Waste gas recovery system for building material monomer product combustion test equipment

Abstract

The invention relates to the technical field of waste gas recovery, in particular to a waste gas recovery system for building material monomer product combustion test equipment. The first condensation mechanism comprises a primary condensation area and a discharge condensation area, the primary condensation area is used for carrying out primary condensation separation on the waste gas, part of the waste gas is condensed to form condensate, part of the waste gas enters the discharge condensation area, the discharge condensation area is used for carrying out secondary condensation separation on the waste gas, and the gas reaching the discharge standard is discharged through a gas outlet; the second condensation mechanism is used for carrying out secondary condensation separation on the waste gas following the condensate; the catalytic oxidation mechanism is located on one side of the output end of the second condensation mechanism and used for conducting catalytic oxidation on condensate to form gas, and the gas is sequentially conveyed to the second condensation mechanism and the discharging condensation area. The waste gas treatment device has the effects of improving the waste gas treatment effect and reducing air pollution.

Description

Technical Field

[0001] The present application relates to the technical field of waste gas recovery, and in particular to a waste gas recovery system for a building material monomer product combustion test equipment. Background Art

[0002] In recent years, with the continuous improvement of global environmental protection awareness and the rapid development of the construction industry, the attention to the safety and environmental performance of building materials has reached an unprecedented level. Especially in the combustion performance test of building materials, since such tests will inevitably produce a large amount of harmful exhaust gas, these improperly treated exhaust gases will not only pose a serious threat to the surrounding environment, but also seriously affect the respiratory health and quality of life of laboratory workers and even surrounding residents, thereby exacerbating ecological and environmental problems while also bringing increasingly severe occupational safety challenges.

[0003] The gas from the combustion equipment has high heat. At present, the exhaust gas treatment mechanism in the single combustion experimental equipment condenses the exhaust gas through the second condenser. The generated condensate is catalytically oxidized under the action of the catalyst and the flame retardant, and then the catalytically oxidized gas is discharged. However, there is still a possibility of exhaust gas in the discharged gas, and the exhaust gas treatment capacity is low, which is easy to cause air pollution. Summary of the invention

[0004] In order to improve the waste gas treatment effect and reduce air pollution, the present application provides a waste gas recovery system for a building material monomer product combustion test equipment.

[0005] The present application provides an exhaust gas recovery system for a building material monomer product combustion test equipment, which adopts the following technical solution: An exhaust gas recovery system for a building material monomer product combustion test equipment comprises: A casing, wherein the casing is provided with an air inlet and an air outlet, the air inlet is connected to an air inlet pipe, the air inlet pipe is provided with a fan, and the fan is used to transport the exhaust gas into the casing; The first condensation mechanism includes a preliminary condensation zone and a discharge condensation zone, wherein the preliminary condensation zone is used to perform preliminary condensation and separation on the exhaust gas, wherein part of the exhaust gas is condensed to form condensate, and part of the exhaust gas enters the discharge condensation zone, wherein the discharge condensation zone performs further condensation and separation on the exhaust gas, so that the gas that meets the emission standard is discharged through the gas outlet; a second condensing mechanism, connected to the first condensing mechanism, for performing secondary condensation separation on the exhaust gas following the condensate; The catalytic oxidation mechanism is located at the output end side of the second condensing mechanism, and is used for catalytically oxidizing the condensate to form gas, and sequentially transporting the gas to the second condensing mechanism and the exhaust condensation area.

[0006] By adopting the above technical scheme, the exhaust gas enters the casing through the exhaust port, and is condensed and separated through the preliminary condensation area in the first condensation mechanism, so that the condensate is separated from the gas that can be discharged. The condensate after the preliminary separation enters the second condensation mechanism, and the gas that can be discharged enters the exhaust condensation area for re-condensation and separation, thereby improving the quality of the gas that can be discharged to meet the standards. The condensate condensed in the discharge condensation area enters the second condensation mechanism, so that the condensate gathers in the second condensation mechanism, and the gas that enters the second condensation mechanism together with the condensate is subjected to secondary condensation and separation from the exhaust gas, so that the gas that meets the standards is discharged from the gas outlet. The condensate in the second condensation mechanism is moved to the catalytic oxidation mechanism for catalytic oxidation. The gas after catalytic oxidation passes through the second condensation mechanism and the discharge condensation area. If the gas meets the emission standard, the gas is discharged from the gas outlet. If it does not meet the emission standard, the condensate is formed and enters the catalytic oxidation mechanism for oxidation again until the gas meets the standard, thereby improving the exhaust gas treatment effect and reducing air pollution.

[0007] Optionally, the first condensing mechanism includes a first layer plate, a second layer plate and a first condensing tube, the first layer plate is connected to the casing, the second layer plate is connected to the casing, a condensation layer is formed between the first layer plate and the second layer plate, the first condensing tube runs through the first layer plate and the second layer plate, the first condensing tube is connected to the second condensing mechanism, the first layer plate is connected to an isolation plate, and the condensation layer is separated into the preliminary condensation area and the discharge condensation area by the isolation plate.

[0008] By adopting the above technical solution, the exhaust gas enters the first condenser tube, condensate is placed in the condensation layer, and the exhaust gas flowing in the first condenser tube passes through the condensation layer for heat exchange, so that the exhaust gas is condensed and separated in the condensation layer to form condensate. Under the influence of gravity, the condensate falls into the second condensation mechanism, and the gas that can be discharged is preliminarily separated, thereby improving the condensation efficiency of the exhaust gas and further improving the exhaust gas treatment effect.

[0009] Optionally, the second condensing mechanism includes a third layer plate and a second condensing tube, the third layer plate is connected to the casing, a condensing chamber is formed between the third layer plate and the second layer plate, the first condensing tube is connected to the condensing chamber, and the second condensing tube is installed in the condensing chamber.

[0010] By adopting the above technical scheme, as the exhaust gas circulates, part of the exhaust gas is not condensed and separated, and enters the condensation chamber, and the condensate falls into the condensation chamber under the action of gravity. The condensation chamber is cooled by the second condenser tube, so that the exhaust gas is further condensed, the condensate increases, and the exhaust gas on the surface of the condensate falling from the preliminary condensation area is condensed, so that the volume of the condensate increases and the volume of the condensation chamber is large, so that the condensate is secondary condensed in the second condensation mechanism, thereby improving the exhaust gas treatment effect while reducing the possibility of the condensate blocking the first condensation tube.

[0011] Optionally, a filter element is provided on a side of the third plate close to the second plate, and the filter element is inclined and located at the bottom of the discharge condensation area.

[0012] By adopting the above technical solution, the condensate falling from the emission condensation zone hits the filter element, and the filter element is arranged at an angle, so that the condensate rolls to the input end of the catalytic oxidation mechanism for catalytic oxidation. At the same time, it is convenient for the gas output from the output end of the catalytic oxidation mechanism to enter the emission condensation zone through the filter element, and the possibility of the condensate passing through the second condensation mechanism directly entering the output end of the catalytic oxidation mechanism is reduced, thereby improving the exhaust gas treatment effect.

[0013] Optionally, the filter element adopts an elastic filtering structure.

[0014] By adopting the above technical solution, when the condensate falls to the top of the filter element, the condensate is buffered to reduce the possibility of condensate breakage, and the condensate is bounced off the filter element to facilitate entering the catalytic oxidation mechanism. When there are fine condensates stuck in the filter element, the gas output from the catalytic oxidation mechanism pushes the fine condensates to facilitate bouncing off the filter element under the impact of other condensates, thereby entering the catalytic oxidation mechanism, further improving the exhaust gas treatment efficiency.

[0015] Optionally, the catalytic oxidation mechanism is provided with a heat recovery zone, and the heat recovery zone is used to recover the heat generated in the preliminary condensation zone and transfer the heat to the condensate.

[0016] By adopting the above technical solution, the waste gas has high heat when it is output from the combustion equipment. By setting up a heat recovery area, the heat of the waste gas can be reused, thereby improving energy saving and reducing the generation and waste of other waste heat.

[0017] Optionally, a preheating zone is provided between the second condensing mechanism and the heat recovery zone, and the preheating zone is used to recover waste heat from the discharge condensing zone, the second condensing mechanism and the heat recovery zone, and to preheat the condensate for catalytic oxidation.

[0018] By adopting the above technical solution, the condensate is preheated. When the condensate enters the catalytic oxidation mechanism for oxidation, it can be quickly sublimated, thereby improving the oxidation effect and further improving the exhaust gas treatment effect.

[0019] Optionally, the casing is connected to an air pipe, fresh air flows through the air pipe, and the air pipe is used to transport the fresh air to the catalytic oxidation mechanism.

[0020] By adopting the above technical solution, the oxidation efficiency of the gas in the catalytic oxidation mechanism is improved, so that the gas is oxidized quickly.

[0021] Optionally, the flow direction of the fresh air is perpendicular to the flow direction of the exhaust gas.

[0022] By adopting the above technical solution, the activity of the gas is increased, thereby improving the oxidation efficiency.

[0023] Optionally, the housing includes an upper shell, a lower shell and a fixing assembly, and the upper shell and the lower shell are assembled and connected via the fixing assembly.

[0024] By adopting the above technical solution, it is convenient to repair and replace the internal components of the casing.

[0025] In summary, the present application includes at least one of the following beneficial technical effects: 1. Exhaust gas enters the casing through the exhaust port, passes through the preliminary condensation area in the first condensation mechanism for condensation and separation, thereby separating the condensate from the gas that can be discharged. The condensate after preliminary separation enters the second condensation mechanism, and the gas that can be discharged enters the exhaust condensation area for re-condensation and separation, thereby improving the quality of the gas that can be discharged to meet the standards. The condensate condensed in the discharge condensation area enters the second condensation mechanism, so that the condensate gathers in the second condensation mechanism, and the gas that enters the second condensation mechanism together with the condensate is subjected to secondary condensation and separation from the exhaust gas, so that the gas that meets the standards is discharged from the gas outlet. The condensate in the second condensation mechanism moves to the catalytic oxidation mechanism for catalytic oxidation. The gas after catalytic oxidation passes through the second condensation mechanism and the discharge condensation area. If the gas meets the emission standard, the gas is discharged from the gas outlet. If it does not meet the emission standard, the condensate is formed and enters the catalytic oxidation mechanism for oxidation again until the gas meets the standard, thereby improving the exhaust gas treatment effect and reducing air pollution. 2. As the exhaust gas circulates, part of the exhaust gas is not condensed and separated, and enters the condensation chamber, and the condensate falls into the condensation chamber under the action of gravity, and the condensation chamber is cooled by the second condensation tube, so that the exhaust gas is further condensed, the condensate increases, and the exhaust gas on the surface of the condensate falling from the preliminary condensation area is condensed, so that the volume of the condensate increases, the volume of the condensation chamber is large, and the condensate is secondary condensed in the second condensation mechanism, thereby improving the exhaust gas treatment effect and reducing the possibility of the condensate blocking the first condensation tube; 3. The heat of the waste gas output from the combustion equipment is high. By setting up a heat recovery area, the heat of the waste gas can be reused to improve energy saving and reduce the generation and waste of other waste heat. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure in the embodiment of the present application.

[0027] Figure 2 It is a schematic diagram of the internal structure of the casing in the embodiment of the present application.

[0028] Figure 3 It is a schematic diagram of the structure of the fixed component in the embodiment of the present application.

[0029] Description of reference numerals: 1. Casing; 11. Air inlet pipe; 12. Fan; 13. Air outlet pipe; 14. Observation window; 15. Upper shell; 151. Insertion port; 16. Lower shell; 161. Fixing slot; 17. Fixing assembly; 171. Sliding member; 1711. First sliding rod; 1712. Locking slot; 172. First spring; 173. Insertion member; 174. Second spring; 175. Lifting member; 1751. Second sliding rod; 176. Connecting member; 1761 , sliding groove; 177, locking piece; 2, first condensation mechanism; 21, preliminary condensation zone; 22, discharge condensation zone; 23, first layer plate; 24, second layer plate; 25, first condensation tube; 26, isolation plate; 3, second condensation mechanism; 31, third layer plate; 32, second condensation tube; 33, filter element; 4, catalytic oxidation mechanism; 5, heat recovery zone; 51, fourth layer plate; 6, preheating zone; 61, additional layer plate; 7, through pipe; 8, air pipe. DETAILED DESCRIPTION

[0030] The following is combined with Figure 1-3 This application is described in further detail.

[0031] The embodiment of the present application discloses an exhaust gas recovery system for a building material monomer product combustion test equipment.

[0032] Reference Figure 1 and Figure 2 A waste gas recovery system for a building material monomer product combustion test equipment comprises a casing 1, an air inlet is provided on the top wall of the casing 1, an air inlet pipe 11 is connected to the air inlet, a fan 12 is arranged on the air inlet pipe 11, and the fan 12 is used to transport the waste gas generated in the combustion equipment into the casing 1, an air outlet is provided on the side wall of the casing 1, and the air outlet is located at the top of the casing 1, and an air outlet pipe 13 is connected to the air outlet, and a first condensing mechanism 2, a second condensing mechanism 3 and a catalytic oxidation mechanism 4 are arranged in sequence from the top to the bottom of the casing 1, and the first condensing mechanism 2 comprises a preliminary condensation area 21 and a discharge condensation area 22 The preliminary condensation zone 21 is used to perform preliminary condensation and separation on the exhaust gas generated from the combustion equipment. Part of the exhaust gas condenses to form condensate, and part of the exhaust gas enters the discharge condensation zone 22. The discharge condensation zone 22 condenses and separates the exhaust gas again, so that the gas that meets the emission standard is discharged through the outlet pipe 13. The second condensation mechanism 3 is connected to the first condensation mechanism 2, and is used to perform secondary condensation and separation on the exhaust gas following the condensate. The catalytic oxidation mechanism 4 is located on one side of the output end of the second condensation mechanism 3, and is used to catalytically oxidize the condensate to form gas, and transport it to the second condensation mechanism 3 and the discharge condensation zone 22 in sequence.

[0033] When exhaust gas is generated in the combustion equipment, the fan 12 is started, and the fan 12 transports the exhaust gas to the casing 1 through the air inlet pipe 11. The exhaust gas passes through the preliminary condensation area 21 for heat exchange, so that part of the exhaust gas is condensed to form condensate, and enters the second condensation mechanism 3 under the action of gravity, and part of the exhaust gas enters the discharge condensation area 22 for re-condensation and separation, and the qualified gas that can be discharged is separated, and the gas is discharged from the outlet pipe 13. At the same time, the condensate condensed in the discharge condensation area 22 falls into the second condensation mechanism 3 for secondary condensation, and then the condensate after the secondary condensation enters the catalytic oxidation mechanism 4 for catalytic oxidation. The catalytically oxidized gas passes through the second condensation mechanism 3 for condensation and separation, and then enters the discharge condensation area 22 for condensation and separation, so as to obtain the qualified gas that can be discharged, which is discharged from the outlet pipe 13. The condensate generated after condensation enters the catalytic oxidation mechanism 4 again for catalytic oxidation, forming a closed catalytic oxidation process, reducing the possibility of exhaust gas contained in the discharged gas, thereby improving the exhaust gas treatment effect and reducing the possibility of air pollution.

[0034] The first condensing mechanism 2 includes a first layer plate 23, a second layer plate 24 and a first condensing tube 25. The side wall of the first layer plate 23 is fixedly connected to the inner wall of the casing 1, and the side wall of the second layer plate 24 is fixedly connected to the inner wall of the casing 1. A condensation layer is formed between the first layer plate 23 and the second layer plate 24. The first condensing tube 25 runs through the first layer plate 23 and the second layer plate 24. The first condensing tube 25 is connected to the second condensing mechanism 3. Condensate flows in the condensation layer. When the exhaust gas flows into the second condensing mechanism 3 through the first condensing tube 25, the exhaust gas exchanges heat with the condensate through the first condensing tube 25. The first layer plate 23 is connected to an isolation plate 26. The condensation layer is separated into a preliminary condensation area 21 and a discharge condensation area 22 by the isolation plate 26. In this embodiment, the condensate in the condensation layer is provided by the external environment, and the condensate can be pumped to the preliminary condensation area 21 and the discharge condensation area 22 respectively by a pump.

[0035] In order to reduce the possibility of exhaust gas being blocked in the first condenser 25, the pipe in the first condenser 25 extends downward, such as a vertically downward pipe, a vertically arranged pipe with a small curvature and a snake-like opening, etc., which can be arranged according to specific circumstances.

[0036] The second condensing mechanism 3 includes a third layer plate 31 and a second condensing tube 32. The outer wall of the third layer plate 31 is fixedly connected to the inner wall of the casing 1. A condensing chamber is formed between the third layer plate 31 and the second layer plate 24. The first condensing tube 25 is connected to the condensing chamber. The second condensing tube 32 is installed in the condensing chamber. Condensate flows in the second condensing tube 32. In this embodiment, the condensate in the second condensing tube 32 is provided by the external environment. The second condensing tube 32 provides a condensing range for the condensing chamber, which is convenient for heat exchange with heat in the exhaust gas.

[0037] In order to facilitate the condensate falling from the discharge condensation area 22 to enter the catalytic oxidation mechanism 4, one end of the third layer plate 31 located below the discharge condensation area 22 is inclined, and a filter element 33 is provided on the side of the third layer plate 31 close to the second layer plate 24. The filter element 33 is located below the discharge condensation area 22, and the filter element 33 is arranged along the inclined surface of the third layer plate 31, so that the filter element 33 is inclined.

[0038] The filter element 33 adopts an elastic filtering structure. Specifically, the filter element 33 can adopt an elastic filtering structure of a floc dynamic membrane.

[0039] The catalytic oxidation mechanism 4 is provided with a heat recovery zone 5, which is connected to the preliminary condensation zone 21 through a pipeline. The heat recovery zone 5 is used to recover the heat generated by the preliminary condensation zone 21 and transfer the heat to the condensate. After the condensate in the preliminary condensation zone 21 exchanges heat with the heat in the exhaust gas, the condensate with heat is transferred to the heat recovery zone 5 through the pipeline. The heat recovery zone 5 transfers the heat to the condensate, thereby sublimating the condensate, increasing the heat of the gas, and improving the catalytic oxidation efficiency of the gas.

[0040] A preheating zone 6 is arranged between the condensing chamber and the heating chamber. The preheating zone 6 includes an additional layer plate 61. The additional layer plate 61 is located at the bottom of the third layer plate 31. The outer wall of the additional layer plate 61 is fixedly connected to the inner wall of the casing 1 and one side of the isolation plate 26. The additional layer plate 61 is interspersed with a through pipe 7 for moving the condensate, so that a closed preheating chamber is formed between the third layer plate 31, the additional layer plate 61, the casing 1, the isolation plate 26 and the through pipe 7. The preheating chamber is used to recover the waste heat of the discharge condensation zone 22 and the second condensation mechanism 3, and preheat the condensate for catalytic oxidation.

[0041] The heat recovery area 5 includes a fourth layer plate 51, which is located at the bottom of the additional layer plate 61. The outer wall of the fourth layer plate 51 is connected to the inner wall of the casing 1 and the side of the isolation plate 26 close to the additional layer plate 61. The through pipe 7 is inserted into the fourth layer plate 51 to form a closed heating cavity. The heating cavity is connected to the preliminary condensation area 21 through a pipeline. Both ends of the pipeline are connected to the condensation cavity and the catalytic oxidation mechanism 4. When the condensate falls from the condensation cavity into the pipeline, the condensate in the heating cavity exchanges heat with the condensate to sublime the condensate.

[0042] In order to improve the preheating effect of the preheating zone 6, the heating cavity is connected to the preheating cavity through a pipeline, and the condensate whose temperature is reduced after the superheat exchange is transported to the preheating cavity for utilization, thereby improving the preheating effect of the condensate while reducing energy consumption. The condensate used in the preheating zone 6 can be discharged.

[0043] The casing 1 is connected to an air pipe 8, through which fresh air flows. The air pipe 8 is used to transport the fresh air to the catalytic oxidation mechanism 4. The flow direction of the fresh air is perpendicular to the flow direction of the exhaust gas, so that the air is fully in contact with the sublimated gas, thereby improving the catalytic oxidation effect.

[0044] Reference Figure 2 and Figure 3 In order to facilitate viewing of the internal situation of the casing 1, an observation window 14 is provided on the outer wall of the casing 1. The casing 1 includes an upper shell 15, a lower shell 16 and a fixing assembly 17 from top to bottom. The outer walls of the upper shell 15 and the lower shell 16 are both annular. There are multiple observation windows 14, which are respectively provided on the upper shell 15 and the lower shell 16. The upper shell 15 and the lower shell 16 are assembled and connected by a fixing assembly 17. It can be understood that the casing 1 can be assembled from multiple shells and can be set according to actual needs.

[0045] The lower shell 16 is provided with a fixed groove 161, and the fixed assembly 17 includes a sliding member 171, a first spring 172, a plug-in 173, a second spring 174, a lifting member 175, a connecting member 176 and a locking member 177. The sliding member 171 is slidably connected to the groove wall of the fixed groove 161, the sliding member 171 is fixedly connected to one end of the first spring 172, the end of the first spring 172 away from the sliding member 171 is fixedly connected to the groove wall of the fixed groove 161, the plug-in 173 is vertically slidably connected to a side of the sliding member 171 away from the first spring 172, one end of the second spring 174 is fixedly connected to the bottom wall of the plug-in 173, the end of the second spring 174 away from the plug-in 173 is fixedly connected to the top wall of the lifting member 175, the lifting member 175 is vertically slidably connected to the sliding member 171, and the connection Component 176 is provided with a sliding groove 1761, and a first sliding rod 1711 is fixedly connected to the bottom of the sliding component 171, and the first sliding rod 1711 is inserted into the sliding groove 1761. The connecting component 176 is slidingly connected to the sliding component 171 through the first sliding rod 1711. The lifting component 175 is fixedly connected with the second sliding rod 1751, and the second sliding rod 1751 is inserted into the sliding groove 1761. The lifting component 175 is slidingly connected to the connecting component 176 through the sliding rod, and one end of the connecting component 176 away from the lifting component 175 is hinged to the groove wall of the fixed groove 161. The sliding component 171 is provided with a locking groove 1712, and the locking component 177 is inserted into the locking groove 1712. The locking component 177 is slidingly connected to the outer wall of the lower shell 16, and the upper shell 15 is provided with an insertion opening 151, and the insertion opening 151 is opened in a ring shape.

[0046] When installing the upper shell 15 and the lower shell 16, the inner wall of the upper shell 15 is placed corresponding to the inner wall of the lower shell 16, and the sliding member 171 is pushed. The sliding member 171 drives the insertion plug 173 to move toward the insertion opening 151, and the insertion plug 173 is inserted into the insertion opening 151. When the sliding member 171 moves, the first sliding rod 1711 slides along the sliding groove 1761, thereby driving the lifting member 175 to descend, and the lifting member 175 pulls the second spring 174, and the second spring 174 pulls the insertion plug 173, so that the insertion plug 173 is pressed tightly against the insertion opening 151, and the locking member 177 is slid to insert the locking member 177 into the locking groove 1712, thereby realizing the assembly of the upper shell 15 and the lower shell 16, and improving the installation tightness of the upper shell 15 and the lower shell 16.

[0047] The implementation principle of the exhaust gas recovery system for a building material monomer product combustion test equipment in the embodiment of the present application is as follows: after the exhaust gas enters the interior of the casing 1, it passes through the preliminary condensation area 21 for condensation and separation, thereby separating the condensate from the gas that can be discharged, and the condensate after the preliminary separation enters the condensation chamber, and the gas that can be discharged enters the exhaust condensation area for re-condensation and separation, thereby improving the quality of the dischargeable gas that meets the standards, and the condensate condensed in the discharge condensation area 22 enters the second condensation mechanism 3, so that the condensate gathers in the condensation chamber, and the gas that follows the condensate and enters the second condensation mechanism 3 is subjected to secondary condensation and separation from the exhaust gas, so that the gas that meets the standards is discharged from the outlet pipe 13, and the condensate in the second condensation mechanism 3 is moved to the catalytic oxidation mechanism 4 for catalytic oxidation. The catalytically oxidized gas passes through the condensation chamber and the discharge condensation area 22. If the gas meets the emission standard, the gas is discharged from the outlet pipe 13. If it does not meet the emission standard, the condensate is formed and enters the catalytic oxidation mechanism 4 for oxidation again until the gas meets the standard, thereby improving the exhaust gas treatment effect and reducing air pollution.

[0048] The above are all preferred embodiments of the present application. The embodiments are only explanations of the present application and do not limit the protection scope of the present application in turn. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. An exhaust gas recovery system for a building material monomer product combustion test equipment, characterized in that: include: A casing (1), the casing (1) being provided with an air inlet and an air outlet, the air inlet being connected to an air inlet pipe (11), the air inlet pipe (11) being provided with a fan (12), the fan (12) being used to transport exhaust gas into the casing (1); The first condensation mechanism (2) comprises a preliminary condensation zone (21) and a discharge condensation zone (22), wherein the preliminary condensation zone (21) is used to perform preliminary condensation separation on the exhaust gas, wherein part of the exhaust gas is condensed to form condensate, and part of the exhaust gas enters the discharge condensation zone (22), and the discharge condensation zone (22) performs further condensation separation on the exhaust gas, so that the gas that meets the emission standard is discharged through the gas outlet; A second condensing mechanism (3), connected to the first condensing mechanism (2), for performing secondary condensation separation on the exhaust gas following the condensate; The catalytic oxidation mechanism (4) is located on the output end side of the second condensation mechanism (3) and is used to catalytically oxidize the condensate to form gas, which is then transported to the second condensation mechanism (3) and the discharge condensation area (22) in sequence.

2. The exhaust gas recovery system for a building material single product combustion test equipment according to claim 1, characterized in that: The first condensing mechanism (2) comprises a first layer plate (23), a second layer plate (24) and a first condensing tube (25); the first layer plate (23) is connected to the casing (1); the second layer plate (24) is connected to the casing (1); a condensation layer is formed between the first layer plate (23) and the second layer plate (24); the first condensing tube (25) runs through the first layer plate (23) and the second layer plate (24); the first condensing tube (25) is connected to the second condensing mechanism (3); the first layer plate (23) is connected to an isolation plate (26); the condensation layer is separated into the preliminary condensation area (21) and the discharge condensation area (22) by the isolation plate (26).

3. The exhaust gas recovery system for a building material single product combustion test equipment according to claim 2, characterized in that: The second condensing mechanism (3) comprises a third layer plate (31) and a second condensing tube (32); the third layer plate (31) is connected to the casing (1); a condensing chamber is formed between the third layer plate (31) and the second layer plate (24); the first condensing tube (25) is connected to the condensing chamber; and the second condensing tube (32) is installed in the condensing chamber.

4. The exhaust gas recovery system for a building material single product combustion test equipment according to claim 3, characterized in that: A filter element (33) is provided on one side of the third plate (31) close to the second plate (24); the filter element (33) is arranged in an inclined manner and is located at the bottom of the discharge condensation area (22).

5. The exhaust gas recovery system for a building material single product combustion test equipment according to claim 4, characterized in that: The filter element (33) adopts an elastic filtering structure.

6. The exhaust gas recovery system for a building material single product combustion test equipment according to claim 1, characterized in that: The catalytic oxidation mechanism (4) is provided with a heat recovery zone (5), and the heat recovery zone (5) is used to recover the heat generated by the preliminary condensation zone (21) and transfer the heat to the condensate.

7. The waste gas recovery system for a building material single product combustion test equipment according to claim 6, characterized in that: A preheating zone (6) is provided between the second condensing mechanism (3) and the heat recovery zone (5), and the preheating zone (6) is used to recover the waste heat of the discharge condensing zone (22), the second condensing mechanism (3) and the heat recovery zone (5), and to preheat the condensate for catalytic oxidation.

8. The exhaust gas recovery system for a building material single product combustion test equipment according to claim 1, characterized in that: The housing (1) is connected to an air pipe (8), and fresh air flows through the air pipe (8). The air pipe (8) is used to transport the fresh air to the catalytic oxidation mechanism (4).

9. The waste gas recovery system for a building material single product combustion test equipment according to claim 8, characterized in that: The flow direction of the fresh air is perpendicular to the flow direction of the exhaust gas.

10. The waste gas recovery system for building material single product combustion test equipment according to claim 1, characterized in that: The housing (1) comprises an upper shell (15), a lower shell (16) and a fixing assembly (17); the upper shell (15) and the lower shell (16) are assembled and connected via the fixing assembly (17).

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