Waste gas treatment equipment in 1, 4-butylene glycol production process

Abstract

The invention belongs to the technical field of waste gas treatment, and discloses waste gas treatment equipment in a 1, 4-butylene glycol production process, which comprises a waste gas recovery tank which is a hollow titanium tank, and further comprises a primary treatment mechanism which is connected to the top of the waste gas recovery tank, through cooperation of the turn-back groove, the gradual change filter elements, the semicircular filter elements and other structures, when tail gas enters the turn-back groove, the two sides of the tail gas pass through an adsorption filter layer formed by matching the gradual change filter elements with the semicircular filter elements in a staggered mode, and due to the fact that the areas of the multiple layers of gradual change filter elements are overlapped from bottom to top in a gradually increasing mode, the whole body can form an inverted conical tower shape; therefore, the adsorption area of the outer surface of the gradual change filter element is effectively increased, the filtering time can be effectively prolonged, the maintenance frequency is reduced, the filtering speed and the filtering effect of the gradual change filter element are inconsistent due to the inconsistent thicknesses of the filtering layers, impurity particles distributed in tail gas form disturbance, and the side adsorbability of the gradual change filter element is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of waste gas treatment, and in particular relates to waste gas treatment equipment in the production process of 1,4-butenediol. Background Art

[0002] In the production process of 1,4-butenediol, some process steps may be carried out under vacuum conditions, thereby generating tail gas containing water vapor and other condensable gases. Therefore, waste gas treatment equipment is required to recover these gases. Currently, the waste gas is captured and recovered by titanium tail gas recovery tanks, which can not only reduce environmental pollution, but also realize resource reuse and reduce production costs.

[0003] In the existing technology, the titanium tail gas recovery tank uses the low temperature effect of the refrigeration coil to work. The refrigerant circulates in the coil to reduce the temperature in the recovery tank. When the tail gas enters the recovery tank, the water vapor and other condensable gases in it come into contact with the low-temperature surface, condense into liquid and collect at the bottom of the tank, while the small amount of non-condensable tail gas is discharged through the top vacuum port and reaches the adsorption tank to adsorb the waste gas, ensuring the stable operation of the system. However, the current adsorption device is mostly set to a straight-through type. Even if it is filtered and adsorbed through multiple layers of filter elements, the gas leakage process is relatively fast, which can easily lead to incomplete adsorption, or impurity particles accumulate on the surface of the filter element, causing the filter element to be easily blocked and replaced frequently. Summary of the Invention

[0004] In order to solve the problems raised in the above background technology that the exhaust gas escape process is fast, which easily leads to incomplete adsorption, or impurity particles accumulate on the surface of the filter element, resulting in easy clogging and frequent replacement of the filter element, the present invention provides an exhaust gas treatment equipment in the production process of 1,4-butenediol.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: an exhaust gas treatment device in the production process of 1,4-butenediol, comprising an exhaust gas recovery tank, wherein the exhaust gas recovery tank is configured as a hollow titanium tank, and further comprising: A primary treatment mechanism connected to the top of the exhaust gas recovery tank; a secondary processing mechanism connected to the top of the primary processing mechanism; Wherein, the primary treatment mechanism includes a return adsorption element and a disturbance filter element; The return adsorption component includes a return groove opened in the middle inner cavity of the primary treatment mechanism, and the disturbance filter component includes a gradient filter element evenly distributed in the inner cavity of the primary treatment mechanism, and the gradient filter element is staggered and symmetrically arranged in no less than two pairs.

[0006] Preferably, the folding adsorption component also includes a vertical shell fixedly connected to the top of the exhaust gas recovery tank, and a plurality of slots are arranged on both sides of the vertical shell in a transversely staggered manner. The vertical shell is slidably connected to a semicircular bracket through the slots, and the upper and lower ends of the semicircular bracket are both abutted against the inner cavity of the vertical shell through rubber sealing rings.

[0007] Preferably, the folding grooves are both connected to the semicircular bracket and the clamping slot, and a handle is fixedly connected to the outer wall of the semicircular bracket.

[0008] Preferably, the disturbance filter element also includes a pair of protective orifice plates symmetrically fixed to the inner cavity of the semicircular bracket, and no less than two pairs of support plates are symmetrically fixed on both sides of the protective orifice plates below. A layer of gradient filter element is clamped in the middle of each pair of support plates, and the areas of the multiple layers of gradient filter elements are overlapped with each other in a gradually increasing manner from bottom to top.

[0009] Preferably, the top of the gradient filter element is abutted against a double-layer semicircular filter element, the top of the semicircular filter element is abutted against the bottom of the upper protective hole plate, and the gradient filter element and the semicircular filter element are both folded in a wave shape.

[0010] Preferably, the curvature of the inner cavity of the support plate is consistent with the corners of the gradient filter element, the inner surface of the support plate is fixedly connected with a baffle, and the top of the baffle abuts against the edge of the gradient filter element.

[0011] Preferably, the secondary treatment mechanism includes a straight-through shell fixed to the top of the vertical shell, the top of the straight-through shell is fixed with an exhaust hood by bolts, and the exhaust hood and the straight-through shell are connected to each other, and the inner cavity at the lower end of the exhaust hood is fixed with a limiting retaining ring.

[0012] Preferably, the top of the vertical shell is fixedly connected to an inner mesh sleeve, the outer wall of the inner mesh sleeve is sleeved with a sleeve filter element, the outer wall of the sleeve filter element is sleeved with an outer mesh sleeve, the bottom of the outer mesh sleeve is fixed to the vertical shell, and the outer mesh sleeve and the inner surface of the straight-through shell form an annular cavity.

[0013] Preferably, the top of the inner mesh sleeve and the top of the outer mesh sleeve are jointly clamped with a top cover, the outer wall of the top cover is equidistantly fixed with multiple columns, the outer walls of the columns are in contact with the limit ring, the top of the top cover is installed with fan blades by bolts, and the motor of the fan blades is connected to an external power supply.

[0014] Preferably, the sleeve filter element is formed by multiple layers of different thicknesses, and the thickness decreases from the inside to the outside. The sleeve filter element is also folded in a wave shape.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The present invention facilitates the timeliness and adsorption effect of the filter element in adsorbing the exhaust gas by setting up the coordination of structures such as the return groove, the gradient filter element and the semicircular filter element. The exhaust gas enters the return groove, and the two sides are staggered through the adsorption filter layer composed of the gradient filter element and the semicircular filter element. Since the areas of the multiple layers of gradient filter elements are overlapped with each other in a gradually increasing manner from bottom to top, the whole can form an inverted cone tower shape, thereby effectively increasing the adsorption area of the outer surface of the gradient filter element. Compared with the traditional flat filter layer, it can effectively extend the filtration time and reduce the maintenance times. Moreover, due to the inconsistent thickness of the filter layer, the filtration speed and effect are also inconsistent. The impurity particles distributed in the exhaust gas form a disturbance, which improves the side adsorption of the gradient filter element and effectively avoids the clogging of the filter layer.

[0016] The present invention facilitates the long-term use of the filter layer by arranging the coordination of the sleeve filter element, the inner mesh sleeve and the outer mesh sleeve. The exhaust gas is filtered in stages, and the secondary exhaust gas already contains a very small amount of impurity particles. The fan blades on the top continuously rotate, so that the inner cavity of the inner mesh sleeve and the annular cavity of the straight-through shell both generate negative pressure, thereby increasing the airflow speed. Since the sleeve filter element is formed by multiple layers of different thicknesses, and the thickness decreases from the inside to the outside, combined with its wavy folding setting, it can effectively reduce the accumulation of exhaust gas particles and avoid the leakage of small molecular particles, thereby improving the filtration quality without reducing the exhaust speed.

[0017] The present invention facilitates the installation and disassembly process of the device components by arranging the cooperation of structures such as a semicircular bracket, a limit retaining ring and a column. Not only can the protective hole plate be removed and the gradient filter element and the semicircular filter element in the middle be removed and replaced in turn, but the fan blades and the top cover can also be removed together, so that the sleeve filter element can be removed for cleaning or replacement, which is beneficial to the later maintenance of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the cross-sectional structure of the present invention; Figure 2 For the present invention Figure 1 A schematic diagram of the partially enlarged structure at center A; Figure 3 This is a schematic diagram of the structural coordination relationship between the protective orifice plate and the through-shell of the present invention; Figure 4 This is a schematic diagram of the structural coordination relationship between the semicircular bracket and the protective orifice plate of the present invention; Figure 5 For the present invention Figure 4 A schematic diagram of the partially enlarged structure at point B in the middle; Figure 6 This is a schematic diagram of the structural coordination relationship between the gradient filter element and the semicircular filter element of the present invention; Figure 7 Schematic diagram of the structural coordination relationship between the support plate and the protective hole plate of the present invention; Figure 8 Schematic diagram of the structural coordination relationship between the support plate and the baffle of the present invention; Figure 9 This is a schematic diagram of the three-dimensional structure of the gradient filter element of the present invention when viewed from above; Figure 10 This is a schematic diagram of the structural coordination relationship between the top cover and the inner mesh sleeve of the present invention; Figure 11 A schematic diagram of the structural coordination relationship between the upright column and the top cover of the present invention; Figure 12 It is a schematic diagram of the structural coordination relationship between the inner mesh sleeve and the sleeve filter element of the present invention.

[0019] In the picture: 1. Waste gas recovery tank; 2. Primary treatment mechanism; 21. Return adsorption element; 211. Vertical shell; 212. Return groove; 213. Semicircular bracket; 214. Rubber sealing ring; 215. Handle; 22. Disturbance filter element; 221. Protective hole plate; 222. Support plate; 223. Gradient filter element; 224. Semicircular filter element; 225. Baffle; 3. Secondary treatment mechanism; 31. Straight-through shell; 32. Exhaust hood; 33. Limit retaining ring; 34. Fan blade; 35. Top cover; 36. Column; 37. Inner mesh sleeve; 38. Sleeve filter element; 39. Outer mesh sleeve. DETAILED DESCRIPTION

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] like Figures 1 to 12 As shown, the present invention provides a waste gas treatment device in the production process of 1,4-butenediol, including a waste gas recovery tank 1, which is configured as a hollow titanium tank and further includes: The primary treatment mechanism 2 is connected to the top of the waste gas recovery tank 1; The secondary processing mechanism 3 is connected to the top of the primary processing mechanism 2; The primary treatment mechanism 2 includes a return adsorption element 21 and a disturbance filter element 22; The return adsorption element 21 includes a return groove 212 opened in the middle inner cavity of the primary treatment mechanism 2, and the disturbance filter element 22 includes a gradient filter element 223 evenly distributed in the inner cavity of the primary treatment mechanism 2, and the gradient filter element 223 is staggered and symmetrically arranged in no less than two pairs.

[0022] The above scheme is adopted: using graded filtration of the primary treatment mechanism 2 and the secondary treatment mechanism 3, when the exhaust gas enters the waste gas recovery tank 1, the water vapor and other condensable gases therein come into contact with the low-temperature surface, and will condense into liquid and collect at the bottom of the tank, and the impurity particles in the remaining small amount of non-condensable exhaust gas are fully adsorbed, thereby improving the exhaust gas emission standards.

[0023] like Figures 3 to 5 As shown, the folding adsorption component 21 also includes a vertical shell 211 fixedly connected to the top of the exhaust gas recovery tank 1. A plurality of card slots are horizontally staggered on both sides of the vertical shell 211. The vertical shell 211 is slidably connected to a semicircular bracket 213 through the card slot. The upper and lower ends of the semicircular bracket 213 are both in contact with the inner cavity of the vertical shell 211 through a rubber sealing ring 214; the folding grooves 212 are connected to the semicircular bracket 213 and the card slot, and the outer wall of the semicircular bracket 213 is fixed with a handle 215.

[0024] The above solution is adopted: the shape of the rubber sealing ring 214 is consistent with the semicircular bracket 213, and is in the shape of a semicircular ring. After the semicircular bracket 213 is assembled into the card slot, the rubber sealing ring 214 fills the card gap and limits the anti-detachment, thereby avoiding exhaust gas leakage during the later filtration process. At the same time, it is convenient to independently disassemble and replace the semicircular bracket 213, and an additional set of spare replacement semicircular brackets 213 and middle filter elements are provided, which are convenient for disassembly and cleaning, and use of spare components, thereby avoiding equipment shutdown.

[0025] like Figures 6 to 9 As shown, the disturbance filter element 22 also includes a pair of protective orifice plates 221 symmetrically fixed to the inner cavity of the semicircular bracket 213, and no less than two pairs of support plates 222 are symmetrically fixed on both sides of the lower protective orifice plate 221. A layer of gradient filter element 223 is clamped in the middle of each pair of support plates 222, and the areas of the multiple layers of gradient filter elements 223 are overlapped with each other in a gradually increasing manner from bottom to top.

[0026] like Figure 8 As shown, the top of the gradient filter element 223 is abutted against a double-layer semicircular filter element 224, and the top of the semicircular filter element 224 is abutted against the bottom of the upper protective hole plate 221. The gradient filter element 223 and the semicircular filter element 224 are both folded in a wave shape; the curvature of the inner cavity of the support plate 222 is consistent with the corners of the gradient filter element 223, and the inner surface of the support plate 222 is fixed with a baffle 225, and the top of the baffle 225 is abutted against the edge of the gradient filter element 223.

[0027] The above solution is adopted: multiple layers of gradient filter elements 223 together form an inverted cone tower shape, which effectively increases the surface area of the adsorption surface, and the overlapping gaps can accommodate the accumulation of more exhaust particles. Compared with the traditional flat filter layer, the gradient filter element 223 combined with the semicircular filter element 224 can effectively extend the filtration time and reduce the number of maintenance times. Moreover, after the exhaust gas passes through the gradient filter element 223 and the semicircular filter element 224, due to the inconsistent thickness of the filter layer, the filtration speed and effect are also inconsistent, and the impurity particles distributed in the exhaust gas form a disturbance, thereby avoiding the uniform accumulation of impurities on the surface of the traditional flat filter element. After the same number of filtrations, the filtration speed is better maintained than that of the traditional filter element of equal thickness.

[0028] like Figures 10 to 12 As shown, the secondary treatment mechanism 3 includes a straight-through shell 31 fixedly connected to the top of the vertical shell 211, and an exhaust hood 32 is fixedly connected to the top of the straight-through shell 31 by bolts, and the exhaust hood 32 and the straight-through shell 31 are communicated with each other, and the inner cavity of the lower end of the exhaust hood 32 is fixedly connected to a limit retaining ring 33; the top of the vertical shell 211 is fixedly connected to an inner mesh sleeve 37, the outer wall of the inner mesh sleeve 37 is sleeved with a sleeve filter element 38, the outer wall of the sleeve filter element 38 is sleeved with an outer mesh sleeve 39, the bottom of the outer mesh sleeve 39 is fixed to the vertical shell 211, and the outer mesh sleeve 39 and the inner surface of the straight-through shell 31 form an annular cavity.

[0029] like Figure 11 and Figure 12 As shown, the top of the inner mesh sleeve 37 and the outer mesh sleeve 39 are jointly clamped with a top cover 35, and a plurality of columns 36 are fixedly connected to the outer wall of the top cover 35 at equal intervals. The outer wall of the column 36 is in contact with the limit ring 33, and the top of the top cover 35 is fixed with a fan blade 34 by bolts, and the motor of the fan blade 34 is connected to an external power supply; the sleeve filter element 38 is formed by multiple layers of different thicknesses, and the thickness decreases from the inside to the outside, and the sleeve filter element 38 is also folded in a wave shape.

[0030] The above solution is adopted: the material of the limit ring 33 is a wear-resistant rubber layer, which is used to abut the column 36, thereby ensuring the stable connection between the top cover 35 and the inner mesh sleeve 37 and the outer mesh sleeve 39. In addition, the wear-resistant rubber layer can adopt a hydrogenated nitrile rubber base material, which is modified by nano-silicon dioxide. While maintaining the Shore A75 hardness, it achieves excellent mechanical properties of tensile strength ≥25MPa and tear strength ≥90kN / m, and can also have a certain buffering effect on the rotational vibration of the fan blade 34, thereby reducing the wear of the inner mesh sleeve 37 and the outer mesh sleeve 39.

[0031] The working principle and use process of the present invention: First, when the exhaust gas enters the exhaust gas recovery tank 1, the water vapor and other condensable gases in it come into contact with the low-temperature surface, condense into liquid and collect at the bottom of the tank, while the small amount of non-condensable exhaust gas is discharged through the top, first reaching the primary treatment mechanism 2, and then passing through the secondary treatment mechanism 3 after filtration, and finally discharged above the exhaust hood 32; Secondly, after the non-condensable tail gas enters the primary treatment mechanism 2, with the setting of the return groove 212, the tail gas is Figure 3 The exhaust gas moves in the direction indicated by the arrow, and passes through multiple pairs of gradient filter elements 223 and semicircular filter elements 224 in a reciprocating manner from bottom to top, effectively slowing down the filtration speed and allowing the impurity particles in the exhaust gas to be fully absorbed. Every time the exhaust gas reaches the semicircular bracket 213, it needs to first pass through the protective hole plate 221 below, and then pass through the gradient filter element 223 for adsorption. Since the areas of the multiple layers of gradient filter elements 223 are overlapped with each other in a gradually increasing manner from bottom to top, the whole can form an inverted cone tower shape, thereby effectively increasing the adsorption area of the outer surface of the gradient filter element 223, and the overlapping gaps can accommodate more accumulation of exhaust gas particles. Compared with the traditional flat filter layer, the gradient filter element 223 combined with the semicircular filter element 224 can effectively extend the filtration time. Moreover, after the exhaust gas passes through the gradient filter element 223 and the semicircular filter element 224, due to the inconsistent filter layer thickness, the filtration speed and effect are also inconsistent. The impurity particles distributed in the exhaust gas form a disturbance, which improves the side adsorption of the gradient filter element 223. Again, the tail gas after being adsorbed by the primary treatment mechanism 2 is basically clean, and the secondary tail gas with very little impurity particles enters the straight-through shell 31 and is Figure 12 In the direction indicated by the arrow, the air enters through the inner cavity of the inner mesh sleeve 37, passes through the sleeve filter element 38 for filtration, and is then introduced into the exhaust hood 32 from the annular cavity of the straight-through shell 31. During this process, the fan blades 34 at the top continuously rotate, so that the inner cavity of the inner mesh sleeve 37 and the annular cavity of the straight-through shell 31 both generate negative pressure, thereby increasing the air flow speed and quickly completing the secondary filtration process. Moreover, since the sleeve filter element 38 is formed by multiple layers of different thicknesses, and the thickness decreases from the inside to the outside, combined with its wavy folding arrangement, the inner layer of the sleeve filter element 38 has more gaps and deeper folds, and the accumulation of exhaust particles increases. The outer layer has shallow folds and a larger relative density, which avoids the leakage of small molecular particles and adsorption. In the secondary filtration process with very few impurity particles, the long-term use effect of the filter layer can be achieved. Finally, the device adopts a modular quick-disassembly design, which significantly optimizes the subsequent maintenance process. The maintenance personnel can first pull out the semicircular bracket 213 horizontally through the handle 215. The structure is independently packaged by the rubber sealing ring 214, so that the filter layer can be cleaned specifically to avoid interference with other components caused by the overall disassembly. When the filter material needs to be replaced, it is only necessary to loosen the fastening bolts of the protective hole plate 221 to take out the gradient filter element 223 and the semicircular filter element 224 in turn. The secondary filter unit can be lifted up as a whole by unbolting the bolts of the exhaust cover 32 and removing the limit ring 33. At this time, the sleeve filter element 38 can be slid out along the guide shaft. This hierarchical maintenance system shortens the daily maintenance working hours, extends the replacement cycle of key filter materials, and significantly improves the management efficiency of the equipment throughout its life cycle.

[0032] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0033] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A waste gas treatment device in the production process of 1,4-butenediol, comprising a waste gas recovery tank (1), wherein the waste gas recovery tank (1) is configured as a hollow titanium tank, characterized in that: Also includes: A primary treatment mechanism (2), the primary treatment mechanism (2) being connected to the top of the waste gas recovery tank (1); A secondary processing mechanism (3), the secondary processing mechanism (3) being connected to the top of the primary processing mechanism (2); Wherein, the primary treatment mechanism (2) comprises a return adsorption element (21) and a disturbance filter element (22); The folding adsorption element (21) comprises a folding groove (212) provided in the middle inner cavity of the primary treatment mechanism (2), and the disturbance filter element (22) comprises a gradient filter element (223) evenly distributed in the inner cavity of the primary treatment mechanism (2), and the gradient filter element (223) is staggered and symmetrically arranged in at least two pairs.

2. The waste gas treatment equipment in the production process of 1,4-butenediol according to claim 1, characterized in that: The folding adsorption member (21) further comprises a vertical shell (211) fixedly connected to the top of the exhaust gas recovery tank (1), a plurality of slots being staggered transversely on both sides of the vertical shell (211), the vertical shell (211) being slidably engaged with a semicircular bracket (213) through the slots, and the upper and lower ends of the semicircular bracket (213) being in contact with the inner cavity of the vertical shell (211) via a rubber sealing ring (214).

3. The waste gas treatment equipment in the production process of 1,4-butenediol according to claim 2, characterized in that: The folding grooves (212) are both connected to the semicircular bracket (213) and the clamping groove, and a handle (215) is fixedly connected to the outer wall of the semicircular bracket (213).

4. The waste gas treatment equipment in the production process of 1,4-butenediol according to claim 3, characterized in that: The disturbance filter element (22) further comprises a pair of protective orifice plates (221) symmetrically fixed to the inner cavity of the semicircular bracket (213), and at least two pairs of support plates (222) are symmetrically fixed to both sides of the protective orifice plates (221) below, and a layer of gradient filter element (223) is clamped in the middle of each pair of support plates (222), and the areas of the multiple layers of gradient filter element (223) are overlapped with each other in a gradually increasing manner from bottom to top.

5. The waste gas treatment equipment in the production process of 1,4-butenediol according to claim 4, characterized in that: The top of the gradient filter element (223) is in contact with a double-layer semicircular filter element (224), and the top of the semicircular filter element (224) is in contact with the bottom of the upper protective orifice plate (221). Both the gradient filter element (223) and the semicircular filter element (224) are folded in a wave shape.

6. The waste gas treatment equipment in the production process of 1,4-butenediol according to claim 5, characterized in that: The curvature of the inner cavity of the support plate (222) is consistent with the corners of the gradient filter element (223), and the inner surface of the support plate (222) is fixedly connected with a baffle (225), and the top of the baffle (225) is in contact with the edge of the gradient filter element (223).

7. The waste gas treatment equipment in the production process of 1,4-butenediol according to claim 2, characterized in that: The secondary treatment mechanism (3) comprises a straight-through shell (31) fixed to the top of the vertical shell (211); an exhaust hood (32) is fixed to the top of the straight-through shell (31) by bolts, and the exhaust hood (32) and the straight-through shell (31) are communicated with each other; a limit retaining ring (33) is fixed to the inner cavity of the lower end of the exhaust hood (32).

8. The waste gas treatment equipment in the production process of 1,4-butenediol according to claim 7, characterized in that: The top of the vertical shell (211) is fixedly connected to an inner mesh sleeve (37), the outer wall of the inner mesh sleeve (37) is sleeved with a sleeve filter element (38), the outer wall of the sleeve filter element (38) is sleeved with an outer mesh sleeve (39), the bottom of the outer mesh sleeve (39) is fixedly connected to the vertical shell (211), and the outer mesh sleeve (39) and the inner surface of the straight shell (31) form an annular cavity.

9. The waste gas treatment equipment in the production process of 1,4-butenediol according to claim 8, characterized in that: The top of the inner mesh sleeve (37) and the top of the outer mesh sleeve (39) are jointly clamped with a top cover (35), and the outer wall of the top cover (35) is fixedly connected with a plurality of columns (36) at equal intervals, and the outer wall of the column (36) is in contact with the limit ring (33). The top of the top cover (35) is fixed with a fan blade (34) by means of bolts, and the motor of the fan blade (34) is externally connected to a power supply.

10. The waste gas treatment equipment in the 1,4-butenediol production process according to claim 9, characterized in that: The sleeve filter core (38) is formed by multiple layers of different thicknesses, and the thickness decreases from the inside to the outside. The sleeve filter core (38) is also folded in a wave shape.

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