CN1245238C - Dust removal technique in use for natural gas and implementing equipment combination - Google Patents
Dust removal technique in use for natural gas and implementing equipment combination Download PDFInfo
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- CN1245238C CN1245238C CN 200410022231 CN200410022231A CN1245238C CN 1245238 C CN1245238 C CN 1245238C CN 200410022231 CN200410022231 CN 200410022231 CN 200410022231 A CN200410022231 A CN 200410022231A CN 1245238 C CN1245238 C CN 1245238C
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- natural gas
- solvent
- filter
- desulphurization
- water
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Abstract
The present invention relates to a dust removal technology for natural gas and equipment combination for realizing the technology. The technology directly utilizes desulphurization solvent in a natural gas desulphurization system; through spraying operation of a nozzle, the desulphurization solvent enters a natural gas pipe to be mixed with natural gas; an obtained mixture enters a water bath chamber; after the mixture is washed by water, clean gas is supplied for desulphurization processing; after the desulphurization solvent is filtered, the desulphurization solvent enters a traditional natural gas desulphurization system for flash evaporation and regeneration processing, and the cyclic utilization of the desulphurization solvent is realized. The equipment combination comprises a one-grade regulating valve, the nozzle, the water bath chamber, a second-grade regulating valve and a filtering system. A branch line is led out of a desulphurization solvent pipeline of the traditional natural gas desulphurization system by the one-grade regulating valve. An output pipeline of the filtering system is connected with the traditional natural gas desulphurization system and is connected with the inner parts of a flash evaporation tank and a regeneration tower. The present invention is organically combined with the traditional natural gas desulphurization technology, equipment can be used in a matching mode, the dust removal efficiency is high, a regeneration recovery device of traditional natural gas desulphurization equipment is effectively utilized, the environmental pollution is avoided, and the operating cost is not increased.
Description
Technical field
The present invention relates to remove in the selexol process system a kind of method of dust in the raw natural gas, relate to a covering device of realizing this method simultaneously, it can be widely used in the dedusting of senior middle school's low-pressure gas.
Background technology
At present selexol process factory removes that the method for dust is to adopt dry filter in the raw natural gas, and this filter method is better to the dust-filtering effect more than the 5 μ m, to particularly the dust-filtering effect below the 1 μ m is relatively poor below the 5 μ m.After these small dust enter next step desulfurizer, easily stop up downspout, column plate, float valve, the poor rich liquid heat exchanger of desulfuration absorbing tower, pollute desulfurization solvent, cause the solvent foaming, greatly reduce the production capacity of process units.The dedusting of the wet scrubber of employing is also arranged in addition, and the liquid of giving a dinner of welcome of use is water, and water can absorb a large amount of H
2S, CO
2Deng sour gas, if directly discharging can pollute, if handle the increase that the back discharging can bring operating cost again.
Summary of the invention
The objective of the invention is to deficiency at existing natural gas dedusting technology existence, a kind of new natural gas dust collection method and the device of realizing this method are provided, use with the traditional combination of selexol process technology, coordinative composition of equipments, remove small dust effectively, improve the production capacity of follow-up desulphurization plant, prolong equipment overhaul cycle, and effectively utilize the regeneration retracting device of traditional selexol process equipment, both avoid contaminated environment, do not increased operating cost again.
Technical scheme of the present invention is as follows:
The natural gas dust collection method, step comprises:
(1) adopts desulfurization solvent, behind the nozzle spray, enter in the natural gas tube;
(2) desulfurization solvent of spray state is with after natural gas mixes in pipe, enter the water-bath chamber, after the indoor desulfurization solvent water-bath of natural gas via, the filter separator that clean gas enters traditional selexol process system from top, water-bath chamber by appendix separates, catches foam to be handled, and enters the absorption tower again;
(1) bathing the desulfurization solvent of natural gas be transported to filter by bottom, water-bath chamber through pipeline and remove Chalk-dust filtering; Filtering needs through the essence filter that can filter the above dust of 0.1 μ m and two filter processes of coarse filtration that can filter the above dust of 1 μ m;
(3) desulfurization solvent after filtering enters in the flash tank of traditional selexol process system again, the fuel gas flash distillations such as methane that absorb in the solvent are come out, and then solvent is delivered to that regenerator is regenerated as can recycling again desulfurization solvent.
Above-mentioned desulfurization solvent is selected for use: one of methyl diethanolamine, MEA, diethanol amine, diisopropanolamine (DIPA), diglycolamine.
Wherein the filtration of carrying out in the step (3) need be through smart filter and two filter processes of coarse filtration.
The present invention has designed the device of realizing said method simultaneously, this device is to be made of each working cell that is installed in successively on the branch road of drawing from the desulfurization solvent pipeline of traditional selexol process system, comprise one-level control valve, flowmeter, nozzle, water-bath chamber, secondary control valve and and by the coarse filter that can filter the above dust of 1 μ m with can filter the filtration system that the accurate filter of the dust more than the 0.1 μ m combines successively, the output pipe of filtration system takes back traditional selexol process system again, tap into flash tank, insert regenerator at last.
Wherein filtration system is combined successively by coarse filter and accurate filter, is installed in parallel two covers, after a cover uses a period of time, when pressure reduction surpasses design load, carries out backwash or changes Filter column, switches to another set of operation simultaneously.Coarse filter and accurate filter structure are identical, just the hole difference of the Filter column that adopts.
The process of dedusting of the present invention:
After desulfurization solvent entered in the natural gas tube by nozzle in the mode of spray, the dust in the natural gas contact with vaporific solvent, acts on because profit is sticking, and was agglomerated together, and the diameter increase enters the water-bath chamber then, carry out water-bath after, dust settling is in solvent.The high pressure solvent that has absorbed dust in the water-bath chamber removes the granule dust in desolvating by thick, accurate filter after the step-down of secondary control valve, after the solvent flash distillation in traditional selexol process technology again, the regeneration, just can be recycled.
Advantage of the present invention is:
1, adopted the wet dust removal filtration, by processes such as spray, water-baths, can remove small dust in the natural gas effectively, dust removing effects is fabulous.
2, directly utilized the desulfurization solvent in traditional selexol process technology to carry out dedusting, its reclaiming directly utilizes the device in traditional selexol process equipment to carry out reclaiming again, the combination of realization and sulfur removal technology, the efficient utilization of equipment, operating cost is low.
3, adopted thick, the smart combining form of filtering in technology, coarse filtration can filter out the above dust of 1um, carries out smart filtration again and can filter out the above dust of 0.1 μ m, filtering accuracy height.
Description of drawings
Fig. 1 is this natural gas cleaner combination and the schematic diagram that combines of traditional selexol process device systems.
The specific embodiment
Referring to Fig. 1, solid line partly is the signal of this natural gas cleaner combination among the figure, include one-level control valve, flowmeter, nozzle, water-bath chamber, secondary control valve and filtration system, dotted line is the signal of traditional selexol process device systems, include filter separator, absorption tower, control valve etc., the part of dotted line be they in conjunction with shared device, comprise flash tank, regenerator and pump etc.The syntagmatic of this natural gas cleaner combination: the one-level control valve is installed on the branch road of drawing from the desulfurization solvent pipeline of traditional selexol process system, and flowmeter is installed simultaneously, controls the flow that solvent enters the gas water bathroom together.Connect nozzle after the one-level control valve, nozzle links to each other with the natural gas tube entrance point.The natural gas tube port of export links to each other with the water-bath pipe of water-bath chamber, the liquid level of water-bath chamber is controlled at 30%-50%, it is following (according to actual needs that the water-bath pipe stretches into the desulfurization solvent liquid level, the water-bath pipe also can not put in the desulfurization solvent liquid level), clean letter shoot is drawn on top, water-bath chamber, the filter separator that inserts traditional selexol process equipment carries out isolated by filtration, catches the foam processing, enters the absorption tower again.The desulfurization solvent efferent duct is drawn in bottom, water-bath chamber, and the secondary control valve is set.The desulfurization solvent efferent duct connects the coarse filter import, and the coarse filter outlet links to each other with the accurate filter import, and the accurate filter efferent duct taps into the flash tank of traditional selexol process equipment, connects regenerator then.Slightly, accurate filter can be according to the Filter column of the different choice different aperture of dust size size in the solvent.
Its technology implementation procedure: from the desulfurization solvent that advances desulfuration absorbing tower (before not carrying out desulfurization, claim lean solution in the industry again) in a part of methyl diethanolamine solvent of drawing control through the one-level control valve, behind the nozzle spray, enter in the natural gas tube, process is mixed laggard entry bathroom in pipeline, dust is deposited in the solvent after water-bath, after the natural gas via water-bath, become clean gas, export from top, water-bath chamber, desulfurization solvent keeps certain liquid level in the water-bath chamber, the water-bath pipe is immersed in the desulfurization solvent, dust in the natural gas is fully contacted with solvent be convenient to sedimentation, and keeping certain liquid level on the other hand is to prevent that high-pressure natural gas from sealing in the low-pressure system.The desulfurization solvent outlet pressure after desulfurization solvent (being called rich solution this moment in industry) enters filtration system filters, is carrying out flash distillation and regeneration successively after step-down under the effect of secondary control valve, the desulfurization solvent after the regeneration (being lean solution) can be recycled again.
Claims (2)
1, natural gas dust collection method, its step comprises:
(1) adopts desulfurization solvent, behind the nozzle spray, enter in the natural gas tube;
(2) desulfurization solvent of spray state is with after natural gas mixes in pipe, enter the water-bath chamber, after the indoor desulfurization solvent water-bath of natural gas via, the filter separator that clean gas enters traditional selexol process system from top, water-bath chamber by appendix separates, catches foam to be handled, and enters the absorption tower again;
(3) bathing the desulfurization solvent of natural gas be transported to filter by bottom, water-bath chamber through pipeline and remove Chalk-dust filtering, filtering needs through the essence filter that can filter the above dust of 0.1 μ m and two filter processes of coarse filtration that can filter the above dust of 1 μ m;
(4) desulfurization solvent after filtering enters in the flash tank of traditional selexol process system again, the fuel gas flash distillations such as methane that absorb in the solvent are come out, and then solvent is delivered to that regenerator is regenerated as can recycling again desulfurization solvent;
Above-mentioned desulfurization solvent is selected for use: one of methyl diethanolamine, MEA, diethanol amine, diisopropanolamine (DIPA), diglycolamine.
2, realize the device of the described method of claim 1, it is characterized in that: this device is to be made of each working cell that is installed in successively on the branch road of drawing from the desulfurization solvent pipeline of traditional selexol process system, comprise one-level control valve, nozzle, water-bath chamber, secondary control valve and by the coarse filter that can filter the above dust of 1 μ m with can filter the filtration system that the accurate filter of the dust more than the 0.1 μ m combines successively, the output pipe of filtration system takes back traditional selexol process system again, tap into flash tank, insert regenerator at last.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410022231 CN1245238C (en) | 2004-04-04 | 2004-04-04 | Dust removal technique in use for natural gas and implementing equipment combination |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410022231 CN1245238C (en) | 2004-04-04 | 2004-04-04 | Dust removal technique in use for natural gas and implementing equipment combination |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1563293A CN1563293A (en) | 2005-01-12 |
| CN1245238C true CN1245238C (en) | 2006-03-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410022231 Expired - Fee Related CN1245238C (en) | 2004-04-04 | 2004-04-04 | Dust removal technique in use for natural gas and implementing equipment combination |
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| CN (1) | CN1245238C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100415856C (en) * | 2006-04-30 | 2008-09-03 | 西南石油大学 | Desulfurization dewatering purifying equipment for natural gas |
| CN104119976B (en) * | 2014-07-27 | 2016-08-17 | 成都国光电子仪表有限责任公司 | Natural gas filter |
| CN104117258A (en) * | 2014-07-27 | 2014-10-29 | 成都国光电子仪表有限责任公司 | Spraying type natural gas filter |
| CN105969440A (en) * | 2016-06-29 | 2016-09-28 | 长春汽车燃气发展有限公司 | Natural gas desulfurization device with desulfurizer regeneration function |
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2004
- 2004-04-04 CN CN 200410022231 patent/CN1245238C/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| CN1563293A (en) | 2005-01-12 |
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Granted publication date: 20060315 Termination date: 20100404 |