Organic waste gas pretreatment device and treatment method

Abstract

The invention discloses an organic waste gas pretreatment device and treatment method in the technical field of organic waste gas early-stage impurity removal and adsorption, and aims to solve the problem that in the prior art, the working process of a cloth bag type filter is difficult to intervene manually. The device comprises an air bellow, a primary filter plate assembly is arranged at the upstream position in the air bellow, a plurality of cloth bag type filter assemblies are arranged at the downstream position in the air bellow, a plurality of supporting partition plates are arranged on a fixing support, partition partition plates are arranged on the fixing support, and a plurality of fan covers capable of covering a plurality of filter bags at the same time are arranged on the back face of the fixing support in a buckled mode. An air outlet pipe is arranged on the fan cover in a communicating mode, and a flow sensor and a three-way electromagnetic valve are sequentially arranged on the air outlet pipe in the air outlet direction. The bag type filter is used for monitoring whether each bag type filter assembly is in a relatively normal filtering state or not, and can be subjected to back flushing maintenance when the filter is seriously blocked, so that the service life of the bag type filter is guaranteed, and the replacement frequency is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to an organic waste gas pre-treatment device and treatment method, belonging to the technical field of organic waste gas pre-removal adsorption. BACKGROUND

[0002] The prior art process relates to the treatment of organic waste gas, which adopts the combination of zeolite rotating wheel and regenerative incinerator to realize efficient absorption and treatment of organic waste gas. In order to protect the service life of the zeolite rotating wheel, a pre-treatment device is arranged at the front end to adsorb fine particles in the organic waste gas. Usually, a plurality of arrayed bag-type dust collectors are arranged. However, with continuous use, impurities will continuously accumulate in the gaps of the bag-type dust collector, affecting the gas inlet effect and increasing the power consumption of the equipment. However, there is no good way to determine whether the bag-type dust collector needs to be replaced or maintained according to the accumulation degree of the particles attached to the bag-type dust collector. In addition, there is no suitable means to monitor the sealing failure or aging cracking of the filter. Therefore, the pre-filter in the equipment is usually replaced regularly, which may prolong or shorten the actual service life of the bag-type dust collector, resulting in increased energy consumption of the equipment or increased replacement cost. SUMMARY

[0003] The present application aims to overcome the shortcomings of the prior art and provide an organic waste gas pre-treatment device and treatment method for monitoring whether each bag-type filter assembly is in a relatively normal filtering state. The filter can be back-flushed and maintained when the filter plugging is more serious, which is beneficial to protecting the service life of the bag-type filter and reducing the replacement frequency.

[0004] To achieve the above-mentioned purpose, the present application adopts the following technical scheme: On the one hand, the present application provides an organic waste gas pre-treatment device, which comprises a wind box. An initial efficiency filter plate assembly is arranged at an upstream position inside the wind box. A plurality of groups of bag-type filter assemblies are arranged in an array along the extension direction of the wind box at a downstream position inside the wind box. Each group of bag-type filter assemblies comprises a plurality of fixed supports arranged in splicing at the cross-sectional position of the wind box and a plurality of flat filter bags arranged in an array on the fixed supports. A plurality of support partitions are arranged inside the corresponding filter bags on the fixed supports. A partition partition is arranged between each two adjacent filter bags on the fixed supports. A plurality of air hoods capable of covering a plurality of filter bags at the same time are buckled on the back of the fixed support, so that the air outlet surface of the filter bag and the air hood form a closed space. An air outlet pipe is communicatively arranged on the air hood. A flow sensor and a three-way electromagnetic valve are arranged in sequence on the air outlet pipe along the air outlet direction. A plurality of air inlet pipes are arranged on the wind box. The three-way electromagnetic valve is connected to the air outlet pipe, the air inlet pipe and the inner cavity of the wind box, respectively.

[0005] Specifically, the secondary diffusion air chamber is in the shape of a flat hollow box, and a plurality of secondary diffusion air chambers are close to each other to fill the internal cross-sectional space of the air chamber, wherein one side of the hollow box is in communication with the three-way electromagnetic valve, and a plurality of air outlets are arranged on the surface of the hollow box.

[0006] Specifically, a plurality of baffle plates arranged in the vertical direction are arranged at the air inlet position of each group of bag filter assemblies in the air chamber, each baffle plate is rotationally arranged on the air chamber, and a rotating driving device for driving the rotation of the corresponding baffle plate is further arranged outside the air chamber.

[0007] Specifically, a rotating shaft penetrating through the outside of the air chamber is arranged on each baffle plate, a plurality of rotating shafts in the same vertical column are arranged in a straight line, a gear is arranged outside each rotating shaft, a slide bar capable of sliding in the vertical direction is arranged on the outside of the air chamber, a plurality of toothed plates capable of contacting the corresponding gears are arranged on the slide bar, and the rotating driving device is used to drive the slide bar to slide in the vertical direction.

[0008] Specifically, the rotating shaft is a hollow pipe, the hollow pipe penetrates through both sides of the air chamber, the baffle plate is fixedly arranged on the surface of the hollow pipe, a plurality of heat exchange pipes are arranged on the hollow pipe in the extension direction of the hollow pipe, each heat exchange pipe is perpendicular to the corresponding baffle plate, and one end of all the heat exchange pipes in the same row is in communication with a liquid outlet pipe.

[0009] Specifically, a flow suppression assembly is arranged in each heat exchange pipe, the flow suppression assembly comprises a positioning sleeve fixedly arranged in the heat exchange pipe and a flow resistance plate capable of sliding along the axis of the heat exchange pipe, the flow resistance plate is located at the liquid inlet position of the positioning sleeve and has a cross section smaller than the inner cross section of the heat exchange pipe, a T-shaped hole penetrating through the positioning sleeve is arranged on the positioning sleeve, a plug-in rod is fixedly arranged below the flow resistance plate, the positioning sleeve and the flow resistance plate are elastically connected through a spring, and the plug-in rod can be inserted into a small hole below the T-shaped hole by moving.

[0010] Specifically, the plug-in rod is in the shape of a hollow pipe, and a plurality of liquid inlet grooves extending in the vertical direction are arranged at the bottom end position of the plug-in rod.

[0011] Specifically, the plug-in rod is slidingly arranged in the small hole below the T-shaped hole.

[0012] On the other hand, the present application provides a method for pre-treating organic waste gas, which uses the organic waste gas pre-treatment device described above, and the method comprises the following steps: Monitor the flow rate of the corresponding air outlet pipe per unit time of each cloth bag filter assembly during initial operation, and calculate the proportion of the flow rate of each air outlet pipe relative to the overall flow rate of the cloth bag filter assembly; Real-time monitor the proportion of the flow rate of the corresponding air outlet pipe relative to the flow rate of the cloth bag filter assembly in the device, and selectively stop the device when the proportion is lower than the proportion during initial detection multiplied by a set coefficient, or the overall flow rate of the cloth bag filter assembly is lower than the overall flow rate during initial operation multiplied by another set coefficient, open the back blowing system through the three-way electromagnetic valve, and blow air into the cloth bag filter assembly through the air inlet pipe.

[0013] Specifically, during back blowing, the baffle is rotated to a downward inclined position, and after back blowing is completed, the baffle is rotated to a horizontal state, and cooling liquid is supplied into the heat exchange pipe when the baffle is in the horizontal state.

[0014] Compared with the prior art, the present application has the following beneficial effects: The present application sets a wind cover capable of locally covering the cloth bag at the rear end of the cloth bag filter assembly, so that the wind force after the filtering action of the corresponding unit can be counted through the air outlet pipe at the rear end of the wind cover, thereby determining whether the corresponding cloth bag filter assembly has been blocked more seriously or whether the filter itself has been damaged to cause filtering failure, so that it can be determined whether the cloth bag filter needs to be cleaned or the corresponding filtering passage needs to be closed. Due to the setting of the inner and outer support partitions of the cloth bag filter assembly, the back blowing action of the cloth bag filter can be directly realized by changing the opening and closing state of the three-way valve through the air inlet pipe. Under the action of the support partition, the cloth bag can maintain an open state to avoid inward indentation to block the back blowing air, and direct back blowing action maintenance is more convenient. By setting the baffle and the heat exchange pipe, the wind direction can be changed during back blowing to avoid the ash and slag of the back blowing air falling on the front filter position, thereby avoiding the ash and slag falling again on the cloth bag filter at this layer position after ventilation again to accelerate the blockage. During normal operation, the baffle can be adjusted to a horizontal state, and the heat exchange pipe can heat exchange and cool the inlet air, thereby avoiding the aging speed of the cloth bag increasing due to long-term heating, thereby optimizing and prolonging the service life of the cloth bag filter. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is the overall structure schematic diagram of the pre-treatment device provided by the embodiment of the present application; Figure 2 is the overall structure schematic diagram of the pre-treatment device provided by the embodiment of the present application; Figure 1 Figure 3 ​is a first perspective view of the internal structure of the pre-processing device provided by the embodiment of the present application; Figure 4 is a second perspective view of the internal structure of the pre-processing device provided by the embodiment of the present application; Figure 5 is a B structure enlarged view of the pre-processing device provided by the embodiment of the present application; Figure 4 Figure 6 is a front view of the pre-processing device provided by the embodiment of the present application; Figure 7 is a C-C direction sectional view of the pre-processing device provided by the embodiment of the present application; Figure 6 Figure 8 is a D-D direction sectional view of the pre-processing device provided by the embodiment of the present application; Figure 6 Figure 9 is an E structure enlarged view of the pre-processing device provided by the embodiment of the present application; Figure 7 Figure 10 is an F structure enlarged view of the pre-processing device provided by the embodiment of the present application; Figure 7 Figure 11 is a sectional view of the internal structure of the pre-processing device provided by the embodiment of the present application; Figure 12 is a G structure enlarged view of the pre-processing device provided by the embodiment of the present application; Figure 11 Figure 13 is a sectional structure schematic view of the heat exchange pipe provided by the embodiment of the present application; Figure 14 is an H structure enlarged view of the heat exchange pipe provided by the embodiment of the present application; Figure 13 Reference signs: 1, wind box; 2, primary efficiency filter plate assembly; 3, cloth bag type filter assembly; 4, wind cover; 5, air outlet pipe; 6, flow sensor; 7, three-way electromagnetic valve; 8, secondary diffusion air chamber; 9, baffle; 10, heat exchange pipe; 11, rotating shaft; 12, gear; 13, sliding bar; 14, toothed plate; 15, liquid outlet pipe; 16, positioning sleeve; 17, resistance plate; 18, plug-in rod; 19, spring; 20, liquid inlet notch; 21, air inlet pipe. DETAILED DESCRIPTION

[0016] The present application will be further described below in conjunction with the drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and cannot be used to limit the protection scope of the present application.

[0017] ​​​​​​​In the description of the application, it is to be understood by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, only for the convenience of describing the application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application. In addition, the terms "first", "second" and the like are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second" and the like can explicitly or implicitly include one or more of the features. In the description of the application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0018] In the description of the application, it should be noted that, unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances. Example one

[0019] The embodiment of the present application provides a kind of organic waste gas pre-treatment device, for monitoring each bag filter assembly whether in relatively normal filtering state, can carry out back blow maintenance when filter plugging is more serious, it is favorable to guarantee the service life of bag filter, reduce replacement frequency, to realize the structure and function of device, here setting device includes windbox 1, wherein the upstream position in windbox 1 is provided with primary filter plate assembly 2, for filtering primary impurities, downstream position in windbox 1 is provided with multiple groups of bag filter assembly 3 (from front end to rear end, respectively for adsorbing particle size greater than 5um, particle size between 1-5um and particle size between 0.3-1um particle) along the extension direction of windbox 1, configure each bag filter assembly 3 includes multiple fixed supports spliced and arranged in the cross section position of windbox 1 and multiple flat filter bags arranged in array on fixed support, to be able to let equipment support back blow of filter bag, here multiple support partitions located in the inside of corresponding filter bag are provided on fixed support, that is, each filter bag has multiple support partitions, so that back blow of filter bag can be avoided when reverse extrusion shrinkage, leading to limited filter surface, to normally realize the ventilation filtering of filter bag, here the partition partition is provided on fixed support between every two adjacent filter bags, for preventing the influence of other filter bags caused by excessive local wind force to open, limit filter surface area, and to realize the monitoring of filter bag working state in working, so as to provide corresponding data basis whether need to carry out maintenance, here multiple wind covers 4 capable of covering multiple filter bags simultaneously are buckled on the back of fixed support, to make the outlet face of filter bag and wind cover 4 form closed space, simultaneously, outlet pipe 5 is communicated and arranged on wind cover 4, flow sensor 6 and three-way electromagnetic valve 7 are sequentially arranged on outlet pipe 5 along wind direction outlet direction, as Figure 12The three-way electromagnetic valve 7 is connected to the air outlet pipe 5, the air inlet pipe 21 and the inner cavity of the air bellow 1 respectively. Through the above setting mode, the flow sensor 6 can monitor the ventilation volume of the corresponding filter bag, and can judge the ventilation volume before and after use in real time, so as to obtain whether the corresponding filter bag position is blocked seriously, and provide data basis for whether the equipment needs to be maintained by back blowing. When the bag filter is blocked seriously, the bag filter can be directly maintained by back blowing, the replacement cycle of the bag filter assembly 3 can be effectively prolonged, the wind resistance of the equipment can be reduced in time, the effective power of the equipment can be ensured, the operation cost of the equipment can be reduced, and the aging of the bag can be monitored (for example, the wind volume suddenly increases, which may be caused by aging, cracking or sealing damage of the bag). For the bag that works abnormally, the corresponding three-way electromagnetic valve 7 can be closed when other bags work normally, so that the filter surface position is invalid, and the bag filter assembly 3 can still work normally when a fault occurs. In the above embodiment, in order to facilitate replacement when the bag filter reaches the service life, the air bellow 4 can be fixedly arranged in the air bellow 1, and the corresponding bag filter assembly 3 can be detachably arranged on the air bellow 4, so that the air bellow 4 does not need to be additionally taken out and installed, and the replacement operation of the person is facilitated. In some other embodiments, in order to remove the back blowing ash particles, a plurality of air exhaust pipes can be arranged on the air bellow 1, which are used in combination with the blowing action to blow off the discharged particles, so as to reduce the content of the ash particles in the air bellow 1, thereby avoiding that the particles adhere to the surface of the filter bag again after normal ventilation, and causing the filter bag to be quickly blocked again.

[0020] The organic waste gas pre-treatment device provided by the embodiment of the application can be considered as a more concentrated air source of the air outlet pipe 5, which causes the air source to concentrate in a local area of the bag filter assembly 3 at the rear end, and causes the ash in the air to be adsorbed in the local position of the rear-end filter or zeolite runner, so that the adsorption of the rear end cannot be uniformly performed, and the actual adsorption area of the rear end is affected. In order to balance the filtering effect and ensure the effective and comprehensive adsorption area, the device further comprises a secondary diffusion air chamber 8, and the secondary diffusion air chamber 8 is in the form of a flat hollow box body. Figure 5As shown, the plurality of secondary diffusion air chambers 8 are close to each other to fill the internal cross-sectional space of the air box 1, wherein one side of the hollow box body is in communication with the three-way electromagnetic valve 7, and a plurality of gas outlets are arranged on the surface of the hollow box body. Through this arrangement, the gas is dispersed and distributed in the internal space of the air box 1 after passing through the gas outlet pipe 5, realizing the secondary relatively uniform distribution of the gas in the chamber, thereby facilitating the effective and uniform absorption of the downstream adsorption surface, and ensuring the adsorption efficiency of the ash particles.

[0021] The organic waste gas pre-treatment device provided by the embodiment of the present application can solve the problem that the ash particles are easily blown and attached to the front bag filter or the primary filter due to the wind direction problem when the bag filter is back-flushed, and the ash particles are moved to the upper layer layer by layer due to the back-flushing of the front bag filter, which leads to low efficiency of dust cleaning. In the normal working state, the particles are easily moved to the corresponding layer of the bag filter to form a blockage. To this end, a plurality of baffles 9 arranged in the vertical direction are arranged at the air inlet position of each group of bag filter assemblies 3 inside the air box 1, and each baffle 9 is rotatably arranged on the air box 1. Meanwhile, a rotating driving device for driving the corresponding baffle 9 to rotate is arranged outside the air box 1. The specific driving means is not limited here. Through the above arrangement, when the air box 1 normally filters the gas, the rotating baffle 9 is parallel to the blowing direction of the wind, avoiding a large wind resistance. When back-flushing, the rotating baffle 9 is faced downward to tilt the direction of the reverse air source, avoiding the dust being adsorbed in the upstream filter device, that is, by guiding the wind direction to avoid the dust being adsorbed in the reverse direction. At this time, the gas containing ash particles can be discharged by combining the above-mentioned air extraction assembly, realizing a certain degree of cleanliness in the air box 1 and ensuring the efficiency of reverse cleaning. As a preferred driving mode, a rotating shaft 11 penetrating the outside of the air box 1 can be arranged on each baffle 9. The configuration is as follows Figure 2 As shown, the plurality of rotating shafts 11 in the same column are arranged in a straight line, and each rotating shaft 11 is provided with a gear 12. A slide bar 13 capable of sliding in the vertical direction is arranged on the outside of the air box 1, and a plurality of toothed plates 14 capable of contacting the corresponding gears 12 are arranged on the slide bar 13. At this time, the rotating driving device is configured to drive the slide bar 13 to slide in the vertical direction, that is, to drive the plurality of meshing gears 12 to rotate, thereby adjusting the angle of the baffle 9 in the air box 1.

[0022] The organic waste gas pre-treatment device provided by the embodiment of the application can further prolong the service life of the bag filter assembly 3 by reducing the aging rate of the bag filter through gas cooling in some other embodiments. Specifically, the rotating shaft 11 can be configured as a hollow pipe, and the hollow pipe penetrates through both sides of the air bellow 1. The baffle 9 is fixedly arranged on the surface of the hollow pipe and rotates with the hollow pipe. In addition, a plurality of heat exchange pipes 10 are arranged on the hollow pipe in the extension direction of the hollow pipe. Each heat exchange pipe 10 is perpendicular to the corresponding baffle 9. When the baffle 9 is in a horizontal state, the heat exchange pipe 10 can be in a vertical state to form the largest heat exchange surface with the passing gas. In order to reduce the temperature of the gas, the cooling liquid is injected into the heat exchange pipe 10 to cool the heat exchange pipe 10. In order to realize the effective flow of the liquid, the other end of all the heat exchange pipes 10 in the same row is communicated with the liquid outlet pipe 15. At this time, the outside of the hollow pipe is communicated with the refrigeration water source through the rotary joint. The refrigeration water source is discharged after passing through the heat exchange pipe 10 and the liquid outlet pipe 15. The cooling liquid can flow out through the plurality of heat exchange pipes 10 and reduce the temperature of the gas through heat exchange with the gas. This cooling method can not cause water vapor to block the mesh of the filter belt in the air bellow 1, can realize closed heat exchange cooling to reduce the aging rate of the filter bag, and is helpful to prolong the service life of the filter bag. The liquid outlet pipe 15 rotates with the heat exchange pipe 10, so the liquid outlet position can be connected to the outer wall of the air bellow 1 through a hose. The liquid can be cooled through the communication with the cold water machine to ensure that the liquid inlet position can introduce low-temperature liquid to realize efficient heat exchange.

[0023] The organic waste gas pre-treatment device provided by the embodiment of the application can further prolong the service life of the bag filter assembly 3 by reducing the aging rate of the bag filter through gas cooling in some other embodiments. Specifically, the rotating shaft 11 can be configured as a hollow pipe, and the hollow pipe penetrates through both sides of the air bellow 1. The baffle 9 is fixedly arranged on the surface of the hollow pipe and rotates with the hollow pipe. In addition, a plurality of heat exchange pipes 10 are arranged on the hollow pipe in the extension direction of the hollow pipe. Each heat exchange pipe 10 is perpendicular to the corresponding baffle 9. When the baffle 9 is in a horizontal state, the heat exchange pipe 10 can be in a vertical state to form the largest heat exchange surface with the passing gas. In order to reduce the temperature of the gas, the cooling liquid is injected into the heat exchange pipe 10 to cool the heat exchange pipe 10. In order to realize the effective flow of the liquid, the other end of all the heat exchange pipes 10 in the same row is communicated with the liquid outlet pipe 15. At this time, the outside of the hollow pipe is communicated with the refrigeration water source through the rotary joint. The refrigeration water source is discharged after passing through the heat exchange pipe 10 and the liquid outlet pipe 15. The cooling liquid can flow out through the plurality of heat exchange pipes 10 and reduce the temperature of the gas through heat exchange with the gas. This cooling method can not cause water vapor to block the mesh of the filter belt in the air bellow 1, can realize closed heat exchange cooling to reduce the aging rate of the filter bag, and is helpful to prolong the service life of the filter bag. The liquid outlet pipe 15 rotates with the heat exchange pipe 10, so the liquid outlet position can be connected to the outer wall of the air bellow 1 through a hose. The liquid can be cooled through the communication with the cold water machine to ensure that the liquid inlet position can introduce low-temperature liquid to realize efficient heat exchange. Figure 14As shown, the flow control assembly is configured to include a positioning sleeve 16 fixedly arranged inside the heat exchange pipe 10 and a flow blocking plate 17 capable of sliding along the axis direction of the heat exchange pipe 10, wherein the flow blocking plate 17 is located at the liquid inlet position of the positioning sleeve 16 and has a cross section smaller than the inner cross section of the heat exchange pipe 10, so that the liquid can flow through the side of the flow blocking plate 17, at this time, a T-shaped hole penetrating through the positioning sleeve 16 is formed on the positioning sleeve 16, and 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. Through the above configuration, if the flow rate of the corresponding heat exchange pipe 10 is too large, the excessive flow rate will generate a large pressure on the flow blocking plate 17, and this pressure will cause the plug-in rod 18 to be inserted into the small hole formed in the positioning sleeve 16, thereby reducing the passing area of the liquid or directly achieving the plugging of the liquid path, thereby controlling the flow rate, and after the flow rate decreases, the flow blocking plate 17 loses the pressure effect, and the spring 19 restores the flow blocking plate 17, thereby expanding the flow rate again, thereby forming an intermittent flow state, which can avoid the situation that the flow rate of other pipes is too small due to the excessive flow rate of the local heat exchange pipe 10. In some other reasonable configuration, the spring 19 should be able to balance with the pressure, thereby reducing the flow rate difference of different heat exchange pipes 10, and after balancing the flow rate difference, the distribution of the cooling liquid in the heat exchange pipe 10 will be more balanced, which is beneficial to realize large-area and efficient heat exchange. As a preferred design, the plug-in rod 18 can also be provided in a hollow tubular shape, at this time, a plurality of liquid inlet slots 20 extending in the vertical direction are formed at the bottom end position of the plug-in rod 18, that is, the slots can change the liquid passing area by lifting and moving, and compared with the small hole of the T-shaped hole, the liquid passing area has more flexible linear adjustment performance. The smaller the liquid passing area is, the more the slots move downward, thereby realizing flow control and more easily achieving the balance state with the spring 19, and at the same time, the reciprocating lifting of the flow blocking plate 17 can be avoided to reduce the noise. When this configuration is adopted, the plug-in rod 18 can be directly arranged to slide into the small hole below the T-shaped hole, and the plug-in rod 18 itself can guide the flow blocking plate 17 in the vertical direction, thereby realizing the simplification of the structure. Embodiment two

[0024] The organic waste gas pre-treatment method provided by the embodiment of the present application adopts the organic waste gas pre-treatment device of any one of the embodiment one, and the method comprises the following steps. During the initial operation, the flow rate of each group of cloth bag filter assembly 3 in unit time is monitored, and the proportion of the flow rate of each gas outlet pipe 5 to the overall flow rate of the cloth bag filter assembly 3 is calculated. Real-time monitoring equipment corresponding to the outflow pipe 5 of the flow relative to the proportion of the bag filter assembly 3 flow value, when it is lower than the initial detection of the proportion of the value multiplied by a set coefficient (the coefficient can be set according to the actual demand); Or the overall flow of the bag filter assembly 3 is lower than the initial operation of the overall flow multiplied by another set coefficient (the coefficient can be set according to the actual demand) after, selectively stop the equipment, open the back blowing system through the three-way electromagnetic valve 7, and blow the bag filter assembly 3 by the inlet pipe 21.

[0025] In this method, the ventilation volume of different cell wind covers 4 can be obtained, and the working state is monitored and the corresponding parameters are obtained, which provides an effective reference for whether the equipment needs to be maintained. In some unexpected situations, if the internal bag filter assembly 3 fails to seal or is damaged due to aging, the flow corresponding to the outflow pipe 5 will also increase linearly at this time. By closing the corresponding three-way electromagnetic valve 7, the entire filter assembly can be prevented from failing, ensuring that other filter assemblies can operate normally and ensuring the stable operation of the equipment. The above-mentioned method can rotate the baffle 9 to a downward position during back blowing, and rotate the baffle 9 to a horizontal state after back blowing is completed. When the baffle 9 is in a horizontal state, cooling liquid is supplied to the heat exchange pipe 10, cooling medium is provided to achieve cooling of the gas to be filtered, thereby reducing the temperature of the bag filter, which helps to delay the aging failure rate and prolong the service life of the bag filter.

[0026] The above only describes the preferred embodiments of the present application. It should be noted that for those skilled in the art, without departing from the technical principles of the present application, several improvements and modifications can be made, and these improvements and modifications should also be considered as the protection scope of the present application.

Claims

1. An organic waste gas pretreatment device, characterized in that, The system includes a wind box (1), with a primary filter plate assembly (2) located upstream inside the wind box (1) and multiple sets of bag filter assemblies (3) arranged in an array along the extension direction of the wind box (1) located downstream inside the wind box (1). Each set of bag filter assemblies (3) includes multiple fixed supports spliced ​​and arranged at the cross-section of the wind box (1) 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 the fixed supports are located between every two adjacent filter bags. Each is equipped with a partition plate. The back of the fixed bracket is fitted with multiple hoods (4) that can cover multiple filter bags at the same time, so that the air outlet surface of the filter bag and the hood (4) form a closed space. An air outlet pipe (5) is connected to the hood (4). A flow sensor (6) and a three-way solenoid valve (7) are arranged sequentially on the air outlet pipe (5) along the air outlet direction. Several air inlet pipes (21) are also configured on the air box (1). 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).

2. The organic waste gas pretreatment device according to claim 1, characterized in that, It also includes a secondary diffusion chamber (8), which is a flat hollow box in shape. 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 the surface of the hollow box is provided with discretely distributed air outlets.

3. The organic waste gas pretreatment device according to claim 1, characterized in that, Inside the air box (1), at the air inlet position of each group of bag filter assembly (3), there are multiple baffles (9) arranged in the vertical direction. Each baffle (9) is rotatably arranged on the air box (1). The outside of the air box (1) is also provided with a rotation drive device for driving the corresponding baffle (9) to rotate.

4. The organic waste gas pretreatment device according to claim 3, characterized in that, Each of the baffles (9) is provided with a rotating shaft (11) that penetrates the outside of the bellows (1). Multiple rotating shafts (11) in the same column are arranged in a straight line. Each rotating shaft (11) is provided with a gear (12) on its outside. The outside of the bellows (1) is provided with a slide bar (13) that can slide in the vertical direction. Multiple toothed plates (14) that can contact the corresponding gears (12) are provided on the slide bar (13). The rotation drive device is used to drive the slide bar (13) to slide in the vertical direction.

5. The organic waste gas pretreatment device according to claim 4, characterized in that, The rotating shaft (11) is a hollow tube, and the hollow tube passes through both sides of the ventilation box (1). The baffle (9) is fixedly installed on the surface of the hollow tube. Multiple heat exchange tubes (10) are arrayed on the hollow tube along the extension direction of the hollow tube. Each heat exchange tube (10) is perpendicular to the corresponding baffle (9). The other end of all the heat exchange tubes (10) in the same row is connected to a liquid outlet pipe (15). 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).

6. The organic waste gas pretreatment device according to claim 5, characterized in that, Each heat exchange tube (10) is provided with a flow-suppressing component. The flow-suppressing component 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). The positioning sleeve (16) has a T-shaped hole that passes through the positioning sleeve (16). 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). The plug-in rod (18) can be inserted into the small hole below the T-shaped hole by moving.

7. The organic waste gas pretreatment device according to claim 6, characterized in that, The plug rod (18) is a hollow tube, and several liquid inlet slots (20) extending vertically are provided at the bottom end of the plug rod (18).

8. The organic waste gas pretreatment device according to claim 7, characterized in that, The plug rod (18) is slidably mounted in the small hole below the T-shaped hole.

9. A method for pretreatment of organic waste gas, characterized in that, The method using the organic waste gas pretreatment device as described in any one of claims 5-8 includes: 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. The flow rate of the corresponding air outlet pipe (5) in the real-time monitoring device is compared with the flow rate of the bag filter assembly (3). When the flow rate is lower than the initial flow rate multiplied by a set coefficient, or when the overall flow rate of the bag filter assembly (3) is lower than the initial flow rate multiplied by another set coefficient, the device is selectively stopped. The backflush system is opened through the three-way solenoid valve (7), and gas is introduced through the air inlet pipe (21) to backflush the bag filter assembly (3).

10. The method for pretreatment of organic waste gas according to claim 9, characterized in that, During the backflushing process, the baffle (9) is rotated to a downward angle, and after the backflushing is completed, the baffle (9) is rotated to a horizontal position, and while the baffle (9) is in a horizontal position, coolant is supplied to the heat exchange tube (10).

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