CN1194794C - Multifluid alkaline fog generator smoke desulfuring method - Google Patents
Multifluid alkaline fog generator smoke desulfuring method Download PDFInfo
- Publication number
- CN1194794C CN1194794C CN 03116987 CN03116987A CN1194794C CN 1194794 C CN1194794 C CN 1194794C CN 03116987 CN03116987 CN 03116987 CN 03116987 A CN03116987 A CN 03116987A CN 1194794 C CN1194794 C CN 1194794C
- Authority
- CN
- China
- Prior art keywords
- alkali
- generator
- desulfurizing agent
- suspension
- smoke
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Treating Waste Gases (AREA)
Abstract
The present invention relates to a smoke desulfurizing method with multi-fluid alkaline fog generators, which belongs to the field of the environmental protection. The method comprises the following steps that one or a plurality of multi-fluid alkaline fog generators are arranged, and water drops atomized by two-fluid spray nozzles are activated with the granules of a desulfurizing agent at high concentration in a collision mode by adding a small amount of hot smoke or air in the multi-fluid alkaline fog generators; thus, the alkaline fog of a wet desulfurizing agent is prepared in an on-line mode. The prepared alkaline fog of the wet desulfurizing agent is continuously and uniformly mixed in a smoke channel of a boiler or the smoke in a reactor arranged externally, and is quickly desulfurized in the smoke channel or the reactor arranged externally; thus, sulfur dioxide in the smoke is eliminated. The present invention avoids the problems that the spray nozzle is clogged and worn because of complex slurry preparing equipment and atomized slurry, the reactor is bulky, etc. Simultaneously, the present invention improves the collisional activation efficiency of the atomized water drops and the desulfurizing agent, the desulfurization efficiency of the smoke and the utilization ratio of the desulfurizing agent. The present invention is a novel smoke desulfurizing method which has the advantages of simple structure and high efficiency, and does not influence the operation of the combustion equipment and reduces the investment cost and the operation cost greatly.
Description
Technical field
What the present invention relates to is a kind of fume desulphurization method, and particularly a kind of generator of alkali ne suspension semidry method flue gas desulfurization method belongs to field of environment protection.
Background technology
The semidry method flue gas desulfurization method that present pulverized-coal fired boiler, Industrial Boiler or other combustion apparatus discharge sulfur dioxide in flue gas remove mainly contains spray drying FGD process, in-furnace calcium spraying and afterbody humidification activation doctor treatment and circulating fluid bed flue-gas desulfurizing, all adopts calcium-based desulfurizing agent (lime stone, lime, calcium hydroxide etc.) to carry out flue gas desulfurization.Spray drying FGD process has that system is simple, investment is lower, desulfurization product is advantages such as dry powder shape, non-wastewater discharge, but part obviously comes with some shortcomings, mainly contain: (1) is because the solubility of lime in water is low, must make lime milkiness slurries, its serum producing system is complicated and huge; (2) higher to the atomizer quality requirement, often density unevenness and the unequal factor of granularity because of lime slurry causes atomization badness, and can cause the obstruction and the wearing and tearing of atomizer.Be obstruction, the wearing and tearing that prevent atomizer, must adopt the high speed rotary-atomizing nozzle of special material; (3) lime slurry atomizing difficulty, the atomized drop particle diameter is big, desulphurization reaction speed low (with square being inversely proportional to of size droplet diameter), thereby cause absorption tower bulky (the flue gas design time of staying is more than 10 seconds), influence the further reduction and the application in existing power plant improvement project of desulphurization plant cost of investment.In-furnace calcium spraying and afterbody humidification activation flue gas desulfurization technique (LIFAC) are another kind of common semidry method flue gas desulfurization methods, but also have some problems: (1) is under the coal-powder boiler condition, the desulfurizing agent mass ratio of flying dust and adding in the flue gas is generally more than 10～20 times, to its mass ratio of high-ash fire coal even can be higher.A large amount of water droplets are absorbed by flying dust to exist a large amount of flying dusts and desulfurizing agent " to rob water " when adopting the work of water sprinkling for better material moisture activation in activated reactor, and the actual water calcium of desulfurizing agent mol ratio is very low, and the reactive desulfurizing agent activity is not high; (2) all flue gas is by activated reactor, and sorbent particle and water smoke are diluted greatly by flue gas, and its collisional activation efficient is lower, only is 25%～30%.Its result is that activated reactor is bulky equally, and desulfuration efficiency is difficult for improving.Through the retrieval of prior art is looked into newly, still find no bibliographical information so far with generator of alkali ne suspension fume desulphurization method same subject of the present invention.
Summary of the invention
The present invention is directed to deficiency of the prior art and defective, a kind of generator of alkali ne suspension fume desulphurization method has been proposed, make it simple and easy, compact, efficient, can effectively overcome or avoid serum producing system and a series of problems such as atomizer obstruction and wearing and tearing of conventional semi method fume desulphurization method complexity, and can increase substantially the collisional activation efficient of sorbent particle and water droplets and the reactivity and the desulfuration efficiency of desulfurizing agent, reduce the volume of desulfuration absorbing tower greatly.
The present invention is achieved by the following technical solutions, the inventive method is specific as follows: generator of alkali ne suspension is set, by water droplet and sorbent particle collisional activation under higher concentration of two-fluid spray nozzle atomizing, finish the online preparation of wet type desulfurizing agent alkali mist therein; Then, the wet type desulfurizing agent alkali mist of online preparation is mixed in the flue gas of boiler flue with certain time of staying or external reactor continuously equably, finishes the desulfurization rapidly reaction in flue or external reactor, removes sulfur in smoke.
Below the inventive method is further described:
1, one or more generator of alkali ne suspension is set, adopt the small amount of thermal flue gas or adopt air, enter generator of alkali ne suspension by air distributor, the desulfurizing agent injection that wherein a part of air quantity carries from feed bin enters generator of alkali ne suspension, make water droplet and sorbent particle collisional activation under higher concentration of two-fluid spray nozzle atomizing in it, the online wet type desulfurizing agent alkali mist of making.
2, generator of alkali ne suspension is connected on smoke canal elbow or other proper site, by means of the centrifugal action of the effect of main smoke airflow, smoke canal elbow with and the effect that helps jet mixing flow that is provided with of outlet, quickening wet type desulfurizing agent alkali mist is mixed in the flue gas of boiler flue or external reactor continuously, equably, the existence of sorbent particle surface moisture makes between sulfur dioxide gas and the sorbent particle ionic reaction takes place, and guarantees carrying out fast of the interior desulphurization reaction of follow-up flue.In boiler flue or external reactor, finish the desulfurization rapidly reaction of wet type desulfurizing agent, remove sulfur in smoke.
Adopt two-fluid spray nozzle atomizing clear water, can obtain superfine water droplets particle diameter, the drop particle diameter of two-fluid spray nozzle atomizing can adapt to the requirement of follow-up flue desulfurization rapidly reaction, guaranteeing that the desulfurizing agent slurry drips and has enough reaction table areas and desulphurization reaction speed, and before entering deduster evaporate to dryness.Desulfurization duct adopts boiler flue or external reactor, to guarantee finishing desulphurization reaction greater than 1 second gas residence time.Structure and the flue gas flow concrete according to flue can be provided with one or more generator of alkali ne suspension.
It is the pulverized limestone of main component that desulfurizing agent adopts usually with calcium oxide or calcium hydroxide, and the form with solid-state calcium sulfate and calcium sulfite behind sulfur dioxide in flue gas and the reactive desulfurizing agent is stayed in the sorbent particle admittedly, and product is dry state.Flue gas after the desulfurization enters in the deduster, and desulfurization product and fly ash granule are collected by deduster, and wherein a part of particle optionally returns and desulfurizing agent mixing recycling, with further raising desulfuration efficiency and sorbent utilization.
The specific embodiment
From boiler back end ductwork, extract the small amount of thermal flue gas, enter alkaline spray generator by air distributor, the desulfurizing agent injection that wherein a part of air quantity carries from feed bin enters in the alkaline spray generator, with water droplet higher concentration collisional activation in alkaline spray generator of two-fluid spray nozzle atomizing, the online wet type desulfurizing agent slurry of making drips.Alkaline spray generator is connected on smoke canal elbow or other proper site, be mixed into continuously, equably in the flue gas of desulfurization duct by means of the centrifugal action of the effect of primary air, smoke canal elbow and effect that outlet helps jet mixing flow wet type desulfurizing agent alkali mist, in desulfurization duct, finish the desulfurization rapidly reaction of wet type desulfurizing agent at last online preparation in the alkaline spray generator.Flue gas after the desulfurization enters in the deduster, and desulfurization product, the sorbent particle and the fly ash granule of complete reaction are not collected by deduster, and wherein a part of particle optionally returns and desulfurizing agent mixing recycling.Wherein desulfurization duct can be the flue between boiler and the deduster, also can be newly-installed external reactor, carries out desulphurization reaction to guarantee the gas residence time greater than 1 second.Structure and the flue gas flow concrete according to desulfurization duct can be provided with one or more alkaline spray generators.
Substantive distinguishing features of the present invention and marked improvement are to prepare highly active desulfurization agent alkali mist by the online high concentration of generator of alkali ne suspension is set.Compare with spray drying FGD process, this method has fundamentally been avoided having removed complicated lime slurry preparation system simultaneously from owing to spray problems such as the obstruction of the atomizer that slurries cause and wearing and tearing, reactor be huge.Compare with conventional humidification activations such as LIFAC, this method because of avoided flying dust and desulfurizing agent and " robbed water " and water smoke and desulfurizing agent by flue gas dilution, the collisional activation efficient of sorbent particle and water droplets and the activity of desulfurizing agent have been improved greatly, increase substantially the utilization rate of smoke desulfurization efficiency and desulfurizing agent, reduced the volume of desulfurizer to greatest extent.Reaching under the identical smoke desulfurization efficiency, this sulfur method system is very simple, investment cost is extremely low, reliability is high and do not influence the operation of combustion apparatus, can reduce desulphurization plant investment cost and operating cost greatly.
Claims (7)
1, a kind of generator of alkali ne suspension fume desulphurization method, it is characterized in that method is specific as follows: generator of alkali ne suspension is set, the water droplet and the sorbent particle collisional activation under higher concentration that in generator of alkali ne suspension, atomize by two-fluid spray nozzle, finish the online preparation of wet type desulfurizing agent alkali mist, from boiler back end ductwork, extract a spot of hot flue gas or adopt air, enter generator of alkali ne suspension by air distributor, the desulfurizing agent injection that wherein a part of air quantity carries from feed bin enters generator of alkali ne suspension, with the water droplet that atomizes in two-fluid spray nozzle collisional activation under the higher concentration in generator of alkali ne suspension, the online wet type desulfurizing agent alkali mist of making; Then, the wet type desulfurizing agent alkali mist of online preparation is mixed in the flue gas in boiler flue or the external reactor continuously equably, finishes the desulfurization rapidly reaction therein, removes sulfur in smoke.
2, this generator of alkali ne suspension fume desulphurization method according to claim 1 is characterized in that, below further qualification that method is done:
Generator of alkali ne suspension is connected on the flue, by means of the centrifugal action of the effect of primary air, smoke canal elbow with and the effect that helps jet mixing flow that is provided with of outlet, quickening wet type desulfurizing agent alkali mist is mixed in the flue gas in boiler flue or the external reactor continuously, equably, the existence of sorbent particle surface moisture makes between sulfur dioxide gas and the sorbent particle ionic reaction takes place, in boiler flue or external reactor, finish the desulfurization rapidly reaction of wet type desulfurizing agent, remove sulfur in smoke.
3, this generator of alkali ne suspension fume desulphurization method according to claim 1 and 2 is characterized in that, boiler is to flue that is provided with certain time of staying between the deduster or external reactor, and gas residence time was greater than 1 second.
4, this generator of alkali ne suspension fume desulphurization method according to claim 1 and 2, it is characterized in that, concrete structure and flue gas flow according to desulfurization duct are provided with one or more generator of alkali ne suspension, and generator of alkali ne suspension is connected on the flue.
5, this generator of alkali ne suspension fume desulphurization method according to claim 1 and 2, it is characterized in that, the drop particle diameter of two-fluid spray nozzle atomizing can adapt to the requirement of follow-up flue desulfurization rapidly reaction, desulfurizing agent slurry drips and has enough reaction table areas and desulphurization reaction speed, and before entering deduster evaporate to dryness.
6, this generator of alkali ne suspension fume desulphurization method according to claim 1 and 2, it is characterized in that, desulfurizing agent is for being the pulverized limestone of main component with calcium oxide or calcium hydroxide, form with solid-state calcium sulfate and calcium sulfite behind sulfur dioxide in flue gas and the reactive desulfurizing agent is stayed in the sorbent particle admittedly, and product is dry state.
7, this generator of alkali ne suspension fume desulphurization method according to claim 1 and 2, it is characterized in that, flue gas after the desulfurization enters in the deduster, and desulfurization reaction product and fly ash granule are collected by deduster, and wherein a part of particle returns and desulfurizing agent mixing recycling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03116987 CN1194794C (en) | 2003-05-16 | 2003-05-16 | Multifluid alkaline fog generator smoke desulfuring method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03116987 CN1194794C (en) | 2003-05-16 | 2003-05-16 | Multifluid alkaline fog generator smoke desulfuring method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1471999A CN1471999A (en) | 2004-02-04 |
| CN1194794C true CN1194794C (en) | 2005-03-30 |
Family
ID=34152647
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03116987 Expired - Fee Related CN1194794C (en) | 2003-05-16 | 2003-05-16 | Multifluid alkaline fog generator smoke desulfuring method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1194794C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101780370B (en) * | 2010-02-03 | 2012-12-26 | 上海交通大学 | Desulphurizing device based on internal circulation W type multi-fluid alkali fog generator and desulphurizing method |
| CN101721907B (en) * | 2010-02-03 | 2011-09-28 | 上海交通大学 | Flue gas desulfurizing method for W-shaped multi-fluid alkaline spray generator |
| CN102989298B (en) * | 2012-11-30 | 2014-08-13 | 浙江泰来环保科技有限公司 | Acid-removing and desulfurizing device |
| CN106178877A (en) * | 2016-08-31 | 2016-12-07 | 大连华锐重工集团股份有限公司 | A kind of coke oven flue waste gas purification waste heat recovery apparatus and technique |
-
2003
- 2003-05-16 CN CN 03116987 patent/CN1194794C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1471999A (en) | 2004-02-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101357298A (en) | Circulating fluid bed flue gas desulfurization technique and device | |
| CN105477995A (en) | Method for removing sulfur trioxide from coal-fired flue gas | |
| CN106348373B (en) | A kind of waste water evaporation equipment and method of wastewater treatment and device | |
| CN105233656A (en) | Process used for removing sulfur trioxide in flue gas of coal-fired power plant | |
| CN105854575A (en) | Method for simultaneously treating SO3 and desulfurization waste water in exhaust gas of coal-fired power plant | |
| CN101385941B (en) | Efficient circulating fluid bed flue-gas desulfurizing device | |
| CN106582232A (en) | Synergistic removal tending to zero discharge purification process and equipment for multicomponent pollutants in flue gas | |
| CN217220890U (en) | Domestic waste burns flue gas denitration deacidification dust removal integration system of optimization | |
| CN105477998B (en) | A kind of low-energy-consumption high-efficiency calcium base wet-process desulfurizer and technique | |
| CN201085994Y (en) | Circulation fluidized bed smoke desulphurizing device | |
| CN1194794C (en) | Multifluid alkaline fog generator smoke desulfuring method | |
| CN206566758U (en) | A kind of SDA methods flue gas desulfurization technique accessory substance self-loopa synergistic device | |
| CN201168568Y (en) | Water-lime powder combined spray gun | |
| CN101288825B (en) | Semi-dry type fume cleaning method and device | |
| CN206810054U (en) | A kind of pre- desulfurization of coal-burning power plant's flue gas and the device of desulfurization wastewater drying crystalline | |
| CN208244435U (en) | Classification humidification flue gas desulfurization device based on spraying-fluidized bed reactor | |
| CN211435768U (en) | Flue gas treatment device for semi-dry desulfurization and low-temperature SCR denitration of carbide slag | |
| CN206295800U (en) | A kind of semi-dry flue gas desulfurization device | |
| CN202506310U (en) | Garbage-incinerated flue gas purification-combined deacidification system | |
| CN112023681A (en) | Method and system for performing circulating fluidized bed desulfurization by adopting rotary spray desulfurization ash | |
| CN101721907B (en) | Flue gas desulfurizing method for W-shaped multi-fluid alkaline spray generator | |
| CN206881495U (en) | Remove the device of sulfur dioxide in flue gas and mercury | |
| CN200940842Y (en) | Flue gas purifier of home refuse incinerator | |
| CN201930709U (en) | Novel semi-dry process flue gas desulfurization device | |
| CN206492392U (en) | A kind of desulfurization and ultra-clean dust collecting process system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20050330 Termination date: 20130516 |