CN105727715B - A kind of Acidic Gas Treating technique and system - Google Patents
A kind of Acidic Gas Treating technique and system Download PDFInfo
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- CN105727715B CN105727715B CN201410732125.3A CN201410732125A CN105727715B CN 105727715 B CN105727715 B CN 105727715B CN 201410732125 A CN201410732125 A CN 201410732125A CN 105727715 B CN105727715 B CN 105727715B
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Abstract
The present invention provides a kind of Acidic Gas Treating technique and system, and the technique, by two-stage gas liquid reaction and one-level reactive liquid solution process, realizes tail gas qualified discharge, and produce the chemical products for meeting national product quality standard using sodium hydroxide as absorbent.Acidic Gas Treating system of the present invention includes the 1st processor, the 2nd processor, alkali lye blending tank and process pipelines and pump is formed.The present invention can realize the double goal of sour gas purification and pollutant resources.
Description
Technical field
The present invention relates to Acidic Gas Treating technique and system, belong to field of chemical engineering, suitable for petrochemical industry acid
The comprehensive utilization of property gas, be particularly suitable for use in the purification containing high concentration hydrogen sulfide gas, realizes the recycling treatment side of pollutant
Method and process units.
Background technology
Element sulphur is prevalent in fossil fuel, when oil enters fine fractionation with deep-processing process, is formed with hydrogen
Hydrogen sulfide gas, the process is toward contact association carbon dioxide, ammonia etc..There is also element sulphur in the raw material of metallurgy industry,
But because its process is mostly worst hot case, element sulphur is oxidized, and mainly generates sulfur dioxide sour gas.It is other to produce acidity
The operating mode of gas mostly occurs uses process in chemical process or chemical products.
The sour gas of petroleum chemical industry mostlys come from natural gas extraction, associated gas, coal chemical industry, oil-refining chemical row
Industry.Can have a negative impact again to follow-up processing during the energy is processed（As catalyst poisoning, pipeline are rotten
Erosion）, it is therefore necessary to control the sulfur content in raw materials technology and product.During desulfurization element sulphur in the form of hydrogen sulfide from
The process system that goes into operation discharges into outside to be burned into boiler, is discharged into air in the form of sulphur dioxide.China's flue gas desulfurization technique starting is compared
Evening, desulfuration byproduct utilization rate are lower.Stacked so most desulfuration byproducts are idle, take large amount of land resources and make
Into secondary pollution.And use desulfurizing agent circular regeneration to use, the desulfurization technology of recovery Sulphur ressource, its reclaim product be elemental sulfur and
Sulfuric acid etc., industrial chemicals can be used as, for other sulfur removal technologies, it, which reclaims product, there are more preferable market prospects.
The processing of China's sour gas, mainly prepares sulphur using sour gas, and more commonly used at present has two kinds of works
Skill technology, one kind are two level claus process combination tail gas hydrogenation reducing process, and solvent absorption process technology.Another technique
Technology is the LO-CAT technologies of gas technology Products Co., Ltd of Merichem companies of U.S. exploitation.
Crouse's sulphur recovery technology have passed through it is a series of development and it is perfect, formd a more huge skill
Art system.Initial Claus method is that hydrogen sulfide and oxygen are first mixed, and catalysis oxidation generation is single in a certain temperature conditions
Matter sulphur.Original Claus method is mainly characterized by, using air as oxidant, reacting and carrying out in a fixed bed adiabatic reactor.
German method our company is improved to original Claus method within 1938, and the oxidation reaction of hydrogen sulfide is divided into two ranks
Duan Jinhang：First stage is that 1/3 Oxidation of Hydrogen Sulfide is sulfur dioxide, reaction heat Steam Recovery；Second stage is residue 2/3
Hydrogen sulfide and sulfur dioxide reaction generation elemental sulfur.This technological innovation solves original 3 problems of Claus method：When gram
Louth reacting furnace is mainly the reaction that Oxidation of Hydrogen Sulfide is sulfur dioxide, it is not necessary to maintains low reaction temperature；Second, 80% it is anti-
Heat is answered to reclaim, way of recycling is steam；Third, the treating capacity of hydrogen sulfide improves 50 times than original Claus method.This skill
Art is referred to as improveing Claus method.In actual applications, form and meet increasingly strict two to adapt to different sour gas
Sulfur oxide emissions requirement, improvement Claus method form four kinds of basic technical process：Direct current method, shunting, sulfur cycle method and
Direct oxidation method.
Improvement Claus method is called Crouse's technology for short, or is referred to as classical Claus method.Claus method is as existing
Modern most widely used sulphur recovery technology, people have done substantial amounts of research to this technology.Oxygen-enriched gram is proposed on this basis
Louth technology, super Claus technology（Super Claus99）, super excellent Crouse's technology（Super Claus99.5）Deng.
So far, the processing most important means of hydrogen sulfide are hydramine method absorption technique and Claus unit sulfur recovery unit, especially
After super Claus Sulfur Recovery Technique exploitation, the removal efficiency of hydrogen sulfide has reached more than 99% for it.At present, the method at home and abroad obtains
To extensive use.
LO-CAT techniques make hydrogen sulfide be converted into elementary sulfur, the removing of hydrogen sulfide using the iron catalyst of multicomponent chelate
Rate is more than 99.9%.LO-CAT techniques can be adapted to the fluctuation of acid tolerance larger, and hydrogen sulfide content 0~100% it is various
Operating mode, raw material condition of compatibility is wide in range, adapts to the actual conditions of sour gas fluctuating change.And LO-CAT liquid redox technical office
Reason scheme will not produce any harmful exhaust gas by-products without using any poisonous chemicals, environmentally safe
Catalyst can be constantly regenerating in processing procedure.The stability and economic benefit of LO-CAT sulfur removal technologies operation depend primarily on
The stability of doctor solution and the consumption of chemicals.According to its different stability that complex compound is formed between iron ion and complexing agent
Also different characteristics, LO-CAT have selected different complexing agents to configure complexing ferrous solution, the generation for preventing ferrous sulfide from precipitating.
LO-CAT technology features are that technological process is simple, and operating flexibility is big, and floor space is small, first investment cost
It is low；But operating cost is too high, chemical solvent consumption is big, is not suitable for larger desulfurizer, iron content waste water is difficult, sulphur
Product quality is not high.LO-CAT techniques foreign countries are directed generally to reduce production cost, reduce equipment size and improve sulphur
Quality etc..Domestic aspect, dominant catalyst used in LO-CAT techniques and other chemical agents are import, associated catalysts
Research work also in starting stage LO-CAT catalyst research and development also need put into extensive work.
Sulfuric acid is widely used in all trades and professions as one of basic industrial chemicals.Made with the hydrogen sulfide contained in sour gas
For raw material, many processing steps can be saved, that is, saves investment, reduces cost again, can also effectively recycle sulphur
Resource.Because small-sized sour gas tolerance is smaller, the industrial sulphuric acid of low concentration can only be produced, it is impossible to which productive value is higher
Oleum, economic benefit is not high, simultaneously as the transport of sulfuric acid, storage acquire a certain degree of difficulty, it is therefore, steady near oil plant
The fixed market demand is an important factor for limiting its development.Patent CN101143714A discloses a kind of acidity using high hydrocarbon-containing
The method that gas prepares sulfuric acid, acid hydrogen sulfide gas respectively enters in proportion to burn in first, second sulfureted hydrogen burning stove, from
The high-temperature furnace gas that one combustion furnace comes out, by burner-gas cooler, certain temperature is cooled to by air, subsequently into the second combustion furnace
Continue and the combust of surplus air one in furnace gas, the high-temperature furnace gas of the second combustion furnace out with the sulfide hydrogen sour gas of supplement
Into waste heat boiler heat accumulation, enter back into purification section, conversion section, dry absorption section and carry out conventional relieving haperacidity.This process can only
Produce 98% industrial sulphuric acid, it is impossible to the higher oleum of productive value, simultaneously as the transport of sulfuric acid, storage have certain difficulty
Degree, therefore, the stable market demand is an important factor for limiting its development near oil plant.
The comprehensive utilization of sour gas, can use the less absorption process sulfur removal technology technology of investing, the technology using alkaline agent as
Absorbent, vulcanization hydrogen retrieval is prepared into sulphite.Sour gas is carried out burning generation sulfur dioxide by the technology, is then fed into suction
Receive tower and carry out chemical absorbing generation sulfite solution, then solution and alkaline absorbent are reacted, prepare the production of sulphite liquid
Product, or generation sulphite crystal, sulphite solid product is prepared into through the process such as separating, drying.The process unit
Flow is shorter, and reaction is simple, and operating flexibility is big, is applicable to the sour gas operating mode of medium and small tolerance, and tolerance fluctuation was to producing
Journey can select different absorbents to produce difference without influence by selecting different processes to produce solid or fluid product
The sulphite of type, and tail gas qualified discharge is realized by three sections of absorptions, realize the purpose of cleaning of off-gas.But actual production
Have that equipment corrosion is serious in journey, the higher determination of maintenance cost.
The comprehensive utilization of sour gas, it can also use and invest less novel absorbent method sulfur removal technology technology, produce chemical industry
Product akali sulphide.Akali sulphide is widely used in the industry such as ore dressing, agricultural chemicals, dyestuff, tanning production and organic synthesis.Wherein, contaminate
NaHS is used to synthesize organic intermediate and prepares the auxiliary agent of sulfur dye in material industry；Leather industry is used for the depilation of rawhide
And tanning, routinely soaked applied to leather industry, energy uniform loose's cladding fibr tissue, cladding is slowly expanded, have bright
Aobvious crease-resistant and raising leather yield effect, and the color of cladding indigo plant skin is can ensure that, ensure the sense organ and quality of cladding；Chemical fertilizer industry
Middle NaHS can be used for sloughing the free sulfur in activated carbon desulphurization agent；It is manufacture ammonium sulfide and agricultural chemicals ethyl mercaptan in pesticide industry
The raw material of semi-finished product；NaHS is largely used to copper ore dressing in mining industry；It is used to sulfurous acid in staple fibre production dye
Etc.；NaHS can be additionally used in wastewater treatment.With increasingly harsh, the dosage of sulfur product commercially of environmental regulation
Reduce, price also increasingly drops, about 600 yuan/ton of Sulfur price, and the market price of vulcanized sodium is 2600 yuan/ton, NaHS
The market price be even more reach 3200 yuan/ton.
Low concentration solution product is produced using sour gas：Low concentration effectively avoids crystallizing, but solution product does not use valency
Value, it is necessary to carry out multistage evaporation concentration, energy consumption is very high, without economy.
Patent CN102515112 A《It is a kind of produced using viscose rayon in the hydrogen sulfide waste gas that produces prepare vulcanized sodium
Method》Spray-absorption, double flash evaporation and crystallisation by cooling process, the technology is set to produce the extremely low solution of concentration, stream be present
The problems such as journey is long, the low concentration product liquid of generation evaporates, concentration process high energy consumption.
Patent CN103466559 A《Continuous production technology of three kettle type sodium hydrosulfide》, using sodium hydroxide as absorbing liquid, use
Three-level counter-current absorption process, realize the continuous production of sodium hydrosulfide.The unstripped gas of the technology need to carry out removing titanium dioxide
The pretreatment of carbon, the problems such as long flow path, process units are complicated, particularly feed gas preprocessing energy consumption is very high, device complexity be present.
Patent CN101654226 A《The method of preparing alkali sulphide by using sulfur dye waste gas》, using hydrogen sulfide containing sulfur dye waste gas as original
Material, add alkali and reacted, generate akali sulphide.The technology production process is intermittently operated, alkaline agent and product low concentration be present, clearly
Cleaning device is numerous and diverse, produces waste water, example 3,4 is also easy to produce blocking, can not continuously generated, and solid waste be present.Patent
CN103495329 A《A kind of technique for removing hydrogen sulfide and Recovered sulphur》, hydrogen sulfide is removed by sewage stripping, sodium carbonate is inhaled
Hydrogen sulfide, rich solution the production sulphur foam under desulphurization catalyst effect are received, and filtering, molten sulphur production elemental sulfur four part are formed.Should
There is desulphurization catalyst costliness in technology, sulphur foam entrained catalyst causes sulphur product purity not high, there is the problems such as solid waste generation.
Sour gas is the mixed gas of hydrogen sulfide and carbon dioxide：In petrochemical industry, sour gas is usually sulphur
Change hydrogen, carbon dioxide mix body, using alkaline agent as absorbent, production vulcanized sodium or during sodium hydrosulfide product, it will usually formed
The materials such as vulcanized sodium, NaHS, sodium carbonate, sodium acid carbonate, when concentration reaches certain value, crystallization can be produced, causes device
Block and can not normally realize continuous production.
For the Acidic Gas Treating of petrochemical industry, also stay in that " basic reason utilized is that hydrogen sulfide is pole at present
The extensive thoughtcast of dangerous toxic gas, it is necessary to be used or convert ".At present, " efficiency multiplication, economy can hold
, it is necessary to the Acidic Gas Treating method of a kind of new " energy-conservation, consumption reduction, environmental protection " under the new demand of supervention exhibition ".
The content of the invention
In view of the shortcomings of the prior art, the present invention provides a kind of Acidic Gas Treating technique and system, acid suitable for refinery
The processing of gas, be particularly suitable for use in H containing high concentration2The purification of S gases, the recycling of sour gas purification and pollutant can be realized
Double goal.Compared with prior art, there is the spies such as flow is simple, device is intensive, energy-saving, the small and small investment of occupation of land
Point,
In order to solve the above technical problems, the present invention provides a kind of Acidic Gas Treating technique, the technique using sodium hydroxide as
Absorbent, by two-stage gas liquid reaction and one-level reactive liquid solution process, tail gas qualified discharge is realized, and produce and meet national product
The chemical products of quality standard；The technique includes：
Using the 1st processor, it is used to receiving and handling sour gas, and the 1st stream and liquid phase of gas phase are obtained after processing
2nd stream, the 2nd stream is divided into four the 21st stream, the 22nd stream, the 23rd stream and the 24th stream sub-streams, wherein by
21 streams are recycled to the 1st processor and are used to form liquid film, and the 22nd stream is recycled into the 1st processor as absorbing liquid uses, will
23rd stream is discharged as product；
Using the 2nd processor, it is used to handle the lack of gas from lack of gas suction line and the 1st material from the 1st processor
The gaseous mixture of stream, obtain the 3rd stream of gas phase and the 4th stream of liquid phase；By the 4th stream be divided into the 41st stream, the 42nd stream and
43rd sub-stream of stream three, is used wherein the 41st stream is back in the 1st processor as absorbing liquid, described for handling
Sour gas；42nd stream is recycled into the 2nd processor as absorbing liquid to use, the 43rd stream is recycled into the 2nd processor makees
Used for protection liquid；
Using alkali lye blending tank, it is used to receive the 24th stream from the 1st processor, and from alkali liquor inlet pipeline
Sodium hydroxide solution hybrid reaction, the 5th stream of liquid phase is obtained, the 5th stream is returned into the 2nd processor uses as absorbing liquid.
In present invention process, the sour gas includes hydrogen sulfide and carbon dioxide.
In present invention process, the reaction temperature of the 1st processor and the 2nd processor is 70~100 DEG C, preferably 80~
95℃。
In present invention process, the lack of gas are the arbitrary gas not reacted with sour gas and NaOH solution, specially low pressure
Any of device in Gas, nitrogen, inert gas.The volume flow of the lack of gas and the sour gas at sour gas suction line
Volume flow ratio is 1:1~3:1, preferably 1.5:1~2:1.
In present invention process, in the 1st processor and the 2nd processor, the liquid-gas ratio of absorbing liquid and sour gas for 3~
20L/m3, preferably 5~10 L/m3。
In present invention process, step（3）Described in the 24th stream in alkali lye blending tank volume flow and sodium hydroxide
The volume flow proportion of solution is 3/1~1/1.
In present invention process, the volume flow of the 21st stream accounts for the 3%~10% of the 2nd stream total volumetric flow rate, preferably
5%~7%；The volume flow of 22nd stream accounts for the 50%~80% of the 2nd stream total volumetric flow rate, preferably 60%~70%, the 23rd stream
Volume flow account for the 10%~20% of the 2nd stream total volumetric flow rate, preferably 10%, it is total that the volume flow of the 24th stream accounts for the 2nd stream
The 10%~30% of volume flow, preferably 13%~25%.
In present invention process, the volume flow of the 41st stream accounts for the 20%~40% of the 4th stream total volumetric flow rate, preferably
30%~35%, the volume flow of the 42nd stream accounts for the 50%~80% of the 2nd stream total volumetric flow rate, preferably 60%~70%, the 43rd material
The volume flow of stream accounts for the 5%~25% of the 4th stream total volumetric flow rate, preferably 8%~15%.
In present invention process, sodium hydroxide solution mass concentration is 20%~60%, preferably 32%~45%.
In present invention process, the 1st processor, the 2nd processor are venturi reactor, the reactor by it is upper, in,
Lower three sections of compositions, wherein, epimere is liquid film generator tube, and stage casing is reaction tube, and hypomere is gas-liquid separation pipe, and the liquid film occurs
Pipe, reaction tube, gas-liquid separation pipe go to upper and lower and are connected in series, and are arranged for same axis；
The liquid film generator tube is made up of outer cylinder body, inner barrel, upper annular closure disk and lower annular closure disk, and liquid film occurs
Opened up on the inner barrel of pipe and be provided with gas phase entrance and liquid phase thing in horizontal, some liquid channels of annular spread, liquid film generator tube
Expect entrance；
The reaction tube is from top to bottom followed successively by feed zone, contraction section, trunnion section, expansion segment and discharging section, the reaction
The feed zone upper end of pipe is connected with the inner barrel lower end of liquid film generator tube, and the tube wall of reaction tube is provided with absorbing liquid entrance, absorbing liquid
Entrance is located at trunnion section top；
The gas-liquid separation pipe is made up of upper cover plate, gas-liquid separation pipe inner barrel, gas-liquid separation pipe outer cylinder body and bottom plate；
The inner barrel top of gas-liquid separation pipe and the discharging section lower end of reaction tube connect, and gas-liquid separation pipe is provided with gaseous phase outlet and liquid phase goes out
Mouthful.
In above-mentioned reactor, the liquid film generator tube is provided with gas phase entrance and liquid phase material entrance, and the gas phase entrance is set
Put and be arranged on the side wall of the outer cylinder body of liquid film generator tube in the upper end of the inner barrel of liquid film generator tube, the liquid phase material entrance
On.
In above-mentioned reactor, the liquid channel is one kind in triangle, circle, strip or continuous annular space, preferably
For continuous annular space.The gross area of liquid channel is the liquid phase material entrance cross-section of absorbing reaction device on liquid film generator tube inner barrel
Long-pending 1~12 times, preferably 3~5 times.
In above-mentioned reactor, the absorbing liquid entrance connection liquid phase distributor of the reaction tube, liquid phase distributor is arranged on instead
Answer on tube hub line, spray absorbing liquid from top to bottom, liquid phase distributor is settable 1~10, preferably 4~6.
In above-mentioned reactor, the inner barrel bottom of the gas-liquid separation pipe opens up teeth groove, and tooth slot structure is fan-shaped teeth groove, side
Shape teeth groove, triangle teeth groove, preferably lance tooth slot structure, space width are 3mm~20mm, preferably 5mm~8mm；Its bottom
Portion's angle is 15~90 °, preferably 30~60 °.
In above-mentioned reactor, the gas-liquid separation pipe is provided with gaseous phase outlet and liquid-phase outlet, and gaseous phase outlet is arranged on gas-liquid
In the side wall of the outer cylinder body of separating pipe, and the position of gaseous phase outlet is higher than the lower end outlet of the inner barrel of gas-liquid separation pipe, liquid phase
Outlet is positioned at the bottom of the outer cylinder body of gas-liquid separation pipe.
In above-mentioned reactor, the gas-liquid separation pipe of the 2nd processor is provided with treatment fluid entrance, and treatment fluid entrance is arranged on
In the side wall of the outer cylinder body of gas-liquid separation pipe, and the position for the treatment of fluid entrance is less than the lower end outlet of the inner barrel of gas-liquid separation pipe
Position.
The present invention provides a kind of Acidic Gas Treating system, and the system is mixed including the 1st processor, the 2nd processor and alkali lye
Close tank；
1st processor, the gas phase entrance of the 1st processor are connected with sour gas suction line, and it is used to receive and located
Sour gas is managed, the 1st stream of gas phase and the 2nd stream of liquid phase are obtained after processing, the 2nd stream is divided into the 21st stream, the 22nd material
Four stream, the 23rd stream and the 24th stream sub-streams, the 21st stream are circulated through pipeline by the liquid phase material entrance of the 1st processor
To the 1st processor, the 22nd stream is recycled to the 1st processor, the 23rd stream warp through pipeline by the absorbing liquid entrance of the 1st processor
Pipeline is connected with products pot, and the 24th stream is connected through pipeline with the liquid phase entrance of alkali lye blending tank；
2nd processor, it is used to handle the lack of gas from lack of gas suction line and the 1st stream from the 1st processor
Gaseous mixture, obtain the 3rd stream of gas phase and the 4th stream of liquid phase；4th stream is divided into the 41st stream, the 42nd stream and the 43rd
Three sub-streams of stream, the 3rd stream are discharged by the purified gas discharge pipe line of gaseous phase outlet of the 2nd processor, the 41st stream warp
Pipeline is recycled to the 1st processor, suction of the 42nd stream through pipeline by the 2nd processor by the absorbing liquid entrance of the 1st processor
Receive liquid entrance and be recycled to the 2nd processor, the 43rd stream is recycled at the 2nd through pipeline by the liquid phase material entrance of the 2nd processor
Manage device；
Alkali lye blending tank, it is used to receive the 24th stream from the 1st processor, with the hydrogen-oxygen from alkali liquor inlet pipeline
Change sodium solution hybrid reaction, obtain the 5th stream of liquid phase, the 5th stream is returned through pipeline by the treatment fluid entrance of the 2nd processor
Return the 2nd processor.
In Acidic Gas Treating system of the present invention, the 1st processor, the 2nd processor are venturi reactor, the reaction
Device is made up of upper, middle and lower segment, wherein, epimere is liquid film generator tube, and stage casing is reaction tube, and hypomere is gas-liquid separation pipe, described
Liquid film generator tube, reaction tube, gas-liquid separation pipe go to upper and lower and are connected in series, and are arranged for same axis；
The liquid film generator tube is made up of outer cylinder body, inner barrel, upper annular closure disk and lower annular closure disk, and liquid film occurs
Opened up on the inner barrel of pipe and be provided with gas phase entrance and liquid phase thing in horizontal, some liquid channels of annular spread, liquid film generator tube
Expect entrance；
The reaction tube is from top to bottom followed successively by feed zone, contraction section, trunnion section, expansion segment and discharging section, the reaction
The feed zone upper end of pipe is connected with the inner barrel lower end of liquid film generator tube, and the tube wall of reaction tube is provided with absorbing liquid entrance, absorbing liquid
Entrance is located at trunnion section top；
The gas-liquid separation pipe is made up of upper cover plate, gas-liquid separation pipe inner barrel, gas-liquid separation pipe outer cylinder body and bottom plate；
The inner barrel top of gas-liquid separation pipe and the discharging section lower end of reaction tube connect, and gas-liquid separation pipe is provided with gaseous phase outlet and liquid phase goes out
Mouthful.
In above-mentioned reactor, the liquid film generator tube is provided with gas phase entrance and liquid phase material entrance, and the gas phase entrance is set
Put and be arranged on the side wall of the outer cylinder body of liquid film generator tube in the upper end of the inner barrel of liquid film generator tube, the liquid phase material entrance
On.
In above-mentioned reactor, the liquid channel is one kind in triangle, circle, strip or continuous annular space, preferably
For continuous annular space.The gross area of liquid channel is the liquid phase material entrance cross-section of absorbing reaction device on liquid film generator tube inner barrel
Long-pending 1~12 times, preferably 3~5 times.
In above-mentioned reactor, the absorbing liquid entrance connection liquid phase distributor of the reaction tube, liquid phase distributor is arranged on instead
Answer on tube hub line, spray absorbing liquid from top to bottom, liquid phase distributor is settable 1~10, preferably 4~6.
In above-mentioned reactor, the inner barrel bottom of the gas-liquid separation pipe opens up teeth groove, and tooth slot structure is fan-shaped teeth groove, side
Shape teeth groove, triangle teeth groove, preferably lance tooth slot structure, space width are 3mm~20mm, preferably 5mm~8mm；Its bottom
Portion's angle is 15~90 °, preferably 30~60 °.
In above-mentioned reactor, the gas-liquid separation pipe is provided with gaseous phase outlet and liquid-phase outlet, and gaseous phase outlet is arranged on gas-liquid
In the side wall of the outer cylinder body of separating pipe, and the position of gaseous phase outlet is higher than the lower end outlet of the inner barrel of gas-liquid separation pipe, liquid phase
Outlet is positioned at the bottom of the outer cylinder body of gas-liquid separation pipe.
In above-mentioned reactor, the gas-liquid separation pipe of the 2nd processor is provided with treatment fluid entrance, and treatment fluid entrance is arranged on
In the side wall of the outer cylinder body of gas-liquid separation pipe, and treatment fluid enters the position of implication less than being brought out under the inner barrel of gas-liquid separation pipe
The position of mouth.
In Acidic Gas Treating system of the present invention, the gaseous phase outlet of the 1st processor and the gas phase entrance of the 2nd processor connect
Hydrogen sulfide on-line computing model is set on adapter line, control valve is set on the alkali liquor inlet pipeline, monitored on-line by hydrogen sulfide
Instrument, detection are fluctuated into the concentration of hydrogen sulfide in the gas of the 2nd processor between 1000ppm~9000mmp, 4 ~ 20mA's of output
Continuous signal, set the regulation for sodium hydroxide solution inlet amount in alkali liquor inlet pipeline, the automated production of realization device
Process.
Compared with prior art, Acidic Gas Treating technique and system of the present invention have the following advantages that：
1st, Acidic Gas Treating technique and system of the present invention, the homogenizing of response intensity is realized using two-stage reaction, prevents from reacting
Heat is too high to cause NaHS to thermally decompose, and prevents excessive vaporization from causing Na2S is crystallized.
2nd, Acidic Gas Treating technique and system of the present invention, the 1st processor and the 2nd processor are using of the present invention
Venturi reactor, by setting liquid film generator tube, reaction generation liquid point is formed into liquid film in reactor wall all the way, liquid film exists
Separation layer is formed between reaction tube and reacting field：First effect is to prevent the H in sour gas2S、CO2Reacted with absorbing liquid
Vulcanized sodium, the sodium carbonate crystalline particle of generation, cause to crystallize wall built-up；Second effect is to prevent from having generated, mixed in absorbing liquid
The sodium bicarbonate particle of conjunction adheres to wall in droplets, heated rear liquid phase evaporation, causes sodium bicarbonate particle to remain wall
It is upper to form crystallization wall built-up；3rd be liquid film heat-blocking action, the drop that can effectively prevent temperature higher, which is attached to, to be easy to radiate
Wall on cause to cool, drop cooling easily produce TDS separate out and produce crystallization wall built-up.The wall protected using liquid film
It can effectively reduce, even eliminate crystallization wall built-up phenomenon, so as to realize stable production process, continuous long-term operation.
3rd, Acidic Gas Treating technique and system of the present invention, alkali lye blending tank is returned to using part NaHS and reacted with NaOH solution
Generate Na2S, then with Na2S uses as the absorbing liquid of second order reaction, reduces the CO in absorption system2, contain admittedly in reduction system
Rate, ensure that device is stable, continuously run.
4th, in Acidic Gas Treating technique and system of the present invention, by being set in the 2nd processor gas phase entrance connecting pipeline
Lack of gas pipeline is supplemented, the gas gas-phase objects doses in the processing of supplement the 2nd, gas liquid ratio is improved, improves the uniformity in flow field, greatly reduce
H in sour gas2S and CO2Concentration, especially reduce CO in sour gas2Concentration, reduce solution to CO2Absorption, most of CO2
Device is carried over together with carrier gas, controls Na2CO3And NaHCO3Content, prevent from producing a large amount of Na2CO3Cause to crystallize, block pipe
Line, not only ensures the quality of product NaHS, and realizes Hydrogen Sulfide Tail Gas decontamination index, reaches waste gas purification and production is closed
Format the resultant effect of chemical product, while ensure device long period, continuous, steady running.
5th, compared with prior art, Acidic Gas Treating technique and system equipment small scale of the present invention, operating cost is few, energy consumption
It is low, and technique is simple, and while producing chemical products, energy conservation object is realized using reaction heat.
Brief description of the drawings
Fig. 1 is Acidic Gas Treating technique of the present invention and system flow schematic diagram.
Fig. 2 is the structural representation of the 1st processor of the invention.
Fig. 3 is the structural representation of the 2nd processor of the invention.
Embodiment
As shown in figure 1, the present invention provides a kind of Acidic Gas Treating technique and system, the system include the 1st processor 1,
2nd processor 2 and alkali lye blending tank 3；The gas phase entrance of 1st processor is connected with sour gas suction line 4, and it is used to receive simultaneously
Sour gas is handled, the 1st stream of gas phase and the 2nd stream of liquid phase are obtained after processing, the 2nd stream is divided into the 21st stream, the 22nd
Four stream, the 23rd stream and the 24th stream sub-streams, liquid phase material entrance of the 21st stream through pipeline 5 by the 1st processor
It is recycled to the 1st processor, the 22nd stream is recycled to the 1st processor through pipeline 6 by the absorbing liquid entrance of the 1st processor, and the 23rd
Stream is connected through pipeline 7 with products pot, and the 24th stream is connected through pipeline 8 with alkali lye blending tank 3, the entrance of alkali lye blending tank also with
Alkali liquor inlet pipeline 15 connects, and it is used to receive the 24th stream from the 1st processor, with the hydrogen-oxygen from alkali liquor inlet pipeline
Change sodium solution hybrid reaction, obtain the 5th stream of liquid phase, the 5th stream is entered through pipeline 16 by the treatment fluid of the 2nd processor 2
Mouth 51 returns to the 2nd processors 2.1st stream of gas phase is by the gaseous phase outlet of the 1st processor 1 through pipeline and the 2nd processor 2
Gas phase entrance connects, and the gas phase entrance of the 2nd processor also has lack of gas suction line 17 to connect, and is obtained after being reacted with absorbing liquid
3rd stream of gas phase and the 4th stream of liquid phase；4th stream is divided into three the 41st stream, the 42nd stream and the 43rd stream son material
Stream, the 3rd stream are discharged by the purified gas discharge pipe line 13 of gaseous phase outlet of the 2nd processor 2, and the 41st stream passes through through pipeline 11
The absorbing liquid entrance of 1st processor 1 is recycled to the 1st processor 1, absorbing liquid of the 42nd stream through pipeline 12 by the 2nd processor 2
Entrance is recycled to the 2nd processor 2, and the 43rd stream is recycled at the 2nd through pipeline 10 by the liquid phase material entrance of the 2nd processor 2
Manage device 2.
As shown in Figure 2 and Figure 3, the present invention is produced in process and the device of NaHS, the 1st processor, the 2nd
Processor is venturi reactor, and the reactor is made up of upper, middle and lower segment, wherein, epimere is liquid film generator tube, stage casing
For reaction tube, hypomere is gas-liquid separation pipe, and the liquid film generator tube, reaction tube, gas-liquid separation pipe go to upper and lower and be connected in series, and
Arranged for same axis；
The liquid film generator tube is made up of outer cylinder body 34, inner barrel 33, upper annular closure disk 32 and lower annular closure disk 36,
Opened up on the inner barrel 33 of liquid film generator tube and be provided with gas phase in horizontal, some liquid channels 35 of annular spread, liquid film generator tube
Entrance 31 and liquid phase material entrance 30, the gas phase entrance 31 are arranged on the upper end of the inner barrel 33 of liquid film generator tube, the liquid
Phase materials entrance 30 is arranged in the side wall of outer cylinder body 34 of liquid film generator tube, and the liquid channel 35 is triangle, circle, length
One kind in bar shaped or continuous annular space, preferably continuous annular space.
The reaction tube is from top to bottom followed successively by feed zone 39, contraction section 40, trunnion section 41, expansion segment 42 and discharging section
43, the upper end of feed zone 39 of the reaction tube is connected with the lower end of inner barrel 33 of liquid film generator tube, and the tube wall of reaction tube, which is provided with, to be inhaled
Liquid entrance 37 is received, absorbing liquid entrance 37 is located at the top of trunnion section 41, and the absorbing liquid entrance 37 of the reaction tube connects liquid phase distribution
Device 38, liquid phase distributor 38 are arranged on reaction tube center line, spray absorbing liquid, liquid phase distributor 38 settable 1 from top to bottom
~10, preferably 4~6；
The gas-liquid separation pipe is by upper cover plate 47, gas-liquid separation pipe inner barrel 45, gas-liquid separation pipe outer cylinder body 46 and lower end
Plate 49 is formed；The top of inner barrel 45 of gas-liquid separation pipe and the lower end of discharging section 43 of reaction tube connect, and gas-liquid separation pipe is provided with gas
Mutually outlet 44 and liquid-phase outlet 50, the bottom of inner barrel 45 for stating gas-liquid separation pipe open up teeth groove 48, and the structure of teeth groove 48 is sector
Teeth groove, square teeth groove, triangle teeth groove, preferably lance tooth slot structure, space width are 3mm~20mm, preferably 5mm~
8mm；Its bottom angle is 15~90 °, preferably 30~60 °, and the gaseous phase outlet 44 is arranged on the outer cylinder body 46 of gas-liquid separation pipe
Side wall on, and the position of gaseous phase outlet 44, higher than the lower end outlet of the inner barrel 45 of gas-liquid separation pipe, liquid-phase outlet 50 is located at
The bottom of the outer cylinder body 46 of gas-liquid separation pipe, the gas-liquid separation pipe of the 2nd processor are provided with treatment fluid entrance 51, and treatment fluid enters
Mouth 51 is arranged in the side wall of outer cylinder body 46 of gas-liquid separation pipe, and the position for the treatment of fluid entrance 51 is interior less than gas-liquid separation pipe
The position of the lower end outlet of cylinder 45.
With reference to Fig. 1, Fig. 2 and Fig. 3, the process that NaHS is produced to the present invention is described further, come from
The sour gas of sour gas suction line 4 enters the 1st processor, and the 41st stream haptoreaction from the 2nd processor, carry out with
Gas phase is continuous phase, gas-liquid mass transfer and reaction of the liquid phase for dispersed phase, obtained after processing gas phase the 1st stream and liquid phase the 2nd
Stream, the 2nd stream is divided into four the 21st stream, the 22nd stream, the 23rd stream and the 24th stream sub-streams, the 21st stream is through pipe
Line 5 is recycled to the 1st processor by the liquid phase material entrance of the 1st processor, when liquid level in the outer cylinder body of liquid film generator tube
More than inner barrel liquid channel liquid level when, liquid phase material is divided on the inwall of liquid film generator tube inner barrel with wall manifold state
Cloth, forms uniform flow liquid film, and liquid film forms separation layer between reaction tube and reacting field, prevents the H in sour gas2S、CO2
Vulcanized sodium, the sodium acid carbonate crystalline particle attachment reaction device inwall generated with absorbing liquid reaction, while reaction drop is sent in punching, is prevented
Wall built-up, while using liquid film as heat-absorbing medium, reaction heat is taken out in time, product solution excessive vaporization is effectively prevented, prevents wall mistake
Thermal conductivity cause vulcanized sodium, sodium carbonate excessive vaporization and crystallize wall built-up, ensure stable production process, continuous long-term operation.If not yet
There is the presence of liquid film, spray droplet can be adhered to wall, and reaction heat temperature is higher, can produce evaporation, causes vulcanized sodium to separate out
Crystallization；In addition, if without the presence of liquid film, tiny sodium bicarbonate solid particle can be attached to reactor device with spray droplet
On wall, because reaction temperature is higher, particle attachment wall, causes the blocking of reactor after drop evaporation；After liquid film is set, can have
Effect avoids Na2S crystallizes the attachment of wall built-up and sodium bicarbonate particle；22nd stream is entered through pipeline 6 by the absorbing liquid of the 1st processor
Mouth is recycled to the 1st processor, so as to improve the reaction liquid-gas ratio in the 1st processor, optimization mass transfer and reaction, reduces and reacts strong
Degree, Product Precision being improved, the 23rd stream is connected through pipeline 7 with products pot, and the 24th stream enters alkali lye blending tank 3 through pipeline 8, with
The NaOH solution haptoreaction generation vulcanized sodium of alkali liquor inlet pipeline 15 passes through the as the absorbing liquid of the 2nd processor through pipeline 16
The treatment fluid entrance 51 of 2 processors enters the 2nd processor 2, handles reacted sour gas by the 1st processor, enters with lack of gas
Continue absorbing reaction into the 2nd processor after the lack of gas mixing of mouthful pipeline 17, obtain gas phase the 3rd stream and liquid phase the
4 streams；4th stream is divided into three the 41st stream, the 42nd stream and the 43rd stream sub-streams, the 41st stream passes through through pipeline
The absorbing liquid entrance of 1 processor is recycled to the 1st processor, and the 42nd stream is followed through pipeline by the absorbing liquid entrance of the 2nd processor
Ring to the 2nd processor, the 43rd stream is recycled to the 2nd processor through pipeline 10 by the liquid phase material entrance of the 2nd processor.3rd
Stream is discharged by the purified gas discharge pipe line 13 of gaseous phase outlet of the 2nd processor, the gaseous phase outlet of the 1st processor and
Hydrogen sulfide on-line computing model 14 is set in the gas phase entrance connecting pipeline of 2 processors, control valve is set on alkali liquor inlet pipeline 9
15, by hydrogen sulfide on-line computing model 14, detection into the concentration of hydrogen sulfide in the gas of the 2nd processor 1000ppm~
Fluctuated between 9000mmp, export 4 ~ 20mA continuous signal, set for sodium hydroxide solution inlet amount in alkali liquor inlet pipeline
Regulation, the automated production process of realization device.
Illustrate the reaction effect of the present invention with reference to embodiment, but therefore do not limit the scope of the invention.
Embodiment 1
Using process and device as shown in Figure 1, using sour gas and NaOH solution as raw material, reacted.It is acid
CO in gas2Volume fraction is 7%, H2S volume fractions are 92%, and hydro carbons volume fraction is 1%.NaOH solution mass concentration is 38%.
In embodiment 1, the 1st processor and the 2nd processor are using the structure shown in Fig. 2, Fig. 3.In embodiment 1, the 1st
In 2nd stream of the liquid phase that processor obtains, the volume flow of the 21st stream accounts for the 5% of the 2nd stream total volumetric flow rate, the 22nd material
The volume flow of stream accounts for the 60% of the 2nd stream total volumetric flow rate；, the volume flow of the 23rd stream accounts for the 2nd stream total volumetric flow rate
10%, the volume flow of the 24th stream accounts for the 25% of the 2nd stream total volumetric flow rate.4th stream of the liquid phase that the 2nd processor obtains
In, the volume flow of the 41st stream accounts for the 30% of the 4th stream total volumetric flow rate, and the volume flow of the 42nd stream accounts for the 4th stream totality
The 60% of product flow, the volume flow of the 43rd stream accounts for the 10% of the 4th stream total volumetric flow rate.In 1st processor, the 2nd processor
The liquid-gas ratio of absorbing liquid and sour gas is 5L/m3.In 1st processor, the 2nd processor controlling reaction temperature be 80 DEG C -85 DEG C it
Between, reaction result is shown in Table 1.The volume flow of 24th stream and the volume flow proportion of sodium hydroxide solution are 3/2.It is described weary
Gas is nitrogen, and the volume flow of lack of gas is 2 with the volume flow ratio of total acidic gas:1.
Comparative example 1
Same as Example 1, difference does not connect for the gas phase entrance of the 2nd processor with lack of gas suction line
Connect, there is no lack of gas into the gas phase of the 2nd processor.
Comparative example 2
Same as Example 1, difference is that the absorbing reaction device is conventional retort.
Comparative example 3
Same as Example 1, difference is that obtained the 21st stream of the 1st processor, the 2nd processor obtain
43 streams enter the 1st processor, the 2nd processor by the 1st processor, the 2nd processor absorbing liquid entrance respectively, cancel through liquid phase
Material inlet enters the 1st processor, the 2nd processor this circulation.
The embodiment of table 1 and comparative example reaction result
| Embodiment 1 | Comparative example 1 | Comparative example 2 | Comparative example 3 | |
| NaHS product designs | 41% | 41% | 39% | 40% |
| Na2S contents | <1% | <1% | <4% | <3% |
| H in purified gas2S contents（mg/Nm3） | 23 | 23 | 30 | 27 |
| Device service cycle | 900h still steady runnings | 500h is blocked | 300h is blocked | 350h is blocked |
Claims (38)
1. a kind of Acidic Gas Treating technique, the technique is using sodium hydroxide as absorbent, by two-stage gas liquid reaction and one-level liquid
Liquid course of reaction, tail gas qualified discharge is realized, and produce the chemical products for meeting national product quality standard；The technique bag
Include：
Using the 1st processor, it is used to receiving and handling sour gas, and the 1st stream of gas phase and the 2nd material of liquid phase are obtained after processing
Stream, is divided into four the 21st stream, the 22nd stream, the 23rd stream and the 24th stream sub-streams by the 2nd stream, wherein by the 21st stream
It is recycled to the 1st processor to be used to form liquid film, the 22nd stream is recycled into the 1st processor as absorbing liquid uses, by the 23rd material
Stream is discharged as product；
Using the 2nd processor, it is used to handle the lack of gas from lack of gas suction line and the 1st stream from the 1st processor
Gaseous mixture, obtain the 3rd stream of gas phase and the 4th stream of liquid phase；4th stream is divided into the 41st stream, the 42nd stream and the 43rd
Three sub-streams of stream, are used wherein the 41st stream is back in the 1st processor as absorbing liquid, for handling the acidity
Gas；42nd stream is recycled into the 2nd processor as absorbing liquid to use, the 43rd stream is recycled to the 2nd processor as protection
Liquid uses；
Using alkali lye blending tank, it is used to receive the 24th stream from the 1st processor, with the hydrogen-oxygen from alkali liquor inlet pipeline
Change sodium solution hybrid reaction, obtain the 5th stream of liquid phase, the 5th stream is returned into the 2nd processor uses as absorbing liquid.
2. according to the technique described in claim 1, it is characterised in that：The sour gas includes hydrogen sulfide and carbon dioxide.
3. according to the technique described in claim 1 or 2, it is characterised in that：The lack of gas are not anti-with sour gas and NaOH solution
The arbitrary gas answered.
4. according to the technique described in claim 1 or 2, it is characterised in that：The lack of gas are low-pressure gas, nitrogen, indifferent gas
Any of body.
5. according to the technique described in claim 1, it is characterised in that：At the volume flow and sour gas suction line of the lack of gas
Sour gas volume flow ratio be 1:1~3:1.
6. according to the technique described in claim 1 or 5, it is characterised in that：The volume flow of the lack of gas and sour gas inlet tube
The volume flow ratio of sour gas at line is 1.5:1~2:1.
7. according to the technique described in claim 1, it is characterised in that：The reaction temperature of 1st processor and the 2nd processor is
70~100 DEG C.
8. according to the technique described in claim 1 or 7, it is characterised in that：The reaction temperature of 1st processor and the 2nd processor
Spend for 80~95 DEG C.
9. according to the technique described in claim 1, it is characterised in that：In 1st processor and the 2nd processor, absorbing liquid with
The liquid-gas ratio of sour gas is 3~20L/m3。
10. according to the technique described in claim 1 or 9, it is characterised in that：In 1st processor and the 2nd processor, inhale
The liquid-gas ratio for receiving liquid and sour gas is 5~10 L/m3。
11. according to the technique described in claim 1, it is characterised in that：The volume flow of the 24th stream in the alkali lye blending tank
The volume flow proportion of amount and sodium hydroxide solution is 3/1~1/1.
12. according to the technique described in claim 1, it is characterised in that：The volume flow of 21st stream accounts for the 2nd stream totality
The 3%~10% of product flow, the volume flow of the 22nd stream accounts for the 50%~80% of the 2nd stream total volumetric flow rate, the body of the 23rd stream
Product flow accounts for the 10%~20% of the 2nd stream total volumetric flow rate, and the volume flow of the 24th stream accounts for the 2nd stream total volumetric flow rate
10%~30%.
13. according to the technique described in claim 1 or 12, it is characterised in that：The volume flow of 21st stream accounts for the 2nd stream
The 5%~7% of total volumetric flow rate；The volume flow of 22nd stream accounts for the 60%~70% of the 2nd stream total volumetric flow rate, the 23rd stream
Volume flow accounts for the 10% of the 2nd stream total volumetric flow rate, the volume flow of the 24th stream account for the 2nd stream total volumetric flow rate 13%~
25%。
14. according to the technique described in claim 1, it is characterised in that：The volume flow of 41st stream accounts for the 4th stream totality
The 20%~40% of product flow, the volume flow of the 42nd stream accounts for the 50%~80% of the 2nd stream total volumetric flow rate, the body of the 43rd stream
Product flow accounts for the 5%~25% of the 4th stream total volumetric flow rate.
15. according to the technique described in claim 1 or 14, it is characterised in that：The volume flow of 41st stream accounts for the 4th stream
The 30%~35% of total volumetric flow rate, the volume flow of the 42nd stream account for the 60%~70% of the 2nd stream total volumetric flow rate, the 43rd stream
Volume flow account for the 8%~15% of the 4th stream total volumetric flow rate.
16. according to the technique described in claim 1, it is characterised in that：Sodium hydroxide solution mass concentration is 20%~60%.
17. according to the technique described in claim 1 or 16, it is characterised in that：Sodium hydroxide solution mass concentration is 32%~45%.
18. according to the technique described in claim 1, it is characterised in that：1st processor, the 2nd processor react for venturi
Device, the reactor are made up of upper, middle and lower segment, wherein, epimere is liquid film generator tube, and stage casing is reaction tube, and hypomere is gas-liquid
Separating pipe, the liquid film generator tube, reaction tube, gas-liquid separation pipe go to upper and lower and are connected in series, and are arranged for same axis；
The liquid film generator tube is made up of outer cylinder body, inner barrel, upper annular closure disk and lower annular closure disk, liquid film generator tube
Opened up on inner barrel in horizontal, some liquid channels of annular spread, liquid film generator tube is provided with gas phase entrance and liquid phase material enters
Mouthful；
The reaction tube is from top to bottom followed successively by feed zone, contraction section, trunnion section, expansion segment and discharging section, the reaction tube
Feed zone upper end is connected with the inner barrel lower end of liquid film generator tube, and the tube wall of reaction tube is provided with absorbing liquid entrance, absorbing liquid entrance
Positioned at trunnion section top；
The gas-liquid separation pipe is made up of upper cover plate, gas-liquid separation pipe inner barrel, gas-liquid separation pipe outer cylinder body and bottom plate；Gas-liquid
The inner barrel top of separating pipe and the discharging section lower end of reaction tube connect, and gas-liquid separation pipe is provided with gaseous phase outlet and liquid-phase outlet.
19. according to the technique described in claim 18, it is characterised in that：The liquid film generator tube is provided with gas phase entrance and liquid phase thing
Expect entrance, the gas phase entrance is arranged on the upper end of the inner barrel of liquid film generator tube, and the liquid phase material entrance is arranged on liquid film
In the side wall of the outer cylinder body of generator tube.
20. according to the technique described in claim 18, it is characterised in that：The liquid channel be triangle, circle, strip or
One kind in continuous annular space.
21. according to the technique described in claim 18 or 20, it is characterised in that：The liquid channel is continuous annular space.
22. according to the technique described in claim 18, it is characterised in that：The absorbing liquid entrance connection liquid phase distribution of the reaction tube
Device, liquid phase distributor are arranged on reaction tube center line, spray absorbing liquid from top to bottom, and liquid phase distributor sets 1~10.
23. according to the technique described in claim 22, it is characterised in that：Liquid phase distributor sets 4~6.
24. according to the technique described in claim 18, it is characterised in that：The inner barrel bottom of the gas-liquid separation pipe opens up tooth
Groove, tooth slot structure are fan-shaped teeth groove, square teeth groove, triangle teeth groove, and space width is 3mm~20mm, and its bottom angle is 15
~90 °.
25. according to the technique described in claim 24, it is characterised in that：The tooth slot structure is lance tooth slot structure, teeth groove
Width is 5mm~8mm；Its bottom angle is 30~60 °.
26. according to the technique described in claim 18, it is characterised in that：The gas-liquid separation pipe is provided with gaseous phase outlet and liquid phase goes out
Mouthful, gaseous phase outlet is arranged in the side wall of the outer cylinder body of gas-liquid separation pipe, and the position of gaseous phase outlet is higher than gas-liquid separation pipe
The lower end outlet of inner barrel, liquid-phase outlet are located at the bottom of the outer cylinder body of gas-liquid separation pipe.
27. according to the technique described in claim 18, it is characterised in that：The gas-liquid separation pipe of 2nd processor is provided with processing
Liquid entrance, treatment fluid entrance are arranged in the side wall of the outer cylinder body of gas-liquid separation pipe, and the position for the treatment of fluid entrance is less than gas-liquid
The position of the lower end outlet of the inner barrel of separating pipe.
28. a kind of Acidic Gas Treating system, the system includes the 1st processor, the 2nd processor and alkali lye blending tank；
1st processor, the gas phase entrance of the 1st processor are connected with sour gas suction line, and it is used to receiving and handling acid
Property gas, obtains the 1st stream of gas phase and the 2nd stream of liquid phase after processing, the 2nd stream is divided into the 21st stream, the 22nd stream,
Four sub-streams of 23 streams and the 24th stream, the 21st stream are recycled to the 1st through pipeline by the liquid phase material entrance of the 1st processor
Processor, the 22nd stream are recycled to the 1st processor through pipeline by the absorbing liquid entrance of the 1st processor, and the 23rd stream is through pipeline
It is connected with products pot, the 24th stream is connected through pipeline with the liquid phase entrance of alkali lye blending tank；
2nd processor, it is used for the mixing for handling the lack of gas from lack of gas suction line and the 1st stream from the 1st processor
Gas, obtain the 3rd stream of gas phase and the 4th stream of liquid phase；4th stream is divided into the 41st stream, the 42nd stream and the 43rd stream
Three sub-streams, the 3rd stream are discharged by the purified gas discharge pipe line of gaseous phase outlet of the 2nd processor, and the 41st stream is through pipeline
1st processor, absorbing liquid of the 42nd stream through pipeline by the 2nd processor are recycled to by the absorbing liquid entrance of the 1st processor
Entrance is recycled to the 2nd processor, and the 43rd stream is recycled to the 2nd processor through pipeline by the liquid phase material entrance of the 2nd processor；
Alkali lye blending tank, it is used to receive the 24th stream from the 1st processor, with the sodium hydroxide from alkali liquor inlet pipeline
Solution hybrid reaction, the 5th stream of liquid phase is obtained, the 5th stream is returned to the through pipeline by the treatment fluid entrance of the 2nd processor
2 processors.
29. according to the system described in claim 28, it is characterised in that：1st processor, the 2nd processor are that venturi is anti-
Device is answered, the reactor is made up of upper, middle and lower segment, wherein, epimere is liquid film generator tube, and stage casing is reaction tube, and hypomere is gas
Liquid separating pipe, the liquid film generator tube, reaction tube, gas-liquid separation pipe go to upper and lower and are connected in series, and are arranged for same axis；
The liquid film generator tube is made up of outer cylinder body, inner barrel, upper annular closure disk and lower annular closure disk, liquid film generator tube
Opened up on inner barrel in horizontal, some liquid channels of annular spread, liquid film generator tube is provided with gas phase entrance and liquid phase material enters
Mouthful；
The reaction tube is from top to bottom followed successively by feed zone, contraction section, trunnion section, expansion segment and discharging section, the reaction tube
Feed zone upper end is connected with the inner barrel lower end of liquid film generator tube, and the tube wall of reaction tube is provided with absorbing liquid entrance, absorbing liquid entrance
Positioned at trunnion section top；
The gas-liquid separation pipe is made up of upper cover plate, gas-liquid separation pipe inner barrel, gas-liquid separation pipe outer cylinder body and bottom plate；Gas-liquid
The inner barrel top of separating pipe and the discharging section lower end of reaction tube connect, and gas-liquid separation pipe is provided with gaseous phase outlet and liquid-phase outlet.
30. according to the system described in claim 29, it is characterised in that：The liquid film generator tube is provided with gas phase entrance and liquid phase thing
Expect entrance, the gas phase entrance is arranged on the upper end of the inner barrel of liquid film generator tube, and the liquid phase material entrance is arranged on liquid film
In the side wall of the outer cylinder body of generator tube.
31. according to the system described in claim 30, it is characterised in that：The liquid channel be triangle, circle, strip or
One kind in continuous annular space.
32. according to the system described in claim 31, it is characterised in that：The liquid channel is continuous annular space.
33. according to the system any one of claim 29, it is characterised in that：The absorbing liquid entrance connection of the reaction tube
Liquid phase distributor, liquid phase distributor are arranged on reaction tube center line, spray absorbing liquid from top to bottom, and liquid phase distributor sets 1
~10.
34. according to the system described in claim 33, it is characterised in that：The liquid phase distributor sets 4~6.
35. according to the system described in claim 29, it is characterised in that：The inner barrel bottom of the gas-liquid separation pipe opens up tooth
Groove, tooth slot structure are fan-shaped teeth groove, square teeth groove, triangle teeth groove, and space width is 3mm~20mm, and its bottom angle is 15
~90 °.
36. according to the system described in claim 35, it is characterised in that：The inner barrel bottom of the gas-liquid separation pipe opens up tooth
Groove, tooth slot structure are lance tooth slot structure, and space width is 5mm~8mm；Its bottom angle is 30~60 °.
37. according to the system described in claim 29, it is characterised in that：The gas-liquid separation pipe is provided with gaseous phase outlet and liquid phase goes out
Mouthful, gaseous phase outlet is arranged in the side wall of the outer cylinder body of gas-liquid separation pipe, and the position of gaseous phase outlet is higher than gas-liquid separation pipe
The lower end outlet of inner barrel, liquid-phase outlet are located at the bottom of the outer cylinder body of gas-liquid separation pipe.
38. according to the system described in claim 29, it is characterised in that：The gas-liquid separation pipe of 2nd processor is provided with processing
Liquid entrance, treatment fluid entrance are arranged in the side wall of the outer cylinder body of gas-liquid separation pipe, and treatment fluid enters the position of implication and is less than gas
The position of the lower end outlet of the inner barrel of liquid separating pipe.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101092576A (en) * | 2006-06-23 | 2007-12-26 | 中国石油化工股份有限公司 | Method for removing acid gases in cracked gas |
| CN103691282A (en) * | 2013-12-18 | 2014-04-02 | 安徽工业大学 | Method for preparing sodium carbonate from hydrogen sulfide acid gas |
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| JPS56121686A (en) * | 1980-02-27 | 1981-09-24 | Kawasaki Heavy Ind Ltd | Poison neutralization and reutilization of liquid absorbed hydrogen cyanide |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101092576A (en) * | 2006-06-23 | 2007-12-26 | 中国石油化工股份有限公司 | Method for removing acid gases in cracked gas |
| CN103691282A (en) * | 2013-12-18 | 2014-04-02 | 安徽工业大学 | Method for preparing sodium carbonate from hydrogen sulfide acid gas |
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