Gas processing device

Abstract

The present invention relates to the technical field of tail gas treatment, and proposes a gas treatment device for treating tail gas containing triethylamine generated by triethylamine cold core box core making, comprising: a box body, the box body having an adsorption chamber and a desorption chamber; a circulating conveying member arranged in the adsorption chamber and the desorption chamber, a plurality of mounting plates, the plurality of mounting plates are arranged on the circulating conveying member at intervals, and the mounting plate has a plurality of mounting grooves; a plurality of activated carbon boxes, each of which can be detachably arranged on a mounting groove, after the circulating conveying member rotates, the activated carbon box located in the adsorption chamber is used to adsorb triethylamine, and the activated carbon box located in the desorption chamber is used to desorb triethylamine. Through the above technical scheme, the problem that the adsorption equipment in the prior art needs to be stopped for replacement after the activated carbon is saturated, and the triethylamine is easily caused to escape during the replacement process, which increases the risk of environmental pollution and the health of operators is solved.

Description

Technical Field

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

[0002] Triethylamine cold core box core making is a core making technology introduced to the foundry industry by Ashland Oil Chemical Company in the United States in 1968. With its many advantages such as high production efficiency, high sand core size accuracy, good disintegration, and low overall cost, it was welcomed by the foundry industry at home and abroad soon after its introduction and has been widely used. Today, it has become the most commonly used core making process in the foundry industry.

[0003] However, the triethylamine tail gas produced in the triethylamine cold box core making process is toxic, not only pollutes the atmospheric environment, but also is harmful to human health. In order to protect the environment and protect the health of personnel, it is necessary to study triethylamine gas recovery. At present, the method for treating organic waste gas has liquid absorption method, adsorption method, combustion method, membrane separation method, condensation method, biological method and plasma method etc., but when treating the triethylamine tail gas produced in casting production, the activated carbon of the adsorption equipment needs to be shut down and replaced with new activated carbon after absorbing saturated triethylamine, and the activated carbon after adsorption is desorbed, which is not only time-consuming and laborious, but also when taking and placing and replacing the activated carbon that has been adsorbed saturated, the triethylamine in the equipment can escape, pollute the environment and cause damage to the human body. Summary of the invention

[0004] The present invention provides a gas treatment device, which solves the problem that the adsorption equipment in the related art needs to be shut down for replacement after the activated carbon is saturated, and triethylamine is easily released during the replacement process, which increases the risk of environmental pollution and the health of operators.

[0005] The technical solution of the present invention is as follows:

[0006] A gas treatment device for treating tail gas containing triethylamine generated by triethylamine cold box core making, comprising:

[0007] A box body having an adsorption chamber and a desorption chamber;

[0008] A circulating conveying member, arranged in the adsorption chamber and the desorption chamber;

[0009] There are a plurality of mounting plates, each of which is spaced apart on the circulating conveyor, and each of which has a plurality of mounting grooves;

[0010] There are several activated carbon boxes, each of which can be detachably mounted on one of the mounting grooves. After the circulating conveyor rotates, the activated carbon box located in the adsorption chamber is used to adsorb triethylamine, and the activated carbon box located in the desorption chamber is used to desorb triethylamine.

[0011] Preferably, the circulating conveyor comprises:

[0012] A driving sprocket is rotatably disposed in the adsorption chamber;

[0013] A driven sprocket is rotatably disposed in the desorption chamber;

[0014] A chain is wound around the driving sprocket and the driven sprocket, and a plurality of mounting plates are spaced apart on the chain.

[0015] Preferably, the mounting plate has a ventilation groove, and a plurality of air holes are opened on the circumference of the outer wall of the activated carbon box, and the ventilation groove and the air holes are connected.

[0016] Preferably, it also includes:

[0017] A plurality of partitions are provided, wherein the plurality of partitions are arranged inside the box body, and the partitions separate the box body into the adsorption chamber and the desorption chamber;

[0018] There are several cleaning pieces, each of which is arranged between adjacent partitions. After the chain moves, the cleaning piece is used to clean the outer surface of the activated carbon box.

[0019] Preferably, the cleaning member comprises:

[0020] A card seat, arranged between two adjacent partitions;

[0021] A support wheel is rotatably disposed on the clamping seat, and an end surface of the activated carbon box abuts against the support wheel;

[0022] A cleaning roller is rotatably arranged on the clamping seat, and the rotation direction of the cleaning roller is opposite to the rotation direction of the chain.

[0023] Preferably, it also includes:

[0024] An air intake pipe is arranged on the box body;

[0025] A first heat exchange box is disposed in the desorption chamber and located inside the chain, the air intake pipe is connected to the first heat exchange box, the first heat exchange box is in contact with the mounting plate, and the first heat exchange box is used to absorb the heat of the desorption chamber;

[0026] A hot air box is arranged on the box body, and nitrogen is stored in the hot air box;

[0027] A second heat exchange box is arranged on the inner wall of the desorption chamber, the outer wall of the second heat exchange box is in contact with the outer wall of the activated carbon box, and the second heat exchange box is used to provide heat to the activated carbon box;

[0028] A circulation pipeline, one end of which is arranged on one side of the second heat exchange box, and the other end of which is arranged on the other side of the second heat exchange box, the hot air box is connected to the circulation pipeline, and the circulation pipeline is used to transport the nitrogen to the second heat exchange box through the hot air box;

[0029] An exhaust pipe is arranged at the bottom of the box body, and the exhaust pipe is communicated with the first heat exchange box.

[0030] Preferably, the adsorption chamber has an air inlet, and the air inlet is located at one side of the adsorption chamber, and further comprises:

[0031] An air delivery pipe, one end of which is connected to the exhaust pipe, and the other end of which is connected to the air inlet, and the air delivery pipe is used to deliver the exhaust gas to the adsorption chamber.

[0032] Preferably, the gas delivery pipe has a pre-treatment section, which is arranged obliquely upward along the air flow direction, and further comprises:

[0033] There are a plurality of filter plates, and the plurality of filter plates are arranged at intervals in the pretreatment section. The filter plates are used to pretreatment solid particles in the tail gas.

[0034] Preferably, it also includes:

[0035] A condenser has an inlet end, the inlet end is communicated with the desorption chamber, and the condenser is used to liquefy the triethylamine.

[0036] Preferably, the adsorption chamber further has an air outlet, and the air outlet is located at the other side of the adsorption chamber, and further comprises:

[0037] There are a plurality of guide plates, which are respectively arranged at intervals at the air inlet and the air outlet, and the guide plates are used to evenly divert the exhaust gas.

[0038] The working principle and beneficial effects of the present invention are:

[0039] In the present invention, the tail gas containing triethylamine enters the adsorption chamber, the activated carbon box therein adsorbs the triethylamine gas in the gas, the circulating conveyor rotates, the activated carbon box that has adsorbed triethylamine is sent to the desorption chamber, and the triethylamine is released from the activated carbon by hot gas heating to complete the desorption process. Through the continuous rotation of the circulating conveyor, the continuous adsorption and desorption of the activated carbon box are achieved, avoiding the inconvenience of stopping the machine to replace the activated carbon in the traditional method, and reducing the risk of triethylamine escaping. The gas treatment device of the present invention significantly improves the treatment efficiency, reduces the maintenance cost, and effectively controls the emission of harmful substances. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The preferred implementation modes will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present invention.

[0041] Figure 1 It is a schematic diagram of the box structure of the present invention;

[0042] Figure 2 This is a schematic diagram of the structure of the circulating conveyor of the present invention;

[0043] Figure 3 It is a schematic diagram of the structure of the circulating conveyor and the activated carbon box of the present invention;

[0044] Figure 4 This is a schematic diagram of the external structure of the box body of the present invention;

[0045] Figure 5 It is a schematic diagram of the hot air box structure of the present invention;

[0046] Figure 6 This is a schematic diagram of the internal structure of the box body of the present invention from a top view;

[0047] Figure 7 It is a schematic diagram of the structure of the cleaning member of the present invention;

[0048] Figure 8 This is a schematic diagram of the structure of the pretreatment section of the present invention.

[0049] In the figure: 1. box body; 101. adsorption chamber; 102. desorption chamber; 103. air inlet; 104. air outlet; 2. partition; 3. circulating conveying member; 301. chain; 302. driving sprocket; 303. driven sprocket; 304. mounting plate; 3041. ventilation groove; 3042. mounting groove; 4. activated carbon box; 401. air hole; 5. air pipe; 501. pretreatment section; 6. filter plate; 7. second heat exchange box; 8. first heat exchange box; 9. guide plate; 10. cleaning member; 1001. snap-fit ​​seat; 1002. support wheel; 1003. cleaning roller; 11. air inlet pipe; 12. exhaust pipe; 13. condenser; 1301. entry end; 14. hot air box; 15. circulation pipe. DETAILED DESCRIPTION

[0050] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0051] In order to simplify the drawings, only the parts related to the invention are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically shown, or only one of them is marked. In this article, "one" not only means "only one", but also means "more than one", and "several" includes "two" and "more than two".

[0052] In this document, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0053] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0054] First of all, it should be noted that the boiling point of triethylamine (TEA) is about 89.5°C at standard atmospheric pressure (1 atmosphere, i.e. 101.325 kPa). At a temperature of 60°C, triethylamine is not completely above its boiling point, so it will not be completely present in the tail gas as a gas, but due to volatility, a portion of triethylamine will be present in the gas as a vapor. However, even at temperatures below the boiling point, volatile liquids such as triethylamine will evaporate and produce vapor pressure. At 60°C, although triethylamine has not yet reached its boiling point, its vapor pressure is high enough to produce a significant gaseous component. Specifically, the vapor pressure of triethylamine at 20°C is about 8.80 kPa, and as the temperature increases, the vapor pressure increases, so at 60°C, its vapor pressure will be higher, enough to ensure that a considerable proportion of triethylamine will be present in the tail gas in gaseous form. Therefore, in the tail gas at 60°C, triethylamine is mainly present in gaseous form, although there may also be a small amount of unevaporated droplets. In a typical triethylamine cold core box core making process, the curing temperature is usually between room temperature and 60°C. However, due to the exothermic reaction in the core making process and the heat capacity of the mold, the temperature of the tail gas just released from the core box will be slightly higher than the curing temperature, sometimes up to 60°C to 80°C, or even higher. Once the tail gas leaves the core box, its temperature will quickly approach the ambient temperature. In the tail gas treatment system, such as before the activated carbon adsorption device, the temperature of the tail gas usually needs to be controlled within an appropriate range to ensure adsorption efficiency. If the tail gas temperature is too high, it may need to pass through a pretreatment stage, usually close to room temperature or slightly higher, to improve the adsorption performance of the adsorbent (such as activated carbon).

[0055] Reference Figure 1 to Figure 8 , which is an embodiment of the present invention, proposes a gas treatment device for treating tail gas containing triethylamine generated by triethylamine cold box core making, comprising: a box body 1, having an adsorption chamber 101 and a desorption chamber 102; a circulating conveying member 3, arranged in the adsorption chamber 101 and the desorption chamber 102; a mounting plate 304, having a plurality of mounting plates 304, each of which is spaced apart and arranged on the circulating conveying member 3, and the mounting plate 304 has a plurality of mounting grooves 3042; a plurality of activated carbon boxes 4, each of which can be detachably arranged on a mounting groove 3042, after the circulating conveying member 3 rotates, the activated carbon box 4 located in the adsorption chamber 101 is used for adsorbing triethylamine, and the activated carbon box 4 located in the desorption chamber 102 is used for desorbing triethylamine.

[0056] In the above scheme, the housing 1 includes two main parts: an adsorption chamber 101 and a desorption chamber 102, which are used for adsorption and desorption of triethylamine, respectively. The circulating conveyor 3 is located inside the adsorption chamber 101 and the desorption chamber 102, and is provided with a plurality of mounting grooves 3042 for carrying the activated carbon box 4. The circulating conveyor 3 can rotate to switch the activated carbon box 4 between the adsorption and desorption states. The activated carbon box 4 can be detachably mounted on the mounting groove 3042 of the circulating conveyor 3, and adsorbs triethylamine when in the adsorption chamber 101, and performs desorption when moved to the desorption chamber 102; the mounting plate 304 can provide an installation position for the activated carbon box 4.

[0057] Working principle: Adsorption stage: tail gas containing triethylamine enters the adsorption chamber 101, wherein the activated carbon box 4 adsorbs the triethylamine gas in the gas. Desorption stage: the circulating conveyor 3 rotates, and the activated carbon box 4 that has adsorbed triethylamine is sent to the desorption chamber 102, and the triethylamine is released from the activated carbon by hot gas heating to complete the desorption process. Through the continuous rotation of the circulating conveyor 3, the continuous adsorption and desorption of the activated carbon box 4 are achieved, avoiding the inconvenience of stopping the machine to replace the activated carbon in the traditional method, and reducing the risk of triethylamine escaping. The gas treatment device of the present invention significantly improves the processing efficiency, reduces the maintenance cost, and effectively controls the emission of harmful substances.

[0058] Furthermore, the circulating conveyor 3 includes: a driving sprocket 302 rotatably disposed in the adsorption chamber 101; a driven sprocket 303 rotatably disposed in the desorption chamber 102; a chain 301 wound around the driving sprocket 302 and the driven sprocket 303, and a plurality of mounting plates 304 are spaced apart on the chain 301.

[0059] In the above scheme, the driving sprocket 302 is located in the adsorption chamber 101, and is driven by an external motor or other power source to drive the entire circulating conveyor 3 to operate. The driven sprocket 303 is located in the desorption chamber 102, and cooperates with the driving sprocket 302 to jointly support and guide the movement of the chain 301. The chain 301 surrounds the driving sprocket 302 and the driven sprocket 303, and serves as the main transmission medium to ensure the continuous operation of the circulating conveyor 3. There are multiple mounting plates 304, which are evenly spaced and arranged on the chain 301, and each mounting plate 304 is provided with a mounting groove 3042 for fixing the activated carbon box 4.

[0060] Workflow: When the driving sprocket 302 rotates under the drive of the motor, the chain 301 moves accordingly, driving all the mounting plates 304 installed on the chain 301 and the activated carbon box 4 thereon to move along the preset path. After the activated carbon box 4 adsorbs triethylamine in the adsorption chamber 101, it is automatically transferred to the desorption chamber 102 with the movement of the chain 301. At this time, the triethylamine in the activated carbon box 4 begins the desorption process, and the desorbed triethylamine is output and then subjected to subsequent treatment. After the desorption is completed, the activated carbon box 4 returns to the adsorption chamber 101 with the chain 301 again to prepare for the next round of adsorption work, thus forming a continuous cycle process. Through the cooperation of the chain 301 and the sprocket, the continuous movement of the activated carbon box 4 is guaranteed, without manual intervention, and the work efficiency is greatly improved. The entire cycle is driven by a motor, which reduces the labor cost and reduces the risk of the operator contacting triethylamine. The design of the efficient circulation conveyor 3 allows the adsorption and desorption processes to be carried out simultaneously, improves the overall processing capacity, and reduces the equipment downtime.

[0061] Furthermore, the mounting plate 304 has a ventilation groove 3041 , and a plurality of air holes 401 are opened on the circumference of the outer wall of the activated carbon box 4 , and the ventilation groove 3041 and the air holes 401 are connected.

[0062] In the above scheme, the ventilation groove 3041 allows the gas to pass through the activated carbon box 4 more smoothly, increasing the contact area and time between the gas and the activated carbon, thereby improving the adsorption efficiency. A plurality of pores 401 are evenly distributed on the circumference of the outer wall of the activated carbon box 4. These pores 401 are connected to the ventilation grooves 3041 on the mounting plate 304 to form a complete gas flow path. The presence of the pores 401 not only enhances the permeability of the gas, but also ensures the uniform distribution of the gas inside the activated carbon box 4, avoids the dead zone of the gas flow, and improves the utilization rate of the adsorbent. When the tail gas containing triethylamine enters the activated carbon box 4 through the ventilation groove 3041, the gas can quickly diffuse to all areas inside the activated carbon box 4, fully contact with the activated carbon through the pores 401, and maximize the use of the adsorption capacity of the activated carbon. Since the gas is more evenly distributed inside the activated carbon box 4, it ensures that each activated carbon particle has the opportunity to contact the gas to be treated, thereby significantly improving the adsorption efficiency and the use efficiency of the adsorbent.

[0063] Furthermore, it also includes: a plurality of partitions 2, which are arranged inside the box body 1, and the partitions 2 divide the box body 1 into an adsorption chamber 101 and a desorption chamber 102; a plurality of cleaning parts 10, each cleaning part 10 is arranged between adjacent partitions 2, and after the chain 301 moves, the cleaning parts 10 are used to clean the outer surface of the activated carbon box 4.

[0064] In the above scheme, several partitions 2 are arranged inside the box body 1. The main function of the partitions 2 is to separate the space of the box body 1 into an adsorption chamber 101 and a desorption chamber 102, so as to ensure that the adsorption and desorption stages in the gas treatment process do not interfere with each other. This physical isolation helps to maintain different operating conditions in the two chambers, such as temperature, to optimize the effects of adsorption and desorption. The number of cleaning pieces 10 matches the partitions 2, and each cleaning piece 10 is placed between adjacent partitions 2. When the chain 301 of the circulating conveyor 3 moves, the cleaning piece 10 will contact the outer surface of the activated carbon box 4, play a role in cleaning impurities or dust adsorbed on the surface of the activated carbon box 4, keep the activated carbon box 4 clean, prevent clogging, and ensure that the efficiency of gas treatment is not affected. The cleaning piece 10 also helps to reduce the frequency of maintenance, because the cleaning piece 10 can automatically remove surface dirt every time the activated carbon box 4 passes, extend the effective service life of the activated carbon box 4, and also reduce the need for manual cleaning. The addition of the partition 2 and the cleaning piece 10 not only optimizes the internal structure of the gas treatment device, but also improves the reliability and efficiency of its operation. The partition 2 ensures the independence and controllability of the adsorption and desorption processes, while the cleaning piece 10 ensures the cleanliness of the activated carbon box 4. The two work together to significantly enhance the performance of the entire system. By regularly and automatically cleaning the activated carbon box 4, the maintenance workload is reduced, while also ensuring the long-term stable operation of the treatment device. The partition 2 also serves to seal and separate and insulate the two cavities.

[0065] Furthermore, the cleaning member 10 includes: a clamping seat 1001, which is arranged between two adjacent partitions 2; a supporting wheel 1002, which is rotatably arranged on the clamping seat 1001, and the end face of the activated carbon box 4 abuts against the supporting wheel 1002; a cleaning roller 1003, which is rotatably arranged on the clamping seat 1001, and the rotation direction of the cleaning roller 1003 is opposite to the rotation direction of the chain 301.

[0066] In the above scheme, the clamping seat 1001 is set between two adjacent partitions 2. The function of the clamping seat 1001 is to fix and support other components of the cleaning member 10 to ensure the stable positioning of the cleaning member 10 in the box body 1. The support wheel 1002 is rotatably set on the clamping seat 1001. The support wheel 1002 provides support for the activated carbon box 4 when it passes by, ensuring the stability and guidance of the activated carbon box 4 during the movement, and also helps to maintain the correct position of the activated carbon box 4 so that it is in full contact with the cleaning roller 1003. The cleaning roller 1003 is also rotatably set on the clamping seat 1001, but its rotation direction is opposite to that of the chain 301. By utilizing the principle of relative motion, when the activated carbon box 4 moves with the chain 301, the reverse rotation of the cleaning roller 1003 can generate a stronger cleaning force, effectively removing dust and impurities that may accumulate on the outer surface of the activated carbon box 4. The cleaning roller 1003 is in close contact with the end surface of the activated carbon box 4. The friction generated by its reverse rotation can effectively remove the dirt on the surface of the adsorption material, ensure the cleanliness of the activated carbon box 4, and thus maintain its good adsorption performance. By keeping the activated carbon box 4 clean, the continuous and efficient operation of the gas treatment device is ensured, and the decrease in treatment efficiency caused by clogging of the adsorption material surface is avoided. System reliability: The automatic cleaning function of the cleaning part 10 helps to improve the stability and reliability of the entire system and reduce the downtime caused by equipment failure.

[0067] Furthermore, it also includes: an air intake pipe 11, which is arranged on the box body 1; a first heat exchange box 8, which is arranged in the desorption chamber 102 and is located on the inner side of the chain 301, the air intake pipe 11 is connected to the first heat exchange box 8, the first heat exchange box 8 is in contact with the mounting plate 304, and the first heat exchange box 8 is used to absorb the heat of the desorption chamber 102; a hot air box 14, which is arranged on the box body 1, and nitrogen is stored in the hot air box 14; a second heat exchange box 7, which is arranged on the inner wall of the desorption chamber 102, the outer wall of the second heat exchange box 7 is in contact with the outer wall of the activated carbon box 4, and the second heat exchange box 7 is used to provide heat to the activated carbon box 4; a circulation pipe 15, one end of which is arranged on one side of the second heat exchange box 7, and the other end is arranged on the other side of the second heat exchange box 7, the hot air box 14 is connected to the circulation pipe 15, and the circulation pipe 15 is used to transport nitrogen to the second heat exchange box 7 through the hot air box 14; an exhaust pipe 12, which is arranged at the bottom of the box body 1, and the exhaust pipe 12 is connected to the first heat exchange box 8.

[0068] In the above scheme, the air inlet pipe 11 is arranged on the box body 1, and its main function is to absorb the hot air flow during the desorption process, ensure that the triethylamine in the tail gas circulates in a gaseous state, and prevent the triethylamine from liquefying during the tail gas treatment process. The source of the hot air flow is the heat generated by the hot air box 14 heating the nitrogen inside it. Secondly, the hot nitrogen can also blow the activated carbon box 4 to prevent the triethylamine from being absorbed by the activated carbon again after desorption. Specifically, a jet nozzle is opened on the side of the second heat exchange box 7 facing the mounting plate 304, and the hot nitrogen is sprayed to the activated carbon box through the jet nozzle to thermally desorb the activated carbon. The desorbed triethylamine and nitrogen are condensed together, and the triethylamine is liquefied and recovered. The nitrogen is refluxed to the hot air box for heating for the next cycle. It should be noted that the tail gas is transported to the first heat exchange box 8 through the air inlet pipe 11 before desorption, and the triethylamine in the tail gas is ensured to remain in a gaseous state through the heat exchange of the heat exchange box. The first heat exchange box 8 is located in the desorption chamber 102 and is adjacent to the inner side of the chain 301, and is directly connected to the intake pipe 11. The purpose of the first heat exchange box 8 is to transfer the heat of the desorption chamber directly to the exhaust gas. The first heat exchange box 8 is in contact with the mounting plate 304. The second heat exchange box 7 is arranged on the inner wall of the desorption chamber 102, and is also connected to the hot air box 14. Unlike the first heat exchange box 8, the outer wall of the second heat exchange box 7 is in direct contact with the outer wall of the activated carbon box 4, and the heat energy can be directly transferred from the second heat exchange box 7 to the outer surface of the activated carbon box 4, further enhancing the heat supply during the desorption process and improving the desorption efficiency. The heated nitrogen will be temporarily stored in the second heat exchange box 7 and then sprayed into the desorption chamber. The exhaust pipe 12 is arranged at the bottom of the box body 1 and is connected to the first heat exchange box 8. The efficient heat exchange ensures that the activated carbon box 4 can quickly and completely release the adsorbed triethylamine during the desorption stage, reducing the residue and improving the regeneration efficiency of the activated carbon.

[0069] Furthermore, the adsorption chamber 101 has an air inlet 103 , which is located at one side of the adsorption chamber 101 , and also includes: an air pipe 5 , one end of which is connected to the exhaust pipe 12 , and the other end of which is connected to the air inlet 103 , and the air pipe 5 is used to transport the exhaust gas into the adsorption chamber 101 .

[0070] In the above scheme, one end of the gas pipe 5 is connected to the exhaust pipe 12, and the other end is connected to the air inlet 103 of the adsorption chamber 101. It is ensured that the tail gas discharged from the desorption chamber 102 can directly enter the adsorption work. By introducing the tail gas in the exhaust pipe 12 into the adsorption chamber 101 through the gas pipe 5, the heat of the tail gas can be utilized, and the waste of resources can be reduced. At the same time, the flow control of the gas pipe 5 can be adjusted to optimize the balance of the adsorption and desorption processes.

[0071] Furthermore, the gas pipeline 5 has a pretreatment section 501, which is arranged obliquely upward along the airflow direction, and also includes: a filter plate 6, which has a plurality of filter plates 6, and the plurality of filter plates 6 are arranged at intervals in the pretreatment section 501, and the filter plates 6 are used to pretreat solid particles in the exhaust gas.

[0072] In the above scheme, a pretreatment section 501 is added to the gas pipeline 5 to achieve preliminary purification of the exhaust gas. The pretreatment section 501 is arranged obliquely upward along the direction of the airflow, which is conducive to the natural sedimentation of solid particles under the action of gravity, and reduces the possibility of particulate matter entering the adsorption chamber 101 with the airflow, thereby protecting the activated carbon box 4 in the adsorption chamber 101 from blockage and pollution. Several filter plates 6 are arranged at intervals in the pretreatment section 501. The layout of these filter plates 6 can increase the contact area between the gas and the filter plate 6 and improve the filtration efficiency. The gap size and material selection of the filter plate 6 should consider both effectively intercepting solid particles and not excessively hindering the passage of airflow, so as to ensure the normal operation of the gas treatment device. The main function of the filter plate 6 is to intercept and capture solid particles in the exhaust gas, prevent these particles from entering the adsorption chamber 101, and affect the efficiency of the adsorption process and the service life of the activated carbon box 4.

[0073] Secondly, the upwardly inclined pretreatment section 501 will also slow down the exhaust gas circulation speed, improve the filtering effect and speed up the exhaust gas cooling progress. It should be noted that the desorption chamber can heat or control the exhaust gas temperature above 80°C, and the pretreatment section can control the exhaust gas at about 40-50°C before entering the adsorption chamber, which is convenient for adsorption and desorption.

[0074] Furthermore, it also includes: a condenser 13 having an inlet end 1301, the inlet end 1301 is connected to the desorption chamber 102, and the condenser 13 is used to liquefy triethylamine.

[0075] In the above scheme, the condenser 13 has an inlet end 1301, wherein the inlet end 1301 is connected to the desorption chamber 102, and receives the hot air flow containing triethylamine vapor discharged from the desorption chamber 102. The discharge end is used to export the liquid triethylamine after condensation so as to carry out the next step of processing or recovery. The condenser 13 converts the triethylamine vapor into a liquid state by cooling. In the desorption chamber 102, the activated carbon box 4 is prompted to release the adsorbed triethylamine vapor by heating. These vapors are then introduced into the condenser 13, and under the cooling environment inside the condenser 13, the vapor is rapidly cooled, thereby liquefied into a liquid, and by liquefying the triethylamine vapor, the effective recovery of triethylamine can be achieved, which not only reduces the emission of harmful substances.

[0076] Furthermore, the adsorption chamber 101 also has an outlet 104, which is located on the other side of the adsorption chamber 101, and also includes: a guide plate 9, which has a plurality of guide plates 9, which are respectively arranged at intervals at the air inlet 103 and the air outlet 104, and the guide plates 9 are used to evenly divert the exhaust gas.

[0077] In the above solution, the guide plate 9 ensures that the tail gas entering the adsorption chamber 101 can be evenly distributed, thereby improving the contact efficiency between the gas and the activated carbon box 4 .

[0078] It should be noted that after the exhaust gas enters the adsorption chamber 101 through the air inlet 103, the exhaust gas first impacts the activated carbon box 4 facing it. At this time, the saturation speed of the activated carbon in the activated carbon box 4 closest to the air inlet 103 is the fastest. Therefore, through the chain 301-type conveying device, when the activated carbon in the activated carbon box 4 facing the air inlet 103 tends to be saturated, the chain 301 can be used to drive this part of the activated carbon box 4 to rotate to a position close to the air outlet 104. At this time, the new activated carbon box 4 rotates to a position close to the air inlet 103 to have a large amount of adsorbed activated carbon, and the activated carbon box 4 rotated to a position close to the air outlet 104 is adsorbed through the activated carbon close to the mounting plate 304. Not only can the activated carbon at different positions of the activated carbon box 4 be saturated with adsorption, but also multiple adsorptions can be formed in the adsorption chamber 101, thereby improving the adsorption efficiency of triethylamine. Secondly, when the activated carbon box 4 near the air outlet 104 is completely saturated with adsorption, the chain 301 drives this part of the activated carbon box 4 into the desorption layer. Through the cooperation of the first heat exchange box 8 and the second heat exchange box 7, the activated carbon in the activated carbon box 4 can be desorbed, and the triethylamine can be kept in a gaseous state, thereby improving the desorption effect and efficiency.

[0079] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A gas treatment device for treating tail gas containing triethylamine produced by triethylamine cold box core making, characterized in that: include: The housing (1) comprises an adsorption chamber (101) and a desorption chamber (102); A circulating conveying member (3) is arranged in the adsorption chamber (101) and the desorption chamber (102); A plurality of mounting plates (304), each of which is arranged at intervals on the circulating conveyor (3), and each of which has a plurality of mounting grooves (3042); There are a plurality of activated carbon boxes (4), each of which is detachably mounted on one of the mounting grooves (3042); after the circulating conveyor (3) rotates, the activated carbon box (4) located in the adsorption chamber (101) is used to adsorb triethylamine, and the activated carbon box (4) located in the desorption chamber (102) is used to desorb triethylamine; The circulating conveying member (3) comprises: A driving sprocket (302) rotatably disposed in the adsorption chamber (101); A driven sprocket (303) rotatably disposed in the desorption chamber (102); A chain (301) is wound around the driving sprocket (302) and the driven sprocket (303), and a plurality of mounting plates (304) are arranged on the chain (301) at intervals; The mounting plate (304) has a ventilation groove (3041), and a plurality of air holes (401) are provided on the circumference of the outer wall of the activated carbon box (4), and the ventilation groove (3041) and the air holes (401) are in communication; A plurality of partitions (2) are provided, wherein the plurality of partitions (2) are arranged inside the box body (1), and the partitions (2) divide the box body (1) into the adsorption chamber (101) and the desorption chamber (102); There are a plurality of cleaning pieces (10), each of which is arranged between adjacent partitions (2), and after the chain (301) moves, the cleaning piece (10) is used to clean the outer surface of the activated carbon box (4); An air intake pipe (11) is arranged on the box body (1); a first heat exchange box (8) disposed in the desorption chamber (102) and located on the inner side of the chain (301); the air intake pipe (11) is in communication with the first heat exchange box (8); the first heat exchange box (8) is in contact with the mounting plate (304); and the first heat exchange box (8) is used to absorb heat from the desorption chamber (102); A hot air box (14) is arranged on the box body (1), and nitrogen is stored in the hot air box (14); a second heat exchange box (7) arranged on the inner wall of the desorption chamber (102), the outer wall of the second heat exchange box (7) being in contact with the outer wall of the activated carbon box (4), and the second heat exchange box (7) being used to provide heat to the activated carbon box (4); a circulation pipe (15), one end of which is arranged on one side of the second heat exchange box (7), and the other end of which is arranged on the other side of the second heat exchange box (7); the hot air box (14) is in communication with the circulation pipe (15); the circulation pipe (15) is used to transport the nitrogen to the second heat exchange box (7) via the hot air box (14); An exhaust pipe (12) is arranged at the bottom of the box body (1), and the exhaust pipe (12) is connected to the first heat exchange box (8); The adsorption chamber (101) has an air inlet (103), and the air inlet (103) is located on one side of the adsorption chamber (101); An air delivery pipe (5) has one end connected to the exhaust pipe (12) and the other end connected to the air inlet (103); the air delivery pipe (5) is used to deliver the exhaust gas to the adsorption chamber (101).

2. A gas processing device according to claim 1, characterized in that: The cleaning element (10) comprises: A card connection seat (1001) is arranged between two adjacent partitions (2); A support wheel (1002) is rotatably disposed on the clamping seat (1001), and an end surface of the activated carbon box (4) abuts against the support wheel (1002); A cleaning roller (1003) is rotatably disposed on the clamping seat (1001), and the rotation direction of the cleaning roller (1003) is opposite to the rotation direction of the chain (301).

3. A gas processing device according to claim 1, characterized in that: The gas delivery pipe (5) comprises a pre-treatment section (501), the pre-treatment section (501) being arranged obliquely upward along the air flow direction, and further comprising: A plurality of filter plates (6) are provided, wherein the plurality of filter plates (6) are arranged at intervals in the pretreatment section (501), and the filter plates (6) are used to pretreat solid particles in the exhaust gas.

4. A gas processing device according to claim 1, characterized in that: Also includes: The condenser (13) has an inlet end (1301), wherein the inlet end (1301) is connected to the desorption chamber (102), and the condenser (13) is used to liquefy the triethylamine.

5. A gas processing device according to claim 1, characterized in that: The adsorption chamber (101) further comprises an air outlet (104), wherein the air outlet (104) is located at the other side of the adsorption chamber (101), and further comprises: The guide plates (9) are provided in a plurality, and the guide plates (9) are respectively arranged at intervals at the air inlet (103) and the air outlet (104), and the guide plates (9) are used to evenly divert the exhaust gas.

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