A distributed waste gas recovery device based on cyclopropylamine production

Abstract

The present invention belongs to the technical field of waste gas recovery, and specifically relates to a distributed waste gas recovery device based on cyclopropylamine production, which includes a waste gas recovery machine, the waste gas recovery machine includes a recovery chamber, the left side of the recovery chamber is connected with a recovery pipe, the left side of the recovery pipe is connected with a plurality of distribution pipes, and the right side of the recovery chamber is connected with an exhaust pipe; an activated carbon layer is fixedly installed in the middle of the inner wall of the recovery chamber, and an injection mechanism is arranged on the left side of the activated carbon layer, the injection mechanism includes a motor, a rotating shaft, a spray gun, and a plurality of spray pipes, the rotating shaft is fixedly connected to the output end of the motor, the spray gun is fixedly installed on the outside of the rotating shaft, and the plurality of spray pipes are all connected to the right side of the spray gun and face the activated carbon layer, and the spray gun is connected to an external water pump pipeline. The device solves the problem of purifying ammonia in the waste gas produced during the current cyclopropylamine production and always maintaining the purification effect of activated carbon.

Description

Technical Field

[0001] The invention belongs to the technical field of waste gas recovery, and in particular relates to a distributed waste gas recovery device based on cyclopropylamine production. Background Art

[0002] Cyclopropylamine (CPA) is a three-membered aliphatic amine, an important pharmaceutical intermediate, widely used in the fields of medicine, pesticides, etc. It can be used to synthesize antibacterial drugs such as ciprofloxacin, enrofloxacin, sparfloxacin, etc., and can also be used to prepare chemical herbicides such as cyprofloxacin and cyprozin. One of the current methods for producing cyclopropylamine in factories is: using methyl chlorobutyrate as a raw material, reacting it with sodium methoxide to generate methyl cyclopropanecarboxylate, and then ammoniation of methyl cyclopropanecarboxylate at medium temperature and medium pressure, and then Hofmann degradation of cyclopropanecarboxamide with sodium hypochlorite and liquid caustic soda to obtain cyclopropylamine;

[0003] At present, ammonia is produced in the production process of cyclopropylamine. Ammonia is irritating and harmful to the human body. Direct discharge not only pollutes the environment but also wastes resources. Therefore, it is necessary to recover the ammonia in the production process of cyclopropylamine. The commonly used ammonia treatment methods mainly include the following:

[0004] 1. Absorption method: dissolve ammonia in water or other solutions to allow it to be absorbed. This method is suitable for situations where the ammonia concentration is low;

[0005] 2. Activated carbon adsorption method: Use activated carbon and other materials to adsorb ammonia to achieve the purpose of purification. This method is widely used in industrial waste gas treatment, domestic sewage treatment and other fields;

[0006] 3. Biological treatment: using microorganisms to convert ammonia into harmless substances, such as ammonia and water. This method is suitable for treating wastewater with high ammonia content;

[0007] 4. Combustion method: burn ammonia into nitrogen and water to achieve the purpose of purification. This method is suitable for situations with high ammonia concentration;

[0008] Among them, the waste gas recovery device using activated carbon adsorption method has low cost, low energy consumption and is widely used. However, due to the poor absorption effect of activated carbon on ammonia, some catalysts, such as Fe2O3, MnO, etc., are often used to combine with activated carbon to form an activated carbon-catalyst composite system, increase the adsorption sites and reaction points on the surface of activated carbon, thereby improving the adsorption capacity. The temperature of ammonia will increase during the absorption process of the catalyst solution. The increase in temperature can easily cause ammonia to evaporate from the solution, affecting the recovery of ammonia. Summary of the invention

[0009] The object of the present invention is to provide a distributed waste gas recovery device based on cyclopropylamine production to solve the problems raised in the above background technology.

[0010] In order to solve the above technical problems, the present invention provides the following technical solutions: a distributed waste gas recovery device based on cyclopropylamine production, comprising a waste gas recovery machine, the waste gas recovery machine comprising a recovery chamber, the left side of the recovery chamber is connected to a recovery pipe, the left side of the recovery pipe is connected to a plurality of distribution pipes, and the right side of the recovery chamber is connected to an exhaust pipe; an activated carbon layer is fixedly installed in the middle of the inner wall of the recovery chamber, and an injection mechanism is arranged on the left side of the activated carbon layer, the injection mechanism comprises a motor, a rotating shaft, a spray gun, and a plurality of spray pipes, the rotating shaft is fixedly connected to the output end of the motor, the spray gun is fixedly installed on the outside of the rotating shaft, and the plurality of spray pipes are all connected to the right side of the spray gun and face the activated carbon layer. The spray gun is connected to an external water pump pipeline, and the external water pump is connected to a catalyst solution pipeline. A gas concentration detector is arranged inside the recovery pipe. A control panel is fixedly installed on one side of the recovery chamber. An intelligent recovery system is arranged inside the control panel. The intelligent recovery system includes a gas concentration detection module and an intelligent control module. The gas concentration detection module is arranged inside the gas concentration detector and is electrically connected to the intelligent control module. The gas concentration detection module is used to detect the exhaust gas concentration through the gas concentration detector. The intelligent control module is used to control the alternating forward and reverse rotation of the motor and the rotation frequency according to the exhaust gas concentration, and control the operating power of the external water pump.

[0011] The present invention further illustrates that an elastic telescopic rod is fixedly installed on the left side of the inner wall of the recovery chamber, the right end bearing of the elastic telescopic rod is connected to a rotating rod, the right end of the rotating rod is fixedly installed with a bevel gear disk, and a plurality of fan blades are fixedly installed on the outer side of the bevel gear disk; a bevel gear is fixedly installed on one end of the rotating shaft, and the bevel gear and the bevel gear disk are meshed with each other.

[0012] The present invention further illustrates that a connecting plate is fixedly installed below the elastic telescopic rod, the lower end of the connecting plate is fixedly connected to a connecting rod, and a fixed block is fixedly installed at the rear end of the connecting rod; extrusion balls are fixedly installed at both upper and lower ends of the fixed block, a mounting rod is fixedly installed on one side of the bevel gear, a sphere is fixedly installed at one end of the mounting rod, and the lower right side of the sphere is in contact with the upper left side of the extrusion ball; a spring is arranged inside the elastic telescopic rod.

[0013] The present invention further illustrates that a fixing plate is fixedly installed on the front end of the connecting rod, and the fixing plate is fixedly connected to the left side of the motor.

[0014] The present invention further illustrates that the exhaust gas recovery steps of the exhaust gas recovery machine include the following: step S1, the exhaust gas enters the recovery pipe through a number of distribution pipes, and then enters the recovery chamber; step S2, the intelligent recovery system is operated, the exhaust gas concentration is detected by a gas concentration detector, and then the motor is controlled to rotate alternately forward and reverse according to the exhaust gas concentration, and the frequency of its alternating forward and reverse rotation is controlled, and the operation of the external water pump is controlled at the same time, and the operating power of the external water pump is controlled, thereby controlling the pressure of the external water pump; step S3, the nozzle rotates alternately forward and reverse through the rotating shaft, and at the same time the external water pump extracts the catalyst solution and sprays it onto the activated carbon layer through the nozzle; step S4, the activated carbon layer adsorbs the ammonia in the exhaust gas, purifies the exhaust gas, and then discharges the purified gas through the exhaust pipe.

[0015] The present invention further illustrates that in step S2 and step S3: R is the frequency of the motor's alternating rotation in the forward and reverse directions. max is the maximum forward and reverse alternating rotation frequency of the motor, Q is the exhaust gas concentration, Q max The maximum exhaust gas concentration is generated in the production of cyclopropylamine. The higher the exhaust gas concentration is, the faster the frequency of the motor's alternating forward and reverse rotation will be.

[0016] The present invention further illustrates that in step S2 and step S3: F is the pressure of the external water pump, F max is the maximum pressure of the external water pump. The higher the exhaust gas concentration, the greater the pressure of the external water pump.

[0017] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: the present invention uses an external water pump to extract an external catalyst solution, inject it into a spray gun, and finally spray it onto the activated carbon layer from the spray pipe. The catalyst solution can be combined with the activated carbon to form an activated carbon and catalyst composite system, which increases the adsorption sites and reaction points on the surface of the activated carbon, thereby improving the adsorption capacity. Moreover, the intelligent recovery system controls the motor and the external water pump, making the process of spraying the catalyst solution onto the activated carbon layer more intelligent, which can further enhance the adsorption capacity of the activated carbon and reduce the loss of the catalyst solution. The spray pipe rotates alternately in the forward and reverse directions, and can spray the entire left side of the activated carbon layer. The catalyst solution is sprayed evenly, further increasing the adsorption sites and reaction points on the surface of the activated carbon.

[0018] When the catalyst solution is combined with the activated carbon layer, the temperature generated can be dissipated, thereby preventing the ammonia from volatilizing from the catalyst solution due to the increase in temperature and affecting the recovery of ammonia, and preventing the catalyst solution from being insufficiently dissolved, thereby reducing the utilization rate of the catalyst solution. The catalyst solution is sprayed and the heat is dissipated simultaneously, and the operation is automated to fully improve the exhaust gas purification effect. When the catalyst solution is combined with the activated carbon layer, the temperature generated can be dissipated, thereby preventing the ammonia from volatilizing from the catalyst solution due to the increase in temperature and affecting the recovery of ammonia, and preventing the catalyst solution from being insufficiently dissolved, thereby reducing the utilization rate of the catalyst solution. The utilization rate of the catalyst solution is fully reduced, and the injection of the catalyst solution and the heat dissipation thereof are carried out simultaneously, and the operation is automated, which fully improves the exhaust gas purification effect. At the same time, the fan blades are close to the activated carbon layer, thereby further improving the heat dissipation effect. Through the squeezing balls above and below the fixed block, the fan blades can gradually approach the activated carbon layer when the motor rotates alternately in forward and reverse directions, thereby automatically enhancing the heat dissipation. After the squeezing ball is out of contact with the sphere, the spring in the elastic telescopic rod generates a reaction force, thereby quickly resetting, causing the fan blades to produce a shaking motion. The shaking can prevent dust in the exhaust gas from adhering to the fan blades and affecting the smoothness of their rotation, thereby avoiding affecting the heat dissipation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a front view of the present invention;

[0022] Figure 3 It is a schematic plan view of the internal structure of the recovery chamber of the present invention;

[0023] Figure 4 It is a schematic diagram of the internal structure of the recovery chamber of the present invention;

[0024] Figure 5 It is a schematic diagram of the meshing relationship between the bevel gear and the bevel gear disc of the present invention;

[0025] Figure 6 It is a schematic diagram of the positional relationship between the squeeze ball and the spherical body of the present invention;

[0026] In the figure: 1. recovery chamber; 2. recovery pipe; 3. distribution pipe; 4. exhaust pipe; 5. activated carbon layer; 6. motor; 61. rotating shaft; 611. bevel gear; 612. mounting rod; 613. sphere; 62. spray gun; 63. spray pipe; 7. control panel; 8. elastic telescopic rod; 81. rotating rod; 82. bevel gear disc; 821. fan blade; 83. connecting plate; 831. connecting rod; 832. fixing block; 833. squeezing ball; 834. fixing plate. DETAILED DESCRIPTION

[0027] The following is a further non-limiting detailed description of the technical solution of the present invention in conjunction with the preferred embodiments and the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] See also Figure 1-6 The present invention provides a technical solution: a distributed waste gas recovery device based on cyclopropylamine production, comprising a waste gas recovery machine, the waste gas recovery machine comprising a recovery chamber 1, a recovery pipe 2 is connected to the left side of the recovery chamber 1, a plurality of distribution pipes 3 are connected to the left side of the recovery pipe 2, and an exhaust pipe 4 is connected to the right side of the recovery chamber 1;

[0029] An activated carbon layer 5 is fixedly installed in the middle of the inner wall of the recovery chamber 1, and an injection mechanism is arranged on the left side of the activated carbon layer 5. The injection mechanism includes a motor 6, a rotating shaft 61, a spray gun 62, and a plurality of spray pipes 63. The rotating shaft 61 is fixedly connected to the output end of the motor 6, and the spray gun 62 is fixedly installed on the outside of the rotating shaft 61. The plurality of spray pipes 63 are all connected to the right side of the spray gun 62 and face the activated carbon layer 5. The spray gun 62 is connected to an external water pump pipeline, and the external water pump is connected to a catalyst solution pipeline. A gas concentration detector is arranged inside the recovery pipe 2. A control panel 7 is fixedly installed on one side of the recovery chamber 1. An intelligent recovery system is arranged inside the control panel 7. The intelligent recovery system includes a gas concentration detection module and an intelligent control module.

[0030] The gas concentration detection module is arranged inside the gas concentration detector and is electrically connected to the intelligent control module. The gas concentration detection module is used to detect the exhaust gas concentration through the gas concentration detector. The intelligent control module is used to control the alternating forward and reverse rotation of the motor 6 and the rotation frequency according to the exhaust gas concentration, and control the operating power of the external water pump;

[0031] During the production of cyclopropylamine, a large amount of waste gas is generated. The waste gas enters the recovery pipe 2 through a number of distribution pipes 3 and finally enters the recovery chamber 1. Through the distribution pipes 3, a number of production equipment can be connected, so that the waste gas produced by a number of production equipment can be recovered and processed by a waste gas recovery device. After the waste gas enters the recovery chamber 1, the ammonia inside is adsorbed by the activated carbon layer 5, thereby purifying the waste gas. The purified waste gas is then discharged through the exhaust pipe 4, and the waste gas purification efficiency is high;

[0032] During the exhaust gas purification process, the motor 6 runs, driving the rotating shaft 61 to rotate, the rotating shaft 61 drives the spray gun 62 to rotate, the spray gun 62 drives the nozzle 63 to rotate through the rotating shaft 61, and at the same time the external water pump runs to extract the external catalyst solution and inject it into the spray gun 62, and finally sprays it from the nozzle 63 onto the activated carbon layer 5. The catalyst solution can combine with the activated carbon to form an activated carbon and catalyst composite system, increase the adsorption sites and reaction points on the surface of the activated carbon, thereby improving the adsorption capacity, and through the intelligent recovery system to control the motor 6 and the external water pump, the process of spraying the catalyst solution onto the activated carbon layer 5 is more intelligent, which can further enhance the adsorption capacity of the activated carbon and reduce the loss of the catalyst solution;

[0033] The nozzle 63 rotates alternately clockwise and counterclockwise to spray the entire left side of the activated carbon layer 5. The catalyst solution is sprayed evenly, further increasing the adsorption sites and reaction points on the surface of the activated carbon.

[0034] An elastic telescopic rod 8 is fixedly installed on the left side of the inner wall of the recovery chamber 1, and a rotating rod 81 is connected to the right end bearing of the elastic telescopic rod 8. A bevel gear disk 82 is fixedly installed on the right end of the rotating rod 81, and a plurality of fan blades 821 are fixedly installed on the outer side of the bevel gear disk 82;

[0035] A bevel gear 611 is fixedly mounted on one end of the rotating shaft 61, and the bevel gear 611 is meshed with the bevel gear disc 82;

[0036] Through the above steps, the rotation of the rotating shaft 61 drives the bevel gear 611 to rotate, and the bevel gear 611 drives the bevel gear plate 82 to rotate around the bearing through the rotating rod 81 through meshing, and the bevel gear plate 82 drives the fan blade 821 to rotate. During the rotation of the fan blade 821, the temperature generated when the catalyst solution combines with the activated carbon layer 5 can be dissipated, thereby avoiding the temperature increase causing ammonia to volatilize from the catalyst solution and affect the recovery of ammonia, and at the same time preventing the catalyst solution from being fully utilized, resulting in insufficient dissolution of ammonia and reducing the utilization rate of the catalyst solution. The catalyst solution is sprayed and the heat is dissipated simultaneously, and the operation is automatic, which fully improves the exhaust gas purification effect.

[0037] A connecting plate 83 is fixedly installed below the elastic telescopic rod 8, a connecting rod 831 is fixedly connected to the lower end of the connecting plate 83, and a fixing block 832 is fixedly installed at the rear end of the connecting rod 831;

[0038] The upper and lower ends of the fixing block 832 are fixedly mounted with extrusion balls 833, one side of the bevel gear 611 is fixedly mounted with a mounting rod 612, one end of the mounting rod 612 is fixedly mounted with a ball 613, and the lower right side of the ball 613 fits with the upper left side of the extrusion ball 833;

[0039] A spring is arranged inside the elastic telescopic rod 8;

[0040] When the bevel gear 611 rotates, the ball 613 is driven to rotate around its center through the mounting rod 612, and the ball 613 and the squeezing ball 833 are squeezed against each other. The squeezing ball 833 is forced to drive the connecting rod 831 to move through the fixing block 832, and the connecting rod 831 drives the elastic telescopic rod 8 to extend through the connecting plate 83, and the internal spring thereof is deformed under force, and the elastic telescopic rod 8 extends, so that the fan blade 821 is close to the activated carbon layer 5, thereby further improving the heat dissipation effect, and through the squeezing balls 833 above and below the fixing block 832, when the motor 6 rotates alternately in the forward and reverse directions, the fan blade 821 can be gradually close to the activated carbon layer 5, thereby automatically enhancing the heat dissipation;

[0041] After the squeezing ball 833 loses contact with the spherical body 613, the spring in the elastic telescopic rod 8 generates a reaction force, thereby quickly resetting and causing the fan blades 821 to produce a shaking motion. The shaking can prevent dust in the exhaust gas from adhering to the fan blades 821 and affecting the smoothness of its rotation, thereby avoiding affecting the heat dissipation effect.

[0042] A fixing plate 834 is fixedly mounted on the front end of the connecting rod 831, and the fixing plate 834 is fixedly connected to the left side of the motor 6;

[0043] Through the above steps, when the connecting rod 831 moves, the motor 6 is driven to move through the fixed plate 834, and the movement of the motor 6 causes the nozzle 63 to move, so that the nozzle 63 can be closer to the activated carbon layer 5, so that the catalyst solution can be fully sprayed onto the activated carbon layer 5, and the upper and lower parts of the activated carbon layer 5 are not fully sprayed with the catalyst solution, thereby further improving the adsorption capacity of the activated carbon layer 5. At the same time, the shaking of the motor 6 can also shake off the exhaust gas dust attached to the structure, thereby avoiding clogging of the nozzle 63.

[0044] The exhaust gas recovery steps of the exhaust gas recovery machine include the following:

[0045] Step S1, the exhaust gas enters the recovery pipe 2 through a plurality of distribution pipes 3, and then enters the recovery chamber 1;

[0046] Step S2, the intelligent recovery system is running, the exhaust gas concentration is detected by the gas concentration detector, and then the motor 6 is controlled to rotate alternately in the forward and reverse directions according to the exhaust gas concentration, and the frequency of the alternating rotation of the motor 6 is controlled, and the operation of the external water pump is controlled, and the operating power of the external water pump is controlled, so as to control the pressure of the external water pump;

[0047] Step S3, the nozzle 63 rotates alternately clockwise and counterclockwise through the rotating shaft 61, and at the same time, the external water pump draws the catalyst solution and sprays it onto the activated carbon layer 5 through the nozzle 63;

[0048] In step S4 , the activated carbon layer 5 adsorbs ammonia in the exhaust gas to purify the exhaust gas, and then discharges the purified gas through the exhaust pipe 4 .

[0049] In step S2 and step S3: R is the frequency of the alternating forward and reverse rotation of the motor 6, R max is the maximum forward and reverse alternating rotation frequency of motor 6, Q is the exhaust gas concentration, Q max The maximum exhaust gas concentration generated by the production of cyclopropylamine, the higher the exhaust gas concentration, the faster the frequency of the alternating forward and reverse rotation of the motor 6;

[0050] When the exhaust gas concentration is high, the frequency of alternating forward and reverse rotation of the motor 6 is increased, thereby increasing the frequency of spraying the catalyst solution on the surface of the activated carbon layer 5, which can fully guarantee and improve its adsorption capacity. When the exhaust gas concentration is low, it can not only ensure the adsorption capacity of the activated carbon, but also relatively reduce the operating energy consumption of the motor 6, thereby reducing the operating cost of the device.

[0051] In step S2 and step S3: F is the pressure of the external water pump, F max is the maximum pressure of the external water pump. The higher the exhaust gas concentration, the greater the pressure of the external water pump.

[0052] When the exhaust gas concentration is high, the pressure of the external water pump is increased, so that the injection intensity of the catalyst solution from the nozzle 63 can be increased, and the catalyst solution can be smoothly injected onto the activated carbon. When the exhaust gas concentration is low, it can ensure that the nozzle 63 can inject the catalyst solution onto the activated carbon, and avoid excessive use of the catalyst due to excessive injection intensity, thereby saving the catalyst solution.

[0053] In the description of the present invention, it is necessary to understand that the terms "up", "down", "front", "back", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0054] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Although the present invention has been described in detail with reference to the above embodiments, a person skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some of the technical features can be replaced by equivalents, and these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A distributed waste gas recovery device based on cyclopropylamine production, comprising a waste gas recovery machine, characterized in that: The waste gas recovery machine comprises a recovery chamber (1), the left side of the recovery chamber (1) is connected to a recovery pipe (2), the left side of the recovery pipe (2) is connected to a plurality of distribution pipes (3), and the right side of the recovery chamber (1) is connected to an exhaust pipe (4); An activated carbon layer (5) is fixedly installed in the middle of the inner wall of the recovery chamber (1), and a spray mechanism is arranged on the left side of the activated carbon layer (5), the spray mechanism comprising a motor (6), a rotating shaft (61), a spray gun (62), and a plurality of spray pipes (63), the rotating shaft (61) is fixedly connected to the output end of the motor (6), the spray gun (62) is fixedly installed on the outside of the rotating shaft (61), and the plurality of spray pipes (63) are all connected to the right side of the spray gun (62) and face the activated carbon layer (5), the spray gun (62) is connected to an external water pump pipeline, and the external water pump is connected to a catalyst solution pipeline, a gas concentration detector is arranged inside the recovery pipe (2), a control panel (7) is fixedly installed on one side of the recovery chamber (1), and an intelligent recovery system is arranged inside the control panel (7), and the intelligent recovery system comprises a gas concentration detection module and an intelligent control module; The gas concentration detection module is arranged inside the gas concentration detector and is electrically connected to the intelligent control module. The gas concentration detection module is used to detect the exhaust gas concentration through the gas concentration detector. The intelligent control module is used to control the alternating forward and reverse rotation of the motor (6) and the rotation frequency according to the exhaust gas concentration, and to control the operating power of the external water pump. An elastic telescopic rod (8) is fixedly mounted on the left side of the inner wall of the recovery chamber (1). The right end bearing of the elastic telescopic rod (8) is connected to a rotating rod (81). A bevel gear disk (82) is fixedly mounted on the right end of the rotating rod (81). A plurality of fan blades (821) are fixedly mounted on the outer side of the bevel gear disk (82); A bevel gear (611) is fixedly mounted on one end of the rotating shaft (61), and the bevel gear (611) and the bevel gear plate (82) are meshed with each other; a connecting plate (83) is fixedly mounted below the elastic telescopic rod (8); a connecting rod (831) is fixedly connected to the lower end of the connecting plate (83); and a fixing block (832) is fixedly mounted on the rear end of the connecting rod (831); The upper and lower ends of the fixed block (832) are both fixedly mounted with extrusion balls (833); a mounting rod (612) is fixedly mounted on one side of the bevel gear (611); a sphere (613) is fixedly mounted on one end of the mounting rod (612); the lower right side of the sphere (613) and the upper left side of the extrusion ball (833) are in contact with each other; A spring is provided inside the elastic telescopic rod (8); a fixing plate (834) is fixedly mounted on the front end of the connecting rod (831); and the fixing plate (834) is fixedly connected to the left side of the motor (6).

2. A distributed waste gas recovery device based on cyclopropylamine production according to claim 1, characterized in that: The waste gas recovery step of the waste gas recovery machine includes the following: Step S1, the exhaust gas enters the recovery pipe (2) through a plurality of distribution pipes (3), and then enters the recovery chamber (1); Step S2, the intelligent recovery system is operated, the exhaust gas concentration is detected by the gas concentration detector, and then the motor (6) is controlled to rotate alternately in the forward and reverse directions according to the exhaust gas concentration, and the frequency of the alternating rotation in the forward and reverse directions is controlled, and the operation of the external water pump is controlled, and the operating power of the external water pump is controlled, thereby controlling the pressure of the external water pump; Step S3, the nozzle (63) rotates alternately clockwise and counterclockwise via the rotating shaft (61), while an external water pump draws the catalyst solution and sprays it onto the activated carbon layer (5) via the nozzle (63); Step S4: The activated carbon layer (5) adsorbs ammonia in the exhaust gas to purify the exhaust gas, and then discharges the purified gas through the exhaust pipe (4).

3. A distributed waste gas recovery device based on cyclopropylamine production according to claim 2, characterized in that: In the steps S2 and S3: , is the frequency of the alternating forward and reverse rotation of the motor (6), is the maximum forward and reverse alternating rotation frequency of the motor (6), is the exhaust gas concentration, The maximum exhaust gas concentration generated in the production of cyclopropylamine is such that the higher the exhaust gas concentration, the faster the frequency of the alternating forward and reverse rotation of the motor (6).

4. A distributed waste gas recovery device based on cyclopropylamine production according to claim 3, characterized in that: In the steps S2 and S3: , is the pressure of the external water pump, is the maximum pressure of the external water pump. The higher the exhaust gas concentration, the greater the pressure of the external water pump.

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