High-temperature flue gas recycling system and cracking reduction treatment equipment

Abstract

The utility model discloses a high-temperature flue gas recycling system and cracking reduction treatment equipment, the system comprises a lithium bromide refrigeration device, a cooling device, a dust removal device, a deodorization device, a chimney and a water supply device, the lithium bromide refrigeration device is provided with a gas inlet, a gas outlet and a water outlet; the gas inlet is connected with a flue gas outlet of cracking reduction reaction equipment through a pipeline, the gas outlet is connected to the dust removal device through a pipeline, the dust removal device is connected with the deodorization device through a pipeline, the deodorization device is connected to a chimney through a pipeline, and the cooling device is used for cooling the cracking reduction reaction equipment. And the water outlet is respectively connected to the cooling device and the water supply device through pipelines. The waste heat of the high-temperature flue gas can be fully utilized and is discharged after being reasonably and effectively treated, and pollution-free discharge is achieved while resources are reasonably utilized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of flue gas recovery system, and particularly relates to a high-temperature flue gas recovery system and a pyrolysis reduction treatment equipment. BACKGROUND

[0002] With the acceleration of urbanization, the treatment of household garbage has become an important problem to be solved. Pyrolysis treatment, as an ideal garbage treatment method in theory, aims to convert household garbage into resource materials while avoiding secondary pollution to the atmospheric environment or excessive energy consumption. However, although pyrolysis treatment is highly praised in theory, it still faces many challenges in practical application, such as improper condition control leading to unsatisfactory pyrolysis effect, and the actual operation of the equipment being closer to stewing or incineration rather than real pyrolysis. In addition, the flue gas released after the combustion of the combustible gas generated in the pyrolysis process, although it meets the emission standard after cooling and dust removal treatment, still carries a large amount of unused heat, causing waste of resources. CONTENT OF THE UTILITY MODEL

[0003] The purpose of the embodiment of the present application is to provide a high-temperature flue gas recovery system, which can fully utilize the high-temperature flue gas waste heat and discharge it after reasonable and effective treatment, thereby reasonably utilizing resources and realizing pollution-free discharge.

[0004] In order to achieve the above purpose, the technical scheme adopted by the present application is as follows:

[0005] On the one hand, a high-temperature flue gas recovery system is provided, which comprises a lithium bromide refrigeration device, a cooling device, a dust removal device, a deodorization device, a chimney and a water supply device. The lithium bromide refrigeration device has an air inlet, an air outlet and a water outlet. The air inlet is connected to the flue gas outlet of a pyrolysis reduction reaction equipment through a pipeline. The air outlet is connected to the dust removal device through a pipeline. The dust removal device is connected to the deodorization device through a pipeline. The deodorization device is connected to the chimney through a pipeline. The cooling device is used for cooling the pyrolysis reduction reaction equipment. The water outlet is connected to the cooling device and the water supply device through a pipeline respectively.

[0006] Further, the dust removal device comprises a cyclone dust collector and a pulse dust collector. The inlet end of the cyclone dust collector is connected to the air outlet. The outlet end of the cyclone dust collector is connected to the inlet end of the pulse dust collector. The outlet end of the pulse dust collector is connected to the deodorization device.

[0007] Further, a spraying assembly is arranged in the cyclone dust collector. The spraying assembly sprays water towards the inner wall of the cyclone dust collector, so that the inner wall of the cyclone dust collector is always in a wet state.

[0008] Further, the water outlet is connected to a heat exchange region in the pyrolysis reduction reaction device through a pipeline, and the heat exchange region comprises a first condensing device for condensing gaseous phase products and a second condensing device for condensing solid phase products.

[0009] Further, a four-way valve is further included, and the four-way valve comprises a main valve port and three branch valve ports in communication with the main valve port, the main valve port is connected to the water outlet through a first water pipe, and the three branch valve ports are respectively connected to the cooling device, the first condensing device and the second condensing device through pipelines.

[0010] Further, the water supply device is connected to the water outlet through a second water pipe, and an electronic valve is arranged on the second water pipe.

[0011] Further, the water supply device comprises a hot water part and a cold water part.

[0012] Further, the deodorizing device comprises a primary deodorizing tower and a secondary deodorizing tower, the inlet end of the primary deodorizing tower is connected to the outlet end of the dust removal device, the outlet end of the primary deodorizing tower is connected to the inlet end of the secondary deodorizing tower, and the outlet end of the secondary deodorizing tower is connected to the chimney.

[0013] Further, the primary deodorizing tower and the secondary deodorizing tower each comprise a spray tower and a liquid collecting tank arranged inside the spray tower, and the liquid collecting tank is used for storing deodorizing liquid.

[0014] In another aspect, a pyrolysis reduction treatment device is also provided, comprising a heating device and the high-temperature flue gas recycling system as described above, and the flue gas outlet of the heating device is connected to the gas inlet.

[0015] The application has the beneficial effect of providing an efficient high-temperature flue gas recycling system to address the challenges faced by municipal solid waste treatment in the process of urbanization, especially the waste of high-temperature flue gas resources and environmental pollution problems in the pyrolysis process. The system integrates multiple key components such as lithium bromide refrigeration device, cooling device, dust removal device, deodorizing device, chimney and water supply device, and constitutes a closed loop flue gas treatment and heat recovery process.

[0016] In terms of working principle, the system first receives high-temperature flue gas from the cracking reduction reaction equipment through the air inlet of the lithium bromide refrigeration device. Inside the lithium bromide refrigeration device, the high-temperature flue gas exchanges heat with the cooling medium (such as water or lithium bromide solution), transferring the heat in the flue gas to the cooling medium and achieving preliminary cooling of the flue gas. Subsequently, the heated cooling medium flows out of the water outlet of the lithium bromide refrigeration device and is divided into two paths: one is transported to the cooling device to cool the cracking reduction reaction equipment, ensuring stable operation of the equipment; the other enters the water supply device as hot water resources to supply other process requirements or daily life. After cooling by the lithium bromide refrigeration device, the temperature and dust content of the flue gas are greatly reduced, but further purification treatment is still needed. Therefore, the flue gas then enters the dust removal device to remove dust particles in the flue gas. Next, the flue gas enters the deodorization device, which uses advanced technologies such as activated carbon adsorption and catalytic oxidation to decompose, adsorb or convert harmful substances and odor substances in the flue gas, ensuring that the flue gas meets environmental standards before being discharged. Finally, the flue gas after dust removal and deodorization is safely and standard-compliantly discharged into the atmosphere through the chimney.

[0017] Throughout the process, the system not only effectively recovers and utilizes the waste heat of high-temperature flue gas, but also significantly reduces the emission of air pollutants, achieving resource recycling and friendly environmental protection. BRIEF DESCRIPTION OF DRAWINGS

[0018] The present application will be further described in detail below according to the drawings and examples.

[0019] Figure 1 A schematic diagram of the high-temperature flue gas recycling system according to an embodiment of the present application;

[0020] Figure 2 A perspective view of the dust removal device according to an embodiment of the present application.

[0021] In the figure: 1, lithium bromide refrigeration device; 2, cooling device; 3, dust removal device; 301, cyclone dust collector; 302, pulse dust collector; 4, deodorization device; 5, chimney; 6, water supply device; 7, heating device; 8, first condensing device; 9, second condensing device; 10, four-way valve; 11, electronic valve. DETAILED DESCRIPTION

[0022] To make the technical problems solved by the present application, the technical solutions adopted and the technical effects achieved more clear, the technical solutions of the embodiments of the present application are further described in detail below. Obviously, the described embodiments are only part of the embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0023] In the description of the application, unless otherwise clearly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0024] In this application, unless otherwise clearly specified and limited, the first feature "on" or "under" the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "under", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0025] As shown in Figure 1 and Figure 2 The embodiment provides a high-temperature flue gas recycling system, which comprises a lithium bromide refrigeration device 1, a cooling device 2, a dust removal device 3, a deodorization device 4, a chimney 5 and a water supply device 6. The lithium bromide refrigeration device 1 has an air inlet, an air outlet and a water outlet. The air inlet is connected with the flue gas outlet of a pyrolysis reduction reaction equipment through a pipeline. The air outlet is connected with the dust removal device 3 through a pipeline. The dust removal device 3 is connected with the deodorization device 4 through a pipeline. The deodorization device 4 is connected with the chimney 5 through a pipeline. The cooling device 2 is used for cooling the pyrolysis reduction reaction equipment. The water outlet is connected with the cooling device 2 and the water supply device 6 through a pipeline respectively.

[0026] Based on the above scheme, the pyrolysis reduction reaction equipment will produce high-temperature flue gas during the pyrolysis of household garbage. These flue gases are guided into the gas inlet of the lithium bromide refrigeration device 1 through the pipeline. After the high-temperature flue gas enters the lithium bromide refrigeration device 1, it exchanges heat with the cooling medium in the device. In this process, the heat of the flue gas is transferred to the cooling medium (usually water or lithium bromide solution), causing the cooling medium to warm up, while the flue gas is cooled. After heat exchange, the warmed cooling medium flows out of the water outlet of the lithium bromide refrigeration device 1, part of which is transported to the cooling device 2 for cooling the pyrolysis reduction reaction equipment; another part is transported to the water supply device 6 for other process requirements or as hot water supply. After being cooled by the lithium bromide refrigeration device 1, the flue gas has a lower temperature and dust content, but still needs further treatment. The flue gas first enters the dust removal device 3, which efficiently captures dust particles in the flue gas. Subsequently, the flue gas enters the deodorizing device 4, which uses active carbon adsorption method, catalytic oxidation method, etc. to decompose, adsorb or convert harmful substances and odor substances in the flue gas. After dust removal and deodorization treatment, the flue gas has reached the environmental protection standard in terms of emission concentration and emission temperature, and is finally discharged into the atmosphere through the chimney 5.

[0027] The system exchanges heat with the high-temperature flue gas through the lithium bromide refrigeration device 1, converting the heat in the flue gas into usable heat energy for cooling the pyrolysis reduction reaction equipment and other process requirements, not only reducing energy consumption, but also improving energy utilization. At the same time, through the dust removal device 3 and the deodorizing device 4, the flue gas is deeply treated to effectively remove dust particles and harmful substances in the flue gas, ensuring that the flue gas meets the emission standards. This not only reduces the emission of air pollutants, but also reduces environmental pollution. In addition, by recycling and utilizing the heat in the high-temperature flue gas, resource recycling is achieved. The dust removal device 3 can also recover useful substances (such as metal particles, carbon black, etc.) in the flue gas, further improving resource utilization. Moreover, by providing stable cooling and heat energy recovery functions, it helps the pyrolysis reduction reaction equipment to maintain the best working state, thereby improving the effect and stability of the pyrolysis process.

[0028] Further, the dust removal device 3 comprises a cyclone dust collector 301 and a pulse dust collector 302, the inlet end of the cyclone dust collector 301 is connected with the exhaust port, the outlet end of the cyclone dust collector 301 is connected with the inlet end of the pulse dust collector 302, and the outlet end of the pulse dust collector 302 is connected with the deodorization device 4. After the high-temperature flue gas is preliminarily cooled by the lithium bromide refrigeration device 1, it first enters the inlet end of the cyclone dust collector 301. In the cyclone dust collector 301, under the action of high-speed rotation, the flue gas generates centrifugal force, so that the heavier dust particles are thrown to the wall and fall to the dust hopper along the wall, and the purified flue gas is discharged from the top outlet end of the cyclone dust collector 301. Then, the flue gas at the outlet of the cyclone dust collector 301 enters the inlet end of the pulse dust collector 302. The pulse dust collector 302 uses filter bags as filter elements. When the flue gas passes through the filter bags, the dust particles are intercepted by the filter bags and adhere to the surface of the filter bags. As the dust on the surface of the filter bags accumulates, the pressure difference inside the dust collector gradually increases. At this time, the pulse dust collector 302 starts the ash removal program, and the filter bags are blown back by high-pressure gas pulses, so that the dust particles adhering to the surface of the filter bags fall off and fall into the ash hopper. After further treatment by the pulse dust collector 302, the dust particle content in the flue gas is greatly reduced, achieving higher dust removal efficiency. Finally, after the double treatment of the cyclone dust collector 301 and the pulse dust collector 302, the dust content of the flue gas is very low, and the quality is stable, and then enters the deodorization device 4 for decomposition and adsorption treatment of harmful substances. This combined dust removal device 3 not only improves the dust removal efficiency, but also ensures the smooth progress of the subsequent processing steps and the quality of the final discharged flue gas. The combination of the cyclone dust collector 301 and the pulse dust collector 302 significantly improves the dust particle capture efficiency in the high-temperature flue gas and reduces the dust content in the flue gas. At the same time, this design also prolongs the service life of the filter bags and reduces the maintenance cost of the dust collector. In addition, the efficient operation of the combined dust removal device 3 provides quality stable flue gas for the subsequent deodorization device 4 and chimney 5 discharge, ensuring the stable operation of the entire flue gas recycling system and the environmental protection standard discharge.

[0029] Furthermore, a spray assembly is installed inside the cyclone dust collector 301, which sprays water towards the inner wall of the cyclone dust collector 301, keeping the inner wall of the cyclone dust collector 301 in a wet state at all times. When high-temperature flue gas enters the cyclone dust collector 301, the rotating airflow inside causes dust particles to be thrown towards the wall under the action of centrifugal force. At this time, the spray assembly starts to work, spraying water to the inner wall of the cyclone dust collector 301, forming a layer of wet film. This layer of wet film not only helps to capture and adhere more dust particles, preventing them from being carried away by the airflow again, but also effectively suppresses the possibility of spontaneous combustion or chemical reaction of dust particles at high temperature, improving the safety and stability of the dust removal process. As the dust particles accumulate inside the cyclone dust collector 301, some particles will fall into the dust hopper with the water flow, while the purified flue gas continues to flow upwards into the pulse dust collector 302 for further dust removal treatment.

[0030] In some embodiments, the water outlet is also connected to the heat exchange area in the pyrolysis reduction reaction equipment through a pipeline. The heat exchange area includes a first condensing device 8 for condensing gaseous phase products and a second condensing device 9 for condensing solid phase products. The heat exchange area is subdivided into two main parts: the first condensing device 8 and the second condensing device 9. The first condensing device 8 is specifically used to condense gaseous phase products produced in the pyrolysis reduction reaction process, such as combustible gas or other volatile compounds. These gaseous phase products exchange heat with the cooling water from the lithium bromide refrigeration device 1 when passing through the first condensing device 8 at high temperature, thereby achieving condensation and liquefaction. The condensed liquid phase products can be more easily collected, stored and further utilized. The second condensing device 9 is used to condense solid phase products, such as solid residues produced in the pyrolysis process or solid substances that have not completely reacted. These solid phase products may still be at high temperature in the pyrolysis reduction reaction equipment, and through the cooling action of the second condensing device 9, their temperature can be quickly reduced, facilitating subsequent collection and processing. Connecting the water outlet of the lithium bromide refrigeration device 1 to the heat exchange area not only realizes the full utilization of high-temperature flue gas waste heat, but also provides a stable cooling source for the pyrolysis reduction reaction equipment. This design not only improves the overall energy utilization efficiency of the system, but also enhances the stability and reliability of the system.

[0031] In addition, by directly introducing cooling water into the heat exchange area of the pyrolysis reduction reaction equipment, the dependence on traditional cooling devices 2 can be reduced, further reducing the operating and maintenance costs of the system. At the same time, this design also helps to optimize the conditions of the pyrolysis reduction reaction, improving the reaction efficiency and product quality.

[0032] In particular, the four-way valve 10 is also included, which comprises a main valve port and three branch valve ports respectively in communication with the main valve port. The main valve port is connected with the water outlet through a first water pipe, and the three branch valve ports are respectively connected with the cooling device 2, the first condensing device 8 and the second condensing device 9 through pipelines. The four-way valve 10 can flexibly control the flow direction and flow rate of the cooling water by adjusting the opening and closing state of the valve according to the actual demand and operating state of the system. For example, when the cracking reduction reaction equipment needs additional cooling, the four-way valve 10 can allocate more cooling water to the cooling device 2; when the gas phase product or the solid phase product needs to be condensed, more cooling water can be allocated to the first condensing device 8 or the second condensing device 9. This design not only improves the utilization efficiency of cooling water, but also ensures that the cracking reduction reaction equipment and each condensing device can always operate in the best working state. At the same time, due to the introduction of the four-way valve 10, the flexibility and controllability of the system are significantly improved, so that the system can better adapt to different operating conditions and process requirements. Moreover, the introduction of the four-way valve 10 also reduces the complexity and maintenance cost of the system. By centrally controlling the opening and closing state of the four-way valve 10, unified management and monitoring of the entire cooling system can be realized, thereby simplifying the operation process and maintenance work of the system.

[0033] At the same time, the water supply device 6 is connected with the water outlet through a second water pipe, and an electronic valve 11 is arranged on the second water pipe. The electronic valve 11, as an intelligent control element, can accurately control the opening and closing of the water flow according to the preset conditions or received signals. By arranging the electronic valve 11 on the connecting pipeline between the water supply device 6 and the water outlet, the system can flexibly adjust the water amount supplied to the water supply device 6 according to the actual demand. The electronic valve 11 also improves the safety and stability of the system. In emergency situations, such as detection of abnormal water pressure, high water temperature and other potential risks by the system, the system can quickly close the electronic valve 11 to cut off the water flow, prevent the fault from further expanding, and ensure the safe operation of the system. For the water supply device 6, the accurate control of the electronic valve 11 also ensures the stability and continuity of the water supply, providing a reliable water source for other process requirements or daily life water. At the same time, the intelligent management of the electronic valve 11 also enables the system to optimize the allocation of water resources according to the actual water use, improving the utilization efficiency of water resources.

[0034] Generally, the water supply device 6 includes a hot water section and a cold water section. The lithium bromide refrigeration device 1 can flexibly adjust its working mode according to the actual demand of the system to produce appropriate amount of cold water or hot water. When the system needs hot water, the lithium bromide refrigeration device 1 transfers the heat in the high-temperature flue gas to the cooling medium (such as water or lithium bromide solution) to make it warm. Subsequently, the warmed cooling medium is transported to the hot water section to supply hot water resources to other process requirements or daily life use. In the hot water section, the system can further adjust the temperature and flow of the hot water to meet the specific needs of different water use scenarios.

[0035] On the contrary, when the system needs cold water, the lithium bromide refrigeration device 1 absorbs the heat in the high-temperature flue gas and discharges it to the external environment through another working mode, while cooling the cooling medium. The cooled cooling medium is transported to the cold water section to supply cold water resources to the equipment or process that needs cooling. In the cold water section, the system can also accurately control the temperature and flow of the cold water to ensure the stability and reliability of the cooling effect. This design not only improves the heat energy recycling efficiency of the lithium bromide refrigeration device 1, but also enables the water supply device 6 to flexibly respond to different water use demands, achieving effective distribution and management of cold and hot water. At the same time, since the system can automatically adjust the production and distribution of cold and hot water according to actual demand, it further reduces energy waste and operating costs.

[0036] Further, the deodorization device 4 includes a primary deodorization tower and a secondary deodorization tower, the inlet end of the primary deodorization tower is connected with the outlet end of the dust removal device 3, the outlet end of the primary deodorization tower is connected with the inlet end of the secondary deodorization tower, and the outlet end of the secondary deodorization tower is connected with the chimney 5. The primary deodorization tower serves as the first line of defense in the deodorization system, with its inlet end directly connected to the outlet end of the dust removal device 3. When the flue gas treated by the dust removal device 3 enters the primary deodorization tower, the deodorization medium (such as activated carbon, chemical adsorbent, etc.) in the tower will adsorb and decompose harmful substances in the flue gas, such as sulfides, nitrogen oxides, volatile organic compounds, etc. The design of the primary deodorization tower usually takes into account factors such as flue gas flow, temperature and harmful substance concentration to ensure the optimization of deodorization effect. After being treated by the primary deodorization tower, the harmful substance content in the flue gas has been significantly reduced, but some pollutants that are difficult to completely remove may still remain. Therefore, the flue gas then enters the secondary deodorization tower for further purification treatment. The secondary deodorization tower is usually designed to be more delicate and efficient, using more advanced deodorization technologies and materials, such as biological filter, wet oxidation, etc., to achieve deep removal of residual pollutants. Finally, after being treated by the two-stage deodorization system, the flue gas has very low harmful substance content and meets environmental emission standards. These purified flue gas is then safely discharged into the atmosphere through the chimney 5, without causing pollution and harm to the environment.

[0037] In addition, the design of the primary and secondary deodorization towers also takes into account the stability and reliability of the system. A buffer zone and monitoring device are usually provided between the two deodorization towers to ensure the stability and continuity of the flue gas during transmission. At the same time, the system is equipped with an automatic control system and alarm device to monitor the deodorization effect and equipment status in real time, and to issue an alarm and take emergency measures in a timely manner when an abnormality occurs.

[0038] Furthermore, the primary and secondary deodorization towers each include a spray tower and a liquid collecting tank arranged inside the spray tower for storing deodorizing liquid. The spray tower, as the core component of the deodorization tower, works by spraying deodorizing liquid in mist form into the flue gas, allowing the deodorizing liquid to fully contact and react with harmful substances in the flue gas. In this process, the active ingredients in the deodorizing liquid can adsorb, decompose, or neutralize harmful substances in the flue gas, thereby removing them from the flue gas. The liquid collecting tank is located inside the spray tower and is used to store and recycle the deodorizing liquid. During the deodorization process, the nozzles at the top of the spray tower continuously spray the deodorizing liquid from the liquid collecting tank into the flue gas. At the same time, the collection device at the bottom of the spray tower collects the reacted waste liquid and sends it back to the liquid collecting tank for regeneration or treatment. This cycle not only improves the utilization efficiency of the deodorizing liquid, but also reduces waste liquid discharge and environmental pollution. For the primary and secondary deodorization towers, the design of the spray tower and liquid collecting tank takes into account factors such as flue gas flow, temperature, harmful substance concentration, and the properties of the deodorizing liquid. Through precise calculation and simulation analysis, the system can determine the optimal spray volume, spray pressure, and deodorizing liquid concentration, etc. to ensure the optimization of the deodorization effect.

[0039] On the other hand, a pyrolysis reduction treatment device is also provided, comprising: a heating device 7 and a high-temperature flue gas recycling system as described above, the flue gas outlet of the heating device 7 is connected with the gas inlet.

[0040] In the description herein, it should be understood that the terms "upper", "lower", "left", "right", and the like orientation or position relationship are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are only used to distinguish in the description, and have no special meaning.

[0041] In the description of the present specification, the description referring to the terms "an embodiment", "an example", and the like means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example.

[0042] In addition, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that those skilled in the art can understand.

[0043] The technical principles of the present application are described above in combination with specific embodiments. These descriptions are only for the purpose of explaining the principles of the present application, and cannot be interpreted in any way as a limitation on the scope of protection of the present application. Based on the explanations here, those skilled in the art can think of other specific embodiments of the present application without creative labor, and these ways will fall within the scope of protection of the present application.

Claims

1. A high temperature flue gas recycling system, characterized by, The system comprises a lithium bromide refrigeration device (1), a cooling device (2), a dust removal device (3), a deodorization device (4), a chimney (5), and a water supply device (6), the lithium bromide refrigeration device (1) has an air inlet, an air outlet, and a water outlet, the air inlet is connected to the flue gas outlet of the pyrolysis reduction reaction equipment through a pipeline, the air outlet is connected to the dust removal device (3) through a pipeline, the dust removal device (3) is connected to the deodorization device (4) through a pipeline, the deodorization device (4) is connected to the chimney (5) through a pipeline, the cooling device (2) is used for cooling the pyrolysis reduction reaction equipment, and the water outlet is connected to the cooling device (2) and the water supply device (6) through pipelines respectively. The dust removal device (3) comprises a cyclone dust collector (301) and a pulse dust collector (302), the inlet end of the cyclone dust collector (301) is connected to the air outlet, the outlet end of the cyclone dust collector (301) is connected to the inlet end of the pulse dust collector (302), and the outlet end of the pulse dust collector (302) is connected to the deodorization device (4).

2. The high temperature exhaust gas recycling system of claim 1, wherein, A spraying assembly is arranged in the cyclone dust collector (301), the spraying assembly sprays water towards the inner wall of the cyclone dust collector (301), so that the inner wall of the cyclone dust collector (301) is always in a wet state.

3. The high temperature exhaust gas recycling system of claim 2, wherein, The water outlet is also connected to a heat exchange area in the pyrolysis reduction reaction equipment through a pipeline, the heat exchange area comprises a first condensing device (8) for condensing gaseous phase products and a second condensing device (9) for condensing solid phase products.

4. The high temperature exhaust gas recycling system of claim 1, wherein, A four-way valve (10) is further included, the four-way valve (10) comprises a main valve port and three branch valve ports in communication with the main valve port, the main valve port is connected to the water outlet through a first water pipe, and the three branch valve ports are connected to the cooling device (2), the first condensing device (8), and the second condensing device (9) through pipelines respectively.

5. The high temperature exhaust gas recycling system of claim 4, wherein, The water supply device (6) is connected to the water outlet through a second water pipe, and an electronic valve (11) is arranged on the second water pipe.

6. The high temperature exhaust gas recycling system according to any one of claims 1 to 5, characterized in that, The water supply device (6) comprises a hot water part and a cold water part.

7. The high temperature exhaust gas recycling system according to any one of claims 1 to 5, characterized in that, The deodorization device (4) comprises a primary deodorization tower and a secondary deodorization tower, the inlet end of the primary deodorization tower is connected to the outlet end of the dust removal device (3), the outlet end of the primary deodorization tower is connected to the inlet end of the secondary deodorization tower, and the outlet end of the secondary deodorization tower is connected to the chimney (5).

8. The high temperature exhaust gas recycling system according to any one of claims 1-5, wherein, The primary deodorization tower and the secondary deodorization tower both comprise a spraying tower and a liquid collecting tank arranged in the spraying tower, and the liquid collecting tank is used for storing deodorizing liquid.

9. The high temperature exhaust gas recycling system of claim 8, wherein, The system comprises a heating device (7) and the high-temperature flue gas recycling system according to any one of claims 1-9, and the flue gas outlet of the heating device (7) is connected to the air inlet.

10. A pyrolytic reduction processing apparatus, characterized by comprising: ​ ​

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