CN106310914A - Low-rank-coal upgrading flue gas desulfurization and water recovery method and system - Google Patents
Low-rank-coal upgrading flue gas desulfurization and water recovery method and system Download PDFInfo
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- CN106310914A CN106310914A CN201610919125.3A CN201610919125A CN106310914A CN 106310914 A CN106310914 A CN 106310914A CN 201610919125 A CN201610919125 A CN 201610919125A CN 106310914 A CN106310914 A CN 106310914A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
- B01D53/502—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound characterised by a specific solution or suspension
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
- B01D53/265—Drying gases or vapours by refrigeration (condensation)
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/40—Alkaline earth metal or magnesium compounds
- B01D2251/404—Alkaline earth metal or magnesium compounds of calcium
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/60—Inorganic bases or salts
- B01D2251/608—Sulfates
Abstract
The invention discloses a low-rank-coal upgrading flue gas desulfurization and water recovery method and system. The method comprises the following steps: desulfurization: removing oxysulfides in flue gas; and water recovery: separating and recovering water in the flue gas. By using the method, the desulfurization step can be utilized to remove the oxysulfides in the low-rank-coal upgrading flue gas, thereby preventing the low-rank-coal upgrading flue gas from corroding the subsequent equipment and polluting the environment. The water recovery step is utilized to recover the water in the low-rank-coal upgrading flue gas, thereby saving the resources, and lowering the production operating cost of the enterprise. Besides, the invention also discloses a low-rank-coal upgrading flue gas desulfurization and water recovery system which has the same technical effects.
Description
Technical field
The present invention relates to technical field of coal chemical industry, particularly relate to a kind of flue gas to producing in low-order coal grading process and carry out
Desulfurization also reclaims the method and system of wherein moisture.
Background technology
Low-order coal is the general name of the coals such as mud coal, brown coal and jet coal, bottle coal, weakly caking coal, China's low-order coal reserves pole
It enriches, and constitutes about more than the 60% of coal in China reserves.It is high that low-order coal has water content, and fugitive constituent is high, the feature that calorific value is low,
And reactivity is high, easy spontaneous combustion, should not transport for long-distance.For a long time, China's exploitation, the coal utilized with bituminous coal, anthracite are
Main, and along with the sternness increasingly of domestic energy form, the upgrading of low-order coal utilizes and has obtained increasing attention.
At present, low-order coal upgrading technology both domestic and external can be divided into drying and dehydrating and pyrolysis two big classes.By being dried, by coal
Moisture be evaporated, reduce the water content in low-order coal.Coal is i.e. entered under isolation air or inert atmosphere conditions by pyrolysis
Row heating, the series of physical change of generation and chemical reaction, it is thus achieved that pyrolysis gas, semicoke and coal tar etc. are worth higher product
Product.But, there is shortcoming in low-order coal process for upgrading in terms of fume emission process, effective recycling water therein,
And the area of low-order coal rich reserves mostly is the province that water resource is more deficient, therefore, effective flue gas water reclamation technology seems
The most urgent.The off-gas recovery water technology that patented technology CN 101822910A provides, uses the mode of direct spraying cooling, right
Present in flue gas, steam and coal dust carry out cooling recovery.But, the tail gas produced in low-order coal grading process contains SO2Deng
Sulfide, this patent does not accounts for the impact of sulfide, certainly will cause the corrosion of equipment and the pollution of environment.
In view of this, the fume treatment mode producing existing low-order coal grading process is optimized, and reduces low-order coal and carries
Matter sulfide in flue gas and the discharge of micronic dust, it is to avoid environmental pollution；Reclaim about 70-90% low-order coal to be dried and be pyrolyzed simultaneously
Moisture produced by journey, has not only saved water resource, also reduces production run cost.
Summary of the invention
The purpose of the present invention is to provide a kind of low-order coal upgrading flue gas desulfurization and the method for Water Sproading, carries reducing low-order coal
Residual contaminants in matter flue gas, is separated and recovered from the moisture in low-order coal upgrading flue gas, and then protection equipment, environment, saving
Resource.Additionally, another object of the present invention for provide a kind of and that above-mentioned method for upgrading is corresponding low-order coal upgrading flue gas desulfurization and
The system of Water Sproading.
For solving above-mentioned technical problem, the present invention provides a kind of low-order coal upgrading flue gas desulfurization and the method for Water Sproading, bag
Include following steps:
Desulfurized step, removes low-order coal upgrading sulfureous in flue gas oxide；
Water Sproading step, is separated and recovered from the moisture in low-order coal upgrading flue gas.
Adopt in this way, the oxysulfide of residual in low-order coal upgrading flue gas can be removed by desulfurized step, reduce low
Pollutant component in the coal upgrading flue gas of rank, it is to avoid low-order coal upgrading flue gas is to the pollution to environment of the burn into of equipment.Additionally,
Also reclaim the moisture in low-order coal upgrading flue gas by Water Sproading step, saved resource, reduce production run cost.
Preferably, first carry out described desulfurized step, then perform described Water Sproading step.
Preferably, described desulfurized step particularly as follows:
Spray can absorb the absorbent of oxysulfide, makes low-order coal upgrading flue gas connect with described absorbent reverse flow
Touch, the serosity after recovery and low-order coal upgrading smoke reaction；
Again low-order coal upgrading flue gas is carried out except mist.
Preferably, further comprise the steps of: and air is inputted in reacted serosity so that it is oxidation generates gypsum slurries.
Preferably, described Water Sproading step particularly as follows:
Spraying cooling water, makes low-order coal upgrading flue gas contact with described cooling water reverse flow, reclaims and low-order coal upgrading
Moisture in flue gas；
Again low-order coal upgrading flue gas is carried out except mist；
Cooling the condensed water after reclaiming, a part is delivered to follow-up Water circulation processing means, another part weight again
New return system does spraying cooling water.
The present invention also provides for a kind of low-order coal upgrading flue gas desulfurization and the system of Water Sproading, including:
Desulphurization system, is used for removing low-order coal upgrading sulfureous in flue gas oxide；
Water reclamation system, is connected with described desulphurization system, for the moisture being separated and recovered from low-order coal upgrading flue gas.
Similar with the technique effect of above-mentioned method for upgrading, use this system, not remove only in low-order coal upgrading flue gas
The oxysulfide of residual, decreases the pollutant component in low-order coal upgrading flue gas, it is to avoid low-order coal upgrading flue gas is to equipment
The burn into pollution to environment.Additionally, the moisture also reclaimed in low-order coal upgrading flue gas, save resource, reduce production fortune
Row cost.
Preferably, described desulphurization system is provided with the first flue gas input pipe, the first flue gas exit pipe, and described water reclamation system sets
The second flue gas input pipe, the second flue gas exit pipe, described first flue gas exit pipe is had to be connected with described second flue gas input pipe.
Preferably, described desulphurization system includes outside fume desulfurizing tower, absorbent supply equipment, serosity oxidation furnaces and serosity
Row's equipment, described fume desulfurizing tower is sequentially provided with from top to bottom:
First accommodating area, the serosity formed after housing absorbent and absorbent reaction, it is provided with in accommodating area simultaneously and stirs
Mix device, so that serosity mix homogeneously, prevent precipitation；Described first flue gas input pipe；
First uptake zone, is provided with the multilamellar nozzle for spray-absorption agent；
First demister；Described first flue gas exit pipe；
Described absorbent supply equipment is that by described first accommodating area, absorbent is delivered to following of described first uptake zone
Ring pump；
Described serosity oxidation furnaces is the oxidation fan delivering the air to described first accommodating area.
Equipment of arranging outside described serosity is the slurry pump that gypsum slurries is delivered to gypsum dewatering equipment.
Preferably, also include gypsum dewatering equipment, be connected with described first accommodating area, be used for concentrating and removing gypsum slurries
In moisture, make gypsum product.
Preferably, described water reclamation system includes flue gas conical settling tank and condensed water heat sink；
Described flue gas conical settling tank is sequentially provided with from top to bottom:
Second accommodating area, is used for housing condensed water；Described second flue gas input pipe；
Second uptake zone, is provided with multiple nozzle for spraying cooling water；
Second demister；Second flue gas exit pipe；
Described condensed water heat sink includes:
Condensed water delivery pump, is delivered to condensed water cooling system by the condensed water of the second accommodating area；
Condensed water cooling system, cools the condensed water that condensed water delivery pump is sent here, and will cooling after cold
A solidifying water part delivers to described second uptake zone spraying cooling water as absorption tower；Another part is delivered to follow-up Water circulation and is processed
Device recycles after processing.
Preferably, described fume desulfurizing tower is arranged over flushing water nozzle, described flue gas water at described first demister
Recovery tower also is provided with flushing water nozzle above described second demister.
Accompanying drawing explanation
Fig. 1 is the structure of a kind of detailed description of the invention of the method for low-order coal flue gas desulfurization provided by the present invention and Water Sproading
Block diagram；
Fig. 2 is the structure of a kind of detailed description of the invention of the system of low-order coal flue gas desulfurization provided by the present invention and Water Sproading
Schematic diagram.
Wherein, in Fig. 2:
Fume desulfurizing tower 11；First accommodating area 111；First flue gas input pipe 112；Inlet baffle door a；First uptake zone
113；First demister 114；First flue gas exit pipe 115；Outlet damper door b；
Absorbent supply equipment 12；Agitator 121；Delivery pump 122；
Serosity oxidation furnaces 13: oxidation fan 131；
Slurry pump 132；
Gypsum dehydration equipment 14；
Flushing water nozzle 15；
Flue gas conical settling tank 21；Second accommodating area 211；Second flue gas input pipe 212；Second uptake zone 213；Second removes mist
Device 214；Second flue gas exit pipe 215；
Water-recorvery apparatus 22；Condensed water heat sink 221；Condensed water delivery pump 223；Condensed water cooling system 221；Follow-up
Recycling and processing device 222
Detailed description of the invention
The core of the present invention is a kind of low-order coal upgrading flue gas desulfurization and the method for Water Sproading, decreases low-order coal upgrading cigarette
Residual contaminants in gas, has been separated and recovered from the moisture in low-order coal upgrading flue gas, and then has played protection equipment, environment, joint
The about effect of resource.Additionally, another core of the present invention is for providing the low-order coal upgrading cigarette that a kind of and above-mentioned method for upgrading is corresponding
Desulfurization and the system of Water Sproading.
In order to make those skilled in the art be more fully understood that technical scheme, real with concrete below in conjunction with the accompanying drawings
The present invention is described in further detail to execute example.
It should be noted that the noun of locality " upper and lower " herein is all to set up on the basis of Figure of description, they
Occur not affecting protection scope of the present invention.
In a kind of detailed description of the invention, as it is shown in figure 1, the present invention provides a kind of low-order coal upgrading flue gas desulfurization and water to return
The method received, the method includes following two big steps: remove the desulfurized step of low-order coal upgrading sulfureous in flue gas oxide, Yi Jifen
From and reclaim the Water Sproading step of moisture in low-order coal upgrading flue gas.
Adopt in this way, the oxysulfide of residual in low-order coal upgrading flue gas can be removed by desulfurized step, reduce low
Pollutant component in the coal upgrading flue gas of rank, it is to avoid low-order coal upgrading flue gas is to the pollution to environment of the burn into of equipment.Additionally,
Also reclaim the moisture in low-order coal upgrading flue gas by Water Sproading step, saved resource, reduced production run for enterprise
Cost.In concrete scheme, first carry out desulfurized step, then perform Water Sproading step.
Owing to sulfur and oxide thereof all have stronger corrosivity to equipment, pipeline, therefore, after first carrying out desulfurization, then after
The working environment of continuous Water Sproading step is preferable, has the advantage that investment is low, operating cost is relatively low.
Certainly, said method can also first carry out Water Sproading step, perform desulfurized step again.
More specifically, desulfurized step particularly as follows:
Spray can absorb the absorbent of oxysulfide, makes low-order coal upgrading flue gas contact with absorbent reverse flow, returns
Serosity after receipts and low-order coal upgrading smoke reaction；
Again low-order coal upgrading flue gas is carried out except mist.
Above-mentioned absorbent is can be with oxysulfide generation chemical reaction substance, and present embodiment is selected as lime stone slurry
(it is mainly composed of CaCO3).Low-order coal upgrading flue gas and absorbent be inversely fully contacted, react during, absorbent
Low-order coal upgrading sulfureous in flue gas oxide and other acidic materials can be absorbed, produce the materials such as calcium sulfite.Further remove
Mist can separate the droplet carried secretly in low-order coal upgrading flue gas, reduces corrosion and fouling wind that upstream device is caused by desulfurization fume
Danger.
As can be seen here, the step of above-mentioned wet desulphurization is used can simply and effectively to realize flue gas desulfurization, certainly, above-mentioned
Desulfurized step can also use semi-dry desulphurization or dry desulfurization.
More specifically in scheme, the method for above-mentioned low-order coal flue gas desulfurization and Water Sproading further comprises the steps of: and is inputted by air
In reacted serosity so that it is oxidation generates gypsum slurries.
The gypsum slurries generated is delivered to gypsum dewatering equipment by slurry pump, and it concentrates and removes water therein
Point, make gypsum product, can turn waste into wealth, the creation of value.Gypsum dehydration technique is existing technique, repeats no more here.
Further in scheme, in the method for above-mentioned low-order coal flue gas desulfurization and Water Sproading, Water Sproading step particularly as follows:
Spraying cooling water, makes low-order coal upgrading flue gas contact with cooling water reverse flow, reclaims in low-order coal upgrading flue gas
Water；
Again low-order coal upgrading flue gas is carried out except mist；
Cooling the condensed water after reclaiming, a part is delivered to follow-up Water circulation processing means, another part weight again
New return system does spraying cooling water.
So, cooling water carries out reverse being fully contacted with low-order coal upgrading flue gas, and the two quickly carries out heat transfer so that
The temperature of low-order coal upgrading flue gas reduces rapidly, and then condenses rapidly the aqueous vapor comprised in low-order coal upgrading flue gas in liquid water
Reclaim.Then, the low-order coal upgrading flue gas after dehydration is further continued for up, by removing droplet therein further except mist.Meanwhile,
Condensed water after this step will cool is made full use of, and has both maintained being normally carried out of Water Sproading step, again can
The unnecessary water yield is carried out subsequent treatment, recycling, further saves resource, reduce the production run cost of enterprise.
The one that refer to the system that Fig. 2, Fig. 2 are low-order coal flue gas desulfurization provided by the present invention and Water Sproading is embodied as
The structural representation of mode.
In a kind of detailed description of the invention, as in figure 2 it is shown, the present invention provides a kind of low-order coal flue gas desulfurization and Water Sproading
System, including interconnective desulphurization system and water reclamation system, desulphurization system is used for removing low-order coal upgrading sulfureous in flue gas oxygen
Compound；Water reclamation system is for the moisture being separated and recovered from low-order coal upgrading flue gas.
Similar with the technique effect of above-mentioned method for upgrading, use this system, not remove only in low-order coal upgrading flue gas
Oxysulfide, decrease the pollutant component in low-order coal upgrading flue gas, it is to avoid the low-order coal upgrading flue gas burn into equipment
Pollution to environment.Additionally, also reclaimed the moisture in low-order coal upgrading flue gas by Water Sproading step, save resource, for
Enterprise reduces production run cost.
In concrete scheme, desulphurization system is provided with first flue gas input pipe the 112, first flue gas exit pipe 115, Water Sproading system
System is provided with second flue gas input pipe the 212, second flue gas exit pipe 215, the first flue gas exit pipe 115 and the second flue gas input pipe
212 connect.
It is to say, low-order coal upgrading flue gas carry out desulfurization by desulphurization system after, enter back into water reclamation system reclaim
Water, in such manner, it is possible to avoid sulfur and oxide thereof that equipment, pipeline are caused corrosion so that the working environment of follow-up Water Sproading step
Preferably, there is the advantage that investment is low, operating cost is relatively low.
Certainly, above-mentioned upgrading system not only limit this structure, it is also possible to by defeated with the first flue gas for the second flue gas exit pipe 215
Enter pipe 112 to connect, say, that low-order coal upgrading flue gas be introduced into water reclamation system carry out water be separated and recovered from, enter back into de-
Sulfur system carries out desulfurization.
In concrete scheme, above-mentioned desulphurization system includes fume desulfurizing tower 11 and absorbent supply equipment 12, absorption tower from
Under on be sequentially provided with:
First accommodating area 111, the serosity formed after housing absorbent, absorbent reaction, it is provided with in accommodating area simultaneously
Agitator 121, so that serosity mix homogeneously, prevents precipitation；First flue gas input pipe 112；
First uptake zone 113, is provided with multiple nozzle for spray-absorption agent；
First demister 114；First flue gas exit pipe 115；
Described absorbent supply equipment (12) is inhaled for absorbent is delivered to described first by described first accommodating area (111)
Receive the circulating pump (122) in district (113).
Described serosity oxidation furnaces is the oxidation fan delivering the air to described first accommodating area (111).
Equipment of arranging outside described serosity is the slurry pump that gypsum slurries is delivered to gypsum dewatering equipment.
Above-mentioned absorbent is the material that can react with oxysulfide generation chemical absorbing, present embodiment select for stone
Lime stone serosity (is mainly composed of CaCO3, usually containing calcium sulfite, calcium sulfate, unreacted desulfurization medium and noble gas
Deng mixture).In work process, first absorbent is delivered to the first accommodating area 111, utilizes agitator 121 by absorbent
Full and uniform mixing, the absorbent of the first accommodating area 111 is delivered to the first uptake zone 113 by recycling delivery pump 122.Low-order coal
Upgrading flue gas enters fume desulfurizing tower 11 from the first flue gas input pipe 112, flows from top to bottom, meanwhile, enters the first suction
The absorbent receiving district 113 sprays out by nozzle, flows from top to bottom, and the two is inversely fully contacted, reacts, and absorbent absorbs
Low-order coal upgrading sulfureous in flue gas oxide and other acidic materials, produce the materials such as calcium sulfite, become reacted serosity,
Land back again the first accommodating area 111.Low-order coal upgrading flue gas is advanced into the first demister 114 on continuing, and separates low order further
The droplet carried secretly in coal upgrading flue gas, reduces the fouling risk that upstream device is caused by desulfurization fume.
As can be seen here, the step of above-mentioned wet desulphurization is used can simply and effectively to realize flue gas desulfurization, certainly, above-mentioned
Desulfurized step can also use semi-dry desulphurization or dry desulfurization.
More specifically, as in figure 2 it is shown, can on the first flue gas input pipe 112 inlet porting baffle door a, at the first cigarette
Outlet damper door b is set on gas outlet tube 115, controls input pipe, the opening and closing of outlet tube by opening or closing two baffle doors,
The flue gas flow of input pipe, outlet tube, simultaneity factor parking maintenance can be controlled by the openings of sizes controlling two baffle doors
Time, two baffle doors are closed and can be completely cut off out by fume desulfurizing tower 11, advantageously ensures that the maintenance safety of personnel.
More specifically in scheme, above-mentioned desulphurization system also includes gypsum dewatering equipment 13, is connected with the first accommodating area 111,
By slurry pump, gypsum slurries is delivered to gypsum dewatering equipment carry out concentrating and remove moisture therein, make gypsum product.
So can recycle absorbing rear slurry, create new value, it is to avoid cause the wasting of resources, further
Reduce the cost needed for low-order coal upgrading flue gas.
In another kind of detailed description of the invention, above-mentioned water reclamation system includes flue gas conical settling tank 21 and condensed water heat sink
22；Flue gas conical settling tank 21 is sequentially provided with from top to bottom:
Second accommodating area 211, is used for housing condensed water；Second flue gas input pipe 212；
Second uptake zone 213, is provided with multiple nozzle for spraying cooling water；
Second demister 214；Second flue gas exit pipe 215；
Condensed water heat sink 22 includes:
Condensed water delivery pump, is delivered to condensed water cooling system (221) by the condensed water of the second accommodating area (211)；
Condensed water cooling system (221), cools the condensed water that condensed water delivery pump is sent here, and by after cooling
A condensed water part deliver to described second uptake zone (213) the spraying cooling water as smoke absorption tower；Another part is delivered to
Follow-up Water circulation processing means recycles after processing.
In work process, first cooling water being delivered to the second uptake zone 213, low-order coal upgrading flue gas is defeated from the second flue gas
Entering pipe 212 and enter flue gas conical settling tank 21, so that cooling water carries out reverse being fully contacted with low-order coal upgrading flue gas, the two is fast
Speed carries out heat transfer so that the temperature of low-order coal upgrading flue gas reduces rapidly, and then by fast for the aqueous vapor in low-order coal upgrading flue gas
Quickly cooling is solidifying in liquid water, drops to the bottom of flue gas conical settling tank 21.Then, reclaim the low-order coal upgrading flue gas after moisture followed by
Continuous up, by the second demister 214, the droplet that further removal is wherein carried secretly.Meanwhile, condensed water heat sink 22 and water return
Receive processing means and the water of condensation has been carried out cooling and reuse, both maintained the normal use of flue gas conical settling tank 21, and again could
The unnecessary water yield is carried out subsequent treatment, recovery, further saves resource.
In another kind of detailed description of the invention, fume desulfurizing tower 11 sprays at the flushing water that is arranged over of the first demister 114
Mouth 14, flue gas conical settling tank 21 also are provided with flushing water nozzle 14 above the second demister 214.
After used a period of time, the impurity in the low-order coal upgrading flue fog drip of interception can block except mist demister
Device, causes demister normally to work, and causes the pressure of system to increase, work condition abnormality simultaneously.Therefore, it can periodically except mist
Device is carried out, it is also possible at fume desulfurizing tower 11 pressure detecting part setting up and down, when detecting that in tower, pressure reduction is bigger, open
Open flooding nozzle, spray water to demister, demister is carried out, recover the fog removal performance of demister.And the most worked
Cheng Zhong, this flushing water nozzle 14 is in closed mode.
Above a kind of low-order coal upgrading flue gas desulfurization provided by the present invention and the method for Water Sproading, system are carried out in detail
Thin introduction.Principle and the embodiment of the present invention are set forth by specific case used herein, saying of above example
Bright method and the core concept thereof being only intended to help to understand the present invention.It should be pointed out that, the ordinary skill for the art
For personnel, under the premise without departing from the principles of the invention, it is also possible to the present invention is carried out some improvement and modification, these improve
Also fall in the protection domain of the claims in the present invention with modifying.
Claims (10)
1. a low-order coal upgrading flue gas desulfurization and the method for Water Sproading, it is characterised in that comprise the steps:
Desulfurized step, removes low-order coal upgrading sulfureous in flue gas oxide；
Water Sproading step, is separated and recovered from the moisture in low-order coal upgrading flue gas.
Low-order coal upgrading flue gas desulfurization the most according to claim 1 and the method for Water Sproading, it is characterised in that first carry out institute
State desulfurized step, then perform described Water Sproading step.
Low-order coal upgrading flue gas desulfurization the most according to claim 2 and the method for Water Sproading, it is characterised in that described desulfurization
Step particularly as follows:
Spray can absorb the absorbent of oxysulfide, makes low-order coal upgrading flue gas contact with described absorbent reverse flow, returns
Serosity after receipts and low-order coal upgrading smoke reaction；
The serosity reclaimed is aoxidized so that it is generate gypsum slurries；
Again low price coal upgrading flue gas is carried out except mist.
4. according to the low-order coal upgrading flue gas desulfurization described in any one of claim 1-3 and the method for Water Sproading, it is characterised in that
Described Water Sproading step particularly as follows:
Spraying cooling water, makes low-order coal upgrading flue gas contact with described cooling water reverse flow, reclaims in low-order coal upgrading flue gas
Moisture；
Again low-order coal upgrading flue gas is carried out except mist；
Cooling the moisture after reclaiming, a part is delivered to follow-up Water circulation processing means, and another part returns to again
System does cooling water.
5. a low-order coal upgrading flue gas desulfurization and the system of Water Sproading, it is characterised in that including:
Desulphurization system, is used for removing low-order coal upgrading sulfureous in flue gas oxide；
Water reclamation system, is connected with described desulphurization system, for the moisture being separated and recovered from low-order coal upgrading flue gas.
Low-order coal upgrading flue gas desulfurization the most according to claim 5 and the system of Water Sproading, it is characterised in that described desulfurization
System is provided with the first flue gas input pipe (112), the first flue gas exit pipe (115), and it is defeated that described water reclamation system is provided with the second flue gas
Enter pipe (212), the second flue gas exit pipe (215), described first flue gas exit pipe (115) and described second flue gas input pipe
(212) connect.
Low-order coal upgrading flue gas desulfurization the most according to claim 6 and the system of Water Sproading, it is characterised in that described desulfurization
System includes fume desulfurizing tower (11), absorbent supply equipment (12), serosity oxidation furnaces, and described fume desulfurizing tower is from top to bottom
It is sequentially provided with:
First accommodating area (111), the gypsum slurries formed after housing absorbent and absorbent reaction, the first accommodating area
(111) agitator (121) of stirring serosity it is provided with in；Described first flue gas input pipe (112)；
First uptake zone (113), is provided with multiple nozzle for spray-absorption agent；
First demister (114)；Described first flue gas exit pipe (115)；
Described absorbent supply equipment (12) includes that by described first accommodating area (111), absorbent is delivered to described first absorbs
The circulating pump (122) in district (113)；
Described serosity oxidation furnaces is the oxidation fan (131) delivering the air to described first accommodating area (111).
Low-order coal upgrading flue gas desulfurization the most according to claim 7 and the system of Water Sproading, it is characterised in that also include stone
Cream dehydration device (13), is connected with described first accommodating area (111), for concentrating and remove the moisture in gypsum slurries, makes
Gypsum Fibrosum；Described gypsum dewatering equipment (13) also includes arranging outside serosity equipment, and equipment of arranging outside described serosity is to be carried by gypsum slurries
Slurry pump (132) to described gypsum dewatering equipment (14).
Low-order coal upgrading flue gas desulfurization the most according to claim 7 and the system of Water Sproading, it is characterised in that described water returns
Receipts system includes flue gas conical settling tank (21) and condensed water heat sink (221)；
Described flue gas conical settling tank (21) is sequentially provided with from top to bottom:
Second accommodating area (211), is used for housing condensed water；Described second flue gas input pipe (212)；
Second uptake zone (213), is provided with multiple nozzle for spraying cooling water；
Second demister (214)；Second flue gas exit pipe (215)；
Described condensed water heat sink (22) including:
Condensed water delivery pump (223), is delivered to condensed water heat sink (221) by the condensed water of the second accommodating area (211)；
Condensed water heat sink (221), cools the condensed water that condensed water delivery pump is sent here, and will cooling after cold
A solidifying water part delivers to described second uptake zone (213) the spraying cooling water as absorption tower；Another part delivers to subsequent recovery
Processing means (222) recycles after processing.
Low-order coal upgrading flue gas desulfurization the most according to claim 9 and the system of Water Sproading, it is characterised in that described cigarette
Desulfurization tower (11) is arranged over flushing water nozzle (14), described flue gas conical settling tank described first demister (114)
(21) top described second demister (214) also is provided with flushing water nozzle (14).
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