CN104762110A - Coking gas desulfuration-regeneration integrated column having multilayer spray structure - Google Patents
Coking gas desulfuration-regeneration integrated column having multilayer spray structure Download PDFInfo
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- CN104762110A CN104762110A CN201510110907.8A CN201510110907A CN104762110A CN 104762110 A CN104762110 A CN 104762110A CN 201510110907 A CN201510110907 A CN 201510110907A CN 104762110 A CN104762110 A CN 104762110A
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K1/00—Purifying combustible gases containing carbon monoxide
- C10K1/002—Removal of contaminants
- C10K1/003—Removal of contaminants of acid contaminants, e.g. acid gas removal
- C10K1/004—Sulfur containing contaminants, e.g. hydrogen sulfide
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K1/00—Purifying combustible gases containing carbon monoxide
- C10K1/08—Purifying combustible gases containing carbon monoxide by washing with liquids; Reviving the used wash liquors
- C10K1/10—Purifying combustible gases containing carbon monoxide by washing with liquids; Reviving the used wash liquors with aqueous liquids
- C10K1/12—Purifying combustible gases containing carbon monoxide by washing with liquids; Reviving the used wash liquors with aqueous liquids alkaline-reacting including the revival of the used wash liquors
- C10K1/121—Purifying combustible gases containing carbon monoxide by washing with liquids; Reviving the used wash liquors with aqueous liquids alkaline-reacting including the revival of the used wash liquors containing NH3 only (possibly in combination with NH4 salts)
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Abstract
A coking gas desulfuration-regeneration integrated column having multilayer spray structure. In the invention, a conventional desulfuration technology device in the prior art is changed into an integrated column-type structure design in which a regenerated tail gas washing unit, a regenerating unit, a desulfuration unit and a desulfurated rich solution storage and reaction unit are optimized. In addition, in the four layers of filling material supports in the desulfuration unit are provided with corresponding coil-type re-cooling apparatuses and a two-layered spray structure is arranged at the upper part and the middle part of the desulfuration unit, so that the content of hydrogen sulfide in desulfurated coking gas is low. The regenerated tail gas washing unit installed on the top of the regenerating unit, wherein a tail gas washing process includes two parts: (1) feeding fresh water or a desulfuration solution, which satisfies circulation water equilibrium, to the upper part of interior of the tail gas washing unit; and (2) performing tail gas desulfuration to sprayed fresh water or desulfuration solution to form a washing solution, feeding the washing solution to the upper part of interior of the tail gas washing unit again through a circulation pump, jetting the fresh water or the desulfuration solution or jetting the washing solution by a high-pressure atomization spray gun to perform double tail gas desulfuration washing. By such a process, the operation of integrated column-type desulfuration and regeneration of coking gas is achieved.
Description
Technical field
The invention belongs to the technical field of Coal Chemical Industry coking desulfurization, be specifically related to a kind of coke gas desulfurization regeneration integrated tower with Multi-layer sprinkling structure.
Background technology
Current existing iron and steel enterprise will perform more strict Air Pollutant Emission limit value, and the coking production enterprise in iron and steel enterprise is in the urgent need to finding suitable, efficient, economic reduction of discharging Treatment process.Because containing hydrogen sulfide and prussic acid in coke gas, not only severe contamination atmospheric environment, and also when coke gas is as iron and steel enterprise's metallurgical fuel, the objectionable impuritiess such as hydrogen sulfide have had a strong impact on steel product quality.
Traditional sulfur removal technology device of coke gas is relatively complicated, as shown in Figure 2, primarily of compositions such as thionizer, regenerator column, reactive tanks, its technical process the thick coke gas from a upper operation is entered through gas entry desulfurization lean solution counter current contact that thionizer bottom and tower top spray wash hydrogen sulfide in coke gas, and the clean coke gas removing hydrogen sulfide is sent to subsequent processing from the gas exit of tower top side; The sulfur removing pregnant solution flowed out from the sulfur removing pregnant solution outlet of thionizer bottom enters reactive tank through liquid seal trough by pipeline, pumps enter regenerator column regeneration after supplementing dropping catalyst solvent with rich solution recycle pump; The compressed gas inlet of pressurized air come from compressed air station injector and sulfur removing pregnant solution by regenerator column bottom regenerator column sulfur removing pregnant solution entrance and flow in regenerator column oxidation regeneration carried out to sulfur removing pregnant solution; Desulfurization lean solution after regeneration carries out spray desulfurization through regulator of level and outside connecting pipeline from the spray structure flowing into position, thionizer middle and upper part from the desulfurization lean solution outlet on regenerator column top; The sulphur foam that regenerator column tower top floatingly selects flows out from sulphur foam outlet and is sent to subsequent processing.
Traditional sulfur removal technology of coke gas, although can environmental pollution be alleviated, but also there is some weak point following: one is complex structure, whole desulphurization system main equipment quantity is many, as thionizer, regenerator column, reactive tank etc., floor space is large, and the wide distance of install pipeline, adds equipment investment cost; Two is complex process, and what regenerator column adopted is that pressurized air carries out the technique of oxidation regeneration to sulfur removing pregnant solution, must set up high-pressure air station like this, add equipment investment cost equally; Three is because equipment volume is large, type kind is many, pipelining distance, various losses in desulfurization operation process are all increased, as calorific loss, catalyst attrition etc., desulfuration efficiency decline, sweetening effectiveness certainly will be caused thorough, add production run cost, reduce efficiency.Tail gas particularly after regeneration is directly disposed to air without the regeneration tail gas diffusion mouth of any process from regenerator column tower top, and secondary pollution is serious, makes a very bad impression to environment.In addition, in current coke gas use the ature of coal of feed coal to have the trend of high sulfur-bearing, the sulphur content in coke gas must be caused to increase, therefore in coke gas sweetening process in the urgent need to adopting efficient desulfurization regeneration equipment.
Summary of the invention
The object of invention is: for solving the problem, the present invention is directed to the deficiency of existing traditional sulfur removal technology technology, provide a kind of coke gas desulfurization regeneration integrated tower with Multi-layer sprinkling structure that effectively can overcome above-mentioned deficiency, solve the problem, its objective is that floor space is little, pipelining apart from short, reduce equipment investment cost, simplify production process, reduce equipment energy consumption, improve desulfuration efficiency, avoid secondary environmental pollution.
Technical scheme: for achieving the above object, the present invention adopts following technical scheme:
There is the coke gas desulfurization regeneration integrated tower of Multi-layer sprinkling structure, it is characterized in that structure of the present invention adopts vertical one tower structure, be followed successively by the rear washing tail gas unit of regeneration from top to bottom, regeneration unit, desulfurization unit, rich solution storage reaction unit after desulfurization, above-mentioned 4 unit optimization design integrations are formed an entirety, its annexation is that internal structure is by rich solution storage reaction unit and desulfurization unit after segmentation desulfurization at the bottom of inner tower, by inner elliptical shape end socket segmentation desulfurization unit and regeneration unit, external structure is provided with the rear washing tail gas unit of regeneration, and desulfurization unit top and medium position are provided with two-layer spray structure, and on, lower two-layer spray structure all can be arranged to the form of one or more layers spray structure.
There is the coke gas desulfurization regeneration integrated tower of Multi-layer sprinkling structure, it is characterized in that the skirt part of tower bottom of the present invention is designed to rich solution storage reaction unit after desulfurization, by the annular seal arranged, so that rich solution solution after storing desulfurization, rich solution solution after rich solution solution circulation pump directly extracts desulfurization at the bottom of tower under the power-assisted of swirl injection pipe also presses people to be placed in each self-priming oxidation regeneration injector of tower top, injector suction air or oxygen enrichment is utilized to carry out oxidation regeneration to make rich solution solution enter regeneration unit through guide wire injection, after regenerative response, isolated sulphur foam is from flowing into sulphur foam regeneration tank, the desulfurization lean solution produced flows in the spray structure of position, hypomere desulfurization unit middle and upper part and the spray structure of medium position with outside connecting pipeline certainly through the regulator of level be arranged in regeneration unit, be provided with in different radii in each spray structure bottom, several high-pressure atomization spray guns of multilayer annular configuration, implement the dual composite atomizing of desulfurization lean solution adverse current to coke gas by the nozzle of high-pressure atomization spray gun to spray, coke gas is entered by side bottom desulfurization unit, sailed against the current by desulfurization unit bottom after the distribution of gas flow distribution device, by after the light porcelain packing of 4 layers or full porcelain filling layer and corresponding gas-liquid distributor in up process, with descending desulfurization lean solution solution convection current, after hydrogen sulfide content in washing absorption coke gas, become sulfur removing pregnant solution flow into bottom, and for keeping the cold operation of desulfurization whole process, arrange in 4 layers of packing layer support of desulfurization unit and corresponding coil tube type Aftercooling device is installed, hydrogen sulfide in coal gas reduces along with temperature, be desulfurized ammonia in lean solution to absorb, condensation, cohesion enters in the rich solution after desulfurization together afterwards, make the hydrogen sulfide content in the coke gas after desulfurization far below below the 20mg/ m3 of prior art, after flowing into the desulfurization of bottom, rich solution flows into rich solution storage reaction unit after the desulfurization of bottom after annular seal isolation coal gas, and then to be pumped to by rich solution solution after desulfurization at the bottom of tower to be placed in spray in each self-priming oxidation regeneration injector of tower top, through guide wire with rich solution solution circulation pump carry out oxidation regeneration in regeneration unit, after tail gas after regeneration enters into the regeneration that regeneration unit top connects, washing tail gas unit carries out washing tail gas desulfurization, and washing tail gas process comprises two portions: one is meet the new water of whole desulfurizing technology system recirculated water balance or doctor solution is sent into washing tail gas unit inner upper through piping, carried out tail gas desulfurization washing by the new water of high-pressure atomization lance ejection or doctor solution, two be spray new water or doctor solution carry out tail gas desulfurization washing after become washings, then washings is again sent into washing tail gas unit inner upper by recycle pump and pipeline, is carried out again tail gas desulfurization washing by high-pressure atomization lance ejection washings, and circular flow like this achieves the tower desulfurization regeneration work of one of coke gas desulfurization and regeneration.
As optimization: in desulfurization unit of the present invention, because adopting with ammonia is that alkali source carries out the technological process of liquid phase catalytic oxidation desulfurization absorption reaction to the cooking gas containing hydrogen sulfide sulfides, exothermic process is belonged in chemical engineering thermodynamics, in order to keep the cold operation of desulfurization whole process, arrange in 4 layers of packing layer support of desulfurization unit and be provided with corresponding coil tube type circulation Aftercooling device, the recycle heat for exothermic process in sweetening process cools, and be provided with at the upper position of desulfurization unit and medium position, lower two-layer compound spray structure, coke gas is first through lower floor's spray structure, doctor solution after atomization carries out first time with it and conducts heat to mix to contact with the adverse current of mass transfer and wash, hydrogen sulfide etc. in coal gas is absorbed in doctor solution, coke gas continues up again by upper strata spray structure, doctor solution and its of atomization carry out conducting heat for the second time mixing to contact with the adverse current of mass transfer and wash, the hydrogen sulfide etc. in coal gas is continued to be absorbed in doctor solution, make sweetening effectiveness more thorough, make the hydrogen sulfide content in the coke gas after desulfurization far below below the 20mg/ m3 of prior art, and on, lower two-layer spray structure all can be arranged to one or more layers spray structure.
As further optimization: after regeneration of the present invention, washing tail gas unit is connected with the rear washing tail gas unit of regeneration, after regeneration, the discharge outlet of tail gas is the entrance of the rear washing tail gas unit of regeneration, after regeneration, tail gas enters washing tail gas unit after regeneration through discharge outlet and carries out washing tail gas desulfurization, and washing tail gas process comprises two portions: one is meet the new water of whole desulfurizing technology system recirculated water balance or doctor solution is sent into washing tail gas unit inner upper through piping, carried out tail gas desulfurization washing by the new water of high-pressure atomization lance ejection or doctor solution; Two be spray new water or doctor solution carry out tail gas desulfurization washing after become washings, then washings again send into washing tail gas unit inner upper by recycle pump and pipeline, undertaken again by high-pressure atomization lance ejection washings tail gas desulfurization washing; Ammonia in all recyclable regeneration tail gas of above-mentioned two portions or the sulphur foam carried secretly, the washings absorbing ammonia overflows to regeneration unit by overflow spout and makes full use of further.
As further optimization: the high-pressure atomization spray tip that after regeneration of the present invention, washing tail gas unit and desulfurization unit use is that average spray particle size is about 100 μm, and the spray particle size of general desulfurization nozzle is about 1000-5000 μm, the specific surface area of mist unit spray liquid is more than 400 times of the latter, just can realize volatilization and be cooled to state of saturation after tail gas enters washing tail gas unit after regeneration in the several seconds; Drastically increase the Absorption Desulfurization efficiency of new water or doctor solution, only need the vapour-liquid ratio of 0.1-0.5L/m3 just can realize desulfurization up to standard, original sweet gas liquor ratio also can reduce, and decreases internal circulating load.
Beneficial effect: the present invention is by being changed to washing tail gas unit after regeneration, regeneration unit, desulfurization unit by existing traditional sulfurization process facilities, rich solution storage reaction unit optimization forms an overall structure design after desulfurization, and setting is provided with corresponding coil tube type Aftercooling device in 4 layers of packing layer support of desulfurization unit, and the upper position of desulfurization unit and medium position are provided with two-layer spray structure, make desulfuration efficiency obtain good raising, the hydrogen sulfide content after desulfurization in coke gas is far below below the 20mg/ m3 of prior art, be provided with regeneration at regeneration unit top after, washing tail gas unit comprises two portions: one is meet the new water of recirculated water balance or doctor solution sends into washing tail gas unit inner upper through piping, two be spray new water or doctor solution carry out tail gas desulfurization washing after become washings after again send into washing tail gas unit inner upper by recycle pump and pipeline again, by the new water of high-pressure atomization lance ejection or doctor solution, or jet washing liquid carries out dual tail gas desulfurization washing, circular flow like this achieves the tower desulfurization regeneration work of one of coke gas, solve the secondary pollution problem that the tail gas of sweetening effectiveness of the prior art not thoroughly and after regeneration directly discharges from tower top, and in the urgent need to adopting efficient desulfurization regeneration plant issue.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is thionizer and the regenerator column assembly structure schematic diagram of traditional sulfur removal technology.
In figure: 1-sulfur removing pregnant solution exports, 2-gas entry, 3-gas flow distribution device, 4-gas-liquid distributor, 5-filler support, 6-desulfurization lean solution lower inlet and spray structure, 7-filler, nozzle sluicing pipe under 8-, 9-desulfurization lean solution upper inlet and spray structure, 10-upper spray nozzle and flutter mist sluicing pipe, 11-screen, 12-regulator of level, 13-desulfurization lean solution exports, 14-froth breaking pipe, 15-detergent circulator, 16-washings outlet A, 17-tower top rich solution house steward, 18-regeneration tail gas, 19-washings baffle plate, washing tail gas unit after 20-regeneration, the new water of 21-or doctor solution, the new water of 22-or doctor solution shower nozzle, 23-washings shower nozzle, 24-oxygen enrichment house steward, 25-variable valve, 26-oxygen enrichment, 27-sluicing pipe entrance, 28-oxidation regeneration injector, 29-overflow port 29, 30-sulphur foam outlet, 31-sulphur foam regeneration tank, 32-washings outlet B, 33-sluicing pipe, 34-upper spray nozzle and flutter mist sluicing pipe entrance, 35-gas exit, 36-flutters mist device, 37-guide wire, 38-regeneration unit, nozzle sluicing pipe under 39-, 40-desulfurization unit, 41-water cooler entrance, 42-cooler outlet, 43-tower base plate, rich solution storage reaction unit after 44-desulfurization, the fluid-tight of 45-ring-type, 46-disappears foam catalyzer shower nozzle, 47--swirl injection pipe, 48 rich solution storage reaction grooves, 49-rich solution recycle pump, 50-liquid seal trough, 51-thionizer, 52-regenerator column regeneration tail gas diffusion mouth, 53-regenerator column, 54-compressed air station injector, 55-compressed air inlet, 56-regenerator column sulfur removing pregnant solution entrance, 57-reactive tank.
Embodiment
Below in conjunction with Figure of description, the present invention is described in detail, but it should be noted that enforcement of the present invention is not limited to following embodiment.
As shown in Figure 1, there is the coke gas desulfurization regeneration integrated tower of Multi-layer sprinkling structure, the structure of this tower adopts vertical one tower structure, be followed successively by the rear washing tail gas unit 20 of regeneration from top to bottom, regeneration unit 38, desulfurization unit 40, rich solution storage reaction unit 44 after desulfurization, its interconnected relationship is that tower internal structure is by rich solution storage reaction unit 44 and desulfurization unit 40 after inner tower base plate segmentation desulfurization, by inner elliptical shape end socket segmentation desulfurization unit 40 and regeneration unit 38, external structure is provided with bottom the rear washing tail gas unit 20 of regeneration at regeneration unit 38 top.
Have enter gas entry 2 in the desulfurization regeneration process of the coke gas desulfurization regeneration integrated tower of Multi-layer sprinkling structure gas temperature should by remain on 25-35Co and enter regeneration unit 38 desulfurization after rich solution temperature should control at 35-40Co.Otherwise when rich solution temperature is higher after desulfurization, will increase the ammonia dividing potential drop on liquid level, desulfuration efficiency will decline with the reduction of ammonia content in doctor solution, but too low the carrying out also being unfavorable for regenerative response of the temperature of doctor solution.Therefore, the gas temperature of gas entry 2 remain on 25-35Co and enter regeneration unit 38 desulfurization after rich solution temperature control at 35-40Co.
After regeneration, washing tail gas unit 20 exports A16 by washings, washings exports B32, detergent circulator 15, new water or doctor solution shower nozzle 22, washings shower nozzle 23, washings baffle plate 19, regeneration tail gas 18 form.
New water or doctor solution shower nozzle 22, washings shower nozzle 23 sets gradually the inner upper of washing tail gas unit 20 after regeneration, after regeneration, the bottom outside of washing tail gas unit 20 is respectively arranged with washings outlet A16, washings outlet B32, detergent circulator 15 is arranged on separately the top of regeneration unit 38, and export A16 with washings respectively, be connected with washings shower nozzle 23 with through piping, regeneration tail gas 18 is provided with washings baffle plate 19 above ingress, washings baffle plate 19 can play the function of gas-liquid distributor, also the shunting action in regeneration tail gas 18 rising can be played.
After regeneration, the flow process of washing tail gas unit 20 is such:
After regeneration tail gas 18 enters into regeneration after washing tail gas unit 20, with send into through piping tail gas regenerate after washing tail gas unit 20 inner upper, met by meeting of spraying of new water or the doctor solution shower nozzle 22 new water that recirculated water balances or doctor solution 21 adverse current, ammonia in regeneration tail gas 18 or the sulphur foam carried secretly, by new water or doctor solution 21 washing absorption, after absorbing ammonia or the sulphur foam carried secretly, new water or doctor solution 21 fall after becoming washings, after the shunting of washings baffle plate 19, drop on tail gas regeneration in dropping process after in washing tail gas unit 20 lower annular groove; Part washings through washings export A16, by detergent circulator 15 through piping again send into tail gas regenerate after washing tail gas unit 20 inner upper, sprayed by washings shower nozzle 23 after, again circulation cleaning is carried out to regeneration tail gas 18, another part washings also can be passed through washings outlet B32, the sluicing pipe entrance 27 of being delivered to regeneration unit 38 top by pipeline enters regeneration unit 38 and makes full use of further.
Regeneration unit 38 exports 13 by screen 11, regulator of level 12, desulfurization lean solution, froth breaking pipe 14, tower top rich solution house steward 17, new water or doctor solution 21, oxygen enrichment house steward 24, variable valve 25, oxygen rich gas 26, sluicing pipe entrance 27, oxidation regeneration injector 28, overflow port 29, sulphur foam outlet 30, sulphur foam regeneration tank 31, sluicing pipe 33, injector guide wire 37 form.
The flotation unit of the sulphur foam after regeneration unit 38 mainly regenerates, its top expanded section is the sulphur foam regeneration tank 31 of annular, and be arranged on the inner upper of regeneration unit 38, and be communicated with the lower inside of the regeneration unit 38 as solution tank, connectivity part is provided with overflow port 29, screen 11 is arranged on middle part as regeneration unit 38 inside of solution tank and lower portion, screen 11 has makes doctor solution and pressurized air, or make the mixed gas of doctor solution and oxygen rich gas 26 and regeneration tail gas 18 equally distributed function on the cross section face of regeneration unit 38, the sluicing pipe 33 be connected with sluicing pipe entrance 27 is arranged on above sulphur foam regeneration tank 31, regeneration unit 38 top is provided with froth breaking pipe 14 and passes in regeneration unit 38 and prevent foam too high, regeneration unit 38 outside is provided with regulator of level 12 and is communicated with regeneration unit 38 by gas-liquid equilibrium pipe, regulate regeneration unit 38 liquid level, promote that gas-liquid is separated further, the washings of washing tail gas unit 20 after regeneration, or the new water newly covered or doctor solution 21 enter regeneration unit 38 by sluicing pipe entrance 27 and the sluicing pipe 33 be connected to carry out sulphur foam regeneration tank 31 and cleans.
Regeneration unit 38 top is provided with a set of oxidation regeneration injector 28, is connected with tower top rich solution house steward 17, oxygen enrichment house steward 24 respectively, oxygen enrichment house steward 24 is connected with the variable valve 25 on pipeline, the ratio of mixture of the adjustable oxygen rich gas 26 of variable valve 25 and regeneration tail gas 18, to make full use of regeneration tail gas 18 and remaining oxygen carries out the bubbling flotation of the suspension sulphur in doctor solution and the oxidation regeneration of doctor solution, the sulphur foam of generation sends into subsequent processing from sulphur foam outlet 30.
After rich solution is pumped to tower top rich solution house steward 17 by rich solution recycle pump 49 after desulfurization, deliver to oxidation regeneration injector 28 through piping, contacted with air by oxidation regeneration injector 28 or contact with the mixed gas of regeneration tail gas 18 with oxygen rich gas 26, then sprayed by injector guide wire 37 and carry out oxidation regeneration in regeneration unit 38, injector guide wire 37 one end is connected with oxidation regeneration injector 28, and the other end extends downward regeneration unit 38 inner bottom part.
Sulphur foam outlet 30 is arranged on the bottom of sulphur foam regeneration tank 31, desulfurization lean solution outlet 13 after regeneration is arranged on outside in the middle part of regeneration unit 38, the outlet of regeneration tail gas 18 is arranged on regeneration unit 38 crown center position, that is to say rear washing tail gas unit 20 entry position of regeneration.
The flow process of regeneration unit 38 is such:
After desulfurization rich solution by rich solution recycle pump 49 after line pump to tower top rich solution house steward 17, oxidation regeneration injector 28 is delivered to through piping, negative pressure is formed by inner to contact with air of oxidation regeneration injector 28, the mixed gas of oxygen rich gas 26 and regeneration tail gas 18 is introduced oxidation regeneration injector 28 inside, then sprayed by injector guide wire 37 and carry out oxidation regeneration with bottom solution in regeneration unit 38, in doctor solution, sulphur foam bubbling rises, float on top expanded section, the sulphur foam formed overflows gravity flow through overflow port 29 and enters sulphur foam regeneration tank 31, heating steam coil pipe is provided with in groove, sulphur foam hot defecation in groove is separated, clear liquid after separation, namely the desulfurization lean solution after regeneration, export 13 by desulfurization lean solution and be sent to desulfurization unit 40 through pipeline, sulphur foam is from sulphur foam outlet 30, subsequent processing is sent into through foam pump.
Desulfurization unit 40 by gas entry 2, gas flow distribution device 3, gas-liquid distributor 4, filler support 5, desulfurization lean solution lower inlet and spray structure 6, filler 7, lower nozzle sluicing pipe 8, desulfurization lean solution upper inlet and spray structure 9, upper spray nozzle and flutter mist sluicing pipe 10, upper spray nozzle and flutter mist sluicing pipe entrance 34, gas exit 35, flutter mist device 36, lower nozzle sluicing pipe 39, water cooler entrance 41, cooler outlet 42, tower base plate 43 form.
Desulfurization unit 40 sets gradually as tower base plate 43 from bottom to top, gas entry 2, gas flow distribution device 3, gas-liquid distributor 4, filler support 5, cooler outlet 42, water cooler entrance 41, filler 7, gas-liquid distributor 4, filler support 5, cooler outlet 42, water cooler entrance 41, filler 7, desulfurization lean solution lower inlet and spray structure 6, lower nozzle sluicing pipe 8, lower nozzle sluicing pipe entrance 39, gas-liquid distributor 4, filler support 5, cooler outlet 42, water cooler entrance 41, filler 7, gas-liquid distributor 4, filler support 5, cooler outlet 42, water cooler entrance 41, filler 7, desulfurization lean solution upper inlet and spray structure 9, upper spray nozzle and flutter mist sluicing pipe 10, flutter mist device 36, gas exit 35, upper spray nozzle and flutter mist sluicing pipe entrance 34.
Desulfurization lean solution lower inlet and spray structure 6 are the spray structures be arranged in the middle part of desulfurization unit, desulfurization lean solution upper inlet and spray structure 9 are the spray structures being arranged on desulfurization unit top, spray structure is by desulfurization lean solution, lower inlet and the high-pressure atomization spray gun in different radii multilayer annular configuration form, each nozzle in desulfurization lean solution upper inlet and spray structure 9 and desulfurization lean solution lower inlet and spray structure 6 is upper, lower space is staggeredly arranged, and ensure that the overlapping fraction of coverage of desulfurization lean solution at least reaches 170%-250%, namely the area that under nozzle tip, the spray cone of 0.9m covers is multiplied by the nozzle number of every layer, the area of the desulfurization regeneration tower cross section that can cover 170%-250% should be equaled, and ensure that the spray area of each nozzle has identical spray flux density, to avoid spraying dead angle, for ensureing suitable specific liquid rate and liquid-gas ratio, spray gun is in falling pagoda shape, nozzle is that average spray particle size is about 100 μm, thus better doctor solution is atomized small droplets, the coal gas making itself and adverse current increase fully contacts and carries out heat and mass transfer better, and the spray particle size of general desulfurization nozzle is about 1000-5000 μm, the specific surface area of mist unit spray liquid is more than 400 times of the latter, the top of desulfurization lean solution upper inlet and spray structure 9 and flutter and to be provided with shared upper spray nozzle on rear side of mist device 36 and to flutter mist sluicing pipe 10 for desulfurization lean solution upper inlet and spray structure 9 and the cleaning of flutterring mist device 36, the top of desulfurization lean solution lower inlet and spray structure 6 is provided with lower nozzle sluicing pipe 8 for desulfurization lean solution lower inlet and spray structure 6.
Desulfurization unit 40 lower outside is provided with gas entry 2, the arranged outside of top opposite side has gas exit 35, inner filler 7 is set to 4 layers usually, its objective is gas, the liquid two-phase skewness in packing layer of avoiding wall stream effect to cause, causes mass transfer assimilated efficiency is declined.Arrange in 4 layers of packing layer support and corresponding coil tube type circulation Aftercooling device is installed, cooling fluid is by water cooler entrance 41, cooler outlet 42 cools for the recycle heat of desulfurization exothermic process, utilize gas flow distribution device 3 to realize coal gas to be uniformly distributed in whole desulfurization unit 40, carry out adverse current by 4 layers of filler 7 layers and the gas-liquid distributor 4 again with distributed function and the spray from desulfurization lean solution upper inlet and spray structure 9 and desulfurization lean solution lower inlet and spray structure 6 to mix and contact, after hydrogen sulfide in abundant absorption coal gas, doctor solution is turned into rich solution after desulfurization, rich solution storage reaction unit 44 after back taper circular hole inflow desulfurization through tower base plate 43 middle part, coal gas order up through 4 layers of filler 7 layers and there is distributed function again the Multistage desulfuration of gas-liquid distributor 4 after, subsequent processing is sent into by gas exit 35 after flutterring the water smoke that mist device 36 removes in coal gas.
Gas-liquid distributor 4 is to ensure that good gas-liquid distributes and avoids the wall stream effect of desulfurization unit 40 packing tower, liquid under the filler stream of upper strata is through gas-liquid distributor 4, after redistribution, spray is on lower floor's filler, namely the bad Distribution Phenomena of liquid is overcome, ensure that there is less gas resistance simultaneously, namely ensure coal gas and the good mass transfer effect of doctor solution; Filler 7 is selected the full porcelain filling with enough packing specific areas or light porcelain packing, is being ensured, outside good liquid initial distribution, to require that packed height is generally no more than 6M.And the effect of filler be cause gas, liquid two-phase fully contact thus realize alternate heat, matter transmit primary member.Desulfurization lean solution is distributed on packing layer after being sprayed by spray structure, flows down along filling surface by action of gravity, and coke gas then passes the gap of filler under pressure difference promotes, and flows to the tower top the other end by tower bottom one end.Gas, liquid contact on the wetted surface of filler, and the phase interface of the alternate mass transfer absorption process of gas, liquid two normally between the liquids and gases of filling surface carries out.
The flow process of desulfurization unit 40 is such:
Coke gas enters desulfurization unit 40 by gas entry 2, utilize gas flow distribution device 3 to realize coal gas to be uniformly distributed in whole desulfurization unit 40, by 2 layers of filler 7 layers and the gas-liquid distributor 4 again with distributed function, the doctor solution of the atomization sprayed with desulfurization lean solution lower inlet and spray structure 6 carries out first time and conducts heat to mix to contact with the adverse current of mass transfer and wash, under the effect of catalyzer, the hydrogen sulfide etc. in coal gas is absorbed in doctor solution, coke gas is up again by 2 layers of filler 7 layers and the gas-liquid distributor 4 again with distributed function, carry out second time with the doctor solution of the atomization sprayed from desulfurization lean solution upper inlet and spray structure 9 to conduct heat to mix to contact with the adverse current of mass transfer and wash, under the effect of catalyzer, continue the hydrogen sulfide etc. in coal gas to be absorbed in doctor solution, make desulfurization more thorough, the doctor solution back taper circular hole be turned into through 43 middle parts at the bottom of tower after rich solution after desulfurization flows into rich solution storage reaction unit 44 after desulfurization, coal gas order up through 4 layers of filler 7 layers and there is distributed function again the Multistage desulfuration of gas-liquid distributor 4 after, subsequent processing is sent into by gas exit 35 after flutterring the water smoke that mist device 36 removes in coal gas.
After desulfurization, rich solution storage reaction unit 44 is made up of sulfur removing pregnant solution outlet 1, ring-type fluid-tight 45, the foam catalyzer shower nozzle 46 that disappears, swirl injection pipe 47, rich solution storage reaction groove 48, rich solution recycle pump 49.
After desulfurization, rich solution storage reaction unit 44 is based on utilizing the feature that desulfurization regeneration tower diameter is large, the rich solution storage reaction groove with reactive tank function designed by skirt part at the bottom of tower, its interconnected relationship the tower base plate 43 of desulfurization unit 40 and desulfurization regeneration tower sole plate is coupled together by ring-type fluid-tight 45, and isolate desulfurization unit 40, coal gas is avoided to enter rich solution storage reaction unit 44, rich solution storage reaction unit 44 outer upper is provided with the foam catalyzer shower nozzle 46 that disappears, outer lower portion is provided with swirl injection pipe 47, the foam catalyzer shower nozzle 46 that disappears will promote that the catalyst auto-continued addition of chemical absorption reaction is on a small quantity in rich solution after desulfurization, and there is the effect eliminating foam simultaneously, swirl injection pipe 47 have the dilution of eddy flow mixing and shearing make its desulfurization after rich solution family dependant aquation be convenient to the pumping of rich solution recycle pump 49.
After desulfurization, the flow process of rich solution storage reaction unit 44 is such:
After desulfurization in desulfurization unit 40 after desulfurization, rich solution is after the back taper circular hole of 43 middle parts at the bottom of tower, by ring-type fluid-tight 45 rich solution storage reaction unit 44 after flowing into desulfurization, the foam catalyzer shower nozzle 46 that disappears will promote that the catalyzer of chemical absorption reaction to join after desulfurization in rich solution, and then with rich solution recycle pump 49 by rich solution solution after the desulfurization in the rich solution storage reaction groove 48 at the bottom of tower, under the power-assisted of swirl injection pipe 47, being pumped into after in the rich solution house steward 17 being placed in tower top delivers in each self-priming oxidation regeneration injector 28 again, circular flow like this achieves the tower desulfurization regeneration work of one of coke gas.
The implementation flow process with the coke gas desulfurization regeneration integrated tower of Multi-layer sprinkling structure is such:
As illustrated by the arrows in fig. 1, coke gas enters desulfurization unit 40 by gas entry 2, utilize gas flow distribution device 3 to realize coal gas to be uniformly distributed in whole desulfurization unit 40, by 2 layers of filler 7 layers and the gas-liquid distributor 4 again with distributed function, the doctor solution of the atomization sprayed with desulfurization lean solution lower inlet and spray structure 6 carries out first time and conducts heat to mix to contact with the adverse current of mass transfer and wash, under the effect of catalyzer, the hydrogen sulfide etc. in coal gas is absorbed in doctor solution, coke gas continues up again by 2 layers of filler 7 layers and the gas-liquid distributor 4 again with distributed function, carry out second time with the doctor solution of the atomization sprayed from desulfurization lean solution upper inlet and spray structure 9 to conduct heat to mix to contact with the adverse current of mass transfer and wash, under the effect of catalyzer, continue the hydrogen sulfide etc. in coal gas to be absorbed in doctor solution, make desulfurization more thorough, the doctor solution back taper circular hole be turned into through 43 middle parts at the bottom of tower after rich solution after desulfurization flows into rich solution storage reaction unit 44 after desulfurization, coal gas order up through 4 layers of filler 7 layers and there is distributed function again the Multistage desulfuration of gas-liquid distributor 4 after, subsequent processing is sent into by gas exit 35 after flutterring the water smoke that mist device 36 removes in coal gas.After desulfurization in desulfurization unit 40 after desulfurization, rich solution is after the back taper circular hole of 43 middle parts at the bottom of tower, by ring-type fluid-tight 45 rich solution storage reaction unit 44 after flowing into desulfurization, the foam catalyzer shower nozzle 46 that disappears will promote that the catalyzer of chemical absorption reaction to join after desulfurization in rich solution, and then with rich solution recycle pump 49 by rich solution solution after the desulfurization in the rich solution storage reaction groove 48 at the bottom of tower, under the power-assisted of swirl injection pipe 47, being pumped into after in the rich solution house steward 17 being placed in tower top delivers in each self-priming oxidation regeneration injector 28 again, negative pressure is formed by inner to contact with air of oxidation regeneration injector 28, the mixed gas of oxygen rich gas 26 and regeneration tail gas 18 is introduced oxidation regeneration injector 28 inside, then sprayed by injector guide wire 37 and carry out oxidation regeneration with bottom solution in regeneration unit 38, in doctor solution, sulphur foam bubbling rises, float on top expanded section, the sulphur foam formed overflows gravity flow through overflow port 29 and enters sulphur foam regeneration tank 31, heating steam coil pipe is provided with in groove, sulphur foam hot defecation in groove is separated, clear liquid after separation, namely the desulfurization lean solution after regeneration, export 13 by desulfurization lean solution and be sent to desulfurization unit 40 through pipeline, and sulphur foam is from sulphur foam outlet 30, subsequent processing is sent into through foam pump.After regeneration tail gas 18 enters into regeneration after washing tail gas unit 20, with send into through piping tail gas regenerate after washing tail gas unit 20 inner upper, met by meeting of spraying of new water or the doctor solution shower nozzle 22 new water that recirculated water balances or doctor solution 21 adverse current, ammonia in regeneration tail gas 18 or the sulphur foam carried secretly, by new water or doctor solution 21 washing absorption, after absorbing ammonia or the sulphur foam carried secretly, new water or doctor solution 21 fall after becoming washings, after the shunting of washings baffle plate 19, drop on tail gas regeneration in dropping process after in washing tail gas unit 20 lower annular groove; A part washings through washings export A16, by detergent circulator 15 through piping again send into tail gas regenerate after washing tail gas unit 20 inner upper, sprayed by washings shower nozzle 23 after, again circulation cleaning is carried out to regeneration tail gas 18, another part washings also can be passed through washings outlet B32, the sluicing pipe entrance 27 of being delivered to regeneration unit 38 top by pipeline enters regeneration unit 38 and makes full use of further, and circular flow like this achieves the tower desulfurization regeneration work of one of coke gas.
Claims (6)
1. there is the coke gas desulfurization regeneration integrated tower of Multi-layer sprinkling structure, it is characterized in that, this tower structure adopts vertical one tower structure, set gradually as regenerating rear washing tail gas unit (20) from top to bottom, regeneration unit (38), desulfurization unit (40), after desulfurization, rich solution storage reaction unit (44) optimization design becomes an entirety, its annexation is that internal structure is by rich solution storage reaction unit (44) and desulfurization unit (40) after inner tower base plate (43) segmentation desulfurization, by inner elliptical shape end socket segmentation desulfurization unit (40) and regeneration unit (38), external structure is provided with the rear washing tail gas unit (20) of regeneration.
2. the coke gas desulfurization regeneration integrated tower with Multi-layer sprinkling structure according to claim 1, it is characterized in that: be connected with the rear washing tail gas unit (20) of regeneration on regeneration unit (38) top, after regenerating, the discharge outlet of tail gas is the entrance of the rear washing tail gas unit (20) of regeneration, and the rear tail gas of regeneration enters washing tail gas unit (20) after regeneration through discharge outlet and carries out washing tail gas desulfurization.
3. the coke gas desulfurization regeneration integrated tower with Multi-layer sprinkling structure according to claim 1, it is characterized in that: desulfurization unit (40) upper position is provided with desulfurization lean solution upper inlet and spray structure (9) and medium position and is provided with desulfurization lean solution lower inlet and the two-layer spray structure of spray structure (6), and upper and lower two-layer spray structure all can be arranged to the form of one or more layers spray structure.
4. the coke gas desulfurization regeneration integrated tower with Multi-layer sprinkling structure according to claim 1, it is characterized in that: arrange in the inner filler support (5) for supporting filler (7) of desulfurization unit (40) and be provided with corresponding coil tube type circulation Aftercooling device, the recycle heat for exothermic process in sweetening process cools.
5. the coke gas desulfurization regeneration integrated tower with Multi-layer sprinkling structure according to claim 2, is characterized in that: after regeneration, the washing tail gas process of washing tail gas unit (20) comprises two portions: one is meet the new water of whole desulfurizing technology system recirculated water balance or doctor solution (21) is sent into washing tail gas unit (20) inner upper after regeneration through piping, carried out tail gas desulfurization washing by the new water of high-pressure atomization lance ejection or doctor solution (21); Two is become washings after the new water that sprays or doctor solution (21) carry out tail gas desulfurization washing, washing tail gas unit (20) inner upper after then washings sends into regeneration again by detergent circulator (15) and pipeline, to be carried out again tail gas desulfurization washing by high-pressure atomization lance ejection washings.
6. the coke gas desulfurization regeneration integrated tower with Multi-layer sprinkling structure according to claim 3, is characterized in that: each nozzle in the desulfurization lean solution upper inlet of desulfurization unit (40) and spray structure (9) and desulfurization lean solution lower inlet and spray structure (6) is staggeredly arranged in upper and lower space.
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Application publication date: 20150708 |