CN104671221A - Method and device for preparing sulphuric acid by taking discharged sulfur dioxide as raw material - Google Patents
Method and device for preparing sulphuric acid by taking discharged sulfur dioxide as raw material Download PDFInfo
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- CN104671221A CN104671221A CN201510056297.8A CN201510056297A CN104671221A CN 104671221 A CN104671221 A CN 104671221A CN 201510056297 A CN201510056297 A CN 201510056297A CN 104671221 A CN104671221 A CN 104671221A
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- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B17/00—Sulfur; Compounds thereof
- C01B17/69—Sulfur trioxide; Sulfuric acid
- C01B17/74—Preparation
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B17/00—Sulfur; Compounds thereof
- C01B17/69—Sulfur trioxide; Sulfuric acid
- C01B17/88—Concentration of sulfuric acid
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Abstract
The invention discloses a method and device for preparing sulphuric acid by taking discharged sulfur dioxide as a raw material. According to the method, discharged sulfur-containing smoke goes into a hydrogen peroxide desulfurizer, generated dilute sulphuric acid goes into a multiple-effect concentration device to prepare concentrated sulfuric acid, and the concentrated sulfuric acid with set concentration can be directly obtained. By utilizing the device, a byproduct of concentrated sulfuric acid can be realized by utilizing hydrogen peroxide method desulfuration, the problem that dilute sulphuric acid in smoke desulfuration industries can not be reused and externally sold is solved, the use range of hydrogen peroxide method desulfuration is broadened, and sulphur resource is completely utilized.
Description
Technical field
The present invention relates to industry and the environmental technology fields such as sulfuric acid manufacture, iron and steel, metallurgy, nonferrous smelting, chemical industry, specifically a kind of peroxide passivation tail gas desulfurization produce method and the device of high-concentration sulfuric acid.
Background technology
Sulfuric acid is a kind of important industrial raw material, and China is the country that our times sulphuric acid output is the highest, and according to 2013 annual datas, annual production reaches 8,500 ten thousand tons.The industrial making method mainly contact process of sulfuric acid, sulfurous gas is generated through oxidizing fire by sulphur raw material, sulfurous gas contacts with oxygen in the presence of a catalyst and generates sulphur trioxide, and the sulphur trioxide vitriol oil of 98.3% absorbs, then obtains business acid with water or dilute sulphuric acid dilution.
Sulphur raw material mainly contains sulphur, sulfurous iron ore, flue gas during smelting etc., and in the majority with sulphur abroad, China is then based on sulfurous iron ore.But the Sulphur ressource of China is not enough, and the Sulphur ressource needed for gas washing in SA production closely partly needs from external import.On the other hand, China has again 20,000,000 tons of sulfurous gas to be nearly discharged in air with the form of industrial gaseous waste every year, forms atmospheric polluting material, works the mischief again while the wasting of resources to environment.The existing principle of flue gas during smelting or useless sulfurous gas relieving haperacidity that utilizes remains contact process, in the process of catalytic oxidation, still can produce a large amount of sulphur-containing exhaust gas, produce cyclic polluting, the sulphur-containing exhaust gas of in fact existing acid plant also has very major part to derive from the waste gas of contact procedure.
Sulfurous gas is the main pollution factor in atmospheric polluting material, and the discharge of sulfurous gas can cause acid rain to cause acidifying and corrosion to water body, farm crop, environment, buildings etc., causes huge financial loss.The high speed development of the industries such as China's iron and steel, metallurgy, nonferrous smelting, chemical industry, bring serious sulfur dioxide pollution, carrying capacity of environment is difficult to bear, and the emission standard of every profession and trade tightens step by step in recent years, brings restriction to the development of every profession and trade.
Current sulfur-containing tail gas process mainly contains ammonia process, amine process, sodium alkali, activated coke method, zinc oxide method, peroxide passivation etc.Wherein peroxide passivation developed one of wet desulphurization method in recent years, has that desulfuration efficiency is high, flow process is short, invest the advantages such as relatively low.Wherein relate to peroxide passivation and remove sulfur dioxide in flue gas and the patent of reclaim(ed) sulfuric acid has, CN100463847C prepares the method for sulfuric acid with stack gas, CN100354028C is by the method with hydroperoxidation scrubbing CO_2 from waste gas, and CN202070285U mono-kind removes sulfuric acid industry sulfur dioxide in tail gas, reclaim(ed) sulfuric acid device etc.Above patent is all reacted hydrogen peroxide (hydrogen peroxide) and sulfurous gas, the method mechanism and the device that produce sulfuric acid are described, but because of by-product in actual application is the dilute sulphuric acid of 20-40%, the industry of industrial sulphuric acid production equipment is not had at some, this part dilute sulphuric acid cannot get back to system for preparing sulfuric acid, or dilute sulphuric acid concentration is low sells difficulty directly outward, causes its comprehensive utilization to be restricted, affect the scope of application of the method.
Summary of the invention
The object of the invention is to overcome deficiency and potential problems that above-mentioned existing peroxide passivation desulfurization exists when some sector application, a kind of fume desulphurization method and device of stable, by-product high-concentration sulfuric acid are provided, widen the scope of application of peroxide passivation flue gas desulfurization, solve the problem that in current desulfurization technology, by product using value is not high, make full use of Sulphur ressource.
Specifically, the present invention solves above-described problem by the following technical solutions:
A kind of to discharge the device of sulfurous gas for waste sulfuric acid, comprise hydrogen peroxide devulcanizer and thin sulfuric acid thickener, wherein thin sulfuric acid thickener comprises preheater, flashing chamber and flash heater, it is characterized in that, flashing chamber and flash heater have at least a set of, one effect flash heater of terminal is by the heat supply of terminal saturation steam, and two effect flash heaters imitate the flash steam of flashing chamber as heat supply by one, by that analogy, the flash steam of last end effect flashing chamber is as the thermal source of preheater, the dilute sulphuric acid export pipeline of hydrogen peroxide devulcanizer is connected with dilute sulfuric acid preheater, and an effect flashing chamber has vitriol oil outlet, this outlet is connected to export the vitriol oil with concentrated acid water cooler.
Preferably, described device also comprises vacuum cooler-condenser, vacuum interchanger, water cooler, liquid seal trough and return pump, the drain side access vacuum cooler-condenser of wherein respectively imitating flash heater is condensed into liquid, and form system vacuum, the not solidifying gas of vacuum cooler-condenser, discharge is attracted through vacuum pump after the cooling of vacuum interchanger, liquid seal trough is set and keeps the vacuum seal of vacuum interchanger, realize whole system vacuum state, the liquid that in vacuum cooler-condenser, condensation produces enters liquid seal trough after supercooler cooling, recovery is collected by returning pump, the supplementary water of balance as peroxide passivation desulfurizer, thus three-waste free discharge.
Preferably, dilute sulphuric acid export pipeline was also provided with reducer before entering dilute sulfuric acid preheater, was provided with reductive agent in reducer, and dilute sulphuric acid first contacted to carry out reduction treatment to this dilute sulphuric acid product with reductive agent before entering dilute sulfuric acid preheater.
The invention also discloses a kind of to discharge the method for sulfurous gas for waste sulfuric acid, it is characterized in that, said method comprising the steps of: 1) make sulfur-containing smoke gas enter hydrogen peroxide thionizer and carry out desulfurization, generate dilute sulphuric acid; 2) make the dilute sulphuric acid of generation enter sulphuric acid concentration device, generate the vitriol oil, described sulphuric acid concentration device comprises dilute sulfuric acid preheater and the sulfuric acid of at least one effect flash distillation work in order to produce different concns.
The concentration of the vitriol oil produced can regulate within the scope of 50-95%, preferably, produce the vitriol oil concentration be 60-95%, be more preferably 93-95%.
Preferably, in step 2) make the dilute sulphuric acid of generation enter sulphuric acid concentration device carry out concentrated before also comprise the step that the dilute sulphuric acid of generation is contacted with reductive agent.
Beneficial effect: utilize method and apparatus of the present invention, greatly can reduce the discharge of sulphur, utilize existing Sulphur ressource fully, realize economic benefit and social benefit.
Accompanying drawing explanation
Fig. 1 is peroxide passivation tail gas desulfurization of the present invention and produces method and the apparatus structure schematic diagram of high-concentration sulfuric acid.
In the drawings: 1 dioxygen tank, 2 dioxygen water pumps, 3 stabilizers, 4 hydrogen peroxide devulcanizers, 5 cyclic absorption pumps, 6 reducers, 7 preheaters, 8 triple effect flashing chambers, 9 triple effect well heaters, 10 2 effect flashing chambers, 11 2 effect well heaters, 12 1 effect flashing chambers, 13 1 effect well heaters, 14 triple effect cycle pumps, 15 2 effect recycle pumps, 16 1 effect recycle pumps, 17 concentrated acid water coolers, 18 vacuum cooler-condensers, 19 vacuum interchanger, 20 water coolers, 21 liquid seal troughs, 22 return pump, 23 vacuum pumps, 24 condensation pumps.
Embodiment
The invention discloses a kind of to discharge the method and apparatus of sulfurous gas for waste sulfuric acid, the method comprises makes the sulfur-containing smoke gas of discharge enter peroxide passivation desulfurizer, the dilute sulphuric acid produced enters Multi-effect concentration device to produce the vitriol oil, directly can obtain the vitriol oil of setting concentration.Device of the present invention can utilize peroxide passivation desulfurization to realize the by-product vitriol oil, and solving some flue gas desulfurization industry dilute sulphuric acid can not reuse and the problem of selling outward, widens the use range of peroxide passivation desulfurization, makes full use of Sulphur ressource.
The technical scheme peroxide passivation of first part of the present invention obtains dilute sulphuric acid byproduct, and second section, on dilute sulphuric acid basis, takes multiple-effect condensation technology, produces the vitriol oil.
Peroxide passivation tail gas desulfurization also produces method and the device of high-concentration sulfuric acid, and described method and device mainly comprise two steps and two parts.First step and first part are peroxide passivation desulfurized step and device, and second step and second section are vitriol oil preparation process and device.
First step and first part, comprise dioxygen tank 1, dioxygen water pump 2, hydrogen peroxide devulcanizer 4 and discharging separating circulating device, hydrogen peroxide devulcanizer has smoke feed mouth, smoke feed mouth connects feeding line, the top of hydrogen peroxide devulcanizer has evacuation port, bottom is circulation groove, and circulation groove is connected to the pipeline of discharging separating circulating device through recycle pump 5.
In a preferred embodiment, a stabilizer 3 is also provided with at circulation groove, stabilizer effect be to be used in tail gas desulfurization device initially drive or start-stop car time, the hydrogen peroxide newly added is contacted and the stabilization of agent of playing stably with stablizer, reaches the stable Undec object of hydrogen peroxide newly added.In one case, stabilizer is a pipeline, and pipeline tapping is at circulation groove, and the pipeline the other end is connected with stablizer source.When needing, stablizer adds in circulation groove by this pipeline tapping by stablizer source, and namely the stablizer added contacts with hydrogen peroxide and reach stable object.In another case, hold the stablizer for preventing decomposing hydrogen dioxide solution in stabilizer, when needing, stabilizer is opened, and stablizer is discharged in circulation groove.Both of these case is all stablizer release, reaches stablizer and contacts with hydrogen peroxide.The stablizer worked in this way can be liquid or solid-state, such as stabiliser solution or particulate state stablizer.
Stablizer can adopt all ingredients that can prevent decomposing hydrogen dioxide solution.In general, hydrogen peroxide is more stable under slightly acidic and neutrallty condition, and activates in the basic conditions, can fast decoupled under heavy metal ion exists.Relate to adopt in the field of hydrogen peroxide application hydrogen peroxide can be stoped uncontrolledly to decompose added reagent be called hydrogen peroxide stabilizer.The type of hydrogen peroxide stabilizer has multiple, such as adsorptive type, chelating type or mixed type etc., and heavy metal ion can be isolated by modes such as absorption and chelatings by they, avoids affecting hydrogen peroxide product.Conventional hydrogen peroxide stabilizer also has the types such as siliceous or not siliceous.Siliceous stabilizer package is containing the such as silicate such as water glass, Magnesium Silicate q-agent stablizer, and they have excellent adsorptive power, have good physical and chemical adsorption characteristic to metal ion, thus reduces the katalysis of metal ion.Not siliceous stabilizer package is containing types such as such as soaps.Also have macromolecule stabilizer, they form large scale structure by forming polymer reticulated structure, have very strong adsorption, and can be obtained by finishing and well adsorb isolation effect.Some conventional small molecule chelators are also conventional hydrogen peroxide stabilizers, they are coordinated with polymer, can obtain good stabilized hydrogen peroxide effect.Chelating type stablizer is generally multivalence organic acid or its salt, such as carboxylate salt, phosphonate etc.
In another embodiment, stablizer adopts the stablizer that is fixed on carrier or stablizer itself to be the solid-state stablizers of polymer, such as water glass and polyacrylamide amine stabiliser.In this case, stablizer is contained in stabilizer, and stabilizer is when needed in opening kenel or be open kenel always, and when making to need, hydrogen peroxide can contact with stablizer, reaches the Undec object of Stabilizing Hydrogen Peroxide.
Hydrogen peroxide stabilizer can be buied from suppliers, such as, purchased from the ST-1/2 stablizer of Jiangsu Cheng Tian Environmental Protection Technology Co., Ltd, also oneself can prepare, such as, adopts EDTA to carry out Stabilizing Hydrogen Peroxide as sequestrant.
Peroxide passivation flue gas desulfurization device comprises the circulation groove of superposed desulfuration absorber and bottom, hydrogen peroxide in dioxygen tank 1 pumps into devulcanizer by dioxygen water pump 2 through pipeline, after smoke contacts, tail gas is discharged by devulcanizer top, and reacted liquid drops in the circulation groove of bottom.Stabilizer 3 is arranged on bottom circulation groove, is buried in absorption liquid, after allocating hydrogen peroxide solution into, plays the object that Stabilizing Hydrogen Peroxide does not decompose in initial driving circulation groove.During driving, by the stablizer in stabilizer and the hydrogen peroxide obtain solution entering devulcanizer first simultaneously or inserted before hydrogen peroxide in circulation groove, play the effect of Stabilizing Hydrogen Peroxide obtain solution.And stablizer is by always along with circulating in devulcanizer of liquid is circulated, and do not need other interpolation, or can add again after operation for some time yet, with stabilizer concentration certain in ensureing to circulate.
Desulfuration absorber can be form conventional in this area, and the apparatus-form such as such as void tower, packing tower, hypergravity machine, can adopt one or more levels desulfurization to absorb according to practical situation.
Preferably no matter adopt which kind of form sweetener, all can arrange the removal device to thing foam in flue gas, what removal device was preferential selects nonmetallic silk screen, filler or its array configuration.
Circulating liquid enters tripping device by cyclic absorption pump 5.Tripping device is tripping device conventional in peroxide passivation desulfurization process, for separating of the sulfuric acid that desulfurization produces.
The discharging pipeline of discharging separating circulating device is divided into two-way, and a road is the circulation line of isolated hydrogen peroxide solution being sent back to devulcanizer, and the hydrogen peroxide liquid that contains after separation proceeds devulcanizer, under by top spray, fully contacts with sulfur-containing smoke gas.Another road is the pipeline transporting isolated dilute sulphuric acid, by pipeline, obtains the dilute sulphuric acid of 20-40%.
The dilute sulphuric acid separated, before discharge, preferably enters reducer and processes.Reducer device is arranged on dilute sulphuric acid pipeline, the reductive agent for decomposing remaining hydrogen peroxide in by-product dilute sulphuric acid is accommodated in reducer device, for playing a role when dilute sulphuric acid is transported by pipeline, to reach the object of decomposing hydrogen peroxide residual in dilute sulphuric acid.If entered in the sulfuric acid of follow-up flow process containing hydrogen peroxide, make first in obtained finished product containing hydrogen peroxide impurity, reduce product quality, oxidation can be formed on the other hand to pipeline along the line and flash distillation plant, thus etching apparatus, cause structure deteriorate, be therefore necessary before dilute sulphuric acid enters subsequent concentration program, the hydrogen peroxide concentration in charging to be down to minimum, even do not exist completely.For holding the container that the reducer of reductive agent is non-metallic material making, inside is filled with the reductive agent material that can decompose remaining hydrogen peroxide in dilute sulphuric acid, is equipped with liquid inlet, liquid exit and gas discharge outlet; Dilute sulphuric acid containing remaining hydrogen peroxide enters from liquid inlet, and be sprayed at above the inner reductive agent loaded, remaining hydrogen peroxide is broken down into water and oxygen is emptying from gas discharge outlet, and liquid is discharged from liquid exit.Decomposing hydrogen dioxide solution is and foregoing stabilization opposite effect, as long as the reagent that therefore can accelerate decomposing hydrogen dioxide solution can be used as reductive agent used herein, preferably through fixing catalyzer, such as metal oxide bed, such as with the Solid Bed that the material comprising manganese dioxide-catalyst is made, described reductive agent can also be buied from businessman, the reductive agent buied can be the reductive agent reaching effect of the present invention with various principle, such as, purchased from the ST-1 reductive agent of Jiangsu Cheng Tian Environmental Protection Technology Co., Ltd.
Second step and second section, vitriol oil preparation method and device, comprise dilute sulfuric acid preheater 7, flasher 8,10,12, flash heater 9,11,13, flash distillation recycle pump 14,15,16, concentrated acid water cooler 17, vacuum cooler-condenser 18, condensation pump 24, vacuum interchanger 19, water cooler 20, liquid seal trough 21, return pump 22, vacuum pump 23 and corresponding pipeline.The dilute sulphuric acid that first step obtains enters flashing chamber after dilute sulfuric acid preheater preheating, flash off portion of water, continuous additional heat under the effect of flash distillation recycle pump and flash heater, flash condition moisture is kept constantly to discharge, an effect, two effects, triple effect or multi-effect flashing steam can be taked as required to connect, to obtain the vitriol oil product of different concns, vitriol oil product stores outer selling after the cooling of concentrated acid water cooler.One effect thermal source of flash heater adopts saturation steam, the flash steam of an effect flashing chamber as the thermal source of two effect flash heaters, the like, the flash steam of last end effect flashing chamber is as the thermal source of dilute sulfuric acid preheater, and multiple-effect evaporation like this, saves heat energy consumption.The drain side access vacuum cooler-condenser of each effect flash heater, under the absorption cooling of condensation pump circulating liquid, is condensed into liquid, and forms system vacuum; The not solidifying gas of vacuum cooler-condenser, after the cooling of vacuum interchanger, attract discharge through vacuum pump, phlegma then enters liquid seal trough, and the discharge mouth of pipe even immerses below liquid seal trough liquid level; Vacuum pump can select the form such as water-ring vacuum pump, jet type vacuum pump.According to vacuum pressure rank, arrange liquid seal trough and keep the vacuum seal of vacuum interchanger, the phlegma dexterously by means of condenser and interchanger realizes fluid-tight, realizes whole system vacuum state.All liquid is used as to supplement water for devulcanizer via returning pump again, realizes the infinite loop of refuse and does not outwards discharge.The liquid that the method and unit flashing produce and vacuum interchanger phlegma are containing acid solution body, are recycled, the supplementary water of the balance as peroxide passivation desulfurizer, three-waste free discharge after collecting.
By-product sulfuric acid of the present invention can as requested, regulate within the scope of 50-95%, for ease of reuse or market sale, and preferred 60-95%, more preferably 93-95%.
In the present invention, to produce the flow process of the vitriol oil as follows for Multi-effect concentration:
The dilute sulphuric acid that peroxide passivation desulfurization produces, adopts the flash distillation gas of triple effect flasher to be preheating to certain temperature as thermal source, then enters flash distillation moisture in triple effect flashing chamber in preheater; Continuous additional heat under the effect of flash distillation recycle pump and flash heater, flash condition moisture is kept constantly to discharge, primary, secondary, tertiary or multi-level flash distillation can be taked as required to connect, to obtain the vitriol oil product of different concns, vitriol oil product stores outer selling after the cooling of concentrated acid water cooler.The terminal thermal source of flash heater adopts fresh saturation steam, the flash steam of end-flash room as the thermal source of previous stage flash heater, the like, multiple-effect evaporation, saves heat energy consumption; The drain side access vacuum cooler-condenser of flash heater at different levels, under the absorption cooling of condensation pump circulating liquid, is condensed into liquid, and forms system vacuum, keep flashing chamber vacuum flashing state at different levels with this; The not solidifying gas of vacuum cooler-condenser, attracts discharge through vacuum pump after the cooling of vacuum interchanger, according to vacuum pressure rank, arranges liquid seal trough and keeps the vacuum seal of vacuum interchanger, realize whole system vacuum state.The liquid that this system and device flash distillation produces, the supplementary water of the balance as peroxide passivation desulfurizer, three-waste free discharge.
By reference to the accompanying drawings embodiments of the present invention are described in detail above, but the invention is not restricted to above-mentioned embodiment, in the ken that art those of ordinary skill possesses, can also make a variety of changes under the prerequisite not departing from present inventive concept.
Claims (6)
1. one kind to discharge the device of sulfurous gas for waste sulfuric acid, comprise hydrogen peroxide devulcanizer and thin sulfuric acid thickener, wherein thin sulfuric acid thickener comprises preheater, flashing chamber and flash heater, it is characterized in that, flashing chamber and flash heater have at least a set of, one effect flash heater of terminal is by the heat supply of terminal saturation steam, and two effect flash heaters imitate the flash steam of flashing chamber as heat supply by one, by that analogy, the flash steam of last end effect flashing chamber is as the thermal source of preheater, the dilute sulphuric acid export pipeline of hydrogen peroxide devulcanizer is connected with dilute sulfuric acid preheater, and an effect flashing chamber has vitriol oil outlet, this outlet is connected to export the vitriol oil with concentrated acid water cooler.
2. as claimed in claim 1 to discharge the device of sulfurous gas for waste sulfuric acid, it is characterized in that, described device also comprises vacuum cooler-condenser, vacuum interchanger, water cooler, liquid seal trough and return pump, the drain side access vacuum cooler-condenser of wherein respectively imitating flash heater is condensed into liquid, and form system vacuum, the not solidifying gas of vacuum cooler-condenser, discharge is attracted through vacuum pump after the cooling of vacuum interchanger, liquid seal trough is set and keeps the vacuum seal of vacuum interchanger, realize whole system vacuum state, the liquid that in vacuum cooler-condenser, condensation produces enters liquid seal trough after supercooler cooling, recovery is collected by returning pump, the supplementary water of balance as peroxide passivation desulfurizer, thus three-waste free discharge.
3. as claimed in claim 1 to discharge the device of sulfurous gas for waste sulfuric acid, it is characterized in that, dilute sulphuric acid export pipeline was also provided with reducer before entering dilute sulfuric acid preheater, be provided with reductive agent in reducer, dilute sulphuric acid first contacted to carry out reduction treatment to this dilute sulphuric acid product with reductive agent before entering dilute sulfuric acid preheater.
4. to discharge the method for sulfurous gas for waste sulfuric acid, it is characterized in that, said method comprising the steps of: 1) make sulfur-containing smoke gas enter hydrogen peroxide thionizer and carry out desulfurization, generate dilute sulphuric acid; 2) make the dilute sulphuric acid of generation enter sulphuric acid concentration device, generate the vitriol oil, described sulphuric acid concentration device comprises dilute sulfuric acid preheater and the sulfuric acid of at least one effect flash distillation work in order to produce different concns.
5. as claimed in claim 4 to discharge the method for sulfurous gas for waste sulfuric acid, it is characterized in that, produce the vitriol oil concentration be 60-95%.
6. as claimed in claim 4 discharge the method for sulfurous gas for waste sulfuric acid, to it is characterized in that, in step 2) dilute sulphuric acid of generation is entered before sulphuric acid concentration device carries out concentrating also comprise the step that the dilute sulphuric acid of generation is contacted with reductive agent.
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| CN201510056297.8A CN104671221B (en) | 2015-02-04 | 2015-02-04 | Method and device for preparing sulphuric acid by taking discharged sulfur dioxide as raw material |
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| CN201510056297.8A CN104671221B (en) | 2015-02-04 | 2015-02-04 | Method and device for preparing sulphuric acid by taking discharged sulfur dioxide as raw material |
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| CN104671221A true CN104671221A (en) | 2015-06-03 |
| CN104671221B CN104671221B (en) | 2017-02-22 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160243494A1 (en) * | 2014-01-02 | 2016-08-25 | Alstom Technology Ltd | Apparatus and method for evaporating waste water and reducing acid gas emissions |
| US9861930B2 (en) | 2014-01-02 | 2018-01-09 | General Electric Technology Gmbh | Apparatus and method for evaporating waste water and reducing acid gas emissions |
| CN111068495A (en) * | 2019-12-09 | 2020-04-28 | 中国恩菲工程技术有限公司 | Treatment method of sulfur-containing tail gas |
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| CN1094013A (en) * | 1993-03-15 | 1994-10-26 | 气体产品与化学公司 | Sulfuric acid purifying and concentration technology |
| CN204474329U (en) * | 2015-02-04 | 2015-07-15 | 南京澄天环境科学研究院有限公司 | A kind of to discharge the device of sulfurous gas for waste sulfuric acid |
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| CN1094013A (en) * | 1993-03-15 | 1994-10-26 | 气体产品与化学公司 | Sulfuric acid purifying and concentration technology |
| CN204474329U (en) * | 2015-02-04 | 2015-07-15 | 南京澄天环境科学研究院有限公司 | A kind of to discharge the device of sulfurous gas for waste sulfuric acid |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20160243494A1 (en) * | 2014-01-02 | 2016-08-25 | Alstom Technology Ltd | Apparatus and method for evaporating waste water and reducing acid gas emissions |
| US9724638B2 (en) * | 2014-01-02 | 2017-08-08 | General Electric Technology Gmbh | Apparatus and method for evaporating waste water and reducing acid gas emissions |
| US9861930B2 (en) | 2014-01-02 | 2018-01-09 | General Electric Technology Gmbh | Apparatus and method for evaporating waste water and reducing acid gas emissions |
| CN111068495A (en) * | 2019-12-09 | 2020-04-28 | 中国恩菲工程技术有限公司 | Treatment method of sulfur-containing tail gas |
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| CN104671221B (en) | 2017-02-22 |
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