Laboratory tail gas alkali absorption tower

Abstract

The utility model discloses a laboratory tail gas alkali absorption tower and belongs to the technical field of fine chemical engineering. The laboratory tail gas alkali absorption tower comprises a first absorption tower and a second absorption tower, the gas supply pump is arranged on one side of the first absorption tower; the air supply pipe is arranged between the lower end of the first absorption tower and the exhaust end of the air supply pump; the spraying assembly is arranged in the first absorption tower; the breather pipe is arranged between the upper end of the first absorption tower and the lower end of the second absorption tower; the supporting net plate is arranged in the second absorption tower, and a water absorption sponge is arranged on the supporting net plate; the limiting net plate is arranged on the upper side of the water absorption sponge; according to the utility model, waste caused by direct discharge of alkali liquor water mist is effectively prevented, and the tail gas is treated again through the second absorption tower, so that the contact efficiency of the tail gas and the alkali liquor is effectively improved, and the treatment efficiency of the alkali liquor is further effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of tail gas treatment in fine chemical industry, in particular to a tail gas alkali absorption tower for laboratories. Background Art

[0002] When conducting scientific research experiments, they are generally carried out in laboratories. When conducting certain chemical experiments or chemical research, it is inevitable to generate some acidic or alkaline tail gases. In order to avoid harm to staff and environmental pollution, the tail gases need to be treated. Among them, when treating acidic tail gases, an alkali absorption tower is required to treat the tail gases.

[0003] The current tail gas alkali absorption tower uses a spraying mechanism to spray alkali liquor, and then the tail gas flows upward after entering the absorption tower, so that the tail gas is fully contacted with the sprayed alkali liquor to complete the treatment of acidic tail gas. However, since the tail gas flows upward and is discharged, some of the water mist molecules of the sprayed alkali liquor water mist are relatively small, and it is possible to carry away some of the water mist, resulting in waste of alkali liquor. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a laboratory tail gas alkali absorption tower that can overcome the above problems or at least partially solve the above problems.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A laboratory tail gas alkali absorption tower, comprising: a first absorption tower and a second absorption tower; a gas supply pump arranged on one side of the first absorption tower; a gas supply pipe arranged between the lower end of the first absorption tower and the exhaust end of the gas supply pump; a spraying assembly arranged in the first absorption tower; a ventilation pipe arranged between the upper end of the first absorption tower and the lower end of the second absorption tower; a support mesh plate arranged in the second absorption tower, and a water absorption sponge is arranged on the support mesh plate; a limit mesh plate arranged on the upper side of the water absorption sponge; an exhaust fan arranged on one side of the second absorption tower; an air extraction pipe arranged between the air extraction end of the exhaust fan and the top of the second absorption tower; and a sealing cover threadedly connected to the top of the second absorption tower.

[0007] Preferably, the spraying assembly includes a hollow rotating shaft arranged in the first absorption tower, a spiral plate is fixedly connected to the hollow rotating shaft, a plurality of spray heads are fixedly connected to the spiral plate in a spiral shape, and the spray heads are communicated with the hollow rotating shaft. A circulating pump is arranged on one side of the first absorption tower. A liquid extraction pipe is fixedly connected between the liquid extraction end of the circulating pump and the bottom of the first absorption tower. The liquid discharge end of the circulating pump is fixedly connected with a liquid supply pipe, and the liquid supply pipe is communicated with the hollow rotating shaft.

[0008] In order to facilitate improving its spraying effect, further, a sealing ring is fixedly connected to the top of the first absorption tower, the hollow rotating shaft is sealingly and rotationally connected to the sealing ring, a plurality of circular holes are circumferentially formed in the hollow rotating shaft, the circular holes are communicated with the sealing ring, one end of the liquid supply pipe is communicated with the sealing ring, a driving motor is fixedly connected to the sealing ring, and an output end of the driving motor is fixedly connected to the hollow rotating shaft.

[0009] In order to facilitate dispersing the bubbles, further, a plurality of stirring rods are fixedly connected to the lower end of the hollow rotating shaft.

[0010] In order to facilitate increasing the contact area between the tail gas and the alkali solution, further, a first mesh plate and a second mesh plate are arranged in the second absorption tower, a connecting rod is fixedly connected between the first mesh plate and the second mesh plate, a vibration motor is fixedly connected to the bottom of the second absorption tower, an output end of the vibration motor is fixedly connected to the connecting rod, a mounting rod is fixedly connected to the limiting mesh plate, the mounting rod is slidably connected to the supporting mesh plate, and the mounting rod is connected to the connecting rod.

[0011] In order to facilitate the circulation of the alkali solution, further, a connecting pipe is arranged between the bottoms of the first absorption tower and the second absorption tower, and a one-way valve is arranged in the connecting pipe.

[0012] Compared with the prior art, the present utility model provides a laboratory tail gas alkali absorption tower, which has the following beneficial effects:

[0013] 1. For this laboratory tail gas alkali absorption tower, the tail gas is extracted by an air supply pump and conveyed into the first absorption tower through an air supply pipe. The input gas forms bubbles in the alkali solution in the first absorption tower. At this time, the alkali solution reacts with the acidic substances in the tail gas for neutralization reaction. Then the gas gradually moves upward along the spiral plate. The alkali solution is conveyed into the spray head through a circulation pump, a liquid extraction pipe, a liquid supply pipe, a sealing ring and a hollow rotating shaft and sprayed out. The sprayed water mist fully contacts the upward flowing gas, thereby effectively improving the treatment effect on the tail gas. And the tail gas takes away part of the water mist and flows into the second absorption tower along the ventilation pipe. At this time, the gas with water mist forms bubbles and floats upward from the alkali solution in the second absorption tower, and part of the water mist contacts and dissolves with the alkali solution in the second absorption tower, thereby effectively preventing the waste caused by the direct discharge of the alkali solution water mist. And the tail gas is treated again by the second absorption tower, thereby effectively improving the contact efficiency between the tail gas and the alkali solution, and further effectively improving the treatment efficiency of the alkali solution.

[0014] 2. The tail gas alkali absorption tower of this laboratory is driven by a vibration motor to move a connecting rod up and down. At this time, one end of the air pipe is always located between the first mesh plate and the second mesh plate. The ejected gas forms bubbles in the alkali solution, and through the shaking of the first mesh plate and the second mesh plate, the bubbles are broken up and made smaller, thus effectively improving the contact efficiency between the tail gas and the alkali solution, and further effectively improving the treatment effect on the tail gas and the removal effect on the water mist in the tail gas.

[0015] 3. The tail gas alkali absorption tower of this laboratory is equipped with an exhaust fan that extracts air outward through an air extraction pipe. After the gas in the second absorption tower passes through the water absorption sponge, the internal moisture is filtered by the water absorption sponge, thus effectively improving the treatment effect on the tail gas.

[0016] For the parts not involved in this device, they are the same as the prior art or can be implemented using the prior art. This utility model effectively prevents the waste caused by the direct discharge of alkali solution water mist, and through the secondary treatment of the tail gas by the second absorption tower, it effectively improves the contact efficiency between the tail gas and the alkali solution, and further effectively improves the treatment efficiency of the alkali solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural diagram of the tail gas alkali absorption tower of the laboratory proposed by this utility model;

[0018] Figure 2 It is a schematic sectional view of the tail gas alkali absorption tower of the laboratory proposed by this utility model;

[0019] Figure 3 It is the tail gas alkali absorption tower of the laboratory proposed by this utility model Figure 2 The enlarged schematic view of part A in it.

[0020] In the figure: 1. The first absorption tower; 101. The air supply pump; 102. The air supply pipe; 103. The air pipe; 104. The hollow rotating shaft; 105. The spiral plate; 106. The spray head; 107. The stirring rod; 108. The round hole; 109. The sealing ring; 110. The driving motor; 111. The circulation pump; 112. The liquid extraction pipe; 113. The liquid supply pipe; 114. The connecting pipe; 2. The second absorption tower; 201. The exhaust fan; 202. The air extraction pipe; 203. The sealing cover; 204. The vibration motor; 205. The connecting rod; 206. The first mesh plate; 207. The second mesh plate; 208. The support mesh plate; 209. The water absorption sponge; 210. The limiting mesh plate; 211. The mounting rod. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.

[0022] Example 1: Refer to Figures 1 - 3 , the tail gas alkali absorption tower in the laboratory, comprising: a first absorption tower 1 and a second absorption tower 2; a gas supply pump 101, arranged on one side of the first absorption tower 1; a gas supply pipe 102, arranged between the lower end of the first absorption tower 1 and the exhaust end of the gas supply pump 101; a spraying assembly, arranged inside the first absorption tower 1; a ventilation pipe 103, arranged between the upper end of the first absorption tower 1 and the lower end of the second absorption tower 2; a support mesh plate 208, arranged inside the second absorption tower 2, and a water absorption sponge 209 is arranged on the support mesh plate 208; a limiting mesh plate 210, arranged on the upper side of the water absorption sponge 209; an exhaust fan 201, arranged on one side of the second absorption tower 2; an air extraction pipe 202, arranged between the air extraction end of the exhaust fan 201 and the top of the second absorption tower 2; a sealing cover 203, threadedly connected to the top of the second absorption tower 2.

[0023] The spraying assembly includes a hollow rotating shaft 104 arranged inside the first absorption tower 1. A spiral plate 105 is fixedly connected to the hollow rotating shaft 104. A plurality of spray heads 106 are fixedly connected to the spiral plate 105 in a spiral shape, and the spray heads 106 are communicated with the hollow rotating shaft 104. A circulation pump 111 is arranged on one side of the first absorption tower 1. A liquid extraction pipe 112 is fixedly connected between the liquid extraction end of the circulation pump 111 and the bottom of the first absorption tower 1. The liquid discharge end of the circulation pump 111 is fixedly connected with a liquid supply pipe 113, and the liquid supply pipe 113 is communicated with the hollow rotating shaft 104.

[0024] A sealing ring 109 is fixedly connected to the top of the first absorption tower 1. The hollow rotating shaft 104 is in sealed rotational connection with the sealing ring 109. A plurality of circular holes 108 are arranged on the hollow rotating shaft 104 in a circumferential manner, and the circular holes 108 are communicated with the sealing ring 109. One end of the liquid supply pipe 113 is communicated with the sealing ring 109. A driving motor 110 is fixedly connected to the sealing ring 109, and the output end of the driving motor 110 is fixedly connected with the hollow rotating shaft 104.

[0025] A plurality of stirring rods 107 are fixedly connected to the lower end of the hollow rotating shaft 104.

[0026] When treating the laboratory tail gas, appropriate alkali solution is added to the first absorption tower 1 and the second absorption tower 2. Then, the tail gas is extracted by the air supply pump 101 and transported to the first absorption tower 1 through the air supply pipe 102. The input gas forms bubbles in the alkali solution in the first absorption tower 1. At this time, the alkali solution reacts with the acidic substances in the tail gas through neutralization. Then, the gas gradually moves upward along the spiral plate 105. The alkali solution is transported to the spray head 106 through the circulation pump 111, the liquid extraction pipe 112, the liquid supply pipe 113, the sealing ring 109, and the hollow rotating shaft 104 and sprayed out. The sprayed water mist fully contacts the upward flowing gas, thus effectively improving the treatment effect of the tail gas. And the tail gas takes away part of the water mist and flows into the second absorption tower 2 along the ventilation pipe 103. At this time, the gas with water mist forms bubbles and floats upward from the alkali solution in the second absorption tower 2, and part of the water mist contacts and dissolves with the alkali solution in the second absorption tower 2, thus effectively preventing the waste caused by the direct discharge of the alkali solution water mist. And the tail gas is treated again by the second absorption tower 2, thus effectively improving the contact efficiency between the tail gas and the alkali solution, and further effectively improving the treatment efficiency of the alkali solution.

[0027] The rotating hollow rotating shaft 104 drives the spiral plate 105 to rotate, so that the spray head 106 can spray the whole area, and thus effectively improves the treatment effect of the tail gas.

[0028] Example 2: Refer to Figures 1 - 3 , the laboratory tail gas alkali absorption tower is basically the same as that in Example 1. Further, a first mesh plate 206 and a second mesh plate 207 are arranged in the second absorption tower 2. A connecting rod 205 is fixedly connected between the first mesh plate 206 and the second mesh plate 207. And a vibration motor 204 is fixedly connected to the bottom of the second absorption tower 2. The output end of the vibration motor 204 is fixedly connected to the connecting rod 205. An installation rod 211 is fixedly connected to the limiting mesh plate 210. The installation rod 211 is slidably connected to the supporting mesh plate 208, and the installation rod 211 is connected to the connecting rod 205.

[0029] A connecting pipe 114 is arranged between the bottoms of the first absorption tower 1 and the second absorption tower 2, and a one-way valve is arranged in the connecting pipe 114.

[0030] The vibration motor 204 drives the connecting rod 205 to move up and down. At this time, one end of the ventilation pipe 103 is always located between the first mesh plate 206 and the second mesh plate 207. The sprayed gas forms bubbles in the alkali solution, and through the shaking of the first mesh plate 206 and the second mesh plate 207, the bubbles are broken up and become smaller, thus effectively improving the contact efficiency between the tail gas and the alkali solution, and further effectively improving the treatment effect of the tail gas and the removal effect of the water mist in the tail gas.

[0031] The exhaust fan 201 extracts air outward through the suction pipe 202. After the gas in the second absorption tower 2 passes through the water-absorbing sponge 209, the internal moisture is filtered by the water-absorbing sponge 209, thereby effectively improving the treatment effect on the tail gas.

[0032] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered within the protection scope of the present invention.

Claims

1. Laboratory tail gas alkali absorption tower, characterized in that, Including: A first absorption tower (1) and a second absorption tower (2); a gas supply pump (101) arranged on one side of the first absorption tower (1); a gas supply pipe (102) arranged between the lower end of the first absorption tower (1) and the exhaust end of the gas supply pump (101); a spray assembly arranged in the first absorption tower (1); a ventilation pipe (103) arranged between the upper end of the first absorption tower (1) and the lower end of the second absorption tower (2); a support mesh plate (208) arranged in the second absorption tower (2), and a water-absorbing sponge (209) is arranged on the support mesh plate (208); a limit mesh plate (210) arranged on the upper side of the water-absorbing sponge (209); an exhaust fan (201) arranged on one side of the second absorption tower (2); an air extraction pipe (202) arranged between the air extraction end of the exhaust fan (201) and the top of the second absorption tower (2); a sealing cover (203) threadedly connected to the top of the second absorption tower (2).

2. The laboratory tail gas alkali absorption tower according to claim 1, characterized in that, The spray assembly includes a hollow rotating shaft (104) arranged in the first absorption tower (1), a spiral plate (105) is fixedly connected to the hollow rotating shaft (104), a plurality of spray heads (106) are fixedly connected to the spiral plate (105) in a spiral shape, and the spray heads (106) are communicated with the hollow rotating shaft (104). A circulation pump (111) is arranged on one side of the first absorption tower (1), a liquid extraction pipe (112) is fixedly connected between the liquid extraction end of the circulation pump (111) and the bottom of the first absorption tower (1), the liquid discharge end of the circulation pump (111) is fixedly connected with a liquid supply pipe (113), and the liquid supply pipe (113) is communicated with the hollow rotating shaft (104).

3. The laboratory tail gas alkali absorption tower according to claim 2, characterized in that, A sealing ring (109) is fixedly connected to the top of the first absorption tower (1), the hollow rotating shaft (104) is in sealed rotational connection with the sealing ring (109), a plurality of round holes (108) are formed in a circular pattern on the hollow rotating shaft (104), the round holes (108) are communicated with the sealing ring (109), one end of the liquid supply pipe (113) is communicated with the sealing ring (109), a driving motor (110) is fixedly connected to the sealing ring (109), and the output end of the driving motor (110) is fixedly connected with the hollow rotating shaft (104).

4. The laboratory tail gas alkali absorption tower according to claim 3, characterized in that, A plurality of stirring rods (107) are fixedly connected to the lower end of the hollow rotating shaft (104).

5. The laboratory tail gas alkali absorption tower according to claim 3, wherein A first mesh plate (206) and a second mesh plate (207) are arranged in the second absorption tower (2), a connecting rod (205) is fixedly connected between the first mesh plate (206) and the second mesh plate (207), a vibration motor (204) is fixedly connected to the bottom of the second absorption tower (2), the output end of the vibration motor (204) is fixedly connected with the connecting rod (205), a mounting rod (211) is fixedly connected to the limit mesh plate (210), the mounting rod (211) is slidably connected with the support mesh plate (208), and the mounting rod (211) is connected with the connecting rod (205).

6. The laboratory tail gas alkali absorption tower according to claim 1, characterized in that, A connecting pipe (114) is provided between the bottoms of the first absorption tower (1) and the second absorption tower (2), and a one-way valve is provided in the connecting pipe (114).

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