CN105731497A - Method and apparatus for producing sodium bicarbonate by using acidic gas - Google Patents
Method and apparatus for producing sodium bicarbonate by using acidic gas Download PDFInfo
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- CN105731497A CN105731497A CN201410732127.2A CN201410732127A CN105731497A CN 105731497 A CN105731497 A CN 105731497A CN 201410732127 A CN201410732127 A CN 201410732127A CN 105731497 A CN105731497 A CN 105731497A
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Abstract
The invention provides a method and apparatus for producing sodium bicarbonate by using acidic gas. The process employs sodium carbonate solution as an absorption liquid, sodium hydroxide solution as a washing liquid and sodium sulfhydrate as a protective solution, and comprises six sections of absorption reaction, solid-liquid separation, washing, an air-slake pneumatic conveying gas device and bagging, so as to achieve exhaust emissions on standard, and produce sodium bicarbonate chemical product in line with national standards for quality of products. The apparatus comprises a liquid film absorption reactor, a solid-liquid separator, a scrubber, an air-slake pneumatic conveying gas device, a cyclone separator, a process pipeline and a pump. The acidic gas treatment method and apparatus achieve dual goals of acidic gas purification and contaminant recycling.
Description
Technical field
The present invention relates to a kind of method utilizing sour gas to produce sodium bicarbonate and device, belong to field of chemical engineering, rich in the comprehensive utilization of hydrogen sulfide and carbon dioxide gas mixture suitable in petrochemical industry sour gas, the operating mode that to be especially suitable in sour gas carbonated concentration higher.
Background technology
Element sulphur is prevalent in Fossil fuel, and when oil enters fine fractional distillation with deep-processing process, with hydrogen evolution hydrogen sulfide gas, this process also tends to association carbon dioxide, ammonia etc..The raw material of metallurgy industry there is also element sulphur, but owing to its course of processing mostly is worst hot case, element sulphur is oxidized, mainly generates sulfur dioxide sour gas.Other operating mode producing sour gas mostly occurs in chemical process or chemical products use procedure.
The sour gas of petroleum chemical industry mostlys come from natural gas extraction, associated gas, Coal Chemical Industry, oil-refining chemical industry.It is processed in the process processed follow-up process can be had a negative impact (such as catalyst poisoning, corrosive pipeline) again at the energy, it is therefore necessary to control the sulfur content in raw materials technology and product.In the process of desulfurization, element sulphur leaves row outside process system with the form of hydrogen sulfide and enters boiler burning, enters air in the form of sulphur dioxide.China's flue gas desulfurization technique starting ratio is later, and desulfuration byproduct utilization rate is lower.So, overwhelming majority desulfuration byproduct is idle to be stacked, and takies a large amount of land resource and causes secondary pollution.And adopt desulfurizing agent circular regeneration to use, reclaim the desulfurization technology of Sulphur ressource, it reclaims product is elemental sulfur and sulphuric acid etc., all can as industrial chemicals, and for other sulfur removal technologies, it reclaims product better market prospect.
The process of China's sour gas, prepares sulfur mainly by sour gas, and the more commonly used at present have two kinds of Technologies, one be two grades of claus process in conjunction with tail gas hydrogenation reducing process, and solvent absorption process technology.Another kind of Technology is the LO-CAT Technology of gas technology Products Co., Ltd of Merichem company of U.S. exploitation.
Crouse's sulphur recovery technology have passed through a series of development and perfect, has defined a comparatively huge technical system.Initial Claus method is hydrogen sulfide and oxygen first mixes, and under certain temperature conditions, catalytic oxidation generates elemental sulfur.Original Claus method be mainly characterized by with air for oxidant, reaction carry out in a fixed bed adiabatic reactor.
Within 1938, original Claus method is improved by German method our company, and the oxidation reaction of hydrogen sulfide is divided into two stages carry out: the first stage is the Oxidation of Hydrogen Sulfide of 1/3 is sulfur dioxide, reaction heat Steam Recovery；Second stage is hydrogen sulfide and the sulfur dioxide reaction generation elemental sulfur of residue 2/3.This technological innovation solves 3 problems of original Claus method: one is the reaction that claus reaction stove is mainly that Oxidation of Hydrogen Sulfide is sulfur dioxide, it is not necessary to maintain low reaction temperature；Two be 80% reaction heat can reclaim, way of recycling is steam；Three is that the treating capacity of hydrogen sulfide improves 50 times than original Claus method.This technology is referred to as improvement Claus method.In actual applications, in order to adapt to different sour gas compositions and meet the sulfur dioxide (SO2) emissions requirement of increasingly stringent, improvement Claus method defines technical process four kinds basic: 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 most widely used sulphur recovery technology now, and this technology has been done substantial amounts of research by people.Propose rich oxygen Claus technology, super Claus technology (SuperClaus99), super excellent Crouse's technology (SuperClaus99.5) etc. on this basis.
Up to now, processing the topmost means of hydrogen sulfide is hydramine method absorption technique and Claus unit sulfur recovery unit, and especially after super Claus Sulfur Recovery Technique is developed, the removal efficiency of hydrogen sulfide has reached more than 99%.At present, this method is at home and abroad used widely.
LO-CAT technique adopts the iron catalyst of multicomponent chelate to make hydrogen sulfide be converted into elementary sulfur, and the removal efficiency of hydrogen sulfide is more than 99.9%.It is relatively big that LO-CAT technique can be suitable for acid tolerance fluctuation, and hydrogen sulfide content is in the various operating modes of 0～100%, and raw material condition of compatibility is wide in range, adapts to the practical situation of sour gas fluctuation change.And LO-CAT liquid redox treatment scheme does not use any poisonous chemicals, and will not producing any harmful exhaust gas by-products, environmentally safe catalyst can be constantly regenerating in processing procedure.Stability and economic benefit that LO-CAT sulfur removal technology runs depend primarily on the stability of doctor solution and the consumption of chemicals.According to difference its stability also different characteristics forming complex between iron ion and chelating agent, LO-CAT have selected different chelating agent to configure Complexing Iron solution, it is prevented that the generation of Iron sulfuret. precipitation.
LO-CAT technology features is that technological process is simple, and operating flexibility is big, and floor space is little, and first investment cost is low；But operating cost is too high, chemical solvent consumption is big, is not suitable for larger desulfurizer, and iron content waste water is difficult, and sulfur product is of low quality.LO-CAT technique is abroad directed generally to reduce production cost, reduces equipment size and improves the quality etc. of sulfur.Domestic aspect, the dominant catalyst that LO-CAT technique uses and other chemical agents are import, and the research work of associated catalysts also needs to put into extensive work also in the research and development of starting stage LO-CAT catalyst.
Sulphuric acid, as one of basic industrial chemicals, is widely used in all trades and professions.With the hydrogen sulfide contained in sour gas as raw material, it is possible to save many processing steps, namely save investment, reduce again cost, it is also possible to effectively recycle Sulphur ressource.Owing to small-sized sour gas tolerance is less, the industrial sulphuric acid of low concentration can only be produced, can not the higher oleum of productive value, economic benefit is not high, simultaneously, owing to the transport of sulphuric acid, storage all acquire a certain degree of difficulty, therefore, the market demand stable near oil plant is the key factor limiting its development.Patent CN101143714A discloses a kind of method that sour gas utilizing high hydrocarbon-containing prepares sulphuric acid, acid hydrogen sulfide gas respectively enters in proportion in first, second sulfureted hydrogen burning stove and burns, the high-temperature furnace gas out from the first combustion furnace, pass through burner-gas cooler, it is cooled to uniform temperature by air, continue and surplus air one combust in furnace gas subsequently into the second combustion furnace and the sulfide hydrogen sour gas supplemented, second combustion furnace high-temperature furnace gas out enters waste heat boiler heat accumulation, enters back into purification section, conversion section, dry absorption section carry out conventional antacid.This process can only produce 98% industrial sulphuric acid, it is impossible to the oleum that productive value is higher, simultaneously as the transport of sulphuric acid, store all acquire a certain degree of difficulty, therefore, the market demand stable near oil plant is the key factor limiting its development.
The comprehensive utilization of sour gas, it is possible to adopting and invest less absorption process sulfur removal technology technology, hydrogen sulfide recovery, with alkaline agent for absorbent, is prepared sulphite by this technology.Sour gas is carried out burning and generates sulfur dioxide by this technology, it is then fed into absorption tower and carries out chemical absorbing generation sulfite solution, again solution is reacted with alkaline absorbent, prepare sulphite fluid product, or generating sulphite crystal, the operation such as separated, dry prepares into sulphite solid product.This process unit flow process is shorter, reaction is simple, operating flexibility is big, it is applicable to the sour gas operating mode of medium and small tolerance, and tolerance fluctuates on production process without impact, can pass through to select different operations to produce solid or fluid product, select different absorbent can produce different types of sulphite, and realize tail gas qualified discharge by three sections of absorptions, it is achieved the purpose of cleaning of off-gas.But it is serious to there is equipment corrosion in actual production process, the determination that maintenance cost is higher.
The comprehensive utilization of sour gas, it would however also be possible to employ invest less novel absorbent method sulfur removal technology technology, produces chemical products akali sulphide.Akali sulphide is widely used in the industry such as ore dressing, pesticide, dyestuff, tanning production and organic synthesis.Wherein, the NaHS auxiliary agent for synthesizing organic intermediate with prepare sulfur dye in dye industry；Leather industry is used for depilation and the tanning of rawhide, is applied to leather industry routine and soaks, energy uniform loose's skin material fibrous tissue, skin material is made slowly to expand, have significantly crease-resistant and improve leather yield effect, and can ensure that the color of skin material indigo plant skin, it is ensured that the sense organ of skin material and quality；In chemical fertilizer industry, NaHS can be used for the free sulfur sloughing in activated carbon desulphurization agent；Pesticide industry is manufacture ammonium sulfide and the half-finished raw material of pesticide ethyl mercaptan；In mining industry, NaHS is largely used to copper ore dressing；Staple fibre is used for the aspects such as sulfurous acid dyeing in producing；NaHS can be additionally used in wastewater treatment.Day by day harsh along with environmental regulation, sulfur product consumption commercially reduces, and price also drops day by day, Sulfur price about 600 yuan/ton, and the market price of sodium sulfide is 2600 yuan/ton, and the market price of NaHS reaches 3200 yuan/ton especially.
Sour gas is utilized to produce low concentration solution product: low concentration is prevented effectively from crystallization, but solution product does not have use value, it is necessary to carrying out multistage evaporation concentration, energy consumption is significantly high, it does not have economy.
Patent CN102515112A " a kind of method that hydrogen sulfide waste gas utilizing viscose rayon to produce in producing prepares sodium sulfide " arranges spray-absorption, double flash evaporation and crystallisation by cooling process, this technology can only produce the solution that concentration is extremely low, there is the problems such as long flow path, the low concentration product liquid evaporation of generation, concentration process energy consumption height.
Patent CN103466559A " the three continuous production technologies of autoclave NaHS ", with sodium hydroxide for absorbing liquid, adopts three stage countercurrent absorption processes, it is achieved the continuous prodution of sodium hydrosulfide.The unstripped gas of this technology need to carry out the pretreatment of carbon dioxide removal, the problem such as there is long flow path, process units is complicated, particularly feed gas preprocessing energy consumption is significantly high, and device is complicated.Patent CN101654226A " method of preparing alkali sulphide by using sulfur dye waste gas ", with hydrogen sulfide containing using sulfur dye waste gas for raw material, adds alkali and reacts, generate akali sulphide.This technology production process is intermittently operated, there is alkaline agent and product low concentration, and rinser is numerous and diverse, produces waste water, and example 3,4 is easily generated blocking, cannot continuously generate, and there is solid waste problem.Patent CN103495329A " a kind of technique removing hydrogen sulfide Recovered sulphur ", is removed hydrogen sulfide by sewage stripping, sodium carbonate absorbs hydrogen sulfide, rich solution and produces sulfur foam under desulphurization catalyst effect, and filter, molten sulfur produces elemental sulfur four part composition.There is desulphurization catalyst costliness in this technology, sulfur foam entrained catalyst causes that sulfur product purity is not high, has the problems such as solid waste generation.
Sour gas is the mixing gas of hydrogen sulfide and carbon dioxide: at petrochemical industry; sour gas is generally hydrogen sulfide, carbon dioxide mix body; it is absorbent with alkaline agent, produces sodium sulfide or during sodium hydrosulfide product; the materials such as sodium sulfide, NaHS, sodium carbonate, sodium bicarbonate would generally be formed; when concentration reaches certain value; crystallization can be produced, cause that device blocking cannot normally realize continuous prodution.
For the Acidic Gas Treating of petrochemical industry, also stay in the extensive thinking model of " basic reason of utilization is the toxic gas that hydrogen sulfide is murther, it is necessary to is used or converts " at present.At present, under the new demand of " efficiency multiplication, sustainable economic development ", it is necessary to the Acidic Gas Treating method of a kind of novel " energy-conservation, consumption reduction, environmental protection ".
Summary of the invention
For the deficiencies in the prior art, the present invention provides a kind of method utilizing sour gas to produce sodium bicarbonate and device, compared with prior art, the inventive method and device suitable in petrochemical industry sour gas rich in the comprehensive utilization of hydrogen sulfide and carbon dioxide gas mixture, the operating mode that to be especially suitable in sour gas carbonated concentration higher, it is possible to realize sour gas and purify and the double goal of resource of pollutant.
For above-mentioned technical problem, the present invention provides a kind of method utilizing sour gas to produce sodium bicarbonate, described method includes that absorption reaction, solid-liquid separation, washing, air slaking are air conveying, gas solid separation and six processes of pack, it is achieved tail gas qualified discharge, and produces Sodium bicarbonate product；Described method specifically comprises the following steps that
(1) sour gas enters absorption reactor thermally, and with absorption liquid sodium carbonate haptoreaction, the purified qualified discharge of reacted sour gas, the reaction solution obtained enters solid-liquid separator, obtains solid-phase material and liquid phase material after separation；
(2) the liquid phase material part that step (1) obtains returns absorption reactor thermally through the liquid phase material entrance of absorption reactor thermally, collects partly as product and stores；
(3) solid-phase material that step (1) obtains enters scrubber, washs with sodium hydroxide solution counter current contacting, as absorbing liquid return absorption reactor thermally after the scrubbed liquid pans of cleaning mixture obtained after washing；
(4) in step (3), the bottoms effluent of scrubber enters air slaking air conveyor, the product residual liquid of elimination enters cleaning mixture pans, material after elimination product residual liquid is sent to cyclone separator and is easily separated, separate the gas emptying obtained, separate the solid sodium bicarbonate obtained and send to pack of weighing, obtain Sodium bicarbonate product.
Sour gas of the present invention produces in the method for sodium bicarbonate, and the reaction temperature in described absorption reactor thermally is 70～100 DEG C, it is preferred to 80～95 DEG C.The liquid-gas ratio of described absorption liquid and sour gas is 3～20L/m3, it is preferable that 5～10L/m3。
Sour gas of the present invention produces in the method for sodium bicarbonate, and the volume flow of the liquid phase material of the described return absorption reactor thermally of step (2) accounts for the 30%～70% of liquid phase material total volumetric flow rate, it is preferable that 40%～50%.
Sour gas of the present invention produces in the method for sodium bicarbonate, the described liquid phase material returning absorption reactor thermally, liquid phase material entrance entrance absorption reactor thermally through absorption reactor thermally, liquid film is formed at reactor wall, liquid film forms sealing coat between reaction tube and reacting field, it is prevented that the H in sour gas2S、CO2The sodium sulfide, the sodium carbonate crystalline particle attachment reaction device inwall that generate is reacted with absorbing liquid, simultaneously with liquid film for heat-absorbing medium, take out reaction heat, effectively prevent product solution excessive vaporization, prevent that wall is overheated causes sodium sulfide, sodium carbonate excessive vaporization and crystallization wall built-up, it is ensured that stable production process, continuous long-term operation.
Sour gas of the present invention produces in the method for sodium bicarbonate, described scrubber is normal-temperature operation, sodium hydroxide solution and product liquid are counter current contacting, the volume flow of described sodium hydroxide solution with enter scrubber solid-phase material volume flow ratio be 1/3 ~ 1/1, it is preferred to 2/3 ~ 1/2.
Sour gas of the present invention produces in the method for sodium bicarbonate, and described sour gas includes hydrogen sulfide and carbon dioxide.
Sour gas of the present invention produces in the method for sodium bicarbonate, and described sodium hydroxide solution mass concentration is 20%～60%, it is preferred to 32%～40%.
Sour gas of the present invention produces in the method for sodium bicarbonate, and described sodium carbonate liquor mass concentration is 10%～30%, it is preferred to 15%～25%.
In the inventive method, described absorption reactor thermally 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 that same axis is arranged；
Described liquid film generator tube is made up of outer cylinder body, inner barrel, upper annular closure dish and lower annular closure dish, the inner barrel of liquid film generator tube is offered in level, some liquid channels of annular spread, and liquid film generator tube is provided with gas phase entrance and liquid phase material entrance；
Described reaction tube is from top to bottom followed successively by feed zone, contraction section, trunnion section, expansion segment and discharging section, the feed zone upper end of described reaction tube is connected with the inner barrel lower end of liquid film generator tube, the tube wall of reaction tube is provided with absorption liquid entrance, absorbs liquid entrance and is positioned at trunnion section top；
Described 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 is connected with the discharging section lower end of reaction tube, and gas-liquid separation pipe is provided with gaseous phase outlet and liquid-phase outlet.
In above-mentioned absorption reactor thermally, described liquid film generator tube is provided with gas phase entrance and liquid phase material entrance, and described gas phase entrance is arranged on the upper end of the inner barrel of liquid film generator tube, and described liquid phase material entrance is arranged on the sidewall of outer cylinder body of liquid film generator tube.
In above-mentioned absorption reactor thermally, described liquid channel is the one in triangle, circle, strip or continuous annular space, it is preferred to annular space continuously.On liquid film generator tube inner barrel 1～12 times of the liquid phase material entrance cross-sectional area that the gross area is absorption reactor thermally of liquid channel, it is preferable that 3～5 times.
In above-mentioned absorption reactor thermally, the absorption liquid entrance of described reaction tube connects liquid phase distributor, and liquid phase distributor is arranged on reaction tube centrage, and injection absorbs liquid from top to bottom, and liquid phase distributor can arrange 1～10, it is preferable that 4～6.
In above-mentioned absorption reactor thermally, teeth groove is offered in the inner barrel bottom of described gas-liquid separation pipe, and tooth slot structure is fan-shaped teeth groove, square teeth groove, triangle teeth groove, it is preferred to triangle tooth slot structure, space width is 3mm～20mm, it is preferable that 5mm～8mm；Bottom it, angle is 15～90 °, it is preferable that 30～60 °.
In above-mentioned absorption reactor thermally, described gas-liquid separation pipe is provided with gaseous phase outlet and liquid-phase outlet, gaseous phase outlet is arranged on the sidewall of the outer cylinder body of gas-liquid separation 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.
Sour gas of the present invention produces in the method for sodium bicarbonate, and described solid-liquid separator includes housing, drivewheel, driven pulley, filter bag, scraper plate and dividing plate；nullDescribed solid-liquid separator is divided into feed zone、Solid-liquid displacement zone and discharge zone，Described feed zone is connected with the material inlet of housing upper，In the middle part of described solid-liquid displacement zone is arranged in housing，By drivewheel、Driven pulley、Scraper plate、Filter bag is constituted，The filter bag passing through to be provided with uniform sieve aperture between drivewheel with driven pulley is connected，Described scraper plate is arranged in inner walls，Blade surface and drivewheel surface are tangent relation，And between scraper plate and drivewheel, have certain interval，Described scraper plate is for scraping the crystal on filter bag，Described discharge zone is positioned at lower housing portion，Solid phase discharge zone and liquid phase discharge zone it is divided into by dividing plate，Solid-phase material outlet it is provided with bottom described solid phase discharge zone，Described liquid phase discharge zone is provided with liquid phase material outlet，Described dividing plate is positioned at immediately below scraper shaft line position，Dividing plate lower end is fixed on solid-liquid separator housing bottom，Dividing plate upper end and drivewheel have certain interval.
Sour gas of the present invention produces in the method for sodium bicarbonate, and described scrubber includes housing, upper cover and low head；Described enclosure interior arranges deflection plate, described deflection plate arranges multilamellar, deflection plate is arch, it is set in sequence on cylinder inboard wall, deflection plate is lateral inclination baffling form, the slanted angle of deflection plate and inner walls is 30～65 °, it is preferably 45～60 °, the deflection plate of adjacent two-stage is dislocation, order is arranged, realize multistage cross flow high-efficient contact, described upper cover is connected with material inlet pipe, described lower housing portion side is connected with alkali liquor inlet pipe, described housing upper side is connected with washing liquor exhaust pipe, described low head is connected with solid matter outlet pipe, star-wheel outlet valve is set in solid matter outlet pipe, realize solid phase discharging.
Sour gas of the present invention produces in the device of sodium bicarbonate, and described cyclone separator, air slaking pneumatic conveyer can the products of market relevant model on sale.
The present invention provides a kind of device utilizing sour gas to produce sodium bicarbonate, and described device includes absorption reactor thermally, solid-liquid separator, scrubber, air slaking air conveyor, cleaning mixture pans, cyclone separator and weighing sack-filling machine；The gas phase entrance of described absorption reactor thermally is connected with sour gas suction line, the liquid-phase outlet of absorption reactor thermally is connected with the entrance of solid-liquid separator, the liquid-phase outlet of solid-liquid separator divides two-way, and wherein a road is connected with the liquid phase material entrance of absorption reactor thermally, and a road is connected with product storage tank；The solid-phase outlet of solid-liquid separator is connected with the entrance of scrubber, the cleaning mixture entrance of scrubber is connected with alkali liquor inlet pipeline, the cleaning mixture outlet of scrubber is connected with the entrance of cleaning mixture pans, the outlet of cleaning mixture pans is connected with the absorption liquid entrance of absorption reactor thermally, the outlet of scrubber is connected with air slaking air conveyor, the liquid-phase outlet of air slaking air conveyor is connected with cleaning mixture pans, the material outlet of air slaking air conveyor is connected with cyclone separator, and the lower part outlet of cyclone separator is connected with weighing sack-filling machine.The gaseous phase outlet of absorption reactor thermally connects torch emptying process after burning.
Sour gas of the present invention produces in the device of sodium bicarbonate, described absorption reactor thermally is made up of upper, middle and lower segment, wherein, epimere is liquid film generator tube, stage casing is reaction tube, hypomere is gas-liquid separation pipe, and described liquid film generator tube, reaction tube, gas-liquid separation pipe go to upper and lower and be connected in series, and is that same axis is arranged；
Described liquid film generator tube is made up of outer cylinder body, inner barrel, upper annular closure dish and lower annular closure dish, the inner barrel of liquid film generator tube is offered in level, some liquid channels of annular spread, and liquid film generator tube is provided with gas phase entrance and liquid phase material entrance；
Described reaction tube is from top to bottom followed successively by feed zone, contraction section, trunnion section, expansion segment and discharging section, the feed zone upper end of described reaction tube is connected with the inner barrel lower end of liquid film generator tube, the tube wall of reaction tube is provided with absorption liquid entrance, absorbs liquid entrance and is positioned at trunnion section top；
Described 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 is connected with the discharging section lower end of reaction tube, and gas-liquid separation pipe is provided with gaseous phase outlet and liquid-phase outlet.
In above-mentioned absorption reactor thermally, described liquid film generator tube is provided with gas phase entrance and liquid phase material entrance, and described gas phase entrance is arranged on the upper end of the inner barrel of liquid film generator tube, and described liquid phase material entrance is arranged on the sidewall of outer cylinder body of liquid film generator tube.
In above-mentioned absorption reactor thermally, described liquid channel is the one in triangle, circle, strip or continuous annular space, it is preferred to annular space continuously.On liquid film generator tube inner barrel 1～12 times of the liquid phase material entrance cross-sectional area that the gross area is absorption reactor thermally of liquid channel, it is preferable that 3～5 times.
In above-mentioned absorption reactor thermally, the absorption liquid entrance of described reaction tube connects liquid phase distributor, and liquid phase distributor is arranged on reaction tube centrage, and injection absorbs liquid from top to bottom, and liquid phase distributor can arrange 1～10, it is preferable that 4～6.
In above-mentioned absorption reactor thermally, teeth groove is offered in the inner barrel bottom of described gas-liquid separation pipe, and tooth slot structure is fan-shaped teeth groove, square teeth groove, triangle teeth groove, it is preferred to triangle tooth slot structure, space width is 3mm～20mm, it is preferable that 5mm～8mm；Bottom it, angle is 15～90 °, it is preferable that 30～60 °.
In above-mentioned absorption reactor thermally, described gas-liquid separation pipe is provided with gaseous phase outlet and liquid-phase outlet, gaseous phase outlet is arranged on the sidewall of the outer cylinder body of gas-liquid separation 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.
Sour gas of the present invention produces in the device of sodium bicarbonate, and described solid-liquid separator includes housing, drivewheel, driven pulley, filter bag, scraper plate and dividing plate；nullDescribed solid-liquid separator is divided into feed zone、Solid-liquid displacement zone and discharge zone，Described feed zone is connected with the material inlet of housing upper，In the middle part of described solid-liquid displacement zone is arranged in housing，By drivewheel、Driven pulley、Scraper plate、Filter bag is constituted，The filter bag passing through to be provided with uniform sieve aperture between drivewheel with driven pulley is connected，Described scraper plate is arranged in inner walls，Blade surface and drivewheel surface are tangent relation，And between scraper plate and drivewheel, have certain interval，Described scraper plate is for scraping the crystal on filter bag，Described discharge zone is positioned at lower housing portion，Solid phase discharge zone and liquid phase discharge zone it is divided into by dividing plate，Solid-phase material outlet it is provided with bottom described solid phase discharge zone，Described liquid phase discharge zone is provided with liquid phase material outlet，Described dividing plate is positioned at immediately below scraper shaft line position，Dividing plate lower end is fixed on solid-liquid separator housing bottom，Dividing plate upper end and drivewheel have certain interval.
Sour gas of the present invention produces in the device of sodium bicarbonate, and described scrubber includes housing, upper cover and low head；Described enclosure interior arranges deflection plate, described deflection plate arranges multilamellar, deflection plate is arch, it is set in sequence on cylinder inboard wall, deflection plate is lateral inclination baffling form, the slanted angle of deflection plate and inner walls is 30～65 °, it is preferably 45～60 °, the deflection plate of adjacent two-stage is dislocation, order is arranged, realize multistage cross flow high-efficient contact, described upper cover is connected with material inlet pipe, described lower housing portion side is connected with alkali liquor inlet pipe, described housing upper side is connected with washing liquor exhaust pipe, described low head is connected with solid matter outlet pipe, star-wheel outlet valve is set in solid matter outlet pipe, realize solid phase discharging.
Compared with prior art, sour gas of the present invention produces the method for sodium bicarbonate and device has the advantage that
1, sour gas of the present invention produces in method and the device of sodium bicarbonate; with sodium carbonate be absorb liquid, with sodium hydroxide solution be cleaning mixture, with sodium hydrosulfide for protection liquid, reaction generate sodium bicarbonate solid separated after adopt sodium hydroxide solution carry out washing deodorization；Cleaning mixture after washing mixes with sodium carbonate and is continuing with as reactive absorption liquid.The method technique is simple, operating cost is low, it is achieved tail gas qualified discharge, and produces the sodium bicarbonate chemical products meeting national product quality standard.
2, sour gas of the present invention produces in method and the device of sodium bicarbonate, described absorption reaction process, by adopting the absorption reactor thermally described in Fig. 2, solid-liquid separator is separated the liquid phase material NaHS partial reflux obtained and returns absorption reactor thermally, liquid film is formed at absorption reactor thermally inwall, liquid film forms sealing coat between reaction tube and reacting field, it is prevented that the H in sour gas2S and the sodium sulfide of alkaline reaction generation, sodium carbonate crystalline particle attachment reaction device inwall, simultaneously with liquid film for heat-absorbing medium, take out reaction heat, effectively prevent product solution excessive vaporization, prevent that wall is overheated causes sodium sulfide, sodium carbonate excessive vaporization and crystallization wall built-up, it is ensured that stable production process, continuous long-term operation.
3, sour gas of the present invention produces in method and the device of sodium bicarbonate, adopt sodium hydroxide solution as cleaning mixture, by described material and sodium hydroxide solution counter current contacting, scrubber of the present invention washs, the built-in multilamellar deflection plate in described scrubber, it is achieved the multistage cross flow high-efficient contact of sodium hydroxide solution and material；Bottom is arranged by motor-driven star-wheel outlet valve, it is achieved solid phase discharging.Processing thus Sodium bicarbonate product being carried out washing deodorization, improving product economy benefit.
4, sour gas of the present invention produces in method and the device of sodium bicarbonate, air conveying, gas solid separation and six sections of processes of pack through absorption reaction, solid-liquid separation, washing, air slaking, pack after the washing deodorization of product sodium bicarbonate, produce the Sodium bicarbonate product being readily transported and storing, improve product economy benefit.
5, sour gas of the present invention produces in the method for sodium bicarbonate and device compared with prior art, and equipment scale is little, and operating cost is few, and operating cost is few, and energy consumption is low, and technique is simple, while producing chemical products, it is achieved sour gas qualified discharge.
Accompanying drawing explanation
Fig. 1 is that the present invention utilizes sour gas to produce method and the device schematic flow sheet of sodium bicarbonate.
Fig. 2 is absorption reactor thermally structural representation of the present invention.
Fig. 3 is solid-liquid separator structural representation of the present invention.
Fig. 4 is solid-liquid separator left view of the present invention.
Tu5Shi scrubber of the present invention structural representation.
Detailed description of the invention
As it is shown in figure 1, the present invention provides a kind of device utilizing sour gas to produce sodium bicarbonate, described device includes absorption reactor thermally 1, solid-liquid separator 2, scrubber 4, air slaking air conveyor 5, cleaning mixture pans 6, cyclone separator 7 and weighing sack-filling machine 9；The gas phase entrance of described absorption reactor thermally 1 is connected with sour gas suction line 10, the liquid-phase outlet of absorption reactor thermally is connected with the entrance of solid-liquid separator 2, the liquid-phase outlet of solid-liquid separator 2 divides two-way, wherein a road 18 is connected with the liquid phase material entrance of absorption reactor thermally, and an outer row in road 19 is connected with product storage tank；The solid-phase outlet of solid-liquid separator 2 is connected with the entrance of scrubber 4, the cleaning mixture entrance of scrubber is connected with alkali liquor inlet pipeline 22, the cleaning mixture outlet of scrubber is connected with the entrance of cleaning mixture pans 6, the outlet of cleaning mixture pans 6 is connected with the absorption liquid entrance of absorption reactor thermally 1, the outlet of scrubber 4 is connected with air slaking air conveyor 5, the liquid-phase outlet of air slaking air conveyor 5 is connected with cleaning mixture pans 6, the material outlet of air slaking air conveyor 5 is connected with cyclone separator 8, the lower part outlet of cyclone separator 8 is connected with weighing sack-filling machine 9, the gaseous phase outlet of absorption reactor thermally connects torch emptying process after burning.
As shown in Figure 2, the present invention utilizes sour gas to produce in method and the device of sodium bicarbonate and hydrogen sulfide gas, described absorption reactor thermally 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 that same axis is arranged；
Described liquid film generator tube is made up of outer cylinder body 34, inner barrel 33, upper annular closure dish 32 and lower annular closure dish 36, the inner barrel 33 of liquid film generator tube is offered in level, some liquid channels 35 of annular spread, liquid film generator tube is provided with gas phase entrance 32 and liquid phase material entrance 30, described gas phase entrance 32 is arranged on the upper end of the inner barrel 33 of liquid film generator tube, described liquid phase material entrance 30 is arranged on the sidewall of outer cylinder body 34 of liquid film generator tube, described liquid channel 35 is the one in triangle, circle, strip or continuous annular space, it is preferred to annular space continuously.
Described 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, feed zone 39 upper end of described reaction tube is connected with inner barrel 33 lower end of liquid film generator tube, the tube wall of reaction tube is provided with absorption liquid entrance 37, absorb liquid entrance 37 and be positioned at trunnion section 41 top, the absorption liquid entrance 37 of described reaction tube connects liquid phase distributor 38, liquid phase distributor 38 is arranged on reaction tube centrage, injection absorbs liquid from top to bottom, liquid phase distributor 38 can arrange 1～10, it is preferable that 4～6；
Described gas-liquid separation pipe is made up of upper cover plate 47, gas-liquid separation pipe inner barrel 45, gas-liquid separation pipe outer cylinder body 46 and bottom plate 49；Inner barrel 45 top of gas-liquid separation pipe is connected with discharging section 43 lower end of reaction tube, gas-liquid separation pipe is provided with gaseous phase outlet 44 and liquid-phase outlet 50, teeth groove 48 is offered in inner barrel 45 bottom stating gas-liquid separation pipe, the structure of teeth groove 48 is fan-shaped teeth groove, square teeth groove, triangle teeth groove, it is preferably triangle tooth slot structure, space width is 3mm～20mm, it is preferable that 5mm～8mm；Bottom it, angle is 15～90 °, preferably 30～60 °, described gaseous phase outlet 44 is arranged on the sidewall of outer cylinder body 46 of gas-liquid separation pipe, and the position of gaseous phase outlet 44 is higher than the lower end outlet of the inner barrel 45 of gas-liquid separation pipe, and liquid-phase outlet 50 is positioned at the bottom of the outer cylinder body 46 of gas-liquid separation pipe.
As shown in Figure 3,4, sour gas of the present invention produces in method and the device of sodium bicarbonate, and described solid-liquid separator includes housing 57, drivewheel 52, driven pulley 58, filter bag 51, scraper plate 61, dividing plate 53；Described solid-liquid separator is divided into feed zone, solid-liquid displacement zone and discharge zone, described feed zone is connected with the material inlet pipe 56 on housing 57 top, in the middle part of described solid-liquid displacement zone is arranged in housing 57, it is made up of drivewheel 52, driven pulley 58, scraper plate 61, filter bag 51, the filter bag 51 passing through to be provided with uniform sieve aperture between drivewheel 52 with driven pulley 58 is connected, and described drivewheel 52 drives operating by motor.Described scraper plate 61 arranges on housing 57 inwall, scraper plate 61 surface and drivewheel 52 surface are tangent relation, and have certain interval between scraper plate 61 and drivewheel 52, described scraper plate 61 is for scraping the crystal on filter bag 51, described discharge zone is positioned at housing 57 bottom, solid phase discharge zone 54 and liquid phase discharge zone 60 it is divided into by dividing plate 53, it is provided with solid-phase material outlet 55 bottom described solid phase discharge zone 54, described liquid phase discharge zone 60 is provided with liquid phase material outlet 59, described dividing plate 53 is positioned at immediately below scraper plate 61 axial location, the lower end of dividing plate 53 is fixed on the bottom of solid-liquid separator housing 57, the upper end of dividing plate 53 and drivewheel 52 have certain interval.Described liquid-phase outlet 50 material from absorption reactor thermally 1 is the product of absorption reactor thermally, its product is mainly sodium bicarbonate and NaHS, this generation liquid enters solid-liquid separator through the material inlet pipe 56 of solid-liquid separator, transmission together with the filter bag of the motion arranged with wheel drive surfaces along with drivewheel, the configured sieve aperture on filter bag of NaHS liquid in this generation liquid enters liquid phase discharge zone 60, respectively enters absorption reactor thermally as liquid film with as product carrying device through liquid phase material outlet 59；Solid crystal remains in filter bag transmission, and when being transferred to the wiper positions being arranged in inner walls, crystal is scraped by scraper plate, and solid crystal enters solid phase discharge zone 54, enters scrubber 4 through solid-phase material outlet 55.
As it is shown in figure 5, sour gas of the present invention produces in the device of sodium bicarbonate, described scrubber includes housing 71, upper cover 72 and low head 73；Described housing 71 is internal arranges deflection plate 74, and described deflection plate 74 arranges multilamellar, and deflection plate is arch, is set in sequence on cylinder inboard wall, and deflection plate is lateral inclination baffling form, and the slanted angle of deflection plate and inner walls is 30～65 °, it is preferred to 45～60 °.The deflection plate of adjacent two-stage is dislocation, order is arranged, realize multistage cross flow high-efficient contact, described upper cover 72 is connected with material inlet pipe 75, described housing 71 lower side is connected with alkali liquor inlet pipe 76, described housing 71 upper side is connected with washing liquor exhaust pipe 77, described low head 73 is connected with solid matter outlet pipe 78, arranges star-wheel outlet valve 79 in solid matter outlet pipe 78, it is achieved solid phase discharging.The solid material sodium bicarbonate being mixed with a small amount of NaHS residual liquid after solid-liquid separator separation enters scrubber, under the effect of deflection plate 72, solid material mixes with up sodium hydroxide solution repeatedly, realize the washing deodorization of sodium bicarbonate, in the process, sodium bicarbonate is carried secretly NaHS and part sodium hydroxide generate sodium sulfide and obtain cleaning mixture entrance cleaning mixture pans.
In conjunction with Fig. 1～Fig. 5, the present invention utilize the method that sour gas produces sodium bicarbonate further illustrate, sour gas from sour gas suction line 10 initially enters absorption reactor thermally 1, contact with the absorption liquid sodium carbonate carried through pipeline 12, carry out with gas phase for continuous phase, liquid phase is gas-liquid mass transfer and the reaction of dispersion phase, and reacted sour gas passes through clean gas outlet pipeline 20 qualified discharge through the gaseous phase outlet of absorption reactor thermally 1；The reaction solution that absorption reactor thermally 1 obtains enters solid-liquid separator 2 through pipeline 14; after solid-liquid separator 2 is easily separated; 21 points of two-way of the liquid phase material obtained; the first via 18 returns absorption reactor thermally as protection liquid through the liquid phase material entrance of absorption reactor thermally; when in the outer cylinder body of liquid film generator tube, liquid level exceedes the liquid channel liquid level of inner barrel; liquid phase material is distributed with wall manifold state on the inwall of liquid film generator tube inner barrel; form uniform flow liquid film; liquid film forms sealing coat between reaction tube and reacting field, it is prevented that the H in sour gas2S、CO2The sodium sulfide, the sodium carbonate crystalline particle attachment reaction device inwall that generate is reacted with absorbing liquid, reaction drop is sent in punching simultaneously, prevent wall built-up, simultaneously with liquid film for heat-absorbing medium, take out reaction heat in time, effectively prevent product solution excessive vaporization, it is prevented that wall is overheated causes sodium sulfide, sodium carbonate excessive vaporization and crystallization wall built-up, it is ensured that stable production process, continuous long-term operation.2nd tunnel 19 is as product；The solid sodium bicarbonate material obtained enters scrubber 4 through pipeline 15, with the sodium hydroxide solution counter current contacting entered through alkali liquor inlet pipeline 22, under the effect of deflection plate, sodium bicarbonate material mixes with up sodium hydroxide solution repeatedly, realize the washing deodorization of sodium bicarbonate, in the process, NaHS and part sodium hydroxide that sodium bicarbonate is carried secretly generate sodium sulfide, and cleaning mixture enters cleaning mixture pans through pipeline 16.The residual liquid that air slaking power transfer 5 obtains enters cleaning mixture pans through pipeline 17, and the scrubbed liquid line pump 7 of material of cleaning mixture pans is carried by pipeline 13, and after mixing with sodium bicarbonate absorption liquid 11, the absorption liquid as absorption reactor thermally 1 uses.Air slaking air conveyor 5 is through pipeline 24 transmitting power wind, solid-phase material from scrubber is delivered to cyclone separator 8, after cyclone separator 8 separates, gas through pipeline 23 from cyclone separator 8 discharger, material after separating with air enters weighing sack-filling machine and carries out pack packing processes, then sells as product.So far complete to utilize sour gas produce sodium bicarbonate solid product and sodium hydrosulfide product and realize the technical process of sour gas purification qualified discharge.
The reaction effect of the present invention is described below in conjunction with embodiment, but does not therefore limit the scope of the invention.
Embodiment 1
Adopt processing method as shown in Figure 1 and device, with sour gas for raw material, with sodium carbonate for absorbing liquid, with sodium hydroxide solution for cleaning mixture, react.CO in sour gas2Volume fraction is 7%, H2S volume fraction is 92%, and hydro carbons volume fraction is 1%.NaOH solution mass concentration is 38%, Na2CO3Concentration of polymer solution is 20%.
In embodiment 1, adopt device as shown in Figure 1,2,3, 4.In embodiment 1, NaHS product liquid refluxing portion is product liquid total amount 40%, and the liquid-gas ratio absorbing liquid and sour gas in absorption reactor thermally is 5L/m3.Controlling reaction temperature is between 80 DEG C-85 DEG C, and reaction result is in Table 1.
Comparative example 1
Identical with embodiment 1, difference is described absorption reactor thermally is conventional retort.
Comparative example 2
Identical with embodiment 1, difference be the liquid phase material that obtains of described solid-liquid separator all as product, do not return absorption reactor thermally.
Table 1 embodiment and comparative example reaction result
Claims (25)
1. utilizing the method that sour gas produces sodium bicarbonate, described method includes that absorption reaction, solid-liquid separation, washing, air slaking are air conveying, gas solid separation and six processes of pack, it is achieved tail gas qualified discharge, and produces Sodium bicarbonate product；Described method specifically comprises the following steps that
(1) sour gas enters absorption reactor thermally, and with absorption liquid sodium carbonate haptoreaction, the purified qualified discharge of reacted sour gas, the reaction solution obtained enters solid-liquid separator, obtains solid-phase material and liquid phase material after separation；
(2) the liquid phase material part that step (1) obtains returns absorption reactor thermally through the liquid phase material entrance of absorption reactor thermally, collects partly as product and stores；
(3) solid-phase material that step (1) obtains enters scrubber, washs with sodium hydroxide solution counter current contacting, as absorbing liquid return absorption reactor thermally after the scrubbed liquid pans of cleaning mixture obtained after washing；
(4) in step (3), the bottoms effluent of scrubber enters air slaking air conveyor, the product residual liquid of elimination enters cleaning mixture pans, material after elimination product residual liquid is sent to cyclone separator and is easily separated, separate the gas emptying obtained, separate the solid sodium bicarbonate obtained and send to pack of weighing, obtain Sodium bicarbonate product.
2. in accordance with the method for claim 1, it is characterised in that: the reaction temperature in described absorption reactor thermally is 70～100 DEG C, it is preferred to 80～95 DEG C.
3. the method described in claim 1 or 2, it is characterised in that: the liquid-gas ratio absorbing liquid and sour gas in described absorption reactor thermally is 3～20L/m3, it is preferable that 5～10L/m3。
4. the method according to any one of claims 1 to 3, it is characterised in that: the volume flow of the liquid phase material of the described return absorption reactor thermally of step (2) accounts for the 30%～70% of liquid phase material total volumetric flow rate, it is preferable that 40%～50%.
5. the method according to any one of Claims 1-4, it is characterized in that: described scrubber is normal-temperature operation, sodium hydroxide solution and product liquid are counter current contacting, and the volume flow ratio of the solid-phase material of described sodium hydroxide solution and entrance scrubber is 1/3 ~ 1/1, it is preferred to 2/3 ~ 1/2.
6. the method according to any one of claim 1 to 5, it is characterised in that: described sour gas includes hydrogen sulfide and carbon dioxide.
7. the method according to any one of claim 1 to 6, it is characterised in that: described sodium hydroxide solution mass concentration is 20%～60%, it is preferred to 32%～40%.
8. the method according to any one of claim 1 to 7, it is characterised in that: described sodium carbonate liquor mass concentration is 10%～30%, it is preferred to 15%～25%.
9. the method according to any one of claim 1 to 8, it is characterized in that: described absorption reactor thermally is made up of upper, middle and lower segment, wherein, epimere is liquid film generator tube, stage casing is reaction tube, hypomere is gas-liquid separation pipe, and described liquid film generator tube, reaction tube, gas-liquid separation pipe go to upper and lower and be connected in series, and is that same axis is arranged；Described liquid film generator tube is made up of outer cylinder body, inner barrel, upper annular closure dish and lower annular closure dish, the inner barrel of liquid film generator tube is offered in level, some liquid channels of annular spread, and liquid film generator tube is provided with gas phase entrance and liquid phase material entrance；
Described reaction tube is from top to bottom followed successively by feed zone, contraction section, trunnion section, expansion segment and discharging section, the feed zone upper end of described reaction tube is connected with the inner barrel lower end of liquid film generator tube, the tube wall of reaction tube is provided with absorption liquid entrance, absorbs liquid entrance and is positioned at trunnion section top；
Described 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 is connected with the discharging section lower end of reaction tube, and gas-liquid separation pipe is provided with gaseous phase outlet and liquid-phase outlet.
10. in accordance with the method for claim 9, it is characterized in that: described liquid film generator tube is provided with gas phase entrance and liquid phase material entrance, described gas phase entrance is arranged on the upper end of the inner barrel of liquid film generator tube, and described liquid phase material entrance is arranged on the sidewall of outer cylinder body of liquid film generator tube.
11. the method described in claim 9 or 10, it is characterised in that: described liquid channel is the one in triangle, circle, strip or continuous annular space, it is preferred to annular space continuously.
12. the method according to any one of claim 9 to 11, it is characterized in that: the absorption liquid entrance of described reaction tube connects liquid phase distributor, and liquid phase distributor is arranged on reaction tube centrage, injection absorbs liquid from top to bottom, liquid phase distributor can arrange 1～10, it is preferable that 4～6.
13. the method described in claim 9 to 12, it is characterized in that: teeth groove is offered in the inner barrel bottom of described gas-liquid separation pipe, tooth slot structure is fan-shaped teeth groove, square teeth groove, triangle teeth groove, it is preferred to triangle tooth slot structure, space width is 3mm～20mm, it is preferable that 5mm～8mm；Bottom it, angle is 15～90 °, it is preferable that 30～60 °.
14. the method described in claim 9 to 13, it is characterized in that: described gas-liquid separation pipe is provided with gaseous phase outlet and liquid-phase outlet, gaseous phase outlet is arranged on the sidewall of the outer cylinder body of gas-liquid separation 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.
15. in accordance with the method for claim 1, it is characterised in that: described solid-liquid separator includes housing, drivewheel, driven pulley, filter bag, scraper plate and dividing plate；nullDescribed solid-liquid separator is divided into feed zone、Solid-liquid displacement zone and discharge zone，Described feed zone is connected with the material inlet of housing upper，In the middle part of described solid-liquid displacement zone is arranged in housing，By drivewheel、Driven pulley、Scraper plate、Filter bag is constituted，The filter bag passing through to be provided with uniform sieve aperture between drivewheel with driven pulley is connected，Described scraper plate is arranged in inner walls，Blade surface and drivewheel surface are tangent relation，And between scraper plate and drivewheel, have certain interval，Described scraper plate is for scraping the crystal on filter bag，Described discharge zone is positioned at lower housing portion，Solid phase discharge zone and liquid phase discharge zone it is divided into by dividing plate，Solid-phase material outlet it is provided with bottom described solid phase discharge zone，Described liquid phase discharge zone is provided with liquid phase material outlet，Described dividing plate is positioned at immediately below scraper shaft line position，Dividing plate lower end is fixed on solid-liquid separator housing bottom，Dividing plate upper end and drivewheel have certain interval.
16. in accordance with the method for claim 1, it is characterised in that: described scrubber includes housing, upper cover and low head；Described enclosure interior arranges deflection plate, described deflection plate arranges multilamellar, deflection plate is arch, it is set in sequence on cylinder inboard wall, deflection plate is lateral inclination baffling form, the slanted angle of deflection plate and inner walls is 30～65 °, it is preferably 45～60 °, the deflection plate of adjacent two-stage is dislocation, order is arranged, realize multistage cross flow high-efficient contact, described upper cover is connected with material inlet pipe, described lower housing portion side is connected with alkali liquor inlet pipe, described housing upper side is connected with washing liquor exhaust pipe, described low head is connected with solid matter outlet pipe, star-wheel outlet valve is set in solid matter outlet pipe, realize solid phase discharging.
17. utilize sour gas to produce a device for sodium bicarbonate, described device includes absorption reactor thermally, solid-liquid separator, scrubber, air slaking air conveyor, cleaning mixture pans, cyclone separator and weighing sack-filling machine；The gas phase entrance of described absorption reactor thermally is connected with sour gas suction line, the liquid-phase outlet of absorption reactor thermally is connected with the entrance of solid-liquid separator, the liquid-phase outlet of solid-liquid separator divides two-way, and wherein a road is connected with the liquid phase material entrance of absorption reactor thermally, and a road is connected with product storage tank；The solid-phase outlet of solid-liquid separator is connected with the entrance of scrubber, the cleaning mixture entrance of scrubber is connected with alkali liquor inlet pipeline, the cleaning mixture outlet of scrubber is connected with the entrance of cleaning mixture pans, the outlet of cleaning mixture pans is connected with the absorption liquid entrance of absorption reactor thermally, the outlet of scrubber is connected with air slaking air conveyor, the liquid-phase outlet of air slaking air conveyor is connected with cleaning mixture pans, the material outlet of air slaking air conveyor is connected with cyclone separator, the lower part outlet of cyclone separator is connected with weighing sack-filling machine, the gaseous phase outlet of absorption reactor thermally connects torch emptying process after burning.
18. the device described in claim 17, it is characterized in that: described absorption reactor thermally is made up of upper, middle and lower segment, wherein, epimere is liquid film generator tube, stage casing is reaction tube, hypomere is gas-liquid separation pipe, and described liquid film generator tube, reaction tube, gas-liquid separation pipe go to upper and lower and be connected in series, and is that same axis is arranged；
Described liquid film generator tube is made up of outer cylinder body, inner barrel, upper annular closure dish and lower annular closure dish, the inner barrel of liquid film generator tube is offered in level, some liquid channels of annular spread, and liquid film generator tube is provided with gas phase entrance and liquid phase material entrance；
Described reaction tube is from top to bottom followed successively by feed zone, contraction section, trunnion section, expansion segment and discharging section, the feed zone upper end of described reaction tube is connected with the inner barrel lower end of liquid film generator tube, the tube wall of reaction tube is provided with absorption liquid entrance, absorbs liquid entrance and is positioned at trunnion section top；
Described 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 is connected with the discharging section lower end of reaction tube, and gas-liquid separation pipe is provided with gaseous phase outlet and liquid-phase outlet.
19. the device described in claim 18, it is characterized in that: described liquid film generator tube is provided with gas phase entrance and liquid phase material entrance, described gas phase entrance is arranged on the upper end of the inner barrel of liquid film generator tube, and described liquid phase material entrance is arranged on the sidewall of outer cylinder body of liquid film generator tube.
20. the device described in claim 18 or 19, it is characterised in that: described liquid channel is the one in triangle, circle, strip or continuous annular space, it is preferred to annular space continuously.
21. the device according to any one of claim 18 to 20, it is characterized in that: the absorption liquid entrance of described reaction tube connects liquid phase distributor, and liquid phase distributor is arranged on reaction tube centrage, injection absorbs liquid from top to bottom, liquid phase distributor can arrange 1～10, it is preferable that 4～6.
22. the device according to any one of claim 18 to 21, it is characterized in that: teeth groove is offered in the inner barrel bottom of described gas-liquid separation pipe, tooth slot structure is fan-shaped teeth groove, square teeth groove, triangle teeth groove, it is preferably triangle tooth slot structure, space width is 3mm～20mm, it is preferable that 5mm～8mm；Bottom it, angle is 15～90 °, it is preferable that 30～60 °.
23. the device according to any one of claim 18 to 22, it is characterized in that: described gas-liquid separation pipe is provided with gaseous phase outlet and liquid-phase outlet, gaseous phase outlet is arranged on the sidewall of the outer cylinder body of gas-liquid separation 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.
24. the device described in claim 18, it is characterised in that: described solid-liquid separator includes housing, drivewheel, driven pulley, filter bag, scraper plate and dividing plate；nullDescribed solid-liquid separator is divided into feed zone、Solid-liquid displacement zone and discharge zone，Described feed zone is connected with the material inlet of housing upper，In the middle part of described solid-liquid displacement zone is arranged in housing，By drivewheel、Driven pulley、Scraper plate、Filter bag is constituted，The filter bag passing through to be provided with uniform sieve aperture between drivewheel with driven pulley is connected，Described scraper plate is arranged in inner walls，Blade surface and drivewheel surface are tangent relation，And between scraper plate and drivewheel, have certain interval，Described scraper plate is for scraping the crystal on filter bag，Described discharge zone is positioned at lower housing portion，Solid phase discharge zone and liquid phase discharge zone it is divided into by dividing plate，Solid-phase material outlet it is provided with bottom described solid phase discharge zone，Described liquid phase discharge zone is provided with liquid phase material outlet，Described dividing plate is positioned at immediately below scraper shaft line position，Dividing plate lower end is fixed on solid-liquid separator housing bottom，Dividing plate upper end and drivewheel have certain interval.
25. the device described in claim 18, it is characterised in that: described scrubber includes housing, upper cover and low head；Described enclosure interior arranges deflection plate, described deflection plate arranges multilamellar, deflection plate is arch, it is set in sequence on cylinder inboard wall, deflection plate is lateral inclination baffling form, the slanted angle of deflection plate and inner walls is 30～65 °, it is preferably 45～60 °, the deflection plate of adjacent two-stage is dislocation, order is arranged, realize multistage cross flow high-efficient contact, described upper cover is connected with material inlet pipe, described lower housing portion side is connected with alkali liquor inlet pipe, described housing upper side is connected with washing liquor exhaust pipe, described low head is connected with solid matter outlet pipe, star-wheel outlet valve is set in solid matter outlet pipe, realize solid phase discharging.
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