Unorganized gas treatment device for liquid sulfur tank of Claus system
By designing an unorganized gas treatment device in the liquid sulfur tank of the Klaus system, and using heat tracing pipelines and alkali absorption towers to treat the unorganized gas in the liquid sulfur tank, the unorganized emission of hydrogen sulfide and sulfur dioxide in the exhaust gas of chemical enterprises is solved. The problem has achieved a safe and environmentally friendly treatment effect.
Patent Information
- Application Number
- CN202421116898.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-21
- Publication Date
- 2025-01-07
- Estimated Expiration
- 2034-05-21
AI Technical Summary
The exhaust gas produced by chemical companies in the process of producing carbon disulfide and dimethyl sulfoxide contains acid gases such as hydrogen sulfide and sulfur dioxide, resulting in unorganized emission pollution in the liquid sulfur tank, which is difficult to effectively deal with in the existing technology.
A non-organized gas treatment device for liquid sulfur tank of Klaus system is designed, including liquid sulfur tank, heat tracing pipeline, fan, alkali absorption tower and distillation tower. The unorganized gas enters the heat tracing pipeline through negative pressure and liquefies it. And reflux, the alkali absorption tower conducts countercurrent contact of alkali liquid to generate salt and separate by-product gas. The distillation tower removes trace by-product gas to avoid environmental pollution.
Effectively treat volatile waste gases in liquid sulfur tanks, avoid environmental pollution, ensure the safety of liquid sulfur tanks, reduce treatment costs, improve the utilization rate of alkali liquids, and meet environmental protection requirements.
Smart Images
Figure CN222312728U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of chemical industry, in particular to an unorganized gas processing device of a Claus system liquid sulfur tank. Background Art
[0002] Chemical companies use sulfur as a raw material when producing products such as carbon disulfide and dimethyl sulfoxide. The tail gas produced during the production of these products contains acidic gases such as hydrogen sulfide and sulfur dioxide. The Claus system is required to catalyze the hydrogen sulfide and sulfur dioxide in the tail gas to produce liquid sulfur. Usually, this liquid sulfur is stored in a liquid sulfur tank and used as a raw material.
[0003] However, since the liquid sulfur tank cannot be designed as a closed container, a small amount of sulfur therein forms a vapor phase, mixed with a small amount of hydrogen sulfide and sulfur dioxide that have not reacted completely, and evaporates into the air, causing unorganized emission pollution.
[0004] Therefore, how to deal with these unorganized exhaust gases to avoid environmental pollution is an urgent problem to be solved by technicians in this field. Summary of the invention
[0005] The purpose of the utility model is to provide an unorganized gas treatment device for a liquid sulfur tank of a Claus system in view of the deficiencies in the prior art. The device has a simple structure and is easy to maintain. The device can effectively treat the volatile waste gas of the liquid sulfur tank and meet environmental protection requirements on the basis of ensuring the safety of the liquid sulfur tank.
[0006] The technical scheme of the utility model is: an unorganized gas processing device of a liquid sulfur tank of a Claus system, comprising a liquid sulfur tank, a heat tracing pipeline, a fan, an alkali liquid absorption tower, and a distillation tower, wherein the notch of the liquid sulfur tank is closed, one end of the heat tracing pipeline is communicated with the liquid sulfur tank, and the other end extends upward and is connected to the alkali liquid absorption tower through the fan, the top exhaust port of the alkali liquid absorption tower is connected to a tail gas treatment system, the bottom drain port of the alkali liquid absorption tower supplies materials to the distillation tower, the top exhaust port of the distillation tower is connected to the tail gas treatment system, and the bottom drain port of the distillation tower is connected to a liquid inlet of the alkali liquid absorption tower through a reflux pipeline.
[0007] The reflux pipeline is provided with an infusion pump and a first valve, and the first valve is located downstream of the infusion pump.
[0008] The reflux pipeline is provided with a collection tube, which is located between the infusion pump and the first valve, and the collection tube is provided with a second valve.
[0009] The heating pipeline extends vertically upward, and the temperature of the heating pipeline is higher than the melting point of sulfur and lower than the boiling point of sulfur.
[0010] The bottom liquid discharge port of the alkali liquid absorption tower is connected to the liquid inlet of the alkali liquid absorption tower through a circulation pipeline, and a delivery pump and a third valve are arranged on the circulation pipeline.
[0011] The above technical solution has the following beneficial effects:
[0012] 1. The unorganized gas treatment device of the Claus system liquid sulfur tank includes a liquid sulfur tank, a heating pipeline, a fan, an alkali liquid absorption tower, and a distillation tower. The liquid sulfur tank is used to collect and temporarily store liquid sulfur discharged from the Claus system, the heating pipeline is used to liquefy the vapor phase sulfur in the volatile gas and reflux, the alkali liquid absorption tower is used to solidify the hydrogen sulfide, sulfur dioxide and other gases in the volatile gas generated by the liquid sulfur tank, and the distillation tower is used to remove trace by-product gases mixed in the absorption rich liquid to avoid the enrichment of by-product gases in the absorption rich liquid and ensure the safety of downstream processes. The notch of the liquid sulfur tank is closed, one end of the heating pipeline is connected to the liquid sulfur tank, and the other end extends upward and is connected to the alkali liquid absorption tower through a fan. The unorganized gas (including unreacted hydrogen sulfide, sulfur dioxide, a small amount of vapor sulfur and a trace amount of by-product gas) generated in the liquid sulfur tank enters the alkali liquid absorption tower through the heating pipeline under the action of negative pressure, and a small amount of liquid sulfur is liquefied in the heating pipeline and remains in liquid state, and flows back to the liquid sulfur tank under the action of gravity, and the remaining gas phase enters the alkali liquid absorption tower and contacts the alkali liquid of the alkali liquid absorption tower in countercurrent, and the hydrogen sulfide and sulfur dioxide react with the alkali liquid to generate corresponding salts, and the trace by-product gas is dissolved in the alkali liquid or insoluble in the alkali liquid. The top exhaust port of the alkali liquid absorption tower is connected to the tail gas treatment system, and the trace by-product gas insoluble in the alkali liquid is discharged to the tail gas treatment system through the top exhaust port of the alkali liquid absorption tower for centralized treatment to avoid environmental pollution. The bottom discharge port of the alkali liquid absorption tower supplies the distillation tower, and the top exhaust port of the distillation tower is connected to the tail gas treatment system. The trace by-product gas dissolved in the absorption rich liquid is separated from the absorption rich liquid by distillation, and discharged to the tail gas treatment system through the top exhaust port of the distillation tower for centralized treatment, thereby avoiding environmental pollution and preventing the by-product gas from being enriched in the absorption rich liquid. The bottom discharge port of the distillation tower is connected to the liquid inlet of the alkali liquid absorption tower through a reflux pipeline, and is supplemented to the alkali liquid absorption tower as the absorption lean liquid, thereby improving the utilization rate of the alkali liquid and reducing the treatment cost.
[0013] 2. An infusion pump and a first valve are provided on the reflux pipeline, and the first valve is located downstream of the infusion pump. A production pipe is provided on the reflux pipeline, which is located between the infusion pump and the first valve. A second valve is provided on the production pipe. Normally, the second valve is in a closed state. When it is detected that the salt concentration in the refluxed rich absorption liquid reaches the production standard, the first valve is closed and the second valve is opened to discharge the rich absorption liquid and sell it to a third party for processing to meet the actual needs of the enterprise.
[0014] 3. The heating pipeline extends vertically upward. The temperature of the heating pipeline is higher than the melting point of sulfur and lower than the boiling point of sulfur, so that the liquid sulfur in the unorganized gas is converted into liquid and kept flowing back to the liquid sulfur tank in liquid state, avoiding blockage of the downstream setting and ensuring the long-term normal operation of the treatment device.
[0015] Further description is given below in conjunction with the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a connection diagram of the utility model.
[0017] In the attached drawings, 1 is a liquid sulfur tank, 2 is a heating pipeline, 3 is a fan, 4 is an alkali solution absorption tower, 5 is a distillation tower, 6 is a reflux pipeline, 7 is an infusion pump, 8 is a first valve, 9 is a production pipe, 10 is a second valve, 11 is a circulation pipeline, 12 is a delivery pump, and 13 is a third valve. DETAILED DESCRIPTION
[0018] See also Figure 1 , which is a specific embodiment of an unorganized gas treatment device for a Claus system liquid sulfur tank. The unorganized gas treatment device for a Claus system liquid sulfur tank includes a liquid sulfur tank 1. Obviously, the liquid sulfur tank is provided with a heat preservation system to keep the sulfur in the liquid sulfur tank in a liquid phase. It also includes a heating pipeline 2, a fan 3, an alkali liquid absorption tower 4, and a distillation tower 5. The notch of the liquid sulfur tank 1 is closed, one end of the heating pipeline 2 is connected to the liquid sulfur tank 1, and the other end extends vertically upward and is connected to the alkali liquid absorption tower 4 through the fan 3. Obviously, it is connected to the lower part of the alkali liquid absorption tower, which is conducive to countercurrent contact with the alkali liquid. The temperature of the heating pipeline is higher than the melting point of sulfur and lower than the boiling point of sulfur. Usually, the temperature of the heating pipeline is slightly higher than the melting point of sulfur, which can make the vapor sulfur liquefied when passing through the heating pipeline and reflux to the liquid sulfur tank, and does not require excessive power, thereby reducing the processing cost. The top exhaust port of the alkali liquid absorption tower 4 is connected to the tail gas treatment system, and the bottom drainage port of the alkali liquid absorption tower 4 supplies the distillation tower 5. Usually, the bottom drainage port of the alkali liquid absorption tower 4 is connected to the liquid inlet of the alkali liquid absorption tower through a circulation pipeline 11. The circulation pipeline 11 is provided with a delivery pump 12 and a third valve 13, so that the alkali liquid entering the alkali liquid absorption tower circulates in the alkali liquid absorption tower to reduce the absorption cost of the unorganized gas. The top exhaust port of the distillation tower 5 is connected to the tail gas treatment system, and the bottom drainage port of the distillation tower 5 is connected to the liquid inlet of the alkali liquid absorption tower 4 through a reflux pipeline 6. Specifically, the reflux pipeline 6 is provided with an infusion pump 7 and a first valve 8, and the first valve 8 is located downstream of the infusion pump 7. In this embodiment, the reflux pipeline 6 is provided with a production pipe 9, which is located between the infusion pump 7 and the first valve 8, and the production pipe 9 is provided with a second valve 10.
[0019] The working principle of the utility model is as follows: the unorganized gas (including unreacted hydrogen sulfide, sulfur dioxide, a small amount of vapor sulfur and a trace amount of by-product gas) generated in the liquid sulfur tank enters the alkali liquid absorption tower through the heating pipeline under the action of negative pressure (generated by the fan), a small amount of liquid sulfur therein is liquefied in the heating pipeline and kept in liquid state, and flows back to the liquid sulfur tank under the action of gravity, and the remaining gas phase enters the alkali liquid absorption tower and contacts with the alkali liquid in the alkali liquid absorption tower in countercurrent, the hydrogen sulfide and sulfur dioxide therein react with the alkali liquid to generate corresponding salts, and the trace amount of by-product gas insoluble in the alkali liquid is discharged to the tail gas treatment system through the top exhaust port of the alkali liquid absorption tower for centralized treatment, so as to avoid environmental pollution. Part of the absorbed rich liquid at the bottom of the alkali liquid absorption tower is recycled in the alkali liquid absorption tower through the circulation pipeline, and part of the absorbed rich liquid enters the distillation tower, where the trace by-product gas dissolved in the absorbed rich liquid is separated from the absorbed rich liquid by distillation, and discharged to the tail gas treatment system through the top exhaust port of the distillation tower for centralized treatment, avoiding environmental pollution and preventing the by-product gas from being enriched in the absorbed rich liquid. The absorbed lean liquid from which the trace by-product gas is separated is supplemented to the alkali liquid absorption tower through the reflux pipeline and used as absorbed lean liquid. When it is detected that the salt concentration in the reflux liquid reaches the extraction standard, the first valve is closed and the second valve is opened to discharge the absorbed rich liquid and sell it to a third party for treatment to meet the actual needs of the enterprise.
Claims
1. A fugitive gas treatment device for a Claus system liquid sulfur tank, comprising a liquid sulfur tank (1), characterized in that: It also includes a heating pipeline (2), a fan (3), an alkali solution absorption tower (4), and a distillation tower (5). The notch of the liquid sulfur tank (1) is closed, One end of the heat tracing pipeline (2) is connected to the liquid sulfur tank (1), and the other end extends upward and is connected to the alkali liquid absorption tower (4) through the fan (3). The top exhaust port of the alkali liquid absorption tower (4) is connected to the tail gas treatment system, and the bottom discharge port of the alkali liquid absorption tower (4) supplies materials to the distillation tower (5). The top exhaust port of the distillation tower (5) is connected to the tail gas treatment system, and the bottom liquid discharge port of the distillation tower (5) is connected to the liquid inlet of the alkali solution absorption tower (4) via a reflux pipeline (6).
2. The unorganized gas treatment device of the Claus system liquid sulfur tank according to claim 1, characterized in that: The return pipeline (6) is provided with an infusion pump (7) and a first valve (8), and the first valve (8) is located downstream of the infusion pump (7).
3. The unorganized gas treatment device of the Claus system liquid sulfur tank according to claim 2, characterized in that: The reflux pipeline (6) is provided with a collection pipe (9) located between the infusion pump (7) and the first valve (8), and a second valve (10) is provided on the collection pipe (9).
4. The unorganized gas treatment device of the Claus system liquid sulfur tank according to claim 1, characterized in that: The heating pipeline (2) extends vertically upward, and the temperature of the heating pipeline is higher than the melting point of sulfur and lower than the boiling point of sulfur.
5. The unorganized gas treatment device of the Claus system liquid sulfur tank according to claim 1, characterized in that: The bottom liquid discharge port of the alkali liquid absorption tower (4) is connected to the liquid inlet of the alkali liquid absorption tower via a circulation pipeline (11), and a delivery pump (12) and a third valve (13) are arranged on the circulation pipeline (11).