Waste gas treatment system

Abstract

The invention discloses a waste gas treatment system which comprises a waste heat recovery device, a first heat exchange channel, a second heat exchange channel, a waste gas treatment device, a waste gas treatment device, a waste gas treatment device and a waste gas treatment device, wherein the waste heat recovery device is provided with a first heat exchange channel and a second heat exchange channel; the condenser is provided with a waste gas channel and a condensation piece, the two ends of the waste gas channel communicate with the first heat exchange channel and the second heat exchange channel correspondingly, the end, away from the waste gas channel, of the first heat exchange channel is used for receiving waste gas, and the condensation piece is used for cooling the waste gas in the waste gas channel. According to the waste gas treatment system, heat in the waste gas is effectively recycled while the requirements of different treatment devices for the temperature and / or humidity of the waste gas are met, so that internal heat is circulated, the purpose of saving energy is achieved, it is guaranteed that the waste gas treatment system is stable and effective for a long time, and the cost of the waste gas treatment system is effectively reduced; the structure of the waste gas treatment system is simplified, and the space and maintenance cost of the waste gas treatment system are saved.

Description

Technical Field

[0001] The present invention relates to the technical field of waste gas treatment, and in particular to a waste gas treatment system. Background Art

[0002] The new energy industry has developed vigorously in recent years, and the safety test of power batteries is an essential link in production. In the safety test of power batteries, the composition and properties of the waste gas from the external fire test are relatively complex. The waste gas exists in a coexisting state of solid, gaseous and liquid multi-phase states, with both organic and inorganic complex components, high viscosity and high temperature, and is extremely difficult to treat. In the prior art, due to different requirements of different treatment devices for the temperature and / or humidity of the waste gas, a variety of temperature control and humidity adjustment devices need to be configured, resulting in a complex system structure and high cost. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. For this purpose, the present invention provides a waste gas treatment system, which can effectively recover the heat in the waste gas to enable internal heat circulation, so as to achieve the purpose of energy conservation, ensure the long-term stable and effective operation of the waste gas treatment system, effectively reduce the cost of the waste gas treatment system, simplify the structure of the waste gas treatment system, and save the space and maintenance cost of the waste gas treatment system.

[0004] The waste gas treatment system according to an embodiment of the present invention includes: a waste heat recovery device having a first heat exchange channel and a second heat exchange channel for heat exchange with each other; a condenser having a waste gas channel and a condensing member, both ends of the waste gas channel are respectively communicated with the first heat exchange channel and the second heat exchange channel, one end of the first heat exchange channel away from the waste gas channel is used to receive waste gas, and the condensing member is used to cool the waste gas in the waste gas channel.

[0005] The waste gas treatment system according to an embodiment of the present invention has a first heat exchange channel and a second heat exchange channel for heat exchange with each other in the waste heat recovery device, a condenser has a waste gas channel and a condensing member, both ends of the waste gas channel are respectively communicated with the first heat exchange channel and the second heat exchange channel, one end of the first heat exchange channel away from the waste gas channel is used to receive waste gas, and the condensing member is used to cool the waste gas in the waste gas channel. While meeting the temperature and / or humidity requirements of different treatment devices for the waste gas, it can effectively recover the heat in the waste gas to enable internal heat circulation, so as to achieve the purpose of energy conservation, ensure the long-term stable and effective operation of the waste gas treatment system, effectively reduce the cost of the waste gas treatment system, simplify the structure of the waste gas treatment system, and save the space and maintenance cost of the waste gas treatment system.

[0006] In some embodiments of the present invention, the waste heat recovery device includes: a first outer shell; a tube bundle, the tube bundle is located within the first outer shell, a second heat exchange channel is formed within the tube bundle, and a first heat exchange channel is formed between the tube bundle and the first outer shell.

[0007] In some embodiments of the present invention, the waste heat recovery device further includes: a first cleaning assembly, at least a part of the first cleaning assembly is located within the first outer shell, and is used for cleaning the outer wall surface of the tube bundle and the inner wall surface of the first outer shell.

[0008] In some embodiments of the present invention, the first cleaning assembly includes: a first water tank, the first water tank is located outside the first outer shell; a first cleaning pump head, a part of the first cleaning pump head is located within the first outer shell, and is used for spraying the water in the first water tank onto the outer wall surface of the tube bundle and the inner wall surface of the first outer shell.

[0009] In some embodiments of the present invention, the first cleaning assembly further includes: a first return pipe, one end of the first return pipe is connected to the first heat exchange channel, and the other end is connected to the first water tank; and / or, a first make-up water pipe, the first make-up water pipe is connected to the first water tank and is used for replenishing water into the first water tank; and / or, a first sewage pipe, the first sewage pipe is connected to the first water tank and is used for emptying the first water tank.

[0010] In some embodiments of the present invention, the waste heat recovery device further includes: a differential pressure gauge, the differential pressure gauge is used for detecting the degree of blockage of the first heat exchange channel.

[0011] In some embodiments of the present invention, the condenser includes: a second outer shell, the condensing member is a condensing tube and is located within the second outer shell, and an exhaust gas channel is formed between the second outer shell and the condensing tube.

[0012] In some embodiments of the present invention, the second outer shell has a condensate drain port, and the condensate drain port is used for discharging the condensed water within the second outer shell.

[0013] In some embodiments of the present invention, a first treatment device is provided between the first heat exchange channel and the exhaust gas channel, and the first treatment device is used for treating the exhaust gas.

[0014] In some embodiments of the present invention, the first treatment device includes: an alkali liquor spray tower, which is used for removing NO2 and SO2 in the exhaust gas.

[0015] In some embodiments of the present invention, the first treatment device further includes: an electrostatic precipitator, which is used for removing particulate matter in the exhaust gas and converting NOx in the exhaust gas into NO2.

[0016] In some embodiments of the present invention, it further includes: a second processing device, which is communicated with one end of the second heat exchange channel away from the exhaust gas channel, and is used for processing the exhaust gas.

[0017] In some embodiments of the present invention, the second processing device includes: an adsorption assembly, which is used for adsorbing VOCs in the exhaust gas.

[0018] In some embodiments of the present invention, it further includes: a centrifugal fan, which drives the exhaust gas to flow through the first heat exchange channel, the exhaust gas channel and the second heat exchange channel in sequence.

[0019] The additional aspects and advantages of the present invention will be partly given in the following description, partly will become obvious from the following description, or be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and / or additional aspects and advantages of the present invention will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, in which:

[0021] Figure 1 is a schematic structural diagram of an exhaust gas treatment system according to an embodiment of the present invention;

[0022] Figure 2 is a schematic structural diagram of a waste heat recovery device according to an embodiment of the present invention;

[0023] Figure 3 is a schematic structural diagram of an electrostatic precipitator according to an embodiment of the present invention;

[0024] Figure 4 is a schematic structural diagram of an alkali liquor spray tower according to an embodiment of the present invention;

[0025] Figure 5 is a schematic structural diagram of a condenser according to an embodiment of the present invention.

[0026] REFERENCE SIGNS:

[0027] 100, exhaust gas treatment system;

[0028] 1, waste heat recovery device; 11, first heat exchange channel; 12, tube bundle; 121, second heat exchange channel; 13, first outer shell; 14, first cleaning assembly; 141, first water tank; 142, first cleaning pump head; 1421, first high-pressure cleaning pump; 1422, first pump head; 143, first return pipe; 144, first make-up water pipe; 145, first sewage discharge pipe; 15, differential pressure gauge;

[0029] 2, condenser; 21, exhaust gas channel; 22, condensation member; 23, second outer shell; 231, condensate discharge port;

[0030] 3. First processing device; 31. Alkali solution spray tower; 311. First housing; 3111. First exhaust gas chamber; 3112. Air inlet; 3113. Air outlet; 312. Spray assembly; 3121. Nozzle; 3122. Circulation pump; 313. Packing area; 314. Demister; 315. Circulating alkali solution tank; 3151. First water replenishment port; 3152. First drain port; 3153. Alkali replenishment port; 3154. pH meter; 316. Chemical dosing assembly; 3161. Chemical storage tank; 3162. Agitator; 3163. Chemical dosing pump; 3164. Feeding port; 3165. Second water replenishment port;

[0031] 32. Electrostatic precipitator; 321. Second housing; 3211. Second exhaust gas chamber; 322. Electric field assembly; 3221. Anode plate; 323. Second water tank; 324. Second cleaning pump head; 3241. Second high-pressure cleaning pump; 3242. Second pump head; 325. Second return pipe; 326. Second water supply pipe; 327. Second sewage pipe;

[0032] 4. Second processing device; 41. Adsorption assembly;

[0033] 5. Centrifugal fan;

[0034] 6. Chimney;

[0035] 71. Total water inlet; 72. Water inlet and drainage. Detailed implementation manners

[0036] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation to the present invention.

[0037] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0038] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] The exhaust gas treatment system 100 needs to be provided with multiple treatment devices to remove particulate matter, total non-methane hydrocarbons, and acidic substances generated by the combustion of sulfur- and nitrogen-containing substances in the exhaust gas respectively before discharging, so as to ensure that the discharged exhaust gas meets the standards and complies with environmental protection regulations. At the same time, since different treatment devices have different requirements for the temperature and / or humidity of the exhaust gas, the prior art usually sets a variety of temperature control and humidity adjustment devices such as heat exchangers, condensers, heaters, coolers, dehumidifiers, or heat pumps between treatment devices with different temperatures and humidities according to needs to meet the working requirements of different treatment devices.

[0040] For example, in the safety test of power batteries, the composition and properties of the exhaust gas in the external fire test are relatively complex, including particulate matter generated by the incomplete combustion of gasoline and battery organic matter, water vapor generated by combustion condensed into liquid water in the pipeline, gasoline volatilized and condensed into oil mist in the pipeline, total non-methane hydrocarbons generated by the volatilization of organic matter such as gasoline, and acidic substances generated by the combustion of sulfur- and nitrogen-containing substances. The exhaust gas is in a coexistence state of solid, gaseous, and liquid multiphase states, with both organic and inorganic complex components, high viscosity, and high temperature.

[0041] The following describes the exhaust gas treatment system 100 according to an embodiment of the present invention with reference to the accompanying drawings.

[0042] As Figure 1 、 Figure 2 and Figure 5 shown, the exhaust gas treatment system 100 according to an embodiment of the present invention includes a waste heat recovery device 1 and a condenser 2.

[0043] Among them, the waste heat recovery device 1 has a first heat exchange channel 11 and a second heat exchange channel 121 that exchange heat with each other. The condenser 2 has an exhaust gas channel 21 and a condensing member 22. Both ends of the exhaust gas channel 21 are respectively communicated with the first heat exchange channel 11 and the second heat exchange channel 121. One end of the first heat exchange channel 11 away from the exhaust gas channel 21 is used to receive exhaust gas, and the condensing member 22 is used to cool the exhaust gas in the exhaust gas channel 21.

[0044] It is understandable that the exhaust gas discharged by the exhaust gas generating device has a relatively high temperature. The high-temperature exhaust gas discharged by the exhaust gas generating device enters the first heat exchange channel 11 from one end of the first heat exchange channel 11 far away from the exhaust gas channel 21, and exchanges heat with the high-temperature exhaust gas in the first heat exchange channel 11 through the heat exchange medium in the second heat exchange channel 121, so as to reduce the temperature of the exhaust gas in the first heat exchange channel 11 and recover the temperature of the exhaust gas through the heat exchange medium in the second heat exchange channel 121, so that the exhaust gas flowing out of the first heat exchange channel 11 meets the temperature requirements of the treatment device, so that the treatment device can be connected in series between the first heat exchange channel 11 and the exhaust gas channel 21 to treat the exhaust gas.

[0045] In order to meet the temperature and / or humidity requirements of different treatment devices for the exhaust gas, both ends of the exhaust gas channel 21 of the condenser 2 are respectively communicated with the first heat exchange channel 11 and the second heat exchange channel 121. The condensing member 22 cools the exhaust gas in the exhaust gas channel 21, so that the cooled exhaust gas flows into the second heat exchange channel 121 and serves as the heat exchange medium in the second heat exchange channel 121 to exchange heat with the exhaust gas in the first heat exchange channel 11. Thus, while reducing the temperature of the exhaust gas in the first heat exchange channel 11, the exhaust gas in the first heat exchange channel 11 is used to increase the temperature of the exhaust gas in the second heat exchange channel 121, and then the heat in the exhaust gas is effectively recovered to realize internal heat circulation, so as to achieve the purpose of energy saving, effectively reduce the cost of the exhaust gas treatment system 100, and ensure the long-term stable and effective operation of the exhaust gas treatment system 100.

[0046] At the same time, since the condensing member 22 cools the exhaust gas in the exhaust gas channel 21, the humidity of the exhaust gas flowing out of the exhaust gas channel 21 can be reduced, and after flowing through the second heat exchange channel 121 and rising in temperature, it flows to the treatment device to meet the temperature and humidity requirements of the treatment device for the exhaust gas.

[0047] In addition, compared with the prior art, the exhaust gas treatment system 100 of the present application can effectively recover the heat in the exhaust gas, and can reduce heating or cooling equipment and humidity control devices such as dehumidifiers, thereby simplifying the structure of the exhaust gas treatment system 100 and saving the space and maintenance cost of the exhaust gas treatment system 100.

[0048] In a specific embodiment of the present invention, the condensing member 22 of the condenser 2 cools the exhaust gas in the exhaust gas channel 21, so that the temperature of the exhaust gas in the exhaust gas channel 21 is controlled to the dew point of 15 °C and then flows to the second heat exchange channel 121. After that, the heat of the exhaust gas in the first heat exchange channel 11 is recovered and heat-exchanged with the exhaust gas in the second heat exchange channel 121, so that the temperature of the exhaust gas flowing out of one end of the second heat exchange channel 121 far away from the exhaust gas channel 21 rises to 30 °C and the relative humidity is controlled at about 40%, meeting the working requirements of the subsequent treatment device for both temperature and relative humidity.

[0049] The waste gas treatment system 100 according to an embodiment of the present invention has a first heat exchange channel 11 and a second heat exchange channel 121 that exchange heat with each other through a waste heat recovery device 1. The condenser 2 has a waste gas channel 21 and a condensing member 22. The two ends of the waste gas channel 21 are respectively communicated with the first heat exchange channel 11 and the second heat exchange channel 121. One end of the first heat exchange channel 11 away from the waste gas channel 21 is used to receive waste gas. The condensing member 22 is used to cool the waste gas in the waste gas channel 21. While meeting the temperature and / or humidity requirements of waste gas for different treatment devices, the heat in the waste gas is effectively recovered to enable internal heat circulation, thereby achieving the purpose of energy conservation, ensuring the long-term stable and effective operation of the waste gas treatment system 100, effectively reducing the cost of the waste gas treatment system 100, simplifying the structure of the waste gas treatment system 100, and saving the space and maintenance cost of the waste gas treatment system 100.

[0050] In some embodiments of the present invention, as Figure 1 and Figure 2 shown, the waste heat recovery device 1 includes a first housing 13 and a tube bundle 12. Among them, the tube bundle 12 is located inside the first housing 13. The second heat exchange channel 121 is formed inside the tube bundle 12, and the first heat exchange channel 11 is formed between the tube bundle 12 and the first housing 13.

[0051] Thus, the high-temperature waste gas discharged from the waste gas generating device enters the first heat exchange channel 11 formed between the tube bundle 12 and the first housing 13, and the waste gas cooled by the condensing member 22 flows into the second heat exchange channel 121 formed inside the tube bundle 12. At the same time, the arrangement of the tube bundle 12 inside the first housing 13 ensures the heat exchange efficiency between the waste gas in the first heat exchange channel 11 and the waste gas in the second heat exchange channel 121, and further ensures the effective recovery of the heat in the waste gas.

[0052] In addition, since the high-temperature waste gas discharged from the waste gas generating device contains particulate matter or corrosive substances and is prone to ash accumulation, the first heat exchange channel 11 is formed between the tube bundle 12 and the first housing 13, which is convenient for cleaning the outer wall surface of the tube bundle 12 and the inner wall surface of the first housing 13, and is convenient for the maintenance of the waste gas generating device.

[0053] In some embodiments of the present invention, as Figure 1 and Figure 2 shown, the waste heat recovery device 1 further includes a first cleaning assembly 14. Among them, at least part of the first cleaning assembly 14 is located inside the first housing 13 and is used to clean the outer wall surface of the tube bundle 12 and the inner wall surface of the first housing 13.

[0054] It can be understood that since the high-temperature exhaust gas discharged from the exhaust gas generating device contains particulate matter or corrosive substances, the outer wall surface of the tube bundle 12 and the inner wall surface of the first housing 13 are prone to ash accumulation, resulting in blockage of the first heat exchange channel 11 and a reduction in the heat exchange efficiency between the first heat exchange channel 11 and the second heat exchange channel 121. Therefore, the outer wall surface of the tube bundle 12 and the inner wall surface of the first housing 13 are cleaned by the first cleaning assembly 14, thereby effectively cleaning the outer wall surface of the tube bundle 12 and the inner wall surface of the first housing 13, ensuring the heat exchange efficiency of the first heat exchange channel 11 and the second heat exchange channel 121, and the overall reliability of the exhaust gas treatment system 100. At the same time, by tilting the outer wall surface of the tube bundle 12 and the inner wall surface of the first housing 13 through the first cleaning assembly 14, the frequency of manual cleaning can be reduced, and the maintenance cost can be lowered.

[0055] In some embodiments of the present invention, as Figure 1 and Figure 2 shown, the first cleaning assembly 14 includes a first water tank 141 and a first cleaning pump head 142. Among them, the first water tank 141 is located outside the first housing 13, and at least a part of the first cleaning pump head 142 is located inside the first housing 13, and is used to spray the water in the first water tank 141 onto the outer wall surface of the tube bundle 12 and the inner wall surface of the first housing 13. Therefore, the water in the first water tank 141 is sprayed onto the outer wall surface of the tube bundle 12 and the inner wall surface of the first housing 13 through the first cleaning pump head 142, thereby realizing the cleaning of the outer wall surface of the tube bundle 12 and the inner wall surface of the first housing 13. At the same time as realizing the cleaning, the structure of the first cleaning assembly 14 is simple and convenient for cleaning.

[0056] Furthermore, as Figure 2 shown, the first cleaning pump head 142 includes a first high-pressure cleaning pump 1421 and a first pump head 1422. The first pump head 1422 is located inside the first housing 13. One end of the first high-pressure cleaning pump 1421 is connected to the first water tank 141, and the other end is connected to the first high-pressure pump head. The first high-pressure pump head pumps the water in the first water tank 141 to the first pump head 1422, and the first pump head 1422 sprays the water onto the outer wall surface of the tube bundle 12 and the inner wall surface of the first housing 13, realizing the cleaning of the outer wall surface of the tube bundle 12 and the inner wall surface of the first housing 13.

[0057] Even further, as Figure 2 shown, the first cleaning pump head 142 further includes a first filter, which is located outside the first housing 13 and is used to filter the water pumped from the first water tank 141 to the first pump head 1422, improving the cleanliness of the water pumped to the first pump head 1422, thereby avoiding frequent maintenance of the first pump head 1422 and reducing the maintenance cost.

[0058] In some embodiments of the present invention, as Figure 1 and Figure 2As shown, the first cleaning assembly 14 further includes a first return pipe 143. One end of the first return pipe 143 is connected to the first heat exchange channel 11, and the other end is connected to the first water tank 141. Thus, after the first cleaning pump head 142 sprays the water in the first water tank 141 onto the outer wall surface of the tube bundle 12 and the inner wall surface of the first housing 13, the waste water after cleaning in the first heat exchange channel 11 is discharged into the first water tank 141 through the first converging pipe, realizing the recycling of the waste water.

[0059] Further, when the waste gas treatment system 100 treats waste gas, the first return pipe 143 extends below the water level in the first water tank 141. It can be understood that the treatment of waste gas by the waste gas treatment system 100 and the cleaning of the first cleaning assembly 14 are carried out separately. By extending the first return pipe 143 below the water level in the first water tank 141, a water seal is realized, thereby preventing air from entering the first heat exchange channel 11 from the first return water pipe under the action of negative pressure, resulting in waste gas dilution, and improving the overall reliability.

[0060] In some embodiments of the present invention, as Figure 2 shown, the first cleaning assembly 14 further includes a first water supply pipe 144. The first water supply pipe 144 is connected to the first water tank 141 and is used to supply water to the first water tank 141. Thus, water is supplied to the first water tank 141 through the first water supply pipe 144 to ensure the water level in the first water tank 141, thereby ensuring that the first cleaning pump head 142 sprays the water in the first water tank 141 onto the outer wall surface of the tube bundle 12 and the inner wall surface of the first housing 13, and improving the overall reliability.

[0061] Further, the first cleaning assembly 14 further includes a first float valve. The first float valve is located in the first water tank 141 and is used to control the water level in the first water tank 141, further improving the reliability of the first cleaning assembly 14.

[0062] In some embodiments of the present invention, as Figure 2 shown, the first cleaning assembly 14 further includes a first sewage pipe 145. The first sewage pipe 145 is connected to the first water tank 141 and is used to empty the first water tank 141. Thus, the first water tank 141 can be emptied through the first sewage pipe 145, which is convenient for cleaning, maintenance, and replacing the water in the first water tank 141, and improves the reliability of the first cleaning assembly 14.

[0063] Further, the first cleaning assembly 14 further includes a first return pipe 143. One end of the first return pipe 143 is connected to the first heat exchange channel 11, and the other end is connected to the first water tank 141. Thus, after the first cleaning pump head 142 sprays the water in the first water tank 141 onto the outer wall surface of the tube bundle 12 and the inner wall surface of the first housing 13, the waste water after cleaning in the first heat exchange channel 11 is discharged into the first water tank 141 through the first confluence pipe, realizing the recycling of the waste water. And the first water tank 141 can be emptied through the first sewage pipe 145, which is convenient for cleaning, maintenance and replacement of the water in the first water tank 141, and improves the reliability of the first cleaning assembly 14.

[0064] In some embodiments of the present invention, as Figure 2 shown, the waste heat recovery device 1 further includes a differential pressure gauge 15. The differential pressure gauge 15 is used to detect the degree of blockage of the first heat exchange channel 11. It can be understood that since the high-temperature waste gas discharged by the waste gas generating device contains particulate matter or corrosive substances, the outer wall surface of the tube bundle 12 and the inner wall surface of the first housing 13 are prone to ash accumulation, resulting in blockage of the first heat exchange channel 11 and reduction of the heat exchange efficiency between the first heat exchange channel 11 and the second heat exchange channel 121. Thus, by detecting the degree of blockage of the first heat exchange channel 11 with the differential pressure gauge 15 and controlling the differential pressure in the first heat exchange channel 11, the heat exchange efficiency between the first heat exchange channel 11 and the second heat exchange channel 121 is ensured, the stable and efficient operation of the waste heat recovery device 1 is guaranteed, and the overall reliability is improved.

[0065] Further, the waste heat recovery device 1 includes a first housing 13 and a tube bundle 12. The tube bundle 12 is located in the first housing 13. A second heat exchange channel 121 is formed in the tube bundle 12, and a first heat exchange channel 11 is formed between the tube bundle 12 and the first housing 13. The first housing 13 has an inlet and an outlet. There are two differential pressure gauges 15 which are respectively arranged at the inlet and the outlet. By the difference between the two differential pressure gauges 15 arranged at the inlet and the outlet, the degree of blockage of the first heat exchange channel 11 can be obtained, so as to ensure the stable operation efficiency, equipment safety and production continuity of the waste heat recovery device 1.

[0066] In some embodiments of the present invention, as Figure 1 and Figure 5 shown, the condenser 2 includes a second housing 23. The condensing member 22 is a condensing pipe and is located in the second housing 23. An exhaust gas channel 21 is formed between the second housing 23 and the condensing pipe. It can be understood that the condensing pipe has a condensing inlet and a condensing outlet. The condensing medium enters the condensing pipe through the condensing inlet, exchanges heat with the exhaust gas in the exhaust gas channel 21, and then is discharged from the condensing outlet, so as to realize the cooling and dehumidification of the exhaust gas in the exhaust gas channel 21, so that the humidity of the exhaust gas flowing into the second heat exchange channel 121 in the exhaust gas channel 21 meets the requirements.

[0067] In some embodiments of the present invention, as Figure 1and Figure 5 As shown in Figure 5 , the second housing 23 has a condensate drain port 231 for discharging the condensed water in the second housing 23. Thus, during the process of the condensate pipe cooling the waste gas in the waste gas passage 21, when the temperature of the waste gas drops below the dew point, the generated condensed water can be discharged from the second housing 23 through the condensate drain port 231, improving the overall reliability.

[0068] In some embodiments of the present invention, as Figures 1 - 5 shown in Figures 1 - 5 , there is a first treatment device 3 between the first heat exchange passage 11 and the waste gas passage 21, and the first treatment device 3 is used to treat the waste gas.

[0069] Thus, the high-temperature waste gas discharged from the waste gas generating device enters the first heat exchange passage 11 from one end of the first heat exchange passage 11 far from the waste gas passage 21 and exchanges heat with the low-temperature waste gas in the second heat exchange passage 121, reducing the temperature of the waste gas in the first heat exchange passage 11, so that the waste gas flowing out of the first heat exchange passage 11 meets the temperature requirement of the first treatment device 3, ensuring the treatment effect of the first treatment device 3 on the waste gas and improving the reliability of the waste gas treatment system 100.

[0070] In some embodiments of the present invention, as Figure 1 and Figure 4 shown in Figure 4 , the first treatment device 3 includes an alkali solution spray tower 31. Among them, the alkali solution spray tower 31 is used to remove NO2 and SO2 in the waste gas. It can be understood that NO2 and SO2 in the waste gas, as typical acidic oxides, have strong chemical activity, and a high-efficiency neutralization reaction occurs with the alkaline solution sprayed by the alkali solution spray tower 31, so that the acidic waste gas is treated up to standard and complies with environmental protection regulations. At the same time, since the waste gas treated by the alkali solution spray tower 31 has a high humidity, the waste gas treated by the alkali solution spray tower 31 flows into the waste gas passage 21 and can be effectively cooled by the condensate member 22, reducing the humidity of the waste gas flowing out of the waste gas passage 21 to meet the humidity requirement of the subsequent treatment device.

[0071] In some embodiments of the present invention, as Figure 1 and Figure 4 shown in Figure 4 , the alkali solution spray tower 31 includes a first housing 311 and a spray assembly 312. Among them, the first housing 311 has a first waste gas chamber 3111, and the first waste gas chamber 3111 is connected in series between the first heat exchange passage 11 and the waste gas passage 21. At least part of the spray assembly 312 is located in the first housing 311 and is used to spray the alkali solution into the first waste gas chamber 3111.

[0072] Thus, the waste gas flowing out of one end of the first heat exchange channel 11 away from the waste gas channel 21 enters the first waste gas chamber 3111, and the lye is sprayed into the first waste gas chamber 3111 through the spraying assembly 312, so that NO2 and SO2 in the waste gas are neutralized with the lye, thereby removing NO2 and SO2 in the waste gas. After the acidic waste gas is treated up to the standard, it flows from the first waste gas chamber 3111 into the waste gas channel 21 for cooling and dehumidification.

[0073] In some embodiments of the present invention, as Figure 1 and Figure 4 shown, the first housing 311 has an air inlet 3112 and an air outlet 3113 communicating with the first waste gas chamber 3111. The air inlet 3112 communicates with the first heat exchange channel 11, and the air outlet 3113 communicates with the waste gas channel 21. The air inlet 3112 is located below the air outlet 3113. The nozzle 3121 of the spraying assembly 312 is located between the air inlet 3112 and the air outlet 3113 and sprays the lye downward.

[0074] Thus, through such a setting, the flowing direction of the waste gas in the first waste gas chamber 3111 is opposite to the flowing direction of the lye, so that the waste gas entering the first waste gas chamber 3111 from the air inlet 3112 flows upward to form a countercurrent neutralization with the downward flowing lye, realizing the convective mass transfer absorption between the gas phase and the liquid phase, thereby further improving the acid-base neutralization efficiency of the waste gas and the lye, improving the purification efficiency of the acidic gas, and reducing the volume and operation cost of the lye spray tower 31.

[0075] In some embodiments of the present invention, as Figure 1 and Figure 4 shown, the lye spray tower 31 further includes a packing area 313. The packing area 313 is located in the first waste gas chamber 3111 and between the nozzle 3121 and the air inlet 3112, and is used to increase the contact area between the waste gas and the lye. Thus, the waste gas entering the first waste gas chamber 3111 from the air inlet 3112 flows upward and passes through the packing area 313, and the lye sprayed downward by the nozzle 3121 passes through the packing area 313. The packing area 313 can effectively increase the contact area and time between the waste gas and the lye, further realizing the convective mass transfer absorption between the gas phase and the liquid phase, further improving the absorption efficiency, and ensuring sufficient gas-liquid contact. At the same time, the packing area 313 can also make the waste gas and the lye more evenly distributed, avoid channeling phenomena, and ensure the effective mass transfer of the entire lye spray tower 31.

[0076] In some embodiments of the present invention, as Figure 1 and Figure 4As shown, the lye spray tower 31 further includes a demister 314. Among them, the demister 314 is located in the first housing 311 and between the spray head 3121 and the air outlet 3113, and is used to remove the liquid in the waste gas. It can be understood that the waste gas after acid-base neutralization treatment flows from the air outlet 3113 into the waste gas passage 21 after being removed of the liquid by the demister 314, and then the waste gas in the waste gas passage 21 is cooled and dehumidified by the condenser 2. Thus, the liquid in the waste gas can be effectively removed by the demister 314, ensuring that the waste gas entering the waste gas passage 21 is as dry as possible, reducing the burden on the condenser 2, and effectively reducing energy consumption and costs.

[0077] It should be noted that the form of the demister 314 includes but is not limited to a swirl plate demister 314, a baffle demister 314, a wire mesh demister 314, or a combination thereof.

[0078] In some embodiments, as Figure 1 and Figure 4 shown, the lye spray tower 31 further includes a circulating lye tank 315 and a chemical dosing assembly 316. The spray assembly 312 includes a circulating pump 3122 and nozzles. The circulating lye tank 315 is communicated with the lye spray tower 31. One section of the circulating pump 3122 is connected to the circulating lye tank 315, and the other end is connected to the spray head 3121. The spray head 3121 is located in the second housing 321. The chemical dosing assembly 316 is used to add lye to the circulating lye tank 315. Thus, the lye in the circulating lye tank 315 is pumped into the spray head 3121 by the circulating pump 3122. The lye is sprayed downward through the spray head 3121 and undergoes acid-base neutralization with the waste gas. The reacted lye carries pollutants and flows back to the circulating lye tank 315, and the chemical dosing assembly 316 adds lye to the circulating lye tank 315 to ensure the lye concentration in the circulating lye tank 315, maintain the concentration of the circulating sprayed lye, and ensure the continuous and stable operation of the lye spray tower 31.

[0079] Furthermore, the circulating lye tank 315 has a first water replenishing port 3151, a first drainage port 3152, and a lye replenishing port 3153. The lye replenishing port 3153 is communicated with the chemical dosing assembly 316. Thus, water is replenished into the circulating lye tank 315 through the first water replenishing port 3151 and lye is replenished into the circulating lye tank 315 through the lye replenishing port 3153 to ensure the lye concentration in the circulating lye tank 315. At the same time, the liquid in the circulating lye tank 315 can be emptied through the first drainage port 3152, which is convenient for cleaning and maintenance of the circulating lye tank 315.

[0080] Further, a pH meter 3154 is provided in the circulating lye tank 315 to detect the pH value of the liquid in the circulating lye tank 315, so as to ensure that the liquid in the circulating lye tank 315 is lye and the concentration of the lye, thereby ensuring that the lye sprayed by the spray head 3121 can effectively neutralize NO2 and SO2 in the waste gas, improving reliability. Specifically, when the pH meter 3154 detects that the pH value in the circulating lye tank 315 reaches the lower limit value, alkali liquid is added to the circulating lye tank 315 through the chemical dosing assembly 316 to ensure the concentration of the alkali liquid in the circulating lye tank 315.

[0081] In some embodiments, as Figure 1 and Figure 4 shown, the chemical dosing assembly 316 includes a medicine storage tank 3161, a stirrer 3162 and a chemical dosing pump 3163. The medicine storage tank 3161 has a feeding port 3164 and a second water replenishing port 3165. The stirrer 3162 is located inside the medicine storage tank 3161. The chemical dosing pump 3163 is respectively connected to the medicine storage tank 3161 and the circulating lye tank 315, and is used to pump the high-concentration alkali liquid mixed in the medicine storage tank 3161 into the circulating lye tank 315. Thus, solid alkali material is put into the medicine storage tank 3161 through the feeding port 3164, tap water is added to the medicine storage tank 3161 through the second water replenishing port 3165, and after the solid alkali material and tap water are stirred and mixed to form high-concentration alkali liquid by the stirrer 3162, the high-concentration alkali liquid mixed in the medicine storage tank 3161 is pumped into the circulating lye tank 315 through the chemical dosing pump 3163, so as to supplement alkali liquid to the circulating lye tank 315 and ensure the pH value of the alkali liquid in the circulating lye tank 315.

[0082] In some embodiments of the present invention, as Figure 1 and Figure 3 shown, the first treatment device 3 further includes an electrostatic precipitator 32. The electrostatic precipitator 32 is used to remove particulate matter in the waste gas and convert NOx in the waste gas into NO2. Thus, the waste gas flowing out from one end of the first heat exchange channel 11 away from the waste gas channel 21 enters the electrostatic precipitator 32. Under the action of a high-voltage electrostatic field, the waste gas is ionized, the particulate matter is charged, and moves directionally to the anode in the electric field, so that the particulate matter is separated from the gas, realizing dust removal. At the same time, strong oxidants such as O3 generated by ionization convert NOx into NO2, creating conditions for subsequent waste gas treatment and facilitating subsequent treatment of the waste gas.

[0083] In some embodiments, as Figure 1 and Figure 3As shown in the figure, the first processing device 3 includes an electrostatic precipitator 32 and an alkaline solution spray tower 31. Along the exhaust gas flow direction, the electrostatic precipitator 32 is located upstream of the alkaline solution spray tower 31. It can be understood that the exhaust gas flowing out from one end of the first heat exchange channel 11 away from the exhaust gas channel 21 enters the electrostatic precipitator 32. After the particulate matter in the exhaust gas is separated from the exhaust gas by the electrostatic precipitator 32 and the NOx in the exhaust gas is converted into NO2, the NO2 and SO2 in the exhaust gas are removed by the alkaline solution spray tower 31. After the acidic exhaust gas is treated to meet the standards, the exhaust gas flows into the exhaust gas channel 21.

[0084] Thus, through the synergistic effect of the electrostatic precipitator 32 and the alkaline solution spray tower 31, the denitrification effect is further improved, and the treatment effect of the first processing device 3 on the exhaust gas is improved. Compared with the high operating cost of the existing reduction method denitrification equipment, the present application has a lower cost while ensuring that the exhaust gas is treated to meet the standards, and the exhaust gas treatment system 100 has stable operating reliability.

[0085] In some embodiments, such as Figure 1 and Figure 4 As shown in the figure, the electrostatic precipitator 32 includes a second housing 321 and an electric field assembly 322. The second housing 321 has a second exhaust gas chamber 3211. The second exhaust gas chamber 3211 is connected in series between the first heat exchange channel 11 and the first exhaust gas chamber 3111. The electric field assembly 322 is located in the second exhaust gas chamber 3211 and includes a high-voltage package, a cathode wire, and an anode plate 3221. The high-voltage package is connected to the cathode wire, and there is a high-voltage-resistant ceramic between the cathode wire and the anode plate 3221.

[0086] Thus, by turning on the high-voltage package to make the electric field assembly 322 operate, the exhaust gas entering the second exhaust gas chamber 3211 is ionized. After the particulate matter is charged, it moves to the anode plate 3221 in the electric field and is thus adsorbed by the anode plate 3221, realizing the dust removal of the exhaust gas. At the same time, strong oxidants such as O3 generated by ionization convert NOx into NO2, creating conditions for subsequent exhaust gas treatment and facilitating the subsequent treatment of the exhaust gas. In addition, the high-voltage-resistant ceramic provided between the cathode wire and the anode plate 3221 insulates the cathode wire and the anode plate 3221, avoiding short circuits and improving the reliability of the electrostatic precipitator 32.

[0087] It should be noted that the anode plate 3221 is not limited to a plate-like structure and can also be a tubular anode.

[0088] In some embodiments, such as Figure 1 and Figure 4As shown, the electrostatic precipitator 32 further includes a second water tank 323 and a second cleaning pump head 324. The second cleaning pump head 324 includes a second high-pressure cleaning pump 3241 and a second pump head 3242. The second pump head 3242 is located within the second housing 23. One end of the second high-pressure cleaning pump 3241 is connected to the second water tank 323, and the other end is connected to the second high-pressure pump head. The second high-pressure pump head pumps the water in the second water tank 323 towards the second pump head 3242, and the second pump head 3242 sprays the water towards the anode plate 3221.

[0089] Thereby, the cleaning of the particulate matter adsorbed on the anode plate 3221 is realized, the adsorption effect of the anode plate 3221 is ensured, so as to ensure the dust removal effect of the electrostatic precipitator 32 on the waste gas, reduce the manual cleaning work, and ensure the long-term stable and effective operation of the equipment. At the same time, during the process of the electrostatic precipitator 32 treating the waste gas, water is sprayed towards the anode plate 3221 through the second pump head 3242, so that a continuous water film will be formed on the surface of the anode plate 3221, and the adsorbed particulate matter is instantaneously removed through the scouring action of the water film, avoiding the back corona and dust accumulation problems that are prone to occur when the dry electrostatic precipitator 32 treats high-humidity waste gas, being not restricted by the relative humidity of the waste gas, and having the advantages of less operation and maintenance, stability and high efficiency.

[0090] In addition, since the waste gas discharged from the waste gas equipment itself is a high-humidity gas, the electrostatic precipitator 32 can be used for dust removal without additional waste gas humidification. This wet electrostatic dust removal working method can also cooperate with the subsequent alkali liquid spray tower 31 to further improve the removal effect of NOx. And through the inventor's experimental verification, the particulate matter can be processed to the extent of visually smokeless.

[0091] Furthermore, the second cleaning pump head 324 further includes a second filter, which is located outside the second housing 23 and is used for filtering the water pumped from the second water tank 323 to the second pump head 3242, improving the cleanliness of the water pumped to the second pump head 3242, thereby avoiding frequent maintenance of the second pump head 3242 and reducing the maintenance cost.

[0092] In some embodiments, as Figure 1 and Figure 4 shown, the second cleaning assembly further includes a second return pipe 325. Wherein, one end of the second return pipe 325 is connected to the second waste gas chamber 3211, and the other end is connected to the second water tank 323. Thereby, after the second cleaning pump head 324 sprays the water in the second water tank 323 towards the anode plate 3221, the cleaned waste water in the second waste gas chamber 3211 is discharged into the second water tank 323 through the second confluence pipe, realizing the recycling of the waste water.

[0093] Further, when the waste gas treatment system 100 treats waste gas, the second return pipe 325 extends below the water level of the second water tank 323. Thus, by extending the second return pipe 325 below the water level of the second water tank 323, a water seal is achieved, thereby preventing air from entering the second waste gas chamber 3211 through the second return water pipe due to the negative pressure effect, resulting in waste gas dilution and improving the overall reliability.

[0094] In some embodiments, as Figure 2 shown, the second cleaning assembly further includes a second water supply pipe 326. The second water supply pipe 326 is connected to the second water tank 323 and is used to supply water to the second water tank 323. Thus, by supplying water to the second water tank 323 through the second water supply pipe 326, the water level in the second water tank 323 is ensured, so as to ensure that the second cleaning pump head 324 sprays the water in the second water tank 323 onto the anode plate 3221, improving the overall reliability.

[0095] Further, the second cleaning assembly further includes a second float valve. The second float valve is located in the second water tank 323 and is used to control the water level in the second water tank 323, further improving the reliability of the second cleaning assembly.

[0096] In some embodiments, as Figure 4 shown, the second cleaning assembly further includes a second sewage discharge pipe 327. The second sewage discharge pipe 327 is connected to the second water tank 323 and is used to empty the second water tank 323. Thus, the second water tank 323 can be emptied through the second sewage discharge pipe 327, facilitating cleaning, maintenance, and replacement of the water in the second water tank 323, and improving the reliability of the second cleaning assembly.

[0097] Further, the second cleaning assembly further includes a second return pipe 325. One end of the second return pipe 325 is connected to the second waste gas chamber 3211, and the other end is connected to the second water tank 323. Thus, after the second cleaning pump head 324 sprays the water in the second water tank 323 onto the anode plate 3221, the cleaned waste water in the second waste gas chamber 3211 is discharged into the second water tank 323 through the second confluence pipe, realizing the recycling of waste water, and the second water tank 323 can be emptied through the second sewage discharge pipe 327, facilitating cleaning, maintenance, and replacement of the water in the second water tank 323, and improving the reliability of the second cleaning assembly.

[0098] In some embodiments of the present invention, as Figure 1As shown, the exhaust gas treatment system 100 further includes a second treatment device 4. The second treatment device 4 is communicated with one end of the second heat exchange channel 121 far away from the exhaust gas channel 21 for treating the exhaust gas. It can be understood that the exhaust gas after being cooled and dehumidified by the condensing member 22 in the exhaust gas channel 21 flows through the second heat exchange channel 121 to be heated and then flows to the second treatment device 4 to meet the temperature and humidity requirements of the second treatment device 4 for the exhaust gas, ensure the treatment effect of the second treatment device 4 on the exhaust gas, and improve the reliability of the exhaust gas treatment system 100.

[0099] In some embodiments of the present invention, as Figure 1 shown, the second treatment device 4 includes an adsorption assembly 41. The adsorption assembly 41 is used for adsorbing VOCs in the exhaust gas. It can be understood that the adsorption assembly 41 for adsorbing VOCs in the exhaust gas has certain requirements for the temperature and humidity of the exhaust gas. The exhaust gas after being cooled and dehumidified by the condensing member 22 in the exhaust gas channel 21 flows through the second heat exchange channel 121 to be heated and then flows to the adsorption assembly 41 to meet the temperature and humidity requirements of the adsorption assembly 41 for the exhaust gas, ensure the adsorption effect of the adsorption assembly 41 on VOCs, separate VOCs from the exhaust gas, ensure the exhaust gas meets the standards, and improve the reliability of the exhaust gas treatment system 100.

[0100] It should be noted that the adsorption assembly 41 is a general term for processes, including but not limited to disposable activated carbon adsorption, activated carbon adsorption concentration - combustion, zeolite (fixed bed or rotary wheel) adsorption concentration - combustion, and other adsorption regeneration processes, and the types of adsorbents are not limited in this application.

[0101] When the exhaust gas treatment system 100 of the present application treats the exhaust gas generated by the power battery safety test, since most VOCs are decomposed and oxidized during the fire, the volatilized NMHC is not high, and the adsorption assembly 41 can be used to treat the large - volume and low - concentration organic exhaust gas to ensure that the discharged exhaust gas meets the standards.

[0102] Furthermore, as Figures 1 - 5 shown, there is a first treatment device 3 between the first heat exchange channel 11 and the exhaust gas channel 21. The first treatment device 3 includes an alkali liquor spray tower 31, and the alkali liquor spray tower 31 is used for removing NO2 and SO2 in the exhaust gas.

[0103] It can be understood that the waste gas flowing out of one end of the first heat exchange channel 11 away from the waste gas channel 21 is neutralized by the lye in the lye spray tower 31 to remove NO2 and SO2 in the waste gas. At this time, the relative humidity of the waste gas is relatively high. If the relative humidity of the waste gas is directly reduced by raising the temperature, the temperature of the waste gas will be too high, which is not conducive to the adsorption effect of the adsorption component 41 on VOCs, and a cooling device needs to be additionally provided to meet the temperature requirements of the adsorption component 41. Therefore, in this application, the waste gas flowing out of the lye spray tower 31 is cooled and dehumidified by the condenser 2 for the waste gas in the waste gas channel 21, and then the waste gas is heated by the second heat exchange channel 121 and flows into the adsorption component 41, meeting the temperature and humidity requirements of the adsorption component 41 for the waste gas, so as to efficiently separate VOCs from the waste gas and improve the reliability of the waste gas treatment system 100. At the same time, the heat recycling of the waste gas in the waste gas treatment system 100 is realized, so as to achieve the purpose of energy saving, effectively reduce the cost of the waste gas treatment system 100, and ensure the long-term stable and effective operation of the waste gas treatment system 100.

[0104] In some embodiments of the present invention, as Figure 1 shown, the waste gas treatment system 100 further includes a centrifugal fan 5. Among them, the centrifugal fan 5 drives the waste gas to flow through the first heat exchange channel 11, the waste gas channel 21 and the second heat exchange channel 121 in sequence. Thus, the centrifugal fan 5 provides power for the transportation of the waste gas, ensuring that the waste gas flows through the first heat exchange channel 11, the waste gas channel 21 and the second heat exchange channel 121 in sequence, and improving the reliability and stability of the waste gas treatment system 100.

[0105] At the same time, through the continuous suction of the centrifugal fan 5, the entire waste gas treatment system 100 is in a slightly negative pressure state. Such a design makes the outside air be sucked into the waste gas treatment system 100 when the seal fails, rather than allowing the untreated waste gas to leak out, thereby avoiding the leakage of untreated waste gas to the surrounding environment. Further, the centrifugal fan 5 is located on the side of the condenser 2 away from the waste heat recovery device 1, further ensuring that the waste gas treatment system 100 is in a slightly negative pressure state and avoiding the leakage of untreated waste gas to the surrounding environment.

[0106] In some embodiments of the present invention, as Figure 1 shown, the waste gas treatment system 100 further includes a chimney 6, and the chimney 6 is used to discharge the qualified waste gas. Thus, the treated qualified waste gas is discharged high into the air through the chimney 6, so that the ground pollutant concentration can be reduced by using the atmospheric diffusion ability.

[0107] In some embodiments, as Figure 1As shown, the waste gas treatment system 100 includes a total water inlet 71 and a total drain. The first water replenishing port 3151, the first water replenishing pipe 144, the second water replenishing port 3165 and the second water replenishing pipe 326 are respectively communicated with the total water inlet 71, so that the total water inlet 71 conveys clean tap water to the first water replenishing port 3151, the first water replenishing pipe 144, the second water replenishing port 3165 and the second water replenishing pipe 326 respectively. The condensate drain port 231, the first sewage discharge pipe 145, the first drain port 3152 and the second sewage discharge pipe 327 are respectively communicated with the total drain, so that the condensate drain port 231, the first sewage discharge pipe 145, the first drain port 3152 and the second sewage discharge pipe 327 discharge waste water to the drain respectively, thereby realizing unified water supply and waste water discharge.

[0108] The following refers to Figures 1 - 5 Describe in detail the waste gas treatment system 100 of the specific embodiments of the present invention. It can be understood that the following description is only an exemplary illustration and cannot be construed as a limitation of the invention.

[0109] The waste gas treatment system 100 includes a waste heat recovery device 1, a condenser 2, a first treatment device 3 and a second treatment device 4. The waste heat recovery device 1 has a first heat exchange channel 11 and a second heat exchange channel 121 that exchange heat with each other. The condenser 2 has an exhaust gas channel 21 and a condensing member 22. Both ends of the exhaust gas channel 21 are respectively communicated with the first heat exchange channel 11 and the second heat exchange channel 121. One end of the first heat exchange channel 11 away from the exhaust gas channel 21 is used to receive exhaust gas, and the condensing member 22 is used to cool the exhaust gas in the exhaust gas channel 21. The first treatment device 3 is located between the first heat exchange channel 11 and the exhaust gas channel 21. The first treatment device 3 includes an electrostatic precipitator 32 and an alkali liquid spray tower 31. Along the exhaust gas flow direction, the electrostatic precipitator 32 is located upstream of the alkali liquid spray tower 31. The electrostatic precipitator 32 is used to remove particulate matter in the exhaust gas and convert NOx in the exhaust gas into NO2, and the alkali liquid spray tower 31 is used to remove NO2 and SO2 in the exhaust gas. The second treatment device 4 is communicated with one end of the second heat exchange channel 121 away from the exhaust gas channel 21. The second treatment device 4 includes an adsorption assembly 41, and the adsorption assembly 41 is used to adsorb VOCs in the exhaust gas.

[0110] Thus, the high-temperature waste gas enters the first heat exchange channel 11 from one end far away from the waste gas channel 21, exchanges heat with the waste gas in the second heat exchange channel 121, and then enters the electrostatic precipitator 32. After the particulate matter in the waste gas is separated from the waste gas by the electrostatic precipitator 32 and the NOx in the waste gas is converted into NO2, the NO2 and SO2 in the waste gas are removed by the alkali liquor spray tower 31. After the acidic waste gas is treated to meet the standards, the waste gas flows into the waste gas channel 21. After the waste gas in the waste gas channel 21 is cooled and dehumidified by the condensing member 22, it flows through the second heat exchange channel 121 again, is heated up, and then flows to the adsorption assembly 41 to meet the temperature and humidity requirements of the adsorption assembly 41 for the waste gas, so as to separate the VOCs from the waste gas, ensure that the waste gas treatment meets the standards, and improve the reliability of the waste gas treatment system 100.

[0111] In this application, the effective control of pollutants is achieved through the combination of the electrostatic precipitator 32, the alkali liquor spray tower 31 and the adsorption assembly 41, ensuring that the discharged waste gas meets the standards. And through the setting of the waste heat recovery device 1 and the condenser 2, while recovering waste heat, the conditions required for the normal operation of the waste gas treatment system 100 are ensured, ensuring the stable operation of the waste gas treatment system 100, and having significant environmental benefits.

[0112] In addition, the waste gas treatment system 100 of this application can effectively avoid the problems in the prior art, such as the problem of bag clogging caused by the combination of cloth bags and spraying, resulting in the failure of the filter bags, and the problem that the gas flowing to the adsorption assembly is high-temperature and high-humidity gas, without control measures for temperature and humidity, resulting in the failure of activated carbon adsorption.

[0113] Specifically, the waste gas in the waste gas channel 21 is cooled by the condensing member 22 of the condenser 2, so that the temperature of the waste gas in the waste gas channel 21 is controlled to the dew point of 15 °C and then flows to the second heat exchange channel 121. After that, after the waste heat recovery of the waste gas in the first heat exchange channel 11 and the heat exchange with the waste gas in the second heat exchange channel 121, the temperature of the waste gas flowing out of one end of the second heat exchange channel 121 far away from the waste gas channel 21 rises to 30 °C and the relative humidity is controlled at about 40%, meeting the working requirements of the adsorption assembly 41 for both temperature and relative humidity.

[0114] Other components of the waste gas treatment system 100 according to the embodiments of the present invention, such as the waste heat recovery device 1, the condenser 2, the electrostatic precipitator 32, the alkali liquor spray tower 31, the adsorption assembly 41 and the centrifugal fan 5, etc., as well as the operations, are known to those of ordinary skill in the art and will not be described in detail here.

[0115] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0116] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. An exhaust gas treatment system, characterized in that, Comprising: A waste heat recovery device (1), the waste heat recovery device (1) having a first heat exchange channel (11) and a second heat exchange channel (121) that exchange heat with each other; A condenser (2), the condenser (2) having an exhaust gas channel (21) and a condensing member (22), both ends of the exhaust gas channel (21) being respectively communicated with the first heat exchange channel (11) and the second heat exchange channel (121), one end of the first heat exchange channel (11) away from the exhaust gas channel (21) being used for receiving exhaust gas, and the condensing member (22) being used for cooling the exhaust gas in the exhaust gas channel (21).

2. The exhaust gas treatment system according to claim 1, characterized in that The waste heat recovery device (1) includes: A first outer shell (13); A tube bundle (12), the tube bundle (12) being located inside the first outer shell (13), the second heat exchange channel (121) being formed inside the tube bundle (12), and the first heat exchange channel (11) being formed between the tube bundle (12) and the first outer shell (13).

3. The exhaust gas treatment system according to claim 2, characterized in that The waste heat recovery device (1) further includes: A first cleaning assembly (14), at least part of the first cleaning assembly (14) being located inside the first outer shell (13), for cleaning the outer wall surface of the tube bundle (12) and the inner wall surface of the first outer shell (13).

4. The exhaust gas treatment system according to claim 3, characterized in that: The first cleaning assembly (14) includes: A first water tank (141), the first water tank (141) being located outside the first outer shell (13); A first cleaning pump head (142), part of the first cleaning pump head (142) being located inside the first outer shell (13), for spraying the water in the first water tank (141) onto the outer wall surface of the tube bundle (12) and the inner wall surface of the first outer shell (13).

5. The exhaust gas treatment system according to claim 4, characterized in that, The first cleaning assembly (14) further includes: A first return pipe (143), one end of the first return pipe (143) being connected to the first heat exchange channel (11), and the other end being connected to the first water tank (141); And / or, a first water supply pipe (144), the first water supply pipe (144) being connected to the first water tank (141), for supplying water to the first water tank (141); And / or, a first sewage discharge pipe (145), the first sewage discharge pipe (145) being connected to the first water tank (141), for emptying the first water tank (141).

6. The exhaust gas treatment system according to claim 1, characterized in that, The waste heat recovery device (1) further includes: A differential pressure gauge (15), the differential pressure gauge (15) being used for detecting the degree of blockage of the first heat exchange channel (11).

7. The exhaust gas treatment system according to claim 1, characterized in that, The condenser (2) includes: A second outer shell (23), the condensing member (22) being a condensing tube and being located inside the second outer shell (23), and the exhaust gas channel (21) being formed between the second outer shell (23) and the condensing tube.

8. The exhaust gas treatment system according to claim 7, characterized in that: The second outer shell (23) has a condensate discharge port (231), the condensate discharge port (231) being used for discharging the condensate water inside the second outer shell (23).

9. The exhaust gas treatment system according to claim 1, characterized in that: There is a first treatment device (3) between the first heat exchange channel (11) and the exhaust gas channel (21), the first treatment device (3) being used for treating the exhaust gas.

10. The exhaust gas treatment system according to claim 9, characterized in that, The first treatment device (3) includes: The alkali solution spray tower (31) is used to remove NO2 and SO2 in the waste gas.

11. The exhaust gas treatment system according to claim 9, characterized in that, The first processing device (3) further comprises: An electrostatic precipitator (32) is used to remove particulate matter in the exhaust gas and convert NOx in the exhaust gas into NO2.

12. The exhaust gas treatment system according to claim 1, wherein, Also includes: A second treatment device (4), the second treatment device (4) is connected to an end of the second heat exchange channel (121) away from the exhaust gas channel (21), and is used to treat the exhaust gas.

13. The exhaust gas treatment system according to claim 12, characterized in that: The second processing device (4) comprises: An adsorption component (41) is used to adsorb VOCs in the exhaust gas.

14. The exhaust gas treatment system according to claim 1, characterized in that, Also includes: A centrifugal fan (5) drives the exhaust gas to flow sequentially through the first heat exchange channel (11), the exhaust gas channel (21), and the second heat exchange channel (121).

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