CN104815525A - Treating agent for mixing acid components in mixed gases - Google Patents
Treating agent for mixing acid components in mixed gases Download PDFInfo
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- CN104815525A CN104815525A CN201510255515.0A CN201510255515A CN104815525A CN 104815525 A CN104815525 A CN 104815525A CN 201510255515 A CN201510255515 A CN 201510255515A CN 104815525 A CN104815525 A CN 104815525A
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Abstract
The invention relates to a treating agent for acid components in mixed gases. The treating agent comprises a composition containing hydramine and amide or a water solution. The treating agent is used for removing and purifying the acid components in the mixed gases, can be applied to the gas treatment processes in the fields such as natural gas extraction, chemical fertilizer gas synthesis, petrochemical production and room-temperature gas recovery.
Description
Technical field
The present invention relates to a kind of inorganic agent for acidic components in mist, comprise a kind of containing hydramine, the composition of acid amides or the aqueous solution, its removing and purifying for acidic components in mist, can be applicable to the gas treating process in the fields such as natural gas, chemical fertilizer synthesis gas, petrochemical iy produced, greenhouse gases recovery.
Background technology
At present, usually the acidic components such as carbon dioxide, hydrogen sulfide are contained in the process gas that natural gas, chemical fertilizer synthesis gas, oil plant, greenhouse gases reclaim.The method removing acid gas components has a lot, and MDEA decarbonization process is a kind of de-CO based on the N methyldiethanol amine aqueous solution of early 1970s BASF AG's exploitation
2technique.This technique in investment, public work, supplies consumption, expense etc. with other de-CO
2it is very economical that method is compared, and has very strong competitiveness.The method be current lowest energy consumption remove CO
2one of method.Over nearly 30 years, this solvent system has been successfully applied to many commercial plants.
Because MDEA is to absorption CO
2have many good qualities, as thermal energy consumption is low, absorbability is large, and degree of purification is high, does not corrode carbon steel, and vapor partial pressure is low, and solvent loss is little, but because it is tertiary amine, absorbs CO
2speed is slow.Therefore, all adopt primary amine and secondary amine as activator this area researcher, improve the infiltration rate of solution, but with which kind of primary, secondary amine, concentration is how many, its various pros and cons are how, are all mains direction of studying of researcher, mainly comprise: improve speed how, the stability, side reaction, corrosivity, vapor partial pressure, loss etc. of various brothers amine.
United States Patent (USP) 4997630 discloses the aqueous solution removing CO that a kind of use comprises N methyldiethanol amine
2and/or H
2
The method of S.The inorganic agent of the method contains 0.05-1mol/L, the piperazine of preferred 0.1-0.8mol/L.
China ZL93110579.X has invented the aqueous solution using and comprise N methyldiethanol amine, and it is suitable for having sulphur, different situations without sulphur.Wherein be suitable for sweet gas body: N methyldiethanol amine 20-60%(weight), piperazine 1-5%(weight), diethanol amine 1-10%(weight).Be suitable for there is sulphur gas: N methyldiethanol amine 20-60%(weight), 2-Methylaminoethanol 0.1-10%(weight), piperazine 1-5%(weight) or diethanol amine 1-10%(weight).
Chinese patent ZL92113637.4 discloses and a kind of adopts tertiary alkanolamine compounds 0-60%(weight), the mixture 2-30%(weight of alkylene amines or alkylene amines and alkanol amine), corrosion inhibiter 0.2-1.2%(weight) the aqueous solution, for removing CO from mist
2.
Chinese patent ZL 200510095344.6 discloses a kind of solvent for removing hydrogen sulfide and carbon dioxide simultaneously and method, belongs to gas purification technique field.Adopt some amine with special construction and MDEA to form mixed aqueous solution, use these mixed aqueous solutions to contact with processed gas, the advantage of traditional MDEA mixed solvent can be kept, overcome again their shortcoming simultaneously.The method cost is higher.
Therefore, although N methyldiethanol amine method (MDEA method) is best suited for commercial plant in the middle of prior art, there is plurality of advantages, still have and need improvements, to reach process high-load sour gas, particularly as CO
2volume content>=20%, H
2s content>=3%, even higher situation.Also be faced with reducing the inorganic agent renewable sources of energy further and consuming of task simultaneously.
Diglycolamine, 1-METHYLPYRROLIDONE, N-N-formyl morpholine N-, sulfolane, triethanolamine are fine solvents.Its aqueous solution is less than 0.01 mm every year 170 DEG C of corrosivity to carbon steel equipment, to stainless steel and aluminium copper non-corrosiveness.Heat stability is good, does not decompose under high temperature.Nontoxic, to the biological non-toxicity effect of purification of waste water unit.Dissolve each other completely when mixing in any proportion with water, with C
9-C
10appoint a class do not form any azeotropic mixture.To H
2s sulfides, CO
2and H
2o has very strong compatibility.Therefore, these sour gas in gas phase, after liquid absorbent, are easy to be absorbed, and are current comparatively ideal absorbents.Diglycolamine, 1-METHYLPYRROLIDONE, N-N-formyl morpholine N-, sulfolane, triethanolamine is adopted to have that the power of removing is strong, wide adaptability, removal efficiency are high, to series of advantages such as hydrocarbon solubility are little as removing acid gas solvent.Diglycolamine, 1-METHYLPYRROLIDONE, N-N-formyl morpholine N-, sulfolane, the stability of triethanolamine to heat are high, and pyroconductivity is large, and be conducive to regenerating in production process, comprehensive energy consumption is low.Can reduce investment outlay, make easy and simple to handle and reduce operating cost.It is the ideal carrier that natural gas removes the acidic components contained.
Summary of the invention
The object of the invention is to adopt and there is hydramine, acid amides, the amine of circulus specific functional groups of NO atom and sulfolane be combined into Sour gas disposal agent, continue to use N methyldiethanol amine method technique, can reduce investment outlay, make easy and simple to handle and reduce operating cost, can realize having that the power of removing is strong, wide adaptability, removal efficiency are high, to series of advantages such as hydrocarbon solubility are little.
Inorganic agent involved in the present invention by main absorbent components, help absorbent components, water forms.
Wherein main absorbent components is diglycolamine, 1-METHYLPYRROLIDONE, N-N-formyl morpholine N-, triethanolamine, and these 4 kinds of components can independently use or used in combination, but total content is in 30-80%(quality).
Wherein help absorbent components to comprise N-ethylmorpholine, sulfolane, these 2 kinds of components can independently use or used in combination, but total content is in 3-10%(quality).The effect of absorbent components is helped to be the performance deficiency making up main absorbent components.
In inorganic agent in the present invention, surplus component is water.
It is 0-90 DEG C that inorganic agent of the present invention absorbs sour gas temperature range, and regeneration temperature range is 0-90 DEG C
Effect of the present invention and advantage be, inorganic agent disposal ability involved in the present invention is large, can process high-load sour gas, absorb, desorption temperature be low, operating power consumption is low, selective good, product gas quality is high.
Specific embodiments
The present invention can implement according to typical process flow below.
The unstripped gas of acid gas-containing component, is entered the absorption tower that filler or tower tray are housed by bottom, absorb inorganic agent from tower top pouring, carry out counter-current absorption with unstripped gas, the pure qi (oxygen) after purification is drawn from absorption tower top.Containing the absorption inorganic agent of acidic components, discharge at the bottom of absorbing tower, and heat through heat exchanger, then enter in separator, separate section acidic components, acid gas components sends to further process.
The absorption inorganic agent flowed out in separator, takes off acid gas components further in desorber.From tower top rich acid flow out after cooling, condensation, carry out gas-liquid separation in the separator, liquid backflow, gas sends to further processing.The absorption inorganic agent flowed out from desorber bottom, recycles to required temperature through cools down.
Unstripped gas is the high-carbon content natural gas containing carbon dioxide 18.5%, hydrogen sulfide 3%.
Experimental provision absorption tower internal diameter 50mm, in-built ф 6 × 6 stainless steel θ ring, regenerator internal diameter 65mm, in-built ф 6 × 6 stainless steel θ ring, bottom regenerator, reboiler is housed, condenser is equipped with at top, and electric tracing is all equipped with in absorption tower, regenerator.Gas product is the emptying of high point after inspection.Inorganic agent internal circulating load 20L/ hour.Raw gas flow 2M
3/ hour.
In process of the test, prepare the inorganic agent of different ratio, its actual constituent is listed in the table below:
In process of the test, the inorganic agent actual test effect preparing different ratio is listed in the table below:
Claims (5)
1. for an inorganic agent for acidic components in mist, for the acidic components process in gas generation technical process.It is characterized in that: inorganic agent by main absorbent components, help absorbent components, water forms.Wherein main absorbent components is diglycolamine, 1-METHYLPYRROLIDONE, N-N-formyl morpholine N-, triethanolamine, helps absorbent components to comprise N-ethylmorpholine, sulfolane.
2. a kind of inorganic agent for acidic components in mist according to claim 1, is characterized in that in mist, acidic components are carbon dioxide, hydrogen sulfide.
3. a kind of inorganic agent for acidic components in gas generation technical process according to claim 1, it is characterized in that wherein main absorbent components is diglycolamine, 1-METHYLPYRROLIDONE, N-N-formyl morpholine N-, triethanolamine, these two kinds of components can independently use or used in combination, but total content is in 30-80%(quality).
4. a kind of inorganic agent for acidic components in gas generation technical process according to claim 1, it is characterized in that wherein helping absorbent components to comprise N-ethylmorpholine, sulfolane, these three kinds of components can independently use or used in combination, but total content is in 3-10%(quality).
5. a kind of inorganic agent for acidic components in gas generation technical process according to claim 1, is characterized in that wherein surplus component is water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510255515.0A CN104815525A (en) | 2015-05-19 | 2015-05-19 | Treating agent for mixing acid components in mixed gases |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510255515.0A CN104815525A (en) | 2015-05-19 | 2015-05-19 | Treating agent for mixing acid components in mixed gases |
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ID=53726149
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107398148A (en) * | 2017-09-20 | 2017-11-28 | 珠海蓝天环保科技有限公司 | Industrial waste gas inorganic agent and preparation method thereof |
| CN107464669A (en) * | 2017-09-26 | 2017-12-12 | 绵阳鑫阳知识产权运营有限公司 | The conservator tracheae of service life of transformer oil can be extended |
| CN107715651A (en) * | 2017-10-17 | 2018-02-23 | 华南理工大学 | A kind of efficient low damage solvent for being used to absorb toluene and flow |
| CN108295622A (en) * | 2018-01-30 | 2018-07-20 | 郝天臻 | Composite desulfurizing agent and the method that deep desulfuration is carried out to sulfurous gas |
| CN110917857A (en) * | 2019-12-13 | 2020-03-27 | 陕西速源节能科技有限公司 | Industrial waste gas treatment reagent |
| CN113663450A (en) * | 2021-09-08 | 2021-11-19 | 昆明理工大学 | Deep purification process for industrial silicon smelting flue gas |
-
2015
- 2015-05-19 CN CN201510255515.0A patent/CN104815525A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107398148A (en) * | 2017-09-20 | 2017-11-28 | 珠海蓝天环保科技有限公司 | Industrial waste gas inorganic agent and preparation method thereof |
| CN107464669A (en) * | 2017-09-26 | 2017-12-12 | 绵阳鑫阳知识产权运营有限公司 | The conservator tracheae of service life of transformer oil can be extended |
| CN107715651A (en) * | 2017-10-17 | 2018-02-23 | 华南理工大学 | A kind of efficient low damage solvent for being used to absorb toluene and flow |
| CN108295622A (en) * | 2018-01-30 | 2018-07-20 | 郝天臻 | Composite desulfurizing agent and the method that deep desulfuration is carried out to sulfurous gas |
| CN110917857A (en) * | 2019-12-13 | 2020-03-27 | 陕西速源节能科技有限公司 | Industrial waste gas treatment reagent |
| CN113663450A (en) * | 2021-09-08 | 2021-11-19 | 昆明理工大学 | Deep purification process for industrial silicon smelting flue gas |
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Application publication date: 20150805 |
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