A high-efficiency and low-consumption waste gas purification system applied to industrial production

Abstract

The application discloses a kind of high-efficiency low-consumption purification system of waste gas applied to industrial production, it is related to industrial waste gas purification technical field, including spray tower, bag filter, heat exchanger, be connected in spray tower, bag filter and the gas inlet pipeline between heat exchanger, install in the gas inlet pipeline one end gas-collecting hood, install in the top of spray tower gas outlet pipeline, install in the fan bottom of gas outlet pipeline and install in the chimney of fan air outlet, the upper grid plate is installed in the inside of spray tower.The application can achieve the potential energy of washing liquid flowing into water storage cavity is converted into kinetic energy and is transmitted to generator to generate electricity by setting water collecting hopper, impeller and generator, the converted electric energy is used for electrical equipment inside spray tower, reduce the power consumption of spray tower circulating pump and fan;By setting water collecting hopper and liquid level sensor, the effect of monitoring the liquid overflow phenomenon inside spray tower can be realized.

Description

Technical Field

[0001] This invention relates to the field of industrial waste gas purification technology, specifically to a high-efficiency, low-consumption waste gas purification system applied to industrial production. Background Technology

[0002] Industrial waste gas refers to various harmful gases and particulate matter generated during industrial production. If these waste gases are discharged directly into the atmosphere without treatment, they will cause serious pollution to the environment and affect human health and ecological balance. Therefore, industrial waste gas is usually purified by a purification system before being discharged. At present, industrial waste gas purification systems usually consist of waste gas pipelines, gas collection hoods, heat exchangers, bag filters, spray towers, fans, and chimneys. The waste gas in the factory is collected by the gas collection hoods and transported in the waste gas pipelines. After being cooled by the heat exchanger and having large particles removed by the bag filter, the waste gas enters the spray tower for purification and is then discharged from the chimney.

[0003] In existing industrial waste gas purification systems, the spray towers require continuous operation of the fan and the circulating pump for spraying during the waste gas purification process, which consumes electricity. In addition, since the packing material in the spray tower falls directly onto the grid plate, the washing liquid must pass through the packing material and the grid plate to flow downwards. Once the bottom packing material blocks the grid channel, the washing liquid will accumulate in the packing layer. When it encounters resistance from the rising waste gas, it is even more difficult to flow downwards, resulting in the washing liquid overflowing from the packing layer, which is called flooding. Existing spray towers do not have automatic monitoring and maintenance functions for flooding, which is not conducive to the efficient purification of waste gas by the spray tower. Summary of the Invention

[0004] The purpose of this invention is to provide a high-efficiency and low-consumption purification system for waste gas in industrial production, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a high-efficiency, low-consumption waste gas purification system for industrial production, comprising a spray tower, a bag filter, a heat exchanger, an inlet pipe connecting the spray tower, the bag filter, and the heat exchanger, a gas collection hood installed at one end of the inlet pipe, an outlet pipe installed at the top of the spray tower, a fan installed at the bottom of the outlet pipe, and a chimney installed at the fan outlet. An upper grid plate is installed inside the spray tower, and a lower grid plate is installed below the upper grid plate. Both the upper and lower grating plates are provided with a packing layer on their upper and lower surfaces. A demister is installed at the top of the inner cavity of the spray tower. A connecting plate connects the upper and lower grating plates. An upper grid plate is installed on the inner wall of the spray tower below the upper grating plate, and a lower grid plate is installed on the inner wall of the spray tower below the lower grating plate. Pins are installed on the upper and lower surfaces of both the upper and lower grid plates. A lifting drive assembly is installed inside the spray tower below the lower grid plate, and a water collection hopper is installed on the inner wall of the spray tower below the lifting drive assembly.

[0006] Preferably, the connecting plate has a sliding groove inside, and a sliding rail is slidably connected inside the sliding groove. The sliding rail is installed on the inner wall of the spray tower. The connecting plate is arc-shaped and contacts the inner wall of the spray tower. The upper grid plate and the lower grid plate are slidably connected to the spray tower through the connecting plate.

[0007] Preferably, both the upper and lower grid plates are grid-shaped. The upper grid plate has a groove on one side for the connecting plate to pass through, and the lower grid plate has grooves on both sides for the fixing plate to pass through. The number of ejector pins is several. The position of the ejector pins on the upper grid plate corresponds to the position of the grid groove in the upper grid plate, and the position of the ejector pins on the lower grid plate corresponds to the position of the grid groove in the lower grid plate.

[0008] Preferably, a fixing plate is connected to both sides of the lower surface of the lower grille plate. The fixing plate has a groove in the middle to form an inverted U-shape. A toothed rack is installed on the inner wall of one side of the fixing plate. There are two fixing plates, which are symmetrically arranged relative to the lower grille plate.

[0009] Preferably, the lifting drive assembly includes a central shaft that runs through the spray tower, with first bearings installed at both ends of the central shaft and between the central shaft and the spray tower. Gears are installed on the outer sides of the central shaft below the two fixed plates. One end of the central shaft extends from the side wall of the spray tower and is connected to a drive motor.

[0010] Preferably, the central shaft is rotatably connected to the spray tower via a first bearing, the two gears rotate synchronously via the central shaft, the two gears are respectively inserted into the grooves of the two fixed plates, and the gears mesh with the rack.

[0011] Preferably, the bottom of the water collecting hopper is provided with a drain outlet, and mounting brackets are connected to the lower surfaces of the water collecting hopper on both sides of the drain outlet. A rotating shaft is provided through the two mounting brackets. An impeller is installed on the outside of the rotating shaft between the two mounting brackets. Second bearings are installed at both ends of the rotating shaft between a mounting bracket and the side wall of the spray tower, respectively. One end of the rotating shaft extends from the side wall of the spray tower and is connected to a generator. The inner cavity of the water collecting hopper is connected to the inner cavity of the spray tower to form a water collecting chamber. A liquid level sensor is installed inside the water collecting chamber.

[0012] Preferably, the drain outlet corresponds to the position of the impeller, the impeller is rotatably connected to the mounting frame via a rotating shaft, an air inlet valve is installed near the spray pipe, the air inlet pipe passes through the side wall of the spray tower and is connected to the water collection hopper, and the inner cavity of the air inlet pipe is connected to the water collection chamber.

[0013] Preferably, a spraying assembly is installed inside the spraying towers above the two packing layers. The spraying assembly includes a circulating pump installed on the upper surface of the circulating water tank. The outlet of the circulating pump is connected to a water pipe. Two spray pipes are connected to the top of the water pipe. Spray nozzles are installed at the bottom of the spray pipes. A water inlet valve is installed at the connection between the two spray pipes and the water pipe.

[0014] Preferably, a water storage chamber is provided inside the spray tower below the water collection hopper. A circulating water tank is connected to one side of the spray tower, and a filter screen is installed between the circulating water tank and the spray tower. A control box is installed on the other side of the spray tower. A processor is installed inside the control box, and a battery is installed inside the control box on one side of the processor. The battery is electrically connected to a generator through a circuit, and the liquid level sensor is electrically connected to the input terminal of the processor through a circuit.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. This high-efficiency, low-consumption waste gas purification system for industrial production utilizes a water collection hopper, impeller, and generator. The water collection hopper, installed at the bottom of the packing layer, allows the washing liquid sprayed from the spray pipes to fully contact the waste gas before passing through the packing layer and falling into the water collection chamber. The water collection hopper gathers the washing liquid, causing it to flow downwards from the drain outlet. The water flowing from the drain outlet falls onto the impeller, pushing it to rotate around the shaft. The impeller's rotation drives the shaft, which in turn rotates the generator's rotor, generating electricity to power the electrical equipment inside the spray tower. This system utilizes the potential energy of the washing liquid flowing into the storage chamber to generate electricity, reducing the power consumption of the spray tower's circulating pump and fan.

[0017] 2. This high-efficiency, low-consumption waste gas purification system for industrial production uses a water collection hopper and a level sensor. The inner cavity of the water collection hopper is connected to the inner cavity of the spray tower to form a water collection chamber. When the washing liquid continuously sprays the waste gas, it flows into the water collection chamber continuously. Therefore, the water level of the washing liquid collected in the water collection chamber is in dynamic equilibrium. The level sensor monitors the water level data in the water collection chamber in real time and transmits the data to the processor. When the packing layer is blocked and flooding occurs, the washing liquid sprayed from the spray pipe has difficulty flowing downward, and the water level in the water collection chamber is lower than the normal range. At this time, the level sensor transmits an abnormal signal to the processor, and the processor outputs a signal to remind the staff that flooding has occurred in the spray tower, thus achieving the effect of monitoring flooding inside the spray tower.

[0018] 3. This high-efficiency, low-consumption waste gas purification system for industrial production utilizes a lifting drive assembly, upper and lower mesh plates, and a top pin. When flooding occurs inside the spray tower, the processor receives a signal and, to prevent the washing liquid from overflowing from the top of the tower, outputs a signal to control the air inlet valve to reduce the waste gas intake, thus reducing the resistance of the rising waste gas to the downward flow of the washing liquid. It also controls the water inlet valve to reduce the amount of water sprayed from the spray pipes, mitigating the accumulation of washing liquid within the packing layer. This, combined with the drive motor rotating the central shaft, which in turn rotates the gears, causing the rack to move downwards. The fixed plate moves downward, which in turn moves the lower grid plate, connecting plate, and upper grid plate downward. This causes the pins on the upper grid plate to insert into the grid grooves of the upper grid plate, and the pins on the lower grid plate to insert into the grid grooves of the lower grid plate. The pins reciprocate, clearing the grid grooves and pushing the packing layer to move, allowing the washing liquid in the packing layer to flow quickly downward from the grid grooves. This three-pronged approach automatically solves the problem of liquid overflow in the spray tower, avoiding the need for manual maintenance that affects the waste gas purification efficiency of traditional spray towers.

[0019] 4. This high-efficiency and low-consumption waste gas purification system applied to industrial production, by setting up a water collection chamber and an air inlet pipe, allows the waste gas to preferentially enter the water collection chamber before entering the packing layer. The waste gas comes into preferential contact with the washing liquid accumulated in the water collection chamber, and the washing liquid washes away large particulate impurities and soluble impurities in the waste gas, reducing the purification burden on the packing layer and effectively extending the clogging cycle of the packing. Attached Figure Description

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

[0021] Figure 2 This is a front sectional view of the spray tower of the present invention;

[0022] Figure 3 This is a side sectional view of the spray tower of the present invention;

[0023] Figure 4 This is a schematic diagram of the lower grid plate and lifting drive assembly structure of the present invention;

[0024] Figure 5 This is a schematic diagram of the rack and gear meshing connection structure of the present invention;

[0025] Figure 6 This is a schematic diagram of the water collection hopper connection structure of the present invention;

[0026] Figure 7 This is a block diagram of the module structure of the present invention.

[0027] In the diagram: 1. Inlet pipe; 2. Gas collection hood; 3. Heat exchanger; 4. Baghouse dust collector; 5. Spray tower; 51. Demister; 52. Upper grid plate; 53. Lower grid plate; 54. Packing layer; 55. Spray assembly; 551. Water pipe; 552. Circulating pump; 553. Spray pipe; 554. Spray nozzle; 555. Inlet valve; 56. Connecting plate; 561. Slide groove; 562. Slide rail; 57. Upper grid plate; 58. Lower grid plate; 59. Ejector pin; 510. Fixing plate; 5101. Groove; 5102. Rack; 511. Lifting drive assembly 5111, Central Shaft; 5112, First Bearing; 5113, Gear; 5114, Drive Motor; 512, Water Collection Tank; 5121, Drainage Outlet; 5122, Mounting Bracket; 5123, Rotating Shaft; 5124, Second Bearing; 5125, Impeller; 5126, Generator; 513, Water Collection Chamber; 5131, Liquid Level Sensor; 514, Water Storage Chamber; 515, Circulating Water Tank; 516, Filter Screen; 517, Control Box; 5171, Processor; 5172, Battery; 6, Air Outlet Pipe; 7, Fan; 8, Chimney; 9, Inlet Valve. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0031] like Figures 1 to 7 As shown, this embodiment is applied to a high-efficiency, low-consumption waste gas purification system for industrial production. It includes a spray tower 5, a bag filter 4, a heat exchanger 3, an inlet pipe 1 connecting the spray tower 5, the bag filter 4, and the heat exchanger 3, a gas collection hood 2 installed at one end of the inlet pipe 1, an outlet pipe 6 installed at the top of the spray tower 5, a fan 7 installed at the bottom of the outlet pipe 6, and a chimney 8 installed at the outlet of the fan 7. The heat exchanger 3 and the bag filter 4 are commonly used devices in existing purification systems. An upper grid plate 52 is installed inside the spray tower 5. Below the upper grid plate 52... The spray tower 5 is equipped with a lower grating plate 53. Both the upper grating plate 52 and the lower grating plate 53 are circular and are slidably connected to the inner wall of the spray tower 5, facilitating the raising and lowering of the upper grating plate 52 and the lower grating plate 53. A packing layer 54 is provided on the upper surface of both the upper grating plate 52 and the lower grating plate 53, containing commonly used packing materials. A demister 51 is installed at the top of the inner cavity of the spray tower 5 to remove residual washing liquid carried in the gas. A connecting plate 56 connects the upper grating plate 52 and the lower grating plate 53, enabling synchronous raising and lowering of the upper grating plate 52 and the lower grating plate 53. The inner wall of the spray tower 5 below 52 is equipped with an upper grid plate 57, and the inner wall of the spray tower 5 below the lower grid plate 53 is equipped with a lower grid plate 58. The upper grid plate 57 and the lower grid plate 58 are used to install ejector pins 59. Ejector pins 59 are installed on the upper surfaces of both the upper grid plate 57 and the lower grid plate 58 to unclog the grid channels and move the packing material within the packing layer 54, allowing the washing liquid blocked within the packing layer 54 to flow out smoothly. A lifting drive assembly 511 is installed inside the spray tower 5 below the lower grid plate 58 to drive the lower grid plate 53 to rise and fall. The inner wall of the square spray tower 5 is equipped with a water collection hopper 512. The washing liquid sprayed down by the spray pipe 553, after fully contacting the waste gas, passes through the packing layer 54 and falls into the water collection hopper 512. The water collection hopper 512 collects the washing liquid, so that the washing liquid flows downward from the drain outlet 5121. The water collection hopper 512 is used for water collection and power generation of the washing liquid flow, and also provides a basis for the liquid level sensor 5131 to detect the water level in the water collection chamber 513 to indirectly detect whether flooding has occurred. It also provides preliminary immersion washing for the waste gas, so that the spray tower 5 can perform a three-stage purification effect on the waste.

[0032] Specifically, the connecting plate 56 has a groove 561 inside, and a slide rail 562 is slidably connected inside the groove 561. The slide rail 562 is installed on the inner wall of the spray tower 5 and vertically guides the connecting plate 56 through the slide rail 562, so that the connecting plate 56, the upper grid plate 52 and the lower grid plate 53 will only rise and fall, but will not rotate or shift relative to the spray tower 5. The connecting plate 56 is arc-shaped and contacts the inner wall of the spray tower 5. The upper grid plate 52 and the lower grid plate 53 are slidably connected to the spray tower 5 through the connecting plate 56. By the rise and fall of the lower grid plate 53, the connecting plate 56 and the upper grid plate 52, the pins 59 on the upper grid plate 57 are reciprocated in the grid groove of the upper grid plate 52, and the pins 59 on the lower grid plate 58 are reciprocated in the grid groove of the lower grid plate 53.

[0033] Furthermore, both the upper grid plate 57 and the lower grid plate 58 are grid-shaped, and the grid gaps of the grid plates must be larger than the grid grooves to avoid obstructing the downward flow of washing liquid. A groove is opened on one side of the upper grid plate 57 for the connecting plate 56 to pass through, so that the connecting plate 56 can pass through the upper grid plate 57 to connect the upper grid plate 52 and the lower grid plate 53. Grooves are opened on both sides of the lower grid plate 58 for the fixing plate 510 to pass through, so that the fixing plate 510 can pass through the lower grid plate 58 to connect with the gear 5113. There are several ejector pins 59. The position of the ejector pins 59 on the upper grid plate 57 corresponds to the position of the grid groove in the upper grid plate 52, and the position of the ejector pins 59 on the lower grid plate 58 corresponds to the position of the grid groove in the lower grid plate 53. After the anvil is inserted into the grid groove, on the one hand, the ejector pins 59 clear the grid groove, and on the other hand, the ejector pins 59 insert into the packing layer 54 to push the packing to move, so that the washing liquid in the packing layer 54 flows down from the grid groove quickly.

[0034] Furthermore, fixing plates 510 are connected to both sides of the lower surface of the lower grille plate 53 for mounting racks 5102. The fixing plate 510 has a groove 5101 in the middle forming an inverted U-shape. The groove 5101 provides space for the gear 5113 to mesh with the rack 5102. A rack 5102 is installed on the inner wall of one side of the fixing plate 510. There are two fixing plates 510, which are symmetrically arranged relative to the lower grille plate 53. When the gear 5113 rotates, it drives the two racks 5102 to rise and fall respectively, thereby supporting both sides of the lower grille plate 53 at the same time and keeping the lower grille plate 53 stable in raising and lowering.

[0035] Furthermore, the lifting drive assembly 511 includes a central shaft 5111 that runs through the spray tower 5. Both ends of the central shaft 5111 are equipped with first bearings 5112 between them and the spray tower 5. The first bearings 5112 are acid and alkali resistant. Gears 5113 are installed on the outer side of the central shaft 5111 below the two fixing plates 510. One end of the central shaft 5111 extends from the side wall of the spray tower 5 and is connected to a drive motor 5114. The drive motor 5114 is installed on the side wall of the spray tower 5 and is essentially a motor with forward and reverse rotation circuits to facilitate the lifting and lowering of the lower grid plate 53. The shaft end of the drive motor 5114 is connected to the central shaft 5111.

[0036] Furthermore, the central shaft 5111 is rotatably connected to the spray tower 5 via the first bearing 5112, and the two gears 5113 rotate synchronously via the central shaft 5111. The two gears 5113 are respectively inserted into the grooves 5101 of the two fixed plates 510. The gears 5113 and the rack 5102 mesh with each other. The central shaft 5111 is driven to rotate by the drive motor 5114, and the central shaft 5111 drives the gears 5113 to rotate. The gears 5113 drive the rack 5102 to rise and fall, and the rack 5102 drives the fixed plate 510 to rise and fall. The fixed plate 510 drives the lower grid plate 53, the connecting plate 56 and the upper grid plate 52 to rise and fall.

[0037] Furthermore, a drain outlet 5121 is provided at the bottom of the water collection hopper 512. The drain outlet 5121 has a small diameter, allowing the washing liquid in the water collection chamber 513 to flow out in a concentrated manner. Mounting brackets 5122 are connected to the lower surfaces of the water collection hoppers 512 on both sides of the drain outlet 5121 for mounting the rotating shaft 5123 and impeller 5125. A rotating shaft 5123 is connected through the two mounting brackets 5122. An impeller 5125 is mounted on the outer side of the rotating shaft 5123 between the two mounting brackets 5122. Second bearings 5124 are installed at both ends of the rotating shaft 5123 between one mounting bracket 5122 and the side wall of the spray tower 5, respectively. The second bearings 5124 are made of acid and alkali resistant type. One end of the rotating shaft 5123 extends from the side wall of the spray tower 5 and is connected to a generator 5126. The generator 5126 is installed inside the control box 517. The rotor inside the generator 5126 is connected to the shaft 5123. The inner cavity of the water collection hopper 512 is connected to the inner cavity of the spray tower 5 to form a water collection chamber 513. A liquid level sensor 5131 is installed inside the water collection chamber 513. When the washing liquid continuously sprays the exhaust gas, the washing liquid flows into the water collection chamber 513 continuously. Therefore, the water level of the washing liquid collected in the water collection chamber 513 is in dynamic equilibrium. When the spray tower 5 is normally purifying the exhaust gas, the liquid level in the water collection chamber 513 detected by the liquid level sensor 5131 is within the normal range. However, when flooding occurs, the amount of washing liquid flowing into the water collection chamber 513 decreases, while the drain outlet 5121 continues to drain water. Therefore, the water level in the water collection chamber 513 will drop abnormally. The change in the water level in the water collection chamber 513 is used to indirectly detect whether flooding has occurred in the spray tower 5.

[0038] Furthermore, the drain outlet 5121 corresponds to the impeller 5125, ensuring that the washing liquid discharged from the drain outlet 5121 falls precisely onto the impeller 5125, driving the impeller 5125 to rotate continuously in one direction. The impeller 5125 is rotatably connected to the mounting bracket 5122 via the rotating shaft 5123. The water flowing from the drain outlet 5121 falls onto the impeller 5125, driving the impeller 5125 to rotate around the rotating shaft 5123. The rotation of the impeller 5125 drives the rotating shaft 5123 to rotate, which in turn drives the rotor of the generator 5126 to rotate, causing the generator 5126 to generate electricity and supply the electrical energy to the internal electrical equipment of the spray tower 5. This utilizes the potential energy of the washing liquid flowing into the water storage chamber 514, reducing the pressure on the circulating pump 552 of the spray tower 5. The power consumption of the fan 7 is controlled by an air inlet valve 9 installed near the spray pipe 553 in the air inlet pipe 1. The air inlet valve 9 is used to adjust the air flow rate of the exhaust gas in the air inlet pipe 1. When flooding occurs in the spray tower 5, the processor 5171 outputs a signal to control the air inlet valve 9 to reduce the exhaust gas intake, which can reduce the resistance of the rising exhaust gas to the downward flow of the washing liquid. The air inlet pipe 1 passes through the side wall of the spray tower 5 and is connected to the water collection hopper 512. The inner cavity of the air inlet pipe 1 is connected to the water collection chamber 513. The exhaust gas is preferentially introduced into the water collection chamber 513 before entering the packing layer 54. The exhaust gas comes into preferential contact with the washing liquid accumulated in the water collection chamber 513. The washing liquid washes away large particulate impurities and soluble impurities in the exhaust gas, reducing the purification burden on the packing layer 54 and effectively extending the clogging cycle of the packing.

[0039] Furthermore, a spray assembly 55 is installed inside the spray tower 5 above the two packing layers 54 for spraying the exhaust gas. The sprayed washing liquid forms droplets that mix thoroughly with the exhaust gas to undergo a third purification. The spray assembly 55 includes a circulation pump 552 installed on the upper surface of the circulating water tank 515. The outlet of the circulation pump 552 is connected to a water pipe 551. Two spray pipes 553 are connected to the top of the water pipe 551. Spray nozzles 554 are installed at the bottom of the spray pipes 553. Water inlet valves 555 are installed at the connection points between the two spray pipes 553 and the water pipe 551. The water inlet valves 555 are used to adjust the water flow rate of the washing liquid sprayed from the spray pipes 553. When flooding occurs in the spray tower 5, the processor 5171 controls the water inlet valves 555 to reduce the amount of water sprayed from the spray pipes 553, thereby reducing the accumulation of washing liquid in the packing layer 54.

[0040] Furthermore, the spray tower 5 below the water collection hopper 512 has a water storage chamber 514 inside. A circulating water tank 515 is connected to one side of the spray tower 5. When using acidic or alkaline washing liquid, chemicals can be added to the washing liquid at the circulating water tank 515 to adjust its pH value. A filter screen 516 is installed between the circulating water tank 515 and the spray tower 5 to filter the washing liquid in the water storage tank, facilitating the reuse of the washing liquid. A control box 517 is installed on the other side of the spray tower 5. A processor 5171 is installed inside the control box 517. A storage battery 5172 is installed inside the control box 5171 on one side of the processor 5171 to store excess electrical energy generated by the generator 5126. The storage battery 5172 is electrically connected to the generator 5126 through a circuit. A liquid level sensor 5131 is electrically connected to the input terminal of the processor 5171 through a circuit.

[0041] The usage method of this embodiment is as follows: When the user actually uses the purification system to purify industrial waste gas, the fan 7 first draws the industrial waste gas from the gas collection hood 2 into the air inlet pipe 1. After the waste gas passes through the heat exchanger 3 for cooling and the bag filter 4 for dust removal, it enters the spray tower 5. At the same time, the circulating pump 552 introduces the washing liquid in the circulating water tank 515 into the spray pipe 553 through the water pipe 551. The washing liquid is sprayed out through the nozzle 554 and falls on the packing of the packing layer 54 to form a liquid film. The washing liquid that passes through the packing flows downward and falls into the water collection chamber 513. The waste gas preferentially enters the water collection chamber 513 before entering the packing layer 54. The waste gas comes into preferential contact with the washing liquid accumulated in the water collection chamber 513, and the washing liquid washes away large particulate impurities in the waste gas. The exhaust gas undergoes initial purification, removing soluble impurities. It then rises, passing through the lower grid plate 58 and lower grille plate 53, and enters the lower packing layer 54. The exhaust gas comes into full contact with the packing and undergoes a chemical reaction, completing secondary purification. The purified exhaust gas continues to rise, and the mist sprayed from the spray pipe 553 mixes and contacts the exhaust gas, continuing the reaction to complete tertiary purification. After purification, the gas rises, passes through the demister 51 to remove the carried washing liquid, and is discharged into the chimney 8 through the outlet pipe 6. Simultaneously, the washing liquid in the water collection chamber 513 flows downwards from the drain outlet 5121. The water discharged from the drain outlet 5121 falls onto the impeller 5125, pushing it to rotate around the shaft 5123. The rotation of the impeller 5125 drives the rotating... The shaft 5123 rotates, driving the rotor of the generator 5126 to rotate, causing the generator 5126 to generate electricity. The generator 5126 supplies the converted electrical energy to the internal electrical equipment of the spray tower 5. Excess electrical energy is stored in the battery 5172. When the water level in the water collection chamber 513 is lower than the normal range, it indicates that the washing liquid in the packing layer 54 is having difficulty flowing downwards. At this time, the liquid level sensor 5131 detects the water level data in the water collection chamber 513 and transmits the data to the processor 5171. The processor 5171 outputs a signal to remind the staff that flooding has occurred in the spray tower 5, and controls the air inlet valve 9 to reduce the amount of exhaust gas entering, reducing the resistance of the rising exhaust gas to the downward flow of the washing liquid. It also controls the water inlet valve 555 to reduce the amount of water sprayed from the spray pipe 553, thus reducing the impact on the spraying process. The system detects the accumulation of washing liquid within the packing layer 54, then controls the start of the drive motor 5114. The drive motor 5114 rotates the central shaft 5111, which in turn rotates the gear 5113. The gear 5113 drives the rack 5102 downwards, which in turn moves the fixing plate 510 downwards. The fixing plate 510 then moves the lower grid plate 53, the connecting plate 56, and the upper grid plate 52 downwards, causing the pins 59 on the upper grid plate 57 to insert into the grid grooves of the upper grid plate 52, and the pins 59 on the lower grid plate 58 to insert into the grid grooves of the lower grid plate 53. The drive motor 5114 rotates in both directions, driving the pins 59 to reciprocate. On one hand, the pins 59 clear the grid grooves; on the other hand, the pins 59 push the packing material in the packing layer 54 to move.This allows the washing liquid within the packing layer 54 to flow rapidly downwards from the grid channel.

[0042] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An efficient and low-consumption waste gas purification system applied to industrial production, comprising a spray tower (5), a bag-type dust collector (4), a heat exchanger (3), an air inlet pipeline (1) connected between the spray tower (5), the bag-type dust collector (4) and the heat exchanger (3), a gas collection hood (2) installed at one end of the air inlet pipeline (1), an air outlet pipeline (6) installed at the top of the spray tower (5), a fan (7) installed at the bottom of the air outlet pipeline (6), and a chimney (8) installed at the air outlet of the fan (7), characterized in that: The upper grid plate (52) is provided with a filler layer (54) on the upper surface, a demister (51) is installed on the top of the inner cavity of the spray tower (5), and the upper grid plate (52) and the lower grid plate (53) are connected through a connecting plate (56). The lower surface of the lower grid plate (53) is connected with a fixing plate (510) on both sides, the middle part of the fixing plate (510) is provided with a groove (5101) to form an inverted U shape, a rack (5102) is installed on one side of the inner wall of the fixing plate (510), and the number of the fixing plates (510) is two and they are symmetrically arranged relative to the lower grid plate (53). The lifting driving assembly (511) comprises a middle shaft (5111) penetrating through the spray tower (5), first bearings (5112) are installed between the two ends of the middle shaft (5111) and the spray tower (5), gear wheels (5113) are installed on the outer side of the middle shaft (5111) below the two fixing plates (510), and a driving motor (5114) is connected to one end of the middle shaft (5111) extending out of the side wall of the spray tower (5). The bottom of the water collecting hopper (512) is provided with a drain port (5121), the lower surface of the water collecting hopper (512) on both sides of the drain port (5121) is connected with a mounting bracket (5122), a rotating shaft (5123) is penetratingly arranged between the two mounting brackets (5122), an impeller (5125) is installed on the outer side of the rotating shaft (5123) between the two mounting brackets (5122), second bearings (5124) are installed between the rotating shaft (5123) and one mounting bracket (5122) and the side wall of the spray tower (5) respectively, a power generator (5126) is connected to one end of the rotating shaft (5123) extending out of the side wall of the spray tower (5), the inner cavity of the water collecting hopper (512) is communicated with the inner cavity of the spray tower (5) to form a water collecting cavity (513), and a liquid level sensor (5131) is installed in the water collecting cavity (513).

2. The system according to claim 1, characterized in that: The connecting plate (56) is internally provided with a sliding groove (561), the sliding groove (561) is internally and slidably connected with a sliding rail (562), the sliding rail (562) is installed on the inner wall of the spray tower (5), the connecting plate (56) is in the shape of an arc plate and is in contact with the inner wall of the spray tower (5), the upper grid plate (52) and the lower grid plate (53) are slidably connected with the spray tower (5) through the connecting plate (56).

3. The system according to claim 1, characterized in that: The upper grid plate (57) and the lower grid plate (58) are both in the shape of a grid, the upper grid plate (57) is provided with a groove on one side for the connecting plate (56) to pass through, and the lower grid plate (58) is provided with grooves on both sides for the fixing plates (510) to pass through.

4. The system according to claim 1, characterized in that: The middle shaft (5111) is rotatably connected with the spray tower (5) through the first bearing (5112), the two gears (5113) are synchronously rotatable through the middle shaft (5111), and the two gears (5113) are respectively inserted into the grooves (5101) in the two fixing plates (510). The gear (5113) is meshed with the rack (5102).

5. The system according to claim 1, characterized in that: The drain port (5121) corresponds to the position of the impeller (5125), the impeller (5125) is rotatably connected with the mounting bracket (5122) through the rotating shaft (5123), the air inlet pipeline (1) is provided with an air inlet valve (9) near the spray pipe (553), the air inlet pipeline (1) passes through the side wall of the spray tower (5) and is connected with the water collecting hopper (512), and the inner cavity of the air inlet pipeline (1) is communicated with the water collecting cavity (513).

6. The system according to claim 1, characterized in that: The spray assembly (55) is installed in the spray tower (5) above the two filler layers (54), the spray assembly (55) comprises a circulating pump (552) installed on the upper surface of a circulating water tank (515), a water outlet of the circulating pump (552) is connected with a water pipe (551), the water pipe (551) is connected with two spray pipes (553) at the top, the spray pipes (553) are provided with spray heads (554) at the bottom, and water inlet valves (555) are installed at the junctions of the two spray pipes (553) and the water pipe (551).

7. The system according to claim 1, characterized in that: The spray tower (5) below the water collecting hopper (512) is internally provided with a water storage cavity (514), one side of the spray tower (5) is connected with a circulating water tank (515), a filter screen (516) is installed between the circulating water tank (515) and the spray tower (5), the other side of the spray tower (5) is provided with a control box (517), a processor (5171) is installed in the control box (517) on one side of the processor (5171), a storage battery (5172) is installed in the control box (517) on one side of the processor (5171), the storage battery (5172) is electrically connected with a generator (5126) through a circuit, and the liquid level sensor (5131) is electrically connected with the input end of the processor (5171) through a circuit.

Images