A waste gas treatment device and process based on hemp cotton fabric dyeing production

Abstract

This invention discloses a waste gas treatment device and process based on the dyeing production of linen and cotton fabrics, belonging to the field of waste gas treatment technology. It includes a housing with an inlet main pipe on one side and independent filter components mounted on the housing. By setting up independent filter components, this invention utilizes a first partition plate, a second partition plate, and a compartmentalized perforated plate to construct multiple relatively independent filter chambers. A control mechanism drives butterfly valves to open and close, adjusting the number of filter chambers in operation. This allows for dynamic adjustment of the total filtration area of ​​the equipment according to changes in the linen-cotton blend ratio, consistently maintaining the filtration velocity within a suitable operating range. This enhances the equipment's adaptability to varying waste gas conditions, reducing dust accumulation on the filter bag surface under high fiber concentration conditions and lowering system wind resistance and induced draft fan energy consumption under low fiber concentration conditions.

Description

Technical Field

[0001] This invention relates to the field of waste gas treatment technology, and in particular to a waste gas treatment device and process based on the dyeing production of linen and cotton fabrics. Background Technology

[0002] The dyeing process of linen and cotton fabrics generates waste gas containing fiber debris and particulate matter. Baghouse dust collectors are widely used waste gas treatment equipment in the dyeing and printing industry, effectively intercepting solid pollutants in the waste gas and ensuring that the waste gas meets emission standards. In actual production, dyeing production lines need to frequently change fabric batches according to order requirements. The linen-cotton blend ratio varies significantly between different batches, resulting in significant fluctuations in the concentration and composition characteristics of pollutants in the waste gas. This places higher demands on the adaptability of waste gas treatment equipment to different operating conditions. However, existing waste gas treatment equipment based on linen and cotton fabric dyeing still has the following shortcomings in use: Existing waste gas treatment equipment for hemp and cotton fabric dyeing production uses a fixed number of filtration stages. The total airflow can only be adjusted via valves, and the number and combination of filtration stages cannot be dynamically adjusted according to the waste gas composition. Hemp and cotton fabric dyeing production involves frequent batch changes, with significant differences in the hemp-cotton blend ratio between batches. This results in large fluctuations in fiber concentration, particulate matter viscosity, and volatile organic compound composition in the waste gas, leading to insufficient compatibility and filtration stage mismatch. In low-fiber-concentration batches, full-path filtration causes unnecessary air resistance loss, increasing the energy consumption of the induced draft fan and raising production operating costs. In high-fiber-concentration batches, a fixed number of filtration stages easily leads to filter layer overload and clogging, shortening filter bag lifespan. Furthermore, it cannot achieve an adaptive balance between air resistance and filtration efficiency, reducing the stability of waste gas purification effects. Summary of the Invention

[0003] The purpose of this application is to provide a waste gas treatment device and process based on the dyeing production of linen and cotton fabrics, which can effectively solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this application provides the following technical solution: a waste gas treatment device based on the dyeing production of linen and cotton fabrics, comprising a housing, an air inlet manifold disposed on one side of the housing, and an independent filter assembly disposed on the housing; the independent filter assembly comprises: A first partition plate is disposed inside the housing; the inner wall of the housing and the first partition plate form an isolation cavity; Multiple second partition plates are equally spaced inside the housing; The compartmentalized perforated plate is installed inside the housing near the top and is used to divide the housing into a clean air chamber at the top and a filter chamber at the bottom. The circumferential inner wall of the housing, the first partition plate, the compartmentalized perforated plate and multiple second partition plates cooperate to divide the filter chamber inside the housing into multiple relatively independent chambers, and each chamber is equipped with a set of filter bags. A dividing branch pipe is installed in the isolation cavity inside the housing. One end of the dividing branch pipe is connected to the main air intake pipe, and the other end of the dividing branch pipe has multiple outlets that are respectively connected to multiple independent chambers. Multiple butterfly valves are installed at multiple outlet positions of the dividing branch pipe; The control mechanism is located in the housing and is used to control the opening and closing of multiple butterfly valves.

[0005] Preferably, the control mechanism includes a slide rail, a slide rod, a cylinder, multiple gear shafts, and a rack; the slide rod is slidably connected to the first partition plate via the slide rail, the cylinder is mounted on the housing, and the output end of the cylinder is connected to the slide rod; the gear shaft is coaxially connected to the control rod of the butterfly valve; when the gear shaft drives the control rod of the butterfly valve to rotate around its axis, it allows the valve plate of the butterfly valve to be raised and lowered to realize the opening and closing of the butterfly valve; multiple racks are arranged on the slide rod, and the gear shaft is meshed with the rack.

[0006] Preferably, the slide bar has multiple grooves arranged along its length, and the lengths of the multiple grooves decrease sequentially along the length of the slide bar; multiple racks are slidably connected to the grooves; a linear spring is provided in each groove, and one end of the linear spring is connected to the groove, and the other end of the linear spring is connected to the rack.

[0007] Preferably, a filter bag opening and closing assembly is provided inside the housing; the filter bag opening and closing assembly is used to cover or remove the top air outlet of the corresponding filter bag group inside the housing, so as to realize the commissioning and offline operation of a portion of the filter bag group in a single independent filtration chamber.

[0008] Preferably, the filter bag opening and closing assembly includes multiple sealing covers, sealing rings, a driving mechanism, and group partitions; the multiple sealing covers are disposed above the compartmentalized perforated plate, and the sealing covers have multiple staggered holes; the sealing rings are disposed on the sealing covers, and the sealing covers abut against the air outlet at the top of the filter bag through the sealing rings; the driving mechanism is installed in the housing and is used to control the rotation of the sealing covers; the multiple group partitions are disposed on the compartmentalized perforated plate and are used to physically separate the upper clean air spaces corresponding to different filter bag groups, forming mutually independent grouped clean air chambers.

[0009] Preferably, the drive mechanism includes a geared motor and a rotating shaft; the geared motor is mounted on the housing, the rotating shaft is rotatably connected to the clean air chamber around its axis, and the output end of the geared motor is coaxially connected to the rotating shaft; the sealing cover is fixed to the rotating shaft.

[0010] Preferably, the housing is provided with an actuator; the actuator is used to output control commands to the control mechanism and the drive mechanism according to the concentration of exhaust gas in the intake manifold, so as to control the corresponding actuator to complete the opening and closing of the passage.

[0011] Preferably, the execution component includes an intake branch pipe, a mounting base, a concentration detection probe, a controller, and a cleaning mechanism; the intake branch pipe is located in the main intake pipe, the concentration detection probe is mounted on the intake branch pipe via the mounting base, and the concentration detection probe is coaxially arranged with the intake branch pipe; the controller is located on one side of the housing, and the concentration detection probe, the control mechanism, and the drive mechanism are all connected to the controller via signal control; the cleaning mechanism is located in the intake branch pipe and is used to perform pulse purging on the mirror surface of the concentration detection probe.

[0012] Preferably, the cleaning mechanism includes an annular gas collection hood, a connecting pipe, an electromagnetic pulse valve, and multiple purge nozzles; the annular gas collection hood is disposed on the inlet branch pipe, and the multiple purge nozzles are equally spaced around the annular gas collection hood, and the multiple purge nozzles obliquely flush the surface of the concentration detection probe; the annular gas collection hood is connected to a compressed gas tank on one side of the housing through the connecting pipe; the electromagnetic pulse valve is disposed on the connecting pipe.

[0013] A waste gas treatment process based on the dyeing of linen and cotton fabrics, employing the aforementioned waste gas treatment equipment for the dyeing of linen and cotton fabrics, specifically includes the following steps: Step 1, Independent Filtration Control: When the proportion of hemp fiber is high and the fiber concentration in the exhaust gas is relatively high, all filtration chambers are put into operation simultaneously. The dust-laden exhaust gas enters the corresponding filtration chamber through the bottom air inlet of each chamber, passes through the filter bag to complete the dust filtration, and then the purified gas is discharged into the clean air chamber from the top. When the proportion of cotton fiber is high and the fiber concentration in the exhaust gas is relatively low, the control mechanism controls the butterfly valve to shut off the air inlet passage of some filtration chambers, and the corresponding filtration chamber exits the filtration mode, while the remaining filtration chambers bear the entire air flow. Step 2, Filter Bag Opening and Closing Control: When the ratio of hemp and cotton blends fluctuates slightly and no large-scale adjustment at the chamber level is required, the drive mechanism rotates the sealing cover to cover or remove the top air outlet of the corresponding filter bag group, realizing the operation and offline operation of some filter bag groups in the filtration chamber, and completing the fine adjustment of the filtration area in small steps; when a single filter bag group needs to be cleaned, the air outlet of the corresponding group can be blocked by the sealing cover of the filter bag group, so that the filter bag group is disconnected from the main filtration air path, realizing offline cleaning of a single group.

[0014] In summary, the technical effects and advantages of this invention are as follows: 1. This invention sets up independent filtration components, using a first partition plate, a second partition plate, and a compartmentalized perforated plate to construct multiple relatively independent filtration chambers. The number of filtration chambers in operation is adjusted by controlling the butterfly valves to open and close. The total filtration area of ​​the equipment can be dynamically adjusted according to the change in the hemp-cotton blend ratio, and the filtration velocity is always maintained within a suitable operating range. This improves the equipment's adaptability to varying exhaust gas conditions, reduces the dust accumulation rate on the filter bag surface under high fiber concentration conditions, and reduces system wind resistance and induced draft fan energy consumption under low fiber concentration conditions.

[0015] 2. This invention, by setting up a filter bag opening and closing assembly, uses a drive mechanism to drive the sealing cover plate to rotate above the compartment plate, and opens and closes the air outlet at the top of the filter bag, realizing the operation and offline operation of some filter bag groups in a single filtration chamber. This can further reduce the adjustment step of the filtration area, improve the precision of working condition matching, better adapt to the small fluctuations in the proportion of linen and cotton blends, and at the same time realize the offline isolation of a single filter bag group, which facilitates the offline cleaning operation of a single group, reduces the secondary escape of dust during the cleaning process, and improves the stability of the exhaust gas purification effect.

[0016] 3. This invention, by setting up an execution component, uses a concentration detection probe to collect real-time exhaust gas concentration data in the intake branch pipe, and links and controls the independent filter component and filter bag opening and closing component to complete the switching action of the filtration path. It can realize fully automatic adaptive adjustment of the filtration path without manual operation, reducing the workload of maintenance personnel. At the same time, it can quickly respond to concentration fluctuations caused by fabric batch changes, always ensuring that the filtration air velocity is in the optimal operating range, and balancing filtration efficiency and operating energy consumption.

[0017] 4. This invention, by setting up a cleaning mechanism, uses an annular gas collection hood to evenly distribute compressed gas to multiple purge nozzles on the periphery, and works in conjunction with an electromagnetic pulse valve to achieve pulsed oblique purging operation. This can remove fiber and particulate contaminants attached to the lens of the concentration detection probe in all directions, maintain the long-term stability of concentration detection accuracy, and at the same time, the pulsed purging method can minimize the consumption of compressed gas and reduce the long-term operating cost of the equipment. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 This is a partial cross-sectional three-dimensional structural diagram of the housing of the present invention; Figure 3 This is a three-dimensional structural diagram of the independent filter component of the present invention; Figure 4 This is a partial three-dimensional schematic diagram of the independent filter component of the present invention; Figure 5 This is a three-dimensional structural diagram of the filter bag opening and closing component of the present invention; Figure 6 This is a three-dimensional schematic diagram of a portion of the filter bag opening and closing assembly of the present invention; Figure 7 This is a three-dimensional structural diagram of the execution component of the present invention; Figure 8 This is a partial cross-sectional three-dimensional structural diagram of the execution component of the present invention; Figure 9 For the present invention Figure 8 Enlarged structural diagram of region A in the middle; Figure 10 This is a flowchart of the method of the present invention.

[0020] In the diagram: 1. Housing; 2. Main intake pipe; 3. Independent filter assembly; 31. First partition plate; 32. Second partition plate; 33. Compartmentalized perforated plate; 34. Partition branch pipe; 35. Butterfly valve; 36. Control mechanism; 361. Slide rail; 362. Slide rod; 363. Cylinder; 364. Gear shaft; 365. Slide groove; 366. Rack; 367. Linear spring; 4. Filter bag opening and closing assembly; 41. Sealing cover plate; 42. Misalignment hole; 43. Sealing ring; 44. Drive mechanism; 441. Gear motor; 442. Rotating shaft; 45. Group partition plate; 5. Actuation assembly; 51. Intake branch pipe; 52. Mounting base; 53. Concentration detection probe; 54. Cleaning mechanism; 541. Annular gas collection hood; 542. Purge nozzle; 543. Connecting pipe; 544. Electromagnetic pulse valve. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Example 1: Please refer to Figures 1-3The waste gas treatment equipment shown includes a housing 1, an inlet main pipe 2 on one side of the housing 1, and an independent filter assembly 3 on the housing 1. The independent filter assembly 3 includes: a first partition plate 31, a compartmentalized perforated plate 33, a partition branch pipe 34, a control mechanism 36, multiple second partition plates 32, and a butterfly valve 35. The first partition plate 31 is disposed inside the housing 1. The inner wall of the housing 1 and the first partition plate 31 form an isolation cavity. Multiple second partition plates 32 are equally spaced inside the housing 1. The compartmentalized perforated plate 33 is disposed inside the housing 1 near the top and is used to divide the interior of the housing 1 into compartments. The housing 1 has a top clean air chamber and a bottom filter chamber. The circumferential inner wall of the housing 1, the first partition plate 31, the compartmentalized plate 33, and multiple second partition plates 32 cooperate to divide the filter chamber inside the housing 1 into multiple relatively independent chambers, and each chamber is equipped with a set of filter bags. The partition branch pipe 34 is located in the isolation chamber inside the housing 1. One end of the partition branch pipe 34 is connected to the main air intake pipe 2, and the other end of the partition branch pipe 34 has multiple outlets that are connected to multiple independent chambers. Multiple butterfly valves 35 are respectively located at multiple outlet positions of the partition branch pipe 34. The control mechanism 36 is located in the housing 1 and is used to control the opening and closing of the multiple butterfly valves 35.

[0023] It should be noted that during use, the waste gas generated from the dyeing of linen and cotton fabrics enters the housing 1 through the main inlet pipe 2. The first partition plate 31 separates the housing 1 into an isolation chamber. The compartmentalized perforated plate 33 is located near the top of the housing 1, dividing the interior of the housing 1 into a clean air chamber at the top and a filter chamber at the bottom. Multiple second partition plates 32 are arranged at equal intervals inside the housing 1. Together with the circumferential inner wall of the housing 1, the first partition plate 31 and the compartmentalized perforated plate 33 divide the filter chamber into multiple relatively independent chambers, with a set of filter bags installed in each chamber. After entering the main inlet pipe 2, the waste gas flows into the partition branch pipe 34. The partition branch pipe 34 is located in the isolation chamber, with one end inlet connected to the main inlet pipe 2 and multiple outlets at the other end connected to multiple independent chambers, distributing the waste gas to the inlets of each independent chamber. The control mechanism 36 controls the opening and closing of multiple butterfly valves 35 according to the current waste gas conditions, correspondingly opening or closing the air intake passages of some chambers. When the change in the ratio of hemp and cotton blends leads to an increase in the fiber concentration in the exhaust gas, the control mechanism 36 opens more butterfly valves 35, increases the number of operating chambers, and expands the total filtration area; when the fiber concentration in the exhaust gas decreases, the control mechanism 36 closes some butterfly valves 35, reduces the number of operating chambers, reduces the effective filtration area, and keeps the filtration velocity within a reasonable range.

[0024] Multiple independent filtration chambers are constructed through the cooperation of the first partition plate 31, the second partition plate 32, and the compartmentalized perforated plate 33. These chambers, along with the partition branch pipes 34 and butterfly valves 35, enable switching of filtration pathways at the chamber level. The number of operating chambers can be adjusted according to fluctuations in the cotton-linen blend ratio, ensuring the filtration velocity remains within a suitable range. Under high-concentration conditions, this effectively prevents filter bag overload and clogging; under low-concentration conditions, it reduces unnecessary air resistance losses, lowers the operating energy consumption of the induced draft fan, and comprehensively improves the equipment's adaptability to changing operating conditions.

[0025] See Figures 1-4 The control mechanism 36 includes a slide rail 361, a slide rod 362, a cylinder 363, multiple gear shafts 364, and a rack 366. The slide rod 362 is slidably connected to the first partition plate 31 via the slide rail 361. The cylinder 363 is installed on the housing 1, and the output end of the cylinder 363 is connected to the slide rod 362. The gear shafts 364 are coaxially connected to the control rod of the butterfly valve 35. When the gear shafts 364 drive the control rod of the butterfly valve 35 to rotate around its axis, the valve plate of the butterfly valve 35 is allowed to rise and fall to realize the opening and closing of the butterfly valve 35. Multiple racks 366 are arranged on the slide rod 362, and the gear shafts 364 are meshed with the racks 366.

[0026] It should be noted that when the control mechanism 36 is running, the slide rod 362 is slidably connected to the first partition plate 31 via the slide rail 361. The cylinder 363 is installed on the housing 1 and outputs linear power, driving the slide rod 362 to perform linear reciprocating motion along the slide rail 361. When the slide rod 362 moves, it drives multiple racks 366 on it to move synchronously. The racks 366 mesh with the gear shafts 364 of the corresponding butterfly valves 35, converting the linear motion of the slide rod 362 into the rotational motion of the gear shafts 364. The gear shafts 364 are coaxially connected to the control rod of the butterfly valve 35, driving the control rod of the butterfly valve 35 to rotate around its axis, thereby driving the valve plate of the butterfly valve 35 to rotate, realizing the opening and closing action of the butterfly valve 35. A single slide rod 362 can simultaneously drive multiple butterfly valves 35 to complete the opening and closing action.

[0027] The transmission structure, which uses slide rail 361 and slide rod 362 in combination with rack 366 and gear shaft 364, can drive multiple butterfly valves 35 to move synchronously through a single cylinder 363, which greatly reduces the number of actuators, simplifies the transmission system structure of the equipment, and improves the response speed and consistency of the filter chamber switching process.

[0028] See Figure 4 The slide bar 362 has multiple slide grooves 365 arranged along the length of the slide bar 362, and the length of the multiple slide grooves 365 decreases sequentially along the length of the slide bar 362; multiple racks 366 are slidably connected to the slide grooves 365 respectively; a linear spring 367 is provided in the slide groove 365, and one end of the linear spring 367 is connected to the slide groove 365, and the other end of the linear spring 367 is connected to the rack 366.

[0029] It should be noted that during the movement of the slide bar 362, the rack 366 first slides relative to the corresponding groove 365. The linear spring 367 undergoes elastic deformation as the rack 366 slides relative to the groove 365. When the rack 366 slides to the end of the groove 365, it moves together with the slide bar 362 and drives the gear shaft 364 to rotate. Multiple grooves 365 are opened along the length of the slide bar 362, and the length of the multiple grooves 365 decreases sequentially along the length of the slide bar 362. The racks 366 corresponding to different grooves 365 reach the transmission position at different times, and the corresponding butterfly valves 35 complete the opening and closing actions sequentially, rather than all butterfly valves 35 opening and closing simultaneously.

[0030] By using a buffer transmission structure with slide grooves 365 of different lengths and linear springs 367, multiple butterfly valves 35 can be opened and closed in stages and sequentially. This avoids large changes in system air pressure caused by the simultaneous opening and closing of multiple chambers, ensuring the smooth operation of the induced draft fan. At the same time, it can reduce the impact of instantaneous airflow on the filter bags and maximize the service life of the filter bags. Furthermore, it can control the activation of different numbers of filter chambers. That is, after the first butterfly valve 35 rotates and closes, the second butterfly valve 35 will start to rotate and close. In this way, multiple butterfly valves 35 are controlled to rotate and close separately to achieve the activation of different numbers of filter chambers.

[0031] See Figures 5-6 The housing 1 is equipped with a filter bag opening and closing assembly 4. The filter bag opening and closing assembly 4 is used to cover or remove the top air outlet of the corresponding filter bag group in the housing 1 to realize the commissioning and offline operation of a single independent filter chamber part of the filter bag group. The filter bag opening and closing assembly 4 includes multiple sealing cover plates 41, sealing rings 43, driving mechanism 44 and group partition plates 45. Multiple sealing cover plates 41 are set above the compartment plate 33, and multiple staggered holes 42 are opened on the sealing cover plates 41. The sealing rings 43 are set on the sealing cover plates 41, and the sealing cover plates 41 abut against the top air outlet of the filter bag through the sealing rings 43. The driving mechanism 44 is installed on the housing 1 and is used to control the rotation of the sealing cover plates 41. Multiple group partition plates 45 are set on the compartment plate 33 and are used to physically separate the upper clean air space corresponding to different filter bag groups to form mutually independent group clean air chambers.

[0032] It should be noted that when the filter bag opening and closing assembly 4 is running, the drive mechanism 44 is installed on the housing 1 and drives the sealing cover 41 to rotate above the compartment plate 33. When the sealing cover 41 rotates to cover the air outlet at the top of the filter bag, the sealing ring 43 comes into close contact with the air outlet at the top of the filter bag, blocking the airflow, and the corresponding filter bag group stops filtration operation. Multiple group partition plates 45 above the compartment plate 33 physically separate the upper clean air space corresponding to different filter bag groups, forming independent group clean air chambers to prevent airflow between offline filter bag groups and running filter bag groups.

[0033] Adding a filter bag opening and closing component 4 to the independent filter component 3 further reduces the adjustment step of the filtration area, improves the precision of operating condition matching, better adapts to scenarios with small fluctuations in the proportion of linen and cotton blends, and always maintains the optimal filtration velocity. The sealing cover plate 41, together with the sealing ring 43, ensures the sealing effect of the offline filter bag group, and the group partition plate 45 can prevent airflow between groups, while also realizing offline isolation of a single group of filter bags, facilitating the single-group dust cleaning operation, reducing secondary dust escape during the dust cleaning process, and improving the stability of the exhaust gas purification effect.

[0034] See Figures 5-6 The drive mechanism 44 includes a geared motor 441 and a rotating shaft 442; the geared motor 441 is mounted on the housing 1, and the rotating shaft 442 is rotatably connected to the clean air chamber around its axis, and the output end of the geared motor 441 is coaxially connected to the rotating shaft 442; the sealing cover plate 41 is fixed to the rotating shaft 442.

[0035] It should be noted that when the drive mechanism 44 is running, the geared motor 441 outputs a decelerated and torque-increasing rotational power, driving the rotating shaft 442 to rotate around its own axis within the clean air chamber. The sealing cover plate 41 rotates synchronously with the rotating shaft 442. By controlling the rotation angle and direction of the geared motor 441, the circumferential position of the sealing cover plate 41 can be precisely adjusted, achieving alignment and misalignment switching between the misaligned hole 42 and the air outlet of the filter bag, thus completing the opening and closing control of the filter bag assembly passage.

[0036] The structure adopts a geared motor 441 to directly drive the rotating shaft 442 to rotate the sealing cover plate 41. The transmission path is short, the structure is compact, it occupies less internal space in the clean air chamber, and has a lower impact on the airflow resistance in the chamber. At the same time, the rotation angle control accuracy is high, which can stably realize the on / off switching of the filter bag group passage and ensure the reliability and accuracy of the adjustment action.

[0037] See Figure 7 An actuator 5 is provided on the housing 1. The actuator 5 is used to output control commands to the control mechanism 36 and the drive mechanism 44 according to the concentration of exhaust gas in the intake manifold 2, so as to control the corresponding actuator to complete the opening and closing of the passage. The actuator 5 includes an intake branch pipe 51, a mounting base 52, a concentration detection probe 53, a controller, and a cleaning mechanism 54. The intake branch pipe 51 is located in the intake manifold 2. The concentration detection probe 53 is installed in the intake branch pipe 51 through the mounting base 52, and the concentration detection probe 53 is coaxially arranged with the intake branch pipe 51. The controller is located on one side of the housing 1, and the concentration detection probe 53, the control mechanism 36, and the drive mechanism 44 are all connected to the controller through signal control. It is understood that the controller and the concentration detection probe 53 are existing technologies and will not be described in detail. The cleaning mechanism 54 is located in the intake branch pipe 51 and is used to perform pulse purging on the mirror surface of the concentration detection probe 53.

[0038] It should be noted that when component 5 is running, the intake branch pipe 51 draws a portion of the exhaust gas from the main intake pipe 2 as a detection gas path. The concentration detection probe 53 detects the concentration of fibers and particulate matter flowing through the exhaust gas in real time and transmits the detection data to the controller. The controller outputs corresponding control commands to the control mechanism 36 and the drive mechanism 44 based on the concentration data, adjusting the number of operating chambers and filter bag groups to match the effective filtration area with the current exhaust gas conditions. The cleaning mechanism 54 performs pulse purging on the mirror surface of the concentration detection probe 53 according to a preset cycle to remove contaminants adhering to the mirror surface.

[0039] The concentration detection probe 53 collects in-air concentration data in real time, and the linkage control mechanism 36 and the filter bag opening and closing assembly 4's path switching structure enable fully automatic adaptive adjustment of the filtration path, eliminating the need for manual operation and reducing the workload of maintenance personnel. The bypass detection structure of the inlet branch pipe 51 avoids interference from the main airflow on the detection accuracy, and can quickly respond to concentration fluctuations caused by changes in the blending ratio, always maintaining the filtration velocity within the optimal range, thus balancing filtration efficiency and operating energy consumption.

[0040] Example 2: The technical solution of this example differs from that of Example 1 in that: (See below) Figures 7-9 The cleaning mechanism 54 includes an annular gas collection hood 541, a connecting pipe 543, an electromagnetic pulse valve 544, and multiple purge nozzles 542. The annular gas collection hood 541 is located on the air inlet branch pipe 51, and the multiple purge nozzles 542 are equally spaced around the annular gas collection hood 541, and the multiple purge nozzles 542 obliquely flush the mirror surface of the concentration detection probe 53. The annular gas collection hood 541 is connected to a compressed air tank on one side of the housing 1 through the connecting pipe 543. The electromagnetic pulse valve 544 is located on the connecting pipe 543.

[0041] It should be noted that when the cleaning mechanism 54 is running, the electromagnetic pulse valve 544 opens and closes the air passage of the connecting pipe 543 according to a preset cycle and duration. The compressed gas in the compressed gas tank on one side of the housing is transported to the annular gas collecting hood 541 through the connecting pipe 543. The annular gas collecting hood 541 evenly distributes the compressed gas to multiple purge nozzles 542 on the periphery. The high-speed airflow is ejected obliquely from the purge nozzles 542, which thoroughly cleans the mirror surface of the concentration detection probe 53, blowing away the fibers and dust particles attached to the mirror surface, thus completing the cleaning operation of the probe mirror surface.

[0042] The structure employing an annular gas collection hood 541 paired with multiple equally spaced purge nozzles 542 for oblique purging can comprehensively cover the mirror area of ​​the concentration detection probe 53, effectively removing attached fiber and particulate contaminants and maintaining long-term stability of detection accuracy. The pulse-type purging method controlled by the electromagnetic pulse valve 544 can minimize the consumption of compressed gas while ensuring cleaning effectiveness, thereby reducing equipment operating costs.

[0043] See Figures 1-10 A waste gas treatment process based on the dyeing of linen and cotton fabrics, employing the aforementioned waste gas treatment equipment for the dyeing of linen and cotton fabrics; specifically including the following steps: Step 1, Independent Filtration Control: When the proportion of hemp fiber is high and the fiber concentration in the exhaust gas is relatively high, all filtration chambers are put into operation simultaneously. The dust-laden exhaust gas enters the corresponding filtration chamber through the bottom air inlet of each chamber, passes through the filter bag to complete the dust filtration, and then the purified gas is discharged into the clean air chamber from the top. When the proportion of cotton fiber is high and the fiber concentration in the exhaust gas is relatively low, the butterfly valve 35 is controlled by the control mechanism 36 to shut off the air inlet passage of some filtration chambers, and the corresponding filtration chamber exits the filtration mode, while the remaining filtration chambers bear the entire air flow. Step 2, Filter Bag Opening and Closing Control: When the ratio of hemp and cotton blending fluctuates slightly and no large-scale adjustment at the chamber level is required, the drive mechanism 44 drives the sealing cover plate 41 to rotate, thereby covering or removing the top air outlet of the corresponding filter bag group, realizing the operation and offline operation of some filter bag groups in the filter chamber, and completing the fine adjustment of the filtration area in small steps; when a single filter bag needs to be cleaned, the air outlet of the corresponding group can be blocked by the filter bag group sealing cover plate 41, so that the filter bag group is disconnected from the main filtration air path, realizing offline cleaning of a single group.

[0044] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A waste gas treatment device based on the dyeing production of linen and cotton fabrics, comprising a housing (1), wherein an air inlet manifold (2) is provided on one side of the housing (1), characterized in that: An independent filter assembly (3) is provided on the housing (1); the independent filter assembly (3) includes: The first partition plate (31) is disposed inside the housing (1); the inner wall of the housing (1) and the first partition plate (31) form an isolation cavity; Multiple second partition plates (32) are equally spaced inside the housing (1); The compartmentalized plate (33) is set inside the housing (1) near the top and is used to divide the housing (1) into a clean air chamber at the top and a filter chamber at the bottom. The circumferential inner wall of the housing (1), the first partition plate (31), the compartmentalized plate (33) and multiple second partition plates (32) cooperate to divide the filter chamber inside the housing (1) into multiple relatively independent chambers, and each chamber is provided with a set of filter bags. A dividing branch pipe (34) is provided in the isolation cavity inside the housing (1). One end of the dividing branch pipe (34) is connected to the main air intake pipe (2), and the other end of the dividing branch pipe (34) has multiple outlets that are respectively connected to multiple independent chambers. Multiple butterfly valves (35) are respectively installed at multiple outlet positions of the dividing branch pipe (34); A control mechanism (36) is located in the housing (1) and is used to control the opening and closing of multiple butterfly valves (35).

2. The waste gas treatment equipment based on the dyeing production of linen and cotton fabrics according to claim 1, characterized in that: The control mechanism (36) includes a slide rail (361), a slide rod (362), a cylinder (363), multiple gear shafts (364), and a rack (366). The slide rod (362) is slidably connected to the first partition plate (31) via the slide rail (361). The cylinder (363) is installed on the housing (1), and the output end of the cylinder (363) is connected to the slide rod (362). The gear shaft (364) is coaxially connected to the control rod of the butterfly valve (35). When the gear shaft (364) drives the control rod of the butterfly valve (35) to rotate around its axis, it allows the valve plate of the butterfly valve (35) to be raised and lowered, so as to realize the opening and closing of the butterfly valve (35). Multiple racks (366) are arranged on the slide rod (362), and the gear shaft (364) is meshed with the rack (366).

3. The waste gas treatment equipment based on the dyeing production of linen and cotton fabrics according to claim 2, characterized in that: The slide bar (362) is provided with a plurality of slide grooves (365) arranged along the length direction of the slide bar (362), and the length of the plurality of slide grooves (365) is arranged to decrease sequentially along the length direction of the slide bar (362); a plurality of racks (366) are slidably connected to the slide grooves (365); a linear spring (367) is provided in the slide groove (365), and one end of the linear spring (367) is connected to the slide groove (365), and the other end of the linear spring (367) is connected to the rack (366).

4. The waste gas treatment equipment based on the dyeing production of linen and cotton fabrics according to claim 1, characterized in that: The housing (1) is provided with a filter bag opening and closing assembly (4); the filter bag opening and closing assembly (4) is used to cover or remove the top air outlet of the filter bag group in the corresponding housing (1) so as to realize the commissioning and offline operation of a single independent filter chamber part of the filter bag group.

5. The waste gas treatment equipment based on the dyeing production of linen and cotton fabrics according to claim 4, characterized in that: The filter bag opening and closing assembly (4) includes multiple sealing covers (41), sealing rings (43), a drive mechanism (44), and group partitions (45); the multiple sealing covers (41) are disposed above the compartment plate (33), and multiple staggered holes (42) are provided on the sealing covers (41); the sealing covers (41) are provided with sealing rings (43), and the sealing covers (41) abut against the air outlet at the top of the filter bag through the sealing rings (43); the drive mechanism (44) is installed on the housing (1) and is used to control the rotation of the sealing covers (41); the multiple group partitions (45) are disposed on the compartment plate (33) and are used to physically separate the upper clean air spaces corresponding to different filter bag groups to form mutually independent group clean air chambers.

6. The waste gas treatment equipment based on the dyeing production of linen and cotton fabrics according to claim 5, characterized in that: The drive mechanism (44) includes a geared motor (441) and a rotating shaft (442); the geared motor (441) is mounted on the housing (1), the rotating shaft (442) is rotatably connected to the clean air chamber around its axis, and the output end of the geared motor (441) is coaxially connected to the rotating shaft (442); the sealing cover plate (41) is fixed to the rotating shaft (442).

7. The waste gas treatment equipment based on the dyeing production of linen and cotton fabrics according to claim 5, characterized in that: An execution component (5) is provided on the housing (1); the execution component (5) is used to output control commands to the control mechanism (36) and the drive mechanism (44) according to the exhaust gas concentration in the intake manifold (2) so as to control the corresponding execution mechanism to complete the passage opening and closing action.

8. The waste gas treatment equipment based on the dyeing production of linen and cotton fabrics according to claim 7, characterized in that: The execution component (5) includes an intake branch pipe (51), a mounting base (52), a concentration detection probe (53), a controller, and a cleaning mechanism (54). The intake branch pipe (51) is located on the main intake pipe (2). The concentration detection probe (53) is mounted on the intake branch pipe (51) via the mounting base (52), and the concentration detection probe (53) is coaxially arranged with the intake branch pipe (51). The controller is located on one side of the housing (1), and the concentration detection probe (53), the control mechanism (36), and the drive mechanism (44) are all connected to the controller via signal control. The cleaning mechanism (54) is located on the intake branch pipe (51) and is used to perform pulse purging on the mirror surface of the concentration detection probe (53).

9. The waste gas treatment equipment based on the dyeing production of linen and cotton fabrics according to claim 8, characterized in that: The cleaning mechanism (54) includes an annular gas collection hood (541), a connecting pipe (543), an electromagnetic pulse valve (544), and multiple purge nozzles (542); the annular gas collection hood (541) is disposed on the air inlet branch pipe (51), and the multiple purge nozzles (542) are equally spaced around the annular gas collection hood (541), and the multiple purge nozzles (542) obliquely flush the mirror surface of the concentration detection probe (53); the annular gas collection hood (541) is connected to a compressed air tank on one side of the housing (1) through the connecting pipe (543); the electromagnetic pulse valve (544) is disposed on the connecting pipe (543).

10. A waste gas treatment process based on the dyeing production of linen and cotton fabrics, characterized in that: The waste gas treatment equipment based on the dyeing production of linen and cotton fabrics as described in claim 5 is adopted; specifically, it includes the following steps: Step 1, Independent Filtration Control: When the proportion of hemp fiber is high and the fiber concentration of waste gas is large, all filter chambers are put into operation simultaneously. The dust-laden waste gas enters the corresponding filter chamber through the bottom air inlet of each chamber. After passing through the filter bag to complete the dust filtration, the purified gas is discharged into the clean air chamber from the top. When the proportion of cotton fiber is high and the fiber concentration of waste gas is low, the butterfly valve (35) is controlled by the control mechanism (36) to shut off the air inlet passage of some filter chambers. The corresponding filter chamber exits the filtration condition, and the remaining filter chambers bear the entire air flow. Step 2, Filter bag opening and closing control: When the ratio of hemp and cotton blending fluctuates slightly and no large-span adjustment at the chamber level is required, the drive mechanism (44) drives the sealing cover plate (41) to rotate, thereby covering or removing the top air outlet of the corresponding filter bag group, realizing the commissioning and offline operation of some filter bag groups in the filter chamber, and completing the fine adjustment of the filtration area in small steps; when a single filter bag needs to be cleaned, the air outlet of the corresponding group can be blocked by the filter bag group sealing cover plate (41), so that the filter bag group is removed from the main filtration air path, realizing offline cleaning of a single group.

Images