CN103691277A - Method for absorbing hydrogen sulfide in feed gas circularly by utilizing hydrogen-sulfide removing agent - Google Patents
Method for absorbing hydrogen sulfide in feed gas circularly by utilizing hydrogen-sulfide removing agent Download PDFInfo
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- CN103691277A CN103691277A CN201310671360.XA CN201310671360A CN103691277A CN 103691277 A CN103691277 A CN 103691277A CN 201310671360 A CN201310671360 A CN 201310671360A CN 103691277 A CN103691277 A CN 103691277A
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Abstract
The invention discloses a method for absorbing hydrogen sulfide in feed gas circularly by utilizing a hydrogen-sulfide removing agent. The method comprises the following steps of inputting the hydrogen-sulfide removing agent as an absorbing agent from a storage tank from a liquid-phase inlet of a rotary packed bed by a circulating pump, inputting the feed gas containing hydrogen sulfide from a gas-phase inlet of the rotary packed bed, reacting the hydrogen-sulfide removing agent with the hydrogen sulfide in the feed gas, and outputting the purified feed gas from a gas-phase outlet of the rotary packed bed; flowing out the hydrogen-sulfide removing agent absorbing the hydrogen sulfide gas from a liquid-phase outlet of the rotary packed bed and to be inputted into the storage tank for recycling. The method disclosed by the invention has the advantages that the occupied space is small, the structure of the equipment is simple, full contact and reaction of the hydrogen-sulfide removing agent and the hydrogen sulfide in the feed gas is guaranteed, the hydrogen-sulfide removing agent is saved, and the cost is reduced; for an ocean oil-production platform, desulfurizing operation for associated gas (natural gas) can be realized on site, so that the corrosion of the hydrogen sulfide to a gas transmission ocean pipe is reduced and the benefit to protecting the whole gas transmission ocean pipe is achieved; the hydrogen-sulfide removing agent can be recycled.
Description
Technical field
The present invention relates to a kind of method for gas purification, relate to particularly a kind of method that hydrogen sulfide scavenger circulation absorbs hydrogen sulfide in unstripped gas.
Background technology
For the different sulfur contents of diving in unstripped gas (natural gas, accompanying gas with crude oil or water-gas), there is different treatment technologies at present, when hydrogen sulfide content is higher in unstripped gas in general (being greater than 20t/d), mainly take Crouse's sulfur removal technology; In unstripped gas, dive sulfur content at 200k
gduring-20t/d, generally take sulfonation titanium cyanogen cobalt sulfur removal technology or Complexing Iron regenerative sulfur binding technique, the sulfur content of diving in unstripped gas is lower than 200k
gduring/d, mainly adopt online medicament ejector dosing method to remove hydrogen sulfide.Because spraying equipment is annotated online in unstripped gas feed-line, cannot guarantee that hydrogen sulfide scavenger fully contacts with hydrogen sulfide in gas phase, in order to guarantee desulfurized effect, the dosage of hydrogen sulfide scavenger is often excessive.The method that simple medicament ejector adds exists chemical feeding quantity large, and medicament utilization rate is low, and the poor and product contamination gas of desulfurized effect equates problem, causes desulphurization cost higher.
Middle and later periods in 20th century, the development of desulfurization medicament is rapid, researcher is tested by a large amount of lab and fields, develop and invented multiple hydrogen sulfide chemical scavenger, as metallic compound, nitrite, methacrylaldehyde, triazines reactant etc. can both change little, the free from corrosion sulfur-bearing thing of toxicity into hydrogen sulfide effectively.Wherein triazines reactant is the most effective hydrogen sulfide scavenger, in oil desulfurization, selexol process, is used widely, and especially the anti-corrosion treatment of warehousing and transportation facilities is carried out in oil gas field desulfurization.
Rotary packed bed (RPB), make solution-air fully contact in rotary filler layer, in the situation that obtaining strong disturbance, the high degree of dispersion of liquid phase, surperficial renewal rapidly and boundary carry out mass transfer, heat transfer, process is strengthened, compare with tower equipment, high 1 to 3 order of magnitude of volume transmission quality coefficient, the volume and weight of equipment is only a few percent of tower equipment, is called " transistor of chemical industry ".
At present, not yet someone adopts rotary packed bed (RPB) strengthening gas to contact with hydrogen sulfide scavenger solution the report that carries out desulfurization.
Summary of the invention
The object of the invention is to overcome prior art deficiency, provide a kind of hydrogen sulfide scavenger circulation to absorb the method for hydrogen sulfide in unstripped gas.
Technical scheme of the present invention is summarized as follows:
Hydrogen sulfide scavenger circulation absorbs a method for hydrogen sulfide in unstripped gas, comprises the steps:
The hydrogen sulfide scavenger as absorbent that comes from storage tank 2 is inputted from rotary packed bed 1 liquid phase entrance 3 through circulating pump 7, hydrogen sulfide containing unstripped gas is inputted from rotary packed bed gas phase entrance 4, hydrogen sulfide scavenger is reacted with the hydrogen sulfide in unstripped gas, and the unstripped gas after purification is from 5 outputs of rotary packed bed gaseous phase outlet; Hydrogen sulfide scavenger after absorbing hydrogen sulphide gas flows out and is input to storage tank 2 from rotary packed bed liquid-phase outlet 6 and recycles.
When the pH value of the hydrogen sulfide scavenger after the absorbing hydrogen sulphide gas in storage tank 2 is less than 8, change hydrogen sulfide scavenger.
The temperature of described reaction is-30 ℃～90 ℃, and reaction pressure is 0.1Mpa-6.0Mpa, and hydrogen sulfide containing unstripped gas tolerance is 5000-16000Nm
3/ d, gas-liquid volume ratio is 50:1-1000:1.
Described unstripped gas is natural gas, accompanying gas with crude oil or water-gas.
Described hydrogen sulfide scavenger is GLT-203, methyl diethanolamine, HW-700, ST1122 or ST1248.
Method of the present invention has sled piece, and to take up an area space little, and simple in equipment has guaranteed that hydrogen sulfide scavenger, fully with the hydrogen sulfide haptoreaction in unstripped gas, saved hydrogen sulfide scavenger, has reduced unstripped gas desulphurization cost.For offshore oil production platform, owing to taking up an area, space is little, can realize on the spot associated gas (or natural gas) desulfurization operations, reduces the corrosion of hydrogen sulfide to gas transmission sea pipe, is conducive to protect whole piece gas transmission sea pipe.Hydrogen sulfide scavenger can recycle.
Accompanying drawing explanation
Fig. 1 is process chart of the present invention.
The specific embodiment
Below by the drawings and specific embodiments, the invention will be further elaborated, its objective is that the cited case does not limit the scope of the invention for better understanding content of the present invention.
As shown in Figure 1.
Hydrogen sulfide scavenger circulation absorbs a method for hydrogen sulfide in unstripped gas, comprises the steps:
Select rotary packed bed (RPB) 1, storage tank 2 and circulating pump 7.
The hydrogen sulfide scavenger as absorbent that comes from storage tank 2 is inputted from rotary packed bed 1 liquid phase entrance 3 through circulating pump 7, hydrogen sulfide containing unstripped gas is inputted from rotary packed bed gas phase entrance 4, hydrogen sulfide scavenger is reacted with the hydrogen sulfide in unstripped gas, and the unstripped gas after purification is from 5 outputs of rotary packed bed gaseous phase outlet; Hydrogen sulfide scavenger after absorbing hydrogen sulphide gas flows out and is input to storage tank 2 from rotary packed bed liquid-phase outlet 6 and recycles.
Hydrogen sulfide scavenger (the HW-700 as absorbent of storage tank will be come from, main component is compound in triazine class, Baker Co., Ltd) through circulating pump, from rotary packed bed liquid phase entrance, input, the accompanying gas with crude oil of sulfide hydrogen 3000ppm is inputted from rotary packed bed gas phase entrance, hydrogen sulfide scavenger is reacted with the hydrogen sulfide in accompanying gas with crude oil, 90 ℃ of the temperature of reaction, reaction pressure is 0.1Mpa, hydrogen sulfide containing unstripped gas tolerance is 5000Nm
3/ d, gas-liquid volume ratio is 100:1, rotary packed bed (RPB) rotor diameter 600mm, internal diameter 200mm, rotor height 100mm, rotary packed bed (RPB) rotating speed 800rpm, the accompanying gas with crude oil after purification flows out from rotary packed bed gaseous phase outlet; Adopt iodimetric titration to detect the hydrogen sulfide content of cleaned crude oil associated gas, result is 2ppm.Hydrogen sulfide scavenger after absorbing hydrogen sulphide gas flows out and is input to storage tank from rotary packed bed liquid-phase outlet and recycles.
Select rotary packed bed, storage tank and circulating pump; Hydrogen sulfide scavenger (the ST1122 as absorbent that comes from storage tank, main component is compound in triazine class, Clariant company) through circulating pump, from rotary packed bed liquid phase entrance, input, the water-gas of sulfide hydrogen 200ppm is inputted from rotary packed bed gas phase entrance, hydrogen sulfide scavenger is reacted with the hydrogen sulfide in unstripped gas, temperature-30 ℃ of reaction, reaction pressure is 0.7Mpa, hydrogen sulfide containing water-gas tolerance is 16000Nm
3/ d, gas-liquid volume ratio is 50:1, rotary packed bed (RPB) rotor diameter 800mm, internal diameter 220mm, rotor height 100mm, rotary packed bed (RPB) rotating speed 800rpm, the water-gas after purification flows out from rotary packed bed gaseous phase outlet; Adopt iodimetric titration to detect the hydrogen sulfide content of the coal gas of purifying waste water, result is 1ppm.Hydrogen sulfide scavenger after absorbing hydrogen sulphide gas flows out and is input to storage tank from rotary packed bed liquid-phase outlet and recycles.
Select rotary packed bed, storage tank and circulating pump; Hydrogen sulfide scavenger (the GLT-203 as absorbent that comes from storage tank, main component is compound in triazine class, CNOOC Energy Development Co.,Ltd) through circulating pump, from rotary packed bed liquid phase entrance, input, the natural gas of sulfide hydrogen 120ppm is inputted from rotary packed bed gas phase entrance, hydrogen sulfide scavenger is reacted with the hydrogen sulfide in unstripped gas, 28 ℃ of the temperature of reaction, reaction pressure is 6Mpa, hydrogen sulfide containing unstripped gas tolerance is 10000Nm
3/ d, gas-liquid volume ratio is 1000:1, rotary packed bed (RPB) rotor diameter 800mm, internal diameter 220mm, rotor height 100mm, rotary packed bed (RPB) rotating speed 800rpm, the natural gas after purification flows out from rotary packed bed gaseous phase outlet; Adopt iodimetric titration to detect the hydrogen sulfide content of purified natural gas, result is 1ppm.Hydrogen sulfide scavenger after absorbing hydrogen sulphide gas flows out and is input to storage tank from rotary packed bed liquid-phase outlet and recycles.
Hydrogen sulfide scavenger can adopt compound in triazine class or organic amine, experiment showed, with the GLT-203 that the ST1122 that methyl diethanolamine or Clariant company produce substitutes in the present embodiment and also can reach the effect similar to the present embodiment.
When the pH value of the hydrogen sulfide scavenger after the absorbing hydrogen sulphide gas in storage tank is less than 8, change hydrogen sulfide scavenger, its method can adopt two storage tanks.
Claims (5)
1. hydrogen sulfide scavenger circulation absorbs a method for hydrogen sulfide in unstripped gas, it is characterized in that comprising the steps:
To come from liquid phase entrance (3) input from rotary packed bed (1) through circulating pump (7) of the hydrogen sulfide scavenger as absorbent of storage tank (2), hydrogen sulfide containing unstripped gas is inputted from rotary packed bed gas phase entrance (4), hydrogen sulfide scavenger is reacted with the hydrogen sulfide in unstripped gas, and the unstripped gas after purification is exported from rotary packed bed gaseous phase outlet (5); Hydrogen sulfide scavenger after absorbing hydrogen sulphide gas flows out and is input to storage tank (2) from rotary packed bed liquid-phase outlet (6) and recycles.
2. a kind of hydrogen sulfide scavenger circulation according to claim 1 absorbs the method for hydrogen sulfide in unstripped gas, when the pH value that it is characterized in that the hydrogen sulfide scavenger after the absorbing hydrogen sulphide gas when storage tank (2) in is less than 8, and replacing hydrogen sulfide scavenger.
3. a kind of hydrogen sulfide scavenger circulation according to claim 1 and 2 absorbs the method for hydrogen sulfide in unstripped gas, it is characterized in that the temperature of reaction is-30 ℃～90 ℃, and reaction pressure is 0.1Mpa-6.0Mpa, and hydrogen sulfide containing unstripped gas tolerance is 5000-16000Nm
3/ d, gas-liquid volume ratio is 50:1-1000:1.
4. a kind of hydrogen sulfide scavenger circulation according to claim 1 and 2 absorbs the method for hydrogen sulfide in unstripped gas, it is characterized in that described unstripped gas is natural gas, accompanying gas with crude oil or water-gas.
5. a kind of hydrogen sulfide scavenger circulation according to claim 1 and 2 absorbs the method for hydrogen sulfide in unstripped gas, it is characterized in that described hydrogen sulfide scavenger is GLT-203, methyl diethanolamine, HW-700, ST1122 or ST1248.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105349194A (en) * | 2014-08-18 | 2016-02-24 | 中国石油化工股份有限公司 | Offshore platform hypergravity desulphurization apparatus and method thereof |
| US20190016966A1 (en) * | 2017-07-13 | 2019-01-17 | Ecolab Usa Inc. | Hydrogen sulfide scavengers |
| US10196343B2 (en) | 2013-01-30 | 2019-02-05 | Ecolab Usa Inc. | Hydrogen sulfide scavengers |
| US10308886B2 (en) | 2015-04-22 | 2019-06-04 | Ecolab Usa Inc. | Development of a novel high temperature stable scavenger for removal of hydrogen sulfide |
| US10336950B2 (en) | 2016-07-29 | 2019-07-02 | Ecolab Usa Inc. | Antifouling and hydrogen sulfide scavenging compositions and methods |
| US10407626B2 (en) | 2015-09-08 | 2019-09-10 | Ecolab Usa Inc. | Hydrocarbon soluble/dispersible hemiformals as hydrogen sulfide scavengers |
| US10584286B2 (en) | 2015-09-08 | 2020-03-10 | Ecolab Usa Inc. | Hydrogen sulfide scavengers |
| CN112725040A (en) * | 2020-12-30 | 2021-04-30 | 黑龙江建龙化工有限公司 | Application of novel complex iron in gas purification |
| US11499108B2 (en) | 2019-01-23 | 2022-11-15 | Championx Usa Inc. | Complete removal of solids during hydrogen sulfide scavenging operations using a scavenger and a Michael acceptor |
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| US11499108B2 (en) | 2019-01-23 | 2022-11-15 | Championx Usa Inc. | Complete removal of solids during hydrogen sulfide scavenging operations using a scavenger and a Michael acceptor |
| CN112725040A (en) * | 2020-12-30 | 2021-04-30 | 黑龙江建龙化工有限公司 | Application of novel complex iron in gas purification |
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Application publication date: 20140402 |