Waste gas absorption method and device for difenoconazole intermediate

Abstract

The invention relates to the technical field of pesticide preparation, in particular to a difenoconazole intermediate waste gas absorption method and device.The waste gas absorption device comprises a condensation mechanism and a recovery mechanism. A first detection part is arranged behind the condensation mechanism and is used for detecting the concentration of condensed waste gas; the condensed waste gas enters the recycling mechanism to be further recycled, the recycling mechanism comprises an absorption unit and a pyrolysis unit, a first detection part is arranged behind the recycling unit and used for detecting whether the absorbed waste gas meets the emission requirement or not, and the pyrolysis unit conveys pyrolysis gas to the condensation mechanism again. According to the device and the method, effective components in the waste gas are recycled, the production cost is reduced, and the problems of environmental pollution and potential safety hazards of workers caused by gas emission are avoided.

Description

Technical Field

[0001] The invention relates to the technical field of pesticide preparation, and in particular to a method and a device for absorbing waste gas of a difenoconazole intermediate. Background Art

[0002] Difenoconazole is a highly effective, low-toxic broad-spectrum fungicide with broad application prospects in the pesticide industry. During the production process of difenoconazole, a large amount of waste gas is generated. If the waste gas is directly discharged into the atmosphere without treatment, the harmful substances in the waste gas may enter the water and soil through atmospheric circulation and precipitation, causing long-term negative impacts on the ecological environment.

[0003] In addition, if the concentration of harmful substances in the exhaust gas is too high, it may also pose a threat to the health of production workers. Long-term inhalation of these harmful substances may lead to occupational diseases or other health problems.

[0004] The waste gas of fenpropimorph intermediates often contains some valuable components, such as incompletely reacted raw materials, intermediate products, etc. (mainly gases such as toluene or dichloroethane). Recycling these valuable components can improve resource utilization, help reduce production costs, and achieve sustainable utilization of resources.

[0005] However, at present, the waste gas absorption in the production process of fenpropimorph generally adopts the spray absorption method, which fully contacts the waste gas with the solvent to achieve the dissolution and recovery of the waste gas. On the one hand, this method requires a large amount of solvent, which increases the production cost. On the other hand, due to the different physical states of the waste gas and the solvent, the contact time between the two is difficult to control, which inevitably leads to the phenomenon of incomplete waste gas absorption. Summary of the invention

[0006] In order to solve the aforementioned technical problems, the present invention provides a method and device for absorbing waste gas of a fenpropimorph intermediate, which adopts a condensation method and a solid-state absorption method to complete the absorption of waste gas, and cooperates with waste gas concentration detection. On the one hand, it solves the high cost problem of solvent absorption, and on the other hand, it solves the environmental pollution and safety hazards caused by incomplete waste gas absorption. It is specifically achieved through the following technical scheme.

[0007] The present invention discloses a waste gas absorption device for a fenpropimorph intermediate, comprising a condensing mechanism and a recovery mechanism, wherein an air inlet end of the condensing mechanism is connected to an exhaust port of a reaction device via a pipeline equipped with an electromagnetic flow valve, the condensing mechanism is arranged in a cooling pool containing circulating water, an air outlet end of the condensing mechanism is connected to an air inlet end of a first electric three-way valve via a pipeline equipped with a first detection unit, a first air outlet end of the first electric three-way valve is connected to an air inlet end of the electromagnetic flow valve via a pipeline equipped with a one-way valve, and a second air outlet end of the first electric three-way valve is connected to an air inlet end of the recovery mechanism.

[0008] The recovery mechanism includes a first recovery part, a second recovery part, and a third recovery part. The first recovery part, the second recovery part, and the third recovery part respectively contain activated carbon. The air inlet end of the recovery mechanism is connected with the first recovery part. The first recovery part is connected with the air inlet end of the second electric three-way valve through a pipeline installed with the second detection part. The first air outlet end of the second electric three-way valve is connected with the outside world. The second air outlet end of the second electric three-way valve is connected with the second recovery part. The second recovery part is connected with the outside world.

[0009] A hot air blower connected to the third recovery part is installed below the third recovery part, and the third recovery part is connected to the air inlet end of the electromagnetic flow valve through a pipeline installed with a one-way valve.

[0010] The electromagnetic flow valve, the first electric three-way valve, the second electric three-way valve, the first detection unit, and the second detection unit are respectively connected to controller signals, and the controller is connected to an alarm signal.

[0011] Preferably, the recovery mechanism also includes a first pipeline, the second air outlet end of the first electric three-way valve is connected to the first pipeline, the first pipeline is fixed on the end cover, the first pipeline is docked with and connected to the first recovery part, and a second pipeline and a third pipeline are also fixed on the end cover respectively, the second pipeline is docked with and connected to the second recovery part, and the third pipeline is docked with and connected to the third recovery part.

[0012] The first pipeline, the second pipeline and the third pipeline are evenly distributed on the end cover, and a ring groove is coaxially opened on one side of the end cover close to the first recovery part, and notches are opened on the outer side of the ring groove at positions aligned with the first pipeline, the second pipeline and the third pipeline.

[0013] The structure composed of the first pipeline, the second pipeline, the third pipeline, the end cover, the annular groove and the notch is symmetrically distributed in two groups about the center of the first recovery part, and the two end covers are respectively fixed to the two ends of the connecting shaft. A rotating clamp is rotatably installed in the middle of the connecting shaft, and three clamping grooves are evenly arranged on the rotating clamp, and the first recovery part, the second recovery part and the third recovery part are respectively installed in the three clamping grooves.

[0014] Preferably, the first recovery part includes a mounting tube, which is arranged in the annular groove and can slide along its circumference, the first end of the mounting tube can be connected with the first pipe, the second pipe, and the third pipe respectively, the mounting tube can be slidably mounted on the outside of the guide pipe, the second end of the mounting tube is fixed to a plurality of springs, the springs are fixed to the flow equalizing box, and the flow equalizing box is fixed to and connected with the guide pipe.

[0015] The flow balancing box is fixedly connected to several recovery pipes respectively, and activated carbon is contained in the recovery pipes. The structure composed of the mounting pipe, the guide pipe, the spring and the flow balancing box is symmetrically distributed in two groups about the center line of the recovery pipe, and the second end of the recovery pipe is fixedly connected to the second group of flow balancing boxes.

[0016] The middle parts of the plurality of recovery pipes are fixed to a clamping block, the clamping block is installed in a clamping groove and can move radially along the rotating clamping ring, and a handle is fixedly installed on the side of the clamping block.

[0017] Preferably, the condensing mechanism comprises a condensing tube, a plurality of heat exchange fins are evenly fixed on the outer surface of the condensing tube along the height direction thereof, and the condensing tube and the heat exchange fins are arranged below the liquid surface of the cooling pool; The bottom of the condenser tube is fixedly connected with a plurality of collecting tubes, and the collecting tubes are fixedly connected with the collecting box.

[0018] Preferably, the hot air blower includes a wind tube, which is installed on the lower surface of the second end cover, and the wind tube is coaxially arranged with the third pipe. A motor is installed in the wind tube, and the motor is connected to the controller signal. The output shaft of the motor is coaxially fixed with the fan, and a heating wire is arranged above the fan, and the heating wire is installed on the inner surface of the wind tube.

[0019] Preferably, the first detection part and the second detection part have the same structure, the first detection part includes a concentration detector, a probe of the concentration detector seal passes through the top of the detection chamber and is arranged in the detection chamber, the top of the detection chamber is fixedly connected to the air inlet pipe, and the bottom of the detection chamber is fixedly connected to the air outlet pipe.

[0020] Preferably, a chamfer is provided at the first end of the mounting tube close to the end cover.

[0021] Preferably, the cross-sectional shape of the outer surface of the guide tube is a square, and the cross-sectional shape of the inner surface of the mounting tube is a square matching the cross-sectional shape of the outer surface of the guide tube.

[0022] Preferably, the spring is always in a compressed state.

[0023] The present invention discloses a method for absorbing waste gas of a difenoconazole intermediate, and the specific operation steps are as follows: S1. The controller controls the electromagnetic flow valve to open, and the exhaust gas is passed into the condensing mechanism. The exhaust gas passing through the condensing mechanism enters the first detection part to complete the concentration detection, and is transmitted to the controller as the first detection value.

[0024] S2. When the first detection value is greater than the first preset concentration value, the controller controls the first outlet end of the first electric three-way valve to open; when the first detection value is less than or equal to the first preset concentration value, the controller controls the second outlet end of the first electric three-way valve to open.

[0025] S3. When the first detection value is greater than the first preset concentration value for a duration greater than the first preset time, the controller controls the electromagnetic flow valve to reduce the flow.

[0026] S4. After the exhaust gas is input into the first recovery part through the second outlet port of the first electric three-way valve to complete absorption, it enters the second detection part to complete concentration detection, and is transmitted to the controller as a second detection value.

[0027] S5. When the second detection value is greater than the second preset concentration value, the controller controls the first outlet end of the second electric three-way valve to open; when the second detection value is less than or equal to the second preset concentration value, the controller controls the second outlet end of the second electric three-way valve to open.

[0028] S6. When the second detection value is greater than the second preset concentration value for a duration greater than the second preset time, the controller controls the alarm to start.

[0029] S7. After the alarm is activated, the operator replaces the first recovery section to the position of the third recovery section, replaces the third recovery section to the position of the second recovery section, and replaces the second recovery section to the position of the first recovery section. After the replacement is completed, the controller controls the hot air blower to start and continue to run for a third preset time.

[0030] After adopting the above technical solution, the beneficial effects of the present invention are: 1. By combining the condensation method with the activated carbon adsorption method, the effective components in the waste gas can be fully recycled and utilized, which can reduce some production costs on the one hand and avoid the pollution of the environment by directly discharging waste gas on the other hand.

[0031] 2. The exhaust gas concentration is detected after the condensation stage and the activated carbon absorption stage respectively, and the direction of the exhaust gas is controlled by the measured exhaust gas concentration value to ensure that the effective components in the exhaust gas are treated more thoroughly.

[0032] 3. Through the recycling of the absorption device in the activated carbon absorption link, the workers' operating steps are simplified, the operating difficulty of the workers is reduced, and the work efficiency is improved.

[0033] 4. Through the mutual coordination, automatic control and adjustment of various links, the automatic operation of recovering effective components in exhaust gas is realized, avoiding the potential safety hazards to workers caused by intensive manual operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0035] Figure 1 A schematic diagram of a waste gas absorption device for a difenoconazole intermediate; Figure 2 for Figure 1 A three-dimensional diagram of the recovery mechanism; Figure 3 for Figure 2 A partial cutaway diagram of some parts in the middle; Figure 4 for Figure 3 A partial enlarged view of Figure 5 for Figure 1 The structural diagram of the condensation mechanism; Figure 6 for Figure 1 A schematic diagram of the structure of the first detection unit; Figure 7 for Figure 1 Schematic diagram of a partial cutaway of a medium heat blower.

[0036] Description of reference numerals: 101-reaction device, 102-electromagnetic flow valve, 103-cooling pool, 104-water inlet pipe, 105-water outlet pipe, 106-first electric three-way valve, 107-second electric three-way valve; 110-first detection part, 111-concentration detector, 112-detection chamber, 113-inlet pipe, 114-outlet pipe, 120-second detection part; 200- condensing mechanism, 201- condensing tube, 202- heat exchanger, 203- collecting tube, 204- collecting box; 300-recovery mechanism, 301-first pipeline, 302-second pipeline, 303-third pipeline, 304-end cover, 305-connecting shaft, 306-rotating clamping ring, 307-slot, 308-annular groove, 309-notch; 320-first recovery part, 321-installation tube, 323-guide tube, 324-spring, 325-current equalizing box, 326-recovery tube, 327-block, 328-handle, 330-second recovery part, 340-third recovery part; 400-hot air blower, 401-air cylinder, 402-motor, 403-fan, 404-heating wire; 500-controller, 501-siren. DETAILED DESCRIPTION

[0037] The features and exemplary embodiments of various aspects of the present invention will be described in detail below. In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only configured to explain the present invention and are not configured to limit the present invention. For those skilled in the art, the present invention can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present invention by illustrating examples of the present invention.

[0038] The directional words appearing in the following description are all directions shown in the figures, and do not limit the specific structure of the present invention. In the description of the present invention, it should also be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" 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 directly connected or indirectly connected. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0039] The embodiment of the present invention provides a waste gas absorption device for difenoconazole intermediates, see Figure 1 , 2 3. The waste gas absorption device includes a condensing mechanism 200 and a recovery mechanism 300. The air inlet end of the condensing mechanism 200 is fixedly connected to the waste gas output end of the reaction device 101 through a pipeline, and an electromagnetic flow valve 102 is installed on the pipeline to control the waste gas intake flow of the condensing mechanism 200.

[0040] The condensing mechanism 200 is arranged in a cooling pool 103. The cooling pool 103 contains circulating water for heat dissipation and cooling of the condensing mechanism 200. The air outlet end of the condensing mechanism 200 is fixedly connected to the air inlet end of the first electric three-way valve 106 via a pipeline equipped with a first detection unit 110. The first detection unit 110 can detect the exhaust gas concentration. The first air outlet end of the first electric three-way valve 106 is connected to the air inlet end of the electromagnetic flow valve 102 via a pipeline equipped with a one-way valve. The second air outlet end of the first electric three-way valve 106 is fixedly connected to the air inlet end of the recovery mechanism 300.

[0041] The recovery mechanism 300 includes a first recovery part 320, a second recovery part 330, and a third recovery part 340. Activated carbon is contained in the first recovery part 320, the second recovery part 330, and the third recovery part 340. The air inlet end of the recovery mechanism 300 is connected to the first end of the first recovery part 320, and the second end of the first recovery part 320 is fixedly connected to the air inlet end of the second electric three-way valve 107 through a pipeline installed with the second detection part 120. The second detection part 120 can detect the concentration of exhaust gas. The first air outlet end of the second electric three-way valve 107 is connected to the outside world, and the second air outlet end of the second electric three-way valve 107 is connected to the first end of the second recovery part 330. The second end of the second recovery part 330 is connected to the outside world. The first recovery part 320 and the second recovery part 330 can effectively absorb the exhaust gas in the gas through the activated carbon installed therein.

[0042] A hot air blower 400 connected to the first end of the third recovery part 340 is installed, and the hot air blower 400 can inject hot air into the third recovery part 340. The second end of the third recovery part 340 is connected to the air inlet end of the electromagnetic flow valve 102 through a pipeline equipped with a one-way valve.

[0043] The electromagnetic flow valve 102 , the first electric three-way valve 106 , the second electric three-way valve 107 , the first detection unit 110 , and the second detection unit 120 are respectively connected to the controller 500 by signals, and the controller 500 is connected to the alarm 501 by signals.

[0044] Among them, the bottom of the cooling pool 103 is fixedly connected and communicated with the water inlet pipe 104, and the top of the cooling pool 103 is fixedly connected and communicated with the water outlet pipe 105. The circulating water in the cooling pool 103 flows into the water inlet pipe 104 and flows out of the water outlet pipe 105, and the circulating water always maintains room temperature, thereby realizing effective cooling of the condensing mechanism 200.

[0045] Among them, a one-way valve is installed on the pipeline connecting the second end of the third recovery part 340 and the air inlet end of the electromagnetic flow valve 102, which allows the exhaust gas in the pipeline to flow only from the second end of the third recovery part 340 to the air inlet end of the electromagnetic flow valve 102.

[0046] Among them, the first recovery part 320, the second recovery part 330, and the third recovery part 340 have the same structure but different positions, so the operator can adjust and replace the positions of the first recovery part 320, the second recovery part 330, and the third recovery part 340 to make them play different roles.

[0047] The first electric three-way valve 106 and the second electric three-way valve 107 are identical electric three-way valves, which can only connect the air inlet with one of the air outlets, that is, when one of the air outlets is opened, the other air outlet is automatically closed.

[0048] Among them, a one-way valve is installed on the pipeline connecting the first outlet end of the first electric three-way valve 106 and the inlet end of the electromagnetic flow valve 102, which allows the exhaust gas in the pipeline to flow only from the first outlet end of the first electric three-way valve 106 to the inlet end of the electromagnetic flow valve 102.

[0049] Through the above-mentioned embodiment, the present invention absorbs and treats the waste gas of the fenpropimorph intermediate produced in the reaction device 101. First, the waste gas is transported to the condensation mechanism 200 through the electromagnetic flow valve 102. Because in the production process of fenpropimorph, the high temperature environment in the reaction device 101 causes the waste gas temperature to be relatively high, generally exceeding 100°C, and the main components of the waste gas are mainly toluene and dichloroethane (liquefaction temperature is 80°C to 90°C). Therefore, after the waste gas passes through the condensation mechanism 200, the effective components in the waste gas can be effectively liquefied and then recycled.

[0050] There are still some effective components remaining in the waste gas after passing through the condensation mechanism 200, so the waste gas continues to be passed into the recovery mechanism 300, and the effective components in the waste gas are further absorbed by the first recovery part 320 and the second recovery part 330, so that the waste gas meets the emission conditions.

[0051] After the first recovery section 320 and the second recovery section 330 absorb the effective components in the exhaust gas, they are transferred to the location of the third recovery section 340 by the operator, and the effective components of the exhaust gas adsorbed on the activated carbon inside are thermally desorbed by the hot air blower 400, and the desorbed gas is recycled and absorbed as exhaust gas, thereby realizing secondary recovery of the effective components in the exhaust gas.

[0052] The above method can safely and thoroughly complete the recovery and reuse of effective components in the waste gas, which can save part of the production cost on the one hand, and reduce the pollution of the waste gas emission to the environment on the other hand.

[0053] The present invention uses the above-mentioned device to complete the waste gas absorption of the difenoconazole intermediate, and the specific method includes the following steps: S1. The controller 500 controls the electromagnetic flow valve 102 to open, and passes the exhaust gas into the condensing mechanism 200. The exhaust gas passing through the condensing mechanism 200 enters the first detection part 110 to complete the concentration detection of the effective components therein, and is transmitted to the controller 500 as the first detection value.

[0054] The waste gas generated during the reaction process in the reaction device 101 is transmitted to the condensation mechanism 200 through a pipeline when the electromagnetic flow valve 102 is opened, and condensation is completed in the condensation mechanism 200 to achieve the recovery of some effective components in the waste gas. In this process, the effective components in the waste gas are reduced, and the concentration value is measured, thereby effectively controlling the direction of the waste gas.

[0055] S2. When the first detection value is greater than the first preset concentration value, the controller 500 controls the first outlet end of the first electric three-way valve 106 to open; when the first detection value is less than or equal to the first preset concentration value, the controller 500 controls the second outlet end of the first electric three-way valve 106 to open.

[0056] A target concentration value after condensation is set. When the target concentration value is exceeded, the exhaust gas needs to be condensed for a second cycle. When the target concentration value is not exceeded, the exhaust gas is circulated to the subsequent absorption unit.

[0057] S3. When the first detection value is greater than the first preset concentration value for a duration greater than the first preset time, the controller 500 controls the electromagnetic flow valve 102 to appropriately reduce the flow rate.

[0058] If the measured concentration value is always greater than the target concentration value for a period of time, consider whether the flow rate of the electromagnetic flow valve 102 is too large, resulting in an insignificant condensation effect. Therefore, the flow rate of the electromagnetic flow valve 102 is reduced to ensure that the effective components in the exhaust gas are fully condensed.

[0059] Among them, the first preset time is 3 minutes.

[0060] S4. The waste gas with a first detection value less than or equal to the first preset concentration value is input into the first recovery part 320, and the first recovery part 320 is used to further absorb the effective components therein. After passing through the first recovery part 320, the waste gas enters the second detection part 120 to complete the concentration detection of the effective components therein, and is transmitted to the controller 500 as the second detection value.

[0061] The waste gas whose concentration does not exceed the target concentration value is continuously circulated downward to complete further absorption of effective components in the waste gas, and the waste gas is allowed to pass through the first recovery unit 320 to complete the first absorption, and the concentration value after absorption is measured.

[0062] S5. When the second detection value is greater than the second preset concentration value, the controller 500 controls the first outlet end of the second electric three-way valve 107 to open; when the second detection value is less than or equal to the second preset concentration value, the controller 500 controls the second outlet end of the second electric three-way valve 107 to open.

[0063] When the concentration value measured by the second detection unit 120 reaches the exhaust gas emission standard, the gas can be discharged directly. Otherwise, when the exhaust gas emission standard is reached, the exhaust gas needs to be once again absorbed by the second recovery unit 330 for a second time before being discharged.

[0064] S6. When the second detection value is greater than the second preset concentration value for a duration greater than the second preset time, the controller 500 controls the alarm 501 to start.

[0065] When the concentration value measured by the second detection unit 120 is greater than the second preset concentration value for a period of time, it is considered that the activated carbon in the first recovery unit 320 has reached an adsorption saturation state, and an alarm is issued to remind the operator to perform a replacement operation.

[0066] Among them, the second preset time is 5 minutes.

[0067] S7. After the alarm 501 is activated, the operator replaces the first recovery section 320 to the position of the third recovery section 340, the third recovery section 340 to the position of the second recovery section 330, and the second recovery section 330 to the position of the first recovery section 320. After the replacement is completed, the controller 500 controls the hot air blower 400 to start and continue to run for a third preset time.

[0068] Among them, the third preset time is 20 minutes.

[0069] The operator performs a replacement operation to transfer the adsorption-saturated first recovery section 320 to the position of the third recovery section 340, and thermally desorbs the adsorbed effective components through the hot air blower 400, and circulates the desorbed gas to the air inlet end of the electromagnetic flow valve 102, and circulates and condenses it again to achieve recovery.

[0070] For further explanation of the present invention, see Figure 2 , 3 4. The recovery mechanism 300 also includes a first pipeline 301, a second pipeline 302, a third pipeline 303, an end cover 304, a connecting shaft 305, a rotating clamp ring 306, a clamping groove 307, an annular groove 308, and a notch 309. The second gas outlet end of the first electric three-way valve 106 is fixedly connected to the first pipeline 301 through a pipeline. The first pipeline 301 is fixedly installed on the end cover 304. The first pipeline 301 is connected to and communicated with the first recovery part 320. The second pipeline 302 and the third pipeline 303 are also fixedly installed on the end cover 304, and the second pipeline 302 is connected to the third pipeline 303. The second recovery part 330 is butted against and connected, the third pipeline 303 is butted against and connected with the third recovery part 340, the first pipeline 301, the second pipeline 302, and the third pipeline 303 are evenly distributed on the end cover 304, and a circular groove 308 is coaxially provided on the surface of one side of the end cover 304 close to the first recovery part 320, the first recovery part 320, the second recovery part 330 and the third recovery part 340 can slide along the circular groove 308, and notches 309 are provided on the outer side of the circular groove 308 at positions aligned with the first pipeline 301, the second pipeline 302, and the third pipeline 303.

[0071] The structure composed of the first pipe 301, the second pipe 302, the third pipe 303, the end cover 304, the annular groove 308, and the notch 309 is symmetrically distributed in two groups about the center of the first recovery part 320. The two end covers 304 are coaxially fixed to the two ends of the connecting shaft 305 respectively. A rotating retaining ring 306 is rotatably installed in the middle of the connecting shaft 305. The outer surface of the rotating retaining ring 306 is evenly provided with three retaining grooves 307 along the circumferential direction. The first recovery part 320, the second recovery part 330 and the third recovery part 340 are respectively installed in the three retaining grooves 307.

[0072] The first recovery part 320 includes a mounting tube 321, a guide tube 323, a spring 324, a flow equalizing box 325, a recovery tube 326, a block 327, and a handle 328. The mounting tube 321 is arranged in the annular groove 308 and can slide along its circumference. The first end of the mounting tube 321 can be connected with the first pipe 301, the second pipe 302, and the third pipe 303 respectively. The mounting tube 321 is sleeved on the outside of the guide tube 323 and can move along it. The second end of the mounting tube 321 is fixedly connected to the first end of a plurality of springs 324, and the second ends of the plurality of springs 324 are fixedly connected to the flow equalizing box 325. The flow equalizing box 325 is coaxially fixed and connected with the guide tube 323.

[0073] The flow equalizing box 325 is fixedly connected and communicated with the first ends of several recovery tubes 326 respectively. Activated carbon is contained in the recovery tubes 326. The structure composed of the mounting tube 321, the guide tube 323, the spring 324 and the flow equalizing box 325 is symmetrically distributed in two groups about the center line of the recovery tube 326, and the second end of the recovery tube 326 is fixedly connected and communicated with the second group of flow equalizing boxes 325.

[0074] The middle parts of the plurality of recovery tubes 326 are fixedly connected to the clamping block 327 . The clamping block 327 is installed in the clamping groove 307 and can move along the radial direction of the rotating clamping ring 306 . A handle 328 is fixedly installed on the side of the clamping block 327 .

[0075] The above structure can facilitate the operator to replace the positions of the first recovery part 320, the second recovery part 330, and the third recovery part 340. First, the exhaust gas flows into the first recovery part 320 through the first pipe 301 to complete the first absorption of the effective components. The exhaust gas discharged from the first recovery part 320 is detected by the second detection part 120 to determine whether it needs to continue to pass through the second recovery part 330 before being discharged to the outside.

[0076] When the alarm 501 is triggered, it reminds that the activated carbon adsorption in the first recovery unit 320 has basically reached the saturation state. At this time, the operator only needs to follow Figure 2 The rotating retaining ring 306 is rotated in the rotation direction shown, and the rotation angle is 120°. At this time, the positions of the first recovery part 320, the second recovery part 330, and the third recovery part 340 are replaced.

[0077] The first end of the installation tube 321 is chamfered, and the purpose of this structural design is to facilitate the connection of the installation tube 321 with the first pipeline 301, the second pipeline 302, and the third pipeline 303 respectively.

[0078] Among them, the cross-sectional shape of the outer surface of the guide tube 323 is a square, and the cross-sectional shape of the inner surface of the mounting tube 321 is a square that matches the cross-sectional shape of the outer surface of the guide tube 323. This structure enables the guide tube 323 to guide the mounting tube 321, so that the mounting tube 321 can only slide up and down along the height direction of the guide tube 323.

[0079] The spring 324 is always in a compressed state. The purpose of this design is to ensure the tightness of the connection when the installation pipe 321 is connected to the first pipe 301, the second pipe 302, and the third pipe 303 respectively under the elastic force of the spring 324.

[0080] The cross-sectional shape of the block 327 is square, and the cross-sectional shape of the slot 307 is U-shaped to match the cross-sectional shape of the block 327 . This structure facilitates the installation or removal of the first recovery part 320 , the second recovery part 330 , and the third recovery part 340 on the slot 307 .

[0081] When the operator changes the positions of the first recovery unit 320, the second recovery unit 330 and the third recovery unit 340, according to Figure 2 Rotate the rotating retaining ring 306 in the rotation direction shown, taking the first recovery part 320 as an example, at this time, the mounting tube 321 at the top of the first recovery part 320 is docked with the first pipe 301, and when the operator starts to rotate the rotating retaining ring 306, under the configuration relationship between the slot 307 and the block 327, the rotating retaining ring 306 drives the first recovery part 320 to rotate synchronously, causing the mounting tube 321 to slide downward to compress the spring 324, thereby realizing the separation of the mounting tube 321 from the first pipe 301. During the rotation of the first recovery part 320, the mounting tube 321 is configured in the annular groove 308 and slides along it until the mounting tube 321 slides to align with the third pipe 303. At this time, under the elastic force of the spring 324, the mounting tube 321 slides upward to complete the docking with the third pipe 303.

[0082] like Figure 2 The rotation direction shown causes the first recovery part 320 that has reached the adsorption saturation state to rotate to a position aligned with the third pipe 303 to facilitate thermal desorption, while the second recovery part 330 that has not reached the adsorption saturation state rotates to a position aligned with the first pipe 301 to continue to complete the adsorption of effective components in the exhaust gas. The third recovery part 340 that has undergone thermal desorption rotates to a position aligned with the second pipe 302 for compensatory adsorption of the exhaust gas.

[0083] Through the above method, the recycling of the first recovery section 320, the second recovery section 330, and the third recovery section 340 is realized, and the effective components in the exhaust gas are fully absorbed and recovered. The process is simple and convenient to operate, and the efficiency is greatly improved. Of course, the operator can also directly achieve the above operation by replacing the first recovery section 320, the second recovery section 330, and the third recovery section 340.

[0084] In addition, when the first recovery part 320, the second recovery part 330, and the third recovery part 340 cannot be used any longer due to structural damage or other factors, the operator can directly remove the first recovery part 320, the second recovery part 330, or the third recovery part 340 from the slot 309 to complete the replacement.

[0085] For further explanation of the present invention, see Figure 5 , Figure 1 The condensation mechanism 200 includes a condenser 201, a heat exchange plate 202, a collection tube 203, and a collection box 204. The first end of the condenser 201 is fixedly connected to the air outlet end of the electromagnetic flow valve 102 through a pipeline, and the second end of the condenser 201 is fixedly connected to the air inlet end of the first detection unit 110 through a pipeline. A plurality of heat exchange plates 202 are evenly fixed on the outer surface of the condenser 201 along its height direction. The condenser 201 and the heat exchange plates 202 are arranged below the liquid level of the cooling pool 103.

[0086] The bottom of the condensing tube 201 is fixedly connected to the first ends of a plurality of collecting tubes 203 , and the second ends of the collecting tubes 203 are fixedly connected and connected to the collecting box 204 .

[0087] The above structure in this embodiment can ensure sufficient heat exchange between the exhaust gas entering the condenser 201 and the circulating water in the cooling pool 103, so that the effective components in the exhaust gas are condensed into liquid and flow into the collection box 204 along the collection pipe 203 fixed at the bottom of the condenser 201 to complete collection.

[0088] For further explanation of the present invention, see Figure 6 The first detection part 110 includes a concentration detector 111, a detection chamber 112, an air inlet pipe 113, and an air outlet pipe 114. The probe of the concentration detector 111 sealably passes through the top of the detection chamber 112 and is arranged in the detection chamber 112. The top of one side of the detection chamber 112 is fixed and connected to the air inlet pipe 113, and the bottom of the other side of the detection chamber 112 is fixedly connected and connected to the air outlet pipe 114.

[0089] The second detection unit 120 has the same structure as the first detection unit 110 .

[0090] The present invention transports the exhaust gas into the detection chamber 112 through the air inlet pipe 113 located at the top of the detection chamber 112 and discharges it through the air outlet pipe 114 located at the bottom of the detection chamber 112, so that the air flow in the detection chamber 112 flows from top to bottom, thereby increasing the residence time of the effective components in the exhaust gas and facilitating the probe of the concentration detector 111 to detect the exhaust gas concentration in the detection chamber 112.

[0091] For further explanation of the present invention, see Figure 7 The hot air blower 400 includes a wind tube 401, a motor 402, a fan 403, and a heating wire 404. The wind tube 401 is fixedly installed on the lower surface of the second end cover 304, and the wind tube 401 is coaxially arranged with the third pipe 303. The motor 402 is fixedly installed in the wind tube 401, and the motor 402 is connected to the controller 500 by signal. The output shaft of the motor 402 is coaxially fixed with the fan 403. The heating wire 404 is arranged directly above the fan 403, and the heating wire 404 is fixedly installed on the inner surface of the wind tube 401.

[0092] The above structure of the present invention enables the controller 500 to control the motor 402 to start, thereby driving the fan 403 to rotate, and sending the heated air in the air cylinder 401 into the Figure 2 In the third recovery section 340 shown, separation of activated carbon and effective components of exhaust gas in the third recovery section 340 is achieved.

[0093] According to the embodiments of the present invention as described above, these embodiments do not describe all the details in detail, nor do they limit the invention to specific embodiments. Obviously, many modifications and changes can be made based on the above description. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can make good use of the present invention and the modified use based on the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A waste gas absorption device for a difenoconazole intermediate, comprising a condensation mechanism (200) and a recovery mechanism (300), characterized in that: The air inlet end of the condensing mechanism (200) is connected to the air outlet of the reaction device (101) via a pipeline equipped with an electromagnetic flow valve (102); the condensing mechanism (200) is arranged in a cooling pool (103) containing circulating water; the air outlet end of the condensing mechanism (200) is connected to the air inlet end of the first electric three-way valve (106) via a pipeline equipped with a first detection unit (110); the first air outlet end of the first electric three-way valve (106) is connected to the air inlet end of the electromagnetic flow valve (102) via a pipeline equipped with a one-way valve; and the second air outlet end of the first electric three-way valve (106) is connected to the air inlet end of the recovery mechanism (300); The recovery mechanism (300) comprises a first recovery part (320), a second recovery part (330), and a third recovery part (340), wherein activated carbon is respectively contained in the first recovery part (320), the second recovery part (330), and the third recovery part (340), an air inlet end of the recovery mechanism (300) is in communication with the first recovery part (320), the first recovery part (320) is in communication with an air inlet end of a second electric three-way valve (107) via a pipeline on which a second detection part (120) is installed, a first air outlet end of the second electric three-way valve (107) is in communication with the outside, a second air outlet end of the second electric three-way valve (107) is in communication with the second recovery part (330), and the second recovery part (330) is in communication with the outside; A hot air blower (400) is installed below the third recovery part (340) and is in communication with the third recovery part (340). The third recovery part (340) is in communication with the air inlet end of the electromagnetic flow valve (102) via a pipeline installed with a one-way valve. The electromagnetic flow valve (102), the first electric three-way valve (106), the second electric three-way valve (107), the first detection unit (110), and the second detection unit (120) are respectively connected to the controller (500) by signal, and the controller (500) is connected to the alarm (501) by signal.

2. The waste gas absorption device of the difenoconazole intermediate according to claim 1, characterized in that: The recovery mechanism (300) further comprises a first pipeline (301), the second air outlet end of the first electric three-way valve (106) is connected to the first pipeline (301), the first pipeline (301) is fixed on the end cover (304), the first pipeline (301) is butt-jointed with and connected to the first recovery part (320), a second pipeline (302) and a third pipeline (303) are also respectively fixed on the end cover (304), the second pipeline (302) is butt-jointed with and connected to the second recovery part (330), and the third pipeline (303) is butt-jointed with and connected to the third recovery part (340); The first pipe (301), the second pipe (302), and the third pipe (303) are evenly distributed on the end cover (304); a ring groove (308) is coaxially formed on one side of the end cover (304) close to the first recovery portion (320); and notches (309) are formed on the outer side of the ring groove (308) at positions aligned with the first pipe (301), the second pipe (302), and the third pipe (303); The structure composed of the first pipe (301), the second pipe (302), the third pipe (303), the end cover (304), the annular groove (308), and the notch (309) is symmetrically distributed in two groups about the center of the first recovery part (320) in the upper and lower parts, and the two end covers (304) are respectively fixed to the two ends of the connecting shaft (305), and a rotating clamping ring (306) is rotatably installed in the middle part of the connecting shaft (305), and three clamping grooves (307) are evenly arranged on the rotating clamping ring (306), and the first recovery part (320), the second recovery part (330), and the third recovery part (340) are respectively installed in the three clamping grooves (307).

3. The waste gas absorption device of the difenoconazole intermediate according to claim 2, characterized in that: The first recovery part (320) comprises a mounting tube (321), the mounting tube (321) being arranged in the annular groove (308) and being able to slide along the circumference thereof, the first end of the mounting tube (321) being able to dock with the first pipe (301), the second pipe (302), and the third pipe (303) respectively, the mounting tube (321) being slidably sleeved on the outside of the guide pipe (323), the second end of the mounting tube (321) being fixed to a plurality of springs (324), the springs (324) being fixed to a flow equalizing box (325), and the flow equalizing box (325) being fixed to and in communication with the guide pipe (323); The flow balancing boxes (325) are respectively fixedly connected to a plurality of recovery tubes (326), wherein activated carbon is contained in the recovery tubes (326), and the structure consisting of the installation tube (321), the guide tube (323), the spring (324), and the flow balancing boxes (325) are symmetrically distributed in two groups about the center line of the recovery tubes (326), and the second ends of the recovery tubes (326) are fixedly connected to the second group of the flow balancing boxes (325); The middle parts of the plurality of recovery tubes (326) are fixed to a clamping block (327). The clamping block (327) is installed in the clamping groove (307) and can move radially along the rotating clamping ring (306). A handle (328) is fixedly installed on the side of the clamping block (327).

4. The waste gas absorption device of the difenoconazole intermediate according to claim 1, characterized in that: The condensing mechanism (200) comprises a condensing tube (201), a plurality of heat exchange fins (202) being evenly fixed on the outer surface of the condensing tube (201) along its height direction, and the condensing tube (201) and the heat exchange fins (202) are arranged below the liquid surface of the cooling pool (103); The bottom of the condensing tube (201) is fixedly connected to a plurality of collecting tubes (203), and the collecting tubes (203) are fixedly connected to a collecting box (204).

5. The waste gas absorption device of the difenoconazole intermediate according to claim 2, characterized in that: The hot air blower (400) comprises a wind tube (401), wherein the wind tube (401) is mounted on the lower surface of the second end cover (304), the wind tube (401) is coaxially arranged with the third pipe (303), a motor (402) is installed in the wind tube (401), the motor (402) is signal-connected with the controller (500), an output shaft of the motor (402) is coaxially fixed with the fan (403), and a heating wire (404) is arranged above the fan (403), and the heating wire (404) is mounted on the inner surface of the wind tube (401).

6. The waste gas absorption device of the difenoconazole intermediate according to claim 1, characterized in that: The first detection part (110) and the second detection part (120) have the same structure. The first detection part (110) comprises a concentration detector (111). A probe of the concentration detector (111) is sealed and passes through the top of a detection chamber (112) and is arranged in the detection chamber (112). The top of the detection chamber (112) is fixedly connected to an air inlet pipe (113), and the bottom of the detection chamber (112) is fixedly connected to an air outlet pipe (114).

7. The waste gas absorption device of the difenoconazole intermediate according to claim 3, characterized in that: A first end of the mounting tube (321) close to the end cover (304) is provided with a chamfered angle.

8. The waste gas absorption device of the difenoconazole intermediate according to claim 3, characterized in that: The cross-sectional shape of the outer surface of the guide tube (323) is a square, and the cross-sectional shape of the inner surface of the mounting tube (321) is a square that matches the cross-sectional shape of the outer surface of the guide tube (323).

9. The waste gas absorption device of the difenoconazole intermediate according to claim 3, characterized in that: The spring (324) is always in a compressed state.

10. A method for absorbing waste gas of a difenoconazole intermediate, characterized in that: The following steps are involved: S1, the controller (500) controls the electromagnetic flow valve (102) to open, and passes the exhaust gas into the condensing mechanism (200); the exhaust gas passing through the condensing mechanism (200) enters the first detection part (110) to complete concentration detection, and is transmitted to the controller (500) as a first detection value; S2. When the first detection value is greater than the first preset concentration value, the controller (500) controls the first gas outlet end of the first electric three-way valve (106) to open; when the first detection value is less than or equal to the first preset concentration value, the controller (500) controls the second gas outlet end of the first electric three-way valve (106) to open; S3, when the first detection value is greater than the first preset concentration value for a duration greater than the first preset time, the controller (500) controls the electromagnetic flow valve (102) to reduce the flow rate; S4, when the exhaust gas is input into the first recovery part (320) through the second outlet port of the first electric three-way valve (106) to complete absorption, it enters the second detection part (120) to complete concentration detection, and is transmitted to the controller (500) as a second detection value; S5. When the second detection value is greater than the second preset concentration value, the controller (500) controls the first gas outlet end of the second electric three-way valve (107) to open; when the second detection value is less than or equal to the second preset concentration value, the controller (500) controls the second gas outlet end of the second electric three-way valve (107) to open; S6, when the second detection value is greater than the second preset concentration value for a duration greater than the second preset time, the controller (500) controls the alarm (501) to start; S7. After the alarm (501) is activated, the operator replaces the first recovery section (320) to the position of the third recovery section (340), replaces the third recovery section (340) to the position of the second recovery section (330), and replaces the second recovery section (330) to the position of the first recovery section (320). After the replacement is completed, the controller (500) controls the hot air blower (400) to start and continue to operate for a third preset time.

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