Tail gas treatment device for trioxymethylene production

Abstract

The utility model discloses a trioxymethylene production tail gas treatment device, which comprises a reaction tank and a shell, the top of the reaction tank is fixedly connected with a connecting pipe, a gas extraction assembly for extracting gas in the connecting pipe into the shell is arranged on one side of the shell close to the bottom, the bottom of the shell is fixedly connected with a liquid inlet pipe, and the liquid inlet pipe is fixedly connected with a liquid outlet pipe. The device comprises a shell, a calcium hydroxide solution which reacts with tail gas is arranged in the shell, a liquid discharging pipe is fixedly connected to the position, close to the bottom, of one side of the shell, the liquid level of the calcium hydroxide solution is located below the liquid discharging pipe, an exhaust pipe is fixedly connected to the top of the shell, and a spraying assembly for spraying liquid is arranged at the top of the shell. According to the utility model, the calcium hydroxide solution can physically adsorb the tail gas, so that the purpose of purifying air is achieved, the tail gas is prevented from polluting the air, the tail gas can be fully contacted and reacted with the calcium hydroxide solution, and the tail gas treatment effect is improved.

Description

Technical Field

[0001] This utility model relates to the field of trioxymethylene production tail gas treatment technology, and in particular to a trioxymethylene production tail gas treatment device. Background Technology

[0002] Trioxymethylene, also known as trioxane, is an organic compound mainly used as an intermediate in engineering plastics polyoxymethylene and other chemicals. It can also be used as a disinfectant and a colorless, flameless fuel.

[0003] Trioxymethylene is produced by continuously distilling an aqueous solution of formaldehyde containing sulfuric acid, extracting the residue with benzene, and then distilling it again. During its processing, volatile gases are easily generated. If these volatile gases are not treated and leak into the air, they will cause air pollution. Utility Model Content

[0004] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a trioxymethylene production tail gas treatment device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A trioxymethylene production tail gas treatment device includes a reaction tank and a shell. A connecting pipe is fixedly connected to the top of the reaction tank. A gas extraction component is provided on one side of the shell near the bottom to draw gas from the connecting pipe into the shell. A liquid inlet pipe is fixedly connected to the bottom of the shell. A calcium hydroxide solution that reacts with the tail gas is provided inside the shell. A drain pipe is fixedly connected to one side of the shell near the bottom, and the liquid level of the calcium hydroxide solution is below the drain pipe. An exhaust pipe is fixedly connected to the top of the shell. A spraying component for spraying liquid is provided on the top of the shell.

[0007] As a further embodiment of this utility model, the air extraction assembly includes a fixing block, which is fixedly connected to one side of the outer wall of the housing. An air extraction pump is fixedly connected to one side of the fixing block. The connecting pipe is connected to the air inlet of the air extraction pump. An air inlet pipe is fixedly connected to one end of the air outlet of the air extraction pump. Multiple connecting blocks are fixedly connected to the inner circumference of the housing at a position within the calcium hydroxide solution. A second pipe frame is fixedly connected between the multiple connecting blocks. The air inlet pipe passes through the housing and is connected to the second pipe frame. Multiple gas nozzles are fixedly connected to the bottom of the second pipe frame.

[0008] As a further embodiment of this utility model, the spray assembly includes a first tube frame, the top of the housing is provided with a mounting hole, the first tube frame is fixedly connected in the mounting hole, and a plurality of atomizing nozzles are fixedly connected to the bottom of the first tube frame.

[0009] As a further embodiment of this invention, a connecting pipe for adding liquid is fixedly connected to the top of the first pipe rack.

[0010] As a further embodiment of this utility model, the top inner wall of the shell is fixedly connected with a plurality of fixing columns, and the fixing columns are fixed to the first tube frame.

[0011] As a further embodiment of this invention, the reaction vessel and the bottom outer wall of the shell are fixedly connected with multiple support legs.

[0012] The beneficial effects of this utility model are as follows:

[0013] 1. In this utility model, by setting up a calcium hydroxide solution, the exhaust gas in the reaction tank is drawn into the shell and enters the calcium hydroxide solution, so that the calcium hydroxide solution physically adsorbs the exhaust gas, thereby achieving the purpose of purifying the air and avoiding the exhaust gas from polluting the air.

[0014] 2. In this utility model, the spray assembly sprays calcium hydroxide solution into the housing, thereby allowing the exhaust gas to fully contact and react with the calcium hydroxide solution, thus improving the treatment effect of the exhaust gas. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of a trioxymethylene production tail gas treatment device proposed in this utility model.

[0016] Figure 2 This is a schematic cross-sectional view of the shell structure of a trioxymethylene production tail gas treatment device proposed in this utility model;

[0017] Figure 3 This is a partially enlarged structural diagram of a trioxymethylene production tail gas treatment device proposed in this utility model.

[0018] Figure 4 This utility model proposes a tail gas treatment device for trioxymethylene production. Figure 2 A frontal view of the structure.

[0019] In the diagram: 1. Reaction vessel; 2. Shell; 3. Connecting pipe; 4. Exhaust pipe; 5. Connecting pipe; 6. Drain pipe; 7. Inlet pipe; 8. Fixing block; 9. Vacuum pump; 10. First pipe rack; 11. Inlet pipe; 12. Atomizing nozzle; 13. Fixing column; 14. Second pipe rack; 15. Connecting block; 16. Gas nozzle; 17. Calcium hydroxide solution. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. The described embodiments are only some embodiments of the present utility model, not all embodiments. Other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are all within the protection scope of the present utility model.

[0021] Reference Figures 1-4 A trioxymethylene production tail gas treatment device includes a reaction tank 1 and a shell 2. A connecting pipe 3 is bolted to the top of the reaction tank 1. A suction component is provided on one side of the shell 2 near the bottom to draw gas from the connecting pipe 3 into the shell 2. A liquid inlet pipe 7 is bolted to the bottom of the shell 2. A calcium hydroxide solution 17 that reacts with the tail gas is provided inside the shell 2. A drain pipe 6 is bolted to one side of the shell 2 near the bottom, with the liquid level of the calcium hydroxide solution 17 below the drain pipe 6. An exhaust pipe 4 is welded to the top of the shell 2. A spray component for spraying liquid is provided on the top of the shell 2. The calcium hydroxide solution 17 is added into the shell 2 through the liquid inlet pipe 7, so that the liquid level of the calcium hydroxide solution 17 is lower than that of the drain pipe 6. Then, the tail gas is drawn into the calcium hydroxide solution 17 inside the shell 2 through the suction component, so that the calcium hydroxide solution 17 physically adsorbs the tail gas, thereby purifying the air and preventing the tail gas from polluting the air.

[0022] In this invention, the air extraction assembly includes a fixing block 8, which is welded to one side of the outer wall of the housing 2. A suction pump 9 is bolted to one side of the fixing block 8. A connecting pipe 3 is connected to the air inlet of the suction pump 9. An air inlet pipe 11 is bolted to one end of the air outlet of the suction pump 9. Multiple connecting blocks 15 are welded to the inner circumference of the housing 2 within the calcium hydroxide solution 17. A second pipe bracket 14 is bolted between the multiple connecting blocks 15. The air inlet pipe 11 passes through the housing. 2 is connected to the second tube rack 14. The bottom of the second tube rack 14 is fixed with multiple gas nozzles 16 by bolts. When the vacuum pump 9 is started, the vacuum pump 9 draws the tail gas of trioxymethylene in the reaction tank 1 into the inlet pipe 11 through the connecting pipe 3. The tail gas enters the second tube rack 14 through the inlet pipe 11. The tail gas in the second tube rack 14 will be sprayed out through the gas nozzles 16. Since the second tube rack 14 is located in the calcium hydroxide solution 17, the tail gas will enter the calcium hydroxide solution 17.

[0023] In particular, the spray assembly includes a first tube frame 10, with a mounting hole on the top of the housing 2. The first tube frame 10 is fixed in the mounting hole by bolts. Multiple atomizing nozzles 12 are fixed to the bottom of the first tube frame 10 by bolts. A connecting pipe 5 for adding liquid is fixed to the top of the first tube frame 10 by bolts. Calcium hydroxide solution 17 is added to the first tube frame 10 through the connecting pipe 5. The calcium hydroxide solution 17 in the first tube frame 10 is atomized and sprayed out through the atomizing nozzles 12, allowing the exhaust gas to fully contact and react with the calcium hydroxide solution 17, thus improving the treatment effect of the exhaust gas. Multiple fixing columns 13 are fixed to the top inner wall of the housing 2 by bolts, and the fixing columns 13 are fixed to the first tube frame 10. The fixing columns 13 can increase the stability of the installation of the first tube frame 10. Multiple support legs are fixed to the bottom outer wall of the reaction tank 1 and the housing 2 by bolts.

[0024] Working principle: When needed, calcium hydroxide solution 17 is added to the shell 2 through the inlet pipe 7, so that the liquid level of calcium hydroxide solution 17 is higher than the second pipe rack 14 and lower than the drain pipe 6. Then, the vacuum pump 9 is started. The vacuum pump 9 draws the tail gas of trioxymethylene in the reaction tank 1 into the inlet pipe 11 through the connecting pipe 3. The tail gas enters the second pipe rack 14 through the inlet pipe 11. The tail gas in the second pipe rack 14 will be sprayed into the calcium hydroxide solution 17 through the gas nozzle 16, so that the calcium hydroxide solution 17 physically adsorbs the tail gas, thereby achieving the purpose of purifying the air and avoiding the tail gas from polluting the air. At the same time, calcium hydroxide solution 17 is added to the first pipe rack 10 through the connecting pipe 5. The calcium hydroxide solution 17 in the first pipe rack 10 will be atomized and sprayed out through the atomizing nozzle 12, so that the tail gas can fully contact and react with the calcium hydroxide solution 17, improving the treatment effect of the tail gas. The treated tail gas will be discharged through the exhaust pipe 4.

[0025] Furthermore, the terms "installation," "setup," "connection," and "socketing" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral constructions; they can refer to mechanical or electrical connections; they can refer to direct connections or indirect connections via an intermediate medium, or internal connections between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

Claims

1. A trioxymethylene production tail gas treatment device, comprising a reaction tank (1) and a shell (2), characterized in that, The top of the reaction vessel (1) is fixedly connected to a connecting pipe (3). A gas extraction component is provided on one side of the shell (2) near the bottom to draw the gas in the connecting pipe (3) into the shell (2). A liquid inlet pipe (7) is fixedly connected to the bottom of the shell (2). A calcium hydroxide solution (17) that reacts with the tail gas is provided inside the shell (2). A drain pipe (6) is fixedly connected on one side of the shell (2) near the bottom. The liquid level of the calcium hydroxide solution (17) is below the drain pipe (6). An exhaust pipe (4) is fixedly connected to the top of the shell (2). A spraying component for spraying liquid is provided on the top of the shell (2).

2. The trioxymethylene production tail gas treatment device according to claim 1, characterized in that, The air extraction assembly includes a fixing block (8), which is fixedly connected to one side of the outer wall of the housing (2). A suction pump (9) is fixedly connected to one side of the fixing block (8). The connecting pipe (3) is connected to the air inlet of the suction pump (9). An air inlet pipe (11) is fixedly connected to one end of the air outlet of the suction pump (9). Multiple connecting blocks (15) are fixedly connected to the inner circumference of the housing (2) at the position inside the calcium hydroxide solution (17). A second pipe rack (14) is fixedly connected between the multiple connecting blocks (15). The air inlet pipe (11) passes through the housing (2) and is connected to the second pipe rack (14). Multiple gas nozzles (16) are fixedly connected to the bottom of the second pipe rack (14).

3. The trioxymethylene production tail gas treatment device according to claim 1, characterized in that, The spray assembly includes a first tube frame (10), the top of the housing (2) is provided with an installation hole, the first tube frame (10) is fixedly connected in the installation hole, and a plurality of atomizing nozzles (12) are fixedly connected to the bottom of the first tube frame (10).

4. The trioxymethylene production tail gas treatment device according to claim 3, characterized in that, The top of the first tube rack (10) is fixedly connected to a connecting tube (5) for adding liquid.

5. The trioxymethylene production tail gas treatment device according to claim 4, characterized in that, The top inner wall of the housing (2) is fixedly connected with a plurality of fixed columns (13), and the fixed columns (13) are fixed to the first tube frame (10).

6. The trioxymethylene production tail gas treatment device according to claim 1, characterized in that, The bottom outer wall of the reaction vessel (1) and the shell (2) are fixedly connected with multiple support legs.

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