CN101575532A - Method and device for reclaiming low-pressure hydrocarbon-contained gas - Google Patents
Method and device for reclaiming low-pressure hydrocarbon-contained gas Download PDFInfo
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- CN101575532A CN101575532A CN 200910086111 CN200910086111A CN101575532A CN 101575532 A CN101575532 A CN 101575532A CN 200910086111 CN200910086111 CN 200910086111 CN 200910086111 A CN200910086111 A CN 200910086111A CN 101575532 A CN101575532 A CN 101575532A
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Abstract
The invention provides a method and a device for reclaiming low-pressure hydrocarbon-contained gas. The method comprises the following steps of: injecting a liquid injection medium so as to absorb the low-pressure hydrocarbon-contained gas at the outside of a liquid injector to the inside of the liquid injector and to be boosted and condensed as liquid hydrocarbon; subsequently dissolving the liquid hydrocarbon in the liquid injection medium, wherein the liquid injection medium is a petroleum hydrocarbon; and carrying out gas liquid separation on the injected liquid injection medium, wherein the separated gas is the non-condensable composition in the low-pressure hydrocarbon-contained gas and the separated liquid is the petroleum hydrocarbon in which the liquid hydrocarbon is dissolved. By taking the petroleum hydrocarbon as the liquid injection medium of the liquid injector, the method and the device for reclaiming the low-pressure hydrocarbon-contained gas lead the condensable compositions in the low-pressure hydrocarbon-contained gas to be absorbed and dissolved in the liquid injection medium; therefore, the reclaiming rate for reclaiming the condensable composition in the low-pressure hydrocarbon-contained gas as the liquid hydrocarbon is high, the separation is simple and the running cost is low.
Description
Technical field
The present invention relates to gas recovery techniques, relate in particular to a kind of low-pressure hydrocarbon-contained Gas recovering method and device.
Background technology
Low-pressure hydrocarbon-contained gas is in the petrochemical enterprise production process, because shutting down, operation fluctuation or the production safety accident (security incident that comprises production and equipment, for example Zhuan Zhi safety valve leakage etc.) reason such as is by the volatile hydrocarbon component of production equipment to low-pressure hydrocarbon-contained gas system discharging.Wherein, torch gas is a kind of of low-pressure hydrocarbon-contained gas.Torch gas is oil-refining chemical enterprise general name to the component of the low-pressure hydrocarbon-contained gas discharge system discharging of special foundation under ordinary production or accidental state.When ordinary production, the discharging of torch gas source comprises the long-term discharging intentionally of partial devices and the leakage of accident bleed-off system; In the state of accident, the discharging of torch gas source is the discharge of the Emergency Exhaust System of each device.
Because sudden, the uncertainty of low-pressure hydrocarbon-contained gaseous emission and the diversity and the complicacy of discharge point, cause to contain in the low-pressure hydrocarbon-contained gas a large amount of coagulated component (hydrocarbon of carbon more than three), this can coagulate component is valuable industrial chemicals as liquid hydrocarbon, thus, need that this can be coagulated component and be recovered as liquid hydrocarbon.Reclaim in the technology of low-pressure hydrocarbon-contained gas at existing use mechanical compressor,, cause the frequent breakage of compressor, bring very big disadvantageous effect for production of petrochemical complex safety and steady and economic benefit owing in compression process, produce lime set.
In order to address the above problem, prior art provides a kind of low-pressure hydrocarbon-contained Gas recovering method, and this method is used liquid ejector according to the fluidic venturi principle, with liquid (water or thanomin) is that medium sprays, to the recovery of boosting of low-pressure hydrocarbon-contained gas.Use this method to reclaim low-pressure hydrocarbon-contained gas, avoided because the infringement that the generation of lime set brings mechanical compressor in the compression process, so this method stable and reliable operation, for the production of petrochemical complex safety and steady provides guarantee.Yet, owing to make water or thanomin as the spouting of liquid medium in this method, when low-pressure hydrocarbon-contained gas being boosted recovery, be merely able to the part condensable gas is recovered as liquid hydrocarbon, and the most of condensable gas (hydrocarbon of carbon more than three, as propane, propylene, butane, butylene etc.) be used as gas and enter fuel system, caused the waste of liquid towards hydrocarbon thus; And, liquid hydrocarbon need be separated with water or thanomin when reclaiming liquid hydrocarbon, therefore can increase operation cost.
Summary of the invention
First purpose of the present invention is to provide a kind of low-pressure hydrocarbon-contained Gas recovering method, in order to solve in the prior art coagulated component and the high defective of operation cost in can only partially recycled low-pressure hydrocarbon-contained gas, realize that a large amount of coagulated component and operation costs that reclaim in the low-pressure hydrocarbon-contained gas are low.
Second purpose of the present invention is to provide a kind of low-pressure hydrocarbon-contained gas concentration unit, in order to solve in the prior art coagulated component and the high defective of operation cost in can only partially recycled low-pressure hydrocarbon-contained gas, realize that a large amount of coagulated component and operation costs that reclaim in the low-pressure hydrocarbon-contained gas are low.
In order to realize above-mentioned first purpose, the invention provides a kind of low-pressure hydrocarbon-contained Gas recovering method, comprising:
The atomizing of liquids ejection medium is absorbed into low-pressure hydrocarbon-contained gas outside the liquid ejector and boosts within the described liquid ejector and coagulate to be liquid hydrocarbon, and described liquid hydrocarbon is dissolved in the described spouting of liquid medium; Wherein, described spouting of liquid medium is a petroleum hydrocarbon;
The described spouting of liquid medium that ejects is carried out gas-liquid separation; Wherein, isolated gas is can not coagulate component in the described low-pressure hydrocarbon-contained gas, and isolated liquid is the petroleum hydrocarbon that is dissolved with described liquid hydrocarbon.
In order to realize above-mentioned second purpose, the invention provides a kind of low-pressure hydrocarbon-contained gas concentration unit, comprising:
Liquid ejector is used for the atomizing of liquids ejection medium, low-pressure hydrocarbon-contained gas outside the liquid ejector is absorbed into boosts within the described liquid ejector and coagulate to be liquid hydrocarbon, and described liquid hydrocarbon is dissolved in the described spouting of liquid medium; Wherein, described spouting of liquid medium is a petroleum hydrocarbon;
Separator links to each other with the jet exit of described liquid ejector, is used for the described spouting of liquid medium that ejects is carried out gas-liquid separation; Wherein, isolated gas is can not coagulate component in the described low-pressure hydrocarbon-contained gas, and isolated liquid is the petroleum hydrocarbon that is dissolved with described liquid hydrocarbon.
Low-pressure hydrocarbon-contained Gas recovering method provided by the invention and device, by using the spouting of liquid medium of petroleum hydrocarbon as liquid ejector, be dissolved in this spouting of liquid medium after making coagulated component in the low-pressure hydrocarbon-contained gas be absorbed, thus the coagulated component in the low-pressure hydrocarbon-contained gas is recovered as the rate of recovery height of liquid hydrocarbon, and separate simply, operation cost is low.
Description of drawings
Fig. 1 is the schema of the low-pressure hydrocarbon-contained Gas recovering method embodiment of the present invention.
Embodiment
Further specify the technical scheme of the embodiment of the invention below in conjunction with the drawings and specific embodiments.
Fig. 1 is the schema of the low-pressure hydrocarbon-contained Gas recovering method embodiment of the present invention.As shown in Figure 1, this method comprises:
Add the spouting of liquid medium via passage 1 in liquid ejector 10, this spouting of liquid medium is a petroleum hydrocarbon, and this petroleum hydrocarbon can be petroleum naphtha, diesel oil, kerosene or gasoline; The pressure at place, the spouting of liquid medium inlet of liquid ejector 10 is higher, and the process that adds the spouting of liquid medium via passage 1 in liquid ejector 10 can be thus: the use pump is transported to the spouting of liquid medium in the liquid ejector 10 via passage 1;
In the embodiment of the invention owing to use petroleum hydrocarbon as the spouting of liquid medium, so to low-pressure hydrocarbon-contained gas that ejects through liquid ejector 10 and the petroleum hydrocarbon mixture that is dissolved with liquid hydrocarbon, only need carry out gas-liquid separation and get final product, separate with petroleum hydrocarbon and need not other separating device liquid towards hydrocarbon by separator 20.And adopt water or thanomin in the prior art as the spouting of liquid medium, so to low-pressure hydrocarbon-contained gas that ejects through liquid ejector 10 and the mixture that is dissolved with the spouting of liquid medium of liquid hydrocarbon, except carrying out gas-liquid separation, also need other separating device that liquid hydrocarbon is separated with water or thanomin.The method that provides of the embodiment of the invention has been simplified sepn process greatly thus, has reduced operation cost.Owing to use petroleum hydrocarbon as the spouting of liquid medium in the embodiment of the invention, increased the solubleness of low-pressure hydrocarbon-contained gas and liquid hydrocarbon in addition, made method that the embodiment of the invention provides specific absorption height low-pressure hydrocarbon-contained gas.
As shown in Figure 1, low-pressure hydrocarbon-contained Gas recovering method embodiment provided by the invention can also may further comprise the steps:
The isolated liquid of a part via passage 6 by heat exchanger 30 cooling after, fed in the liquid ejectors 10 as the spouting of liquid medium by pump 40, realize the circulation of spouting of liquid medium thus.
In the present embodiment, can the spouting of liquid medium be added in the liquid ejector 10 by passage 1; Also can the spouting of liquid medium be added in the separator 20, by pump 40 the spouting of liquid medium be added in the liquid ejector 10 then by passage 3.Wherein, the spouting of liquid medium can be from each device of petrochemical enterprise, such as gasoline or diesel oil from catalytic cracking unit or delayed coking unit, from petroleum naphtha, kerosene or the diesel oil of water distilling apparatus, the spouting of liquid medium also can be from the storage tank field of oil products such as petroleum naphtha, kerosene, gasoline or diesel oil.The liquefied hydrocarbon of carbon three above components in the low-pressure hydrocarbon-contained gas of absorption after separator carries out gas-liquid separation, sent back source apparatus or be sent to other relative unit by passage 5, can utilize the processing unit of the device that liquefied hydrocarbon sent back to thus, different components is wherein separated, also need not to be equipped with specially thermal source and need not newly-built tripping device, make that reclaiming isolating operation cost reduces significantly.
Low-pressure hydrocarbon-contained Gas recovering method embodiment provided by the invention, by using the spouting of liquid medium of petroleum hydrocarbon as liquid ejector, be dissolved in this spouting of liquid medium after making coagulated component in the low-pressure hydrocarbon-contained gas be absorbed, thus the coagulated component in the low-pressure hydrocarbon-contained gas is recovered as the rate of recovery height of liquid hydrocarbon, and follow-up sepn process can be used original device, lower greatly operation cost.
The present invention also provides a kind of low-pressure hydrocarbon-contained gas concentration unit embodiment, and as shown in Figure 1, this device comprises: liquid ejector 10 and separator 20.Liquid ejector 10 is used for the atomizing of liquids ejection medium, in the process of spraying, can be dissolved with the low-pressure hydrocarbon-contained gas that is absorbed by liquid ejector 10 in the spouting of liquid medium; The gas inlet of liquid ejector 10 connects low-pressure hydrocarbon-contained gas system, and the source of low-pressure hydrocarbon-contained gas can be a low-pressure pipe network, also can be by the device discharging; Wherein the spouting of liquid medium is a petroleum hydrocarbon, and this petroleum hydrocarbon can be petroleum naphtha, diesel oil, kerosene or gasoline.Separator 20 links to each other with the jet exit of liquid ejector 10, is used for low-pressure hydrocarbon-contained gas that is ejected by liquid ejector 10 and the spouting of liquid medium that is dissolved with liquid hydrocarbon are carried out gas-liquid separation; Wherein, isolated gas is can not coagulate component in the low-pressure hydrocarbon-contained gas, and isolated liquid is the petroleum hydrocarbon that is dissolved with liquid hydrocarbon; Separator 20 can be vertical or horizontal settlement separator.Petroleum hydrocarbon as the spouting of liquid medium can be from each device of petrochemical enterprise, such as gasoline or diesel oil from catalytic cracking unit or delayed coking unit, from petroleum naphtha, kerosene or the diesel oil of water distilling apparatus, the spouting of liquid medium also can be from the storage tank field of oil products such as petroleum naphtha, kerosene, gasoline or diesel oil.
On the basis of said apparatus embodiment, low-pressure hydrocarbon-contained gas concentration unit embodiment provided by the invention can also comprise: heat exchanger 30 and pump 40.Heat exchanger 30 is used to cool off a part of separated device 20 isolated liquid; Pump 40 is used for and will feeds liquid ejector 10 as the spouting of liquid medium through heat exchanger 20 cooled liquid.
This device embodiment in use can be added the spouting of liquid medium in the liquid ejector 10 by passage 1; Also can the spouting of liquid medium be added in the separator 20, by pump 40 the spouting of liquid medium be added in the liquid ejector 10 then by passage 3.In addition, when using this device embodiment that low-pressure hydrocarbon-contained gas is reclaimed, the liquefied hydrocarbon of carbon three above components in the low-pressure hydrocarbon-contained gas of absorption after separator carries out gas-liquid separation, sent back source apparatus or be sent to other relative unit by passage 5, can utilize the processing unit of the device that liquefied hydrocarbon sent back to thus, different components is wherein separated, also need not to be equipped with specially thermal source, make that reclaiming isolating operation cost reduces significantly and need not newly-built tripping device.
Low-pressure hydrocarbon-contained gas concentration unit embodiment provided by the invention, by using the spouting of liquid medium of petroleum hydrocarbon as liquid ejector, be dissolved in this spouting of liquid medium after making coagulated component in the low-pressure hydrocarbon-contained gas be absorbed, thus the coagulated component in the low-pressure hydrocarbon-contained gas is recovered as the rate of recovery height of liquid hydrocarbon, and follow-up sepn process can be used original device, lower greatly operation cost.
It should be noted that at last: above embodiment only in order to technical scheme of the present invention to be described, is not intended to limit; Although with reference to previous embodiment the present invention is had been described in detail, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment put down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (7)
1, a kind of low-pressure hydrocarbon-contained Gas recovering method is characterized in that, comprising:
The atomizing of liquids ejection medium is absorbed into low-pressure hydrocarbon-contained gas outside the liquid ejector and boosts within the described liquid ejector and coagulate to be liquid hydrocarbon, and described liquid hydrocarbon is dissolved in the described spouting of liquid medium; Wherein, described spouting of liquid medium is a petroleum hydrocarbon;
The described spouting of liquid medium that ejects is carried out gas-liquid separation; Wherein, isolated gas is can not coagulate component in the described low-pressure hydrocarbon-contained gas, and isolated liquid is the petroleum hydrocarbon that is dissolved with described liquid hydrocarbon.
2, low-pressure hydrocarbon-contained Gas recovering method according to claim 1 is characterized in that, also comprises: the described isolated liquid of cooling segment via pump, feeds in the described liquid ejector described cooled liquid as the spouting of liquid medium.
3, low-pressure hydrocarbon-contained Gas recovering method according to claim 1 and 2 is characterized in that: described low-pressure hydrocarbon-contained gas is torch gas.
4, low-pressure hydrocarbon-contained Gas recovering method according to claim 3, it is characterized in that: described petroleum hydrocarbon comprises petroleum naphtha, diesel oil, kerosene or gasoline.
5, a kind of low-pressure hydrocarbon-contained gas concentration unit is characterized in that, comprising:
Liquid ejector is used for the atomizing of liquids ejection medium, low-pressure hydrocarbon-contained gas outside the liquid ejector is absorbed into boosts within the described liquid ejector and coagulate to be liquid hydrocarbon, and described liquid hydrocarbon is dissolved in the described spouting of liquid medium; Wherein, described spouting of liquid medium is a petroleum hydrocarbon;
Separator links to each other with the jet exit of described liquid ejector, is used for the described spouting of liquid medium that ejects is carried out gas-liquid separation; Wherein, isolated gas is can not coagulate component in the described low-pressure hydrocarbon-contained gas, and isolated liquid is the petroleum hydrocarbon that is dissolved with described liquid hydrocarbon.
6, low-pressure hydrocarbon-contained gas concentration unit according to claim 5 is characterized in that: also comprise heat exchanger and pump; Described heat exchanger is used for cooling segment through the isolated liquid of described separator; Described pump is used for the liquid after described heat exchanger cooling is fed described liquid ejector as the spouting of liquid medium.
7, according to claim 5 or 6 described low-pressure hydrocarbon-contained gas concentration units, it is characterized in that: described petroleum hydrocarbon comprises petroleum naphtha, diesel oil, kerosene or gasoline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910086111 CN101575532B (en) | 2009-06-02 | 2009-06-02 | Method and device for reclaiming low-pressure hydrocarbon-contained gas |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910086111 CN101575532B (en) | 2009-06-02 | 2009-06-02 | Method and device for reclaiming low-pressure hydrocarbon-contained gas |
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| CN101575532A true CN101575532A (en) | 2009-11-11 |
| CN101575532B CN101575532B (en) | 2013-04-24 |
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| CN 200910086111 Expired - Fee Related CN101575532B (en) | 2009-06-02 | 2009-06-02 | Method and device for reclaiming low-pressure hydrocarbon-contained gas |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102464999A (en) * | 2010-11-05 | 2012-05-23 | 中国石油化工股份有限公司 | Oil gas absorption recovering method |
| CN102465000A (en) * | 2010-11-05 | 2012-05-23 | 中国石油化工股份有限公司 | Condensation recycling method of oil gas |
| CN110740801A (en) * | 2017-05-09 | 2020-01-31 | 芬兰国家技术研究中心股份公司 | Method and device for cleaning gas with at least two injection phases and use |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3616598A (en) * | 1969-08-14 | 1971-11-02 | Black Sivalls & Bryson Inc | Method and system for reconcentrating liquid absorbent |
| CN2145352Y (en) * | 1992-11-20 | 1993-11-03 | 杨守信 | Low-voltage steam refrigeration device |
| CN100427463C (en) * | 2006-09-14 | 2008-10-22 | 宁波万华聚氨酯有限公司 | Apparatus for preparing high-boiling-point heat-sensitive substance, and its application method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102464999A (en) * | 2010-11-05 | 2012-05-23 | 中国石油化工股份有限公司 | Oil gas absorption recovering method |
| CN102465000A (en) * | 2010-11-05 | 2012-05-23 | 中国石油化工股份有限公司 | Condensation recycling method of oil gas |
| CN102465000B (en) * | 2010-11-05 | 2015-02-18 | 中国石油化工股份有限公司 | Condensation recycling method of oil gas |
| CN102464999B (en) * | 2010-11-05 | 2015-04-15 | 中国石油化工股份有限公司 | Oil gas absorption recovering method |
| CN110740801A (en) * | 2017-05-09 | 2020-01-31 | 芬兰国家技术研究中心股份公司 | Method and device for cleaning gas with at least two injection phases and use |
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| CN101575532B (en) | 2013-04-24 |
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Granted publication date: 20130424 Termination date: 20180602 |