Device for recycling and treating VOC (volatile organic compound) gas in desulfurization process of coal chemical industry

Abstract

The utility model relates to the technical field of gas recovery and treatment, in particular to a device for recovering and treating VOC (volatile organic compound) gas in a desulfurization process in the coal chemical industry, which comprises a regeneration tank and a barren liquor tank for discharging the VOC gas, and conveying pipelines for circulating the discharged VOC gas are mounted at the tops of the regeneration tank and the barren liquor tank. The other end of the conveying pipeline is provided with a liquid collector for preliminarily separating liquid mixed in the VOC gas, the outer surface of the liquid collector is connected with an induced draft fan for conveying the VOC gas in the conveying pipeline through a pipeline, and the outer surface of the induced draft fan is provided with a gas-liquid separation assembly for re-separating the VOC gas through a pipeline. According to the embodiment, when VOC gas passes through the filter plate, the gas flows out of the liquid collector through the gas outlet in the rear of the filter plate, liquid impurities are filtered and impacted on the filter plate, flow down on the surface and are accumulated in the liquid collector, the liquid impurities are discharged through the liquid outlet in the bottom of the liquid collector at regular time, and the effect of preliminarily filtering and separating the liquid impurities mixed in the VOC gas is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of gas recovery and treatment, and more precisely to a device for recovering and treating VOC gas during the desulfurization process of coal chemical industry. Background Art

[0002] In the analytical gas desulfurization device during the production process of coal chemical industry, there is an unorganized emission phenomenon of VOC gas (organic compounds that can volatilize into the air) during the production process. With the increasingly stringent environmental protection pressure, it is necessary to recover and treat the VOC gas emitted from the desulfurization device in an unorganized manner.

[0003] However, when recovering and treating VOC gas, there are liquid impurities in the production mixed in the VOC gas. It is necessary to separate the impurities mixed in the VOC gas discharged from the gas desulfurization device in coal chemical production to improve the efficiency of VOC gas recovery and treatment. A device for recovering and treating VOC gas during the desulfurization process of coal chemical industry that can separate the impurities mixed in the VOC gas is required.

[0004] In view of this, the utility model provides a device for recovering and treating VOC gas during the desulfurization process of coal chemical industry. Summary of the Utility Model

[0005] The purpose of the utility model is to solve the above-mentioned drawbacks and provide a device for recovering and treating VOC gas during the desulfurization process of coal chemical industry that can separate the impurities mixed in the VOC gas.

[0006] The liquid-gas filtration and separation of VOC gas is initially carried out using a liquid-gas separator, and at the same time, the gas-liquid separation of VOC gas is carried out again through a gas-liquid separator.

[0007] Therefore, the utility model provides a device for recovering and treating VOC gas during the desulfurization process of coal chemical industry, including a regeneration tank and a lean liquid tank that discharge VOC gas. A conveying pipeline for the discharged VOC gas is installed at the top of the regeneration tank and the lean liquid tank. The other end of the conveying pipeline is installed with a liquid-gas separator for initially separating the liquid mixed inside the VOC gas. The outer surface of the liquid-gas separator is connected through a pipeline to a draft fan for conveying the VOC gas inside the conveying pipeline. The outer surface of the draft fan is installed with a gas-liquid separation component for separating the VOC gas again through a pipeline.

[0008] As a further improvement of this technical solution, the outer surface of the liquid-gas separator is installed with an air outlet connected to the inside of the draft fan and an air inlet connected to the conveying pipeline through a pipeline. A filter plate for separating the liquid mixed inside the VOC gas is installed on one side of the liquid-gas separator close to the air outlet.

[0009] As a further improvement of the technical solution, a liquid outlet is installed at the bottom of the outer surface of the liquid collector. The VOC gas entering the liquid collector passes through the filter plate, and the gas flows out through the air outlet after passing through the filter plate, while the liquid is blocked and collected at the bottom of the inner wall of the liquid collector.

[0010] As a further improvement of the technical solution, the gas-liquid separation component includes a gas-liquid separator. An inlet and an outlet for the entry and exit of VOC gas are installed on the outer surface of the gas-liquid separator. A U-shaped pipe for the outflow of gas is fixedly installed at the bottom of the outlet inside the gas-liquid separator, and a liquid discharge port for the outflow of the liquid separated from the VOC gas is installed at the bottom of the gas-liquid separator.

[0011] As a further improvement of the technical solution, the pipeline connected to the outer surface of the induced draft fan is installed inside the inlet, and the inlet allows the transported VOC gas to flow into the gas-liquid separator.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0013] 1. In the device for recovering and treating VOC gas in the coal chemical desulfurization process, when recovering and treating the discharged VOC gas, the induced draft fan can quickly circulate and transport the VOC gas discharged from the regeneration tank and the lean liquid tank in the conveying pipeline, so that the VOC gas is transported to the inside of the liquid collector through the air inlet connected to the conveying pipeline. The high flow rate of the VOC gas enables the gas to flow out of the liquid collector through the air outlet behind the filter plate when the VOC gas passes through the filter plate. The liquid impurities are filtered and impact the filter plate and flow down and accumulate on the surface and then into the liquid collector, and are regularly discharged through the liquid outlet at the bottom of the liquid collector, achieving the effect of initially filtering and separating the liquid impurities mixed in the VOC gas.

[0014] 2. In the device for recovering and treating VOC gas in the coal chemical desulfurization process, the induced draft fan then transports the VOC gas that has been preliminarily separated into gas and liquid by the liquid collector to the gas-liquid separator through the pipeline connected to the inlet. The nozzle of the U-shaped pipe installed at the outlet inside the gas-liquid separator is opened at the top inside the gas-liquid separator. The liquid impurities in the VOC gas will precipitate to the bottom of the gas-liquid separator and are regularly discharged through the liquid discharge port at the bottom. The gas accumulates inside the gas-liquid separator, and when the gas accumulates to the nozzle of the U-shaped pipe, it flows out through the outlet connected to the U-shaped pipe, achieving the effect of re-filtering and separating the gas and liquid in the VOC gas, and separating the liquid impurities in the gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Next, with reference to the drawings, the present utility model will be described in more detail by way of example. In the drawings:

[0016] Figure 1 is the front view plane schematic diagram of the present utility model;

[0017] Figure 2 Schematic diagram of the liquid collector structure of the present utility model;

[0018] Figure 3 Schematic diagram of the gas-liquid separator structure of the present utility model.

[0019] The meanings of each label in the figure are as follows:

[0020] 1. Regeneration tank; 2. Lean liquid tank; 3. Delivery pipeline;

[0021] 4. Liquid collector; 401. Gas outlet; 402. Gas inlet; 403. Filter plate; 404. Liquid outlet;

[0022] 5. Induced draft fan;

[0023] 6. Gas-liquid separation component; 601. Gas-liquid separator; 602. Inlet; 603. Outlet; 604. U-shaped pipe; 605. Liquid discharge port. Specific implementation mode

[0024] When recovering and treating VOC gases, there are liquid impurities in the production mixed in the VOC gases. It is necessary to separate the impurities mixed in the VOC gases discharged from the gas desulfurization device in coal chemical production to improve the efficiency of VOC gas recovery and treatment. A device for recovering and treating VOC gases in the coal chemical desulfurization process that can separate the impurities mixed in the VOC gases is required.

[0025] As Figure 1-2 shown, the device includes a regeneration tank 1 and a lean liquid tank 2 that discharge VOC gases. A delivery pipeline 3 for the flow of the discharged VOC gases is installed at the tops of the regeneration tank 1 and the lean liquid tank 2. The other end of the delivery pipeline 3 is installed with a liquid collector 4 for initially separating the liquid mixed in the VOC gases. The outer surface of the liquid collector 4 is connected by a pipeline to an induced draft fan 5 for delivering the VOC gases in the delivery pipeline 3. The outer surface of the induced draft fan 5 is installed with a gas-liquid separation component 6 for separating the VOC gases again through a pipeline;

[0026] First, the specific structure of the liquid collector 4 is disclosed. The outer surface of the liquid collector 4 is installed with a gas outlet 401 connected to the inside of the induced draft fan 5 through a pipeline and a gas inlet 402 connected to the delivery pipeline 3. A filter plate 403 for separating the liquid mixed in the VOC gases is installed on one side of the inside of the liquid collector 4 close to the gas outlet 401. A liquid outlet 404 is installed at the bottom of the outer surface of the liquid collector 4. The VOC gases entering the inside of the liquid collector 4 pass through the filter plate 403, and the gases flow out through the gas outlet 401 after passing through the filter plate 403, and the liquid is blocked and collected at the bottom of the inner wall of the liquid collector 4.

[0027] The improvement of this embodiment lies in that: through the induced draft fan 5, the VOC gas discharged from the regeneration tank 1 and the lean liquid tank 2 can be quickly circulated and transported in the conveying pipeline 3, and the VOC gas is transported to the inside of the liquid collector 4 through the air inlet 402 connected by the conveying pipeline 3. The VOC gas has a fast flow rate. When the VOC gas passes through the filter plate 403, the gas flows out of the liquid collector 4 through the air outlet 401 behind the filter plate 403. The liquid sundries are filtered and impact the filter plate 403 and flow down and accumulate on the surface to the inside of the liquid collector 4, and are regularly discharged through the liquid outlet 404 at the bottom of the liquid collector 4, achieving the effect of initially filtering and separating the liquid sundries mixed in the VOC gas.

[0028] Since the primary filtration and separation in the prior art cannot well separate the gas and liquid in the VOC gas, therefore, through Figure 1 and Figure 3 The second embodiment of the present invention is shown.

[0029] The specific structure of the gas-liquid separation component 6 is disclosed again. The gas-liquid separation component 6 includes a gas-liquid separator 601. An inlet 602 and an outlet 603 for the entry and exit of the VOC gas are installed on the outer surface of the gas-liquid separator 601. A U-shaped pipe 604 for the outflow of the gas is fixedly installed at the bottom of the outlet 603 inside the gas-liquid separator 601. A liquid discharge port 605 for the outflow of the liquid separated from the VOC gas is installed at the bottom of the gas-liquid separator 601. The pipeline connected to the outer surface of the induced draft fan 5 is installed inside the inlet 602, and the inlet 602 allows the transported VOC gas to flow into the inside of the gas-liquid separator 601.

[0030] The improvement of this embodiment lies in that: the induced draft fan 5 transports the VOC gas through the pipeline to the inlet 602 of the gas-liquid separator 601, so that the VOC gas enters the inside of the gas-liquid separator 601. The pipe orifice of the U-shaped pipe 604 installed at the outlet 603 inside the gas-liquid separator 601 is opened at the top inside the gas-liquid separator 601. The liquid sundries in the VOC gas will precipitate to the bottom of the gas-liquid separator 601 and are regularly discharged through the liquid discharge port 605 at the bottom. The gas accumulates inside the gas-liquid separator 601. When the gas accumulates to the pipe orifice of the U-shaped pipe 604, it flows out through the outlet 603 connected by the U-shaped pipe 604, achieving the effect of re-filtering and gas-liquid separation of the VOC gas and separating the liquid sundries in the gas.

[0031] In summary, the working principle of this solution is as follows:

[0032] When recovering and treating the discharged VOC gas, the induced draft fan 5 can enable the VOC gas discharged from the regeneration tank 1 and the lean liquid tank 2 to quickly flow and be conveyed in the conveying pipeline 3, and the VOC gas is conveyed to the inside of the liquid collector 4 through the air inlet 402 connected by the conveying pipeline 3. The fast flow rate of the VOC gas enables the gas to flow out of the liquid collector 4 through the air outlet 401 behind the filter plate 403 when the VOC gas passes through the filter plate 403. The liquid sundries in the VOC gas are filtered and impact the filter plate 403 and flow down and accumulate on the surface inside the liquid collector 4, and are regularly discharged through the liquid outlet 404 at the bottom of the liquid collector 4, achieving the effect of initially filtering and separating the liquid sundries mixed in the VOC gas;

[0033] The induced draft fan 5 then conveys the VOC gas with initially separated gas and liquid through the liquid collector 4 to the inside of the gas-liquid separator 601 through the pipeline connection inlet 602. The pipe orifice of the U-shaped pipe 604 installed at the outlet 603 inside the gas-liquid separator 601 is opened at the inner top of the gas-liquid separator 601. The liquid sundries in the VOC gas will precipitate to the bottom of the gas-liquid separator 601 and are regularly discharged through the liquid discharge port 605 at the bottom. The gas accumulates inside the gas-liquid separator 601. When the gas accumulates to the pipe orifice of the U-shaped pipe 604, it flows out through the outlet 603 connected by the U-shaped pipe 604, achieving the effect of re-filtering and separating the gas and liquid of the VOC gas, and separating the liquid sundries in the gas.

[0034] The above shows and describes the basic principle, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only preferred examples of the present invention and do not limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. An apparatus for recovering and treating VOC gas in the desulfurization process of coal chemical industry, comprising a regeneration tank (1) and a lean liquid tank (2) for discharging VOC gas, characterized in that: A delivery pipeline (3) for the circulation of discharged VOC gas is installed at the top of the regeneration tank (1) and the lean liquid tank (2). The other end of the delivery pipeline (3) is installed with a liquid collector (4) for the preliminary separation of the liquid mixed inside the VOC gas. The outer surface of the liquid collector (4) is connected by a pipeline to a draft fan (5) for the delivery of the VOC gas inside the delivery pipeline (3). The outer surface of the draft fan (5) is installed with a gas-liquid separation component (6) for the secondary separation of the VOC gas through a pipeline.

2. The device for recovering and treating VOC gas in the coal chemical desulfurization process according to claim 1, characterized in that: An air outlet (401) connected to the inside of the draft fan (5) through a pipeline and an air inlet (402) connected to the delivery pipeline (3) are installed on the outer surface of the liquid collector (4). A filter plate (403) for separating the liquid mixed inside the VOC gas is installed on one side of the inside of the liquid collector (4) close to the air outlet (401).

3. The device for recovering and treating VOC gas in the coal chemical desulfurization process according to claim 2, characterized in that: A liquid outlet (404) is installed at the bottom of the outer surface of the liquid collector (4). The VOC gas entering the inside of the liquid collector (4) passes through the filter plate (403), and the gas flows out through the air outlet (401) after passing through the filter plate (403), while the liquid is blocked and collected at the bottom of the inner wall of the liquid collector (4).

4. The device for recovering and treating VOC gas in the coal chemical desulfurization process according to claim 1, characterized in that: The gas-liquid separation component (6) includes a gas-liquid separator (601). An inlet (602) and an outlet (603) for the entry and exit of the VOC gas are installed on the outer surface of the gas-liquid separator (601). A U-shaped pipe (604) for the outflow of the gas is fixedly installed at the bottom of the outlet (603) inside the gas-liquid separator (601). A liquid discharge port (605) for the outflow of the liquid separated from the VOC gas is installed at the bottom of the gas-liquid separator (601).

5. The device for recovering and treating VOC gas in the coal chemical desulfurization process according to claim 4, characterized in that: The pipeline connected to the outer surface of the draft fan (5) is installed inside the inlet (602), and the inlet (602) allows the transported VOC gas to flow into the inside of the gas-liquid separator (601).

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