporate, and then under the action of the compressor 352, the temperature of the vaporized refrigerant is increased to about 120°C and transported to the steam generator 353. In the evaporator 351, the high-temperature condensate from the drain system 10 is heated to about 115°C, and the condensate is vaporized to form saturated steam. After the refrigerant releases the heat in the steam generator 353, under the action of the throttling device 354, the refrigerant undergoes a phase change and continues to absorb heat in the evaporator 351. At the same time, usable low-pressure saturated steam is formed in the steam generator 353. The low-pressure saturated steam generated by the high-temperature heat pump system 35 is pressurized to about 0.5-0.7MPa by the steam compressor 36, which is used to meet the working requirements of the sludge dryer 1. Specific embodiment 2

[0052] First, the sludge with a moisture content of 80% is fed into the sludge dryer 1 through the feed port, and then the sludge dryer 1 is started. At this time, the started sludge dryer 1 will dry the water-containing sludge;

[0053] At the same time, the tail gas at 90℃-100℃ generated in the sludge dryer 1 will be transported into the dust collector 2 through the pipeline. At this time, the dust collector 2 will remove the dust from the tail gas at 90℃-100℃ generated in the sludge dryer 1. At the same time, when the saturated steam in the cylinder 5 enters the dust collector 2, it can prevent the water vapor in the tail gas from condensing into liquid water and reducing the dust removal efficiency.

[0054] At this time, the high-temperature exhaust gas after dust removal in the dust collector 2 will be transported to the steam generation system 3 through the pipeline. When the high-temperature exhaust gas enters the steam generation system 3, the steam from the drain system 10 will condense water in the form of heat transfer;

[0055] At the same time, the exhaust gas at 50°C-60°C in the steam generation system 3 will be transported to the exhaust gas cooler 7 by pipeline. At this time, the exhaust gas cooler 7 will cool the filtered exhaust gas, and the temperature of the cooled exhaust gas will be 40°C-45°C.

[0056] At the same time, the circulating water heated in the exhaust gas cooler 7 will be transported into the circulating cooling water system 8 through the pipeline. At this time, the circulating water temperature is 35°C-40°C. Then the circulating cooling water system 8 will cool the circulating water at a temperature of 35°C-40°C. When the circulating water at a temperature of 35°C-40°C is cooled to 30°C-32°C, the circulating water at a temperature of 30°C-32°C will be transported to the exhaust gas cooler 7 through the pipeline, so as to cool the exhaust gas at 50°C-60°C in the exhaust gas cooler again.

[0057] At the same time, the wastewater discharged from the circulating cooling water system 8 will be transported to the wastewater cooler 11 through the pipeline. At this time, the wastewater cooler 11 will cool the wastewater transported from the circulating cooling water system 8 until the wastewater temperature is cooled to 35°C to 40°C which meets the discharge requirements, and then the wastewater meeting the discharge requirements will be discharged to the sewage treatment plant;

[0058] At the same time, since the wastewater in the circulating cooling water system 8 contains a certain amount of dissolved salts and other impurities, these substances will be further concentrated during the mixing process. In order to maintain the water quality balance of the circulating cooling water system 8 and prevent scaling, corrosion and microbial growth, the system will regularly discharge a portion of the concentrated cooling water, i.e., wastewater.

[0059] At the same time, the exhaust induced draft fan 9 is started to extract the exhaust gas cooled at 40°C and transport it to the external deodorization equipment;

[0060] At the same time, when the steam delivered by the steam generation system 3 is insufficient, the water vapor generated in the steam boiler 4 is then guided to the steam sub-cylinder 5 through the steam delivery pipeline;

[0061] Then the steam stored in the steam cylinder 5 will be guided into the sludge dryer 1 and the dust collector 2;

[0062] When the steam generating system 3 and the steam boiler 4 are short of water, the softened water system 6 will supplement the water source for the steam generating system 3 and the steam boiler 4 .

[0063] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any ordinary technician in the industry can smoothly implement the present invention as shown in the drawings and described above. However, any equivalent changes, modifications and evolutions made by technicians familiar with the profession without departing from the scope of the technical solution of the present invention using the technical content disclosed above are all equivalent embodiments of the present invention. At the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the present invention are still within the protection scope of the technical solution of the present invention.

Claims

1. A novel sludge thermal drying device, comprising a sludge dryer (1), a dust collector (2), a steam generating system (3), a steam boiler (4), a steam cylinder (5), a softening water system (6), an exhaust gas cooler (7), a circulating cooling water system (8), an exhaust gas induced draft fan (9), a drainage system (10), and a wastewater cooler (11), characterized in that: S1: The sludge containing water is fed into the sludge dryer (1), the steam generating system (3) will feed saturated steam to the steam cylinder (5), the steam cylinder (5) will feed saturated steam to the sludge dryer (1) and the dust collector (2), the sludge dryer (1) transfers the heat in the saturated steam to the sludge through heat exchange, the water in the sludge evaporates after being heated, and a mixed gas mainly composed of water vapor is formed, which is called dryer tail gas, and the dryer tail gas contains a large amount of heat; S2: The tail gas generated in the sludge dryer (1) will be transported to the dust collector (2) through a pipeline; S3: At the same time, the high-temperature tail gas generated in the sludge dryer (1) is pre-treated by the dust collector (2) and then enters the steam generation system (3) through the connecting pipe; S11: At the same time, the steam condensate generated in the sludge dryer (1) and the steam condensate generated in the dust collector (2) will be sent to the drainage system (10) through the connecting pipe; S12: The steam condensate in the drain system (10) will be separated and recycled to the steam generation system (3); S31: After the steam generation system (3) absorbs most of the heat in the exhaust gas, the exhaust gas is transported to the exhaust gas cooler (7) through a pipeline; S32: the tail gas in the tail gas cooler (7) is cooled by circulating cooling water produced in the circulating cooling water system (8); S33: The circulating cooling water generated by the circulating cooling water system (8) also cools the waste water in the steam generating system (3); S34: The wastewater properly treated by the wastewater cooler (11) will be discharged to the supporting sewage treatment plant; S35: at the same time, the exhaust gas in the exhaust gas cooler (7) is transported to the exhaust gas induced draft fan (9) through a pipeline; S4: When the steam generated in the steam generating system (3) is insufficient, the steam generated in the steam boiler (4) will supplement the steam in the steam generating system (3); S5: When the water source in the steam generating system (3) and the steam boiler (4) is insufficient, the softening water system (6) will deliver softened water to the steam generating system (3) and the steam boiler (4).

2. A novel sludge thermal drying device according to claim 1, characterized in that: It includes a condenser (31), a condenser circulating water pump (32), a heat exchanger (33), a heat exchanger circulating water pump (34), a high-temperature heat pump system (35), an evaporator (351), a compressor (352), a steam generator (353), a throttling device (354), and a steam compressor (36); S36: The high-temperature exhaust gas pre-treated by the dust collector (2) enters the condenser (31) in the steam generation system (3) through the connecting pipe, and then exchanges heat with the circulating cooling water of 50°C-55°C powered by the condenser circulating water pump (32). The exhaust gas temperature is reduced to 55°C-65°C, and the circulating cooling water temperature is increased to 65°C-75°C. The circulating water with increased temperature is transported to the heat exchanger (33) by the condenser circulating water pump (32) and exchanges heat with the low-temperature circulating water of 45°C-55°C from the evaporator (351). The condenser circulating water temperature is reduced to 50°C-60°C and is sent back to the condenser (31). The circulating water of 45°C-55°C from the evaporator (351) is powered by the heat exchanger circulating water pump (34) and is transported to the heat exchanger (33). It is heated to 60°C-70°C by the heat exchanger (33) and returns to the evaporator. (351), in the evaporator (351), heat is transferred from the circulating water to the refrigerant, causing the refrigerant to evaporate, and then under the action of the compressor (352), the temperature of the vaporized refrigerant is increased to 115°C-125°C and transported to the steam generator (353). In the evaporator (351), the high-temperature condensate from the drain system (10) is heated to 110°C-120°C and vaporized to form saturated steam. After the refrigerant releases heat in the steam generator (353), the working fluid undergoes a phase change under the action of the throttling device (354) and continues to absorb heat in the evaporator (351). At the same time, usable low-pressure saturated steam is formed in the steam generator (353). The low-pressure saturated steam generated from the high-temperature heat pump system (35) is pressurized to 0.5MPa-0.7MPa through the steam compressor (36).

3. A novel sludge thermal drying device according to claim 1, characterized in that: The exhaust gas induced draft fan (9) extracts the cooled exhaust gas and transports it to an external deodorizing device.

4. A novel sludge thermal drying device according to claim 1, characterized in that: The waste water in the tail gas cooler (7) and the steam generation system (3) is transported to the waste water cooler (11) through a pipeline and cooled, and the waste water meeting the discharge requirements is discharged to a sewage treatment plant.

5. The novel sludge thermal drying device according to claim 1 is characterized in that: The interior of the steam boiler (4) is maintained at a high pressure, and the interior of the steam sub-cylinder (5) is usually maintained at a certain low pressure, which is used to ensure that the steam generated in the steam boiler (4) is transported to the interior of the steam sub-cylinder (5).

6. A novel sludge thermal drying device according to claim 1, characterized in that: The exhaust gas in the exhaust gas cooler (7) will be cooled to 40 to 45°C.

7. The novel sludge thermal drying device according to claim 1 is characterized in that: The circulating water in the exhaust gas cooler (7) enters the circulating cooling water system (8) for cooling, and the heat dissipated will be discharged into the environment.

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