CN112588085A - Tail gas treatment device and method for methanol storage tank - Google Patents
Tail gas treatment device and method for methanol storage tank Download PDFInfo
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- CN112588085A CN112588085A CN202011122007.2A CN202011122007A CN112588085A CN 112588085 A CN112588085 A CN 112588085A CN 202011122007 A CN202011122007 A CN 202011122007A CN 112588085 A CN112588085 A CN 112588085A
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- pipeline
- methanol
- water washing
- storage tank
- water
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
- B01D2257/708—Volatile organic compounds V.O.C.'s
Abstract
The invention discloses a tail gas treatment device for a methanol storage tank and a treatment method thereof, the device is arranged at the top of the methanol storage tank and is connected with the top of the methanol storage tank and a breather valve arranged on the top of the methanol storage tank through a three-way valve, the device comprises a water washing device, a torch pipeline, a desalted water pipeline, a nitrogen pipeline and a crude methanol tank pipeline, wherein, the output end of the methanol storage tank separated by the three-way valve is connected with the input end of the water washing device and is provided with a branch connected with the input end of the nitrogen pipeline, the other input end of the water washing device is connected with the desalination water pipeline, the water washing device is respectively provided with two output ends connected with the crude methanol tank pipeline and the torch pipeline, and the two output ends are connected with the crude methanol tank pipeline and the torch pipeline, and by adopting the technical scheme, the organic gas in the methanol waste gas is recovered, the atmospheric pollution is reduced, and the production cost is saved.
Description
Technical Field
The invention belongs to the field of methanol tail gas treatment, and particularly relates to a tail gas treatment device and method for a methanol storage tank.
Background
In the methanol production process, volatile gases (main components are CH3OH, CH3OCH3, CH3CH2OH, CH3COOH and the like) generated by the liquid level rise and the temperature difference between day and night of the methanol internal floating roof storage tank are directly discharged into the atmospheric environment through on-site high-point emptying, so that the methanol product is wasted, the atmospheric environment is polluted, a large amount of organic gases can seriously pollute the environment, and in the prior art, degradation gases are mostly input in the discharge process, so that the methanol waste can be caused, and the production cost is not favorably saved.
Disclosure of Invention
The invention aims to provide a tail gas treatment device for recovering methanol and used for a methanol storage tank and a method thereof.
In order to achieve the purpose, the invention adopts the technical scheme that:
the utility model provides a tail gas processing apparatus for methyl alcohol piggy bank, the device sets up at the top of methyl alcohol piggy bank and links to each other with methyl alcohol piggy bank top and the breather valve that is equipped with through the three-way valve in the device, including the water washing device in the device, the torch pipeline, the desalination pipeline, nitrogen gas pipeline and thick methyl alcohol groove pipeline, wherein, the methyl alcohol piggy bank links to each other and is provided with the branch road of connecting in nitrogen gas pipeline input with the input of water washing device through the output of three-way valve separation, another input that the water washing device set up links to each other with the desalination pipeline, the water washing device is provided with respectively and corresponds to two outputs that thick methyl alcohol groove pipeline and torch pipeline link to each other, and link to each other with thick methyl.
The invention discloses a tail gas treatment device for a methanol storage tank, wherein a flame arrester and a first self-operated valve are arranged between a water washing device and a pipeline connected with the output end of the methanol storage tank, a branch connected with a nitrogen pipeline is branched between the connection of a control valve and the self-operated valve, and the branch also comprises a plurality of valves.
The invention discloses a tail gas treatment device for a methanol storage tank, wherein a branch comprises a first control valve, a second self-operated valve, a third self-operated valve and a second control valve which are connected in series, and the branch is connected in series with the input end of a nitrogen pipeline.
The invention discloses a tail gas treatment device for a methanol storage tank, wherein a third control valve, a pressure pump and a fourth control valve are further arranged between the output end of a water washing tower and a crude methanol tank pipeline, and the pressure pumps are arranged between the two control valves and are mutually connected in series in a tail-ending manner between the output end of the water washing tower and the crude methanol tank pipeline.
The invention discloses a tail gas treatment device for a methanol storage tank.
The invention discloses a tail gas treatment method for a methanol storage tank, which further comprises the following steps:
s1, emptying the volatile organic gas generated in the methanol storage tank into the device through the breather valve in the state that the corresponding control valves of the nitrogen pipeline and the desalination water pipeline in the device are opened;
and S2, enabling the methanol to enter from the bottom of the water washing device to be in contact with desalted water introduced into the desalted water pipeline from the upper part of the water washing device, recovering methanol in volatile gas generated in a methanol storage tank, pumping the methanol to a crude methanol tank pipeline through a pressure pump, and discharging non-condensable gas output by the water washing device to a torch pipeline.
In the step S1, the first self-operated valve, the second self-operated valve and the third self-operated valve need to be opened so as to open a pipeline connecting the methanol storage tank and the water washing device and a branch corresponding to a nitrogen pipeline.
The invention discloses a tail gas treatment method for a methanol storage tank.
Adopt this technical scheme, through increase control flap, the torch pipeline before methanol storage tank top breather valve, the desalination water pipeline, nitrogen gas pipeline and thick methyl alcohol groove pipeline and washing unit, volatile organic gas that produces the methyl alcohol storage tank leads to methyl alcohol internal floating roof storage tank methyl alcohol recovery unit by on-the-spot unloading, according to the characteristics of the easy water of methyl alcohol, volatile organic gas gets into the demineralized water contact who lets in with the upper portion from the washing unit bottom, the methyl alcohol among the recovery organic gas etc. then, deliver to thick methyl alcohol groove through the pump, the partial insoluble in water gas after the methyl alcohol is retrieved discharges to the torch system, reduce gaseous pollution atmospheric environment.
The invention will be explained in more detail below with reference to the drawings and examples.
Drawings
The contents of the description and the references in the drawings are briefly described as follows:
FIG. 1 is a schematic view of the structure of the tail gas treatment device of the present invention.
Labeled as: 1. a methanol storage tank; 2. a nitrogen line; 3. a crude methanol tank line; 4. a desalted water line; 5. a flare line; 6. a water washing device; 7. a pressure pump; 8. a flame arrestor; 9. a control valve; 10. a second control valve; 11. a third control valve; 12. a fourth control valve; 13. a fifth control valve; 14. a sixth control valve; 15. a first self-operated valve; 16. a second self-operated valve; 17. and a third self-operated valve.
Detailed Description
The following description of the embodiments of the present invention, with reference to the accompanying drawings, will be made in further detail for the purpose of providing a more complete, accurate and thorough understanding of the inventive concepts and technical solutions of the present invention, including the shapes of the components, the structures, the mutual positions and connection relationships of the components, the functions and operating principles of the components, the manufacturing processes, the operation and use methods, and the like.
FIG. 1 is a schematic structural view of a tail gas treatment apparatus according to the present invention, which is a tail gas treatment apparatus for a methanol storage tank shown in FIG. 1, and which is disposed on the top of the methanol storage tank 1 and connected to the top of the methanol storage tank and a breather valve disposed therein through a three-way valve, and which includes a water washing apparatus 6, a flare pipeline 5, a desalination water pipeline 4, a nitrogen pipeline 2 and a crude methanol tank pipeline 3, wherein an output end of the methanol storage tank separated by the three-way valve is connected to an input end of the water washing apparatus and is provided with a branch connected to an input end of the nitrogen pipeline, another input end of the water washing apparatus is connected to the desalination water pipeline, the water washing apparatus is respectively provided with two output ends corresponding to the connection of the crude methanol tank pipeline and the flare pipeline and is connected to the crude methanol tank pipeline and the flare pipeline through the two output ends, a flame arrester 8 and a first self-acting valve 15 are disposed between the pipelines connected to, divide between control valve 9 and the self-operated valve link to each other shunt with the branch road that the nitrogen gas pipeline links to each other still includes a plurality of valves in this branch road, including first control valve 10, second self-operated valve 16, third self-operated valve 17 and the second control valve 11 of establishing ties in the branch road, and establish ties in the input of nitrogen gas pipeline, the output of washing tower with still be provided with third control valve 12, force pump 7 and fourth control valve 13 between the thick methyl alcohol groove pipeline, the force pump setting is just closed each other and is established ties between the output of washing tower and thick methyl alcohol groove pipeline between two control valves, is provided with fifth control valve 14 between the input of desalination water pipeline and washing device.
The scheme discloses a tail gas treatment method for a methanol storage tank, which further comprises the following steps:
s1, emptying the volatile organic gas generated in the methanol storage tank into the device through the breather valve in the state that the corresponding control valves of the nitrogen pipeline and the desalination water pipeline in the device are opened;
and S2, enabling the methanol to enter from the bottom of the water washing device to be in contact with desalted water introduced into the desalted water pipeline from the upper part of the water washing device, recovering methanol in volatile gas generated in a methanol storage tank, pumping the methanol to a crude methanol tank pipeline through a pressure pump, and discharging non-condensable gas output by the water washing device to a torch pipeline.
In the above step S1, the first, second and third self-operated valves need to be opened to open the pipeline connecting the methanol storage tank and the water washing device and the corresponding branch of the nitrogen gas pipeline.
The washing device of the scheme adopts a spray-type washing tower, and the top of the washing tower is provided with an input end connected with the desalination water pipeline.
Adopt this technical scheme, through increase control flap, the torch pipeline before methanol storage tank top breather valve, the desalination water pipeline, nitrogen gas pipeline and thick methyl alcohol groove pipeline and washing unit, volatile organic gas that produces the methyl alcohol storage tank leads to methyl alcohol internal floating roof storage tank methyl alcohol recovery unit by on-the-spot unloading, according to the characteristics of the easy water of methyl alcohol, volatile organic gas gets into the demineralized water contact who lets in with the upper portion from the washing unit bottom, the methyl alcohol among the recovery organic gas etc. then, deliver to thick methyl alcohol groove through the pump, the partial insoluble in water gas after the methyl alcohol is retrieved discharges to the torch system, reduce gaseous pollution atmospheric environment.
The invention has been described above with reference to the accompanying drawings, it is obvious that the invention is not limited to the specific implementation in the above-described manner, and it is within the scope of the invention to apply the inventive concept and solution to other applications without substantial modification.
Claims (8)
1. The utility model provides a tail gas processing apparatus for methyl alcohol savings tank, the device set up at the top of methyl alcohol savings tank and link to each other its characterized in that through three-way valve and methyl alcohol savings tank top and the breather valve that is equipped with: including the water washing device in the device, the torch pipeline, the desalination water pipeline, nitrogen gas pipeline and thick methyl alcohol groove pipeline, wherein, the output that the methyl alcohol piggy bank passes through the three-way valve separation links to each other with the input of water washing device and is provided with the branch road of connecting in nitrogen gas pipeline input, another input that the water washing device set up links to each other with the desalination water pipeline, the water washing device is provided with two outputs that link to each other corresponding to thick methyl alcohol groove pipeline and torch pipeline respectively, and links to each other with thick methyl alcohol groove pipeline and torch pipeline through these two outputs.
2. The tail gas treatment device for the methanol storage tank as claimed in claim 1, wherein a flame arrester and a first self-operated valve are provided between the pipes connected to the output end of the methanol storage tank, and a branch connected to the nitrogen gas line is branched between the connection of the control valve and the self-operated valve, and the branch further comprises a plurality of valves.
3. A tail gas treatment device for a methanol accumulator according to claim 2, wherein said branch comprises a first control valve, a second self-operated valve, a third self-operated valve and a second control valve connected in series and connected in series to the input end of said nitrogen line.
4. The apparatus as claimed in claim 1, wherein a third control valve, a pressure pump and a fourth control valve are further disposed between the output of the water washing tower and the crude methanol tank pipeline, and the pressure pump is disposed between the two control valves and connected in series with each other in a mutually ending manner between the output of the water washing apparatus and the crude methanol tank pipeline.
5. A tail gas treatment device for a methanol accumulator according to claim 1, wherein a fifth control valve is provided between the desalination water line and the input of the water washing device.
6. An off-gas treatment method for a methanol storage tank comprising the off-gas treatment device of any one of claims 1 to 5, characterized by further comprising the steps of:
s1, emptying the volatile organic gas generated in the methanol storage tank into the device through the breather valve in the state that the corresponding control valves of the nitrogen pipeline and the desalination water pipeline in the device are opened;
and S2, enabling the methanol to enter from the bottom of the water washing device to be in contact with desalted water introduced into the desalted water pipeline from the upper part of the water washing device, recovering methanol in volatile gas generated in a methanol storage tank, pumping the methanol to a crude methanol tank pipeline through a pressure pump, and discharging non-condensable gas output by the water washing device to a torch pipeline.
7. The method as claimed in claim 6, wherein the first, second and third self-operated valves are opened to open the pipeline connecting the methanol storage tank to the water washing means and the corresponding branch of the nitrogen gas pipeline in the step of S1.
8. A method for treating a tail gas for a methanol accumulator according to claim 6, wherein said water washing means is a shower-type water washing tower having an input terminal connected to said desalted water line at the top thereof.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202011122007.2A CN112588085A (en) | 2020-10-20 | 2020-10-20 | Tail gas treatment device and method for methanol storage tank |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011122007.2A CN112588085A (en) | 2020-10-20 | 2020-10-20 | Tail gas treatment device and method for methanol storage tank |
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| CN112588085A true CN112588085A (en) | 2021-04-02 |
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| CN202011122007.2A Pending CN112588085A (en) | 2020-10-20 | 2020-10-20 | Tail gas treatment device and method for methanol storage tank |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114534449A (en) * | 2022-01-11 | 2022-05-27 | 中国神华煤制油化工有限公司 | Recovery system for volatile gas in methanol tank |
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| EP3162426A1 (en) * | 2015-10-29 | 2017-05-03 | Ulrich Wagner | Method of reducing the emission of methanol |
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| Publication number | Priority date | Publication date | Assignee | Title |
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