CN109248558A - A method of removing sulfur dioxide gas - Google Patents
A method of removing sulfur dioxide gas Download PDFInfo
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- CN109248558A CN109248558A CN201811162418.7A CN201811162418A CN109248558A CN 109248558 A CN109248558 A CN 109248558A CN 201811162418 A CN201811162418 A CN 201811162418A CN 109248558 A CN109248558 A CN 109248558A
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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
- 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
- B01D2251/602—Oxides
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Abstract
The present invention relates to a kind of methods for removing sulfur dioxide gas, boiler combustion is generated into sulfur-containing smoke gas after deduster dedusting, it is boosted by air-introduced machine, cooling down by heat exchanger to sulfur-containing smoke gas after boosting, sulfur-containing smoke gas after cooling is entered in desulfurization spray absorber by absorb the bottom of the tower, the lime stone slurry sprayed into sulfur-containing smoke gas and absorption tower in absorption tower reacts, and is purged to the sulfur dioxide after sulfur-containing smoke gas；The sulfur dioxide gas in flue gas can not only be effectively removed using this method, and can prepare the chemical by-product with utility value, while can carry out purified treatment and reuse to the ejected wash water generated in treatment process, save the utilization of water resource.
Description
Technical field
The present invention relates to a kind of processing method of polluted gas, in particular to a kind of method for removing sulfur dioxide gas.
Background technique
Current the problem of influencing China's Environmental security, is more, and wherein atmospheric environmental security problem is especially more prominent, and two
The main reason for pollution of sulfur oxide is atmosphere pollution again.In China, coal-burning boiler is the first big pollution for discharging sulfur dioxide
Source, as China's economy persistently rapidly develops, process of industrialization is accelerated, and population is continuously increased, and coal-burning boiler provides greatly to us
Serious pollution also is brought to China's environment while calorimetric motility, wherein the tightest with sulfur dioxide and smoke contamination
Weight, directly results in the generation of China some areas environmental security, causes to people's health and ecological environment huge
Loss.
Sulfur dioxide is toxic corrosive gas a kind of colourless and with intense irritation smell, to human health,
Growth and development of plants and animals and ecological environment, which all exist, to be seriously endangered, it is that current amount of contamination is maximum, and influence degree is most deep
Air environmental pollution substance.It has corrosion irritation, as long as content is up to 0.1 × 10 in air6G/m3 just deposits human health
Respiratory tract can be stimulated, bronchial spasm is caused due to the toxic effect of gas itself in potential threat, vomiting is may cause, exhales
Inhale the difficult and disturbance of consciousness.
Sulfur dioxide while endangering human health it return the mankind another serious Environmental security brought to ask
Topic --- acid rain.Oxidation of the sulfur dioxide by oxygen in air in atmosphere, is then mixed to form acid rain with precipitation.Acid rain pair
The influence and destruction of the ecosystem, which are mainly manifested in, makes soil acidification and impoverishment, and crops and Forest Growth slow down, lake water acid
Change, fish growth is suppressed, and has corrosiveness, accelerated weathering process etc. to building and material.In addition, many for building
The materials such as structure, bridge, dam, industrial equipment, water supply network, buried tank, turbine-generator units, electric power and communication apparatus
Different degrees of receives the corrosion of acid rain.
Thus, it could be seen that control coal-burning boiler sulfur dioxide pollution, has control China's air environmental pollution of crucial importance
Meaning, coal burning flue gas desulfurization is China's current development economy, the significant task for solving the problems, such as atmospheric environmental security.Thus
It is found that develop the economy rationally, technically reliable, environment be up to standard, flue gas desulfurization technique of resource recoverable is that current letter waits solving
Major issue certainly.
Summary of the invention
The method of a kind of removing sulfur dioxide gas proposed the purpose of the present invention is to solve background technique, by pot
Furnace burning generates sulfur-containing smoke gas after deduster dedusting, is boosted by air-introduced machine, after boosting by heat exchanger to containing
Sulphur flue gas cools down, and the sulfur-containing smoke gas after cooling is entered in desulfurization spray absorber by absorb the bottom of the tower, contains in absorption tower
The lime stone slurry sprayed into sulphur flue gas and absorption tower reacts, and is purged to the sulfur dioxide after sulfur-containing smoke gas；Using the party
Method can not only effectively remove the sulfur dioxide gas in flue gas, additionally it is possible to the content of sulfur dioxide of tail gas is monitored, and
And the chemical by-product with utility value can be prepared；Meanwhile, it is capable to be purified to the ejected wash water generated in treatment process
Processing and reuse, save the utilization of water resource, have broad application prospects.
To achieve the goals above, present invention employs following technical solutions:
A method of removing sulfur dioxide gas, this method specifically:
Boiler combustion is generated into sulfur-containing smoke gas after deduster dedusting first, is boosted by air-introduced machine, the warp after boosting
It crosses heat exchanger to cool down to sulfur-containing smoke gas, the sulfur-containing smoke gas after cooling is entered in desulfurization spray absorber by absorb the bottom of the tower；
Blocky lime is added in feed bin using automobile or bull-dozer, by the way that the oscillating feeder of bin bottom is arranged in stone
Lime stone carries out swing crushing and broken lime stone is delivered in crusher, and crusher be crushed to lime stone and is delivered to again
In ball mill, the limestone powder after ball milling imports stirring in slurries stirred tank together with clear water and forms limestone slurry, slurries
Slurries are pumped into solid-liquid separator by circulating pump and carry out solid-liquid separation treatment in stirred tank, and large scale lime stone is by solid-liquid point
It repeats to grind from ball mill is sent back to after device discharge again, the lime stone slurry of release mesh is pumped into absorption tower by slurries；
With upstream smoke contacts during spray, chemistry occurs absorbing liquid for lime stone and sulfur dioxide in absorbing liquid
Reaction, lime stone absorbing liquid generate calcium sulfite by the sulfur dioxide contained in reactive absorption flue gas, and calcium sulfite continues quilt
Air oxidation in stock tank is recycled, calcium sulfate is generated, the fresh limestone absorbing liquid ground is continuously added to absorb the bottom of the tower
In cyclic absorption liquid bath, to substitute the lime stone consumed because neutralization reaction occurs；
Sulfur-containing smoke gas after being cleaned is exchanged heat by heat exchanger to heat up, by the way that after deduster dedusting, flue gas passes through itself after heating
Lifting power by smoke stack emission into atmospheric environment；The stone slurry of fully reacting is discharged through absorption tower, then passes through separator
It being separated by solid-liquid separation, obtained solid component is delivered in filter, and flushing water is rinsed the solid component in filter,
Solid portion after flushing is delivered to by conveyer to be dried to obtain gypsum in drying machine, and the ejected wash water for rinsing generation passes through
Ejected wash water treatment process carries out harmless treatment；
The ejected wash water that filtration and washing is generated is quenched by being measured in pipeline feeding conditioning tank to waste water, and ejected wash water is being adjusted
Section stays for some time in pond, and ejected wash water is imported in primary reaction pond by water pump, sodium carbonate is added into primary reaction pond, instead
It should a period of time；Ejected wash water is sent into primary clarifier by pipeline, after precipitating a period of time, is sent by water pump secondary anti-
Heavy metal chelating agent, reaction a period of time are added into secondary reaction pond by Ying Chizhong；Ejected wash water is sent into secondary sink by pipeline
In the pond of shallow lake, after precipitating a period of time, the supernatant in post-precipitate pond is sent into filter device by water pump further by waste water
Middle graininess impurity removal；The bottom material of primary clarifier and the precipitating in post-precipitate pond carries out dehydration separation by solid-liquid separator
It is dried to obtain mud cake by drying machine afterwards, mud cake is recycled, and the liquid after dehydration separation imports primary anti-
Pond is answered to be handled again；Supernatant derived from filter device is pumped to enrichment facility by water, to filtered supernatant into
Row concentration removes salt treatment, and the desalination water after desalination is back in conditioning tank, remaining a small amount of high-salt concentrated shrink be sent into evaporating column into
Row evaporation, evaporating column are heated by the heat exchanger connecting with cigarette road pipeline.
As further restriction of the invention, sodium carbonate amount is 40-70 kilograms of slurries dosage per ton；The heavy metal
Agent for capturing is thiocarbamates, 1-5 kilograms of clear liquid dosage per ton.
Meanwhile the invention also discloses to flue gas carry out desulfurization process after, to the sulfur dioxide in flue gas content after desulfurization
The monitoring method being monitored, the monitoring method specifically: quantitative flue gas is extracted in sampling air pump timing from chimney, flue gas from
Air pump is sampled to be sent into moisture trap, then No.1 solenoid valve and air pump enter air storage chamber, flue gas by No. four solenoid valves or
No. five solenoid valves respectively enter No.1 sensor gas chamber or No. two sensor gas chambers, are sensed by the sulfur dioxide being arranged in gas chamber
Device calculates the content of sulfur dioxide in flue gas, obtains the concentration of sulfur dioxide in flue gas.
As further restriction of the invention, sampling monitoring process further include: when detection sulfur dioxide concentration, open one
Number solenoid valve, No. two solenoid valves are closed, and flue gas enters air storage chamber by air pump, opens No. four solenoid valves, close No. five solenoid valves,
Concentration monitor is carried out in No.1 sensor gas chamber；After detecting a period of time, No. two solenoid valves are opened, close No.1 solenoid valve, it is empty
Gas enters air storage chamber by air pump and No.1 sensor gas chamber cleans SO 2 sensor；After cleaning, close
No. four solenoid valves close solenoid valve, open No.1 solenoid valve and No. five solenoid valves, use No. two indoor sensors of sensor gas
Carry out concentration monitor；After detecting a period of time, No. two solenoid valves are opened, close No.1 solenoid valve, air enters storage by air pump
Gas chamber and sensor gas chamber clean SO 2 sensor.
As further restriction of the invention, absorption tower includes slurries memory paragraph, super-thin spray absorber portion, conventional spray
Absorber portion, demisting section, high efficiency demister, Mechanical nozzle, pressure gauge, regulating valve, high pressure washing pump, filtered water tank, blender, slurry
Liquid circulating pump, slurries stirred tank, blender, oxidation fan, atomizer, strengthens spray thrower, smoke inlet, flue gas at slurries pump
Outlet；The slurries being stored in slurries stirred tank pass through Pipeline transport into slurries memory paragraph by slurries pump, then pump in slurries
Under the action of, it is transported to super-thin spray and absorbs and sprayed in super-thin spray absorber portion by atomizer with conventional spraying layer, slurries
Out, the atomized particles of generation and the smoke contacts inputted by smoke inlet, realize the desulfurization to sulfur-containing smoke gas；Slurries are in conventional spray
It is sprayed in leaching absorber portion III by Mechanical nozzle, generates the droplet of greater particle size, contacted with sulfur-containing smoke gas, realize secondary desulfuration；
Settle, gathered in slurries memory paragraph under the slurries of desulfidation are completed the gravity the effects of, the slurries of sedimentation with from slurry
Freshly prepd lime stone slurry is uniformly mixed under the action of blender in liquid stirred tank, and intermediate reaction object is in oxidation fan
Under the action of carry out oxidation reaction；Flue gas after first and second desulfurization carries part droplet and continues up to demisting section,
In the region of demisting section after high efficiency demister carries out demisting, absorption tower is discharged by exhanst gas outlet；Clear water passes through filtered water tank
It is delivered to demisting section by high pressure washing pump, regulating valve, pressure gauge, regulating valve, pressure gauge are used to control the pressure and stream of clear water
Amount.
As further restriction of the invention, strengthening spray thrower is four layers of circular spray tube road being arranged concentrically, each
Nozzle surrounds the concentric circles equidistant with absorption tower tower wall, and atomizer is along absorption tower tower wall arranged tangential, the atomization ejected
Microparticle jetting is circumferentially formed thereon the circle of contact of different-diameter；In vertical direction, atomized particles are because inertia moves downward, because of flue gas
Stream effect is stagnated, and atomized particles are moved upwards with air-flow, and it is upward again downwards that multiple elder generations are formed in super-thin spray absorber portion
Turbulent region.
Wherein, range of the number of plies of atomizer arrangement mainly according to the atomizer of the diameter and use on absorption tower carries out
Design avoids the occurrence of desulfurization dead angle to ensure that entire absorption tower cross section is full of the lime stone slurry of atomizing particle shape.
It is gas passage inside atomizer as further restriction of the invention, outside is slurry channels, flue
The end in road has the contraction section that gradually decreases of internal diameter, the contraction section that there is internal diameter to gradually decrease for the end of slurry channels and with receipts
The expansion segment of contracting section connection；The angle of slurry channels relative nozzle outlet is 45 °, the axis of gas passage and jet expansion direction
Unanimously, slurry channels tangentially enter along outer nozzle wall, lime of the gas after gas passage is depressured speedup with slurry channels outlet
Internal mix chamber of the stone slurries in front of jet expansion is mixed.
The beneficial effects of the present invention are:
1, the sulfur dioxide gas in flue gas can not only be effectively removed using this method, and can be prepared with utility value
Chemical by-product.
2, it is provided with the treatment process of ejected wash water in the present invention, can not only ensure entire process flow discharge gas and water
It is innoxious, additionally it is possible to realize ejected wash water treated and recycle, save the usage amount of water resource.
3, it enables to lime stone slurry tangentially to enter along outer nozzle wall using the atomizer in the present invention, can both have
Effect avoids hard particles in lime stone slurry to the direct erosive wear of nozzle tube wall, and can be threadingly advanced and avoid lime stone slurry
It stops or blocks in nozzle.
4, the reinforcing spray thrower in the present invention is using four layers of circular spray tube road being arranged concentrically, and atomizer is along absorption
Tower tower wall arranged tangential, the atomized particles jet stream ejected are circumferentially formed thereon the tangential circular arc of different-diameter, can combine
The design of nozzle ensures that entire absorption tower cross section is full of the lime stone slurry of atomizing particle shape, avoids the occurrence of desulfurization dead angle.
Detailed description of the invention
Fig. 1 is a kind of process flow diagram of method for removing sulfur dioxide gas proposed by the present invention.
Fig. 2 is the flow diagram of gas monitoring method in a kind of method for removing sulfur dioxide gas proposed by the present invention
Fig. 3 is a kind of structural schematic diagram on absorption tower proposed by the present invention.
Fig. 4 is the structural schematic diagram for strengthening spray thrower in absorption tower proposed by the present invention.
Fig. 5 is the structural schematic diagram of atomizer in absorption tower proposed by the present invention.
Specific embodiment
It is next combined with specific embodiments below that the present invention is further described.
Embodiment one
Referring to Fig.1, a method of removing sulfur dioxide gas, this method specifically:
Boiler combustion is generated into sulfur-containing smoke gas after deduster dedusting first, is boosted by air-introduced machine, the warp after boosting
It crosses heat exchanger to cool down to sulfur-containing smoke gas, the sulfur-containing smoke gas after cooling is entered in desulfurization spray absorber by absorb the bottom of the tower；
Blocky lime is added in feed bin using automobile or bull-dozer, by the way that the oscillating feeder of bin bottom is arranged in stone
Lime stone carries out swing crushing and broken lime stone is delivered in crusher, and crusher be crushed to lime stone and is delivered to again
In ball mill, the limestone powder after ball milling imports stirring in slurries stirred tank together with clear water and forms limestone slurry, slurries
Slurries are pumped into solid-liquid separator by circulating pump and carry out solid-liquid separation treatment in stirred tank, and large scale lime stone is by solid-liquid point
It repeats to grind from ball mill is sent back to after device discharge again, the lime stone slurry of release mesh is pumped into absorption tower by slurries；
With upstream smoke contacts during spray, chemistry occurs absorbing liquid for lime stone and sulfur dioxide in absorbing liquid
Reaction, lime stone absorbing liquid generate calcium sulfite by the sulfur dioxide contained in reactive absorption flue gas, and calcium sulfite continues quilt
Air oxidation in stock tank is recycled, calcium sulfate is generated, the fresh limestone absorbing liquid ground is continuously added to absorb the bottom of the tower
In cyclic absorption liquid bath, to substitute the lime stone consumed because neutralization reaction occurs；
Sulfur-containing smoke gas after being cleaned is exchanged heat by heat exchanger to heat up, by the way that after deduster dedusting, flue gas passes through itself after heating
Lifting power by smoke stack emission into atmospheric environment；The stone slurry of fully reacting is discharged through absorption tower, then passes through separator
It being separated by solid-liquid separation, obtained solid component is delivered in filter, and flushing water is rinsed the solid component in filter,
Solid portion after flushing is delivered to by conveyer to be dried to obtain gypsum in drying machine, and the ejected wash water for rinsing generation passes through
Ejected wash water treatment process carries out harmless treatment；
The ejected wash water that filtration and washing is generated is quenched by being measured in pipeline feeding conditioning tank to waste water, and ejected wash water is being adjusted
Section stays for some time in pond, and ejected wash water is imported in primary reaction pond by water pump, sodium carbonate is added into primary reaction pond, instead
It should a period of time；Ejected wash water is sent into primary clarifier by pipeline, after precipitating a period of time, is sent by water pump secondary anti-
Heavy metal chelating agent, reaction a period of time are added into secondary reaction pond by Ying Chizhong；Ejected wash water is sent into secondary sink by pipeline
In the pond of shallow lake, after precipitating a period of time, the supernatant in post-precipitate pond is sent into filter device by water pump further by waste water
Middle graininess impurity removal；The bottom material of primary clarifier and the precipitating in post-precipitate pond carries out dehydration separation by solid-liquid separator
It is dried to obtain mud cake by drying machine afterwards, mud cake is recycled, and the liquid after dehydration separation imports primary anti-
Pond is answered to be handled again；Supernatant derived from filter device is pumped to enrichment facility by water, to filtered supernatant into
Row concentration removes salt treatment, and the desalination water after desalination is back in conditioning tank, remaining a small amount of high-salt concentrated shrink be sent into evaporating column into
Row evaporation, evaporating column are heated by the heat exchanger connecting with cigarette road pipeline.
Wherein, sodium carbonate amount is 40-70 kilograms of slurries dosage per ton；The heavy metal chelating agent is sulphide amino formic acid
Salt, 1-5 kilograms of clear liquid dosage per ton.
Embodiment two
With reference to Fig. 2, as another embodiment of the present invention, this method further include to the sulfur dioxide in flue gas content after desulfurization into
The monitoring method of row monitoring, the monitoring method specifically: quantitative flue gas is extracted in sampling air pump timing from chimney, and flue gas is from taking
Sample air pump is sent into moisture trap, and then No.1 solenoid valve and air pump enter air storage chamber, and flue gas passes through No. four solenoid valves or five
Number solenoid valve respectively enters No.1 sensor gas chamber or No. two sensor gas chambers, passes through the SO 2 sensor being arranged in gas chamber
Content of sulfur dioxide in flue gas is calculated, obtains the concentration of sulfur dioxide in flue gas.
Wherein, sampling monitoring process further include: when detecting sulfur dioxide concentration, open No.1 solenoid valve, No. two electromagnetism
Valve is closed, and flue gas enters air storage chamber by air pump, opens No. four solenoid valves, No. five solenoid valves is closed, in No.1 sensor gas chamber
Carry out concentration monitor；After detecting a period of time, No. two solenoid valves are opened, close No.1 solenoid valve, air enters storage by air pump
Gas chamber and No.1 sensor gas chamber clean SO 2 sensor；After cleaning, No. four solenoid valves are closed, close electricity
Magnet valve opens No.1 solenoid valve and No. five solenoid valves, carries out concentration monitor using the indoor sensor of No. two sensor gas；Detection
After a period of time, No. two solenoid valves are opened, close No.1 solenoid valve, air enters air storage chamber and sensor gas chamber pair by air pump
SO 2 sensor is cleaned.
Embodiment three
With reference to Fig. 3-5, as another embodiment of the present invention, absorption tower include slurries memory paragraph I, super-thin spray absorber portion II,
Conventional spray-absorption section III, demisting section IV, high efficiency demister 1, Mechanical nozzle 2, pressure gauge 3, regulating valve 4, high pressure washing pump
5, filtered water tank 6, blender 7, slurry circulating pump 8, slurries pump 9, slurries stirred tank 10, blender 11, oxidation fan 12, atomization spray
Mouth 13 strengthens spray thrower 14, smoke inlet 15, exhanst gas outlet 16；The slurries being stored in slurries stirred tank 10, by slurries pump 9
Through Pipeline transport into slurries memory paragraph I, then under the action of slurries pump 8, it is transported to II He of super-thin spray absorber portion
Conventional spraying layer III, slurries are sprayed in super-thin spray absorber portion II by atomizer 13, the atomized particles of generation with by flue gas
The smoke contacts that entrance 15 inputs realize the desulfurization to sulfur-containing smoke gas；Slurries are in conventional spray-absorption section III by mechanically spraying
Mouth 2 sprays, and generates the droplet of greater particle size, contacts with sulfur-containing smoke gas, realizes secondary desulfuration；The slurries of desulfidation are completed in weight
It settles, is gathered in slurries memory paragraph I under the effects of power, the slurries of sedimentation and the freshly prepd stone in slurries stirred tank 10
Lime stone slurries are uniformly mixed under the action of blender 11, and realization recycles, and intermediate reaction object is in oxidation fan 12
Effect is lower to carry out oxidation reaction；Flue gas after first and second desulfurization carries part droplet and continues up to demisting section IV,
In the region of demisting section IV after high efficiency demister 1 carries out demisting, absorption tower is discharged by exhanst gas outlet 16；Clear water passes through clear
Water tank 6 is delivered to demisting section IV by high pressure washing pump 5, regulating valve 4, pressure gauge 3, and regulating valve 4, pressure gauge 3 are used to control clear
The pressure and flow of water.
Wherein, strengthening spray thrower 14 is four layers of circular spray tube road being arranged concentrically, and each atomizer 13 is surrounded and inhaled
The equidistant concentric circles of tower tower wall is received, atomizer 13 is along absorption tower tower wall arranged tangential, the atomized particles jet stream edge ejected
The circle of contact of circumferencial direction formation different-diameter；In vertical direction, atomized particles are because inertia moves downward, because cigarette airflow function occurs
It stagnates, atomized particles move upwards with air-flow, and multiple elder generations upward turbulent area again downwards is formed in super-thin spray absorber portion II
Domain.
Wherein, range of the number of plies of atomizer arrangement mainly according to the atomizer of the diameter and use on absorption tower carries out
Design avoids the occurrence of desulfurization dead angle to ensure that entire absorption tower cross section is full of the lime stone slurry of atomizing particle shape.
Wherein, be gas passage inside atomizer 13, outside is slurry channels, the end of gas pipeline have internal diameter by
The end of decrescence few contraction section, slurry channels has the internal diameter contraction section gradually decreased and the expansion segment connecting with contraction section；
The angle of slurry channels relative nozzle outlet is 45 °, and the axis of gas passage is consistent with jet expansion direction, and slurry channels are along spray
Mouth outer wall tangentially enters, and lime stone slurry of the gas after gas passage is depressured speedup with slurry channels outlet is before jet expansion
The internal mix chamber of side is mixed.
The present invention by by boiler combustion generate sulfur-containing smoke gas after deduster dedusting, boosted by air-introduced machine,
Cooling down by heat exchanger to sulfur-containing smoke gas after boosting, the sulfur-containing smoke gas after cooling enter desulfurization by absorb the bottom of the tower and spray
In absorption tower, the lime stone slurry sprayed into sulfur-containing smoke gas and absorption tower in absorption tower reacts, to the dioxy after sulfur-containing smoke gas
Change sulphur to be purged；The sulfur dioxide gas in flue gas can not only be effectively removed using this method, additionally it is possible to the two of tail gas
Sulfur oxide content is monitored, and can prepare the chemical by-product with utility value, while can be in treatment process
The ejected wash water of generation carries out purified treatment and reuse, saves the utilization of water resource, has broad application prospects.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (7)
1. a kind of method for removing sulfur dioxide gas, it is characterised in that: boiler combustion is generated sulfur-containing smoke gas by removing first
After dirt device dedusting, boosted by air-introduced machine, cooling down by heat exchanger to sulfur-containing smoke gas after boosting, containing after cooling
Sulphur flue gas is entered in desulfurization spray absorber by absorb the bottom of the tower；
Blocky lime is added in feed bin with automobile or bull-dozer, by the way that the oscillating feeder of bin bottom is arranged in lime
Stone carries out swing crushing and broken lime stone is delivered in crusher, and crusher be crushed to lime stone is delivered to ball again
In grinding machine, the limestone powder after ball milling imports stirring in slurries stirred tank together with clear water and forms limestone slurry, and slurries stir
It mixes slurries in slot and is pumped into solid-liquid separator by circulating pump and carry out solid-liquid separation treatment, large scale lime stone is by being separated by solid-liquid separation
Ball mill is sent back to after device discharge again to repeat to grind, the lime stone slurry of release mesh is pumped into absorption tower by slurries；
With upstream smoke contacts during spray, chemistry occurs absorbing liquid for lime stone and sulfur dioxide in absorbing liquid
Reaction, lime stone absorbing liquid generate calcium sulfite by the sulfur dioxide contained in reactive absorption flue gas, and calcium sulfite continues quilt
Air oxidation in stock tank is recycled, calcium sulfate is generated, the fresh limestone absorbing liquid ground is continuously added to absorb the bottom of the tower
In cyclic absorption liquid bath, the lime stone consumed because neutralization reaction occurs is substituted；
Sulfur-containing smoke gas after being cleaned is exchanged heat by heat exchanger to heat up, by the way that after deduster dedusting, flue gas passes through itself after heating
Lifting power by smoke stack emission into atmospheric environment；The stone slurry of fully reacting is discharged through absorption tower, then passes through separator
It being separated by solid-liquid separation, obtained solid component is delivered in filter, and flushing water is rinsed the solid component in filter,
Solid portion after flushing is delivered to by conveyer to be dried to obtain gypsum in drying machine, and the ejected wash water for rinsing generation passes through
Ejected wash water treatment process carries out harmless treatment；
The ejected wash water that filtration and washing is generated is quenched by being measured in pipeline feeding conditioning tank to waste water, and ejected wash water is being adjusted
Section stays for some time in pond, and ejected wash water is imported in primary reaction pond by water pump, sodium carbonate is added into primary reaction pond, instead
It should a period of time；Ejected wash water is sent into primary clarifier by pipeline, after precipitating a period of time, is sent by water pump secondary anti-
Heavy metal chelating agent, reaction a period of time are added into secondary reaction pond by Ying Chizhong；Ejected wash water is sent into secondary sink by pipeline
In the pond of shallow lake, after precipitating a period of time, the supernatant in post-precipitate pond is sent into filter device by water pump further by waste water
Middle graininess impurity removal；The bottom material of primary clarifier and the precipitating in post-precipitate pond carries out dehydration separation by solid-liquid separator
It is dried to obtain mud cake by drying machine afterwards, mud cake is recycled, and the liquid after dehydration separation imports primary anti-
Pond is answered to be handled again；Supernatant derived from filter device is pumped to enrichment facility by water, to filtered supernatant into
Row concentration removes salt treatment, and the desalination water after desalination is back in conditioning tank, remaining a small amount of high-salt concentrated shrink be sent into evaporating column into
Row evaporation, evaporating column are heated by the heat exchanger connecting with cigarette road pipeline.
2. a kind of method for removing sulfur dioxide gas according to claim 1, it is characterised in that: the sodium carbonate amount
It is 40-70 kilograms of slurries dosage per ton；The heavy metal chelating agent be thiocarbamates, 1-5 kilograms of clear liquid dosage per ton.
3. a kind of method for removing sulfur dioxide gas according to claim 1, it is characterised in that: further include to after desulfurization
The monitoring method that is monitored of sulfur dioxide in flue gas content, the monitoring method specifically: sampling air pump timing is from chimney
Quantitative flue gas is extracted, flue gas is sent into moisture trap from sampling air pump, and then No.1 solenoid valve and air pump enter air storage chamber,
Flue gas respectively enters No.1 sensor gas chamber or No. two sensor gas chambers by No. four solenoid valves or No. five solenoid valves, passes through gas chamber
The SO 2 sensor of interior setting calculates the content of sulfur dioxide in flue gas, obtains the dense of sulfur dioxide in flue gas
Degree.
4. a kind of method for removing sulfur dioxide gas according to claim 3, it is characterised in that: monitoring method is also wrapped
It including: when detecting sulfur dioxide concentration, opening No.1 solenoid valve, No. two solenoid valves are closed, and flue gas enters air storage chamber by air pump,
No. four solenoid valves are opened, No. five solenoid valves are closed, carry out concentration monitor in No.1 sensor gas chamber；After detecting a period of time, beat
No. two solenoid valves are opened, No.1 solenoid valve is closed, air enters air storage chamber and No.1 sensor gas chamber to sulfur dioxide by air pump
Sensor is cleaned；After cleaning, No. four solenoid valves are closed, close solenoid valve, open No.1 solenoid valve and No. five electromagnetism
Valve carries out concentration monitor using the indoor sensor of No. two sensor gas；After detecting a period of time, No. two solenoid valves are opened, are closed
No.1 solenoid valve is closed, air enters air storage chamber by air pump and sensor gas chamber cleans SO 2 sensor.
5. a kind of method for removing sulfur dioxide gas according to claim 1, it is characterised in that: the absorption tower includes
Slurries memory paragraph, super-thin spray absorber portion, conventional spray-absorption section, demisting section, high efficiency demister, Mechanical nozzle, pressure gauge,
Regulating valve, high pressure washing pump, filtered water tank, blender, slurry circulating pump, slurries pump, slurries stirred tank, blender, oxidation fan,
Atomizer strengthens spray thrower, smoke inlet, exhanst gas outlet；The slurries being stored in slurries stirred tank pass through pipe by slurries pump
Road is delivered in slurries memory paragraph, then under the action of slurries pump, is transported to super-thin spray and is absorbed and conventional spraying layer, slurry
Liquid is sprayed in super-thin spray absorber portion by atomizer, the atomized particles of generation and the smoke contacts inputted by smoke inlet,
Realize the desulfurization to sulfur-containing smoke gas；Slurries are sprayed in conventional spray-absorption section III by Mechanical nozzle, generate greater particle size
Droplet is contacted with sulfur-containing smoke gas, realizes secondary desulfuration；It settles, gathers under the slurries of desulfidation are completed the gravity the effects of
In slurries memory paragraph, the slurries of sedimentation in slurries stirred tank freshly prepd lime stone slurry under the action of blender
It is uniformly mixed, intermediate reaction object carries out oxidation reaction under the action of oxidation fan；Flue gas after first and second desulfurization
Part droplet is carried to continue up to demisting section, in the region of demisting section after high efficiency demister carries out demisting, by
Absorption tower is discharged in exhanst gas outlet；Clear water is delivered to demisting section by high pressure washing pump, regulating valve, pressure gauge by filtered water tank, adjusts
Section valve, pressure gauge are used to control the pressure and flow of clear water.
6. a kind of method for removing sulfur dioxide gas according to claim 5, it is characterised in that: the reinforcing spray thrower
For four layers of circular spray tube road being arranged concentrically, each nozzle surrounds the concentric circles equidistant with absorption tower tower wall, and atomizer is suitable
Absorption tower tower wall arranged tangential, the atomized particles jet stream ejected be circumferentially formed thereon the circle of contact of different-diameter；Vertical
Direction, atomized particles are because inertia moves downward, and because cigarette airflow function is stagnated, atomized particles are moved upwards with air-flow, super
Multiple elder generations upward turbulent region again downwards is formed in thin spray absorber section.
7. a kind of method for removing sulfur dioxide gas according to claim 6, it is characterised in that: in the atomizer
Portion is gas passage, the external contraction section that for slurry channels, the end of gas pipeline there is internal diameter to gradually decrease, slurry channels
End has the internal diameter contraction section gradually decreased and the expansion segment connecting with contraction section；The angle of slurry channels relative nozzle outlet
It is 45 °, the axis of gas passage is consistent with jet expansion direction, and slurry channels tangentially enter along outer nozzle wall, and gas is through gas
It is mixed after channel decompression speedup with internal mix chamber of the lime stone slurry of slurry channels outlet in front of jet expansion.
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| CN109932490A (en) * | 2019-03-20 | 2019-06-25 | 西安航空学院 | A kind of gas pretreatment device and gas-detecting device with back suction function |
| CN113899649A (en) * | 2021-09-23 | 2022-01-07 | 福建瓮福蓝天氟化工有限公司 | Device and method for determining carbonate content in sodium fluoride |
| WO2022032866A1 (en) * | 2020-08-14 | 2022-02-17 | 西安西热锅炉环保工程有限公司 | Desulfurization wastewater zero discharge treatment method and system suitable for multiple working conditions |
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| CN113899649B (en) * | 2021-09-23 | 2024-04-12 | 福建瓮福蓝天氟化工有限公司 | Device and method for measuring carbonate content in sodium fluoride |
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Effective date of registration: 20200529 Address after: 430060 No. 6 Fair Road, Wuchang District, Wuhan City, Hubei Province Applicant after: Zhang Wei Address before: 255400 Unit 301, Unit 2, Building No. 3, Niushan Road, Linzi District, Zibo City, Shandong Province Applicant before: Pang Bo |
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Application publication date: 20190122 |