Efficient and low-consumption waste gas purification system applied to industrial production

Abstract

The invention discloses an efficient and low-consumption waste gas purification system applied to industrial production, and relates to the technical field of industrial waste gas purification. Comprising a spray tower, a bag-type dust collector, a heat exchanger, an air inlet pipeline connected among the spray tower, the bag-type dust collector and the heat exchanger, an air collecting hood mounted at one end of the air inlet pipeline, an air outlet pipeline mounted at the top of the spray tower, a fan mounted at the bottom of the air outlet pipeline and a chimney mounted at an air outlet of the fan, and an upper grating plate is mounted in the spray tower. By arranging the water collecting hopper, the impeller and the generator, potential energy generated when washing liquid flows into the water storage cavity can be converted into kinetic energy and transmitted to the generator for power generation, the converted electric energy is supplied to electrical equipment in the spray tower for use, and the electric energy consumption of a circulating pump and a fan of the spray tower is reduced; by arranging a water collecting hopper and a liquid level sensor, the effect of monitoring the flooding phenomenon in the spray tower can be achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of industrial waste gas purification, and specifically to an efficient and low-consumption waste gas purification system for industrial production. Background Technique

[0002] Industrial waste gas refers to various harmful gases and particulate matters generated during industrial production. If these waste gases are directly discharged into the atmosphere without treatment, they will cause serious pollution to the environment, affect human health and ecological balance. Therefore, industrial waste gas usually undergoes purification treatment through a purification system before being discharged; currently, the industrial waste gas purification system generally consists of a waste gas pipeline, a gas hood, a heat exchanger, a bag filter, a spray tower, a fan, and a chimney. The waste gas in the factory is collected by the gas hood and conveyed in the waste gas pipeline. After the waste gas is cooled by the heat exchanger and the large particles are removed by the bag filter, it enters the spray tower for purification and is discharged from the chimney after purification.

[0003] During the process of purifying waste gas in the existing spray tower of the industrial waste gas purification system, the fan and the circulation pump for spraying need to operate continuously, and electricity is consumed during the operation; in addition, since the packing in the spray tower directly falls on the grid plate, the washing liquid needs to flow downward through the packing and the grid plate. Once the bottom packing blocks the grid slot, the washing liquid will accumulate in the packing layer and is more difficult to flow downward when subjected to the resistance of the rising waste gas, resulting in the situation where the washing liquid overflows in the packing layer, which is the flooding phenomenon. The existing spray tower does not have the functions of automatic monitoring and automatic maintenance of flooding, which is not conducive to the efficient purification of waste gas by the spray tower. Summary of the Invention

[0004] The purpose of the present invention is to provide an efficient and low-consumption waste gas purification system for industrial production to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the present invention provides the following technical solution: An efficient and low-consumption waste gas purification system for industrial production, including a spray tower, a bag filter, a heat exchanger, an intake pipeline connected between the spray tower, the bag filter, and the heat exchanger, a gas hood installed at one end of the intake pipeline, an outlet pipeline installed at the top of the spray tower, a fan installed at the bottom of the outlet pipeline, and a chimney installed at the air outlet of the fan. An upper grid plate is installed inside the spray tower, a lower grid plate is installed below the upper grid plate, packing layers are provided on the upper surfaces of the upper grid plate and the lower grid plate, a demister is installed at the top of the inner cavity of the spray tower, a connecting plate is connected between the upper grid plate and the lower grid plate, an upper grid plate is installed on the inner wall of the spray tower below the upper grid plate, a lower grid plate is installed on the inner wall of the spray tower below the lower grid plate, thimbles are installed on the upper surfaces of the upper grid plate and the lower grid plate, a lifting drive assembly is installed inside the spray tower below the lower grid plate, and a water collecting hopper is installed on the inner wall of the spray tower below the lifting drive assembly.

[0006] Preferably, a chute is provided inside the connecting plate, a slide rail is slidably connected inside the chute, the slide rail is installed on the inner wall of the spray tower, the connecting plate is in the shape of an arc plate and is in contact with the inner wall of the spray tower, and the upper grid plate and the lower grid plate are both slidably connected to the spray tower through the connecting plate.

[0007] Preferably, both the upper grid plate and the lower grid plate are in a grid shape. A groove for the connecting plate to pass through is provided on one side of the upper grid plate, and grooves for the fixing plates to pass through are provided on both sides of the lower grid plate. The number of thimbles is several. The positions of the thimbles on the upper grid plate correspond to the positions of the grid grooves inside the upper grid plate, and the positions of the thimbles on the lower grid plate correspond to the positions of the grid grooves inside the lower grid plate.

[0008] Preferably, fixing plates are connected to both side edges of the lower surface of the lower grid plate. A groove is provided in the middle of the fixing plate to form an inverted U shape. A rack is installed on the inner wall of one side of the fixing plate. The number of fixing plates is two and they are symmetrically arranged relative to the lower grid plate.

[0009] Preferably, the lifting drive assembly includes a central shaft passing through the spray tower. First bearings are installed between both ends of the central shaft and the spray tower. Gears are installed on the outer sides of the central shaft below the two fixing plates. One end of the central shaft extends out 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 through the first bearing. The two gears rotate synchronously through the central shaft. The two gears are respectively inserted into the grooves of the two fixing plates, and the gears are meshed with the racks.

[0011] Preferably, a drain port is provided at the bottom of the water collecting hopper. Mounting frames are connected to the lower surfaces of the water collecting hopper on both sides of the drain port. A rotating shaft is commonly arranged through between the two mounting frames. An impeller is installed on the outer side of the rotating shaft between the two mounting frames. Second bearings are installed between both ends of the rotating shaft and one mounting frame and the side wall of the spray tower respectively. One end of the rotating shaft extends out from the side wall of the spray tower and is connected to a generator. The inner cavity of the water collecting hopper is communicated with the inner cavity of the spray tower to form a water collecting cavity, and a liquid level sensor is installed inside the water collecting cavity.

[0012] Preferably, the drain port corresponds to the position of the impeller. The impeller is rotatably connected to the mounting frame through the rotating shaft. An intake valve is installed at the position where the intake pipe is close to the spray pipe. The intake pipe passes through the side wall of the spray tower and is connected to the water collecting hopper. The inner cavity of the intake pipe is communicated with the water collecting cavity.

[0013] Preferably, a spraying assembly is commonly installed inside the spray tower above the two packing layers. The spraying assembly includes a circulation pump installed on the upper surface of the circulation water tank. The water outlet of the circulation pump is connected to a water pipe. The top of the water pipe is connected to two spray pipes. The bottom of the spray pipe is installed with a nozzle. Water inlet valves are installed at the joints of the two spray pipes and the water pipe.

[0014] Preferably, a water storage cavity is formed inside the spray tower below the water collecting hopper. A circulation water tank is connected to one side of the spray tower. A filter screen is installed between the circulation 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. A storage battery is installed inside the control box on one side of the processor. The storage battery is electrically connected to the generator through a circuit. The liquid level sensor is electrically connected to the input end of the processor through a circuit.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. In this waste gas high-efficiency and low-consumption purification system applied to industrial production, by setting up a water collecting hopper, an impeller and a generator, the water collecting hopper is installed at the bottom of the packing layer. The washing liquid sprayed by the spray pipe falls into the water collecting cavity after fully contacting the waste gas and passing through the packing layer. The water collecting hopper aggregates the washing liquid, making the washing liquid flow downward from the drain port intensively. The water flow discharged from the drain port falls on the impeller and drives the impeller to rotate around the rotating shaft. The rotation of the impeller drives the rotation of the rotating shaft, and the rotating shaft drives the rotation of the rotor of the generator, enabling the generator to generate electricity and supply the electric energy to the electrical equipment inside the spray tower for use, generating electricity and utilizing the potential energy of the washing liquid flowing into the water storage cavity, and reducing the power consumption of the circulation pump and the fan in the spray tower.

[0016] 2. In this waste gas high-efficiency and low-consumption purification system applied to industrial production, by setting up a water collecting hopper and a liquid level sensor, the inner cavity of the water collecting hopper is connected to the inner cavity of the spray tower to form a water collecting cavity. When the washing liquid continuously sprays the waste gas, the washing liquid continuously flows into the water collecting cavity. Therefore, the water level of the washing liquid collected in the water collecting cavity presents a dynamic balance. The liquid level sensor monitors the water level data in the water collecting cavity in real time and transmits the data to the processor. When the packing layer is blocked and a flooding phenomenon occurs, the washing liquid sprayed from the spray pipe is difficult to flow downward, resulting in the water level in the water collecting cavity being lower than the normal range. At this time, the liquid level sensor transmits an abnormal signal to the processor, and the processor outputs a signal to remind the staff that a flooding phenomenon has occurred inside the spray tower, achieving the effect of monitoring the flooding phenomenon inside the spray tower.

[0017] 3. The high-efficiency and low-consumption waste gas purification system applied to industrial production, by setting a lifting drive assembly, an upper grid plate, a lower grid plate and a thimble. After the liquid flooding processor in the spray tower receives a signal, to prevent the washing liquid from overflowing from the top of the spray tower, the processor outputs a signal to control the intake valve to reduce the intake volume of waste gas, reduce the resistance of the rising waste gas to the downward flow of the washing liquid, and control the water inlet valve to reduce the spraying water volume of the spray pipe, reduce the accumulation of the washing liquid in the packing layer. Cooperate with the drive motor to drive the central shaft to rotate, the central shaft drives the gear to rotate, the gear drives the rack to move downward, the rack drives the fixed plate to move downward, the fixed plate drives the lower grid plate, the connecting plate and the upper grid plate to move downward, so that the thimble on the upper grid plate is inserted into the grid slot of the upper grid plate, and the thimble on the lower grid plate is inserted into the grid slot of the lower grid plate. The thimble reciprocally inserts. On the one hand, the thimble dredges the grid slot, and on the other hand, the thimble inserts into the packing layer to push the packing to move, so that the washing liquid in the packing layer quickly flows downward from the grid slot. By these three-pronged measures, it realizes automatically solving the liquid flooding situation in the spray tower, and avoids the situation that the traditional spray tower relies on manual maintenance to affect the waste gas purification efficiency.

[0018] 4. The high-efficiency and low-consumption waste gas purification system applied to industrial production, by setting a water collecting cavity and an intake pipeline. Before the waste gas enters the packing layer, it is preferentially introduced into the water collecting cavity. The waste gas contacts the washing liquid accumulated in the water collecting cavity first. The large particle impurities and soluble impurities in the waste gas are washed away by the washing liquid, reducing the purification burden of the packing layer, and can effectively extend the clogging period of the packing. Brief Description of the Drawings

[0019] Figure 1 is the overall structural schematic diagram of the present invention; Figure 2 is the front sectional view of the spray tower of the present invention; Figure 3 is the side sectional view of the spray tower of the present invention; Figure 4 is the structural schematic diagram of the lower grid plate and the lifting drive assembly of the present invention; Figure 5 is the structural schematic diagram of the meshing connection between the rack and the gear of the present invention; Figure 6 is the structural schematic diagram of the connection of the water collecting hopper of the present invention; Figure 7 is the block diagram of the module structure of the present invention.

[0020] In the figure: 1, intake pipe; 2, air collecting hood; 3, heat exchanger; 4, bag filter; 5, spray tower; 51, demister; 52, upper grid plate; 53, lower grid plate; 54, packing layer; 55, spray assembly; 551, water pipe; 552, circulation pump; 553, spray pipe; 554, nozzle; 555, inlet valve; 56, connecting plate; 561, chute; 562, slide rail; 57, upper mesh plate; 58, lower mesh plate; 59, ejector pin; 510, fixing plate; 5101, groove; 5102, rack; 511, lifting drive assembly; 5111, central axis; 5112, first bearing; 5113, gear; 5114, drive motor; 512, water collecting hopper; 5121, drain port; 5122, mounting bracket; 5123, rotating shaft; 5124, second bearing; 5125, impeller; 5126, generator; 513, water collecting cavity; 5131, liquid level sensor; 514, water storage cavity; 515, circulation water tank; 516, filter screen; 517, control box; 5171, processor; 5172, storage battery; 6, outlet pipe; 7, fan; 8, chimney; 9, intake valve. Detailed implementation manner

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention 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 of 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 the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0023] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "provided with", "connection", etc. should be understood in a broad sense. 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] As shown Figures 1 to 7 in the figure, this embodiment is applied to an efficient and low-consumption purification system for industrial production waste gas, including a spray tower 5, a bag filter 4, a heat exchanger 3, an intake pipe 1 connected between the spray tower 5, the bag filter 4 and the heat exchanger 3, a gas collecting hood 2 installed at one end of the intake 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 air outlet of the fan 7. The heat exchanger 3 and the bag filter 4 are both common equipment in existing purification systems. An upper grid plate 52 is installed inside the spray tower 5, and a lower grid plate 53 is installed below the upper grid plate 52. Both the upper grid plate 52 and the lower grid plate 53 are circular and are both slidably connected to the inner wall of the spray tower 5 to facilitate the lifting of the upper grid plate 52 and the lower grid plate 53. Packing layers 54 are provided on the upper surfaces of the upper grid plate 52 and the lower grid plate 53, and common packing is used inside the packing layers 54. A demister 51 is installed at the top of the inner cavity of the spray tower 5 to remove the residual washing liquid carried in the gas. A connecting plate 56 is connected between the upper grid plate 52 and the lower grid plate 53 to realize the synchronous lifting between the upper grid plate 52 and the lower grid plate 53. An upper grid plate 57 is installed on the inner wall of the spray tower 5 below the upper grid plate 52, and a lower grid plate 58 is installed on the inner wall of the spray tower 5 below the lower grid plate 53. The upper grid plate 57 and the lower grid plate 58 are used to install thimble 59. Thimble 59 is installed on the upper surfaces of the upper grid plate 57 and the lower grid plate 58 to dredge the grid slots and push the packing inside the packing layer 54 to move, so that the blocked washing liquid in the packing layer 54 can 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 lift. A water collecting hopper 512 is installed on the inner wall of the spray tower 5 below the lifting drive assembly 511. The washing liquid sprayed down by the spray pipe 553 falls into the water collecting hopper 512 after fully contacting the waste gas. The water collecting hopper 512 aggregates the washing liquid, so that the washing liquid flows downward from the drain port 5121 in a concentrated manner. Among them, the water collecting hopper 512 is both used for aggregating the washing liquid for water flow power generation and provides a basis for the liquid level sensor 5131 to indirectly detect whether the liquid flooding phenomenon occurs by detecting the water level in the water collecting cavity 513, and also provides preliminary immersion washing for the waste gas, so that the spray tower 5 can achieve a three-stage purification effect on the waste gas.

[0025] Specifically, a chute 561 is provided inside the connecting plate 56. A slide rail 562 is slidably connected inside the chute 561. The slide rail 562 is installed on the inner wall of the spray tower 5. The connecting plate 56 is vertically guided by the slide rail 562, so that the connecting plate 56, the upper grid plate 52 and the lower grid plate 53 can only move up and down, and will not rotate or shift relative to 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 both slidably connected to the spray tower 5 through the connecting plate 56. By the up and down movement of the lower grid plate 53, the connecting plate 56 and the upper grid plate 52, the ejector pins 59 on the upper grid plate 57 are reciprocally inserted into the grid slots of the upper grid plate 52, and the ejector pins 59 on the lower grid plate 58 are reciprocally inserted into the grid slots of the lower grid plate 53.

[0026] Furthermore, both the upper grid plate 57 and the lower grid plate 58 are in a grid shape, and the grid gaps of the grid plates need to be larger than the grid slots to avoid blocking the downward flow of the washing liquid. A slot for the connecting plate 56 to pass through is provided on one side of the upper grid plate 57, which facilitates the connecting plate 56 to pass through the upper grid plate 57 to connect the upper grid plate 52 and the lower grid plate 53. Slots for the fixing plate 510 to pass through are provided on both sides of the lower grid plate 58, which facilitates the fixing plate 510 to pass through the lower grid plate 58 to connect with the gear 5113. The number of ejector pins 59 is several. The positions of the ejector pins 59 on the upper grid plate 57 correspond to the positions of the inner grid slots of the upper grid plate 52, and the positions of the ejector pins 59 on the lower grid plate 58 correspond to the positions of the inner grid slots of the lower grid plate 53. After the anvil is inserted into the grid slot, on the one hand, the grid slot is dredged by the ejector pin 59, and on the other hand, the ejector pin 59 is inserted into the packing layer 54 to push the packing to move, so that the washing liquid in the packing layer 54 can quickly flow downward from the grid slot.

[0027] Furthermore, fixing plates 510 are connected to both side edges of the lower surface of the lower grid plate 53 for installing the racks 5102. A groove 5101 is provided in the middle of the fixing plate 510 to form an inverted U shape. The groove 5101 provides space for the meshing of the gear 5113 and the rack 5102. A rack 5102 is installed on one inner wall of the fixing plate 510. The number of fixing plates 510 is two and they are symmetrically arranged relative to the lower grid plate 53. When the gear 5113 rotates, it drives the two racks 5102 to move up and down respectively, thereby simultaneously supporting both sides of the lower grid plate 53 and keeping the lower grid plate 53 moving up and down stably.

[0028] Furthermore, the lifting drive assembly 511 includes a central shaft 5111 that penetrates through the spray tower 5. At both ends of the central shaft 5111, first bearings 5112 are installed between the central shaft 5111 and the spray tower 5. The first bearings 5112 are of acid and alkali resistant type. On the outer side of the central shaft 5111 below the two fixed plates 510, gears 5113 are installed. One end of the central shaft 5111 extends out 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 the drive motor 5114 is essentially a motor with a forward and reverse circuit, which is convenient for driving the lower grille plate 53 to lift, and the shaft end of the drive motor 5114 is connected to the central shaft 5111.

[0029] Furthermore, the central shaft 5111 is rotationally connected to the spray tower 5 through the first bearings 5112. The two gears 5113 rotate synchronously through the central shaft 5111. The two gears 5113 are respectively inserted into the grooves 5101 of the two fixed plates 510. The gears 5113 mesh with the racks 5102. By driving the central shaft 5111 to rotate through the drive motor 5114, the central shaft 5111 drives the gears 5113 to rotate. The gears 5113 drive the racks 5102 to lift, and the racks 5102 drive the fixed plates 510 to lift. The fixed plates 510 drive the lower grille plate 53, the connecting plate 56, and the upper grille plate 52 to lift.

[0030] Furthermore, a drain port 5121 is opened at the bottom of the water collecting hopper 512. The diameter of the drain port 5121 is small, so that the washing liquid in the water collecting cavity 513 flows out concentratedly. On the lower surfaces of the water collecting hopper 512 on both sides of the drain port 5121, mounting brackets 5122 are connected, which are used to mount the rotating shaft 5123 and the impeller 5125. A rotating shaft 5123 is commonly penetrated 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 two ends of the rotating shaft 5123 and one mounting bracket 5122 and the side wall of the spray tower 5 respectively. The second bearings 5124 are of acid and alkali resistant type. One end of the rotating shaft 5123 extends out from the side wall of the spray tower 5 and is connected to a generator 5126. The generator 5126 is installed in the control box 517, and the rotor in the generator 5126 is connected to the rotating shaft 5123. 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. A liquid level sensor 5131 is installed inside the water collecting cavity 513. When the washing liquid continuously sprays the waste gas, the washing liquid continuously flows into the water collecting cavity 513. Therefore, the water level of the washing liquid collected in the water collecting cavity 513 presents a dynamic balance. When the spray tower 5 normally purifies the waste gas, the liquid level in the water collecting cavity 513 detected by the liquid level sensor 5131 is within the normal range. When the flooding phenomenon occurs, the amount of the washing liquid flowing into the water collecting cavity 513 decreases, while the drain port 5121 is still draining continuously. Therefore, the water level in the water collecting cavity 513 will decrease abnormally. By borrowing the change of the water level in the water collecting cavity 513, it can be indirectly detected whether the flooding phenomenon occurs in the spray tower 5.

[0031] Furthermore, the drain outlet 5121 corresponds to the position of the impeller 5125, so that the washing liquid discharged from the drain outlet 5121 precisely falls on the impeller 5125 and pushes the impeller 5125 to continuously rotate in one direction. The impeller 5125 is rotationally connected to the mounting bracket 5122 via a rotating shaft 5123. The water flow discharged from the drain outlet 5121 falls on the impeller 5125 and pushes the impeller 5125 to rotate around the rotating shaft 5123. The rotation of the impeller 5125 drives the rotation of the rotating shaft 5123, and the rotating shaft 5123 drives the rotation of the rotor of the generator 5126, enabling the generator 5126 to generate electricity and supply the electrical energy to the internal electrical equipment of the spray tower 5, thereby utilizing the potential energy of the washing liquid flowing into the water storage chamber 514 and reducing the power consumption of the circulation pump 552 and the fan 7 of the spray tower 5. An intake valve 9 is installed near the spray pipe 553 of the intake pipe 1. The intake valve 9 is used to adjust the gas flow rate of the waste gas in the intake pipe 1. When a flooding phenomenon occurs in the spray tower 5, the processor 5171 outputs a signal to control the intake valve 9 to reduce the intake volume of the waste gas, which can reduce the resistance of the rising waste gas to the downward flow of the washing liquid. The intake pipe 1 passes through the side wall of the spray tower 5 and is connected to the water collecting hopper 512. The inner cavity of the intake pipe 1 is communicated with the water collecting chamber 513. The waste gas is preferentially introduced into the water collecting chamber 513 before entering the packing layer 54. The waste gas comes into contact with the washing liquid accumulated in the water collecting chamber 513 first, and the large particle impurities and soluble impurities in the waste gas are washed away by the washing liquid, reducing the purification burden of the packing layer 54 and effectively extending the clogging cycle of the packing.

[0032] Furthermore, a spray assembly 55 is commonly installed inside the spray tower 5 above the two packing layers 54 for spraying the waste gas. The sprayed washing liquid forms droplets and reacts fully with the waste gas for the third purification. The spray assembly 55 includes a circulation pump 552 installed on the upper surface of the circulation water tank 515. The water outlet of the circulation pump 552 is connected to a water pipe 551. The top of the water pipe 551 is connected to two spray pipes 553. Nozzles 554 are installed at the bottom of the spray pipes 553. Water inlet valves 555 are installed at the joints of 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 a flooding phenomenon occurs in the spray tower 5, the processor 5171 controls the water inlet valves 555 to reduce the spraying water volume of the spray pipes 553, reducing the accumulation of the washing liquid in the packing layer 54.

[0033] Furthermore, a water storage cavity 514 is provided inside the spray tower 5 below the water collecting hopper 512. A circulation water tank 515 is connected to one side of the spray tower 5. When using an acidic or alkaline cleaning solution, medicine can be added to the cleaning solution at the circulation water tank 515 to adjust its pH value. A filter screen 516 is installed between the circulation water tank 515 and the spray tower 5 for filtering the cleaning solution in the water storage tank to facilitate the reuse of the cleaning solution. 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 517 on one side of the processor 5171 for storing the excess electric energy generated by the generator 5126. The storage battery 5172 is electrically connected to the generator 5126 through a circuit. The liquid level sensor 5131 is electrically connected to the input end of the processor 5171 through a circuit.

[0034] The usage method of this embodiment is as follows: When the user actually uses the purification system to purify industrial waste gas, first, the fan 7 sucks the waste gas generated by the industry from the air collecting hood 2 into the intake pipe 1. After the waste gas is cooled by the heat exchanger 3 and dust-removed by the bag filter 4 in sequence, it enters the spray tower 5. At the same time, the circulating pump 552 passes 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 by the spray head 554 and falls on the packing of the packing layer 54 to form a liquid film. The washing liquid passing through the packing flows downward and falls into the water collecting cavity 513. The waste gas is preferentially passed into the water collecting cavity 513 before entering the packing layer 54. The waste gas comes into contact with the washing liquid accumulated in the water collecting cavity 513 preferentially, and the large particle impurities and soluble impurities in the waste gas are washed away by the washing liquid for primary purification. Then, the waste gas rises and passes through the lower grid plate 58 and the lower grille plate 53 into the lower packing layer 54. The waste gas makes full contact with the packing and undergoes a chemical reaction to complete secondary purification. The waste gas after being purified by the packing continues to rise. The mist droplets sprayed from the spray pipe 553 are fully mixed and contacted with the waste gas, and the reaction continues to complete tertiary purification. After the purification is completed, the gas rises, passes through the demister 51 to remove the carried washing liquid, and then is discharged into the chimney 8 through the outlet pipe 6. While purifying the waste gas, the washing liquid in the water collecting cavity 513 is concentrated and flows downward from the drain port 5121. The water flowing out from the drain port 5121 falls on the impeller 5125 and drives the impeller 5125 to rotate around the rotating shaft 5123. The rotation of the impeller 5125 drives the rotation of the rotating shaft 5123, and the rotating shaft 5123 drives the rotation of the rotor of the generator 5126, so that the generator 5126 generates electricity. The generator 5126 supplies the converted electric energy for the internal electrical equipment of the spray tower 5 to use, and the redundant electric energy is stored in the storage battery 5172. When the water level in the water collecting cavity 513 is lower than the normal range, it indicates that the washing liquid in the packing layer 54 is difficult to flow downward. At this time, the liquid level sensor 5131 detects the water level data in the water collecting cavity 513 and transmits the data to the processor 5171. The processor 5171 outputs a signal to remind the staff that a flooding phenomenon occurs in the spray tower 5, and controls the intake valve 9 to reduce the intake volume of the waste gas, reduce the resistance of the rising waste gas to the downward flow of the washing liquid, control the water inlet valve 555 to reduce the spraying water volume of the spray pipe 553, relieve the accumulation of the washing liquid in the packing layer 54, and then control the driving motor 5114 to start. The driving motor 5114 drives the central shaft 5111 to rotate, the central shaft 5111 drives the gear 5113 to rotate, the gear 5113 drives the rack 5102 to move downward, the rack 5102 drives the fixing plate 510 to move downward, the fixing plate 510 drives the lower grille plate 53, the connecting plate 56 and the upper grille plate 52 to move downward, so that the ejector pin 59 on the upper grid plate 57 is inserted into the grille slot of the upper grille plate 52, and the ejector pin 59 on the lower grid plate 58 is inserted into the grille slot of the lower grille plate 53. The ejector pin 59 is driven to reciprocally insert by the forward and reverse rotation of the driving motor 5114. On the one hand, the grille slot is dredged by the ejector pin 59, and on the other hand, the ejector pin 59 is inserted into the packing layer 54 to push the packing to move.The washing liquid in the packing layer 54 is made to flow rapidly downward from the grid trough.,

[0035] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used 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 recorded in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An efficient and low-consumption purification system for waste gas applied to industrial production, comprising a spray tower (5), a bag filter (4), a heat exchanger (3), an intake pipe (1) connected between the spray tower (5), the bag filter (4) and the heat exchanger (3), a gas collecting hood (2) installed at one end of the intake 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 air outlet of the fan (7), characterized in that: Inside the spray tower (5), an upper grid plate (52) is installed. Below the upper grid plate (52), a lower grid plate (53) is installed. Packing layers (54) are arranged on the upper surfaces of both the upper grid plate (52) and the lower grid plate (53). A demister (51) is installed at the top of the inner cavity of the spray tower (5). A connecting plate (56) is connected between the upper grid plate (52) and the lower grid plate (53). An upper grid plate (57) is installed on the inner wall of the spray tower (5) below the upper grid plate (52). A lower grid plate (58) is installed on the inner wall of the spray tower (5) below the lower grid plate (53). Thimble pins (59) are installed on the upper surfaces of both the upper grid plate (57) and the lower grid plate (58). A lifting drive assembly (511) is installed inside the spray tower (5) below the lower grid plate (58). A water collecting hopper (512) is installed on the inner wall of the spray tower (5) below the lifting drive assembly (511).

2. The waste gas high-efficiency and low-consumption purification system applied to industrial production according to claim 1, wherein: A chute (561) is formed inside the connecting plate (56). A slide rail (562) is slidably connected inside the chute (561). The slide 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). Both the upper grid plate (52) and the lower grid plate (53) are slidably connected to the spray tower (5) through the connecting plate (56).

3. The waste gas high-efficiency and low-consumption purification system applied to industrial production according to claim 1, characterized in that: Both the upper grid plate (57) and the lower grid plate (58) are in a grid shape. A slot for the connecting plate (56) to pass through is formed on one side of the upper grid plate (57). Slots for a fixing plate (510) to pass through are formed on both sides of the lower grid plate (58). The number of thimble pins (59) is several. The positions of the thimble pins (59) on the upper grid plate (57) correspond to the positions of the grid slots inside the upper grid plate (52). The positions of the thimble pins (59) on the lower grid plate (58) correspond to the positions of the grid slots inside the lower grid plate (53).

4. The waste gas high-efficiency and low-consumption purification system applied to industrial production according to claim 1, wherein: Fixing plates (510) are connected to both side edges of the lower surface of the lower grid plate (53). A groove (5101) is formed in the middle of the fixing plate (510) to form an inverted U shape. A rack (5102) is installed on the inner wall of one side of the fixing plate (510). The number of fixing plates (510) is two, and they are symmetrically arranged relative to the lower grid plate (53).

5. The waste gas high-efficiency and low-consumption purification system applied to industrial production according to claim 4, characterized in that: The lifting drive assembly (511) includes a central shaft (5111) passing through the spray tower (5). First bearings (5112) are installed between both ends of the central shaft (5111) and the spray tower (5). Gears (5113) are installed on the outer sides of the central shaft (5111) below both fixing plates (510). One end of the central shaft (5111) extends out from the side wall of the spray tower (5) and is connected to a drive motor (5114).

6. The waste gas high-efficiency and low-consumption purification system applied to industrial production according to claim 5, wherein: The central shaft (5111) is rotatably connected to the spray tower (5) via a first bearing (5112). 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 fixing plates (510), and the gears (5113) are meshed with the racks (5102).

7. The waste gas high-efficiency and low-consumption purification system applied to industrial production according to claim 1, characterized in that: A drain port (5121) is provided at the bottom of the water collecting hopper (512). Mounting brackets (5122) are connected to the lower surfaces of the water collecting hopper (512) on both sides of the drain port (5121). A rotating shaft (5123) is commonly arranged through between the two mounting brackets (5122). An impeller (5125) is installed outside the rotating shaft (5123) between the two mounting brackets (5122). Second bearings (5124) are installed between the two ends of the rotating shaft (5123) and a mounting bracket (5122) and the side wall of the spray tower (5) respectively. One end of the rotating shaft (5123) extends out from the side wall of the spray tower (5) and is connected to a generator (5126). 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 inside the water collecting cavity (513).

8. The waste gas highly efficient and low energy consumption purification system applied to industrial production according to claim 7, characterized in that: The drain port (5121) corresponds to the position of the impeller (5125). The impeller (5125) is rotatably connected to the mounting bracket (5122) via the rotating shaft (5123). An intake valve (9) is installed at the intake pipe (1) near the spray pipe (553). The intake pipe (1) passes through the side wall of the spray tower (5) and is connected to the water collecting hopper (512), and the inner cavity of the intake pipe (1) is communicated with the water collecting cavity (513).

9. The waste gas highly efficient and low consumption purification system applied to industrial production according to claim 1, wherein: A spray assembly (55) is commonly installed inside the spray tower (5) above the two packing layers (54). The spray assembly (55) includes a circulating pump (552) installed on the upper surface of the circulating water tank (515). The water outlet of the circulating pump (552) is connected to a water pipe (551). The top of the water pipe (551) is connected to two spray pipes (553). Nozzles (554) are installed at the bottom of the spray pipes (553). Water inlet valves (555) are installed at the joints of the two spray pipes (553) and the water pipe (551).

10. The waste gas highly efficient and low consumption purification system applied to industrial production according to claim 7, characterized in that: A water storage cavity (514) is provided inside the spray tower (5) below the water collecting hopper (512). A circulating water tank (515) is connected to one side of the spray tower (5). A filter screen (516) is installed between the circulating water tank (515) and the spray tower (5). 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 (517) on one side of the processor (5171). The storage battery (5172) is electrically connected to the generator (5126) through a circuit. The liquid level sensor (5131) is electrically connected to the input end of the processor (5171) through a circuit.

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