Waste gas desublimation recycling system and method

Abstract

The invention relates to the technical field of waste gas treatment, in particular to a waste gas desublimation recycling system and method.The waste gas desublimation recycling system comprises a waste gas inlet pipe, a butterfly valve, a baffle valve, a first variable-diameter flange, a cold trap, a second variable-diameter flange, a filter, a VPS vacuum screw pump and a storage tank, waste gas is introduced into the butterfly valve through the waste gas inlet pipe, and then the waste gas is introduced into the baffle valve through the butterfly valve; the waste gas enters the cold trap after passing through the baffle valve, the waste gas with a high melting point is desublimated to be fixed and stored, and the waste gas with a low melting point enters the filter through the cold trap; the waste gas is subjected to drying and impurity removal treatment through the filter, the waste gas enters the VPS vacuum screw pump through a pipeline to be compressed after being filtered, and the compressed waste gas is guided into the storage tank through a pipeline to be subjected to unified and centralized treatment. And finally, the filtered waste gas is guided into the storage tank to be stored and subjected to centralized treatment, the waste gas cannot be directly discharged, and the environment quality can be effectively protected.

Description

Technical Field

[0001] The present invention relates to the technical field of waste gas treatment, and in particular to a waste gas condensation recovery and reuse system and method. Background Art

[0002] Industrial waste gas refers to the general term for various pollutant gases discharged into the air during fuel combustion and production processes within the factory area of ​​an enterprise. These waste gases include: carbon dioxide, carbon disulfide, hydrogen sulfide, fluoride, nitrogen oxides, chlorine, hydrogen chloride, carbon monoxide, sulfuric acid (mist), lead and mercury, beryllium, smoke and industrial dust.

[0003] Industrial waste gas is directly discharged into the atmosphere, which will cause environmental pollution. Summary of the invention

[0004] The purpose of the present invention is to provide a waste gas desublimation recovery and reuse system and method, aiming to solve the problem that the existing industrial waste gas is directly discharged into the atmosphere, which will cause pollution to the environment.

[0005] To achieve the above-mentioned objectives, in a first aspect, the present invention provides a waste gas condensation recovery and reuse system, comprising a waste gas inlet pipe, a butterfly valve, a baffle valve, a first reducing flange, a cold trap, a second reducing flange, a filter, a VPS vacuum screw pump and a storage tank; the butterfly valve is communicated with the waste gas inlet pipe and is located on one side of the waste gas inlet pipe, the baffle valve is fixedly connected to the butterfly valve and is located on the side of the butterfly valve away from the waste gas inlet pipe, the first reducing flange is communicated with the baffle valve and is located on the side of the baffle valve, the cold trap is fixedly connected to the first reducing flange and is located on the side of the first reducing flange away from the baffle valve, the second reducing flange is fixedly connected to the cold trap and is located on the side of the cold trap away from the first reducing flange, the filter is fixedly connected to the second reducing flange and is located on the side of the second reducing flange away from the cold trap, the VPS vacuum screw pump is communicated with the filter and is located on one side of the filter, and the storage tank is communicated with the VPS vacuum screw pump and is located on one side of the VPS vacuum screw pump.

[0006] In a second aspect, the present invention further provides a waste gas desublimation recovery and reuse method, which is applied to a waste gas desublimation recovery and reuse system as described in the first aspect above, and is characterized by comprising the following steps:

[0007] The waste gas generated during the production process is introduced into the butterfly valve through the waste gas inlet pipe, and the butterfly valve then guides the waste gas into the baffle valve;

[0008] The waste gas enters the cold trap after passing through the baffle valve, so that the waste gas with a high melting point is condensed and fixed and stored in the cold trap, while the waste gas with a low melting point enters the filter through the cold trap;

[0009] The filter dries and removes impurities from the waste gas flowing in. After being filtered, the waste gas enters the VPS vacuum screw pump through a pipeline for compression. After compression, the waste gas is introduced into a storage tank through a pipeline for unified and centralized treatment.

[0010] Wherein, the waste gas is gas, the system and the pipes used should be resistant to 、 Corrosion resistance and airtightness.

[0011] The butterfly valve then guides the exhaust gas into the baffle valve in a specific manner:

[0012] Adjust the butterfly valve switch to allow the exhaust gas to quantitatively pass through the butterfly valve and enter the baffle valve;

[0013] The baffle valve switch is turned on to allow the exhaust gas to enter the cold trap through the baffle valve.

[0014] The exhaust gas enters the cold trap after passing through the baffle valve, and the exhaust gas with a high melting point is condensed and fixed and stored in the cold trap, while the exhaust gas with a low melting point enters the filter through the cold trap, and further includes:

[0015] The cold trap maintains the desublimation temperature so that the waste gas can be fully desublimated. The waste gas is desublimated into solid and stored in the cold trap. After reaching the storage limit, the baffle valve is closed and the cold trap is removed to recover and store the substances inside.

[0016] The waste gas desublimation recycling system of the present invention, the waste gas generated in the production process is introduced into the butterfly valve through the waste gas inlet pipe, and the butterfly valve then guides the waste gas into the baffle valve; the waste gas enters the cold trap after passing through the baffle valve, and the waste gas with a high melting point is desublimated and fixed and stored in the cold trap, and the waste gas with a low melting point enters the filter through the cold trap; the filter dries and removes impurities on the waste gas flowing in, and the waste gas enters the VPS vacuum screw pump through a pipeline for compression after filtration, and the compressed waste gas is introduced into the storage tank through a pipeline for unified and centralized treatment. The system can The waste gas generated in the industrial production process is condensed and recovered in the cold trap, and then the uncondensed gas is filtered and removed by the filter, and finally the filtered waste gas is introduced into the storage tank for storage and centralized treatment (after a certain amount of waste gas is stored, the organic waste gas molecules are converted into various active particles through ion purification and other methods, which are combined with oxygen in the air to generate water, carbon dioxide and other low-molecular harmless substances, thereby achieving the purpose of purifying the waste gas). The waste gas will not be discharged directly, which can effectively protect the environmental quality and solve the problem of direct discharge of existing industrial waste gas into the atmosphere, which will cause pollution to the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a schematic diagram of a waste gas desublimation recovery and reuse system provided by the present invention.

[0019] Figure 2 The present invention provides a flow chart of a waste gas condensation recovery and reuse method.

[0020] Figure 3 It is a flow chart of the specific way in which the butterfly valve guides the exhaust gas into the baffle valve.

[0021] In the figure: 1-exhaust gas inlet pipe, 2-butterfly valve, 3-baffle valve, 4-first reducing flange, 5-cold trap, 6-second reducing flange, 7-filter, 8-VPS vacuum screw pump, 9-storage tank. DETAILED DESCRIPTION

[0022] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0023] See also Figure 1 In a first aspect, the present invention provides a waste gas desublimation recovery and reuse system, comprising a waste gas inlet pipe 1, a butterfly valve 2, a baffle valve 3, a first reducing flange 4, a cold trap 5, a second reducing flange 6, a filter 7, a VPS vacuum screw pump 8 and a storage tank 9;

[0024] The butterfly valve 2 is communicated with the exhaust gas inlet pipe 1 and is located on one side of the exhaust gas inlet pipe 1. The baffle valve 3 is fixedly connected with the butterfly valve 2 and is located on the side of the butterfly valve 2 away from the exhaust gas inlet pipe 1. The first reducing flange 4 is communicated with the baffle valve 3 and is located on one side of the baffle valve 3. The cold trap 5 is fixedly connected with the first reducing flange 4 and is located on the side of the first reducing flange 4 away from the baffle valve 3. The second reducing flange 6 is fixedly connected with the cold trap 5 and is located on the side of the cold trap 5 away from the first reducing flange 4. The filter 7 is fixedly connected with the second reducing flange 6 and is located on the side of the second reducing flange 6 away from the cold trap 5. The VPS vacuum screw pump 8 is communicated with the filter 7 and is located on one side of the filter 7. The storage tank 9 is communicated with the VPS vacuum screw pump 8 and is located on one side of the VPS vacuum screw pump 8.

[0025] In the embodiment of the present invention, the waste gas generated during the production process is introduced into the butterfly valve 2 through the waste gas inlet pipe 1, and the butterfly valve 2 then guides the waste gas into the baffle valve 3; the waste gas enters the cold trap 5 after passing through the baffle valve 3, so that the waste gas with a high melting point is condensed and fixed and stored in the cold trap 5, and the waste gas with a low melting point enters the filter 7 through the cold trap 5; the filter 7 dries and removes impurities on the waste gas flowing in, and the waste gas enters the VPS vacuum screw pump 8 through the pipeline for compression after filtration. The compressed waste gas is introduced into the storage tank 9 through the pipeline for unified and centralized treatment. The system can The waste gas generated in the industrial production process is condensed and recovered in the cold trap 5, and then the uncondensed waste gas is filtered and removed by the filter 7, and finally the filtered waste gas is introduced into the storage tank 9 for storage and centralized treatment (after a certain amount of waste gas is stored, the organic waste gas molecules are converted into various active particles through ion purification and other methods, which are combined with oxygen in the air to generate water, carbon dioxide and other low-molecular harmless substances, thereby achieving the purpose of purifying the waste gas). The waste gas will not be discharged directly, which can effectively protect the environmental quality and solve the problem that the existing industrial waste gas is directly discharged into the atmosphere, which will cause pollution to the environment.

[0026] See also Figure 2-Figure 3 In a second aspect, the present invention further provides a waste gas condensation recovery and reuse method, which is applied to a waste gas condensation recovery and reuse system as described in the first aspect above, and is characterized in that it comprises the following steps:

[0027] The waste gas generated during the production process of S1 is introduced into the butterfly valve 2 through the waste gas inlet pipe 1, and the butterfly valve 2 then guides the waste gas into the baffle valve 3;

[0028] In the embodiment of the present invention, the exhaust gas is flow-controlled by the butterfly valve 2 and the baffle valve 3 to ensure that the subsequent exhaust gas is fully condensed.

[0029] The specific method in which the butterfly valve 2 guides the exhaust gas into the baffle valve 3 is as follows:

[0030] S11 adjusts the switch of the butterfly valve 2 so that the exhaust gas passes through the butterfly valve 2 in a quantitative manner and enters the baffle valve 3;

[0031] S12 opens the damper valve 3 to allow the exhaust gas to enter the cold trap 5 through the damper valve 3 .

[0032] S2 waste gas enters the cold trap 5 after passing through the baffle valve 3, so that the waste gas with a high melting point is condensed and fixed and stored in the cold trap 5, and the waste gas with a low melting point enters the filter 7 through the cold trap 5;

[0033] In the embodiment of the present invention, the cold trap 5 is also included to maintain the desublimation temperature so that the exhaust gas can be fully desublimated. The exhaust gas is condensed into solid and stored in the cold trap 5. After the storage limit is reached, the baffle valve 3 is closed, and then the cold trap 5 is removed to recover and store the substances inside for subsequent reuse.

[0034] The filter 7 in S3 dries and removes impurities from the waste gas flowing in. After being filtered, the waste gas enters the VPS vacuum screw pump 8 through a pipeline for compression. After compression, the waste gas is introduced into the storage tank 9 through a pipeline for unified and centralized treatment.

[0035] In an embodiment of the present invention, the waste gas is compressed by the VPS vacuum screw pump 8 and then enters the storage tank 9 through a pipeline for storage. After a certain amount of waste gas is stored, the organic waste gas molecules are converted into various active particles through ion purification and other methods, and combined with oxygen in the air to generate low-molecular harmless substances such as water and carbon dioxide, thereby achieving the purpose of purifying the waste gas.

[0036] The above disclosure is only a preferred embodiment of the waste gas condensation recovery and reuse system and method of the present invention. Of course, this cannot be used to limit the scope of rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiments and equivalent changes made in accordance with the claims of the present invention are still within the scope of the invention.

Claims

1. A waste gas condensation recovery and reuse system, characterized in that: It includes an exhaust gas inlet pipe, a butterfly valve, a baffle valve, a first reducing flange, a cold trap, a second reducing flange, a filter, a VPS vacuum screw pump and a storage tank; The butterfly valve is communicated with the exhaust gas inlet pipe and is located on one side of the exhaust gas inlet pipe. The baffle valve is fixedly connected with the butterfly valve and is located on the side of the butterfly valve away from the exhaust gas inlet pipe. The first reducing flange is communicated with the baffle valve and is located on one side of the baffle valve. The cold trap is fixedly connected with the first reducing flange and is located on the side of the first reducing flange away from the baffle valve. The second reducing flange is fixedly connected with the cold trap and is located on the side of the cold trap away from the first reducing flange. The filter is fixedly connected with the second reducing flange and is located on the side of the second reducing flange away from the cold trap. The VPS vacuum screw pump is communicated with the filter and is located on one side of the filter. The storage tank is communicated with the VPS vacuum screw pump and is located on one side of the VPS vacuum screw pump.

2. A waste gas desublimation recovery and reuse method, applied to a waste gas desublimation recovery and reuse system as claimed in claim 1, characterized in that: The following steps are involved: The waste gas generated during the production process is introduced into the butterfly valve through the waste gas inlet pipe, and the butterfly valve then guides the waste gas into the baffle valve; The waste gas enters the cold trap after passing through the baffle valve, so that the waste gas with a high melting point is condensed and fixed and stored in the cold trap, while the waste gas with a low melting point enters the filter through the cold trap; The filter dries and removes impurities from the waste gas flowing in. After being filtered, the waste gas enters the VPS vacuum screw pump through a pipeline for compression. After compression, the waste gas is introduced into a storage tank through a pipeline for unified and centralized treatment.

3. A waste gas desublimation recovery and reuse method as claimed in claim 2, characterized in that: The waste gas is gas, and the system and the pipes used should be resistant to 、 Corrosion resistance and airtightness.

4. A waste gas desublimation recovery and reuse method as claimed in claim 2, characterized in that: The butterfly valve then guides the exhaust gas into the baffle valve in a specific manner: Adjust the butterfly valve switch to allow the exhaust gas to quantitatively pass through the butterfly valve and enter the baffle valve; The baffle valve switch is turned on to allow the exhaust gas to enter the cold trap through the baffle valve.

5. A waste gas desublimation recovery and reuse method as claimed in claim 2, characterized in that: The exhaust gas enters the cold trap after passing through the baffle valve, so that the exhaust gas with a high melting point is condensed and fixed and stored in the cold trap, and the exhaust gas with a low melting point enters the filter through the cold trap, and further includes: The cold trap maintains the desublimation temperature so that the waste gas can be fully desublimated. The waste gas is desublimated into solid and stored in the cold trap. After reaching the storage limit, the baffle valve is closed and the cold trap is removed to recover and store the substances inside.

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