Solvent recovery equipment for packaging and printing

Abstract

The invention discloses solvent recovery equipment for packaging and printing, belongs to the technical field of printing waste gas treatment equipment, and aims to solve the problems that a fixed gas distribution pipe is easy to cause local gas flow concentration or stagnation, activated carbon near a gas outlet is quickly and prematurely saturated, particulate matters in waste gas are deposited around the fixed gas distribution pipe, and local blockage is formed due to long-time accumulation; the dynamic gas distribution device comprises a working box and a gas inlet mechanism, and the gas inlet mechanism used for dynamic gas distribution is arranged on the lower portion of the interior of the working box. The position of the first gas outlet can dynamically change in the activated carbon in the filling cavity, an activated carbon layer is continuously disturbed, a gas flow dead angle formed by static gas distribution is eliminated, the activated carbon is prevented from being saturated too early, waste gas is evenly distributed and mixed in the activated carbon, the adsorption load is balanced, and meanwhile dust is prevented from being accumulated near the gas inlet. And the possibility of blockage is greatly reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of printing waste gas treatment equipment, and particularly to a solvent recovery device for packaging printing. Background Art

[0002] When a printing factory is working, VOCs waste gas is often volatilized from printing materials. Currently, the "granular activated carbon, activated carbon fiber adsorption + steam, hot nitrogen regeneration + condensation recovery" process is used to recover and treat the volatilized solvent in the VOCs waste gas. The waste gas containing VOCs is cooled and then pressurized by an adsorption fan and introduced into a air collecting box. After being distributed by the air collecting box to an adsorption purification bed, the organic matter contained in the waste gas is efficiently adsorbed and purified by the activated carbon. After purification, the gas is discharged up to the standard. When the concentration of organic matter in the exhaust gas of the adsorption purification bed reaches the set value, the adsorption purification bed automatically switches to the nitrogen heating desorption and organic matter recovery process flow, and at the same time, the standby adsorption purification bed automatically switches to the adsorption purification process flow. Among them, using granular activated carbon adsorption and nitrogen heating desorption is a relatively important link in solvent recovery treatment.

[0003] When the current solvent recovery device for printing is in use, when ventilating the adsorption purification bed, the fixed air distribution pipe is prone to local air flow concentration or stagnation due to uneven filling of activated carbon or compaction after long-term use, and fixed air distribution is likely to cause the activated carbon layer to delaminate and fail, resulting in rapid premature saturation of the activated carbon near the air outlet. At the same time, the fixed air distribution pipe is likely to cause particulate matter in the waste gas to deposit around the fixed air distribution pipe, and long-term accumulation will form local blockage, thus ultimately reducing the adsorption efficiency.

[0004] In view of the above problems, a solvent recovery device for packaging printing is proposed. Summary of the Invention

[0005] The purpose of the present invention is to provide a solvent recovery device for packaging printing. By using this device to work, the problems in the above background that the fixed air distribution pipe is prone to local air flow concentration or stagnation, and will cause rapid premature saturation of the activated carbon near the air outlet, and particulate matter in the waste gas deposits around the fixed air distribution pipe, and long-term accumulation will form local blockage, thus ultimately reducing the adsorption efficiency are solved.

[0006] To achieve the above object, the present invention provides the following technical solution: A solvent recovery device for packaging printing, including a working box and an air intake mechanism. The air intake mechanism for dynamic air distribution is arranged below the interior of the working box. The air intake mechanism includes an exhaust gas inlet, a desorption inlet, a first solenoid valve, an electromagnetic flow valve, a second solenoid valve, a third solenoid valve, and a first ventilation pipe. The opposite side of the exhaust gas inlet is connected to the desorption inlet, and a first solenoid valve is installed in the middle of the first ventilation pipe and the desorption inlet. An electromagnetic flow valve is installed at the front end of the first ventilation pipe and the desorption inlet, and a second solenoid valve is connected to one side of the front end of the electromagnetic flow valve. The other side of the front end of the electromagnetic flow valve is connected to a third solenoid valve, and the front end of the second solenoid valve is connected to a first ventilation pipe; The upper front of the first ventilation pipe is connected to a first guide pipe, and the upper end of the first guide pipe is provided with a lower air distribution pipe. The surface of the lower air distribution pipe is provided with a first air outlet. A rotating impeller is installed in the middle of the inner side of the first ventilation pipe, and a first synchronous pulley is arranged in the middle below the rotating impeller. The upper front of the first synchronous pulley is connected to a rotating sleeve shaft, and the upper end of the rotating sleeve shaft is fixed with a lower reciprocating lead screw. A lower sliding block is arranged on one side of the surface of the lower reciprocating lead screw.

[0007] Further, the working box includes a purification box, a filling cavity, an isolation layer board, and an exhaust port. The middle part of the inner side of the purification box is provided with a filling cavity, and an isolation layer board is installed inside the filling cavity. The middle part above the purification box is connected to an exhaust port. The isolation layer board is equidistantly arranged in three groups in the filling cavity, and the isolation layer board divides the inside of the purification box into four equal parts.

[0008] Further, the exhaust gas inlet and the desorption inlet are connected to the electromagnetic flow valve through the first solenoid valve, and the electromagnetic flow valve is connected to the first ventilation pipe through the second solenoid valve. The first ventilation pipe is connected to the first air outlet through the first guide pipe and the lower air distribution pipe, and two groups of the first guide pipe, the lower air distribution pipe, and the first air outlet are arranged below the filling cavity.

[0009] Further, the first synchronous pulley is rotationally connected to the first ventilation pipe through the rotating impeller, and the first synchronous pulley is rotationally connected to the lower reciprocating lead screw through the rotating sleeve shaft. The lower sliding block is slidably connected to the purification box through the lower reciprocating lead screw, and two groups of the lower reciprocating lead screw and the lower sliding block are fixedly arranged. Two groups of the first synchronous pulley are synchronously arranged on the left and right, and are respectively connected to the rotating sleeve shafts arranged on the left and right.

[0010] Further, a gas distribution mechanism is connected above one side of the air intake mechanism. The gas distribution mechanism includes a second ventilation pipe, a second guide pipe, an upper air distribution pipe, and a second air outlet. The upper front of the second ventilation pipe is connected to the second guide pipe, and an upper air distribution pipe is arranged on one side above the second guide pipe. The middle part of the surface of the upper air distribution pipe is provided with a second air outlet.

[0011] Furthermore, a linkage mechanism for movement is provided on one side of the air distribution mechanism. The linkage mechanism includes a second synchronous pulley, a through shaft, an upper reciprocating lead screw, and an upper sliding block. Above the front end of the second synchronous pulley, a through shaft is connected, and an upper reciprocating lead screw is fixed to the top of the through shaft. An upper sliding block is provided on one side of the surface of the upper reciprocating lead screw.

[0012] Furthermore, the electromagnetic flow valve is connected to the upper air distribution pipe and the second air outlet through a third solenoid valve, a second ventilation pipe, and a second air guide pipe. The second synchronous pulley is rotationally connected to the upper reciprocating lead screw through the through shaft, and the upper sliding block is slidably connected to the purification box through the upper reciprocating lead screw.

[0013] Furthermore, a compression mechanism for expansion buffering is provided in the middle of the inner side of the isolation layer plate. The compression mechanism includes a compression chamber, a movable baffle, a support spring, and a ventilation mesh layer. A movable baffle is provided below the inside of the compression chamber, and a support spring is connected to the upper surface of the movable baffle. A ventilation mesh layer is provided at the top of the compression chamber.

[0014] Furthermore, connection mechanisms for preventing jamming are provided on both side surfaces of the air intake mechanism. The connection mechanisms include sliding grooves, wrapping sleeves, and folding lines. A wrapping sleeve is provided in the middle of the outer surface of the sliding groove, and a folding line is provided in the middle of the surface of the wrapping sleeve.

[0015] Furthermore, the movable baffle is elastically connected to the isolation layer plate through the support spring, and the movable baffle is connected to the ventilation mesh layer through the compression chamber. The sliding grooves are respectively fixed to the lower sliding block and the upper sliding block, and the wrapping sleeve and the folding line are respectively slidably connected to the sliding groove through the lower sliding block and the upper sliding block.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. Through the intake mechanism of the present invention, when the lower air distribution pipe moves up and down in the filling cavity, the position of the first air outlet will change dynamically in the activated carbon in the filling cavity, continuously disturbing the activated carbon layer, forcing the air flow to redistribute between different heights and regions, eliminating the air flow dead zones formed by static air distribution. Moreover, the up-and-down movement of the lower air distribution pipe can reduce the residence time of the first air outlet at a certain specific position, avoiding premature saturation of the activated carbon near the first air outlet at the bottom layer, and when moving, pushing the activated carbon particles to roll slightly, enabling the waste gas to be evenly distributed and mixed in the activated carbon, balancing the adsorption load. At the same time, when the air distribution pipe moves up and down, its rod body produces a mechanical scraping effect on the deposited dust, similar to the effect of snow sweeping, preventing dust from accumulating near the air inlet, greatly reducing the possibility of blockage. And the mechanical structure driven by the air flow requires no additional power, and only through the kinetic energy of the waste gas can the movement of the air distribution pipe be finally realized, which can make full use of the waste gas energy, reduce the trouble of external power equipment and reduce the consumption of external energy. At the same time, when high-temperature nitrogen is introduced to desorb the activated carbon, the first air outlet can finally perform dynamic nitrogen distribution desorption, and the achieved effect is the same as that of the dynamic adsorption of waste gas.

[0017] 2. Through the cooperation of the intake mechanism, the air distribution mechanism and the linkage mechanism of the present invention, the upper air distribution pipe moves up and down in the third layer of the filling cavity, and finally realizes the dynamic air distribution of small air flows. It can select the dynamic air outlet of the first air outlet or the second air outlet according to the size of the gas volume during gas treatment. At the same time, when the gas flow is small and the required activated carbon for adsorption is less, the second air outlet in the middle can avoid the gas passing through the activated carbon in the filling cavity as a whole, thereby being able to shorten the unnecessary treatment distance and being beneficial to improving the treatment efficiency of the device.

[0018] 3. Through the compression mechanism and the connection mechanism of the present invention, extra space can be provided for the activated carbon to automatically adapt to the change in the volume of the activated carbon, thereby avoiding the air distribution pipe being stuck due to being squeezed and compacted by the activated carbon. And when the lower sliding block and the upper sliding block move up and down, the wrapping sleeve and the folding line can be folded and unfolded, so as to seal the sliding groove. While preventing the activated carbon from getting stuck in the sliding groove and blocking the movement, it is also beneficial to avoid gas leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is the overall external three-dimensional structure schematic diagram of the present invention; Figure 2 is the internal three-dimensional structure schematic diagram of the purification box of the present invention; Figure 3 is the three-dimensional structure schematic diagram of the waste gas inlet of the present invention; Figure 4 is the three-dimensional structure schematic diagram of the lower air distribution pipe of the present invention; Figure 5Schematic perspective view of the partial sectional view of the rotating sleeve shaft of the present invention; Figure 6 Schematic perspective view of the partial sectional view of the lower reciprocating lead screw of the present invention; Figure 7 Schematic perspective view of the partial three-dimensional structure of the upper air distribution pipe of the present invention; Figure 8 Schematic three-dimensional structure view of the rotating impeller of the present invention; Figure 9 Schematic perspective view of the partial sectional view of the purification box of the present invention; Figure 10 Front view of the internal structure of the isolation layer board of the present invention; Figure 11 For the present invention Figure 9 Enlarged structure view at position A in

[0020] In the figure: 1, working box; 101, purification box; 102, filling cavity; 103, isolation layer board; 104, exhaust port; 2, intake mechanism; 201, waste gas inlet; 202, desorption inlet; 203, first solenoid valve; 204, electromagnetic flow valve; 205, second solenoid valve; 206, third solenoid valve; 207, first ventilation pipe; 208, first guide pipe; 209, lower air distribution pipe; 210, first air outlet; 211, rotating impeller; 212, first synchronous pulley; 213, rotating sleeve shaft; 214, lower reciprocating lead screw; 215, lower sliding block; 3, air distribution mechanism; 301, second ventilation pipe; 302, second guide pipe; 303, upper air distribution pipe; 304, second air outlet; 4, linkage mechanism; 401, second synchronous pulley; 402, through rotating shaft; 403, upper reciprocating lead screw; 404, upper sliding block; 5, compression mechanism; 501, compression cavity; 502, movable baffle; 503, support spring; 504, ventilation mesh layer; 6, connection mechanism; 601, sliding groove; 602, wrapping sleeve; 603, folding line. Detailed implementation manners

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0022] In order to solve the technical problems that the fixed air distribution pipe is prone to cause local air flow concentration or stagnation, and will cause the activated carbon near the air outlet to be quickly and prematurely saturated, and the particulate matter in the waste gas deposits around the fixed air distribution pipe, and long-term accumulation will form local blockage, thus ultimately reducing the adsorption efficiency, such as Figures 1-6 AndFigure 8 As shown in the figure, the following preferred technical solutions are provided: A solvent recovery device for packaging printing, including a working box 1 and an air inlet mechanism 2 arranged below the interior of the working box 1. The working box 1 includes a purification box 101. In the middle of the inner side of the purification box 101, there is a filling cavity 102, and an isolation layer plate 103 is installed inside the filling cavity 102. In the middle above the purification box 101, there is an exhaust port 104 connected. The isolation layer plate 103 is equidistantly arranged in three groups in the filling cavity 102, and the isolation layer plate 103 divides the inside of the purification box 101 into four equal parts. The filling cavities 102 arranged in four equal parts inside the purification box 101 are all filled with activated carbon adsorption particles, and at the same time, the isolation layer plate 103 is in the shape of a breathable mesh.

[0023] The air inlet mechanism 2 includes an exhaust gas inlet 201 connected to one side below the purification box 101. On the opposite side of the exhaust gas inlet 201, there is a desorption inlet 202 connected. And first solenoid valves 203 are installed in the middle of the first ventilation pipe 207 and the desorption inlet 202. Electromagnetic flow valves 204 are installed at the front ends of the first ventilation pipe 207 and the desorption inlet 202. And on one side of the front end of the electromagnetic flow valve 204, there is a second solenoid valve 205 connected. On the other side of the front end of the electromagnetic flow valve 204, there is a third solenoid valve 206 connected. The front end of the second solenoid valve 205 is connected to the first ventilation pipe 207. The diameter of the first ventilation pipe 207 is smaller than the diameter of the exhaust gas inlet 201, and the first solenoid valve 203, the second solenoid valve 205, the electromagnetic flow valve 204, and the third solenoid valve 206 are all controlled by a control cabinet based on existing principles, and this principle will not be elaborated in this case.

[0024] Above the front end of the first ventilation pipe 207, there is a first guide pipe 208 connected. And at the upper end of the first guide pipe 208, there is a lower air distribution pipe 209. On the surface of the lower air distribution pipe 209, there are first air outlets 210 opened. In the middle of the inner side of the first ventilation pipe 207, there is a rotating impeller 211 installed. The rotating impeller 211 is eccentrically arranged in the first ventilation pipe 207. And in the middle below the rotating impeller 211, there is a first synchronous pulley 212 arranged. On both sides above the front end of the first synchronous pulley 212, there are rotating sleeve shafts 213 connected. And at the upper end of the rotating sleeve shaft 213, there is a lower reciprocating lead screw 214 fixed. On one side of the surface of the lower reciprocating lead screw 214, there is a lower sliding block 215 arranged. The lower reciprocating lead screw 214 is arranged in a groove opened on the side wall of the purification box 101.

[0025] The exhaust gas inlet 201 and the desorption inlet 202 are connected to the electromagnetic flow valve 204 through the first solenoid valve 203. And the electromagnetic flow valve 204 is connected to the first ventilation pipe 207 through the second solenoid valve 205. The first ventilation pipe 207 is connected to the first air outlet 210 through the first guide pipe 208 and the lower air distribution pipe 209. And there are two groups of the first guide pipe 208, the lower air distribution pipe 209, and the first air outlet 210 arranged below the filling cavity 102.

[0026] The first synchronous pulley 212 is rotationally connected to the first ventilation pipe 207 through the rotating impeller 211, and the first synchronous pulley 212 is rotationally connected to the lower reciprocating lead screw 214 through the rotating sleeve shaft 213. The lower slider 215 is slidably connected to the purification box 101 through the lower reciprocating lead screw 214, and the lower reciprocating lead screw 214 and the lower slider 215 are fixedly arranged in two upper and lower groups. Two groups of the first synchronous pulleys 212 are arranged synchronously on the left and right, and are respectively connected to the rotating sleeve shafts 213 arranged in two groups on the left and right.

[0027] The waste gas inlet 201 is connected to the output end of the air collecting box after being pressurized by the adsorption fan. When waste gas is introduced into the waste gas inlet 201, the first solenoid valve 203 and the second solenoid valve 205 on the side of the waste gas inlet 201 are in the open state, while the first solenoid valve 203 on the side of the desorption inlet 202 is in the closed state, and at the same time the third solenoid valve 206 is also in the closed state. At this time, the waste gas will flow through the electromagnetic flow valve 204, the second solenoid valve 205 and the first ventilation pipe 207 and be introduced into the first guide pipe 208. The first guide pipe 208 is respectively communicated with the lower air distribution pipes 209 arranged in two upper and lower groups. At this time, the waste gas is distributed by the two upper and lower air distribution pipes 209 and finally ejected from the first air outlet 210. At the same time, the two upper and lower air distribution pipes 209 are respectively arranged below the lower two of the four equally divided filling cavities 102, so that the waste gas ejected from the first air outlet 210 passes through the activated carbon particles in the filling cavity 102 for adsorption treatment.

[0028] By rotating the impeller 211, when the waste gas is pressurized and introduced into the first ventilation pipe 207, the eccentrically arranged rotating impeller 211 will be impacted by the airflow and rotate. At this time, the rotating impeller 211 will transmit the rotational force to the first synchronous pulleys 212 arranged with belts on the left and right. The front rotating wheels of the first synchronous pulleys 212 will finally drive the rotating sleeve shafts 213 and the lower reciprocating lead screws 214 arranged in two groups on the left and right to rotate, so that the lower sliders 215 on the two groups of lower reciprocating lead screws 214 move back and forth up and down in the purification box 101, that is, inside the lower two of the four equally divided filling cavities 102. The lower slider 215 is fixedly connected to the side surface of the lower air distribution pipe 209, so that the lower air distribution pipe 209 will move back and forth up and down in the filling cavity 102 together with the lower slider 215.

[0029] Thus, when the two sets of lower air distribution pipes 209 move up and down in the filling cavity 102, the position of the first air outlet 210 will change dynamically in the activated carbon in the filling cavity 102, continuously disturbing the activated carbon layer, forcing the air flow to redistribute between different heights and regions, eliminating the air flow dead corners formed by static air distribution. Moreover, the up and down movement of the lower air distribution pipe 209 can reduce the residence time of the first air outlet 210 at a certain specific position, avoiding premature saturation of the activated carbon near the first air outlet 210 at the bottom layer. And when moving, it can push the activated carbon particles to tumble slightly, making the waste gas evenly distributed and mixed in the activated carbon, balancing the adsorption load. At the same time, when the air distribution pipe moves up and down, its rod body produces a mechanical scraping effect on the deposited dust, similar to the effect of snow sweeping, preventing dust from accumulating near the air inlet, greatly reducing the possibility of blockage. And the mechanical structure driven by the air flow does not require additional power, and only realizes the movement of the air distribution pipe through the kinetic energy of the waste gas, which can make full use of the waste gas energy, reduce the trouble of external power equipment and reduce the consumption of external energy. At the same time, when the first solenoid valve 203 on the side of the waste gas inlet 201 is closed and the first solenoid valve 203 on the side of the desorption inlet 202 is opened to introduce high-temperature nitrogen to desorb the activated carbon, the first air outlet 210 can finally perform dynamic nitrogen distribution desorption, and the achieved effect is the same as that of the dynamic adsorption of the waste gas.

[0030] In order to solve the technical problem that it is not convenient to adjust the adsorption and desorption areas according to the gas volume, resulting in an increase in the unnecessary travel of the waste gas and nitrogen desorption and thus prolonging the treatment time, as Figures 1-8 shown, the following preferred technical solutions are provided: Above one side of the air inlet mechanism 2 is connected with a gas distribution mechanism 3. The gas distribution mechanism 3 includes a second ventilation pipe 301 connected to the front end of the third solenoid valve 206. Above the front end of the second ventilation pipe 301 is connected with a second guide pipe 302. And above one side of the second guide pipe 302 is provided with an upper air distribution pipe 303. In the middle of the surface of the upper air distribution pipe 303 is provided with a second air outlet 304.

[0031] On one side of the gas distribution mechanism 3 is provided with a linkage mechanism 4. The linkage mechanism 4 includes a second synchronous pulley 401 arranged below the second ventilation pipe 301. Above the front end of the second synchronous pulley 401 is connected with a through shaft 402. And at the top of the through shaft 402 is fixed an upper reciprocating lead screw 403. On one side of the surface of the upper reciprocating lead screw 403 is provided with an upper sliding block 404.

[0032] The electromagnetic flow valve 204 is connected to the upper air distribution pipe 303 and the second air outlet 304 through the third solenoid valve 206, the second air pipe 301, and the second air guide pipe 302. The second synchronous pulley 401 is rotationally connected to the upper reciprocating screw rod 403 through the through shaft 402, and the upper slider 404 is slidably connected to the purification box 101 through the upper reciprocating screw rod 403. Through the air distribution mechanism 3 and the linkage mechanism 4, regional processing can be carried out according to the size of the air flow.

[0033] Through the electromagnetic flow valve 204, when it is recognized that the flow rate of the incoming gas is large, the second solenoid valve 205 can be opened, and the third solenoid valve 206 can be closed. At this time, the gas will finally be ejected from the first air outlet 210 on the lower air distribution pipes 209 arranged in the lower two groups for treatment, so that a relatively large amount of gas can pass through the entire filling cavity 102, enabling all the activated carbon in the filling cavity 102 to participate in the treatment, and enabling a large amount of gas to be fully treated. When the electromagnetic flow valve 204 recognizes that the flow rate of the incoming gas is small, the second solenoid valve 205 is closed, and the third solenoid valve 206 is opened. At this time, the gas will flow into the second air pipe 301, and the diameter of the second air pipe 301 is smaller than that of the first air pipe 207. Finally, the gas flows through the second air guide pipe 302 and is ejected from the second air outlet 304 under the distribution of the upper air distribution pipe 303.

[0034] The upper air distribution pipe 303 is set in a single group and is arranged in the third layer from bottom to top in the filling cavity 102 divided into four equal parts. At the same time, a rotating impeller 211 with the same principle as the first air pipe 207 is arranged in the second air pipe 301, and it can drive the second synchronous pulley 401 of the left and right double belts to rotate when the air flow passes through. The second synchronous pulley 401 can drive the left and right groups of through shafts 402 and the upper reciprocating screw rod 403 to rotate. The through shaft 402 penetrates the rotating sleeve shaft 213 and the lower reciprocating screw rod 214 and is connected to the upper reciprocating screw rod 403. When the upper reciprocating screw rod 403 rotates, the upper slider 404 can drive the fixedly connected upper air distribution pipe 303 to move up and down in the third layer of the filling cavity 102, finally realizing dynamic air distribution for small air flows. It is possible to dynamically select the first air outlet 210 or the second air outlet 304 for air outlet according to the size of the gas volume during gas treatment. In this way, when the gas flow rate is small and the demand for activated carbon to be adsorbed is small, the second air outlet 304 in the middle can avoid passing the gas through the activated carbon in the filling cavity 102 as a whole, thereby shortening the unnecessary treatment distance and being beneficial to improving the treatment efficiency of the device.

[0035] To solve the technical problems of volume changes in activated carbon due to moisture absorption or thermal expansion and avoid the blockage of the air distribution pipe, as Figure 1 、 Figure 2 and Figures 9-11 shown, the following preferred technical solutions are provided: In the middle of the inner side of the isolation layer plate 103, a compression mechanism 5 is provided. The compression mechanism 5 includes a compression cavity 501 provided on the inner side of the isolation layer plate 103. Below the interior of the compression cavity 501, a movable baffle 502 is provided, and a support spring 503 is connected to the upper surface of the movable baffle 502. At the top of the compression cavity 501, a ventilation mesh layer 504 is provided.

[0036] On both side surfaces of the air intake mechanism 2, a connection mechanism 6 is provided. The connection mechanism 6 includes sliding grooves 601 provided on both sides of the inner wall of the purification box 101. In the middle of the outer surface of the sliding groove 601, a wrapping sleeve 602 is provided, and a folding line 603 is provided in the middle of the surface of the wrapping sleeve 602.

[0037] The movable baffle 502 is elastically connected to the isolation layer plate 103 through the support spring 503, and the movable baffle 502 is communicated with the ventilation mesh layer 504 through the compression cavity 501. The sliding grooves 601 are respectively fixedly connected to the lower sliding block 215 and the upper sliding block 404, and the wrapping sleeve 602 and the folding line 603 are respectively slidably connected to the sliding groove 601 through the lower sliding block 215 and the upper sliding block 404. Through the compression mechanism 5 and the connection mechanism 6, the movement of the lower air distribution pipe 209 and the upper air distribution pipe 303 can be prevented from being jammed.

[0038] Through the mesh-shaped movable baffle 502, when the volume of the activated carbon changes due to moisture absorption or thermal expansion, the support spring 503 can be compressed upward, so that the movable baffle 502 can be extruded and moved in the compression cavity 501, providing extra space for the activated carbon to automatically adapt to the volume change of the activated carbon, thereby avoiding the lower air distribution pipe 209 and the upper air distribution pipe 303 from being jammed due to being squeezed and compacted by the activated carbon. Through the wrapping sleeve 602 wrapped outside the sliding groove 601 and outside the lower sliding block 215 and the upper sliding block 404, when the lower sliding block 215 and the upper sliding block 404 move up and down, the folding line 603 can be folded and unfolded, so as to seal the sliding groove 601, prevent the activated carbon from getting stuck in the sliding groove 601 and blocking the movement, and also help to avoid gas leakage.

[0039] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0040] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art will appreciate that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A solvent recovery device for packaging printing, comprising a working box (1) and an air inlet mechanism (2), characterized in that: The intake mechanism (2) for dynamic gas distribution is arranged below the interior of the working box (1). The intake mechanism (2) includes an exhaust gas inlet (201), a desorption inlet (202), a first solenoid valve (203), an electromagnetic flow valve (204), a second solenoid valve (205), a third solenoid valve (206), and a first ventilation pipe (207). The opposite side of the exhaust gas inlet (201) is connected to the desorption inlet (202), and a first solenoid valve (203) is installed in the middle of the first ventilation pipe (207) and the desorption inlet (202). An electromagnetic flow valve (204) is installed at the front end of the first ventilation pipe (207) and the desorption inlet (202), and a second solenoid valve (205) is connected to one side of the front end of the electromagnetic flow valve (204). A third solenoid valve (206) is connected to the other side of the front end of the electromagnetic flow valve (204). The front end of the second solenoid valve (205) is connected to the first ventilation pipe (207); Above the front end of the first ventilation pipe (207), a first air guide pipe (208) is connected. The upper end of the first air guide pipe (208) is provided with a lower air distribution pipe (209). The surface of the lower air distribution pipe (209) is provided with a first air outlet (210). A rotating impeller (211) is installed in the middle of the inner side of the first ventilation pipe (207), and a first synchronous pulley (212) is arranged in the middle below the rotating impeller (211). Above the front end of the first synchronous pulley (212), a rotating sleeve shaft (213) is connected, and an upper reciprocating lead screw (214) is fixed to the upper end of the rotating sleeve shaft (213). A lower sliding block (215) is arranged on one side of the surface of the upper reciprocating lead screw (214).

2. The solvent recovery device for packaging printing according to claim 1, characterized in that: The working box (1) includes a purification box (101), a filling cavity (102), an isolation layer board (103), and an exhaust port (104). The filling cavity (102) is arranged in the middle of the inner side of the purification box (101), and an isolation layer board (103) is installed inside the filling cavity (102). The exhaust port (104) is connected to the middle of the upper part of the purification box (101). Three groups of isolation layer boards (103) are equidistantly arranged in the filling cavity (102), and the isolation layer boards (103) divide the inside of the purification box (101) into four equal parts.

3. The solvent recovery device for packaging printing according to claim 2, wherein: The exhaust gas inlet (201) and the desorption inlet (202) are connected to the electromagnetic flow valve (204) through the first solenoid valve (203), and the electromagnetic flow valve (204) is connected to the first ventilation pipe (207) through the second solenoid valve (205). The first ventilation pipe (207) is connected to the first air outlet (210) through the first air guide pipe (208) and the lower air distribution pipe (209). Two groups of the first air guide pipe (208), the lower air distribution pipe (209), and the first air outlet (210) are arranged below the filling cavity (102).

4. The solvent recovery device for packaging printing according to claim 3, characterized in that: The first synchronous pulley (212) is rotationally connected to the first ventilation pipe (207) through the rotating impeller (211), and the first synchronous pulley (212) is rotationally connected to the lower reciprocating lead screw (214) through the rotating sleeve shaft (213). The lower sliding block (215) is slidably connected to the purification box (101) through the lower reciprocating lead screw (214), and the lower reciprocating lead screw (214) and the lower sliding block (215) are fixedly arranged in two upper and lower groups. Two groups of the first synchronous pulleys (212) are synchronously arranged on the left and right, and are respectively connected to the rotating sleeve shafts (213) arranged on the left and right.

5. The solvent recovery device for packaging printing according to claim 2, wherein: Above one side of the air inlet mechanism (2), a gas distribution mechanism (3) is connected. The gas distribution mechanism (3) includes a second ventilation pipe (301), a second guide pipe (302), an upper air distribution pipe (303) and a second air outlet (304). Above the front end of the second ventilation pipe (301), a second guide pipe (302) is connected. Above one side of the second guide pipe (302), an upper air distribution pipe (303) is arranged. In the middle of the surface of the upper air distribution pipe (303), a second air outlet (304) is arranged.

6. The solvent recovery device for packaging printing according to claim 5, wherein: On one side of the gas distribution mechanism (3), a linkage mechanism (4) for movement is arranged. The linkage mechanism (4) includes a second synchronous pulley (401), a through shaft (402), an upper reciprocating lead screw (403) and an upper sliding block (404). Above the front end of the second synchronous pulley (401), a through shaft (402) is connected. On the top of the through shaft (402), an upper reciprocating lead screw (403) is fixed. On one side of the surface of the upper reciprocating lead screw (403), an upper sliding block (404) is arranged.

7. A solvent recovery device for packaging printing according to claim 6, characterized in that: The electromagnetic flow valve (204) is communicated with the upper air distribution pipe (303) and the second air outlet (304) through the third solenoid valve (206), the second ventilation pipe (301) and the second guide pipe (302). The second synchronous pulley (401) is rotationally connected to the upper reciprocating lead screw (403) through the through shaft (402), and the upper sliding block (404) is slidably connected to the purification box (101) through the upper reciprocating lead screw (403).

8. The solvent recovery device for packaging printing according to claim 6, wherein: In the middle of the inner side of the isolation layer board (103), a compression mechanism (5) for expansion and buffering is arranged. The compression mechanism (5) includes a compression cavity (501), a movable baffle (502), a support spring (503) and a ventilation mesh layer (504). Below the inside of the compression cavity (501), a movable baffle (502) is arranged. On the upper surface of the movable baffle (502), a support spring (503) is connected. On the top of the compression cavity (501), a ventilation mesh layer (504) is arranged.

9. The solvent recovery device for packaging printing according to claim 8, characterized in that: On the two side surfaces of the air inlet mechanism (2), a connection mechanism (6) for preventing jamming is arranged. The connection mechanism (6) includes a sliding groove (601), a wrapping sleeve (602) and a folding line (603). In the middle of the outer surface of the sliding groove (601), a wrapping sleeve (602) is arranged. In the middle of the surface of the wrapping sleeve (602), a folding line (603) is arranged.

10. A solvent recovery device for packaging printing according to claim 9, characterized in that: The movable baffle (502) is elastically connected to the isolation layer plate (103) through a support spring (503), and the movable baffle (502) is communicated with the ventilation mesh layer (504) through a compression cavity (501). The sliding groove (601) is fixedly connected to the lower sliding block (215) and the upper sliding block (404) respectively, and the wrapping sleeve (602) and the folding line (603) are slidably connected to the sliding groove (601) through the lower sliding block (215) and the upper sliding block (404) respectively.

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