Tail gas absorption tower for methyl chloride production

Abstract

The utility model belongs to the technical field of methyl chloride production, particularly relates to a tail gas absorption tower for methyl chloride production, and aims to solve the problems that the spraying behaviors of the existing equipment are concentrated on the first line, so that the tail gas cannot be comprehensively neutralized, and the purification and absorption treatment efficiency is reduced. A dust removal liquid tank is welded to the bottom end of the absorption tower box body, the same spraying structure is arranged in the absorption tower box body and the dust removal liquid tank, a backflow structure is arranged on the absorption tower box body, the spraying structure comprises a water pump installed at the bottom end in the dust removal liquid tank through bolts, a conveying pipe is inserted into the top of the water pump, and the other end of the conveying pipe extends and penetrates out of the dust removal liquid tank. The motor controls the driving gear to be meshed with the driven gear, the rotating pipe is controlled to rotate relative to the conveying pipe, the multiple nozzles are controlled to spray in the absorption tower box in a rotating mode, and the purification and absorption treatment efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of methyl chloride production, in particular to a tail gas absorption tower used in methyl chloride production. Background Art

[0002] At present, most chemical production enterprises use the method of vertical tower top spraying to treat industrial exhaust gas generated in the production process. Specifically, a circulating pump is used to extract absorption liquid from the liquid storage section at the bottom of the tower and spray it down to the top of the tower, so that the absorption liquid contacts the exhaust gas in the tower body and undergoes a neutralization reaction to achieve the purpose of absorbing the exhaust gas.

[0003] A patent with publication number CN05477994A is retrieved and provided with a tail gas absorption tower for methyl chloride production, comprising a hollow tower body, a tail gas inlet is arranged on the side of the tower body, a tail gas outlet is arranged on the top of the tower body, a nozzle is arranged inside the tower body below the tail gas outlet, the nozzle is connected to a circulation pump outside the tower body through a pipeline, the circulation pump is connected to a liquid storage section at the bottom of the tower body through a pipeline, at least two grids are arranged in parallel above the tail gas inlet inside the tower body, a layer of sponge is arranged on each grid, and filler particles are arranged on each layer of sponge.

[0004] The spraying behavior of existing equipment is concentrated in one line, which makes it impossible to fully neutralize the tail gas and reduces the efficiency of purification and absorption treatment. Therefore, we propose a tail gas absorption tower for methyl chloride production to solve the above problems. Utility Model Content

[0005] The utility model aims to solve the disadvantage of concentrated spraying and proposes a tail gas absorption tower used in the production of methyl chloride.

[0006] In order to achieve the above-mentioned object, the utility model adopts the following technical scheme: a tail gas absorption tower used in the production of methyl chloride, comprising an absorption tower box body, a dust removal liquid tank is welded to the bottom end of the absorption tower box body, the absorption tower box body and the dust removal liquid tank are provided with the same spraying structure inside, and a reflux structure is provided on the absorption tower box body;

[0007] The spraying structure includes a water pump boltedly mounted at the bottom end of the dust removal liquid tank, a transport pipe is plugged into the top of the water pump, the other end of the transport pipe extends out of the dust removal liquid tank and is plugged into the top of the absorption tower body, the other end of the transport pipe is connected with a sleeve via a rolling bearing, the bottom end of the sleeve is plugged with a rotating tube via bolts, the bottom end of the rotating tube is welded with a distribution pipe, and the bottom end of the distribution pipe is evenly plugged with a number of nozzles via screw holes.

[0008] Preferably, the outer part of the sleeve is sleeved with a driven gear, the driven gear is meshingly connected with a driving gear, the top of the driving gear extends through the absorption tower body through a plug-in drive shaft, and is plugged with a motor through a connecting key, and the bottom end of the motor is installed on the absorption tower body by bolts.

[0009] Preferably, the reflux structure comprises an exhaust port welded on the top of the absorption tower body, and a concentration detector is installed at the bottom end of the exhaust port.

[0010] Preferably, a reflux pipe is welded to one end of the exhaust port, an air pump is plugged into the bottom end of the reflux pipe, the air pump is installed on the absorption tower body by bolts, a solenoid valve 1 is arranged at the top of the exhaust port, and a solenoid valve 2 is arranged at the inner top end of the reflux pipe.

[0011] Preferably, the bottom end of the air pump is installed on the air inlet, and the air inlet is opened at the bottom end of one side of the absorption tower box.

[0012] Preferably, a filtering structure is provided inside the absorption tower casing.

[0013] Preferably, the filtering structure includes a fiber cloth filter plate installed inside the absorption tower case through a fixing ring bolt, a plain porcelain particle filter plate is installed inside the absorption tower case and at the bottom end of the fiber cloth filter plate through the fixing ring bolts, and an activated carbon particle filter plate is installed inside the absorption tower case and at the bottom end of the plain porcelain particle filter plate through the fixing ring bolts.

[0014] In the utility model, a tail gas absorption tower used in the production of methyl chloride is described:

[0015] 1. The utility model controls the engagement of the driving gear and the driven gear through the motor, controls the rotating tube to rotate relative to the transport tube, and controls a plurality of nozzles to rotate and spray inside the absorption tower box, thereby improving the purification and absorption processing efficiency;

[0016] 2. The utility model detects the concentration of harmful substances in the gas in real time through the concentration detector in the reflux structure. Once the concentration does not meet the standard, the air pump transports the gas to the air inlet through the reflux pipe, which is convenient for secondary purification and effectively ensures the purity of the purification. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of a tail gas absorption tower used in the production of methyl chloride proposed by the utility model;

[0018] Figure 2 This is a schematic structural diagram of the internal part of a tail gas absorption tower used in the production of methyl chloride proposed by the utility model;

[0019] Figure 3 This is a schematic structural diagram of part A of a tail gas absorption tower for methyl chloride production proposed by the utility model;

[0020] Figure 4 The utility model is a schematic structural diagram of the B part of a tail gas absorption tower used in the production of methyl chloride.

[0021] In the figure: 1. Absorption tower body; 2. Dust removal liquid tank; 3. Spraying structure; 301. Water pump; 302. Transport pipe; 303. Sleeve; 304. Rotating pipe; 305. Distribution pipe; 306. Nozzle; 307. Driven gear; 308. Driving gear; 309. Drive shaft; 3010. Motor; 4. Reflux structure; 401. Exhaust port; 402. Concentration detector; 403. Reflux pipe; 404. Air pump; 405. Air inlet; 5. Filtering structure; 501. Fiber cloth filter plate; 502. Plain porcelain particle filter plate; 503. Activated carbon particle filter plate. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0023] Reference Figure 1-4 , a tail gas absorption tower used in the production of methyl chloride, comprising an absorption tower box body 1, a dust removal liquid tank 2 is welded to the bottom end of the absorption tower box body 1, the absorption tower box body 1 and the dust removal liquid tank 2 are provided with the same spraying structure 3, and a reflux structure 4 is provided on the absorption tower box body 1;

[0024] The spraying structure 3 includes a water pump 301 bolted to the bottom end of the dust removal liquid tank 2, a transport pipe 302 is plugged into the top of the water pump 301, the other end of the transport pipe 302 extends through the dust removal liquid tank 2 and is plugged into the top of the absorption tower body 1, the other end of the transport pipe 302 is connected with a sleeve 303 through a rolling bearing, the bottom end of the sleeve 303 is plugged with a rotating tube 304 through bolts, the bottom end of the rotating tube 304 is welded with a distribution pipe 305, and the bottom end of the distribution pipe 305 is evenly plugged with a number of nozzles 306 through screw holes.

[0025] In this embodiment, the outer part of the sleeve 303 is sleeved with a driven gear 307, and the driven gear 307 is meshedly connected with a driving gear 308. The top of the driving gear 308 extends through the absorption tower box 1 through an inserted drive shaft 309, and is plugged with a motor 3010 through a connecting key. The bottom end of the motor 3010 is installed on the absorption tower box 1 by bolts.

[0026] By adopting the above scheme, a driven gear 307 is sleeved on the outside of the sleeve 303, and the driven gear 307 is meshed with the driving gear 308. The top of the driving gear 308 extends through the absorption tower body 1 through the plug-in drive shaft 309, and is plugged with a motor 3010 through a connecting key. The bottom end of the motor 3010 is installed on the absorption tower body 1 through bolts, so that the driving gear 308 and the driven gear 307 are controlled by the motor 3010 to mesh with each other, so as to drive a plurality of nozzles 306 to rotate and spray inside the absorption tower body 1, thereby improving the purification and absorption treatment efficiency.

[0027] In this embodiment, the reflux structure 4 includes an exhaust port 401 welded to the top of the absorption tower housing 1 , and a concentration detector 402 is installed at the bottom end of the exhaust port 401 .

[0028] By adopting the above solution, by installing the concentration detector 402 at the bottom end of the exhaust port 401, the gas concentration detection behavior can be implemented at a close distance, avoiding the problem of missed detection.

[0029] In this embodiment, a return pipe 403 is welded to one end of the exhaust port 401, an air pump 404 is plugged into the bottom end of the return pipe 403, the air pump 404 is installed on the absorption tower box 1 by bolts, a solenoid valve 1 is arranged at the top of the exhaust port 401, and a solenoid valve 2 is arranged at the inner top of the return pipe 403.

[0030] By adopting the above scheme, a return pipe 403 is welded at one end of the exhaust port 401, an air pump 404 is plugged into the bottom end of the return pipe 403, and the air pump 404 is installed on the absorption tower box 1 by bolts. A solenoid valve 1 is provided at the top of the exhaust port 401, and a solenoid valve 2 is provided at the top of the inner part of the return pipe 403, so that the air pump 404 can transport the waste to the air inlet 405 through the return pipe 403.

[0031] In this embodiment, the bottom end of the air pump 404 is installed on the air inlet 405, and the air inlet 405 is opened at the bottom end of one side of the absorption tower box 1.

[0032] By adopting the above solution, the air intake behavior is realized by installing an air inlet 405 at the bottom end of the air pump 404, and the air inlet 405 is opened at the bottom end of one side of the absorption tower box 1.

[0033] In this embodiment, a filtering structure 5 is disposed inside the absorption tower housing 1 .

[0034] By adopting the above solution, a filtering structure 5 is provided inside the absorption tower box 1, so that the liquid can be filtered and the secondary utilization can be facilitated.

[0035] In this embodiment, the filtering structure 5 includes a fiber cloth filter plate 501 installed inside the absorption tower body 1 through a fixing ring bolt, a plain porcelain particle filter plate 502 is installed inside the absorption tower body 1 and at the bottom end of the fiber cloth filter plate 501 through a fixing ring bolt, and an activated carbon particle filter plate 503 is installed inside the absorption tower body 1 and at the bottom end of the plain porcelain particle filter plate 502 through a fixing ring bolt.

[0036] By adopting the above scheme, a fiber cloth filter plate 501 is installed inside the absorption tower body 1 through a fixing ring bolt, a plain porcelain particle filter plate 502 is installed inside the absorption tower body 1 and at the bottom end of the fiber cloth filter plate 501 through a fixing ring bolt, and an activated carbon particle filter plate 503 is installed inside the absorption tower body 1 and at the bottom end of the plain porcelain particle filter plate 502 through a fixing ring bolt, thereby realizing layer-by-layer filtration and effectively improving the purpose of removing internal impurities.

[0037] In the utility model, when in use, waste is added through the air inlet 405, and the particles inside are filtered through the fiber cloth filter plate 501, the plain porcelain particle filter plate 502, and the activated carbon particle filter plate 503. Then the water pump 301 transports the liquid inside the dust removal liquid tank 2 to the plurality of nozzles 306 for spraying. The motor 3010 controls the active gear 308 to engage with the driven gear 307, and controls the rotating tube 304 to rotate relative to the transport tube 302, so as to control the plurality of nozzles 306 to rotate and spray inside the absorption tower box 1. The concentration detector 402 detects the concentration of harmful substances in the gas in real time. Once the concentration does not meet the standard, the air pump 404 transports the gas to the air inlet 405 through the reflux pipe 403, so as to facilitate secondary purification.

[0038] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is defined by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0039] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A tail gas absorption tower for use in the production of methyl chloride, comprising an absorption tower housing (1), characterized in that: A dust removal liquid tank (2) is welded to the bottom end of the absorption tower box (1); the absorption tower box (1) and the dust removal liquid tank (2) are provided with a same spraying structure (3) inside; and a reflux structure (4) is provided on the absorption tower box (1); The spraying structure (3) comprises a water pump (301) bolted to the bottom end of the dust removal liquid tank (2); a transport pipe (302) is plugged into the top of the water pump (301); the other end of the transport pipe (302) extends out of the dust removal liquid tank (2) and is plugged into the top of the absorption tower body (1); the other end of the transport pipe (302) is sleeved with a sleeve (303) via a rolling bearing; the bottom end of the sleeve (303) is plugged with a rotating tube (304) via bolts; the bottom end of the rotating tube (304) is welded with a distribution pipe (305); and the bottom end of the distribution pipe (305) is evenly plugged with a plurality of spray heads (306) via screw holes.

2. A tail gas absorption tower for the production of methyl chloride according to claim 1, characterized in that: The outer portion of the sleeve (303) is sleeved with a driven gear (307), and the driven gear (307) is meshedly connected with a driving gear (308). The top of the driving gear (308) extends through the absorption tower housing (1) via a plug-in drive shaft (309), and is plugged with a motor (3010) via a connecting key. The bottom end of the motor (3010) is mounted on the absorption tower housing (1) via bolts.

3. A tail gas absorption tower for methyl chloride production according to claim 1, characterized in that: The reflux structure (4) comprises an exhaust port (401) welded to the top of the absorption tower housing (1), and a concentration detector (402) is installed at the bottom end of the exhaust port (401).

4. A tail gas absorption tower for the production of methyl chloride according to claim 3, characterized in that: A return pipe (403) is welded to one end of the exhaust port (401), an air pump (404) is plugged into the bottom end of the return pipe (403), and the air pump (404) is mounted on the absorption tower housing (1) via bolts. A solenoid valve 1 is disposed at the top of the exhaust port (401), and a solenoid valve 2 is disposed at the top end of the return pipe (403).

5. A tail gas absorption tower for the production of methyl chloride according to claim 4, characterized in that: The bottom end of the air pump (404) is installed on the air inlet (405), and the air inlet (405) is opened at the bottom end of one side of the absorption tower box (1).

6. A tail gas absorption tower for methyl chloride production according to claim 1, characterized in that: A filtering structure (5) is arranged inside the absorption tower casing (1).

7. A tail gas absorption tower for the production of methyl chloride according to claim 6, characterized in that: The filtering structure (5) comprises a fiber cloth filter plate (501) installed inside the absorption tower housing (1) via a fixing ring bolt, a plain porcelain particle filter plate (502) installed inside the absorption tower housing (1) and at the bottom end of the fiber cloth filter plate (501) via the fixing ring bolt, and an activated carbon particle filter plate (503) installed inside the absorption tower housing (1) and at the bottom end of the plain porcelain particle filter plate (502) via the fixing ring bolt.

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