Organic waste gas pre-treatment device and treatment method

Abstract

The application discloses a kind of organic waste gas front-end impurity removal adsorption technical field, and a kind of organic waste gas front-end treatment device and processing method, to solve the problem that manual intervention is difficult in the working process of bag filter in prior art.It includes wind box, and the upstream position in wind box is provided with primary filter plate assembly, and the downstream position in wind box is provided with multiple bag filter assembly, and multiple support partitions are provided on fixed support, and partition partition is provided on fixed support, and multiple wind covers capable of covering multiple filter bags simultaneously are buckled on the back of fixed support, and the outlet pipe is communicated on wind cover, and flow sensor and three-way electromagnetic valve are sequentially arranged on outlet pipe along air direction outlet direction.The application is used to monitor whether each bag filter assembly is in relatively normal filtering state, can be backflushed when filter plugging is more serious, is conducive to guaranteeing the service life of bag filter, and reducing replacement frequency.

Description

Technical Field

[0001] This invention relates to a pretreatment device and method for organic waste gas, belonging to the field of pretreatment adsorption technology for organic waste gas. Background Technology

[0002] Existing technologies for treating organic waste gas employ a combination of zeolite rotors and regenerative thermal oxidizers to achieve efficient absorption and treatment. To ensure the lifespan of the zeolite rotors, a pre-treatment device is installed at the front end to adsorb fine particulate matter in the organic waste gas; this is typically a multi-array bag filter. However, with continuous use, impurities accumulate in the gaps of the bag filter, affecting gas flow and increasing power consumption. There is no reliable method to assess the degree of particulate matter accumulation in the bag filter to determine whether replacement or maintenance is necessary. Furthermore, there are no suitable means to monitor filter seal failure or aging and cracking. Therefore, pre-filters are usually replaced periodically, which may extend or shorten the actual service life of the bag filter, leading to increased energy consumption or higher replacement costs. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide an organic waste gas pretreatment device and treatment method, which is used to monitor whether each bag filter component is in a relatively normal filtration state. It can perform backflushing maintenance when the filter is severely blocked, which helps to ensure the service life of the bag filter and reduce the replacement frequency.

[0004] To achieve the above objectives, the present invention employs the following technical solution:

[0005] On one hand, the present invention provides an organic waste gas pretreatment device, including a wind box. A primary filter plate assembly is arranged at the upstream position inside the wind box, and multiple sets of bag filter assemblies are arranged in an array along the extension direction of the wind box at the downstream position inside the wind box. Each set of bag filter assemblies includes multiple fixed supports spliced ​​and arranged at the cross-section of the wind box and multiple flat filter bags arranged in an array on the fixed supports. Multiple support partitions located inside the corresponding filter bags are provided on the fixed supports, and partition partitions are provided between every two adjacent filter bags on the fixed supports. Multiple hoods capable of simultaneously covering multiple filter bags are fastened to the back of the fixed supports, so that the air outlet surface of the filter bags and the hoods form a closed space. An air outlet pipe is connected to the hood. A flow sensor and a three-way solenoid valve are arranged sequentially on the air outlet pipe along the air outlet direction. Several air inlet pipes are also configured on the wind box. The three passages of the three-way solenoid valve are respectively connected to the air outlet pipe, the air inlet pipe and the inner cavity of the wind box.

[0006] Specifically, it also includes a secondary diffusion chamber, which is a flat, hollow box-shaped structure. Multiple secondary diffusion chambers are close to each other to fill the internal cross-sectional space of the box. One side of the hollow box is connected to a three-way solenoid valve, and discretely distributed air outlets are opened on the surface of the hollow box.

[0007] Specifically, inside the air box, at the air inlet position of each group of bag filter assemblies, there are multiple baffles arranged in a vertical direction. Each baffle is rotatably mounted on the air box, and a rotation drive device for driving the corresponding baffle to rotate is also provided on the outside of the air box.

[0008] Specifically, each of the baffles is provided with a rotating shaft that penetrates the outside of the bellows. Multiple rotating shafts in the same column are arranged in a straight line. Each rotating shaft is provided with a gear on its outside. The outside of the bellows is provided with a slide bar that can slide in the vertical direction. The slide bar is provided with multiple toothed plates that can contact the corresponding gears. The rotation drive device is used to drive the slide bar to slide in the vertical direction.

[0009] Specifically, the rotating shaft is a hollow tube that runs through both sides of the ventilation box. The baffle is fixedly installed on the surface of the hollow tube. Multiple heat exchange tubes are arrayed on the hollow tube along its extension direction. Each heat exchange tube is perpendicular to the corresponding baffle. The other end of all the heat exchange tubes in the same row is connected to a liquid outlet pipe. The outside of the hollow tube is connected to a cooling water supply through a rotary joint. The cooling water is discharged after passing through the heat exchange tubes and the liquid outlet pipe.

[0010] Specifically, each heat exchange tube is equipped with a flow-suppressing component, which includes a positioning sleeve fixedly installed inside the heat exchange tube and a flow-blocking plate that can slide along the axis of the heat exchange tube. The flow-blocking plate is located at the liquid inlet of the positioning sleeve and its cross-section is smaller than the cross-section inside the heat exchange tube. The positioning sleeve has a T-shaped hole that passes through the positioning sleeve. A plug-in rod is fixedly installed below the flow-blocking plate. The positioning sleeve and the flow-blocking plate are elastically connected by a spring. The plug-in rod can be inserted into a small hole below the T-shaped hole by movement.

[0011] Specifically, the connector rod is a hollow tube, and several vertically extending liquid inlet ports are provided at the bottom end of the connector rod.

[0012] Specifically, the connector rod is slidably mounted in the small hole below the T-shaped hole.

[0013] On the other hand, the present invention provides a method for pretreatment of organic waste gas, which employs the above-mentioned organic waste gas pretreatment device, and the method includes:

[0014] During initial operation, the flow rate of the corresponding air outlet pipe of each bag filter assembly per unit time is monitored, and the proportion of the flow rate of each air outlet pipe to the overall flow rate of the bag filter assembly is calculated.

[0015] The real-time monitoring device measures the ratio of the flow rate of the corresponding air outlet pipe to the flow rate of the bag filter assembly. When this ratio is lower than the initial measurement ratio multiplied by a set coefficient, or when the overall flow rate of the bag filter assembly is lower than the initial flow rate multiplied by another set coefficient, the device is selectively stopped. The backflush system is then activated via a three-way solenoid valve, allowing gas to be introduced through the air inlet pipe to backflush the bag filter assembly.

[0016] Specifically, during the backflushing process, the baffle is rotated to a downward angle, and after the backflushing is completed, the baffle is rotated to a horizontal position. Coolant is supplied into the heat exchange tube while the baffle is in a horizontal position.

[0017] Compared with the prior art, the beneficial effects achieved by the present invention are as follows:

[0018] This invention provides a hood that partially covers the filter bag at the rear end of the bag filter assembly. This allows the attenuated airflow after filtration to be recorded via the air outlet pipe at the rear of the hood. By observing the attenuation of the airflow, it is possible to determine whether the bag filter assembly is severely clogged or whether the filter itself is damaged and has failed. This facilitates easy identification of whether the bag filter needs cleaning or the corresponding filtration path needs to be closed. Furthermore, since the bag filter assembly is equipped with internal and external support partitions, air can be introduced through the inlet pipe, and the opening and closing state of the three-way valve can be changed to directly achieve backflushing of the bag filter. With the support partitions, the filter bag can remain open to prevent it from collapsing inward and blocking the backflushing airflow, making backflushing maintenance more convenient.

[0019] This invention, through the configuration of baffles and heat exchange tubes, can change the airflow direction during backflushing, preventing ash and slag from falling onto the front filter position. This avoids the ash and slag from quickly falling back onto the bag filter at that layer after re-ventilation, thus preventing accelerated clogging. During normal operation, the baffles can be adjusted to a horizontal state, and the heat exchange tubes can exchange heat with the intake air to cool it down, thereby preventing the bag filter from being heated for a long time, which would lead to accelerated aging and thus optimizing and extending the service life of the bag filter. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the pre-processing device provided in an embodiment of the present invention;

[0021] Figure 2 This is the present invention. Figure 1Enlarged view of the structure at point A of the pre-processing device provided in the embodiment;

[0022] Figure 3 This is a first-view view of the internal structure of the pre-processing device provided in an embodiment of the present invention;

[0023] Figure 4 This is a second-view view of the internal structure of the pre-processing device provided in an embodiment of the present invention;

[0024] Figure 5 This is the present invention. Figure 4 Enlarged view of the structure at point B of the pre-processing device provided in the embodiment;

[0025] Figure 6 This is a front view of the pre-processing device provided in an embodiment of the present invention;

[0026] Figure 7 This is the present invention. Figure 6 A cross-sectional view of the pre-processing device provided in the embodiment, taken in the CC direction.

[0027] Figure 8 This is the present invention. Figure 6 A DD-direction sectional view of the pre-processing device provided in the embodiment;

[0028] Figure 9 This is the present invention. Figure 7 Enlarged view of the structure at point E of the pre-processing device provided in the embodiment;

[0029] Figure 10 This is the present invention. Figure 7 Enlarged view of the structure at point F of the preprocessing device provided in the embodiment;

[0030] Figure 11 This is a cross-sectional view of the internal structure of the pre-processing device provided in an embodiment of the present invention;

[0031] Figure 12 This is the present invention. Figure 11 Enlarged view of the structure at point G of the pre-processing device provided in the embodiment;

[0032] Figure 13 This is a schematic cross-sectional view of the heat exchange tube provided in an embodiment of the present invention;

[0033] Figure 14 This is the present invention. Figure 13 Enlarged view of the structure at point H of the heat exchange tube provided in the embodiment;

[0034] Reference numerals: 1. Air box; 2. Primary filter plate assembly; 3. Bag filter assembly; 4. Air hood; 5. Air outlet pipe; 6. Flow sensor; 7. Three-way solenoid valve; 8. Secondary diffusion chamber; 9. Baffle; 10. Heat exchange tube; 11. Rotating shaft; 12. Gear; 13. Sliding bar; 14. Toothed plate; 15. Liquid outlet pipe; 16. Positioning sleeve; 17. Baffle plate; 18. Connecting rod; 19. Spring; 20. Liquid inlet; 21. Air inlet pipe. Detailed Implementation

[0035] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0036] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are used only for the convenience of describing the invention and 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, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0037] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances. Example 1

[0038] This invention provides an organic waste gas pretreatment device for monitoring whether each bag filter assembly is in a relatively normal filtration state. It allows for backflushing maintenance when the filters are severely clogged, thus extending their service life and reducing replacement frequency. To achieve the device's structural function, it includes a wind box 1. An upstream primary filter assembly 2 is located inside the wind box 1 to filter primary impurities. Downstream of the wind box 1 are multiple sets of bag filter assemblies 3 (from front to back, respectively used to adsorb particles larger than 5µm, particles between 1-5µm, and particles between 0.3-1µm) arranged along the extension direction of the wind box 1. Each bag filter assembly 3 includes multiple fixed supports spliced ​​together at the cross-section of the wind box 1 and multiple flat filter bags arranged in an array on the fixed supports. To enable the equipment to support... For backflushing the filter bags, multiple support partitions are installed on the fixed bracket, located inside the corresponding filter bags. Each filter bag has multiple support partitions to prevent the filter bags from being squeezed and contracted during backflushing, thus limiting the filtration surface. To ensure proper ventilation and filtration, partitions are installed between every two adjacent filter bags on the fixed bracket to prevent excessive local wind force from affecting the opening of other filter bags and limiting the filtration area. To monitor the working status of the filter bags and provide data on whether maintenance is needed, multiple hoods 4, capable of simultaneously covering multiple filter bags, are attached to the back of the fixed bracket. This creates a closed space between the air outlet surface of the filter bags and the hoods 4. An air outlet pipe 5 is connected to the hood 4, and a flow sensor 6 and a three-way solenoid valve 7 are arranged sequentially along the airflow direction on the air outlet pipe 5. Figure 12As shown, several air inlet pipes 21 are also configured on the air box 1 so that the three passages of the three-way solenoid valve 7 are respectively connected to the air outlet pipe 5, the air inlet pipe 21 and the inner cavity of the air box 1. Through the above configuration, the flow sensor 6 can monitor the ventilation volume of the corresponding filter bag and make a real-time judgment based on the decrease in air volume before and after use. This allows it to determine whether the corresponding filter bag position is severely blocked and provides data for whether the equipment needs backflushing maintenance. Backflushing maintenance can be performed directly when the bag filter is severely blocked, which can effectively extend the replacement cycle of the bag filter assembly 3, reduce the equipment's air resistance in a timely manner, ensure the effective power of the equipment, thereby reducing the equipment's operating costs. It is also beneficial for monitoring the aging of the filter bags (such as a sudden abnormal increase in air volume, which may be caused by aging, cracking or seal damage of the filter bags). For filter bags that are malfunctioning, when other filter bags are working normally, only the passage of the corresponding three-way solenoid valve 7 can be closed to achieve the failure of that filter surface position, thus ensuring that each bag filter assembly 3 can still work normally in the event of a failure. In the above embodiments, considering the need for easy replacement of the bag filter when it reaches the end of its service life, the hood 4 can be fixedly installed inside the air box 1, while the corresponding bag filter assembly 3 can be detached and installed on the hood 4. This eliminates the need for additional removal and installation of the hood 4, facilitating manual replacement. In some other embodiments, considering the removal of backflushing ash particles, several exhaust pipes can be configured on the air box 1 to blow away the discharged particles in conjunction with the blowing action, reducing the ash particle content in the air box 1. This prevents these particles from re-adhering to the surface of the filter bag after normal ventilation, thus avoiding rapid re-clogging of the filter bag.

[0039] The organic waste gas pretreatment device provided in this embodiment of the invention, if the exhaust pipe 5 directly exhausts gas to the rear end of the air box 1, then it can be considered that the air source of the exhaust pipe 5 is more concentrated. This causes the air source to be concentrated in a local area of ​​the bag filter assembly 3 at the rear end, resulting in the filtration of airborne ash and slag in a local position of the rear filter or zeolite rotor, causing the adsorption at the rear end to not occur evenly, affecting the actual adsorption surface area at the rear end. In order to balance this filtration effect and ensure an effective and comprehensive adsorption area, the device here also includes a secondary diffusion chamber 8, and the secondary diffusion chamber 8 is configured as a flat hollow box shape, such as... Figure 5As shown, multiple secondary diffusion chambers 8 are close to each other to fill the internal cross-sectional space of the air box 1. One side of the hollow box is connected to a three-way solenoid valve 7, and discretely distributed air outlets are opened on the surface of the hollow box. With this arrangement, after the gas passes through the air outlet pipe 5, it is dispersed and distributed in the internal space of the air box 1 by the air outlet, realizing a relatively uniform secondary distribution of gas in the chamber. This is conducive to effective and uniform absorption by the rear adsorption surface, ensuring the adsorption efficiency of ash particles.

[0040] This invention provides an organic waste gas pretreatment device. During backflushing of the bag filter, the airflow direction causes the backflushed ash particles to easily adhere to the front-end bag filter or pre-filter. Since the front-end bag filter is also undergoing backflushing, the dust particles move upwards layer by layer, resulting in inefficient dust removal. Under normal operating conditions, these particles easily move back to the corresponding layer of the bag filter, causing blockage. Therefore, multiple vertically arranged baffles 9 are installed at the air inlet of each bag filter assembly 3 inside the air box 1, and each baffle 9 is designed to rotate. The baffle 9 is mounted on the air box 1, and a rotation drive device is also provided on the outside of the air box 1 to drive the corresponding baffle 9 to rotate. The specific driving method is not limited here. With the above configuration, when the air box 1 is filtering gas normally, the baffle 9 is rotated to make it parallel to the direction of airflow, so as to avoid generating large air resistance. When backflushing, the baffle 9 is rotated so that its face is downward, tilting and guiding the reverse air source, so as to avoid the airflow being blown into the upstream filter equipment. That is, by guiding the airflow, dust is prevented from being reverse-adsorbed. At this time, the gas containing ash particles can be discharged by combining with the above-mentioned air extraction component, so as to achieve a certain degree of cleanliness in the air box 1 and ensure the efficiency of reverse cleaning. As a preferred driving method, each baffle 9 can be equipped with a rotating shaft 11 that penetrates the outside of the air box 1, as per the configuration. Figure 2 As shown, multiple rotating shafts 11 in the same column are arranged in a straight line. Each rotating shaft 11 is equipped with a gear 12 on its outside. A slide bar 13 that can slide in the vertical direction is provided on the outside of the bellows 1. Multiple toothed plates 14 that can contact the corresponding gears 12 are provided on the slide bar 13. At this time, a rotation drive device is configured to drive the slide bar 13 to slide in the vertical direction, which can drive multiple meshing gears 12 to rotate, thereby realizing the adjustment of the angle of the baffle 9 inside the bellows 1.

[0041] In some other embodiments of the organic waste gas pretreatment device provided by this invention, to further extend the service life of the bag filter assembly 3, the aging rate of the bag filter can be reduced by cooling the gas. Specifically, the rotating shaft 11 can be configured as a hollow tube, with the hollow tube extending through both sides of the ventilation box 1. The aforementioned baffle 9 is fixedly installed on the surface of the hollow tube to rotate with it. Simultaneously, multiple heat exchange tubes 10 are arrayed along the extension direction of the hollow tube, each heat exchange tube 10 being perpendicular to its corresponding baffle 9. When the baffle 9 is in a horizontal state, the heat exchange tube 10 can be in a vertical state, forming a maximum heat exchange surface with the passing gas. In order to reduce the temperature of the gas, the heat exchange tube 10 is cooled by flushing coolant inside it. In order to achieve effective liquid flow, the other end of all heat exchange tubes 10 in the same row is connected to a liquid outlet pipe 15. At this time, the outside of the hollow tube is connected to a cooling water supply through a rotary joint. The cooling water is discharged after passing through the heat exchange tubes 10 and the liquid outlet pipe 15, so that the coolant can flow out through multiple heat exchange tubes 10 and cool the gas by contacting the gas for heat exchange. This cooling method prevents water vapor from being generated inside the air box 1, thus avoiding water vapor blockage of the filter belt mesh. It achieves closed-loop heat exchange and cooling, thereby reducing the aging rate of the filter bag and helping to extend its service life. Since the liquid outlet pipe 15 rotates with the heat exchange pipe 10, the liquid outlet can be connected to the outer wall of the air box 1 using a flexible hose. The liquid is circulated out through the hose and can be connected to a chiller to cool the liquid, ensuring that the liquid inlet can introduce low-temperature liquid and achieve efficient heat exchange.

[0042] This invention provides an organic waste gas pretreatment device. The aforementioned multiple heat exchange tubes 10 all require the flow of coolant to ensure effective heat exchange surface. However, the liquid is affected by resistance within the tubes, easily leading to uneven flow velocity in each tube, which results in lower-than-expected actual heat exchange efficiency. To reduce this uneven flow velocity, a flow-suppressing component is installed in each heat exchange tube 10, such as... Figure 14As shown, the flow-suppressing assembly includes a positioning sleeve 16 fixedly installed inside the heat exchange tube 10 and a flow-blocking plate 17 that can slide along the axis of the heat exchange tube 10. The flow-blocking plate 17 is located at the liquid inlet of the positioning sleeve 16 and its cross-section is smaller than the cross-section inside the heat exchange tube 10, so that the liquid can flow through the side of the flow-blocking plate 17. At this time, a T-shaped hole is opened on the positioning sleeve 16, and a plug-in rod 18 is fixedly installed below the flow-blocking plate 17. The positioning sleeve 16 and the flow-blocking plate 17 are elastically connected by a spring 19, so that the plug-in rod 18 can be inserted into the small hole below the T-shaped hole by movement. With the above configuration, if the flow velocity of the corresponding heat exchange tube 10 is too high, the excessive flow velocity will generate a large pressure on the baffle plate 17. This pressure overcomes the resistance and causes the plug rod 18 to be inserted into the small hole opened in the positioning sleeve 16, thereby reducing the liquid passage area or directly blocking the liquid path, thus suppressing the flow. After the flow rate decreases, the baffle plate 17 loses its impact force, and the spring force of the spring 19 will bounce the baffle plate 17 up, expanding the flow rate again, thus forming an intermittent flow state. This can avoid the situation where the flow velocity of the local heat exchange tube 10 is too high, resulting in the flow velocity of other pipes being too low. In some other reasonable configurations, the spring 19 should be able to form a balance with the impact force, thereby reducing the flow rate difference between different heat exchange tubes 10. After balancing the flow rate difference, the coolant distribution in the heat exchange tube 10 will also be more balanced, which is conducive to achieving efficient heat exchange over a large area. As a preferred design, the connector rod 18 can also be configured as a hollow tube. In this case, several vertically extending liquid inlet slots 20 are provided at the bottom of the connector rod 18. These slots can be moved up and down to change the liquid flow area. Compared to the smaller liquid flow area of ​​the T-shaped hole, this provides more flexible linear adjustment. The lower the liquid inlet slot 20 moves, the smaller the liquid surface area, thus suppressing flow and making it easier to achieve a balance with the spring 19. This also avoids surge caused by the reciprocating movement of the baffle plate 17, which helps reduce noise. With this configuration, the connector rod 18 can be directly slidably mounted in the small hole below the T-shaped hole, using the connector rod 18 itself to guide the baffle plate 17 vertically, thus simplifying the structure. Example 2

[0043] The present invention provides a method for pretreatment of organic waste gas, which uses any one of the organic waste gas pretreatment devices in Embodiment 1, and the method includes:

[0044] During the initial operation, the flow rate of the corresponding air outlet pipe 5 of each group of bag filter assembly 3 per unit time is monitored, and the proportion of the flow rate of each air outlet pipe 5 to the overall flow rate of the group of bag filter assembly 3 is calculated.

[0045] The real-time monitoring device compares the flow rate of the corresponding air outlet pipe 5 with the flow rate of the bag filter assembly 3. When the ratio is lower than the initial ratio multiplied by a set coefficient (which can be set according to actual needs); or when the overall flow rate of the bag filter assembly 3 is lower than the initial overall flow rate multiplied by another set coefficient (which can be set according to actual needs), the device is selectively stopped. The backflush system is then activated by the three-way solenoid valve 7, and gas is introduced through the air inlet pipe 21 to backflush the bag filter assembly 3.

[0046] This method allows for the acquisition of ventilation volumes for different cell hoods 4, monitoring their operational status and obtaining corresponding parameters. This provides a valid reference for determining whether equipment maintenance is required. In unforeseen circumstances, if the internal bag filter assembly 3 experiences sealing failure or aging damage, the flow rate of the corresponding outlet pipe 5 will increase sharply. Closing the corresponding three-way solenoid valve 7 can prevent the entire filter assembly from failing, ensuring the normal operation of other filter assemblies and guaranteeing stable equipment operation. During backflushing, the baffle 9 can be rotated to a downward angle. After backflushing, the baffle 9 is rotated to a horizontal position. When the baffle 9 is horizontal, coolant is supplied to the heat exchange tube 10. By providing a cooling medium, the gas to be filtered is cooled, thereby reducing the temperature of the bag filter and helping to slow down its aging and failure rate, thus extending its service life.

[0047] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. An organic exhaust gas pre-treatment device, characterized by comprising: The utility model provides a kind of cloth bag filter assembly, including wind box (1), the upstream position of the inside of wind box (1) is provided with primary efficiency filter plate assembly (2), the downstream position of the inside of wind box (1) is provided with multiple groups cloth bag filter assembly (3) along the array of wind box (1) extension direction, each cloth bag filter assembly (3) includes multiple fixed supports that are spliced and arranged in the cross-sectional position of wind box (1) and multiple flat filter bags that are arrayed and arranged on fixed support, multiple support partitions are arranged in the inside of corresponding filter bag on fixed support, and partition is arranged between every two adjacent filter bags on fixed support, the back of fixed support is buckled with multiple wind covers (4) that can cover multiple filter bags simultaneously, so that the air outlet surface of filter bag and wind cover (4) form closed space, the air outlet pipe (5) is communicated and arranged on wind cover (4), flow sensor (6) and three-way electromagnetic valve (7) are sequentially arranged on air outlet pipe (5) along air direction, wind box (1) is also provided with several air inlet pipes (21), the three passages of three-way electromagnetic valve (7) are communicated with air outlet pipe (5), air inlet pipe (21) and the inner cavity of wind box (1) respectively; Multiple baffles (9) are arranged in vertical direction at the air inlet position of each cloth bag filter assembly (3) in the inside of wind box (1), each baffle (9) is rotatably arranged on wind box (1), and the outside of wind box (1) is also provided with rotating drive device for driving corresponding baffle (9) to rotate; Each baffle (9) is provided with rotating shaft (11) penetrating the outside of wind box (1), multiple rotating shafts (11) in the same column are distributed in a straight line, each rotating shaft (11) is provided with gear (12) outside, the outside of wind box (1) is provided with sliding bar (13) that can slide in vertical direction, the sliding bar (13) is provided with multiple toothed plates (14) that can contact corresponding gear (12), and the rotating drive device is used to drive the sliding bar (13) to slide in vertical direction; The rotating shaft (11) is a hollow pipe, and the hollow pipe penetrates both sides of the wind box (1), the baffle (9) is fixedly arranged on the surface of the hollow pipe, and multiple heat exchange pipes (10) are installed on the hollow pipe in the extension direction of the hollow pipe, each heat exchange pipe (10) is perpendicular to the corresponding baffle (9), and the other end of all heat exchange pipes (10) in the same row is communicated with liquid outlet pipe (15), and the outside of the hollow pipe is communicated with refrigerated water source through a rotary joint, and the refrigerated water source is discharged after passing through the heat exchange pipe (10) and the liquid outlet pipe (15).

2. The organic waste gas pre-treatment device according to claim 1, characterized in that, It also includes secondary diffusion air chamber (8), the secondary diffusion air chamber (8) is overall flat hollow box shape, and multiple secondary diffusion air chambers (8) are close to each other to fill the cross-sectional space in the inside of wind box (1), wherein one side of the hollow box is communicated with three-way electromagnetic valve (7), and the surface of the hollow box is provided with discrete distribution air outlet.

3. The organic waste gas pre-treatment device according to claim 2, characterized in that, Each of the heat exchange pipes (10) is provided with a flow suppressing assembly, the flow suppressing assembly comprises a positioning sleeve (16) fixedly arranged inside the heat exchange pipe (10) and a flow blocking plate (17) capable of sliding along the axial direction of the heat exchange pipe (10), the flow blocking plate (17) is located at the liquid inlet position of the positioning sleeve (16) and the cross section is smaller than the inner cross section of the heat exchange pipe (10), a T-shaped hole penetrating through the positioning sleeve (16) is formed in the positioning sleeve (16), a plug-in rod (18) is fixedly arranged below the flow blocking plate (17), the positioning sleeve (16) and the flow blocking plate (17) are elastically connected through a spring (19), and the plug-in rod (18) can be inserted into the small hole below the T-shaped hole by moving.

4. The organic waste gas pre-treatment device according to claim 3, characterized in that, The plug-in rod (18) is a hollow tubular structure, and a plurality of liquid inlet notches (20) extending in the vertical direction are formed at the bottom end position of the plug-in rod (18).

5. The organic waste gas pre-treatment device according to claim 4, characterized in that, The plug-in rod (18) is slidingly arranged in the small hole below the T-shaped hole.

6. An organic waste gas pre-treatment method, characterized by, The organic waste gas pre-treatment device of claim 5 comprises a method, which comprises: During initial operation, the flow rate of each corresponding outlet pipe (5) per unit time of each bag filter assembly (3) is monitored, and the proportion of the flow rate of each outlet pipe (5) relative to the overall flow rate of the bag filter assembly (3) is calculated; Real-time monitoring of the proportion of the flow rate of the corresponding outlet pipe (5) relative to the flow rate of the bag filter assembly (3) is performed, and when the proportion is lower than the proportion of the initial detection multiplied by a set coefficient, or the overall flow rate of the bag filter assembly (3) is lower than the overall flow rate of the initial operation multiplied by another set coefficient, the device is selectively stopped, the back flushing system is opened through the three-way electromagnetic valve (7), and the bag filter assembly (3) is back flushed by the gas introduced through the inlet pipe (21); During the back flushing process, the baffle (9) is rotated to a downward inclined position, and after the back flushing is completed, the baffle (9) is rotated to a horizontal state, and when the baffle (9) is in the horizontal state, the cooling liquid is supplied into the heat exchange pipe (10).

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