Pretreatment equipment for catalytic hydrolysis of carbonyl sulfide in coal gas

Abstract

The utility model relates to the technical field of chemical purification of coal gas, and discloses pretreatment equipment for catalytic hydrolysis of carbonyl sulfide of coal gas, which comprises a pretreatment tower, one side of the bottom of the pretreatment tower is communicated and connected with a gas inlet pipe, and a powder spraying nozzle for spraying lime powder is arranged at one end of the gas inlet pipe and at the joint of the gas inlet pipe and the pretreatment tower. One end of the powder spraying nozzle is in through connection with a lime bin, and one side of the top of the pretreatment tower is in through connection with an air pipe. According to the pretreatment equipment for catalytic hydrolysis of the carbonyl sulfide in the coal gas, through the arrangement of the pretreatment tower, the coal gas treated by the pretreatment tower enters the bag-type dust collector to be treated, so that substances such as dust can be removed, and finally, the carbonyl sulfide in the coal gas is subjected to hydrolysis reaction under the action of a catalyst under the action of the hydrolysis reaction tower; according to the method, factors causing catalyst poisoning in the coal gas are removed, catalyst selection and reaction conditions are optimized, efficient conversion of carbonyl sulfide in the coal gas is achieved, the coal gas supply quality is improved, and environmental pollution is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of coal gas chemical purification, in particular to pretreatment equipment for catalytic hydrolysis of coal gas carbonyl sulfide. Background Art

[0002] "Carbonyl sulfide hydrogenation" refers to the "hydrogenation reaction of carbonyl sulfide". In the chemical process, the hydrogenation reaction is the process of adding hydrogen (H2) to an organic compound to cause a reduction reaction. For carbonyl sulfide (COS), it can be converted into hydrogen sulfide through the hydrogenation reaction. Carbonyl sulfide is converted into hydrogen sulfide (H2S) through a catalytic reaction under certain conditions.

[0003] However, raw coal gas (untreated coal gas) contains a large amount of substances that can poison catalysts, such as chloride ions, dust, tar, etc. If they are not treated and directly catalytically hydrolyzed, the catalyst life is very short, and the requirements for the catalyst are strict, the selection range is small, and the cost-effectiveness is very low. The traditional carbonyl sulfide hydrogenation process has high requirements and needs to be transformed into a catalytic hydrolysis process. Therefore, a pretreatment equipment for the catalytic hydrolysis of coal gas carbonyl sulfide is needed for pretreatment. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] The technical problem solved by the utility model is to provide a pretreatment device for catalytic hydrolysis of carbonyl sulfide in coal gas which is highly practical, can be simply operated and has a relatively simple structure. It solves the problem mentioned in the above background technology that the raw coal gas (untreated coal gas) contains a large amount of substances that may poison the catalyst, such as chloride ions, dust, tar, etc. If they are not treated and directly catalytically hydrolyzed, the catalyst life is very short, the requirements for the catalyst are strict, the selection range is small, and the cost-effectiveness is very low.

[0006] (II) Technical solution

[0007] To achieve the above objectives, the utility model is implemented through the following technical solutions: a pretreatment device for catalytic hydrolysis of carbonyl sulfide in coal gas, comprising a pretreatment tower, one side of the bottom of the pretreatment tower is connected with an air inlet pipe, one end of the air inlet pipe and the connection with the pretreatment tower is provided with a powder spraying nozzle for spraying lime powder, one end of the powder spraying nozzle is connected with a lime bin, one side of the top of the pretreatment tower is connected with an air duct, one end of the air duct is connected with a bag filter, one side of the bag filter is connected with a connecting pipe, an exhaust hole is provided on the surface of the connecting pipe, the surface of the exhaust hole is connected with an air pipe, one end of the air pipe is connected with a powder feeding fan, the surface of the powder feeding fan is connected with the inside of the powder spraying nozzle, one end of the air pipe is connected with the powder feeding fan, the surface of the powder feeding fan is connected with the inside of the powder spraying nozzle.

[0008] Optionally, one end of the connecting pipe is connected to a hydrolysis reaction tower, and one side of the top of the hydrolysis reaction tower is connected to an air outlet pipe.

[0009] Optionally, a nitrogen pipe is connected through one side of the top of the bag filter, and a nitrogen bottle for cleaning is provided at one end of the nitrogen pipe.

[0010] (III) Beneficial effects

[0011] The utility model provides a pretreatment device for catalytic hydrolysis of carbonyl sulfide in coal gas, which has the following beneficial effects:

[0012] 1. The pretreatment equipment for catalytic hydrolysis of carbonyl sulfide in coal gas has a pretreatment tower. When the coal gas enters the interior of the pretreatment tower from the air inlet pipe, it is affected by the lime powder sprayed into the powder spraying nozzle in the air inlet pipe and the water source sprayed from the water spraying head in the pretreatment tower. After the lime is added, chloride ions, tar and other substances can be removed. The addition of atomized water can adjust the effect of the lime reaction and provide water components for catalytic hydrolysis. The coal gas treated in the pretreatment tower enters the bag filter for treatment to remove dust and other substances. Finally, under the action of the hydrolysis reaction tower, the carbonyl sulfide in the coal gas undergoes a hydrolysis reaction under the action of the catalyst, the factors that poison the catalyst in the coal gas are removed, the catalyst selection and reaction conditions are optimized, the efficient conversion of carbonyl sulfide in the coal gas is achieved, the coal gas supply quality is improved, and environmental pollution is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 This is a schematic diagram of the structure of the pretreatment tower of the utility model;

[0015] Figure 3 This is a schematic diagram of the structure of the hydrolysis reaction tower of the utility model;

[0016] Figure 4 This is a schematic diagram of the structure of the bag dust collector of the utility model.

[0017] In the figure: 1. pretreatment tower; 2. air inlet pipe; 3. powder spray nozzle; 4. lime silo; 5. air duct; 6. bag filter; 7. connecting pipe; 8. air exhaust hole; 9. air pipe; 10. powder feeding fan; 11. water tank; 12. water pipe; 13. water spray head; 14. hydrolysis reaction tower; 15. air outlet pipe; 16. nitrogen pipe; 17. nitrogen cylinder. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] See also Figures 1 to 4 The utility model provides a technical solution: a pretreatment device for catalytic hydrolysis of carbonyl sulfide in coal gas, comprising a pretreatment tower 1, one side of the bottom of the pretreatment tower 1 is connected with an air inlet pipe 2, one end of the air inlet pipe 2 and the connection with the pretreatment tower 1 are provided with a powder spraying nozzle 3 for spraying lime powder, one end of the powder spraying nozzle 3 is connected with a lime bin 4, and one side of the top of the pretreatment tower 1 is connected with an air duct 5.

[0020] See also Figure 4 One end of the air duct 5 is connected to the bag-type dust collector 6, one side of the bag-type dust collector 6 is connected to the connecting pipe 7, one side of the top of the bag-type dust collector 6 is connected to the nitrogen pipe 16, one end of the nitrogen pipe 16 is provided with a nitrogen bottle 17 for cleaning, the bag-type dust collector 6 and the nitrogen bottle 17 are arranged, the bag-type dust collector 6 uses the nitrogen bottle 17 as the back-blowing gas source to remove dust and other substances.

[0021] See also Figure 1 A suction hole 8 is provided on the surface of the connecting pipe 7, and an air pipe 9 is connected to the surface of the suction hole 8. One end of the air pipe 9 is connected to a powder feeding fan 10. The surface of the powder feeding fan 10 is connected to the inside of the powder spraying nozzle 3. A water tank 11 is provided adjacent to the bottom of the pretreatment tower 1. A water pipe 12 is connected to the surface of the water tank 11. One end of the water pipe 12 penetrates into the interior of the pretreatment tower 1 and is provided with a water spray head 13. The powder spraying nozzle 3 and the water spray head 13 are provided. A lime and water addition port is provided at the front end of the pretreatment device. After the lime is added, chloride ions, tar and other substances can be removed. The addition of atomized water can adjust the effect of the lime reaction, provide water components for catalytic hydrolysis, remove acidic substances in the coal gas, such as chloride ions, tar, etc., adjust the moisture in the coal gas, better deacidify, and provide water components for subsequent catalytic hydrolysis.

[0022] See also Figure 3 One end of the connecting pipe 7 is connected to the hydrolysis reaction tower 14, and one side of the top of the hydrolysis reaction tower 14 is connected to the outlet pipe 15. The hydrolysis reaction tower 14 is set to control the hydrolysis reaction of carbonyl sulfide by adjusting the temperature and pressure of the reactor. The chloride ions and acidic substances in the coal gas are processed, and the subsequent hydrolysis reaction can proceed smoothly, the catalyst life is extended, and the frequency of catalyst replacement is reduced.

[0023] In the utility model, the working steps of the device are as follows:

[0024] The first step: when the coal gas enters the interior of the pretreatment tower 1 from the air inlet pipe 2, it is affected by the lime powder sprayed into the powder spray nozzle 3 in the air inlet pipe 2 and the water source sprayed from the water spray head 13 in the pretreatment tower 1. After the lime is added, substances such as chloride ions and tar can be removed. The addition of atomized water can adjust the effect of the lime reaction and provide water components for catalytic hydrolysis. The coal gas treated by the pretreatment tower 1 enters the bag filter 6 for treatment, which can remove dust and other substances. Finally, under the action of the hydrolysis reaction tower 14, the carbonyl sulfide in the coal gas undergoes a hydrolysis reaction under the action of the catalyst to remove the factors in the coal gas that may poison the catalyst.

[0025] It should be noted that the equipment structure and drawings of the utility model mainly describe the principle of the utility model. In terms of the technology of the design principle, the settings of the power mechanism, power supply system and control system of the device are not fully described. On the premise that the technical personnel in this field understand the principle of the above utility model, the details of the power mechanism, power supply system and control system can be clearly known. The control method of the application document is automatic control through a controller, and the control circuit of the controller can be realized by simple programming by the technical personnel in this field;

[0026] The standard parts used therein can all be purchased from the market and can be customized according to the instructions and drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt conventional models in the prior art, and the structures and principles of the components known to technical personnel in this field can be known by these technical personnel through technical manuals or through conventional experimental methods.

[0027] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pretreatment device for catalytic hydrolysis of carbonyl sulfide in coal gas, comprising a pretreatment tower (1), characterized in that: An air inlet pipe (2) is connected through one side of the bottom of the pretreatment tower (1); a powder spraying nozzle (3) for spraying lime powder is provided at one end of the air inlet pipe (2) and at the connection with the pretreatment tower (1); one end of the powder spraying nozzle (3) is connected through a lime bin (4); an air duct (5) is connected through one side of the top of the pretreatment tower (1); one end of the air duct (5) is connected through a bag filter (6); one side of the bag filter (6) is connected through a connecting pipe (7); the connecting pipe ( The surface of the pretreatment tower (7) is provided with an air extraction hole (8), the surface of the air extraction hole (8) is connected with an air pipe (9), one end of the air pipe (9) is connected with a powder feeding fan (10), the surface of the powder feeding fan (10) is connected with the inside of the powder spraying nozzle (3), a water tank (11) is provided adjacent to the bottom of the pretreatment tower (1), the surface of the water tank (11) is connected with a water pipe (12), one end of the water pipe (12) passes through the interior of the pretreatment tower (1) and is provided with a water spray head (13).

2. The pretreatment equipment for catalytic hydrolysis of carbonyl sulfide in coal gas according to claim 1, characterized in that: One end of the connecting pipe (7) is connected to a hydrolysis reaction tower (14), and one side of the top of the hydrolysis reaction tower (14) is connected to an air outlet pipe (15).

3. The pretreatment equipment for catalytic hydrolysis of carbonyl sulfide in coal gas according to claim 1, characterized in that: A nitrogen pipe (16) is connected through one side of the top of the bag filter (6), and a nitrogen bottle (17) for cleaning is provided at one end of the nitrogen pipe (16).

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