Semi-water gas desulfurization system

Abstract

The utility model relates to the technical field of gas treatment, in particular to a semi-water gas desulfurization system which comprises a secondary cleaning tower, a primary electrostatic decoking tower, a pre-sulfur cooling tower, a pre-removal tower and a desulfurization tower, one end of the primary electrostatic decoking tower is communicated with the secondary cleaning tower, and the other end of the primary electrostatic decoking tower is communicated with the sulfur pre-cooling tower; the pre-sulfur cooling tower is communicated with the pre-removal tower; and the pre-removal tower is communicated with the desulfurization tower. In the existing semi-water gas desulfurization technology, a desulfurization system often adopts a relatively traditional design mode, and all treatment units are possibly integrated in one or more large-scale equipment, are physically separated but are complex in connection and lack a clear modular boundary. The design mode may cause the problems of inconvenience in maintenance or difficulty in upgrading and the like. Compared with the prior art, all the structures are independently communicated together, so that all the structures can independently complete respective work and do not interfere with one another, and equipment is more convenient to maintain and upgrade when the equipment needs to be maintained and upgraded.

Description

Technical Field

[0001] The utility model relates to the technical field of coal gas treatment, in particular to a semi-water coal gas desulfurization system. Background Art

[0002] The sulfur in semi-water gas exists primarily in the form of hydrogen sulfide, with a small amount of organic sulfides. The presence of sulfides not only causes corrosion of pipelines and equipment but also poisons catalysts, reducing their activity. Furthermore, when discharged, sulfides form pollutants such as sulfur dioxide, which has a serious impact on the environment. Therefore, desulfurization is essential. Semi-water gas desulfurization is a crucial step in the chemical production process, reducing equipment corrosion, preventing catalyst poisoning, and avoiding the emission of gases like sulfur dioxide that pollute the atmosphere.

[0003] Existing semi-water gas desulfurization technologies often utilize traditional desulfurization system designs, where each processing unit may be integrated into one or more large-scale equipment. While physically separate, these units are complex to connect and lack clear modular boundaries. This design approach can lead to issues such as inconvenient maintenance and difficulty upgrading. Utility Model Content

[0004] In view of the technical problems of the prior art, the utility model provides a semi-water gas desulfurization system.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0006] A semi-water gas desulfurization system comprises: a secondary cleaning tower, a primary electrostatic decoking tower, a pre-sulfurization cooling tower, a pre-desulfurization tower, and a desulfurization tower; one end of the primary electrostatic decoking tower is connected to the secondary cleaning tower, and the other end is connected to the pre-sulfurization cooling tower; the pre-sulfurization cooling tower is connected to the pre-desulfurization tower; and the pre-desulfurization tower is connected to the desulfurization tower.

[0007] Furthermore, it also includes: a water seal device; a water seal device is provided between the secondary cleaning tower and the primary electrostatic decoking tower; a water seal device is provided between the primary electrostatic decoking tower and the pre-sulfur cooling tower.

[0008] Furthermore, the pre-sulfur cooling tower further comprises: a water inlet pipe and a water outlet pipe; the water inlet pipe is arranged at the top of the pre-sulfur cooling tower; and the water outlet pipe is arranged at the bottom of the pre-sulfur cooling tower.

[0009] Furthermore, it also includes: a connecting pipe; the connecting pipe includes: a feed pipe, a pre-desulfurization pipe, and a desulfurization pipe; the feed pipe is connected to the pre-sulfurization cooling tower; one end of the pre-desulfurization pipe is connected to the pre-sulfurization cooling tower, and the other end is connected to the pre-desulfurization tower; one end of the desulfurization pipe is connected to the pre-sulfurization cooling tower, and the other end is connected to the desulfurization tower.

[0010] Furthermore, the connecting pipe also includes: a feed pipe, a reflux pipe, a discharge pipe, and a discharge pipe; the feed pipe is connected to the pre-desulfurization tower; one end of the reflux pipe is connected to the feed pipe, and the other end is connected to the conveying pipe; the discharge pipe is connected to the feed pipe; and the discharge pipe is connected to the desulfurization tower.

[0011] Furthermore, a pre-desulfurization valve is provided on the pre-desulfurization pipe; a desulfurization valve is provided on the desulfurization pipe; and a reflux valve is provided on the reflux pipe.

[0012] Furthermore, a discharge valve is provided on the discharge pipe; and a discharge valve is provided on the discharge pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 : Schematic diagram of the structure of the utility model;

[0014] Figure 2 : Schematic diagram of part of the structure of the utility model.

[0015] In the figure: 1. Secondary cleaning tower; 2. Primary electrostatic decoking tower; 3. Pre-sulfur cooling tower; 31. Water inlet pipe; 32. Water outlet pipe; 4. Pre-desulfurization tower; 5. Desulfurization tower; 6. Water seal device; 7. Connecting pipe; 71. Feed pipe; 72. Pre-desulfurization pipe; 721. Pre-desulfurization valve; 73. Desulfurization pipe; 731. Desulfurization valve; 74. Feed pipe; 75. Reflux pipe; 751. Reflux valve; 76. Discharge pipe; 761. Discharge valve; 77. Discharge pipe; 771. Discharge valve; 8. Fan. DETAILED DESCRIPTION

[0016] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0017] according to Figure 1-2 The utility model provides a semi-water gas desulfurization system, comprising: a secondary cleaning tower 1, a primary electrostatic decoking tower 2, a pre-sulfur cooling tower 3, a pre-desulfurization tower 4, a desulfurization tower 5, a water seal device 6, a connecting pipe 7, and a fan 8.

[0018] One end of the primary electrostatic decoking tower 2 is connected to the secondary cleaning tower 1, and the other end is connected to the pre-sulfur cooling tower 3. The pre-sulfur cooling tower 3 is connected to the pre-desulfurization tower 4. The pre-desulfurization tower 4 is connected to the desulfurization tower 5.

[0019] like Figure 1As shown, the multiple structures of the present invention are connected but separated by a distance, so that the structures such as the secondary cleaning tower 1, the primary electrostatic decoking tower 2, the pre-sulfur cooling tower 3, the pre-desulfurization tower 4, and the desulfurization tower 5 form independent modules. Each module can be independently operated, maintained, and repaired, making it more convenient to repair or upgrade the equipment. In addition, the secondary cleaning tower can remove a large amount of organic matter and nitrogen oxides in the coal gas, and the primary electrostatic decoking tower 2 removes tar and dust from the coal gas, so that the coal gas undergoes these processes to treat impurities before desulfurization, reducing the burden on the subsequent desulfurization process. The pre-sulfur cooling tower 3 is used to cool the coal gas so that it can be at a more suitable temperature before desulfurization, so that the sulfurization process has a higher efficiency. The subsequent desulfurization process is equipped with a pre-desulfurization tower 4 and a desulfurization tower 5, and the desulfurization process is divided into two devices, so that different impurities are removed in their respective corresponding ways, avoiding the impurities in one desulfurization process affecting the efficiency of the other desulfurization process.

[0020] A water seal 6 is installed between the secondary cleaning tower 1 and the primary electrostatic decoking tower 2. A water seal 6 is also installed between the primary electrostatic decoking tower 2 and the pre-sulfur cooling tower 3. The pre-sulfur cooling tower 3 also includes an inlet pipe 31 and an outlet pipe 32. The inlet pipe 31 is located at the top of the pre-sulfur cooling tower 3. The outlet pipe 32 is located at the bottom of the pre-sulfur cooling tower 3.

[0021] The present invention is equipped with a water seal device 6. When the system is in operation, pressure fluctuations may occur. The water seal device 6 acts as a barrier to prevent the gas in the primary electrostatic decoking tower from flowing back to the secondary scrubber, preventing such backflow from affecting the normal operation of the equipment and even causing safety accidents. At the same time, when the gas passes through the water seal device 6, some impurities such as dust and tar may be absorbed or trapped by the water, thereby further improving the cleanliness of the gas. This is beneficial for improving the cleaning effect of the coal gas and making subsequent coal gas processing equipment easier to operate. For the pre-sulfur cooling tower 3 of the present invention, its water inlet pipe 31 is arranged at the top of the pre-sulfur cooling tower 3. The water outlet pipe 32 is arranged at the bottom of the pre-sulfur cooling tower 3, and the coal gas inlet of the pre-sulfur cooling tower 3 is near the bottom of the pre-sulfur cooling tower 3, and the coal gas outlet is near the top of the pre-sulfur cooling tower 3. Since water flows from top to bottom and coal gas flows from bottom to top, this design allows water and coal gas to naturally generate convection, promoting the heat exchange process and improving the cooling effect.

[0022] The connecting pipe 7 includes a feed pipe 71, a pre-desulfurization pipe 72, and a desulfurization pipe 73. The feed pipe 71 is connected to the pre-desulfurization cooling tower 3. The pre-desulfurization pipe 72 is connected to the pre-desulfurization cooling tower 3 at one end and to the pre-desulfurization tower 4 at the other end. The desulfurization pipe 73 is connected to the pre-desulfurization cooling tower 3 at one end and to the desulfurization tower 5 at the other end. The connecting pipe 7 also includes a feed pipe 74, a return pipe 75, a discharge pipe 76, and a discharge pipe 77. The feed pipe 74 is connected to the pre-desulfurization tower 4. The return pipe 75 is connected to the feed pipe 74 at one end and to the feed pipe 71 at the other end. The discharge pipe 76 is connected to the feed pipe 74. The discharge pipe 77 is connected to the desulfurization tower 5. The pre-desulfurization pipe 72 is provided with a pre-desulfurization valve 721. The desulfurization pipe 73 is provided with a desulfurization valve 731. The return pipe 75 is provided with a return valve 751. The discharge pipe 76 is provided with a discharge valve 761. The discharge pipe 77 is provided with a discharge valve 771.

[0023] The present invention is equipped with both a pre-desulfurization tower 4 and a desulfurization tower 5, so that the impurities of the coal gas are removed in two separate devices. The pre-desulfurization tower 4 removes pollutants such as dust and particulate matter, while the desulfurization tower 5 removes pollutants such as hydrogen sulfide and sulfur dioxide. If only one desulfurization process is used, not only will the equipment pressure be high, but it may also result in the pollutants not being effectively removed, and thus failing to meet emission standards. However, sometimes the coal gas contains less dust and particulate matter, or less hydrogen sulfide and sulfur dioxide. In such cases, only one type of pollutant needs to be removed to meet emission requirements. In this case, if both removal methods are used simultaneously, some desulfurization materials will be wasted. The utility model is provided with a connecting pipe 7 and some corresponding valves. When it is necessary to use only the pre-desulfurization tower 4, the pre-desulfurization valve 721 and the discharge valve 761 are opened, and the desulfurization valve 731, the reflux valve 751, and the discharge valve 771 are closed. At this time, after the coal gas passes through the pre-sulfurization cooling tower 3, it will enter the pre-desulfurization pipe 72 through the feed pipe 71, then enter the pre-desulfurization tower 4, and then reach the feed pipe 74 and be discharged from the discharge pipe 76. In this process, the coal gas does not pass through the desulfurization tower 5. When it is necessary to use only the desulfurization tower 5, the desulfurization valve 731 and the discharge valve 771 are opened, and the pre-desulfurization valve 721, the reflux valve 751, and the discharge valve 761 are closed. At this time, after the coal gas passes through the pre-sulfurization cooling tower 3, it will enter the desulfurization pipe 73 through the feed pipe 71, then enter the desulfurization tower 5, and then be discharged from the discharge pipe 77. In this process, the coal gas does not pass through the pre-desulfurization tower 4. When the pre-desulfurization tower 4 and the desulfurization tower 5 need to be used simultaneously, the pre-desulfurization valve 721 and the reflux valve 751 are first opened, and the desulfurization valve 731, the discharge valve 761, and the discharge valve 771 are closed. At this time, after the coal gas passes through the pre-sulfurization cooling tower 3, it will enter the pre-desulfurization pipe 72 through the feed pipe 71, then enter the pre-desulfurization tower 4, then enter the feed pipe 74, and then enter the reflux pipe 75. At this time, the pre-desulfurization valve 721 is closed again, and the desulfurization valve 731 and the discharge valve 771 are opened. The coal gas will reach the feed pipe 71 from the reflux pipe 75, then enter the desulfurization pipe 73, and then enter the desulfurization tower 5. After being processed in the desulfurization tower 5, it will be discharged from the discharge pipe 77. According to the specific situation of the coal gas, different treatment methods can be used to save desulfurization materials.

[0024] The working principle and use process of this utility model:

[0025] When the utility model is in use, first open the pre-desulfurization valve 721 and the reflux valve 751, close the desulfurization valve 731, the discharge valve 761, and the discharge valve 771, then start the fan 8 to pass the coal gas into the secondary cleaning tower 1. After passing through the secondary cleaning tower 1, the coal gas passes through the water seal device 6 and enters the primary electrostatic decoking tower 2. Then, it passes through the water seal device 6 and enters the pre-sulfur cooling tower 3. After leaving the pre-sulfur cooling tower 3, the coal gas enters the conveying pipe 71. Then it enters the pre-desulfurization pipe 72 and then the pre-desulfurization tower 4. When all the coal gas has entered the pre-desulfurization tower 4, the pre-desulfurization valve 721 is closed, and the desulfurization valve 731 and the discharge valve 771 are opened, so that the coal gas leaves the pre-desulfurization tower 4 and enters the feed pipe 74. Then, it passes through the reflux pipe 75 to reach the conveying pipe 71, and then enters the desulfurization pipe 73 and enters the desulfurization tower 5. After the coal gas is processed in the desulfurization tower 5, it is discharged from the discharge pipe 77.

[0026] In summary, the utility model connects the various structures independently so that each structure can complete its own work independently without interfering with each other, making it more convenient when equipment needs to be repaired and upgraded. In addition, the process treats the coal gas more thoroughly and the desulfurization efficiency of the coal gas is higher.

[0027] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.

Claims

1. A semi-water gas desulfurization system, characterized by: include: Secondary cleaning tower (1), primary electrostatic decoking tower (2), pre-sulfur cooling tower (3), pre-desulfurization tower (4), desulfurization tower (5); One end of the first-stage electrostatic decoking tower (2) is connected to the second-stage cleaning tower (1), and the other end is connected to the pre-sulfur cooling tower (3); The pre-sulfur cooling tower (3) is in communication with the pre-desulfurization tower (4); The pre-desulfurization tower (4) is communicated with the desulfurization tower (5).

2. A semi-water gas desulfurization system according to claim 1, characterized in that: It also includes: a water sealing device (6); The water seal device (6) is provided between the secondary cleaning tower (1) and the primary electrostatic decoking tower (2); The water seal device (6) is provided between the first-level electrostatic decoking tower (2) and the pre-sulfur cooling tower (3).

3. The semi-water gas desulfurization system according to claim 1, characterized in that: The pre-sulfur cooling tower (3) further comprises: a water inlet pipe (31) and a water outlet pipe (32); The water inlet pipe (31) is arranged at the top of the pre-sulfur cooling tower (3); The water outlet pipe (32) is arranged at the bottom of the pre-sulfur cooling tower (3).

4. A semi-water gas desulfurization system according to claim 1, characterized in that: It also includes: a connecting pipe (7); The connecting pipe (7) comprises: a material delivery pipe (71), a pre-desulfurization pipe (72), and a desulfurization pipe (73); The feed pipe (71) is connected to the pre-sulfur cooling tower (3); One end of the pre-desulfurization pipe (72) is connected to the pre-sulfurization cooling tower (3), and the other end is connected to the pre-desulfurization tower (4); One end of the desulfurization pipe (73) is connected to the pre-sulfurization cooling tower (3), and the other end is connected to the desulfurization tower (5).

5. A semi-water gas desulfurization system according to claim 4, characterized in that: The connecting pipe (7) further comprises: a feeding pipe (74), a reflux pipe (75), a discharge pipe (76), and a discharge pipe (77); The feeding pipe (74) is connected to the pre-degassing tower (4); One end of the return pipe (75) is connected to the feed pipe (74), and the other end is connected to the delivery pipe (71); The discharge pipe (76) is connected to the feed pipe (74); The discharge pipe (77) is connected to the desulfurization tower (5).

6. A semi-water gas desulfurization system according to claim 5, characterized in that: The pre-degassing pipe (72) is provided with a pre-degassing valve (721); The desulfurization pipe (73) is provided with a desulfurization valve (731); The reflux pipe (75) is provided with a reflux valve (751).

7. The semi-water gas desulfurization system according to claim 5, characterized in that: The discharge pipe (76) is provided with a discharge valve (761); The discharge pipe (77) is provided with a discharge valve (771).

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