A full-automatic waste gas treatment device for liquid sulfur storage tank of a natural gas purification device

Abstract

The utility model relates to waste gas treatment technical field discloses a kind of natural gas purification device liquid sulfur storage tank waste gas full-automatic processing device, comprising: liquid sulfur storage tank;Liquid sulfur waste gas processor;Alkali liquor storage tank;Cleaning part;Induced draft fan;Control module.The utility model can realize automatic configuration alkali liquor quantity, automatic stirring and cleaning, pollution discharge, liquid level monitoring and other functions, completely replace manual operation, greatly reduce labor intensity and operation risk;Effective absorption is carried out to the waste gas discharged from the top of liquid sulfur storage tank, further reduces the operation risk of the periphery of storage tank, avoids the problem that operator long-term contact with toxic gas seriously harms the health of operator;The removal rate of H2S and H2Sx content in exhaust gas can reach 99%, the H2S and H2Sx content in exhaust gas reaches below 2ppm;And processing process mainly relies on hydration absorption reaction, safe and reliable, no toxic gas is produced, no explosion danger, strong practicability, low operating cost, further improve safety.

Description

Technical Field

[0001] This utility model relates to the field of waste gas treatment technology, specifically, it is a fully automatic waste gas treatment device for liquid sulfur storage tanks in natural gas purification devices. Background Technology

[0002] Hydrogen sulfide (H2S) is often produced during natural gas extraction. It is an acidic gas that oxidizes in the atmosphere to produce SO2, which can easily lead to acid rain and smog. Therefore, direct emissions can threaten human health and the ecological environment.

[0003] Liquid sulfur produced by industrial production facilities is degassed before entering liquid sulfur storage tanks or being directly sent to molding equipment. The gas released during degassed processes in the liquid sulfur tank's gas phase space contains trace amounts of hydrogen sulfide (H2S), polysulfides (H2Sx), sulfur vapor, and SO2. Currently, most domestic liquid sulfur degassed processes use bubbling air stripping, allowing the trace amounts of hydrogen sulfide (H2S), polysulfides (H2Sx), sulfur vapor, and SO2 in the liquid sulfur to evaporate naturally. While this method can remove some dissolved H2S and H2Sx, the removal is not ideal. As a result, even after prolonged residence in the storage tank, and with the added insulation within the tank, small amounts of H2S and H2Sx still leak out of the storage area, triggering online fixed H2S detector alarms. This fails to meet the requirements for long-term safe storage and environmental protection. Utility Model Content

[0004] The purpose of this utility model is to provide a fully automatic waste gas treatment device for liquid sulfur storage tanks in natural gas purification equipment, which solves the problem in the prior art that a small amount of hydrogen sulfide (H2S) and polysulfides (H2Sx) still leak out during the storage process after liquid sulfur degassing.

[0005] This utility model is achieved through the following technical solution: a fully automatic waste gas treatment device for liquid sulfur storage tanks in a natural gas purification system, comprising:

[0006] A liquid sulfur storage tank for loading liquid sulfur, wherein the liquid sulfur storage tank is provided with an exhaust gas outlet at the top;

[0007] A liquid sulfur waste gas processor is used to treat liquid sulfur. The liquid sulfur waste gas processor is provided with a processor discharge port at the top and a waste discharge port and an air inlet at the bottom. A pipe is installed on the air inlet and is connected to the waste gas outlet.

[0008] An alkali storage tank is used to store alkali solution. The alkali storage tank is equipped with a drain port, and a metering pump is installed at the drain port. The metering pump delivers the alkali solution into the liquid sulfur waste gas processor through a pipeline.

[0009] The cleaning unit includes a water supply pipe, an electromagnetic flow meter, and a first solenoid valve. The electromagnetic flow meter and the first solenoid valve are both installed on the water supply pipe, which is connected to the liquid sulfur waste gas processor.

[0010] An induced draft fan is installed between the liquid sulfur storage tank and the liquid sulfur waste gas processor to blow the gas at the waste gas outlet into the liquid sulfur waste gas processor.

[0011] The control module, which is a PLC control cabinet, is used to control the induced draft fan, the first solenoid valve, and the metering pump.

[0012] To better realize this utility model, a bag filter is further provided between the induced draft fan and the exhaust gas outlet. The gas flows from the exhaust gas outlet to the bag filter, is filtered by the bag filter, and then flows to the induced draft fan.

[0013] To better realize this utility model, the liquid sulfur waste gas processor is further provided with an exhaust pipe at the bottom, the exhaust pipe is connected to the air inlet at the bottom of the liquid sulfur waste gas processor, and multiple exhaust holes are arrayed on the exhaust pipe.

[0014] To better realize this utility model, it further includes a stirring device, which is installed on the liquid sulfur waste gas processor and is used to stir the liquid in the liquid sulfur waste gas processor.

[0015] To better realize this utility model, it further includes a waste liquid storage tank, which is connected to the exhaust port of the liquid sulfur waste gas processor via a pipeline, and a second solenoid valve is provided on the pipeline between the liquid sulfur waste gas processor and the waste liquid storage tank.

[0016] To better realize this utility model, the liquid sulfur waste gas processor, waste liquid storage tank, and alkali liquid storage tank are all equipped with level gauges for real-time observation of their respective liquid storage levels.

[0017] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0018] (1) This utility model can realize functions such as automatic configuration of alkali solution, automatic stirring and tank cleaning, automatic cleaning, automatic sewage discharge, and liquid level monitoring, which completely replaces manual operation and greatly reduces labor intensity and operational risks.

[0019] (2) This utility model effectively absorbs the exhaust gas discharged from the top of the liquid sulfur storage tank, further reducing the operational risks around the storage tank and avoiding the problem of operators being seriously harmed by long-term exposure to toxic gases.

[0020] (3) This utility model can achieve a 99% removal rate of H2S and H2Sx content in exhaust gas, and the H2S and H2Sx content in exhaust gas is below 2ppm; and the treatment process mainly relies on hydration absorption reaction, which is safe and reliable, with no toxic gas generated, no explosion hazard, strong practicality, low operating cost, and further improves safety. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0022] The components are: 1-Liquid sulfur storage tank; 2-Bag filter; 3-Liquid sulfur waste gas processor; 4-Waste liquid storage tank; 5-Alkali storage tank; 6-Control module; 7-Waste gas outlet; 8-Exhaust fan; 9-Water supply pipe; 10-Electromagnetic flow meter; 11-First solenoid valve; 12-Metering pump; 13-Stirring device; 14-Second solenoid valve; 15-Level gauge; 16-Processor discharge port. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] Example 1:

[0026] This embodiment provides a fully automatic waste gas treatment device for liquid sulfur storage tanks in a natural gas purification system, specifically as follows: Figure 1 As shown, it includes:

[0027] Liquid sulfur storage tank 1 is used to load liquid sulfur, and the top of the liquid sulfur storage tank 1 is provided with a waste gas outlet 7;

[0028] Liquid sulfur waste gas processor 3 is used to treat liquid sulfur. The top of the liquid sulfur waste gas processor 3 is provided with a processor discharge port 16, which is used to balance the gas pressure inside the liquid sulfur waste gas processor 3 and discharge clean gas. The bottom of the liquid sulfur waste gas processor 3 is also provided with a waste discharge port and an air inlet. A pipe is installed on the air inlet and is connected to the waste gas outlet 7.

[0029] Alkali storage tank 5 is used to load alkali solution. The alkali storage tank 5 is provided with a drain port. A metering pump 12 is provided at the drain port. The metering pump 12 transports the alkali solution into the liquid sulfur waste gas processor 3 through a pipeline.

[0030] The cleaning unit includes a water supply pipe 9, an electromagnetic flow meter 10, and a first electromagnetic valve 11. The electromagnetic flow meter 10 and the first electromagnetic valve 11 are both installed on the water supply pipe 9, and the water supply pipe 9 is connected to the liquid sulfur waste gas processor 3.

[0031] An induced draft fan 8 is installed between the liquid sulfur storage tank 1 and the liquid sulfur waste gas processor 3, and is used to blow the gas at the waste gas outlet 7 into the liquid sulfur waste gas processor 3; the induced draft fan 8 is explosion-proof, and the blades are made of fiberglass to prevent corrosion.

[0032] The control module 6 is a PLC control cabinet (existing technology, the specific configuration will not be described in detail). The induced draft fan 8, the first solenoid valve 11, and the metering pump 12 are all electrically connected to the control module 6. The control module 6 is used to control the induced draft fan 8, the first solenoid valve 11, and the metering pump 12.

[0033] To prevent acidic components in the exhaust gas from corroding the pipes, all pipes are made of PE material, thereby reducing corrosion.

[0034] Although the liquid sulfur underwent bubbling air stripping treatment in the previous liquid sulfur pool, some residue remains in the liquid sulfur storage tank 1. When the control module 6 starts the induced draft fan 8, it extracts the remaining small amount of hydrogen sulfide (H2S) and polysulfides (H2Sx) from the waste gas outlet 7 and blows them into the liquid sulfur waste gas processor 3. Simultaneously, the control module 6 controls the metering pump 12 to automatically pump a certain amount of alkali solution from the alkali solution storage tank 5 into the liquid sulfur waste gas processor 3. This mixes the waste gas with the alkali solution in the liquid sulfur waste gas processor 3, achieving purification through a chemical reaction. The waste liquid is then discharged from the exhaust port at the bottom of the liquid sulfur waste gas processor 3. By reducing or eliminating the overflow of H2S and H2Sx from the waste gas, the problem of the fixed alarm in the storage tank area is resolved. In this embodiment, the alkali solution is a sodium hydroxide solution; the metering pump 12 measures the amount of alkali solution used, achieving precise control of the waste gas neutralization treatment.

[0035] When the alkaline solution reacts with the waste gas, the first solenoid valve 11 opens, and water from the water supply pipe 9 flows into the liquid sulfur waste gas processor 3 to dilute the components after the waste gas reaction. The amount of water supplied can be determined by the electromagnetic flow meter 10. When the amount of water supplied is sufficient, the control module 6 controls the first solenoid valve 11 to close. When the first stage of reaction is completed and all the waste liquid in the liquid sulfur waste gas processor 3 needs to be discharged, the first solenoid valve 11 continues to open. At this time, the water in the water supply pipe 9 begins to rinse the inside of the liquid sulfur waste gas processor 3 to achieve the purpose of cleaning.

[0036] That is, by controlling the induced draft fan 8, the first solenoid valve 11, and the metering pump 12 through the control module 6, the treatment of hydrogen sulfide (H2S) and hydrogen polysulfide (H2Sx) can be automated. On the one hand, it reduces manual metering operations and improves the efficiency of waste gas neutralization and treatment; on the other hand, it reduces the time spent on manual operation, thereby avoiding the problem of operators being seriously harmed by long-term exposure to toxic gases.

[0037] Example 2:

[0038] This embodiment further extends the above embodiment, specifically as follows: Figure 1 As shown, a bag filter 2 is also provided between the exhaust fan 8 and the exhaust gas outlet 7. The gas flows from the exhaust gas outlet 7 to the bag filter 2, is filtered by the bag filter 2, and then flows to the exhaust fan 8.

[0039] The bag filter 2 performs preliminary filtration of the exhaust gas, which can filter out sulfur particles in the exhaust gas and prevent them from clogging subsequent equipment.

[0040] The other parts of this embodiment are the same as those in the above embodiments, and will not be described again.

[0041] Example 3:

[0042] This embodiment further extends the above embodiment, specifically as follows: Figure 1 As shown, the liquid sulfur waste gas processor 3 has an exhaust pipe at its bottom, which is connected to the air inlet at the bottom of the liquid sulfur waste gas processor 3. Multiple φ3mm exhaust holes are arrayed on the exhaust pipe. When waste gas enters the exhaust pipe, it begins to spray out from multiple exhaust holes. By dispersing the large flow of waste gas from a single channel into a small flow of waste gas from multiple channels, the waste gas is ensured to fully contact and react with the alkaline solution, while preventing particulate matter formed by the cooling of sulfur vapor from clogging the exhaust holes.

[0043] Furthermore, it also includes a stirring device 13, which is installed on the liquid sulfur waste gas processor 3 and electrically connected to the control module 6. The stirring device 13 is used to stir the liquid in the liquid sulfur waste gas processor 3. The control module 6 controls the start and stop of the liquid sulfur waste gas processor 3. When the waste gas reacts with the alkaline solution, the stirring device 13 starts to stir the alkaline solution, improving the uniformity of alkaline dispersion and thus increasing the reaction efficiency. When water is sprayed into the liquid sulfur waste gas processor 3 through the water supply pipe 9 to clean it, the stirring of the stirring device 13 can improve the degree of cleanliness.

[0044] The other parts of this embodiment are the same as those in the above embodiments, and will not be described again.

[0045] Example 4:

[0046] This embodiment further extends the above embodiment, specifically as follows: Figure 1 As shown, it also includes a waste liquid storage tank 4, which is connected to the waste outlet of the liquid sulfur waste gas processor 3 via a pipeline. A second solenoid valve 14 is installed on the pipeline between the liquid sulfur waste gas processor 3 and the waste liquid storage tank 4, and the second solenoid valve 14 is electrically connected to the control module 6. In order to ensure that a certain amount of liquid is retained in the liquid sulfur waste gas processor 3 to promote the mixing reaction of waste gas and alkali solution, the waste liquid in the liquid sulfur waste gas processor 3 is usually not completely emptied. When there is too much liquid in the liquid sulfur waste gas processor 3, the control module 6 controls the second solenoid valve 14 to open, and the waste liquid in the liquid sulfur waste gas processor 3 will flow to the waste liquid storage tank 4 for collection.

[0047] The other parts of this embodiment are the same as those in the above embodiments, and will not be described again.

[0048] Example 5:

[0049] This embodiment further extends the above embodiment, specifically as follows: Figure 1 As shown, the liquid sulfur waste gas processor 3, waste liquid storage tank 4, and alkali liquid storage tank 5 are all equipped with level gauges 15 for real-time observation of their respective liquid storage levels.

[0050] The other parts of this embodiment are the same as those in the above embodiments, and will not be described again.

[0051] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A fully automatic waste gas treatment device for liquid sulfur storage tanks in a natural gas purification system, characterized in that, include: A liquid sulfur storage tank (1) is used to load liquid sulfur, and the liquid sulfur storage tank (1) is provided with an exhaust gas outlet (7) at the top; Liquid sulfur waste gas processor (3) is used to treat liquid sulfur. The liquid sulfur waste gas processor (3) is provided with a processor discharge port (16) at the top and a waste discharge port and an air inlet at the bottom. The air inlet is equipped with a pipe and is connected to the waste gas outlet (7). An alkaline storage tank (5) is used to load alkaline solution. The alkaline storage tank (5) is provided with a drain port. A metering pump (12) is provided at the drain port. The metering pump (12) transports the alkaline solution into the liquid sulfur waste gas processor (3) through a pipeline. The cleaning unit includes a water supply pipe (9), an electromagnetic flow meter (10), and a first electromagnetic valve (11). The electromagnetic flow meter (10) and the first electromagnetic valve (11) are both installed on the water supply pipe (9). The water supply pipe (9) is connected to the liquid sulfur waste gas processor (3). An induced draft fan (8) is installed between the liquid sulfur storage tank (1) and the liquid sulfur waste gas processor (3) to blow the gas at the waste gas outlet (7) into the liquid sulfur waste gas processor (3). The control module (6) is a PLC control cabinet used to control the induced draft fan (8), the first solenoid valve (11), and the metering pump (12).

2. The fully automatic waste gas treatment device for liquid sulfur storage tanks in a natural gas purification system according to claim 1, characterized in that: A bag filter (2) is also provided between the induced draft fan (8) and the exhaust gas outlet (7). The gas flows from the exhaust gas outlet (7) to the bag filter (2), is filtered by the bag filter (2), and then flows to the induced draft fan (8).

3. The fully automatic waste gas treatment device for liquid sulfur storage tanks in a natural gas purification system according to claim 2, characterized in that: The liquid sulfur waste gas processor (3) is provided with an exhaust pipe at the bottom, which is connected to the air inlet at the bottom of the liquid sulfur waste gas processor (3), and multiple exhaust holes are arrayed on the exhaust pipe.

4. The fully automatic waste gas treatment device for liquid sulfur storage tanks in a natural gas purification system according to claim 3, characterized in that: It also includes a stirring device (13), which is installed on the liquid sulfur waste gas processor (3) and is used to stir the liquid in the liquid sulfur waste gas processor (3).

5. The fully automatic waste gas treatment device for liquid sulfur storage tanks in a natural gas purification system according to claim 4, characterized in that: It also includes a waste liquid storage tank (4), which is connected to the exhaust port on the liquid sulfur waste gas processor (3) via a pipeline, and a second solenoid valve (14) is installed on the pipeline between the liquid sulfur waste gas processor (3) and the waste liquid storage tank (4).

6. The fully automatic waste gas treatment device for liquid sulfur storage tanks in a natural gas purification system according to claim 5, characterized in that: The liquid sulfur waste gas processor (3), waste liquid storage tank (4), and alkali liquid storage tank (5) are all equipped with level gauges (15) for real-time observation of their respective liquid storage levels.

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