Device for improving property of fuel gas
By using a combination of desulfurization, trace solvent removal, and liquid phase removal components, the problem of incomplete removal of organic sulfur from dry gas in existing technologies has been solved, achieving efficient purification of dry gas, avoiding the risk of SO2 exceeding environmental standards in furnace flue gas, and improving the combustion quality of fuel gas.
Patent Information
- Application Number
- CN202520319793.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-26
- Publication Date
- 2026-02-03
- Estimated Expiration
- 2035-02-26
AI Technical Summary
The dry gas from delayed coking has a high content of organic sulfur, which cannot be completely removed by existing amine desulfurization methods, resulting in SO2 emissions from the heating furnace flue gas exceeding environmental standards.
A combination of mercaptan removal, trace solvent removal, and liquid phase removal components is used to remove mercaptan, trace solvent, and liquid phase from dry gas through mercaptan removal, trace solvent removal, and liquid phase removal, respectively, forming refined dry gas that enters the fuel gas pipeline network.
It effectively reduces the content of mercaptans and trace solvents in dry gas, avoids exceeding the environmental protection standards for SO2 in the flue gas of the heating furnace, and improves the quality of fuel gas.
Smart Images
Figure CN223866576U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of chemical production, and in particular to a device for improving the properties of fuel gas. Background Technology
[0002] In recent years, my country's chemical industry has developed rapidly, and the country has vigorously promoted the development of green and environmentally friendly technologies. Environmental protection is an important development goal for my country.
[0003] The delayed coking unit is a heavy oil processing unit. The purified dry gas produced by the delayed coking unit is used as fuel gas and incorporated into the company's fuel gas system. Due to the high total sulfur content of the purified dry gas from delayed coking, the existing amine desulfurization system cannot remove the organic sulfur portion of the purified dry gas, which leads to the risk of exceeding the SO2 environmental protection standard in the flue gas of the heating furnace. Utility Model Content
[0004] To solve the above-mentioned technical problems, this utility model provides a device for improving the properties of fuel gas.
[0005] This invention discloses a device for improving the properties of fuel gas, comprising a mercaptan removal component, a trace solvent removal component, and a liquid phase removal component. These components are sequentially connected via pipelines. The mercaptan removal component removes mercaptan from the dry gas; the trace solvent removal component removes trace solvents from the dry gas; and the liquid phase removal component removes the liquid phase carried by the dry gas. The dry gas, after inorganic sulfur removal from the dry gas desulfurization tower, enters the mercaptan removal component for mercaptan removal. After mercaptan removal, the dry gas enters the trace solvent removal component to remove trace solvents, and then enters the liquid phase removal component to remove the carried liquid phase. The refined dry gas is then incorporated into the fuel gas pipeline network, avoiding the risk of exceeding SO2 environmental standards in the boiler flue gas.
[0006] Preferably, the desulfurization component includes a dry gas desulfurization tower and a dry gas-alkali circulation pump group. The dry gas-alkali circulation pump group is used to transport the alkali to the top of the dry gas desulfurization tower and simultaneously to the alkali regeneration tower. The dry gas desulfurization tower is used for contacting the alkali with the dry gas after the removal of inorganic sulfur. The alkali-rich liquid at the bottom of the dry gas desulfurization tower is extracted by the dry gas water washing and refining tower and divided into two paths. One path is mixed with the regenerated lean alkali liquid from the alkali regeneration tower and returned to the upper part of the dry gas desulfurization tower. The other path is returned to the lower part of the alkali regeneration tower for desulfurization regeneration. The dry gas after the removal of inorganic sulfur from the dry gas desulfurization tower enters the bottom of the dry gas desulfurization tower. The dry gas comes from bottom to top and comes into counter-current contact with the regenerated lean alkali liquid flowing down from the top of the tower. The mercaptans in the dry gas are absorbed by the regenerated lean alkali liquid. After desulfurization, the dry gas enters the trace solvent removal component.
[0007] Preferably, the trace solvent removal assembly includes a dry gas washing and refining tower and a dry gas washing and refining circulating pump set. The dry gas washing and refining circulating pump set is used to transport demineralized water and extract circulating water from the bottom of the dry gas washing and refining tower. The dry gas washing and refining tower is used to wash the dry gas. After desulfurization, the dry gas enters the bottom of the dry gas washing and refining tower. The dry gas comes into counter-current contact with the demineralized water flowing down from the top of the tower to remove trace solvents. The circulating water at the bottom of the dry gas washing and refining tower is extracted by the dry gas washing and refining circulating pump set and divided into two paths. One path returns to the upper part of the dry gas washing and refining tower, and the other path is sent to the sulfur-containing wastewater pipeline network for treatment at the wastewater treatment plant.
[0008] Preferably, the liquid phase removal component is a dry gas water washing coalescer; after the dry gas passes through the desulfurization and trace solvent removal processes, it enters the dry gas water washing coalescer to remove the liquid phase carried in the dry gas.
[0009] Compared with the prior art, the beneficial effects of this utility model are as follows: the dry gas after the removal of inorganic sulfur from the dry gas desulfurization tower enters the mercaptan removal component for mercaptan removal. After mercaptan removal, the dry gas enters the trace solvent removal component to remove trace solvents. Then, the dry gas enters the liquid phase removal component to remove the carried liquid phase. The refined dry gas is then incorporated into the fuel gas pipeline network, thus avoiding the risk of exceeding the SO2 environmental protection standards in the flue gas of the heating furnace. Attached Figure Description
[0010] Figure 1 This is a schematic diagram of the structure of this utility model.
[0011] The following are labels in the attached diagram: 1. Dry gas desulfurization tower; 2. Dry gas water washing and refining tower; 3. Dry gas water washing coalescer; 4. Dry gas alkali circulation pump set; 5. Dry gas water washing and refining circulation pump set. Detailed Implementation
[0012] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. This utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the disclosure of this utility model more thorough and complete.
[0013] Example 1
[0014] like Figure 1 As shown, the present invention provides a device for improving the properties of fuel gas, comprising a mercaptan removal component, a trace solvent removal component, and a liquid phase removal component. The mercaptan removal component, the trace solvent removal component, and the liquid phase removal component are connected in sequence through pipelines. The mercaptan removal component is used to remove mercaptan from the dry gas, the trace solvent removal component is used to remove trace solvents from the dry gas, and the liquid phase removal component is used to remove the liquid phase carried by the dry gas.
[0015] The desulfurization assembly includes a dry gas desulfurization tower 1 and a dry gas alkaline solution circulation pump group 4. The dry gas alkaline solution circulation pump group 4 is used to transport the alkaline solution to the top of the dry gas desulfurization tower 1 and simultaneously to the alkaline solution regeneration tower. The dry gas desulfurization tower 1 is used to contact the alkaline solution with the dry gas after the removal of inorganic sulfur.
[0016] The trace solvent removal assembly includes a dry gas washing and refining tower 2 and a dry gas washing and refining circulating pump group 5. The dry gas washing and refining circulating pump group 5 is used to transport demineralized water and extract circulating water from the bottom of the dry gas washing and refining tower 2. The dry gas washing and refining tower 2 is used to wash the dry gas with water.
[0017] In this embodiment, the alkaline-rich liquid at the bottom of the dry gas desulfurization tower 1 is extracted by the dry gas water washing and refining tower 2 and split into two paths. One path is mixed with the regenerated lean alkaline liquid from the alkaline regeneration tower and returned to the upper part of the dry gas desulfurization tower 1. The other path is returned to the lower part of the alkaline regeneration tower for desulfurization regeneration. The dry gas after the removal of inorganic sulfur from the dry gas desulfurization tower enters the bottom of the dry gas desulfurization tower 1. The dry gas comes from bottom to top and comes into counter-current contact with the regenerated lean alkaline liquid flowing down from the top of the tower. The mercaptans in the dry gas are absorbed by the regenerated lean alkaline liquid. After desulfurization, the dry gas enters the dry gas water washing and refining tower 2. After desulfurization, the dry gas enters the bottom of the dry gas water washing and refining tower 2. The dry gas comes from bottom to top and comes into counter-current contact with the demineralized water flowing down from the top of the tower to remove trace amounts of solvent. The circulating water at the bottom of the dry gas water washing and refining tower 2 is extracted by the dry gas water washing and refining circulating pump group 5 and split into two paths. One path returns to the upper part of the dry gas water washing and refining tower 2, and the other path is sent to the sulfur-containing sewage pipeline network for treatment at the sewage treatment plant.
[0018] Example 2
[0019] like Figure 1 As shown, the present invention provides a device for improving the properties of fuel gas, comprising a mercaptan removal component, a trace solvent removal component, and a liquid phase removal component. The mercaptan removal component, the trace solvent removal component, and the liquid phase removal component are connected in sequence through pipelines. The mercaptan removal component is used to remove mercaptan from the dry gas, the trace solvent removal component is used to remove trace solvents from the dry gas, and the liquid phase removal component is used to remove the liquid phase carried by the dry gas.
[0020] The desulfurization assembly includes a dry gas desulfurization tower 1 and a dry gas alkaline solution circulation pump group 4. The dry gas alkaline solution circulation pump group 4 is used to transport the alkaline solution to the top of the dry gas desulfurization tower 1 and simultaneously to the alkaline solution regeneration tower. The dry gas desulfurization tower 1 is used to contact the alkaline solution with the dry gas after the removal of inorganic sulfur.
[0021] The trace solvent removal assembly includes a dry gas washing and refining tower 2 and a dry gas washing and refining circulating pump group 5. The dry gas washing and refining circulating pump group 5 is used to transport demineralized water and extract circulating water from the bottom of the dry gas washing and refining tower 2. The dry gas washing and refining tower 2 is used to wash the dry gas with water.
[0022] The liquid phase removal component is a dry gas-water washing coalescer 3.
[0023] In this embodiment, the alkali-rich liquid at the bottom of the dry gas desulfurization tower 1 is extracted by the dry gas washing and refining tower 2 and split into two streams. One stream is mixed with the regenerated lean alkali liquid from the alkali regeneration tower and returned to the upper part of the dry gas desulfurization tower 1. The other stream returns to the lower part of the alkali regeneration tower for desulfurization regeneration. The dry gas, after the removal of inorganic sulfur from the dry gas desulfurization tower, enters the bottom of the dry gas desulfurization tower 1. The dry gas comes into counter-current contact with the regenerated lean alkali liquid flowing down from the top of the tower. The mercaptans in the dry gas are absorbed by the regenerated lean alkali liquid. After desulfurization, the dry gas enters the dry gas washing and refining tower 1. In the gas-water washing purification tower 2, the dry gas after mercaptan removal enters the bottom of the dry gas-water washing purification tower 2. The dry gas comes into countercurrent contact with the demineralized water flowing down from the top of the tower to remove trace amounts of solvent. The circulating water at the bottom of the dry gas-water washing purification tower 2 is drawn out by the dry gas-water washing purification circulating pump group 5 and split into two paths. One path returns to the upper part of the dry gas-water washing purification tower 2, and the other path is sent to the sulfur-containing sewage pipeline network to the sewage treatment plant for treatment. After mercaptan removal and removal of trace amounts of solvent, the dry gas enters the dry gas-water washing coalescer 3 to remove the liquid phase carried in the dry gas.
[0024] The dry gas desulfurization tower 1 of the device for improving the properties of fuel gas of this utility model is purchased from the market. Technical personnel in this industry only need to install and operate it according to the accompanying instruction manual, without requiring any creative work from those skilled in the art.
[0025] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.
Claims
1. An apparatus for improving the properties of fuel gas, comprising a mercaptan removal unit, a trace solvent removal unit, and a liquid phase removal unit, characterized in that, The mercaptan removal component, the trace solvent removal component, and the liquid phase removal component are connected in sequence via pipelines. The mercaptan removal component is used to remove mercaptan from the dry gas, the trace solvent removal component is used to remove trace solvents from the dry gas, and the liquid phase removal component is used to remove the liquid phase carried by the dry gas.
2. The apparatus for improving the properties of fuel gas as described in claim 1, characterized in that, The desulfurization assembly includes a dry gas desulfurization tower (1) and a dry gas alkali circulation pump group (4). The dry gas alkali circulation pump group (4) is used to transport alkali to the top of the dry gas desulfurization tower (1) and simultaneously transport alkali to the alkali regeneration tower. The dry gas desulfurization tower (1) is used to contact the alkali with the dry gas after the removal of inorganic sulfur.
3. The apparatus for improving the properties of fuel gas as described in claim 2, characterized in that, The trace solvent removal assembly includes a dry gas washing and refining tower (2) and a dry gas washing and refining circulating pump group (5). The dry gas washing and refining circulating pump group (5) is used to transport demineralized water and extract circulating water from the bottom of the dry gas washing and refining tower (2). The dry gas washing and refining tower (2) is used to wash the dry gas with water.
4. The apparatus for improving the properties of fuel gas as described in claim 1, characterized in that, The liquid phase removal component is a dry gas-water washing coalescer (3).