Waste gas treatment device for electroplating metal products

Abstract

The present invention discloses a waste gas treatment device for electroplated metal products, which belongs to the field of waste gas treatment technology, and includes a filter, a switch valve and a reactor connected in sequence. The valve pipe of the switch valve is a vertically arranged tubular structure, and the bottom end of the valve pipe is connected to the outlet end of the filter. A pair of slides fixed to each other as one are vertically slidably installed in the valve pipe. A plurality of spring sheets are arranged in the central ring at the bottom of the lower slide, and a plurality of air inlet holes are arranged around it. The air inlet holes are connected to the area between the two slides. A magnetic element with magnetism is arranged at the top closed end of the valve pipe, and a first gas transmission pipeline is connected to the side wall of the valve pipe between the magnetic element and the upper slide. When the pressure formed by the waste gas entering the valve pipe reaches a set range, the slide is pushed upward so that the upper slide contacts the closed end of the valve pipe. At this time, the upper slide is located above the air outlet. The present invention can automatically and centrally deliver waste gas to the reactor to avoid the reactor being open all the time.

Description

Technical Field

[0001] The present invention relates to the field of waste gas treatment equipment, in particular to a waste gas treatment device for electroplating metal products. Background Art

[0002] In the electroplating industry, a large amount of waste gas is generated when metal products are electroplated. These waste gases contain harmful substances such as heavy metal ions, organic solvents, and acidic gases, which pose a serious threat to the environment and human health. Therefore, it is particularly important to develop an efficient and stable electroplating waste gas treatment device. For the treatment of this type of gas, there are mainly two ways: chemical reaction and physical filtration. The prior art has developed a series of treatment equipment with a series of optional reaction reagents. For example, Chinese patents with publication numbers CN103263833A, CN103055683A, CN117861426A, CN213699424U and CN218871759U all record the current treatment schemes for waste gas generated by electroplating. In these treatment schemes, although they have good waste gas treatment capabilities, the equipment is single and only stays on the research of a certain link. The various links cannot be organically combined together, which is not enough to form an integrated complete treatment process. In particular, the equipment needs to be kept open, that is, when treating waste gas, the waste gas is continuously transported, and the corresponding series of equipment must be kept open accordingly. Even if there is only a little waste gas generated, it must be kept in normal working state, otherwise the waste gas cannot be treated and discharged normally. Although this is a good way to treat waste gas, it will cause great energy consumption and labor costs, because once the machine is turned on, someone must operate or monitor each device. Summary of the invention

[0003] 1. Technical issues to be resolved

[0004] In view of the shortcomings of the prior art, the present invention provides a waste gas treatment device for electroplated metal products. As one of the purposes of the present invention, the device can automatically open after the waste gas collects a set amount, avoiding the reactor from being constantly open or idling, saving energy consumption and labor costs.

[0005] (II) Technical solution

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an exhaust gas treatment device for electroplating metal products, comprising a filter, a switch valve and a reactor connected in sequence, the switch valve comprising a vertically arranged valve tube, the valve tube being a vertically arranged tubular structure, the bottom end of the valve tube being connected to the outlet end of the filter, a pair of slides fixed to each other as a whole being vertically slidably installed in the valve tube, wherein a plurality of spring sheets are arranged in a central ring around the bottom of the lower slide plate, a plurality of air inlet holes are arranged around the lower slide plate, the air inlet holes are connected to the area between the two slide plates, a magnetic element with magnetism is arranged at the top closed end of the valve tube, and a first gas pipeline connected to the reactor is connected to the side wall of the valve tube between the magnetic element and the upper slide plate through an air outlet; the bottom end of the spring sheet is elastically squeezed and contacted with the inner wall of the valve tube, so that the bottom end of the spring sheet is clamped in a clamping groove on the inner wall of the valve tube, and when the pressure formed by the exhaust gas entering the valve tube reaches a set range, the slide plate is pushed upward so that the upper slide plate contacts the closed end of the valve tube, and at this time, the upper slide plate is located above the air outlet.

[0007] Furthermore, the two slides are coaxially fixedly connected by a connecting column, and the bottom center of the lower slide has a diverter body with a cone tip facing downward, the spring sheet is an arc-shaped strip structure with a convex middle part, the top of the spring sheet is fixedly connected to the side wall of the diverter body, and the bottom end has a horizontally arranged extension section, and the extension section can slide into the groove along the radial direction of the valve tube, the groove width of the groove gradually decreases in the direction from the groove mouth to the groove bottom, and the upper side wall of the groove directly connected to the groove bottom has a horizontal limiting surface that can fit with the upper surface of the extension section.

[0008] Furthermore, the filter comprises an upper baffle plate and a lower bottom plate which are parallel and opposite to each other, a front side plate and a rear side plate which are symmetrically arranged front and back, and two sliding groove bodies which are oppositely arranged left and right; wherein the upper baffle plate and the lower bottom plate, together with the front side plate and the rear side plate, form a rectangular channel, the two sliding groove bodies are horizontally slidably installed in the rectangular channel, and the upper and lower ends and the front and rear sides of the sliding groove body are respectively in dynamic sealing sliding contact with the upper baffle plate and the lower bottom plate and the front side plate and the rear side plate; the two sliding groove bodies are in dynamic sealing sliding contact with the rectangular channel The filter chamber is surrounded by a filter groove, and a plurality of filter plates are stacked in a serpentine arrangement in the filter chamber. Two adjacent filter plates are hinged, and the bottom end of the lowest filter plate is placed on the lower bottom plate. The filter plate located at the upper part falls vertically downward from a plate storage bin, and a plurality of filter plates are coplanarly and vertically located in the plate storage bin. When the two sliding troughs move away from each other, the angle between the two adjacent filter plates in the filter chamber becomes smaller, and the filter plate in the plate storage bin continues to slide downward.

[0009] Furthermore, the filter is used for exhausting gas through an outlet, which is located on the side wall of the sliding trough body near one end of the plate storage bin, and the outlet is connected to the bottom end of the valve pipe through a second gas pipeline. The upper baffle is fixedly installed, and the bottom end of the sliding trough body is elastically connected to the guide plates on both sides of the lower bottom plate through a return spring. The plate storage bin is vertically located on the top of the upper baffle, and the upper baffle has a trumpet hole for the filter plate to fall vertically, and the large end of the trumpet hole faces downward. The top of the plate storage bin has an exhaust hole, which is connected to a recovery air pipe, and the recovery air pipe is connected to the bottom end of the valve pipe.

[0010] Furthermore, a pressure sensing element is provided in the closed end, and when the upper slide plate contacts the closed end, the pressure sensing element is squeezed, and the pressure sensor element controls the two sliding grooves to move away from or closer to each other according to the detected pressure value, and when the pressure value increases, the two sliding grooves move further away from each other.

[0011] Furthermore, the reactor includes a reaction vessel containing a reaction liquid, a rotating shaft is coaxially installed in the reaction vessel, a plurality of stirring rods are arranged on the rotating shaft, the shaft section of the rotating shaft close to the inner top wall of the reaction vessel and the stirring rod on the shaft section are both hollow structures, and the stirring rod of the hollow structure has a plurality of air distribution holes; an impeller is installed at one end of the rotating shaft exposed from the top of the reaction vessel, the impeller is located in a driving chamber at the top of the reaction vessel, the driving chamber is connected with a third air pipeline for connecting the switch valve and the reaction vessel, so that when the exhaust gas enters the driving chamber, the impeller and the rotating shaft are blown to rotate, and a fourth air pipeline is also connected to the side wall of the driving chamber opposite to the third air pipeline, and after the fourth air pipeline is extended into the reaction vessel, it is connected with a section of the rotating shaft close to the inner top wall of the reaction vessel in the form of a rotating seal.

[0012] Furthermore, an annular gas hood is fixed to the end of the fourth gas supply pipeline, and the gas hood is coaxially covered on the rotating shaft, and the rotating shaft can rotate in the gas hood. The exhaust gas in the gas hood can enter the hollow part of the rotating shaft through the air holes on the rotating shaft and be transmitted to the stirring rods that are also hollow structures.

[0013] Furthermore, one side of the air hood is provided with an arc-shaped flow channel, one end of which is connected to the fourth air pipeline, and the other end thereof is provided with an exhaust hole. A plurality of rectangular strip holes are provided on the rotating shaft inside the air hood, and all the rectangular strip holes are arranged in a circular array on the rotating shaft, so that the exhaust gas input into the arc-shaped flow channel by the fourth air pipeline can impact the rectangular ribs formed between two adjacent rectangular strip holes, thereby generating a driving force on the rotating shaft consistent with the direction of rotation of the impeller.

[0014] (III) Beneficial effects

[0015] The present invention provides an exhaust gas treatment device for electroplating metal products, which has the following beneficial effects: the exhaust gas can be concentrated and put into the reactor for reaction only when it gathers to a certain extent, avoiding the reactor being always open and wasting power. Moreover, the exhaust gas can be output to the reaction vessel only when it is within the set pressure range, which defaults to a basic reference value for leaving enough corresponding reactants in the reactor.

[0016] The switch valve in the present invention is different from the general control valve on the market. It has a simpler structure and mainly relies on the synergistic effect of the pressure generated by the accumulation of magnetic elements and the exhaust gas itself. After being automatically opened, it can be automatically closed.

[0017] In addition, it has automatic and flexible filtering performance, which can well match the exhaust gas volume and perform effective filtration. Once the filtered exhaust gas enters the reactor, it immediately triggers the stirring operation of the internal stirring rod, with a high degree of automation and energy saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A structural schematic diagram of the present invention;

[0019] Figure 2 A structural diagram of a switch valve;

[0020] Figure 3 A structural diagram of a filter;

[0021] Figure 4 for Figure 3 Schematic diagram of AA in the middle;

[0022] Figure 5 A structural diagram of a reactor;

[0023] Figure 6 for Figure 5 The enlarged view of F in FIG.

[0024] Figure 7 A cross-sectional schematic diagram of another structure of a gas delivery hood;

[0025] Figure 8 for Figure 7 NN cross-sectional view in.

[0026] In the figure: filter 1, sliding trough body 101, upper baffle 102, lower bottom plate 103, rear side plate 104, guide plate 105, return spring 106, exhaust gas input pipeline 107, air filter plate 108, plate storage bin 109, switch valve 2, valve pipe 201, upper slide plate 202, lower slide plate 203, connecting column 204, spring sheet 205, card slot 206, horizontal limit surface 20601, extension section 207, flow divider 208, closed end 210, pressure sensing element 211, reactor 3, reaction vessel 301, rotating shaft 302, stirring rod 303, impeller 304, air distribution hole 305, motor 306, telescopic shaft 307, air supply cover 308, air vent 309, rectangular rib 310, arc flow channel 311, exhaust hole 312, second air supply pipeline 4, third air supply pipeline 5, fourth air supply pipeline 6. DETAILED DESCRIPTION

[0027] This specification will clearly and completely express the technical solutions in the following examples based on the drawings of the embodiments of the present invention. The implementation methods described in this specification are only some of the embodiments of the present invention, not all of them. All other embodiments extended and inspired by those skilled in the art based on these embodiments in this application without creative work should fall within the scope of protection of the present invention.

[0028] As one of the embodiments of the present invention, a waste gas treatment device for electroplating metal products is described in detail, and its structure mainly includes the following components: Figure 1 The filter 1, the switch valve 2 and the reactor 3 are connected in sequence. The filter 1 is used to separate impurities such as smoke particles in the exhaust gas to achieve preliminary purification and filtration, and the switch valve 2 is used to control whether the exhaust gas is sent to the reactor 3 for treatment. As for the reactor 3, it is a container for mixing and reacting with the reaction liquid. Specifically, Figure 2 As shown, the switch valve 2 mainly includes a vertically arranged valve tube 201, which can be a circular tube, that is, the valve tube 201 is a vertically arranged tubular structure. When installed, the bottom end of the valve tube 201 is connected to the outlet end of the filter 1 to receive the filtered exhaust gas. In addition, a pair of slides fixed to each other are vertically slidably installed in the valve tube 201, and the two slides are arranged at intervals. A plurality of spring sheets 205 are arranged around the bottom center of the lower slide 203 of one of the two slides. A plurality of air inlet holes (not shown in the figure) are arranged around the upper part of the lower slide 203 for the exhaust gas to enter. The air inlet holes are connected to the area between the two slides. A magnetic element with magnetism is arranged at the top closed end 210 of the valve tube 201, which can be an electromagnet, etc. The side wall of the valve tube 201 between the magnetic element and the upper slide 202 can be connected to the first gas pipeline through an outlet, and the first gas pipeline can be fixed to the top of the reactor 3.

[0029] like Figure 2 As shown, the bottom end of the spring sheet 205 is in elastic squeeze contact with the inner wall of the valve tube 201, so that the bottom end of the spring sheet 205 is clamped in the clamping groove 206 on the inner wall of the valve tube 201, that is, it is clamped in the clamping groove 206 by elastic force, and when the pressure formed by the exhaust gas entering the valve tube 201 reaches the set range, the slide plate is pushed upward under the impact of the exhaust gas, so that the upper slide plate 202 is in contact with the closed end 210 of the valve tube 201, that is, the whole formed by the two slide plates is pushed to the limit. At this time, the upper slide plate 202 is located above the air outlet, so that the exhaust gas can be continuously output from the air outlet, and then flow into the reaction dish 301 for reaction. In the specific production, the two slide plates are coaxially fixedly connected by a connecting column 204 to form an integrated structure, and the bottom center of the lower slide plate 203 has a diverter 208 with a cone tip facing downward, so that the exhaust gas can flow upward through the above-mentioned air inlet hole. As one of the specific structures, Figure 2 The spring sheet 205 is an arc-shaped strip structure with a raised middle part. The top of the spring sheet 205 is fixed to the side wall of the flow divider 208, and the bottom has a horizontally arranged extension section 207. The extension section 207 can slide into the slot 206 along the radial direction of the valve tube 201, and then be stuck in the slot 206. More specifically, the slot width of the slot 206 is gradually reduced from the slot opening to the slot bottom, so that the extension section 207 can be stuck in, and the upper side wall of the slot 206 directly connected to its slot bottom also has a horizontal limit surface 20601 that can fit with the upper surface of the extension section 207, so as to prevent the spring sheet 205 from being easily impacted and moved upward, thereby improving the exhaust gas gathering force.

[0030] like Figure 3-4As shown, as one of the implementation details, the filter 1 includes an upper baffle 102 and a lower bottom plate 103 that are parallel and opposite to each other, a front side plate and a rear side plate 104 that are symmetrically arranged front and back, and two sliding grooves 101 that are arranged left and right. In fact, it is similar to these six elements forming the six sides of a rectangle. Specifically, the upper baffle 102 and the lower bottom plate 103 mentioned above should be together with the front side plate and the rear side plate 104 to form a rectangular channel, and the two ends of the rectangular channel are open. Correspondingly, the two sliding grooves 101 are installed in the rectangular channel in a horizontal sliding manner and can move horizontally, and the upper and lower ends and the front and rear sides of the sliding groove 101 are respectively in dynamic sealing sliding contact with the upper baffle 102 and the lower bottom plate 103 and the front side plate and the rear side plate 104, so that when the two sliding grooves 101 slide horizontally, they form a filter cavity, that is, the two sliding grooves 101 and the rectangular channel form a filter cavity. In addition, a number of air filter plates 108 are stacked in a serpentine arrangement in the filter cavity. These air filter plates 108 mainly filter impurities, floating dust or particles in the exhaust gas. Specifically, they can be all filtering and purification materials or components that can be used in the prior art. They can not only filter, but also have adsorption and other properties. During production, two adjacent air filter plates 108 are hinged, and only when necessary, a roller can be installed at the intersection, so that the hinged end of the air filter plate 108 can slide more smoothly relative to the cavity wall of the above-mentioned filter cavity. Specifically, the bottom end of the bottommost filter plate 108 is placed on the lower bottom plate 103, and the filter plate 108 located at the upper part falls vertically downward from a plate storage bin 109, and there are still a number of filter plates 108 coplanarly and vertically located in the plate storage bin 109. During operation, if the two sliding slots 101 are away from each other, the angle between the two adjacent filter plates 108 located in the filter chamber becomes smaller, that is, naturally, these numerically stacked filter plates 108 are further drawn together, or compressed and close, so that the filter plates 108 located in the plate storage bin 109 continue to slide downward, increasing the number of filter plates 108 in the filter chamber. In addition, the gas outlet of the filter 1 is located on the side wall of the sliding slot 101 at one end of the plate storage bin 109, and the gas outlet is connected to the bottom end of the valve pipe 201 through the second gas pipeline 4 to output the filtered gas.

[0031] In the specific manufacturing process, the upper baffle 102 is fixedly installed, and the bottom end of the sliding groove body 101 is elastically connected to the guide plates 105 on both sides of the lower bottom plate 103 through the return spring 106, so that after the exhaust gas treatment is completed, or the exhaust gas is reduced and the pressure is reduced, the two sliding groove bodies 101 quickly move together or reset. In order to facilitate the air filter plates 108 to move closer to each other, the air filter plates 108 in the plate storage bin 109 fall freely, such as Figure 3The container 109 is vertically located on the top of the upper baffle 102, and the upper baffle 102 has a trumpet hole for the filter plate 108 to fall vertically, with the large end of the trumpet hole facing downward, so that when necessary, the two sliding troughs 101 can be brought closer to each other to press the upper part of the filter plate 108 back into the container 109. As an optional design structure, the top of the container 109 has an exhaust hole 312, which is connected to the recovery air pipe, and the recovery air pipe is connected to the bottom end of the valve pipe 201 to avoid the accumulation of occasional leaked exhaust gas.

[0032] As an implementation structure, such as Figure 2 A pressure sensing element 211 is provided in the closed end 210 at the top of the valve tube 201. When the upper slide plate 202 contacts the closed end 210, the pressure sensing element 211 is squeezed, and the pressure sensor element controls the two sliding grooves 101 to move away from or closer to each other according to the detected pressure value, and when the pressure value increases, the two sliding grooves 101 move further away from each other, and the arrangement of the air filter plate 108 is flexibly and actively adjusted.

[0033] like Figure 5 As shown, the reactor 3 includes a reaction vessel 301 containing a reaction liquid, a rotating shaft 302 is coaxially installed in the reaction vessel 301, and a plurality of stirring rods 303 are provided on the rotating shaft 302 for stirring and mixing the reaction liquid, so that the waste gas and the reaction liquid can fully react with each other and the treatment performance can be improved; at the same time, the shaft section of the rotating shaft 302 close to the inner top wall of the reaction vessel 301 and the stirring rod 303 on the shaft section are both hollow structures, and the stirring rod 303 with a hollow structure has a plurality of air distribution holes 305, so that the waste gas is discharged from the stirring rod 303 above the reaction liquid surface, and then enters the reaction liquid to contact and react with the stirred reaction liquid.

[0034] like Figure 5 As shown, the end of the rotating shaft 302 exposed from the top of the reaction vessel 301 is equipped with an impeller 304, and the impeller 304 is located in the driving chamber at the top of the reaction vessel 301. The driving chamber is connected to the third gas pipeline 5 for connecting the switch valve 2 and the reaction vessel 301, so that when the exhaust gas enters the driving chamber, the impeller 304 and the rotating shaft 302 are directly blown to rotate, so that the stirring rod 303 stirs the reaction liquid, so that as long as the exhaust gas enters, the reaction liquid is automatically stirred, instead of being opened all the time as in the traditional technology, wasting energy consumption, or being opened manually, which is more troublesome. A fourth gas pipeline 6 is also connected to the side wall of the driving chamber opposite to the third gas pipeline 5. After the fourth gas pipeline 6 extends into the reaction vessel 301, it must be connected to a section of the shaft of the rotating shaft 302 close to the inner top wall of the reaction vessel 301 in the form of a rotating seal, so as to realize the input of the exhaust gas into the reaction vessel 301.

[0035] Specifically, if Figure 6At the end of the fourth gas pipeline 6, a ring-shaped gas hood 308 is fixed. This gas hood 308 coaxially covers the rotating shaft 302, and the contact between the two is a dynamic seal, that is, the rotating shaft 302 can rotate in the gas hood 308, and the exhaust gas in the gas hood 308 can enter the hollow part of the rotating shaft 302 through the air holes 309 on the rotating shaft 302, and then be transmitted to the stirring rods 303 of the same hollow structure, and evenly sprayed in the reaction vessel 301, so as to avoid the exhaust gas from being concentrated and diffused too slowly after entering the reaction vessel 301. In fact, under the premise of sufficient pressure, a one-way valve can be installed on each gas distribution hole 305, so that these stirring rods 303 with one-way valves are immersed in the reaction liquid and directly contact the reaction liquid, or similar to some aeration devices in the prior art.

[0036] In addition to the above structure, it can also be Figure 7-8 As shown, the inside of the gas hood 308 is not an annular groove, but an arc flow channel 311 is provided on one side of the gas hood 308. One end of the arc flow channel 311 is connected to the fourth gas pipeline 6, and the other end thereof has an exhaust hole 312. The rotating shaft 302 located in the gas hood 308 has a plurality of rectangular strip holes, and all the rectangular strip holes are arranged in an annular array on the rotating shaft 302. The main purpose is to make the rectangular ribs 310 formed between two adjacent rectangular strip holes, and the rectangular ribs 310 are equivalent to the blades of the impeller 304. The exhaust gas input into the arc flow channel 311 by the fourth gas pipeline 6 can impact the rectangular ribs 310, thereby generating a driving force on the rotating shaft 302 that is consistent with the direction of the impeller 304, which is equivalent to the exhaust gas performing a secondary drive on the rotating shaft 302. This is also to better fit the function of the above-mentioned switch valve 2 to adjust the pressure of the exhaust gas before entering the reaction vessel 301, so that the exhaust gas treatment can be started only when the exhaust gas accumulated in the metal electroplating pool is sufficient.

[0037] In the above structural design, if the amount of waste gas to be processed is very small, due to the low pressure, the drive of the rotating shaft 302 is limited. Figure 5 As shown, an additional motor 306 is provided, and the main shaft of the motor 306 is fixedly connected to a telescopic shaft 307. When the telescopic shaft 307 is extended, it is inserted into the shaft end of the impeller 304, and then the rotating shaft 302 can be actively driven, and the rotation speed can be artificially changed.

[0038] When the exhaust gas treatment device in this embodiment is working, as one of the working states, the exhaust gas first enters the filter cavity formed by the two sliding troughs 101 through the exhaust gas input pipe 107, and is filtered through the layers of filter plates 108. Finally, the exhaust gas is output from the corresponding gas pipeline to the switch valve 2. When in use, a one-way valve (not shown in the figure) can be installed on the exhaust gas input pipe 107 and the second gas pipeline 4 to prevent the exhaust gas from flowing back into the electroplating pool or the pipe connected to the top of the electroplating pool, or flowing back into the filter 1. If necessary, a buffer tank can be installed on the second gas pipeline 4 to temporarily store the filtered exhaust gas. When the exhaust gas accumulates enough, All the spring sheets 205 are squeezed and brought close to each other, which will push the slide plate upward, and the exhaust gas can be discharged from the third gas pipeline 5. Due to the presence of the magnetic element, once the spring sheet 205 slides out of the slot 206, it will be fixed at the bottom of the closed end 210 under the cooperation of the impact force of the magnetic element and the exhaust gas. When the exhaust gas is output to a sufficient amount, the pressure in the filter 1 decreases, and the attraction of the magnetic element cannot fix the overall structure formed by the two slide plates alone, so that the overall structure slides down under its own weight, and the spring sheet 205 re-enters the slot 206 and is fixed, waiting for the next exhaust gas to gather to the set pressure and move up again.

[0039] For the filter 1, since the device adopts stacked serpentine hinged air filter plates 108, it can push the two sliding trough bodies 101 away from each other when the exhaust gas flow increases and the pressure below the two sliding trough bodies 101 increases, and then the air filter plates 108 gradually fall down, thereby increasing the number of air filter plates 108 in the filter cavity, that is, increasing the number of filter layers to adapt to the entry of large flow and high flow rate exhaust gas. Because, in practice, there may be a pump above the electrolytic cell to actively suck away the generated exhaust gas, which is also a practical situation of the change in exhaust gas flow. Correspondingly, the present design increases the number of filter layers to adapt to this change. Of course, in practice, the two sliding trough bodies 101 can be actively brought closer or apart to change the filtering performance. These can be flexibly selected based on actual conditions. The present invention does not strictly limit it, but only clarifies the basic structure. In addition, in the above embodiments, the linkage between the pressure sensor element 211 and the sliding slot body 101 can flexibly adjust the number of filter layers. When the exhaust gas increases, the pressure increases and the flow rate increases due to the aggregation effect, and the exhaust gas fails to pass through the filter plate 108 for filtering normally. Or, without opening the distance between the two sliding slot bodies 101, all the filter plates 108 are directly forced to move up, which affects the filtering and purification capacity.

[0040] After the exhaust gas enters the reaction vessel 301, it impacts the impeller 304, actively driving the rotating shaft 302 to stir the reaction liquid with the stirring rod 303, so that the exhaust gas and the reaction liquid are better mixed, forming a linkage mechanism in which the exhaust gas is automatically input and the stirring rod 303 is synchronously started, which is efficient and energy-saving.

[0041] It should be explained here that, in this specification, terms such as first and second are only used to distinguish one feature from another, and do not mean that there is a certain relationship or order between these technical features. The terms "including" and "comprising" refer to the inclusion of one or some technical means or features, specifically meaning that there are other existing or non-existing technical features that have not been included. The discussion in the above embodiments is only a representative example for the present invention, and is by no means the only restrictive constraint feature. A person of ordinary skill in the art should understand that, without departing from the technical content recorded in all the claims of this application, some simple substitutions and modifications can be made, thereby changing or becoming equivalent to other specific embodiments and application scenarios. However, no matter how the adaptability is changed, these embodiments will inevitably fall within the scope of protection of the present invention.

Claims

1. A waste gas treatment device for electroplating metal products, comprising a filter (1), a switch valve (2) and a reactor (3) connected in sequence, wherein the filter (1) is used to separate impurities in the waste gas, and is characterized in that: The switch valve (2) comprises a vertically arranged valve tube (201), the valve tube (201) being a vertically arranged tubular structure, the bottom end of the valve tube (201) being connected to the outlet end of the filter (1), a pair of slides fixedly connected to each other are vertically slidably installed in the valve tube (201), wherein a plurality of spring sheets (205) are arranged in a central ring at the bottom of the lower slide (203), and a plurality of air inlet holes are arranged around the ring, the air inlet holes are connected to the area between the two slides, a magnetic element with magnetism is arranged at the top closed end (210) of the valve tube (201), and a first air pipeline connected to the reactor (3) is connected to the side wall of the valve tube (201) between the magnetic element and the upper slide (202) through the air outlet; The bottom end of the spring sheet (205) is elastically pressed into contact with the inner wall of the valve tube (201), so that the bottom end of the spring sheet (205) is clamped in the clamping groove (206) on the inner wall of the valve tube (201), and when the pressure of the exhaust gas entering the valve tube (201) reaches a set range, the slide plate is pushed upward so that the upper slide plate (202) is in contact with the closed end (210) of the valve tube (201), and at this time, the upper slide plate (202) is located above the gas outlet; The reactor (3) comprises a reaction vessel (301) containing a reaction liquid, a rotating shaft (302) is coaxially installed in the reaction vessel (301), a plurality of stirring rods (303) are arranged on the rotating shaft (302), the shaft section of the rotating shaft (302) close to the inner top wall of the reaction vessel (301) and the stirring rods (303) on the shaft section are both hollow structures, and the stirring rods (303) of the hollow structure are provided with a plurality of air distribution holes (305); an impeller (304) is installed at one end of the rotating shaft (302) exposed from the top of the reaction vessel (301), and the impeller (304) is provided with a plurality of air distribution holes (305); 04) is located in a driving chamber at the top of the reaction vessel (301), the driving chamber is connected to a third gas pipeline (5) used to connect the switch valve (2) and the reaction vessel (301), so that when the exhaust gas enters the driving chamber, it blows the impeller (304) and the rotating shaft (302) to rotate, and a fourth gas pipeline (6) is also connected to the side wall of the driving chamber opposite to the third gas pipeline (5). After the fourth gas pipeline (6) extends into the reaction vessel (301), it is connected to a section of the rotating shaft (302) close to the inner top wall of the reaction vessel (301) in the form of a rotating seal; An annular gas delivery hood (308) is fixed to the end of the fourth gas delivery pipeline (6), and the gas delivery hood (308) is coaxially covered on the rotating shaft (302). The rotating shaft (302) can rotate in the gas delivery hood (308), and the exhaust gas in the gas delivery hood (308) can enter the hollow part of the rotating shaft (302) through the air holes (309) on the rotating shaft (302) and be transmitted to the stirring rods (303) which are also hollow structures; The gas delivery hood (308) has an arc-shaped flow channel (311) on one side, one end of the arc-shaped flow channel (311) is connected to the fourth gas delivery pipeline (6), and the other end thereof has an exhaust hole (312). The rotating shaft (302) located in the gas delivery hood (308) has a plurality of rectangular strip holes, and all the rectangular strip holes are arranged in a circular array on the rotating shaft (302), so that the exhaust gas input into the arc-shaped flow channel (311) from the fourth gas delivery pipeline (6) can impact the rectangular ribs (310) formed between two adjacent rectangular strip holes, thereby generating a driving force on the rotating shaft (302) that is consistent with the direction of rotation of the impeller (304).

2. The waste gas treatment device for electroplating metal products according to claim 1, characterized in that: The two slides are coaxially fixedly connected via a connecting column (204); the bottom center of the lower slide (203) is provided with a diverter body (208) with a cone tip facing downward; the spring sheet (205) is in the form of an arc-shaped strip structure with a raised middle portion; the top end of the spring sheet (205) is fixedly connected to the side wall of the diverter body (208); the bottom end is provided with a horizontally arranged extension section (207); the extension section (207) can slide into the groove (206) along the radial direction of the valve tube (201); the groove width of the groove (206) is gradually reduced in the direction from the groove opening to the groove bottom; and the upper side wall of the groove (206) directly connected to its groove bottom is provided with a horizontal limiting surface (20601) that can fit with the upper surface of the extension section (207).

3. The waste gas treatment device for electroplating metal products according to claim 1, characterized in that: The filter (1) comprises an upper baffle (102) and a lower bottom plate (103) which are parallel and opposite to each other, a front side plate and a rear side plate (104) which are symmetrically arranged front and back, and two sliding grooves (101) which are oppositely arranged left and right; wherein: The upper baffle plate (102) and the lower bottom plate (103) together with the front side plate and the rear side plate (104) form a rectangular channel, and the two sliding groove bodies (101) are installed in the rectangular channel in a horizontal sliding manner, and the upper and lower ends and the front and rear sides of the sliding groove body (101) are in dynamic sealing sliding contact with the upper baffle plate (102) and the lower bottom plate (103) and the front side plate and the rear side plate (104) respectively; The two sliding trough bodies (101) and the rectangular channel form a filter cavity, and a plurality of air filter plates (108) are stacked in a serpentine arrangement in the filter cavity. Two adjacent air filter plates (108) are hinged, and the bottom end of the lowest air filter plate (108) is placed on the lower bottom plate (103). The air filter plate (108) located at the upper part falls vertically downward from a plate storage bin (109), and a plurality of air filter plates (108) are coplanarly and vertically located in the plate storage bin (109). When the two sliding trough bodies (101) move away from each other, the angle between the two adjacent air filter plates (108) located in the filter cavity becomes smaller, and the air filter plates (108) located in the plate storage bin (109) continue to slide downward.

4. The waste gas treatment device for electroplating metal products according to claim 3, characterized in that: The filter (1) is used for discharging gas through an outlet, which is located on the side wall of the sliding trough (101) at one end close to the plate storage bin (109), and the outlet is connected to the bottom end of the valve pipe (201) through a second gas pipeline (4).

5. The waste gas treatment device for electroplating metal products according to claim 3, characterized in that: The upper baffle plate (102) is fixedly installed, and the bottom end of the sliding groove body (101) is elastically connected to the guide plates (105) on both sides of the lower bottom plate (103) through a return spring (106). The plate storage bin (109) is vertically located on the top of the upper baffle plate (102), and the upper baffle plate (102) has a drop-out hole for the air filter plate (108) to drop vertically, which is a trumpet hole, and the large end of the trumpet hole faces downward.

6. The waste gas treatment device for electroplating metal products according to claim 3, characterized in that: The top end of the plate storage bin (109) is provided with an exhaust hole (312), the exhaust hole (312) is connected to a recovery air pipe, and the recovery air pipe is connected to the bottom end of the valve pipe (201).

7. The waste gas treatment device for electroplating metal products according to claim 3, characterized in that: A pressure sensing element (211) is provided in the closed end (210); when the upper slide plate (202) contacts the closed end (210), the pressure sensing element (211) is pressed; and the pressure sensing element controls a controller to control the two sliding groove bodies (101) to move away from or closer to each other according to the detected pressure value; and when the pressure value increases, the two sliding groove bodies (101) move further away from each other.

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