Acrylate production waste gas filtering and purifying equipment

Abstract

The invention relates to the technical field of acrylate preparation, and discloses acrylate production waste gas filtering and purifying equipment which comprises a tower body, a central column coinciding with the central axis of the tower body is arranged in the tower body, the bottom of the central column is connected with a driving mechanism for driving the central column to rotate, and spraying mechanisms are evenly connected to the central column. The tower body is connected with a gas-liquid conveying mechanism; wherein the spraying mechanism comprises an inner connecting frame, the inner connecting frame is fixedly arranged on the central column in a sleeving mode, and a flow dividing assembly is connected to the inner connecting frame. The acrylic ester production waste gas filtering and purifying equipment can effectively solve the problems that in the prior art, due to the fact that the position of a spray head in a conventional spray tower is fixed, the coverage range of alkali liquor is different, acid gas and alkali liquor react to generate salt crystals, the spray head is prone to being blocked, the spraying amount is reduced, and gas-liquid distribution is uneven. And if serious, shutdown cleaning is needed, so that the waste gas treatment process is interrupted.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of acrylate production, and particularly relates to an acrylate production waste gas filtering and purifying device. BACKGROUND

[0002] Acrylate refers to ester compounds generated by reaction of acrylic acid and its derivatives with alcohols, and is widely used in many fields such as coatings, adhesives and sealants, plastics and resins, textiles and leather, etc.

[0003] The production and preparation thereof takes esterification reaction as the core, and industrial production is mostly continuous process. The core process is that under the action of a catalyst, acrylic acid and corresponding alcohols undergo esterification to generate target esters, and high-purity products are obtained after separation and purification. In the preparation process of acrylate, waste gas mainly containing volatile organic compounds (VOCs) is generated, and part of the acid gas is contained in the waste gas. If such waste gas is directly discharged into the atmosphere without effective treatment, it will cause serious harm to the ecological environment. Before the VOCs treatment process, the acid gas in the waste gas needs to be removed first, otherwise if the acid gas enters the subsequent treatment equipment (such as activated carbon adsorption tower, catalytic combustion reactor, etc.), it will cause equipment corrosion and reduce the treatment efficiency.

[0004] At present, the main method for removing acid gas is spray tower absorption process. Such spray tower usually continuously sprays lye downward through multiple layers of staggered spray pipes matched with spray heads. When the waste gas flows through the lye, the acid gas in the waste gas is removed by absorption. However, due to the fixed position of the spray head, the coverage range of the lye is different, and the reaction of the acid gas with the lye can generate salt crystals, which can easily cause the spray head to be blocked, thereby causing problems such as reduction of spray amount, uneven gas-liquid distribution, etc. In severe cases, it needs to be stopped for cleaning, which causes the waste gas treatment process to be interrupted. SUMMARY

[0005] In view of the above-mentioned shortcomings of the prior art, the present application provides an acrylate production waste gas filtering and purifying device, which can effectively solve the problem that in the prior art, the position of the spray head in the conventional spray tower is fixed, resulting in different coverage ranges of the lye, and the reaction of the acid gas with the lye can generate salt crystals, which can easily cause the spray head to be blocked, thereby causing problems such as reduction of spray amount, uneven gas-liquid distribution, etc. In severe cases, it needs to be stopped for cleaning, which causes the waste gas treatment process to be interrupted.

[0006] To achieve the above-mentioned purposes, the present application is implemented by the following technical solutions:

[0007] The present application provides an acrylate production waste gas filtering and purifying device, comprising:

[0008] A tower body is provided with a central column coinciding with its axis, the bottom of the central column is connected with a driving mechanism for driving the rotation of the central column, the central column is uniformly connected with a spraying mechanism, and the tower body is connected with a gas-liquid conveying mechanism;

[0009] The spraying mechanism comprises an inner connecting frame fixedly sleeved on the central column, and a shunt assembly for receiving lye and making the excess lye converge to the center and fall is connected to the inner connecting frame, a receiving assembly for receiving the lye overflowing from the center above is connected to the central column below the inner connecting frame, and the receiving assembly is connected with the tower body through an outer connecting frame.

[0010] The shunt assembly comprises an inner ring plate one fixedly connected to the outer side of the inner connecting frame, and an inner ring plate one is symmetrically sleeved on the outer side of the inner ring plate one, the shunt plate is annular and is provided with a plurality of circumferentially uniformly arranged through holes from inside to outside, and a lifting module one for periodically changing the distance between the two shunt plates and a dredging module one for cleaning the through holes are commonly connected between the two shunt plates.

[0011] Further, the upper shunt plate is connected to the inner ring plate one in sliding connection, the lower shunt plate is fixedly connected to the inner ring plate one, and the outer edge of the lower shunt plate is rotatably connected with an outer ring plate one.

[0012] Further, the lower end of the inner ring plate one is flush with the outer ring plate one, and the upper end of the inner ring plate one is lower than the upper end of the outer ring plate one.

[0013] Further, the lifting module one comprises an annular frame fixedly connected to the upper end of the upper shunt plate, the circumferential outer surface of the annular frame is provided with a guide groove, the circumferential inner surface of the outer ring plate one is fixedly connected with a slide column, and the guide groove comprises two horizontal segments and two V-shaped segments, the horizontal segments and the V-shaped segments are staggered and connected with each other.

[0014] Further, the through holes on the upper shunt plate and the lower shunt plate correspond one by one, the dredging module one is connected in each circle of the through holes on the shunt plate, and the dredging module one on the upper shunt plate and the lower shunt plate are oppositely arranged.

[0015] Further, the dredging module one comprises a connecting column coaxially fixedly connected in the through hole, a rotating seat is slidably connected to the connecting column through a return spring, the upper end of the rotating seat is fixedly connected with a baffle, and the edges of the rotating seat and the baffle are uniformly provided with a notch along the circumference.

[0016] Further, the circumferential outer surface of the connecting column is uniformly provided with an inclined groove along the circumference, and the circumferential inner surface of the rotating seat is uniformly fixedly connected with a columnar block connected with the inclined groove.

[0017] Further, the receiving assembly comprises an inner ring plate two fixedly sleeved on the central column, and a receiving plate is symmetrically sleeved on the inner ring plate two, the receiving plate is circular in design and is provided with a plurality of circumferentially uniformly distributed flow channels from inside to outside, the upper receiving plate is slidably connected to the inner ring plate two, and the lower receiving plate is fixedly connected to the inner ring plate two, and the outer edge of the lower receiving plate is rotatably connected to an outer ring plate two, the outer ring plate two is fixedly connected to the tower body through an outer connecting frame, and the outer ring plate two and the receiving plate are jointly connected to a lifting module two and a dredging module two which are the same as the lifting module one and the dredging module one.

[0018] Further, the driving mechanism comprises a driving motor fixedly connected to the lower end of the tower body through a protective shell, and the driving shaft of the driving motor penetrates through the protective shell and is fixedly connected to the central column.

[0019] Further, the gas-liquid conveying mechanism comprises an air inlet pipe fixedly connected to the lower end of the tower body, an air outlet pipe fixedly connected to the top of the tower body, a liquid inlet pipe fixedly connected to the upper end of the tower body, and a liquid outlet pipe fixedly connected to the lower end of the tower body.

[0020] Compared with the prior art, the technical scheme provided by the present application has the following beneficial effects:

[0021] 1. The embodiment drives the central column to rotate through the driving mechanism, thereby driving the shunt assembly and the receiving assembly to rotate synchronously, forming a rotating spraying posture. At the same time, the interior of the tower body is divided into alternating channels by the shunt assembly and the receiving assembly arranged alternately in multiple layers, and the waste gas needs to pass through the edge region of the receiving assembly and the central region of the shunt assembly in turn when rising, thereby significantly prolonging the residence time. The lye falls in layers through the through holes or flow channels on the shunt plate and the receiving plate on one hand, and the excess lye will overflow to form an annular liquid curtain on the other hand. The rotating spraying is combined with the multiple liquid curtains, which greatly expands the gas-liquid contact area, so that the acid gas and the lye can fully react, and the absorption efficiency is greatly improved.

[0022] 2. In view of the problem that the existing technology is prone to being blocked by salt crystals, the equipment is provided with a lifting module and a dredging module in the shunt assembly and the receiving assembly. When the central column rotates, the lifting columns of the lifting module one and the lifting module two slide along the guide grooves, thereby periodically changing the spacing between the upper and lower shunt plates and the receiving plates. When the spacing is reduced, the connecting columns of the dredging module one and the dredging module two are respectively inserted into the corresponding through holes or flow channels, and the rotary seat rotates under the cooperation of the inclined groove and the cylindrical block, and the edge thereof can scrape off the crystal deposits. This process does not need to stop, realizes automatic cleaning of the through holes and the flow channels, avoids reduction or interruption of the spraying amount, and guarantees long-term continuous operation of the equipment. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed in the embodiments or prior art description. Obviously, the drawings in the following description only show some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without any creative effort.

[0024] Figure 1 It is a schematic diagram of the overall structure of the embodiment of the present application.

[0025] Figure 2 It is a schematic diagram of the structure of the tower body, the center column, the driving mechanism and the spraying mechanism of the embodiment of the present application.

[0026] Figure 3 It is a schematic diagram of the structure of the driving mechanism, the center column and the spraying mechanism of the embodiment of the present application.

[0027] Figure 4 It is a schematic diagram of the structure of the center column and the spraying mechanism of the embodiment of the present application.

[0028] Figure 5 It is an exploded schematic diagram of the spraying mechanism of the embodiment of the present application.

[0029] Figure 6 It is a schematic diagram of the structure of the flow distribution plate, the annular frame and the guide groove of the embodiment of the present application.

[0030] Figure 7 It is a schematic diagram of the structure of the flow distribution plate and the unblocking module one of the embodiment of the present application.

[0031] Figure 8 It is an exploded schematic diagram of the unblocking module one of the embodiment of the present application.

[0032] The reference numbers in the drawings represent: 1, tower body; 2, center column; 3, driving mechanism; 31, driving motor; 32, protective shell; 4, spraying mechanism; 41, inner connecting frame; 42, flow distribution assembly; 421, inner ring plate one; 422, flow distribution plate; 423, through hole; 424, outer ring plate one; 425, lifting module one; 4251, annular frame; 4252, guide groove; 4253, sliding column; 426, unblocking module one; 4261, connecting column; 4262, reset spring; 4263, rotating seat; 4264, blocking piece; 4265, missing slot; 4266, inclined slot; 4267, cylindrical block; 43, receiving assembly; 431, inner ring plate two; 432, receiving plate; 433, flow channel; 434, outer ring plate two; 435, lifting module two; 436, unblocking module two; 44, outer connecting frame; 5, gas-liquid conveying mechanism; 51, gas inlet pipe; 52, gas outlet pipe; 53, liquid inlet pipe; 54, liquid outlet pipe. DETAILED DESCRIPTION

[0033] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0034] The present application will be further described below with reference to the embodiments.

[0035] Embodiment:

[0036] Please refer to Figure 1 - Figure 8 The present application provides a technical solution: an acrylic ester production waste gas filtering and purifying device, comprising:

[0037] A tower body 1 is provided with a central column 2 coinciding with the axis thereof, the bottom of the central column 2 is connected with a driving mechanism 3 for driving the rotation thereof, the central column 2 is uniformly connected with a spraying mechanism 4, and the tower body 1 is connected with a gas-liquid conveying mechanism 5.

[0038] The spraying mechanism 4 comprises an inner connecting frame 41 fixedly sleeved on the central column 2, and a shunt assembly 42 for receiving alkali liquor and making the excess alkali liquor converge and fall to the center is connected on the inner connecting frame 41, a receiving assembly 43 for receiving the alkali liquor overflowing from the center above is connected on the central column 2 at a position below the inner connecting frame 41, and the receiving assembly 43 is connected with the tower body 1 through an outer connecting frame 44.

[0039] The shunt assembly 42 comprises an inner ring plate one 421 fixedly connected on the outer side of the inner connecting frame 41, and a shunt plate 422 is symmetrically sleeved on the outer side of the inner ring plate one 421, the shunt plate 422 is annular and a plurality of through holes 423 uniformly arranged along the circumference are formed from inside to outside, and a lifting module one 425 for periodically changing the distance between the two shunt plates 422 and a dredging module one 426 for cleaning the through holes 423 are commonly connected between the two shunt plates 422.

[0040] The driving mechanism 3 comprises a driving motor 31 fixedly connected on the lower end of the tower body 1 through a protective shell 32, and the driving shaft of the driving motor 31 penetrates through the protective shell 32 and is fixedly connected with the central column 2.

[0041] The gas-liquid conveying mechanism 5 comprises an air inlet pipe 51 fixedly communicated with the lower end of the tower body 1, an air outlet pipe 52 fixedly communicated with the top of the tower body 1, a liquid inlet pipe 53 fixedly communicated with the upper end of the tower body 1, and a liquid outlet pipe 54 fixedly communicated with the lower end of the tower body 1.

[0042] Specifically, the driving motor 31 drives the central column 2 to rotate synchronously, and further drives the shunt assembly 42 and the receiving assembly 43 to rotate cooperatively. The waste gas generated in the production process is introduced into the bottom end of the tower body 1 through the air inlet pipe 51, and gradually rises under the negative pressure guidance of the external fan, and then enters the top air outlet pipe 52 after passing through the gaps between the shunt assemblies 42 and the receiving assemblies 43 in sequence. In this process, the multiple sets of shunt assemblies 42 and receiving assemblies 43 evenly arranged from top to bottom play a role of guiding and blocking, so that the waste gas can only pass through the edge of the tower body 1 when passing through the receiving assembly 43, and can only pass through the center of the tower body 1 when passing through the shunt assembly 42. By this structural design, the interior of the tower body 1 is divided into multiple layers of alternating channels, effectively prolonging the residence time of the waste gas in the tower body 1, and significantly improving the sufficiency of gas-liquid contact and the efficiency of acid gas absorption.

[0043] The liquid inlet pipe 53 is communicated with the external lye pool to convey the lye to the upper end of the tower body 1, and the lye falls into the upper receiving assembly 43 first. The lye conveying flow rate is set to be greater than the falling flow rate of the through hole 423 of the receiving assembly 43, so that the lye falls through the through hole 423 and fully contacts the waste gas rising along the edge of the tower body 1, and at the same time, a certain amount of lye is stored on the surface of the shunt plate 422; when the liquid level of the lye stored on the shunt plate 422 exceeds the inner ring plate one 421, the excess lye will converge to the center and overflow, falling to the lower receiving assembly 43, and then gradually falling through the receiving assembly 43 to contact the waste gas rising along the center of the tower body 1, realizing efficient absorption of acid gas.

[0044] In the process of driving the central column 2 to rotate by the driving motor 31, the shunt assembly 42 and the receiving assembly 43 are simultaneously driven to rotate, forming a rotating spraying posture, effectively expanding the lye spraying coverage, increasing the number of droplet dispersion, greatly improving the gas-liquid contact area, and further optimizing the absorption effect. At the same time, the rotating process of the shunt plate 422 drives the lifting module one 425 to operate, so that the distance between the upper and lower shunt plates 422 changes periodically; when the distance between the two shunt plates 422 is reduced, the unblocking module one 426 on one of the shunt plates 422 is inserted into the through hole 423 of the other shunt plate 422, realizing periodic cleaning of the through hole 423, effectively avoiding the deposition of crystal sediments generated by the reaction of lye and acid gas to block the through hole 423, and ensuring the stability of lye flow and long-term efficient operation of the equipment.

[0045] The upper shunt plate 422 is connected to the inner ring plate 421 in sliding mode, the lower shunt plate 422 is fixedly connected to the inner ring plate 421, and the outer edge of the lower shunt plate 422 is rotationally connected to the outer ring plate 424.

[0046] The lower end of the inner ring plate 421 is flush with the lower end of the outer ring plate 424, and the upper end of the inner ring plate 421 is lower than the upper end of the outer ring plate 424.

[0047] The lifting module 425 comprises a ring-shaped frame 4251 fixedly connected to the upper end of the upper shunt plate 422, a circumferential outer surface of the ring-shaped frame 4251 is provided with a guide groove 4252, a circumferential inner surface of the outer ring plate 424 is fixedly connected with a slide column 4253 in a symmetrical mode, and the guide groove 4252 comprises two horizontal segments and two V-shaped segments.

[0048] The through holes 423 on the upper shunt plate 422 and the lower shunt plate 422 correspond to each other, and the through holes 423 on each circle of the shunt plate 422 are connected with a dredging module 426 in a spaced mode, and the dredging modules 426 on the upper shunt plate 422 and the lower shunt plate 422 are oppositely arranged.

[0049] The dredging module 426 comprises a connecting column 4261 coaxially fixedly connected in the through hole 423, a rotary seat 4263 connected to the connecting column 4261 in a sliding mode through a return spring 4262, and a baffle 4264 fixedly connected to the upper end of the rotary seat 4263, and a plurality of lack grooves 4265 are uniformly arranged on the edge of the rotary seat 4263 and the baffle 4264 in a circumferential mode.

[0050] A plurality of inclined grooves 4266 are uniformly arranged on the circumferential outer surface of the connecting column 4261 in a circumferential mode, and a plurality of cylindrical blocks 4267 connected with the inclined grooves 4266 are fixedly connected to the circumferential inner surface of the rotary seat 4263 in a circumferential mode.

[0051] Specifically, when the central column 2 rotates under the drive of the motor 31, it drives the inner ring plate one 421 to rotate synchronously, and further drives the two shunt plates 422 connected thereto to rotate synchronously. During the rotation of the upper shunt plate 422, the annular frame 4251 rotates synchronously; since the outer ring plate one 424 is fixedly connected to the inner wall of the tower body 1, the sliding column 4253 at the outer end of the annular frame 4251 slides along the guide groove 4252 in the circumferential direction. When the sliding column 4253 is in the horizontal section of the guide groove 4252, the upper shunt plate 422 and the lower shunt plate 422 are in a state of moving away from each other, at this time, the lye falling to the upper shunt plate 422 will flow into the lower shunt plate 422 through the through hole 423, and then flow to the shunt plate 422 of the lower layer shunt assembly 42 through the through hole 423 of the lower shunt plate 422; the lye can form sufficient contact with the waste gas floating to the edge of the tower body 1 during the falling process, and efficiently absorb the acidic gas therein.

[0052] When the sliding column 4253 slides with the annular frame 4251 to the V-shaped section, the annular frame 4251 is lowered in height, driving the upper shunt plate 422 in the uppermost layer shunt assembly 42 to move downward synchronously; since the lower shunt plate 422 below is fixedly connected to the inner ring plate one 421, the distance between the upper and lower shunt plates 422 is reduced, so that the connecting column 4261 on the upper shunt plate 422 is precisely inserted into the through hole 423 of the lower shunt plate 422, and at the same time, the connecting column 4261 on the lower shunt plate 422 is also inserted into the through hole 423 of the upper shunt plate 422. During the insertion process, since the diameter of the baffle 4264 is greater than the diameter of the through hole 423, after the baffle 4264 connected to the upper connecting column 4261 contacts the lower shunt plate 422, the rotating seat 4263 cannot continue to move downward; as the upper connecting column 4261 continues to move downward, the rotating seat 4263 slides relative to the connecting column 4261, causing the cylindrical block 4267 to slide along the inclined groove 4266, and further driving the rotating seat 4263 to rotate in the through hole 423. When the rotating seat 4263 rotates, its edge can mechanically clean the crystals that may form in the through hole 423; similarly, the dredging module one 426 on the lower shunt plate 422 cleans the through hole 423 of the upper shunt plate 422 by the same principle, through this periodic mechanical dredging, effectively preventing the through hole 423 from being blocked by crystals, and ensuring the stability of the lye flow.

[0053] Since the upper end of the inner ring plate 421 is lower than the upper end of the outer ring plate 424, the lye input into the upper end of the tower body 1 through the liquid inlet pipe 53 enters the uppermost distribution plate 422, and when the lye continues to be input, when the lye on the distribution plate 422 is higher than the top end of the inner ring plate 421, the excess lye will overflow the upper end of the inner ring plate 421 and fall from the center of the tower body 1 and fall into the uppermost receiving assembly 43. The lye forms a ring-shaped liquid curtain during the falling process, and the waste gas must pass through the ring-shaped liquid curtain when it floats up, which significantly increases the gas-liquid contact area and contact time, further improving the absorption efficiency of the acid gas.

[0054] The receiving assembly 43 includes an inner ring plate 431 fixedly sleeved on the center column 2, and an inner ring plate 431 symmetrically sleeved on the inner ring plate 431. The receiving plate 432 is circularly designed and has a plurality of circumferentially uniformly distributed flow channels 433 formed therein from the inside to the outside. The upper receiving plate 432 is connected to the inner ring plate 431 in a sliding manner, and the lower receiving plate 432 is fixedly connected to the inner ring plate 431. The outer edge of the lower receiving plate 432 is rotatably connected to the outer ring plate 434, and the outer ring plate 434 is fixedly connected to the tower body 1 through the outer connecting frame 44. The outer ring plate 434 and the receiving plate 432 are jointly connected to the lifting module 435 and the dredging module 436, which have the same structure as the lifting module 425 and the dredging module 426.

[0055] Specifically, the lye falling from the center of the uppermost distribution assembly 42 flows into the uppermost receiving plate 432 and is stored in the cavity formed by the inner ring plate 431, the outer ring plate 434 and the receiving plate 432. Similar to the working mode of the distribution assembly 42, part of the lye will flow downward through the receiving plate 432 to the lower receiving plate 432, and in this process, it will be in full contact with the waste gas floating to the center of the tower body 1, realizing efficient absorption of the acid gas; and the excess lye will fall over the outer edge of the uppermost outer ring plate 434, also forming a ring-shaped liquid curtain, further expanding the contact range with the waste gas and improving the absorption effect.

[0056] As the inner ring plate 431 rotates synchronously with the center column 2, it will drive the lifting module 435 and the dredging module 436 to operate cooperatively (the operating principle is the same as that of the lifting module 425 and the dredging module 426 in the distribution assembly 42). Through periodic mechanical action, the flow channels 433 on the receiving plate 432 are dredged and cleaned, effectively preventing the crystallization generated by the reaction of lye and acid gas from blocking the flow channels 433, and ensuring the stability and continuity of lye flow.

[0057] Finally, the lye that has been in full contact with the waste gas and falls to the bottom of the tower body 1 is discharged from the tower body 1 through the liquid discharge pipe 54 and enters the subsequent processing link, forming a complete gas-liquid treatment cycle, ensuring the closed-loop nature and environmental protection of the equipment operation.

[0058] It is worth mentioning that the above-mentioned acrylic ester production waste gas filtering and purifying equipment also has the following advantages:

[0059] Advantage one, the center column 2 is rotated by the driving mechanism 3, and the shunt assembly 42 and the receiving assembly 43 are synchronously rotated, forming a rotating spraying posture. At the same time, the tower body 1 is divided into alternating channels by the shunt assembly 42 and the receiving assembly 43 arranged alternately. When the waste gas rises, it needs to pass through the edge area of the receiving assembly 43 and the center area of the shunt assembly 42 in turn, significantly prolonging the residence time. The lye falls through the through holes 423 or the flow channels 433 on the shunt plates 422 and the receiving plates 432, and the excess lye will overflow to form a ring-shaped liquid curtain. The rotating spraying combined with the multi-layer liquid curtain greatly expands the gas-liquid contact area, allowing the acidic gas to fully react with the lye, and greatly improving the absorption efficiency.

[0060] Advantage two, in view of the problem that the existing technology is easy to be blocked by salt crystals, the equipment is provided with lifting modules and dredging modules in the shunt assembly 42 and the receiving assembly 43. When the center column 2 rotates, the slide columns 4253 of the lifting module one 425 and the lifting module two 435 slide along the guide grooves 4252, periodically changing the distance between the upper and lower shunt plates 422 and the receiving plates 432. When the distance is reduced, the connecting columns 4261 of the dredging module one 426 and the dredging module two 436 are respectively inserted into the corresponding through holes 423 or flow channels 433. The rotary seat 4263 rotates under the cooperation of the inclined groove 4266 and the cylindrical block 4267, and the edge can scrape off the crystal deposits. This process does not need to stop, realizes the automatic cleaning of the through holes 423 and the flow channels 433, avoids the reduction or interruption of the spraying amount, and ensures the long-term continuous operation of the equipment.

[0061] Advantage three, the upper end of the inner ring plate one 421 in the shunt assembly 42 is lower than that of the outer ring plate one 424. After the lye is input through the liquid inlet pipe 53, part of it falls uniformly through the through holes 423, and the other part is stored on the shunt plate 422 to a certain height and then overflows from the edge of the inner ring plate one 421 or the outer ring plate one 424 to form a ring-shaped liquid curtain. Combined with the motion trajectory of the rotating spraying, the lye can cover the entire area from the center to the edge inside the tower body 1, completely solving the problem of differences in coverage range of traditional fixed nozzles, and ensuring that the waste gas and the lye are in contact without dead angles.

[0062] Advantage four, the device adopts the structure of alternating arrangement of the shunt assembly 42 and the receiving assembly 43. When the waste gas rises from the lower end of the tower body 1, it needs to alternately pass through the edge channel of the receiving assembly 43 and the center channel of the shunt assembly 42, forming a zigzag rising path of "edge-center-edge". The alkali solution, on the other hand, falls through the "through hole 423 and the edge overflow liquid curtain" and the "center overflow liquid curtain and the flow channel 433", and forms a reverse cross contact with the waste gas. This path design allows the waste gas to contact the alkali solution in different forms multiple times during the rising process, and the acid gas is absorbed layer by layer, making the treatment more thorough.

[0063] Advantage five, the shunt assembly 42 and the receiving assembly 43 of the device are both provided with a cavity structure, which can temporarily store the alkali solution, making the falling speed of the alkali solution more stable. At the same time, the automatic cleaning function of the unblocking module one 426 and the unblocking module two 436 avoids the flow fluctuation caused by the blockage of the through hole 423 and the flow channel 433, and the inlet pipe 53 and the outlet pipe 54 form a stable liquid flow circulation. In addition, the driving mechanism 3 is protected by the protective shell 32, and the power output is stable during operation, ensuring that the rotating speed of the center column 2 and the spraying mechanism 4 is uniform, further ensuring the stability of the alkali solution spraying and waste gas treatment, and avoiding the influence of the flow fluctuation on the treatment effect.

[0064] The above embodiments are only used to illustrate the technical solutions of the present application, but not to limit it; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements will not make the essence of the corresponding technical solutions deviate from the protection scope of the technical solutions of the embodiments of the present application.

Claims

1. An acrylate production waste gas filtration and purification device, characterized in that, include: The tower body (1) is provided with a central column (2) that coincides with its central axis. The bottom of the central column (2) is connected to a driving mechanism (3) that drives it to rotate. Spraying mechanisms (4) are evenly connected on the central column (2). Gas-liquid conveying mechanisms (5) are connected on the tower body (1). The spraying mechanism (4) includes an inner connecting frame (41), which is fixedly mounted on the central column (2). A diversion component (42) for receiving alkaline solution and allowing excess alkaline solution to converge and fall to the center is connected to the inner connecting frame (41). A receiving component (43) for receiving alkaline solution overflowing from the center above is connected to the central column (2) at a position below the inner connecting frame (41). The receiving component (43) is connected to the tower body (1) through an outer connecting frame (44). The diversion assembly (42) includes an inner ring plate (421), which is fixedly connected to the outer side of the inner connecting frame (41). Diversion plates (422) are symmetrically sleeved on the outer side of the inner ring plate (421). The diversion plates (422) are annular and have multiple through holes (423) evenly arranged in the circumferential direction from the inside to the outside. The upper and lower diversion plates (422) are connected together by a lifting module (425) that makes the distance between them change periodically and a cleaning module (426) for cleaning the through holes (423).

2. The acrylate production waste gas filtration and purification equipment according to claim 1, characterized in that: The upper splitter plate (422) is slidably connected to the inner ring plate (421) in the upper and lower directions. The lower splitter plate (422) is fixedly connected to the inner ring plate (421). The outer edge of the lower splitter plate (422) is rotatably connected to the outer ring plate (424).

3. The acrylate production waste gas filtration and purification equipment according to claim 2, characterized in that: The lower ends of the inner ring plate (421) and the outer ring plate (424) are flush, and the upper end of the inner ring plate (421) is lower than the upper end of the outer ring plate (424).

4. The acrylate production waste gas filtration and purification equipment according to claim 2, characterized in that: The lifting module (425) includes a ring frame (4251), which is fixedly connected to the upper end of the upper diversion plate (422). The outer circumferential surface of the ring frame (4251) is provided with a guide groove (4252). The inner circumferential surface of the outer ring plate (424) is symmetrically fixedly connected with sliding columns (4253). The guide groove (4252) includes two horizontal sections and two V-shaped sections, which are staggered and interconnected.

5. The acrylate production waste gas filtration and purification equipment according to claim 4, characterized in that: The through holes (423) on the upper diversion plate (422) and the lower diversion plate (422) correspond one to one. Each ring of through holes (423) on the diversion plate (422) is connected with a dredging module (426) at intervals. The dredging modules (426) on the upper diversion plate (422) and the lower diversion plate (422) face opposite directions and are staggered.

6. The acrylate production waste gas filtration and purification equipment according to claim 5, characterized in that: The unblocking module 1 (426) includes a connecting column (4261), which is coaxially fixedly connected in the through hole (423). A rotating seat (4263) is slidably connected to the connecting column (4261) through a return spring (4262). A baffle (4264) is fixedly connected to the upper end of the rotating seat (4263). The edges of the rotating seat (4263) and the baffle (4264) are uniformly provided with notches (4265) in the circumferential direction.

7. The acrylate production waste gas filtration and purification equipment according to claim 6, characterized in that: The outer circumferential surface of the connecting column (4261) is uniformly provided with inclined grooves (4266) along the circumferential direction, and the inner circumferential surface of the rotating seat (4263) is uniformly fixedly connected with columnar blocks (4267) connected to the inclined grooves (4266) along the circumferential direction.

8. The acrylate production waste gas filtration and purification equipment according to claim 6, characterized in that: The receiving component (43) includes an inner ring plate two (431) fixedly sleeved on the central column (2), and a receiving plate (432) symmetrically sleeved on the inner ring plate two (431). The receiving plate (432) adopts a circular design and has multiple rings of flow channels (433) evenly distributed around the circumference from the inside to the outside. The upper receiving plate (432) is slidably connected to the inner ring plate two (431) and the lower receiving plate (432) is fixedly connected to the inner ring plate two (431). The outer edge of the lower receiving plate (432) is rotatably connected to the outer ring plate two (434). The outer ring plate two (434) is fixedly connected to the tower body (1) through the outer connecting frame (44). The outer ring plate two (434) and the receiving plate (432) are connected together to the lifting module two (435) and the unblocking module two (436) with the same structure as the lifting module one (425) and the unblocking module one (426).

9. The acrylate production waste gas filtration and purification equipment according to claim 1, characterized in that: The drive mechanism (3) includes a drive motor (31), which is fixedly connected to the lower end of the tower body (1) through a protective shell (32). The drive shaft of the drive motor (31) passes through the protective shell (32) and is fixedly connected to the central column (2).

10. The acrylate production waste gas filtration and purification equipment according to claim 1, characterized in that: The gas-liquid conveying mechanism (5) includes an air inlet pipe (51), which is fixedly connected to the lower end of the tower body (1). An exhaust pipe (52) is fixedly connected to the top of the tower body (1). An inlet pipe (53) is fixedly connected to the upper end of the tower body (1), and a drain pipe (54) is fixedly connected to the lower end of the tower body (1).

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