An acidic waste gas treatment system and process based on chemical environmental protection production

Abstract

The application relates to the technical field of waste gas treatment, and discloses an acidic waste gas treatment system and process based on chemical environmental protection production, wherein the acidic waste gas treatment system based on chemical environmental protection production comprises a first treatment box, a second treatment box, a conveying pipeline arranged at the two ends of the first treatment box and the second treatment box, a top plate arranged at the top of the first treatment box and the second treatment box, a filter assembly arranged in the first treatment box and the second treatment box, a shunt assembly and a clamping groove. The acidic waste gas treatment system based on chemical environmental protection production is provided with a control shaft, and the air permeability of the part of a rear movable plate and a fixed plate close to the exhaust port is reduced, so that the rear movable plate is attached above the fixed plate, the lower end of a front movable plate is arranged on the top of the fixed plate, air flow is allowed to flow through the front movable plate with good air permeability, and the filtering efficiency of waste gas is ensured and the filtering persistence is enhanced.

Description

Technical Field

[0001] This invention relates to the field of waste gas treatment technology, and in particular to an acidic waste gas treatment system and process based on chemical environmental protection production. Background Technology

[0002] In chemical production processes, the reaction of some acidic raw materials will release acidic waste gases containing components such as HCl, SO2, and H2S. These waste gases are highly corrosive and toxic; direct discharge will damage the atmospheric environment and endanger human health. In order to meet the "Integrated Emission Standard for Air Pollutants" (GB16297-1996) and local ultra-low emission requirements (such as HCl emission concentration ≤10mg / m³), special treatment processes must be used to achieve compliant emissions. Dry adsorption processes have become one of the mainstream technologies for treating acidic waste gases in chemical industries due to their advantages of producing no wastewater and having low equipment corrosion risk. Among them, the process using activated carbon as an adsorbent is the most widely used in the treatment of low-concentration, multi-component acidic waste gases due to its high adsorption capacity and strong selectivity. Existing activated carbon-based acidic waste gas treatment equipment typically consists of waste gas collection pipelines, pretreatment units, activated carbon adsorption towers, and tail gas emission units. Its core working principle is as follows: the pretreated acidic waste gas enters the activated carbon adsorption tower, and through physical and chemical adsorption (such as the reaction of alkaline groups on the surface of modified activated carbon with acidic gases) as the airflow passes through the activated carbon bed, harmful components are fixed and removed, and the purified gas is finally discharged through the emission outlet. However, in practical applications, existing activated carbon adsorption equipment is limited by structural design defects, and generally suffers from the problem of insufficient contact area between the waste gas and the activated carbon bed. This problem directly leads to low equipment operating efficiency and high energy consumption costs. In order to obtain a larger contact area within the limited equipment volume, the activated carbon bed is generally designed in a "sawtooth wave" shape. The larger the inclination angle of the activated carbon bed, the more activated carbon beds can be installed, and the larger the contact area between the activated carbon bed and the activated carbon bed.

[0003] Because the inclined activated carbon bed is directional, when the waste gas flows towards the activated carbon bed, the airflow will naturally converge towards the "bottom (tip)" of the V-shape due to the flow field characteristics of the "wedge space"—that is, the area near the joint of the two activated carbon plates. The airflow velocity will be significantly higher than that of the two edge areas. This will eventually create an uneven situation where "the middle area is overloaded and the edge area is idle," and the overall adsorption efficiency is lower than that under a uniform flow field.

[0004] As the activated carbon in the "intermediate region adsorption overload" area of ​​the activated carbon bed gradually becomes saturated and its permeability gradually decreases, the airflow that is guided and converged here by the activated carbon bed cannot flow through completely. This increases the impact force on the activated carbon bed, causing abnormal vibrations. At the same time, the airflow that cannot be discharged in time will flow to the "edge region adsorption idle" area. These airflows collide with the airflow that normally flows to the activated carbon bed, causing the airflow inside the equipment to become chaotic and exacerbating the abnormal vibrations of the activated carbon bed. Summary of the Invention

[0005] Given that existing technologies suffer from uneven adsorption in activated carbon beds, which may lead to abnormal vibrations, a system and process for treating acidic waste gas based on chemical environmental protection production is proposed.

[0006] This application provides an acidic waste gas treatment system and process based on chemical environmental protection production, the purpose of which is to adjust the adsorption area of ​​the activated carbon bed.

[0007] The technical solution of the present invention is as follows: an acidic waste gas treatment system based on chemical environmental protection production, including a primary treatment box and a secondary treatment box, conveying pipes set at both ends of the primary treatment box and the secondary treatment box, a top plate set at the top of the primary treatment box and the secondary treatment box, and filter components, diversion components and slots set inside the primary treatment box and the secondary treatment box. The filter components specifically include a fixed plate set inside the primary treatment box and the secondary treatment box, and a front movable plate and a rear movable plate set above the fixed plate. Both the primary and secondary treatment boxes have inlets and outlets at their left and right ends, respectively. The diversion assembly is located between the inlet and the filter assembly. The fixed plate, the front movable plate, and the rear movable plate are assembled to form a "V" shape, with the opening of the "V" facing the inlet. The filter assembly also includes a sliding groove on the top of the fixed plate, a sliding block inside the sliding groove, a movable connector between the front movable plate and the slot, between the front movable plate and the rear movable plate, and between the rear movable plate and the sliding block, a mating hole on the top of the fixed plate, an offset hole on the top of the front movable plate, a control shaft passing through the mating hole and the offset hole, and a fixed connector between the control shaft and the front movable plate. The mating hole and the offset hole are located on the same vertical line. The diameter of the mating hole is the same as the diameter of the control shaft, and the diameter of the offset hole is larger than the diameter of the control shaft. The front movable plate and the rear movable plate use three movable connectors to achieve the change between the two states.

[0008] The front movable plate, the rear movable plate, and the fixed plate are symmetrically arranged, and the axis of symmetry remains horizontal.

[0009] The movable connector includes hinge one and hinge two, and a sealing element disposed on the outside of hinge one and hinge two; The sealing element is divided into three parts: two hard rubber pieces and one flexible rubber piece. The two hard rubber pieces correspond to hinge one and hinge two, respectively, and the flexible rubber piece connects the two hard rubber pieces.

[0010] The flexible rubber portion of the seal is a trapezoid with one open end, and the two sides of the trapezoid are connected to two pieces of hard rubber at the ends respectively.

[0011] The fixed plate, the front movable plate, and the rear movable plate are assembled to form a filter unit. There are no fewer than two filter units in the primary treatment box, and the fixed plates of adjacent filter units are fixedly connected with columns.

[0012] The fixed connector includes a lower fixing ring disposed on the upper surface of the front movable plate, an elastic ring disposed on the top of the control shaft, and an upper fixing ring disposed on the top of the elastic ring. The inner diameter of the lower fixing ring is the same as that of the offset hole, and the upper fixing ring is threadedly connected to the control shaft.

[0013] The diversion assembly specifically includes a diversion plate disposed in the slot, a guide plate disposed on the side of the diversion plate, and flow holes opened on the surfaces of the diversion plate and the guide plate; The guide plate protrudes towards the inlet of the primary processing box and is in the shape of a four-sided pyramid. The flow holes on the surfaces of the diverter plate and the guide plate overlap.

[0014] The fixed plate, the front movable plate, and the rear movable plate are all divided into two parts: a frame and an activated carbon filling layer. When the front movable plate and the rear movable plate change between the two states, the flow holes avoid the frame and the carbon filling layer.

[0015] This invention also provides a process for treating acidic waste gas from chemical environmental protection production, comprising the following steps: Acidic waste gas collection and pretreatment: The waste gas is first collected and sent to the pretreatment unit; Primary activated carbon multi-stage adsorption purification: The pre-treated waste gas is introduced into the primary treatment box through the conveying pipeline. The waste gas is evenly dispersed by the diversion component and then flows through the filter component. HCl reacts with NaOH on the surface of activated carbon, and SO2 also reacts with NaOH on the surface of activated carbon. Secondary activated carbon multi-stage adsorption purification: Waste gas flows into the secondary treatment box through the conveying pipeline, the waste gas is evenly dispersed by the diversion component, and then the waste gas flows through the filter component; SO2 reacts with Na2CO3, and H2S reacts with Na2CO3.

[0016] The beneficial effects of this invention are: 1. By designing the front movable plate, rear movable plate, and fixed plate into a "V" shape, more filtration units can be installed in the limited space of the primary and secondary treatment boxes. The exhaust gas flows in from the inlet, then passes through the activated carbon filling layer and flows out from the outlet, completing the filtration. This increases the contact area between the exhaust gas and the activated carbon, improving the purification efficiency of the exhaust gas.

[0017] 2. By setting a control shaft, during normal use, rotating the control shaft lifts the fixed connector via the thread. The fixed connector moves the lower end of the front movable plate upward, causing the front movable plate to rotate clockwise upward. Under the influence of the front movable plate, the rear movable plate rotates counterclockwise upward, forming a V-shape with the fixed plate, thus filtering exhaust gas in a fully filtered state. After a period of time, when the permeability of the rear movable plate and the fixed plate near the exhaust outlet decreases, rotating the control shaft pushes the front movable plate downward via the fixed connector. The front movable plate rotates clockwise downward, and the front movable plate... Driven by the movable plate, the rear movable plate rotates counterclockwise downwards. During this process, the rear movable plate drives the sliding block to slide in the sliding groove through the movable connector. This makes the rear movable plate fit against the top of the fixed plate, and the lower end of the front movable plate rests on the top of the fixed plate, folding and blocking the originally heavily blocked area. This allows all the airflow to flow through the front movable plate, which still maintains good air permeability. This ensures the filtration efficiency of the exhaust gas and enhances the continuity of filtration. It also helps to maintain stable and smooth airflow inside the equipment and avoids abnormal shaking of the front movable plate, rear movable plate, and fixed plate.

[0018] 3. By setting a sealing element, the sealing element is attached to the junction of multiple plates and pressed tightly by hinge one and hinge two. This can prevent gaps from appearing in the rotating parts when the front and rear movable plates are adjusted, which would lead to exhaust gas leakage and affect the exhaust gas purification effect.

[0019] 4. By designing the seal as a trapezoid, when exhaust gas leaks from the gaps in the sheet metal, the exhaust gas enters the trapezoidal space of the flexible rubber part of the seal, causing the inner wall of the trapezoidal space to expand outward, pushing the hard rubber on both sides to fit more tightly with the sheet metal, thus enhancing the sealing effect.

[0020] 5. By setting a guide plate, when the exhaust gas flows to the diversion component, some of the exhaust gas flows directly through the flow hole, while the other part of the exhaust gas is guided and dispersed by the inclined surface around the guide plate and flows through other flow holes. This makes the dispersion effect better and reduces the impact of the exhaust gas on the diversion component. Attached Figure Description

[0021] Figure 1 This is a perspective view of the present invention; Figure 2 This is an anatomical diagram of the internal structure of the primary processing box of the present invention; Figure 3 This is a schematic diagram of the filter component of the present invention; Figure 4 This is a schematic diagram of the first state of the filtering unit of the present invention; Figure 5 This is a schematic diagram of the second state of the filtering unit of the present invention; Figure 6 This is a disassembled diagram of the filter unit of the present invention; Figure 7 This is a schematic diagram of the fixing connector of the present invention; Figure 8 This is a schematic diagram of the movable connector of the present invention; Figure 9 This is an anatomical diagram of the movable connector of the present invention; Figure 10 This is a schematic diagram of the sealing element of the present invention; Figure 11 This is a schematic diagram of the current splitter component of the present invention; Figure 12 This is a top view of the present invention; Figure 13 For the present invention Figure 12 Sectional view at point AA; Figure 14 For the present invention Figure 13 Enlarged view at point B in the middle; Figure 15 For the present invention Figure 13 Enlarged view of point C in the middle.

[0022] In the picture: 1. Primary processing box; 2. Secondary processing box; 3. Conveying pipeline; 4. Filter assembly; 41. Fixed plate; 42. Front movable plate; 43. Rear movable plate; 44. Sliding groove; 45. Sliding block; 46. Movable connector; 461. Hinge 1; 462. Hinge 2; 463. Seal; 47. Matching hole; 48. Offset hole; 49. Control shaft; 410. Fixed connector; 4101. Lower fixed ring; 4102. Elastic ring; 4103. Upper fixed ring; 411. Column; 5. Diverting assembly; 51. Diverting plate; 52. Guide plate; 53. Flow hole; 6. Top plate; 7. Slot. Detailed Implementation

[0023] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0024] Example 1, referring to Figure 1-15The first embodiment of the present invention provides an acidic waste gas treatment system based on chemical environmental protection production, including a primary treatment box 1 and a secondary treatment box 2, conveying pipes 3 disposed at both ends of the primary treatment box 1 and the secondary treatment box 2, a top plate 6 disposed at the top of the primary treatment box 1 and the secondary treatment box 2, and a filter assembly 4, a diversion assembly 5 and a slot 7 disposed inside the primary treatment box 1 and the secondary treatment box 2. The filter assembly 4 specifically includes a fixed plate 41 disposed inside the primary treatment box 1 and the secondary treatment box 2, and a front movable plate 42 and a rear movable plate 43 disposed above the fixed plate 41.

[0025] Specifically, both the left and right ends of the primary treatment box 1 and the secondary treatment box 2 are respectively provided with inlets and outlets. Both ends of the primary treatment box 1 and the secondary treatment box 2 are shaped like square pyramids. The inside of the conveying pipe 3 is lined with PTFE, which has an anti-acid corrosion effect. The primary treatment box 1 is connected to the pretreatment unit through the conveying pipe 3. The pretreatment unit is equipped with a negative pressure fan, dust collector, cooling equipment, and dehumidifier to send the exhaust gas into the primary treatment box 1. The conveying pipe 3 is fixed to the primary treatment box 1 and the secondary treatment box 2 with bolts. The top plate 6 is fixed to the top of the primary treatment box 1 and the secondary treatment box 2 with bolts. The diversion component 5 is located between the inlet and the filter component 4. The fixed plate 41 is connected to the front movable plate 42 and the rear movable plate 4. The three panels form a "V" shape, with the opening of the "V" facing the inlet. The front movable plate 42, the rear movable plate 43, and the fixed plate 41 are symmetrically arranged, and the axis of symmetry remains horizontal. The fixed plate 41, the front movable plate 42, and the rear movable plate 43 are all divided into two parts: a frame and an activated carbon filling layer. When the front movable plate 42 and the rear movable plate 43 change between the two states, the flow holes 53 avoid the frame and the carbon filling layer. This reduces the airflow impacting the frame from the front and helps maintain the stability of the front movable plate 42, the rear movable plate 43, and the fixed plate 41. The activated carbon filling layer in the primary treatment box 1 is filled with NaOH modified granular activated carbon, and the activated carbon filling layer in the secondary treatment box 2 is filled with Na2CO3 modified columnar activated carbon.

[0026] The fixed plate 41, the front movable plate 42 and the rear movable plate 43 are assembled to form a filter unit. There are no less than two filter units in the primary treatment box 1 and the secondary treatment box 2. The fixed plates 41 of adjacent filter units are fixedly connected by columns 411.

[0027] By designing the front movable plate 42, the rear movable plate 43, and the fixed plate 41 into a "V" shape, more filtration units can be installed in the limited space of the primary treatment box 1 and the secondary treatment box 2. The exhaust gas flows in from the inlet, then passes through the activated carbon filling layer and flows out from the outlet, completing the filtration. This increases the contact area between the exhaust gas and the activated carbon, thereby improving the purification efficiency of the exhaust gas.

[0028] The filter assembly 4 also includes a sliding groove 44 opened on the top of the fixed plate 41, a sliding block 45 disposed inside the sliding groove 44, a movable connector 46 disposed between the front movable plate 42 and the slot 7, between the front movable plate 42 and the rear movable plate 43, and between the rear movable plate 43 and the sliding block 45, a mating hole 47 opened on the top of the fixed plate 41, an offset hole 48 opened on the top of the front movable plate 42, a control shaft 49 passing through the mating hole 47 and the offset hole 48, and a fixed connector 410 disposed between the control shaft 49 and the front movable plate 42.

[0029] Specifically, the fixed plate 41 and the sliding block 45 are rotatably connected by the movable connector 46, the rear movable plate 43 and the front movable plate 42 are rotatably connected by the movable connector 46, the front movable plate 42 and the slot 7 are rotatably connected by the movable connector 46, the sliding groove 44, the mating hole 47 and the offset hole 48 are all located on the frame, the sliding block 45 is slidably installed in the sliding groove 44, the mating hole 47 and the offset hole 48 are located on the same vertical line, the diameter of the mating hole 47 is the same as the diameter of the control shaft 49, the diameter of the offset hole 48 is larger than the diameter of the control shaft 49, the front movable plate 42 and the rear movable plate 43 use three movable connectors 46 to realize the change of two states, the control shaft 49 passes through the top plate 6 upwards, and a handwheel or drive motor is installed at the top of the control shaft 49, so that the control shaft 49 can be freely selected to be manually or automatically controlled, one end of the fixed connector 410 is threaded to the control shaft 49, and the other end is fixedly connected to the front movable plate 42.

[0030] By setting the control shaft 49, during normal use, rotating the control shaft 49 lifts the fixed connector 410 via the thread. The fixed connector 410 drives the lower end of the front movable plate 42 to move upward, causing the front movable plate 42 to rotate clockwise upward. Driven by the front movable plate 42, the rear movable plate 43 rotates counterclockwise upward, so that the front movable plate 42, the rear movable plate 43, and the fixed plate 41 form a V-shape to filter the exhaust gas in a fully filtered state. After a period of time, when the air permeability of the rear movable plate 43 and the part of the fixed plate 41 near the exhaust port decreases, rotating the control shaft 49 pushes the front movable plate 42 downward via the fixed connector 410, causing the front movable plate 42 to rotate clockwise downward. Driven by the front movable plate 42, the rear movable plate 43 rotates counterclockwise downwards. During this process, the rear movable plate 43 drives the sliding block 45 to slide in the sliding groove 44 through the movable connector 46, so that the rear movable plate 43 fits against the top of the fixed plate 41, and the lower end of the front movable plate 42 rests on the top of the fixed plate 41, folding and blocking the originally heavily blocked area. This allows all the airflow to flow through the front movable plate 42, which still maintains good air permeability. This can ensure the filtration efficiency of the exhaust gas and enhance the continuity of filtration, which is conducive to maintaining stable and smooth airflow inside the equipment and avoiding abnormal shaking of the front movable plate 42, the rear movable plate 43 and the fixed plate 41.

[0031] The movable connector 46 includes hinge one 461 and hinge two 462, and a sealing element 463 disposed on the outside of hinge one 461 and hinge two 462.

[0032] Specifically, hinge 1 461 and hinge 2 462 are rotatably connected, and the seal 463 is located at the junction of the two ends of the front movable plate 42 and the rear movable plate 43. The seal 463 is divided into three parts, namely two hard rubbers and one flexible rubber. The two hard rubbers correspond to hinge 1 461 and hinge 2 462 respectively, and the flexible rubber connects the two hard rubbers.

[0033] By setting a sealing element 463, which is attached to the junction of multiple plates and pressed by hinge 1 461 and hinge 2 462, gaps can be avoided in the rotating parts when the front movable plate 42 and the rear movable plate 43 are adjusted, which would lead to exhaust gas leakage and affect the exhaust gas purification effect.

[0034] The flexible rubber portion of seal 463 is trapezoidal with one open end, and the two sides of the trapezoid are connected to two pieces of hard rubber at their converging ends, such as... Figure 10 As shown, when exhaust gas leaks from the gaps in the sheet metal, the exhaust gas enters the trapezoidal space of the flexible rubber part of the seal 463, causing the inner wall of the trapezoidal space to expand outward, pushing the hard rubber on both sides to fit more tightly with the sheet metal, thus enhancing the sealing effect.

[0035] The fixed connector 410 includes a lower fixing ring 4101 disposed on the upper surface of the front movable plate 42, an elastic ring 4102 disposed on the top of the control shaft 49, and an upper fixing ring 4103 disposed on the top of the elastic ring 4102. Specifically, the inner diameter of the lower fixed ring 4101 is the same as that of the offset hole 48, the upper fixed ring 4103 is threadedly connected to the control shaft 49, the lower fixed ring 4101 is fixedly connected to the front movable plate 42, and the elastic ring 4102 connects the lower fixed ring 4101 and the upper fixed ring 4103. The elastic ring 4102 can change its shape according to the movement of the lower fixed ring 4101 and the upper fixed ring 4103.

[0036] The diversion assembly 5 specifically includes a diversion plate 51 disposed in the slot 7, a guide plate 52 disposed on the side of the diversion plate 51, and flow holes 53 formed on the surfaces of the diversion plate 51 and the guide plate 52.

[0037] Specifically, the guide plate 52 protrudes towards the inlet of the primary processing box 1 and is in the shape of a four-sided pyramid. The diversion plate 51 and the guide plate 52 are fixed by bolts, and the flow holes 53 on the surfaces of the diversion plate 51 and the guide plate 52 overlap.

[0038] By setting the guide plate 52, when the exhaust gas flows to the diversion component 5, some of the exhaust gas flows directly through the flow hole 53, while the other part of the exhaust gas is guided and dispersed by the inclined surface around the guide plate 52 and flows through the flow hole 53 in other places. This makes the dispersion effect better and reduces the impact of the exhaust gas on the diversion component 5.

[0039] Example 2, refer to Figure 1-2 The second embodiment of the present invention provides: an acidic waste gas treatment process based on chemical environmental protection production, comprising the following steps: Acidic waste gas collection and pretreatment: The waste gas is first collected to the pretreatment unit to avoid fugitive emissions.

[0040] The exhaust gas in the pretreatment unit enters the dust collector, where dust particles with a diameter >0.3μm are intercepted by the filter bags; the exhaust gas then flows into the cooling equipment to reduce the temperature to 30℃; finally, the exhaust gas flows into the dehumidifier to reduce the relative humidity to ≤45%. Primary activated carbon multi-stage adsorption purification: The pretreated exhaust gas is fed into the primary treatment box 1 via the conveying pipe 3 in conjunction with a negative pressure fan. The exhaust gas is evenly dispersed by the diversion component 5 to avoid "channeling," and then flows through the filter component 4 (filled with NaOH-modified granular activated carbon).

[0041] HCl reacts with NaOH on the surface of activated carbon: HCl + NaOH = NaCl + H2O.

[0042] SO2 reacts with NaOH on the surface of activated carbon: SO2 + 2NaOH = Na2SO3 + H2O.

[0043] Indicators: gas velocity 0.3-0.5 m / s, residence time ≥1.8 s, HCl concentration reduced to 30-50 mg / m³ after treatment, SO2 concentration reduced to 20-30 mg / m³. Secondary activated carbon multi-stage adsorption purification: Waste gas flows into the secondary treatment box 2 through the conveying pipe 3. The waste gas is evenly dispersed by the diversion component 5 to avoid "channeling". Then the waste gas flows through the filter component 4 (filled with Na2CO3 modified columnar activated carbon).

[0044] SO2 reacts with Na2CO3: SO2 + Na2CO3 = Na2SO3 + CO2.

[0045] H2S reacts with Na2CO3: H2S + Na2CO3 = NaHS + NaHCO3.

[0046] Indicators: Outlet exhaust gas concentrations: HCl≤5mg / m³, SO2≤8mg / m³, H2S≤1mg / m³, far below ultra-low emission standards. It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. An acidic waste gas treatment system based on chemical environmental protection production, comprising a primary treatment tank (1) and a secondary treatment tank (2), conveying pipes (3) disposed at both ends of the primary treatment tank (1) and the secondary treatment tank (2), a top plate (6) disposed on the top of the primary treatment tank (1) and the secondary treatment tank (2), and filter components (4), diversion components (5) and slots (7) disposed inside the primary treatment tank (1) and the secondary treatment tank (2), characterized in that: The filter assembly (4) specifically includes a fixed plate (41) disposed in the primary processing box (1) and the secondary processing box (2), a front movable plate (42) and a rear movable plate (43) disposed above the fixed plate (41). The first-stage treatment box (1) and the second-stage treatment box (2) are respectively provided with an inlet and an outlet at their left and right ends. The diversion component (5) is located between the inlet and the filter component (4). The fixed plate (41), the front movable plate (42), and the rear movable plate (43) are assembled into a "V" shape, and the opening of the "V" faces the inlet. The filter assembly (4) further includes a sliding groove (44) opened on the top of the fixed plate (41), a sliding block (45) disposed inside the sliding groove (44), a movable connector (46) disposed between the front movable plate (42) and the slot (7), between the front movable plate (42) and the rear movable plate (43), and between the rear movable plate (43) and the sliding block (45), a mating hole (47) opened on the top of the fixed plate (41), an offset hole (48) opened on the top of the front movable plate (42), a control shaft (49) passing through the mating hole (47) and the offset hole (48), and a fixed connector (410) disposed between the control shaft (49) and the front movable plate (42). The mating hole (47) and the offset hole (48) are located on the same vertical line. The diameter of the mating hole (47) is the same as the diameter of the control shaft (49), and the diameter of the offset hole (48) is greater than the diameter of the control shaft (49). The front movable plate (42) and the rear movable plate (43) use three movable connectors (46) to realize the change between the two states.

2. The acidic waste gas treatment system based on chemical environmental protection production according to claim 1, characterized in that: The front movable plate (42), the rear movable plate (43) and the fixed plate (41) are symmetrically arranged, and the axis of symmetry remains horizontal.

3. The acidic waste gas treatment system based on chemical environmental protection production according to claim 1, characterized in that: The movable connector (46) includes a first hinge (461) and a second hinge (462), and a sealing element (463) disposed on the outside of the first hinge (461) and the second hinge (462). The sealing element (463) is divided into three parts: two hard rubber pieces and one flexible rubber piece. The two hard rubber pieces correspond to hinge one (461) and hinge two (462) respectively, and the flexible rubber piece connects the two hard rubber pieces.

4. The acidic waste gas treatment system based on chemical environmental protection production according to claim 3, characterized in that: The flexible rubber portion of the seal (463) is a trapezoid with one open end, and the two sides of the trapezoid are connected to two hard rubber pieces respectively.

5. The acidic waste gas treatment system based on chemical environmental protection production according to claim 1, characterized in that: The fixed plate (41), the front movable plate (42) and the rear movable plate (43) are assembled to form a filter unit. There are no less than two filter units in the primary treatment box (1). The fixed plates (411) of adjacent filter units are fixedly connected to each other.

6. The acidic waste gas treatment system based on chemical environmental protection production according to claim 1, characterized in that: The fixed connector (410) includes a lower fixing ring (4101) disposed on the upper surface of the front movable plate (42), an elastic ring (4102) disposed on the top of the control shaft (49), and an upper fixing ring (4103) disposed on the top of the elastic ring (4102). The inner diameter of the lower fixing ring (4101) is the same as that of the offset hole (48), and the upper fixing ring (4103) is threadedly connected to the control shaft (49).

7. The acidic waste gas treatment system based on chemical environmental protection production according to claim 1, characterized in that: The diversion component (5) specifically includes a diversion plate (51) disposed in the slot (7), a guide plate (52) disposed on the side of the diversion plate (51), and flow holes (53) opened on the surfaces of the diversion plate (51) and the guide plate (52). The guide plate (52) protrudes towards the inlet of the primary processing box (1) and is in the shape of a quadrangular pyramid. The flow holes (53) on the surfaces of the diversion plate (51) and the guide plate (52) overlap.

8. The acidic waste gas treatment system based on chemical environmental protection production according to claim 1, characterized in that: The fixed plate (41), the front movable plate (42) and the rear movable plate (43) are all divided into two parts: a frame and an activated carbon filling layer. When the front movable plate (42) and the rear movable plate (43) change between the two states, the flow holes (53) avoid the frame and the carbon filling layer.

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