CN106281520A - A kind of double-tower molecular sieve Gas Dehydration System - Google Patents
A kind of double-tower molecular sieve Gas Dehydration System Download PDFInfo
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- CN106281520A CN106281520A CN201510246058.9A CN201510246058A CN106281520A CN 106281520 A CN106281520 A CN 106281520A CN 201510246058 A CN201510246058 A CN 201510246058A CN 106281520 A CN106281520 A CN 106281520A
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Abstract
The invention discloses a kind of double-tower molecular sieve Gas Dehydration System, including gas dehydration pipeline and regeneration gas recovery pipe, described gas dehydration pipeline and regeneration gas recovery pipe are by arranging mole sieve drier as joint, described regeneration gas recovery pipe includes a heat exchanger, described heat exchanger is arranged between condensation separator and mole sieve drier, described regeneration gas inlet end first passes through heat exchanger and enters back into regeneration gas heater, is provided with H in described regeneration gas recycling can2S content detection instrument, it is provided with the first valve in described regeneration gas recovery pipe, draws two desulfuration pipelines at the two ends of the first valve and be connected to desulfurizing tower, enter from the bottom of desulfurizing tower, extend back regeneration gas recovery pipe from top, described desulfuration pipeline sets the second valve and the 3rd valve.Present invention seek to address that and existing Gas Dehydration System easily causes sulfur content enrichment in regeneration gas, affect regeneration gas quality and the problem of equipment safety, simultaneously improve efficiency of energy utilization.
Description
Technical field
The invention belongs to gas dehydration apparatus field, be specifically related to a kind of double-tower molecular sieve Gas Dehydration System.
Background technology
nullIn current gas chemical industry's industry，Before petroleum gas and compressed natural gas come into operation，Typically gas will be carried out purified treatment，These process are a series of chemical reaction or physical reactions process，The flow process finally having a step dehydration in these handling processes，It is mainly used in removing the moisture in the middle of natural gas，If natural gas contains water excess，Then may be to pipeline、Equipment produces and corrodes，The ice causing equipment blocks up，So natural gas must be carried out processed before coming into operation，Existing way is the absorption using double-tower molecular sieve to carry out the moisture in natural gas，After the mole sieve drier of double-tower molecular sieve absorbs certain moisture，By the regeneration gas after being passed through heating in mole sieve drier to take away the moisture on mole sieve drier，Mole sieve drier can be reused，Regeneration gas carries out condensation dehydration process again regeneration gas is recycled，Due in natural gas not only with moisture，Although the desulfurization through early stage processes the H also having trace2S gas residue, along with moisture can stick on mole sieve drier, thus is mixed in regeneration gas, owing to regeneration gas can be reused, then can cause the H in regeneration gas2The enrichment of S, sulfur content exceeds standard, and easily equipment is produced corrosion.
In the Chinese patent of Application No. " CN201020174355.X ", disclose the utility model patent of entitled " a kind of constant-pressure natural gas dehydration device based on double-tower molecular sieve ", its structure includes mole sieve drier one, mole sieve drier two, regeneration knockout drum, regeneration gas heater, regeneration gas cooler, auxiliary exsiccator one and auxiliary exsiccator two, after mole sieve drier one and mole sieve drier two parallel connection by pipeline respectively with regeneration gas heater, regeneration knockout drum and regeneration gas cooler connect, auxiliary exsiccator one, auxiliary exsiccator two parallel connection after by pipeline respectively with regeneration gas heater, regeneration gas cooler connects.The H in regeneration gas is easily made by this natual gas dehydrate unit and regeneration gas recovery system2The enrichment of S, affects regeneration gas quality and equipment safety.
Summary of the invention
For the technical problem of above-mentioned existence, the invention provides a kind of double-tower molecular sieve Gas Dehydration System, easily cause H solving the regeneration gas removal process in existing Gas Dehydration System2S gas is enriched with, affect regeneration gas quality and the problem of equipment safety, improve effect and the recovery system of regeneration gas in Gas Dehydration System, the sulfur content in regeneration gas can be monitored in real time, and regeneration gas is carried out desulfurization process, reduce the sulfur content of regeneration gas, regeneration gas pipeline is transformed simultaneously, promote efficiency of energy utilization.
A kind of double-tower molecular sieve Gas Dehydration System, including gas dehydration pipeline and regeneration gas recovery pipe, described gas dehydration pipeline and regeneration gas recovery pipe are by arranging mole sieve drier as joint, described gas dehydration pipeline includes natural gas inlet end successively, desulfurizing tower, mole sieve drier and gas storage well, described regeneration gas recovery pipe includes regeneration gas inlet end successively, regeneration gas heater, mole sieve drier, condensation separator and regeneration gas recycling can, described regeneration gas recovery pipe also includes a heat exchanger, described heat exchanger is arranged between condensation separator and mole sieve drier, described regeneration gas inlet end first passes through heat exchanger and enters back into regeneration gas heater, in described regeneration gas recycling can, H is installed2S content detection instrument, it is provided with the first valve in described regeneration gas recovery pipe, draws two desulfuration pipelines at the two ends of the first valve and be connected to desulfurizing tower, enter from the bottom of desulfurizing tower, extend back regeneration gas recovery pipe from top, described desulfuration pipeline sets the second valve and the 3rd valve.
Further, described mole sieve drier is made up of the first mole sieve drier and the second mole sieve drier parallel connection.
Further, four conversion valves are respectively set at the entrance and exit of described mole sieve drier and are connected into gas dehydration pipeline and regeneration gas recovery pipe.
Further, also include that emergency blow-down pipeline, described emergency blow-down pipeline are connected with the first mole sieve drier, the second mole sieve drier respectively, and be provided with the first emergency blow-down valve and the second emergency blow-down valve.
Further, described regeneration gas recovery pipe being provided with a safety vent valve, safety vent valve is between mole sieve drier and heat exchanger.
Further, separately it is provided with control unit, receives H2The signal of S content detection instrument and each valve is controlled.
Further, it is respectively arranged with the first filter separator and the second filter separator before and after described gas dehydration pipeline.
It is provided with heat exchanger so that regeneration gas can carry out heat exchange before entering regeneration gas heater and after going out mole sieve drier between the air inlet section and air outlet section of regeneration gas pipeline.Regeneration gas before entering mole sieve drier is heated by regeneration gas heater, reach uniform temperature and carry out the dehydration of mole sieve drier, the regeneration gas taking away moisture also needs by condensation to reclaim, add this heat exchange setting i.e. can regeneration gas be preheated, decrease the required energy consumed of regeneration gas heater, the regeneration gas of band moisture can be precooled again, reduce regeneration gas recovered temperature, improve condensation separation efficiency, improve the comprehensive utilization to the energy.
Native system is provided with the first valve in the air outlet section of regeneration gas pipeline, and the pipeline being connected with the desulfurizing tower of natural gas is drawn at the two ends of the first valve, by Valve controlling, utilize existing desulfurizing tower equipment to form the desulfurization pipeline of regeneration gas, in regeneration gas recycling can, add H simultaneously2S content detection instrument, passes through H2Sulfur content data feedback in the regeneration gas that S content detection instrument can will reclaim in real time is to control unit, if control unit finds that the sulfur content in regeneration gas exceedes certain numerical value, then can be by controlling valve, allow regeneration gas enter in desulfurizing tower and carry out desulfurization, reduce the sulfur content in regeneration gas, the sulfur content preventing regeneration gas is too high, and equipment is produced corrosivity, prevents the sulfur content in the natural gas on dehydration from producing impact.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, the accompanying drawing used required in embodiment or description of the prior art will be briefly described below, apparently, accompanying drawing in describing below is only some embodiments of the present invention, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the schematic diagram of a kind of double-tower molecular sieve Gas Dehydration System.
Detailed description of the invention
The invention discloses a kind of double-tower molecular sieve Gas Dehydration System, improve effect and the recovery system of regeneration gas in Gas Dehydration System, the sulfur content in regeneration gas can be monitored in real time, and regeneration gas is carried out desulfurization process, reduce the sulfur content of regeneration gas, regeneration gas pipeline is transformed simultaneously, promote efficiency of energy utilization.
Below in conjunction with the accompanying drawing in the present invention, the technical scheme in the present invention is clearly and completely described, it is clear that described is only a part of embodiment of the present invention rather than whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art are obtained on the premise of not making creative work, broadly fall into the scope of protection of the invention.
nullShown in Figure 1，A kind of double-tower molecular sieve Gas Dehydration System，Including gas dehydration pipeline and regeneration gas recovery pipe，Described gas dehydration pipeline and regeneration gas recovery pipe are by arranging mole sieve drier as joint，Described gas dehydration pipeline includes natural gas inlet end 2 successively、Desulfurizing tower 3、Mole sieve drier and gas storage well 11，Described regeneration gas recovery pipe includes regeneration gas inlet end 14 successively、Regeneration gas heater 9、Mole sieve drier、Condensation separator 18 and regeneration gas recycling can 19，Described regeneration gas recovery pipe also includes a heat exchanger 8，Described heat exchanger 8 is arranged between condensation separator 18 and mole sieve drier，Described regeneration gas inlet end 14 first passes through heat exchanger 8 and enters back into regeneration gas heater 9，Heat exchanger 8 is as the heat-exchanger rig between regeneration gas air inlet section and air outlet section，In described regeneration gas recycling can 19, H is installed2S content detection instrument, the first valve 15 it is provided with in described regeneration gas recovery pipe, draw two desulfuration pipelines at the two ends of the first valve 15 and be connected to desulfurizing tower 3, enter from the bottom of desulfurizing tower 3, extend back regeneration gas recovery pipe from top, described desulfuration pipeline sets the second valve 16 and the 3rd valve 17.
Described mole sieve drier is made up of the first mole sieve drier 5 and the second mole sieve drier 6 parallel connection, four conversion valves are respectively set at the entrance and exit of described mole sieve drier and are connected into gas dehydration pipeline and regeneration gas recovery pipe, as shown in Figure 1, the porch of mole sieve drier is respectively provided with conversion valve 1a, conversion valve 1b, conversion valve 1c, conversion valve 1d, the exit of mole sieve drier is respectively provided with conversion valve 1e, conversion valve 1f, conversion valve 1g, conversion valve 1h, separately it is provided with control unit, receives H2The signal of S content detection instrument and each valve is controlled.
Also include emergency blow-down pipeline, described emergency blow-down pipeline is connected with first mole sieve drier the 5, second mole sieve drier 6 respectively, and it is provided with the first emergency blow-down valve 10 and the second emergency blow-down valve 11, first emergency blow-down valve 10 and the second emergency blow-down valve 11, for diffusing the natural gas within mole sieve drier under accident, prevent fire incident.Being provided with a safety vent valve 7 in described regeneration gas recovery pipe, safety vent valve 7, between mole sieve drier and heat exchanger 8, is respectively arranged with the first filter separator 4 and the second filter separator 13 before and after described gas dehydration pipeline.
The operation logic of the present invention is: when this system is run, keep one dewatering state being in natural gas of two mole sieve driers, one reproduced state being in regeneration gas, whole system two flow processs simultaneously are being carried out, dehydration process and regeneration technology flow process.
Dehydration process is: natural gas Primordial Qi is in pre-treatment enters into this system, with moisture, dust and H in natural gas now2S、SO2Sulfides, natural gas first passes through desulfurizing tower 3 and carries out desulfurization process, natural gas enters from the bottom inlet of desulfurizing tower 3, after treatment from desulfurizing tower 3 top out, preliminary hydro-extraction dedusting is carried out through the first filter separator 4, carry out processed by mole sieve drier again, then enter entrance gas storage well 11 after the second filter separator 13 is dehydrated dedusting again and store.
Regeneration technology flow process is: regeneration gas tentatively heats through heat exchanger 8, again heat through regeneration gas heater 9 again, the regeneration gas of uniform temperature is entered bottom mole sieve drier, take away the wherein moisture of absorption in dehydration process, regeneration gas with moisture is from mole sieve drier out, tentatively lowering the temperature through heat exchanger 8, then regeneration gas therein separated with condensed fluid by condensation separator 18, the regeneration gas after separation enters regeneration gas recycling can 19 and re-uses.
When the first mole sieve drier 5 is in the dewatering state of natural gas, when second mole sieve drier 6 is in the reproduced state of regeneration gas, control unit controls conversion valve 1a, conversion valve 1d, conversion valve 1g and conversion valve 1f and opens, control conversion valve 1b, conversion valve 1c, conversion valve 1e and conversion valve 1h to close, natural gas carries out gas dehydration through the first mole sieve drier 5, and regeneration gas is dried device regeneration through the second mole sieve drier 6；
When the first mole sieve drier 5 is in the reproduced state of regeneration gas, when second mole sieve drier 6 is in the dewatering state of natural gas, control unit controls conversion valve 1b, conversion valve 1c, conversion valve 1e and conversion valve 1h and opens, control conversion valve 1a, conversion valve 1d, conversion valve 1g and conversion valve 1f to close, natural gas carries out gas dehydration through the second mole sieve drier 6, and regeneration gas is dried device regeneration through the first mole sieve drier 5.
H in regeneration gas recycling can 192The sulfur content of regeneration gas monitored in real time by S content detection instrument, and sulfur content data are converted into electronic signal transmission to control unit, when the sulfur content of regeneration gas exceedes certain numerical value, then control unit automatically controls natural gas air inlet closedown, simultaneously close off the first valve 15, open the second valve 16 and the 3rd valve 17, regeneration gas through mole sieve drier enters in desulfurizing tower 3 by the second valve 16, carry out desulfurization process, reduce the sulfur content of regeneration gas, reuse again returning to regeneration gas recycling can 19 through the 3rd valve 17 through the regeneration gas of desulfurization.
By above description, compared with prior art, it is an advantage of the current invention that: 1, the sulfur content of regeneration gas can be control effectively, prevent sulfur content in regeneration gas too high, equipment is produced corrosivity, it is ensured that the quality of natural gas；2, the energy is effectively utilized, decrease the required energy consumed of regeneration gas heater, reduce again regeneration gas recovered temperature, improve condensation separation efficiency, reduce power consumption.
Above content is to combine concrete preferred implementation further description made for the present invention, it is impossible to assert the present invention be embodied as be confined to these explanations.For general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, it is also possible to make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (7)
1. a double-tower molecular sieve Gas Dehydration System, including gas dehydration pipeline and regeneration gas recovery pipe, described gas dehydration pipeline and regeneration gas recovery pipe are by arranging mole sieve drier as joint, described gas dehydration pipeline includes natural gas inlet end successively, desulfurizing tower, mole sieve drier and gas storage well, described regeneration gas recovery pipe includes regeneration gas inlet end successively, regeneration gas heater, mole sieve drier, condensation separator and regeneration gas recycling can, it is characterized in that, described regeneration gas recovery pipe also includes a heat exchanger, described heat exchanger is arranged between condensation separator and mole sieve drier, described regeneration gas inlet end first passes through heat exchanger and enters back into regeneration gas heater, in described regeneration gas recycling can, H is installed2S content detection instrument, it is provided with the first valve in described regeneration gas recovery pipe, draws two desulfuration pipelines at the two ends of the first valve and be connected to desulfurizing tower, enter from the bottom of desulfurizing tower, extend back regeneration gas recovery pipe from top, described desulfuration pipeline sets the second valve and the 3rd valve.
A kind of double-tower molecular sieve Gas Dehydration System the most according to claim 1, it is characterised in that described mole sieve drier is made up of the first mole sieve drier and the second mole sieve drier parallel connection.
A kind of double-tower molecular sieve Gas Dehydration System the most according to claim 2, it is characterised in that four conversion valves are respectively set at the entrance and exit of described mole sieve drier and are connected into gas dehydration pipeline and regeneration gas recovery pipe.
A kind of double-tower molecular sieve Gas Dehydration System the most according to claim 2, it is characterized in that, also include that emergency blow-down pipeline, described emergency blow-down pipeline are connected with the first mole sieve drier, the second mole sieve drier respectively, and be provided with the first emergency blow-down valve and the second emergency blow-down valve.
A kind of double-tower molecular sieve Gas Dehydration System the most according to claim 1, it is characterised in that being provided with a safety vent valve in described regeneration gas recovery pipe, safety vent valve is between mole sieve drier and heat exchanger.
A kind of double-tower molecular sieve Gas Dehydration System the most according to claim 1, it is characterised in that be separately provided with control unit, receive H2The signal of S content detection instrument and each valve is controlled.
A kind of double-tower molecular sieve Gas Dehydration System the most according to claim 1, it is characterised in that be respectively arranged with the first filter separator and the second filter separator before and after described gas dehydration pipeline.
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| CN201510246058.9A CN106281520A (en) | 2015-05-15 | 2015-05-15 | A kind of double-tower molecular sieve Gas Dehydration System |
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| CN201510246058.9A CN106281520A (en) | 2015-05-15 | 2015-05-15 | A kind of double-tower molecular sieve Gas Dehydration System |
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Cited By (5)
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| CN106984824A (en) * | 2017-04-17 | 2017-07-28 | 河源普益硬质合金厂有限公司 | A kind of energy-saving tungsten oxide hydrogen reducing system |
| CN111939732A (en) * | 2020-08-10 | 2020-11-17 | 浙江勤策空分设备有限公司 | Operation method of waste heat regeneration compressed air dryer |
| CN114214098A (en) * | 2022-01-14 | 2022-03-22 | 浙江机电职业技术学院 | High-reliability heating regenerated natural gas molecular sieve dehydration pry |
| CN114791087A (en) * | 2022-05-20 | 2022-07-26 | 大庆高浮科技开发有限公司 | Natural gas pressure regulating system |
| CN116966711A (en) * | 2023-08-11 | 2023-10-31 | 中工国际工程股份有限公司 | Light hydrocarbon recovery system |
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| CN116966711B (en) * | 2023-08-11 | 2024-05-10 | 中工国际工程股份有限公司 | Light hydrocarbon recovery system |
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