A cracking device refined alkali solution regeneration tail gas washing tank

Abstract

The utility model relates to the field of chemical industry, and in particular to a water washing tank for tail gas regeneration from refined alkali solution of a cracking device. The utility model mainly solves the problem that the tail gas generated by the existing cracking device contains disulfide, which causes pipeline corrosion and blockage. The water washing tank for tail gas regeneration from refined alkali solution of a cracking device comprises a cylinder (5), characterized in that: desalted water and filter material (11) are arranged inside the cylinder (5), a tail gas inlet (13) and a desalted water replenishing port (14) are opened on the side wall of the cylinder (5), a tail gas outlet (9) is opened on the top of the cylinder (5), and a disulfide outlet (16) is opened on the bottom; a heating coil is wound on the outer wall of the lower part of the cylinder (5). The water washing tank for tail gas regeneration from refined alkali solution of a cracking device can wash the tail gas regenerated from alkali solution with water before discharging, thereby ensuring that the back-path flow of the tail gas regenerated from alkali solution is unblocked, avoiding the risk of flashback, and achieving safe production.

Description

Technical Field

[0001] The utility model relates to the field of chemical industry, in particular to a tail gas washing tank for regenerating tail gas from refined alkali solution of a cracking device. Background Art

[0002] At present, the tail gas generated during the regeneration process of refined alkali solution in the cracking unit is prone to carry dissolved slag molecules and disulfide molecules. There is a risk of tempering and ignition of disulfide in the tower during operation, and liquid disulfide will adhere to the pipeline, causing serious corrosion to the pipeline. The long-term discharge of tail gas is prone to cause pipeline blockage, affecting the smooth production of the unit. Summary of the invention

[0003] In order to overcome the shortcomings of existing cracking devices that the tail gas produced contains disulfide and causes pipeline corrosion and blockage, the utility model provides a cracking device refined alkali solution regeneration tail gas water washing tank, which can wash the alkali solution regeneration tail gas with water before discharging it, ensuring smooth flow of the alkali solution regeneration tail gas back-flow, avoiding the risk of flashback, and achieving safe production.

[0004] The technical scheme of the utility model is: a cracking device refined alkali solution regeneration tail gas washing tank, comprising a cylinder, wherein desalted water and filter material are arranged inside the cylinder, a tail gas inlet and a desalted water replenishing port are opened on the side wall of the cylinder, a tail gas outlet is opened on the top of the cylinder, and a disulfide outlet is opened on the bottom; a heating coil is wound on the outer wall of the lower part of the cylinder.

[0005] Furthermore, a bracket is provided above the interior of the cylinder, and the filter material is placed on the bracket.

[0006] Furthermore, a pressure gauge port and a vent port are provided on the top of the cylinder.

[0007] Furthermore, a skirt is connected to the bottom of the cylinder, and an exhaust hole is opened on the side wall of the skirt.

[0008] Furthermore, a liquid level gauge port is opened on the side wall of the cylinder, and a liquid level gauge is connected to the liquid level gauge port.

[0009] Furthermore, the two ends of the heating coil are respectively a hot water inlet and a hot water outlet, and the hot water inlet is located above the hot water outlet.

[0010] Furthermore, a ladder is provided on the outer surface of the cylinder, and a manhole is opened on the side wall of the cylinder.

[0011] The utility model has the following beneficial effects: due to the adoption of the above scheme, the water washing tank is connected to the tail gas pipeline, and the alkali liquid regeneration tail gas can be washed with water before discharge, and the disulfide in the tail gas can be removed, thereby reducing the corrosion of the subsequent pipeline and ensuring the smooth flow of the rear path of the alkali liquid regeneration tail gas; and it can play the role of water seal to prevent backfire, thereby achieving safe production. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the utility model.

[0013] In the figure, 1-base ring, 2-skirt, 3-hot water outlet, 4-hot water inlet, 5-cylinder, 6-manhole, 7-level gauge port, 8-pressure gauge port, 9-exhaust gas outlet, 10-vent, 11-filter material, 12-ladder, 13-exhaust gas inlet, 14-desalt water replenishment port, 15-vent, 16-disulfide outlet. DETAILED DESCRIPTION

[0014] The present invention is described in detail below in conjunction with the accompanying drawings and embodiments, and the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0015] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by "up", "down", "left", "right", "inside", "outside", "top" and "bottom" are all based on the directions or positional relationships shown in the accompanying drawings. The purpose is only to facilitate the description of the present invention and simplify the description. It does not indicate or imply that the referred parts must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0016] Depend on Figure 1 As shown, a tail gas washing tank for regenerating tail gas from refined alkali solution of a cracking device comprises a cylinder 5, wherein desalted water is arranged inside the cylinder 5, a tail gas inlet 13 and a desalted water replenishing port 14 are provided on the side wall of the cylinder 5, a tail gas outlet 9 is provided on the top of the cylinder 5, and a disulfide outlet 16 is provided on the bottom, and desalted water can be replenished into the cylinder through the desalted water replenishing port 14. A bracket is provided above the inside of the cylinder 5, and a filter material 11 is provided on the bracket. The tail gas enters from the tail gas inlet 13 and is discharged from the tail gas outlet 9 at the top. The filter material 11 can filter the tail gas before discharge. A heating coil is wound on the outer wall of the lower part of the cylinder 5, and the two ends of the heating coil are respectively a hot water inlet 4 and a hot water outlet 3, and the hot water inlet 4 is located above the hot water outlet 3. By circulating hot water in the heating coil, the cylinder 5 and the internal medium are heated to enhance the filtering function of the desalted water.

[0017] The top of the cylinder 5 is provided with a pressure gauge port 8 and a vent port 10. The pressure gauge port 8 is provided with a pressure gauge for monitoring the pressure inside the cylinder, and the vent port 10 can vent the gas inside the cylinder. At the same time, a safety valve is also provided on the top of the cylinder 5. When the pressure inside the cylinder is too high, the pressure can be released through the safety valve. The bottom of the cylinder 5 is connected to the skirt 2, and the bottom of the skirt 2 is connected to the base ring 1, which is fixed to the ground through the base ring 1. An exhaust hole 15 is opened on the side wall of the skirt 2, and the disulfide outlet 16 extends out of the skirt 2 through a pipeline. Two liquid level gauge ports 7 are opened on the side wall of the cylinder 5, and the two liquid level gauge ports 7 are respectively connected to liquid level gauges for marking the height of the liquid in the cylinder. A ladder 12 is provided on the outer surface of the cylinder 5, and a manhole 6 is opened on the side wall of the cylinder 5 to facilitate operators to enter the cylinder for maintenance.

[0018] The tail gas generated during the regeneration process of the refined alkali solution of the cracking device enters the cylinder 5 through the tail gas inlet 13, and the salts in the tail gas are removed by the desalted water in the cylinder. After that, the tail gas is filtered upward through the filter material 11 and discharged from the tail gas outlet 9. The disulfide in the desalted water sinks to the bottom of the cylinder and can be discharged regularly from the disulfide outlet 16. The water washing tank can wash the alkali solution regeneration tail gas with water before discharging, remove the disulfide in the tail gas, thereby reducing the corrosion of the subsequent pipelines and ensuring the smooth flow of the alkali solution regeneration tail gas; and it can also play the role of water seal to prevent backfire, thereby achieving safe production.

[0019] The embodiments of the present invention have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or technical improvements in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A cracking device refined alkali solution regeneration tail gas washing tank, comprising a cylinder (5), characterized in that: Desalted water and filter material (11) are provided inside the cylinder (5); a tail gas inlet (13) and a desalted water replenishment port (14) are provided on the side wall of the cylinder (5); a tail gas outlet (9) is provided on the top of the cylinder (5); and a disulfide outlet (16) is provided on the bottom; a heating coil is wound around the lower outer wall of the cylinder (5).

2. The tail gas washing tank for regenerating tail gas from refined alkali solution of cracking device according to claim 1, characterized in that: A bracket is provided above the interior of the cylinder (5), and the filter material (11) is placed on the bracket.

3. The tail gas washing tank for regenerating tail gas from refined alkali solution of cracking device according to claim 2, characterized in that: The top of the cylinder (5) is provided with a pressure gauge port (8) and a vent port (10).

4. The tail gas washing tank for regenerating tail gas from refined alkali solution of cracking device according to claim 3, characterized in that: The bottom of the cylinder (5) is connected to a skirt seat (2), and a vent hole (15) is provided on the side wall of the skirt seat (2).

5. The tail gas washing tank for regenerating tail gas from refined alkali solution of cracking device according to claim 4, characterized in that: A liquid level gauge port (7) is provided on the side wall of the cylinder (5), and a liquid level gauge is connected to the liquid level gauge port (7).

6. The tail gas washing tank for regenerating tail gas from refined alkali solution of cracking device according to claim 5, characterized in that: The two ends of the heating coil are respectively a hot water inlet (4) and a hot water outlet (3), and the hot water inlet (4) is located above the hot water outlet (3).

7. The tail gas washing tank for regenerating tail gas from refined alkali solution of cracking device according to claim 6, characterized in that: A ladder (12) is provided on the outer surface of the cylinder (5), and a manhole (6) is opened on the side wall of the cylinder (5).

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