CN106178819A - Activated coke desulfurization denitration by-product reforming unit and system for desulfuration and denitration and method - Google Patents
Activated coke desulfurization denitration by-product reforming unit and system for desulfuration and denitration and method Download PDFInfo
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- CN106178819A CN106178819A CN201610702191.5A CN201610702191A CN106178819A CN 106178819 A CN106178819 A CN 106178819A CN 201610702191 A CN201610702191 A CN 201610702191A CN 106178819 A CN106178819 A CN 106178819A
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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
- B01D53/02—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 by adsorption, e.g. preparative gas chromatography
-
- 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
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/81—Solid phase processes
-
- 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
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8637—Simultaneously removing sulfur oxides and nitrogen oxides
-
- 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
- B01D53/96—Regeneration, reactivation or recycling of reactants
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D5/00—Sulfates or sulfites of sodium, potassium or alkali metals in general
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D5/00—Sulfates or sulfites of sodium, potassium or alkali metals in general
- C01D5/14—Preparation of sulfites
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/20—Halogens or halogen compounds
- B01D2257/206—Organic halogen compounds
- B01D2257/2064—Chlorine
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/30—Sulfur compounds
- B01D2257/302—Sulfur oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/40—Nitrogen compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/60—Heavy metals or heavy metal compounds
- B01D2257/602—Mercury or mercury compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/40—Further details for adsorption processes and devices
- B01D2259/40083—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption
- B01D2259/40088—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by heating
Abstract
The invention belongs to environmental technology field, relate to cigarette (giving up) gas integrated purification technology, particularly relate to a kind of activated coke desulfurization denitration by-product reforming unit and system for desulfuration and denitration and method.The activated coke desulfurization denitration by-product reforming unit that the present invention provides, including absorption tower, joins alkali unit, middle product storage tank, neutralization still, vaporizer, dense batch can, centrifugal unit and drying device；Absorption tower is provided with inlet end, and inlet end is connected with the sulfur dioxide gas outfan parsed in activated coke desulfurization denitrating system；Join alkali unit, absorption tower, middle product storage tank, neutralize still, vaporizer, dense batch can, centrifugal unit are sequentially connected with drying device and connect.The present invention can improve the production added value of activated coke desulfurization denitrating system, increases economic efficiency, both economically and environmentally beneficial；Technique is simple, and compact in design, energy consumption is low, without waste water, without solid waste, non-secondary pollution, it is achieved that resource regeneration.
Description
Technical field
The invention belongs to environmental technology field, relate to cigarette (giving up) gas integrated purification technology, in particular to a kind of activity
Coke desulfurization denitration by-product reforming unit and system for desulfuration and denitration and method.
Background technology
Along with development and the quickening of process of industrialization of human social economy, Ferrous Metallurgy, non-ferrous metal metallurgy, coal-fired fire
Containing a large amount of SO in cigarette (giving up) gas of the field discharges such as electricity, chemical building material and burning boiler2、NOxEtc. harmful gas, cause serious
Atmospheric sulfer pollute and acid rain endanger.Although through the flue gas desulfurization construction in Eleventh Five-Year Plan period, the SO of China2、NOxDischarge capacity
Existing certain amplitude declines, but in " 12 " with in the longer time from now on, the SO of China2、NOxDeng emission reduction still
Heavier；In " 12 " period, country is to SO2And NOxCER be respectively 8% and 10%, become what China developed further
The binding indicator.Additionally, increasingly strict along with to environmental requirement, the noxious substance such as the hydrargyrum being discharged in air and two English is also
Starting to receive publicity and control, exploitation can combine removing SO2、NOx, the multiple pollutant such as hydrargyrum and two English, resource reclaims
Cigarette (giving up) gas purification techniques is significant.
Existing desulphurization denitration technology is broadly divided into wet method, semidry method and dry method, though wet method or semi-dry process compare into
Ripe, but its desulphurization and denitration effect does not reaches current ring mark requirement.What Wet technique was the more commonly used at present is to use calcium method to absorb
Flue gas, the semi-dry process i.e. soda of many employings Dual alkali and calcium lime powder absorb flue gas, and both approaches all can not carry out denitration
Process, the most also need to increase extra equipment ability denitration, and after its process, flue gas can be arranged with outside obvious steam, and be mingled with
CaO, NaOH and sulfide etc., relatively big on surrounding enviroment impact, secondary pollution can be caused, produce a large amount of waste water and solid waste needs two
Secondary process；And the requirement for anticorrosion height to equipment, also can cause the waste of the resources such as sulphuric acid.In various flue gases purifications, live
Property Jiao's flue gases purification there is its exclusive feature, there are high in environmental protection, degree of depth water saving, integrated purifying and resourcebility etc. excellent
Point；But there is the shortcomings such as flow process is complicated, energy consumption is higher in existing activated coke desulfurization denitrating system.
Additionally, by-product reforming unit in existing active coke desulphurizing denitrating system, mostly use and will this system resolve
In SO2Gas sequentially passes through the device such as converter, condenser and makes concentrated sulphuric acid.But, by the SO parsed2Prepared by gas
By-product concentrated sulphuric acid the most often there is problems in that owing to the condition of each department is different, the demand to sulphuric acid
Also it is not quite similar, therefore, sulphuric acid sales difficulty can be caused in certain areas, thus cause economic benefit low, and to environment also
Certain pollution can be caused.
Summary of the invention
It is a first object of the present invention to provide a kind of activated coke desulfurization denitration by-product reforming unit and method,
Use this device can produce the series high value added products such as sodium sulfite, sodium pyrosulfate, sodium dithionite, improve whole work
Property coke desulfurization denitrating system production added value, improve the utilization rate of resource, and then increase economic efficiency, not only economy but also ring
Protect.
It is a second object of the invention to provide a kind of activated coke desulfurization denitrating system and method, this system process
Simply, compact in design, energy consumption is low, and does not has waste water, do not has solid waste, do not has secondary pollution, it is achieved that resource regeneration.
For achieving the above object, the technical solution used in the present invention is:
A kind of activated coke desulfurization denitration by-product reforming unit, including absorption tower, join alkali unit, middle product storage tank,
Neutralize still, vaporizer, dense batch can, centrifugal unit and drying device；
Described absorption tower is provided with in inlet end, described inlet end and activated coke desulfurization denitrating system two parsed
Sulfur oxide gas output end is connected；
Described join alkali unit, absorption tower, middle product storage tank, neutralize still, vaporizer, dense batch can, centrifugal unit and be dried dress
Put to be sequentially connected and connect.
The by-product reforming unit that the present invention provides can produce sodium sulfite, sodium pyrosulfate, sodium dithionite (insurance
Powder) etc. series high value added product, the present invention will be described further to produce as a example by sodium sulfite, but be not limited to this.This
The whole by-product conversion process that sodium sulfite is produced in open-birth is simple, and by-product value of the product is high, and energy consumption is low, product high efficiency, warp
Help and environmental protection.
In the alternative of the present invention, between described inlet end and described sulfur dioxide gas outfan, it is provided with cooling
Pond, is used for reducing sulfur dioxide gas temperature；Described absorption tower is also connected with vacuum equipment, for discharging the sky in absorption tower
Gas.
For convenience of the alkali liquor of differently configured concentration, in the alternative of the present invention, described in join alkali unit and include being connected with each other
Alkali-prepared tank and alkali liquor storage tank, described alkali liquor storage tank is connected with described absorption tower, and between described alkali-prepared tank and alkali liquor storage tank
It is provided with the first delivery pump, between described alkali liquor storage tank and absorption tower, is provided with the second delivery pump.
For making sulfur dioxide gas and the absorption of sodium carbonate liquor react more fully, completely, the alternative of the present invention
In, described absorption tower includes being sequentially connected first grade absorption tower, two-level absorption tower, three grades of absorption towers and tail gas absorber, the institute connect
Stating the second delivery pump to be connected with tail gas absorber, described first grade absorption tower is connected with described middle product storage tank.
In the alternative of the present invention, described neutralization still includes in interconnective one-level and still and two grades of neutralization stills,
Described one-level is connected with described middle product storage tank and the second delivery pump respectively with still, described two grades of neutralization stills and sodium hydroxide
Delivery pump is connected.In the middle of wherein in one-level and in still, product sodium sulfite solution reacts with sodium carbonate liquor, two
In level neutralization still, sodium sulfite solution reacts with sodium hydroxide solution, and two steps neutralize reaction and sodium sulfite is reacted
More complete, improve reaction efficiency.
In the alternative of the present invention, drying tower that described drying device includes being sequentially connected with, cyclone dryer, whirlwind
Separator and vibrosieve, described centrifugal unit is connected with drying tower, described cyclone dryer with for absorption dehydration tail gas
Scrubbing tower is connected, and described vibrosieve is connected with finished-product packaging device.
The present invention also provides for a kind of activated coke desulfurization denitration by-product method for transformation, uses described in foregoing invention content
Activated coke desulfurization denitration by-product reforming unit carry out by-product conversion, comprise the steps:
(1) sulfur dioxide gas parsed in activated coke desulfurization denitrating system, enters absorption tower from inlet end,
With carry out absorbing reaction from joining the alkali liquor that alkali unit is delivered in absorption tower, the intermediate reaction liquid obtained is delivered to middle product storage
Tank；
(2) in the middle of, the intermediate reaction liquid in product storage tank is delivered to neutralize still, is neutralized reaction with alkali liquor in neutralizing still,
Obtain reaction solution；
(3) reaction solution obtained in step (2) is delivered to the feed liquid in dense batch can, in dense batch can after evaporator evaporation
Through centrifugal unit is centrifugal and drying device obtains finished product after drying.
In the alternative of the present invention, enter to the alkali liquor in described absorption tower be concentration be the carbonic acid of 20%～30%
Sodium solution, preferred concentration is 22%～24%.
Enter in described one-level and alkali liquor in still be concentration be the sodium carbonate liquor of 30%～40%, preferred concentration is
36%～38%.
Enter to the sodium hydroxide solution in described two grades of neutralization stills be concentration be the sodium carbonate liquor of 30%～40%, excellent
Selecting concentration is 32%～35%.
The present invention also provides for a kind of activated coke desulfurization denitrating system, including the activated coke cigarette described in foregoing invention content
Desulfurization denitration by-product reforming unit, also includes adsorption tower and Analytic Tower；
Described adsorption tower bottom is provided with smoke inlet, and top is provided with exhanst gas outlet, top and bottom and is respectively equipped with activated coke
Entrance and activated coke outlet；Described Analytic Tower top and bottom are respectively equipped with charging aperture and discharging opening；The activity of described adsorption tower
Burnt entrance is connected with the discharging opening of Analytic Tower, and the activated coke outlet of described adsorption tower is connected with the charging aperture of Analytic Tower；
Described Analytic Tower sidewall is provided with sulfur dioxide gas outfan, described sulfur dioxide gas outfan and described suction
The inlet end receiving tower is connected.
In the alternative of the present invention, described activated coke desulfurization denitrating system also includes ammonia system, dedusting system
System and electric control system, wherein, ammonia system is connected with adsorption tower, is used for improving desulfurization off sulfide effect；Dust pelletizing system sets
Being placed in the outside of adsorption tower, and connect with the smoke inlet of adsorption tower, described dust pelletizing system is electric cleaner or high temperature cloth bag
Cleaner unit；Electric control system includes electric motor loop, valve loop and electric power loop, electric control system and adsorption tower, parsing
Tower, ammonia system, dust pelletizing system are connected with by-product reforming unit.
In the alternative of the present invention, described activated coke desulfurization denitrating system also includes material-transporting system, thing
Material induction system includes the first conveyer belt and the second conveyer belt, wherein, the activated coke entrance of adsorption tower and the discharging opening of Analytic Tower
Being connected by the first conveyer belt, the first conveyer belt includes the conveyer belt with the first locking hopper and the first motor, the first locking
Hopper is arranged at bottom Analytic Tower；The activated coke outlet of adsorption tower is connected by the second conveyer belt with the charging aperture of Analytic Tower, institute
Stating the second conveyer belt and include the conveyer belt with the second locking hopper and the second motor, described second locking hopper is arranged at parsing
Tower bottom.
Further, also include adding the burnt batcher of fresh activity, storage bin for activated coke desulfurization denitrating system
And screening plant, batcher and storage bin are arranged on the first conveyer belt；Screening plant connects with the discharging opening of Analytic Tower, and
The activated coke entrance of the outlet and adsorption tower of sieving qualified particle diameter connects.
In the alternative of the present invention, described adsorption tower is adverse current bed structure.
In the alternative of the present invention, described Analytic Tower includes preheating zone, renewing zone and cooling zone the most successively,
The high temperature heat exchange blower fan turned on preheating zone and renewing zone, and the heat being connected with high temperature heat exchange blower fan it is provided with outside Analytic Tower
Source, thermal source is electric heater or air stove；It is provided with outside Analytic Tower and the low-temperature heat exchange blower fan of cooling zone conducting.
The present invention also provides for a kind of activated coke desulfurization method of denitration, uses the activated coke cigarette described in foregoing invention content
Desulfurization denitrating system carries out the process of flue gas desulfurization and denitrification, comprises the steps:
(1) flue gas desulfurization and denitrification: send into adsorption tower from smoke inlet by flue gas, activated coke relies on gravity in adsorption tower
Move from top to bottom, be fully contacted with flue gas, the SO in removing flue gas2、NOx, hydrargyrum and two English, the flue gas after purification passes through cigarette
Gas outlet drain；
(2) activated coke regeneration and circulation: activated coke activated coke outlet bottom adsorption tower enters Analytic Tower after falling,
Activated coke resolving absorption containing element sulphur and producing sulfur dioxide gas in Analytic Tower, the sulfur dioxide gas parsed is from suction
The inlet end receiving tower enters in absorption tower, carries out by-product conversion processing；Going out of activated coke after regeneration analytically tower bottom
Material mouth enters adsorption tower after falling, and circulates next time.
In the alternative of the present invention, the temperature of described flue gas is 90～190 DEG C.
The activated coke desulfurization method of denitration that the present invention provides, specifically includes following steps:
(1) flue gas desulfurization and denitrification: send into adsorption tower from smoke inlet by flue gas, activated coke relies on gravity in adsorption tower
Move from top to bottom, be fully contacted with flue gas, the SO in removing flue gas2、NOx, hydrargyrum and two English, the flue gas after purification passes through cigarette
Gas outlet drain；
(2) activated coke regeneration and circulation: activated coke activated coke outlet bottom adsorption tower enters Analytic Tower after falling,
Activated coke parsing absorption containing element sulphur in Analytic Tower, the discharging opening of the analytically tower bottom of the activated coke after regeneration falls
Rear entrance adsorption tower, circulates next time；
(3) by-product converts: the sulfur dioxide gas parsed in Analytic Tower, enters in by-product reforming unit, warp
Cross by-product reforming unit and produce sodium sulfite.
(4) by-product generates: the sulfur dioxide gas parsed enters to absorption tower to carry out absorbing reaction with alkali liquor, obtains
Middle product reactant liquor and alkali liquor in neutralizing still, be neutralized reaction, the reactant liquor obtained is through pervaporation, centrifugal and dried
Obtain finished product sodium sulfite.
Activated coke (or activated carbon) flue gas desulfurization and denitrification technology belongs to dry technique, has not water consumption, it is possible to take off simultaneously
Except SO2And NOxDeng pollutant, non-secondary pollution, it is a kind of applicable China's national situation, efficient and economic smoke pollution comprehensive control
Technology.Activated coke dry flue gas desulphurization denitration technology is with the technical performance of its brilliance and relatively low Financial cost, Ke Yiying
Be used in the purification of cigarette (giving up) gas, Sulphur ressource reclaims and cleaning production aspect.Therefore, activated coke (or activated carbon) dry method flue gas is selected
Relevant industries are carried out SO by desulphurization denitration technology2、NOxReduce discharging and recycling, for Economic Development Mode Conversion and development
Recycling economy, tool is of great significance.
The principle of active coke desulphurizing denitrating technique is based on SO2In absorption and the catalytic action on activated coke surface, in flue gas
SO2At a certain temperature, produce sulphuric acid with the oxygen in flue gas, steam generation chemical reaction to adsorb in activated coke hole.
The principle of activated coke denitrating technique is to utilize the catalysis characteristics of activated coke, uses selective catalytic reduction reaction method, in flue gas
Allocate a small amount of NH into3, promote NOxSelective catalytic reduction reaction is occurred to produce N2Directly discharge.Concrete reaction is as follows:
(1) physical absorption
SO2→SO2(SO2Absorption is in activated coke minute aperture)
(2) chemisorbed
SO2+O2+H2O→H2SO4
(3) to sulfate conversion (by NH3/SO2)
H2SO4+NH3←→NH4HSO4
NH4HSO4+NH3←→(NH4)2SO4
(4) denitration reaction:
SCR reacts
NO+NH3+1/2O2→N2+3/2H2O
Non-SCR (with the reducing substances direct reaction generated when departing from)
NO+C…Red→N2(C-Red: for the reducing substances on activated coke surface)
(5) regenerative response
H2SO4→H2O+SO3
NH4HSO4→H2O+SO3+NH3
(NH4)2SO4→H2O+SO3+2NH3
SO3+C-AC→SO2+1/2CO2
3SO3+2NH3→3SO2+3H2O+N2
In the present invention, activated coke desulfurization denitration by-product reforming unit can be sodium sulfite generating means, and sub-
The reaction equation that sodium sulfate produces is as follows:
The reaction equation absorbed:
First step course of reaction, Na2CO3+SO2=Na2SO3+CO2；
Second step course of reaction, Na2SO3+H2O+SO2=2NaHSO3；
The reaction equation neutralized:
First step course of reaction, Na2CO3+2NaHSO3=Na2SO3+CO2+H2O；
Second step course of reaction, NaOH+NaHSO3=Na2SO3+H2O。
Compared with prior art, the beneficial effects of the present invention is:
1, the activated coke desulfurization denitration by-product reforming unit of the present invention is connected with Analytic Tower, by Analytic Tower solution
The SO separated out2Gas generation sodium sulfite, owing to sodium sulfite is industrial broad-spectrum product, be widely used in medicine,
The industry such as rubber, printing and dyeing, has preferable market prospect.Specifically, medical industry can be used for producing chloroform, solapsone and benzene first
Aldehyde；Rubber industry can be used as coagulator；Printing and dyeing industry can be used as the antichlor after cotton bleaching, cotton cloth scouring agent；Leather industry
Can be used for leather to process, leather can be made soft, plentiful, tough and tensile, there is folding waterproof, anti-, the performance such as wear-resisting；Chemical industry can be used for
Produce hydroxycitronellal, oxammonium hydrochloride. etc.；Photosensitive industry can be used as developing agent etc.；Food industry is used as bleach, preservative, dredges
Pine agent, antioxidant, colour fixative and antistaling agent.
2, the activated coke desulfurization denitration by-product reforming unit that the present invention provides, technique is simple, energy consumption is low, not only may be used
To produce sodium sulfite, it is also possible to produce the series high value added product such as sodium pyrosulfate, sodium dithionite (sodium hydrosulfite), and then
Improve the production added value of whole activated coke desulfurization denitrating system, reduce production cost, improve the utilization rate of resource, and then
Increase economic efficiency, and non-wastewater discharge, both economically and environmentally beneficial.
3, the activated coke desulfurization denitrating system that the present invention provides, uses activated coke as adsorbent, and chimney is without substantially
Arrange outside steam, without solid waste, waste water and secondary pollution, and can realize removing SO simultaneously2、NOx, hydrargyrum, two English and the one of dust
Change, reduce operating cost；Technique is simple simultaneously, simple flow, is effectively increased the out of stock efficiency of desulfurization, and investment is supported, energy
Consume low.
4, the present invention uses activated coke to be adsorbent, and activated coke is that carbon back is granular, has high intensity, renewable, raw material is wide
The advantage such as general, to the pollutant SO in flue gas2、NOx, hydrargyrum or other heavy metals have the strongest adsorptivity；Desulfuration efficiency reaches 95%
Above, denitration efficiency reaches more than 60%, and the removal efficiency of hydrargyrum and two English all reaches more than 90%, and efficiency of dust collection reaches 75%
Above；And if SO in flue gas2Content concn improves, and the removal efficiency of activated coke will improve further, side-product income
Increasing further, operating cost is decreased obviously, and the leeway that raw material (sulphur coal, sulphide ore deposit etc.) selects simultaneously will carry out a step expansion
Greatly, so reduce production cost.
5, in the present invention, the flue gas after purification is discharged by chimney, adsorbs SO2After activated coke, in case of heating, its
The H adsorbed2SO4React with activated coke and be reduced to SO2, activated coke recovers absorption property simultaneously, recycles；Activated coke
Thermal regeneration reaction is equivalent to again activate activated coke, adsorbs and is catalyzed activity and not only will not reduce, and also has certain
The raising of degree.
6, without heating before the activated coke desulfurization denitrating system fume treatment that the present invention provides, overall energy consumption is low, nothing
Need technique water and wastewater treatment, thus non-secondary pollution；Equipment corrosion is low, and maintenance cost is low, and operation maintenance is convenient；Simultaneously
Technique is simple, compact in design, reasonable in design, and the discharge capacity of the major pollutants of discharge and concentration of emission have reached country the most
The requirement of maximum emission standard, and operating cost is low, energy-conserving and environment-protective, has good social benefit, economic benefit and environment
Benefit, should be widely promoted and apply.
For making the above-mentioned purpose of the present invention, feature and advantage to become apparent, preferred embodiment cited below particularly, and coordinate
Appended accompanying drawing, is described in detail below.
Accompanying drawing explanation
In order to be illustrated more clearly that the specific embodiment of the invention or technical scheme of the prior art, below will be to specifically
In embodiment or description of the prior art, the required accompanying drawing used is briefly described, it should be apparent that, in describing below
Accompanying drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not paying creative work
Put, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
The activated coke desulfurization denitration by-product reforming unit schematic diagram that Fig. 1 provides for the present invention；
The activated coke desulfurization denitrating system process chart that Fig. 2 provides for the present invention.
Reference:
1-adsorption tower；2-Analytic Tower；3-by-product reforming unit；
4-ammonia system；5-pressure fan；6-booster fan；
7-chimney；8-high temperature heat exchange blower fan；9-thermal source；
10-low-temperature heat exchange blower fan；11-the first conveyer belt；12-the second conveyer belt；
13-batcher；14-storage bin；15-screening plant；
101-allotter；102-discharger；
201-the first locking hopper；202-the second locking hopper；203-sulfur dioxide gas outfan；
31-absorption tower；32-joins alkali unit；Product storage tank in the middle of 33-；
In 34-and still；35-vaporizer；The dense batch can of 36-；
37-centrifugal unit；38-drying device；39-metering device；
310-packing device；
311-tail gas absorber；Tri-grades of absorption towers of 312-；313 two-level absorption towers；
314-first grade absorption tower；315-cooling bay；316-vacuum equipment；
321-the second delivery pump；322-alkali liquor storage tank；323-the first delivery pump；
324-alkali-prepared tank；
In 341-one-level and still；Bis-grades of neutralization stills of 342-；343-sodium hydroxide delivery pump；
351-cooler；
381-drying tower；382-cyclone dryer；383-cyclone separator；
384-vibrosieve；385-scrubbing tower.
Detailed description of the invention
For making the purpose of the embodiment of the present invention, technical scheme and advantage clearer, below in conjunction with the embodiment of the present invention
Middle accompanying drawing, is clearly and completely described the technical scheme in the embodiment of the present invention, it is clear that described embodiment is only
It is a part of embodiment of the present invention rather than whole embodiments.Generally real with the present invention illustrated described in accompanying drawing herein
The assembly executing example can be arranged with various different configurations and design.Therefore, below to the present invention's provided in the accompanying drawings
The detailed description of embodiment is not intended to limit the scope of claimed invention, but is merely representative of the selected reality of the present invention
Execute example.Based on embodiments of the invention, the institute that those skilled in the art are obtained on the premise of not making creative work
There are other embodiments, broadly fall into the scope of protection of the invention.
Below in conjunction with embodiment and detailed description of the invention, the present invention will be further described in detail.
Embodiment 1
The activated coke desulfurization denitration by-product reforming unit schematic diagram that Fig. 1 provides for the present invention, as it is shown in figure 1, one
Plant activated coke desulfurization denitration by-product reforming unit, including absorption tower 31, join alkali unit 32, middle product storage tank 33, neutralization
Still 34, vaporizer 35, dense batch can 36, centrifugal unit 37 and drying device 38；Absorption tower 31 is provided with inlet end, inlet end and work
The sulfur dioxide gas outfan 203 parsed in property coke desulfurization denitrating system is connected；Join alkali unit 32, absorption tower
31, middle product storage tank 33, neutralization still 34, vaporizer 35, dense batch can 36, centrifugal unit 37 are sequentially connected with drying device 38 and connect.
Wherein, join alkali unit 32 and prepare unit for sodium carbonate liquor, join alkali unit 32 and include interconnective alkali-prepared tank 324
With alkali liquor storage tank 322, alkali liquor storage tank 322 is connected with absorption tower 31, and is provided with between alkali-prepared tank 324 and alkali liquor storage tank 322
One delivery pump 323, is provided with the second delivery pump 321 between alkali liquor storage tank 322 and absorption tower 31.
Absorption tower 31 includes being sequentially connected first grade absorption tower 314, two-level absorption tower 313, three grades of absorption towers 312 and the tails connect
Gas absorption tower 311, the second delivery pump 321 is connected with tail gas absorber 311, for conveying preparation in tail gas absorber 311
Good sodium carbonate liquor；First grade absorption tower 314 is connected with middle product storage tank 33, through three grades of sulfurous obtained after absorbing reaction
Acid hydrogen sodium solution is delivered in middle product storage tank 33, so that absorb reaction more fully, completely.
Neutralize still 34 and include in interconnective one-level and still 341 and two grades of neutralization stills 342, in one-level with still 341 respectively
Being connected with middle product storage tank 33 and the second delivery pump 321, two grades of neutralization stills 342 are connected with sodium hydroxide delivery pump 343；Two
Level neutralization still 342 is also connected with vaporizer 35, and vaporizer 35 is connected with condenser 351.Wherein in one-level and in still 341
Middle product sodium sulfite solution reacts with sodium carbonate liquor, sodium sulfite solution and hydrogen in two grades of neutralization stills 342
Sodium hydroxide solution reacts, and two steps neutralize reaction and make sodium sulfite reaction more complete, improve reaction efficiency.
Drying device 38 includes drying tower 381, cyclone dryer 382, cyclone separator 383 and the vibrosieve being sequentially connected with
384, centrifugal unit 37 is connected with drying tower 381, cyclone dryer 382 and scrubbing tower 385 phase for absorption dehydration tail gas
Connecting, vibrosieve 384 is connected with finished-product packaging device 310, also sets up between its vibrosieve 384 and finished-product packaging device 310
There is metering device 39.
In the present embodiment, between inlet end and sulfur dioxide gas outfan 203, it is provided with cooling bay 315, is used for reducing
Sulfur dioxide gas temperature；Absorption tower 31 is also connected with vacuum equipment 316, for discharging the air in absorption tower 31.
Use above activated coke desulfurization denitration by-product reforming unit to carry out by-product conversion, specifically include following step
Rapid:
(1) (in the present embodiment, sodium carbonate liquor concentration is to configure certain density sodium carbonate liquor in alkali-prepared tank 324
22%～24%), it is sent to alkali liquor storage tank 322 through the first delivery pump 323, is then sent to tail gas absorber through the second delivery pump 321
311, three grades of absorption towers 312, two-level absorption tower 313 and first grade absorption tower 314, at three grades of absorption towers 312, two-level absorption tower 313
With in first grade absorption tower 314, controlling temperature and acidity, sodium carbonate liquor resolves with in activated coke desulfurization denitrating system
The sulfur dioxide gas gone out occurs to absorb reaction.Wherein, the absorbing liquid of tail gas absorber 311 delivers to three grades of absorption towers 312, three grades
The absorbing liquid on absorption tower 312 delivers to two-level absorption tower 313, and the absorbing liquid of two-level absorption tower 313 delivers to first grade absorption tower 314,
First grade absorption tower 314 obtains qualified sodium sulfite solution (pH value 4-5, concentration 450-500g/L), qualified sulfurous acid
Hydrogen sodium solution delivers to middle product storage tank 33.
(2) in the middle of, the sodium sulfite solution in product storage tank 33 is delivered in one-level and still 341, and through the second delivery pump 321
Deliver in one-level and the sodium carbonate liquor (concentration is 36%～38%) of still 341 reacts, enter two grades when PH reaches 5-6
Neutralize still 342, with deliver to through sodium hydroxide delivery pump 343 two grades of neutralization stills 342 sodium hydroxide solution (concentration be 32%～
35%) reacting, generate sodium sulfite neutralizer, qualified sodium sulfite neutralizer delivers to neutralizer storage tank or vaporizer
35。
(3) sodium sulfite neutralizer obtains suspension after vaporizer 35 evaporates, and this suspension is delivered to dense through delivery pump
Batch can 36, the feed liquid in dense batch can 36 is sent to centrifugal unit 37 again and is centrifuged, through the centrifugal sodium sulfite solid that obtains, and from
The mother solution of the heart then enters mother liquor tank.
(4) the sodium sulfite solid that unit 37 obtains by centrifugation is delivered to drying device 38 and is dried, and is dried tail gas and leads to
Crossing qualified discharge after scrubbing tower 385 absorbs, tail gas absorption liquid returns to recycle in alkali-prepared tank 324 again, the Asia that drying obtains
Solid sodium sulfate obtains sodium sulfite finished product after metering, packaging.
Embodiment 2
The activated coke desulfurization denitrating system process chart that Fig. 2 provides for the present invention, as in figure 2 it is shown, the present embodiment
A kind of activated coke desulfurization denitrating system is provided, converts dress including the activated coke desulfurization denitration by-product in embodiment 1
Put 3, also include adsorption tower 1 and Analytic Tower 2；Adsorption tower 1 lower sides is provided with smoke inlet, and upper portion side wall is provided with flue gas and goes out
Mouthful, top and bottom are respectively equipped with activated coke entrance and activated coke outlet, and adsorption tower 1 is connected with ammonia system 4；Analytic Tower 2
Top and bottom are respectively equipped with charging aperture and discharging opening, and the activated coke entrance of adsorption tower 1 is connected with the discharging opening of Analytic Tower 2, inhale
The activated coke outlet of attached tower 1 is connected with the charging aperture of Analytic Tower 2；Analytic Tower 2 sidewall is provided with air vent, air vent and by-product
Reforming unit 3 connects.Analytic Tower 2 sidewall is provided with sulfur dioxide gas outfan 203, sulfur dioxide gas outfan 203 with
The inlet end on absorption tower 31 is connected.
In the present embodiment, smoke inlet is connected with the pressure fan 5 for supplied flue gases by pipeline, and its connecting line sets
There is booster fan 6；Exhanst gas outlet is connected with chimney 7, and its connecting line is provided with the air door for controlling flue gas flow.Adsorption tower
1 is adverse current bed structure, and adsorption tower 1 top is provided with the feed bin connected with activated coke entrance and allotter 101, and bottom is provided with and activity
The discharger 102 of burnt outlet.
Analytic Tower 2 includes preheating zone, renewing zone and cooling zone, being provided with and preheating zone outside Analytic Tower 2 the most successively
With the high temperature heat exchange blower fan 8 of renewing zone conducting, and the thermal source 9 being connected with high temperature heat exchange blower fan 8, thermal source 9 be electric heater or
Air stove；It is provided with outside Analytic Tower 2 and the low-temperature heat exchange blower fan 10 of cooling zone conducting.
The activated coke entrance of adsorption tower 1 is connected by the first conveyer belt 11 with the discharging opening of Analytic Tower 2, the first conveyer belt 11
Including with the conveyer belt of the first locking hopper 201 and the first motor, the first locking hopper 201 is arranged at bottom Analytic Tower 2；Inhale
The activated coke outlet of attached tower 1 is passed through the second conveyer belt 12 with the charging aperture of Analytic Tower 2 and is connected, and the second conveyer belt 12 includes with the
The conveyer belt of two locking hoppers 202 and the second motor, the second locking hopper 202 is arranged at bottom Analytic Tower 2.
The activated coke desulfurization denitrating system that the present embodiment provides also includes adding fresh activity for system for desulfuration and denitration
Burnt batcher 13, storage bin 14 and screening plant 15, batcher 13 and storage bin 14 are arranged on the first conveyer belt 11；Sieve
Separating device 15 connects with the discharging opening of Analytic Tower 2, and the activated coke entrance of the outlet and adsorption tower 1 sieving qualified particle diameter connects.
Further, ammonia system 4, dust pelletizing system and electric control system, wherein, ammonia system 4 and absorption are also included
Tower 1 is connected, and dust pelletizing system is arranged at the outside of adsorption tower 1, and connects with the smoke inlet of adsorption tower 1, and dust pelletizing system is electricity
Cleaner unit or high temperature cloth bag dust collector；Electric control system includes electric motor loop, valve loop and electric power loop, electrical control
System is connected with adsorption tower 1, Analytic Tower 2, by-product reforming unit 3, ammonia system 4 and dust pelletizing system.
Activated coke desulfurization method of denitration in the present embodiment, specifically includes following steps:
(1) flue gas desulfurization and denitrification: first passed through dust pelletizing system before flue gas enters adsorption tower 1 and carry out dedusting, then distinguish
By pressure fan 5 and booster fan 6, flue gas is sent in adsorption tower 1, ammonia is sent into absorption by ammonia conveyer device simultaneously
In tower 1.Activated coke enters adsorption tower 1 from the activated coke entrance of adsorption tower 1, activated coke rely on gravity in adsorption tower 1 from and
Lower movement, is fully contacted with flue gas and ammonia, the SO in removing flue gas2、NOx, hydrargyrum and two English, the flue gas after purification passes through cigarette
Gas outlet is discharged from chimney 7；
(2) activated coke regeneration and circulation: activated coke falls behind by the second conveying the activated coke outlet bottom adsorption tower 1
Band 12 entrance Analytic Tower 2, in Analytic Tower 2, activated coke resolves and produces sulfur dioxide gas by adsorb containing element sulphur, resolves
The sulfur dioxide gas the gone out inlet end from absorption tower 31 enters into absorption tower 31, carries out by-product conversion processing, after regeneration
Activated coke fallen by the discharging opening bottom the first conveyer belt 11 analytically tower 2 after enter adsorption tower 1, follow next time
Ring.
In the alternative of the present invention, the temperature of flue gas is 90～190 DEG C.
According to above-mentioned provided activated coke desulfurization denitrating system and method, carry out fume treatment, the phase after process
Pass data are as shown in table 1.
Table 1 activated coke desulfurization denitration key property parameter
| Project | Unit | Data |
| SO2Removal efficiency | % | 98 |
| NOxRemoval efficiency | % | 60 |
| Fluoride emission | mg/Nm3 | <4 |
| Two English discharges | ng/Nm3 | <2 |
| Dust contained flue gas concentration | mg/Nm3 | <20 |
Comparative example
Use the activated coke desulfurization denitration technology that existing semi-dry desulphurization+SCR denitration technology provides with the present invention
Contrasting, and carry out economic technique analysis, result is as shown in table 2.
Table 2 activated coke desulfurization denitration technology and the contrast of semi-dry desulphurization+SCR denitration technology
According to table 2 it can be seen that activated coke desulfurization denitration technology tool compared with semi-dry desulphurization+SCR denitration technology
Have obvious advantage, its substantially without solid waste, the generation of waste water, non-secondary pollution, and chimney 7 without outside obvious steam arrange,
Annual operating cost is low, and the Main By product sodium sulfite of generation has higher value, is effective recycling economy.With
Time, activated coke desulfurization denitration technology uses activated coke to be adsorbent, can carry out denitration, other two kinds of equal nothings of technology simultaneously
Method completes, and needs newly added equipment, increases a large number of investment and carries out denitration process.
It is last it is noted that the detailed description of the invention of above example, the only present invention, in order to the skill of the present invention to be described
Art scheme, is not intended to limit, and protection scope of the present invention is not limited thereto, although entering the present invention with reference to previous embodiment
Go detailed description, it will be understood by those within the art that: any those familiar with the art is at this
In the technical scope that invention discloses, the technical scheme described in previous embodiment still can be modified or can think easily by it
To change, or wherein portion of techniques feature is carried out equivalent；And these are revised, change or replace, do not make corresponding
The essence of technical scheme departs from the spirit and scope of embodiment of the present invention technical scheme.All should contain in protection scope of the present invention
Within.Therefore, protection scope of the present invention should be as the criterion with scope of the claims.
Claims (10)
1. an activated coke desulfurization denitration by-product reforming unit, it is characterised in that include absorption tower, join alkali unit, in
Between product storage tank, neutralize still, vaporizer, dense batch can, centrifugal unit and drying device；
Described absorption tower is provided with in inlet end, described inlet end and activated coke desulfurization denitrating system the titanium dioxide parsed
Sulfur gas output end is connected；
Described join alkali unit, absorption tower, middle product storage tank, neutralize still, vaporizer, dense batch can, centrifugal unit depend on drying device
Secondary it is connected.
Activated coke desulfurization denitration by-product reforming unit the most according to claim 1, it is characterised in that described air inlet
It is provided with cooling bay between end and described sulfur dioxide gas outfan, is used for reducing sulfur dioxide gas temperature；Described absorption
Tower is also connected with vacuum equipment, for discharging the air in absorption tower.
Activated coke desulfurization denitration by-product reforming unit the most according to claim 1, it is characterised in that described in join alkali
Unit includes that interconnective alkali-prepared tank and alkali liquor storage tank, described alkali liquor storage tank are connected with described absorption tower, and described in join alkali
It is provided with the first delivery pump between tank and alkali liquor storage tank, between described alkali liquor storage tank and absorption tower, is provided with the second delivery pump.
Activated coke desulfurization denitration by-product reforming unit the most according to claim 3, it is characterised in that described absorption
Tower includes being sequentially connected first grade absorption tower, two-level absorption tower, three grades of absorption towers and the tail gas absorber connect, described second delivery pump
Being connected with tail gas absorber, described first grade absorption tower is connected with described middle product storage tank.
Activated coke desulfurization denitration by-product reforming unit the most according to claim 3, it is characterised in that described neutralization
Still includes in interconnective one-level and still and two grades of neutralization stills, in described one-level and still respectively with described middle product storage tank and the
Two delivery pumps are connected, and described two grades of neutralization stills are connected with sodium hydroxide delivery pump.
Activated coke desulfurization denitration by-product reforming unit the most according to claim 1, it is characterised in that described dry
Device includes drying tower, cyclone dryer, cyclone separator and the vibrosieve being sequentially connected with, described centrifugal unit and drying tower phase
Connecting, described cyclone dryer is connected with the scrubbing tower for absorption dehydration tail gas, described vibrosieve and finished-product packaging device
It is connected.
7. an activated coke desulfurization denitration by-product method for transformation, it is characterised in that use any one of claim 1～6
Described activated coke desulfurization denitration by-product reforming unit carries out by-product conversion, comprises the steps:
(1) sulfur dioxide gas parsed in activated coke desulfurization denitrating system, from inlet end enter absorption tower, with from
Joining the alkali liquor that alkali unit is delivered in absorption tower to carry out absorbing reaction, the intermediate reaction liquid obtained is delivered to middle product storage tank；
(2) in the middle of, the intermediate reaction liquid in product storage tank is delivered to neutralize still, is neutralized reaction with alkali liquor, obtains in neutralizing still
Reaction solution；
(3) reaction solution obtained in step (2) is delivered in dense batch can after evaporator evaporation, and the feed liquid in dense batch can is passed through
Centrifugal unit is centrifugal and drying device obtains finished product after drying.
Activated coke desulfurization denitration by-product method for transformation the most according to claim 7, it is characterised in that enter to institute
State the alkali liquor in absorption tower be concentration be the sodium carbonate liquor of 20%～30%, entering to the alkali liquor in described neutralization still is concentration
It it is the sodium carbonate liquor of 30%～40%.
9. an activated coke desulfurization denitrating system, takes off including the activated coke desulfurization described in any one of claim 1～6
Nitre by-product reforming unit, it is characterised in that also include adsorption tower and Analytic Tower；
Described adsorption tower bottom is provided with smoke inlet, and top is provided with exhanst gas outlet, top and bottom and is respectively equipped with activated coke entrance
Export with activated coke；Described Analytic Tower top and bottom are respectively equipped with charging aperture and discharging opening；The activated coke of described adsorption tower enters
Mouth is connected with the discharging opening of Analytic Tower, and the activated coke outlet of described adsorption tower is connected with the charging aperture of Analytic Tower；
Described Analytic Tower sidewall is provided with sulfur dioxide gas outfan, described sulfur dioxide gas outfan and described absorption tower
Inlet end be connected.
10. an activated coke desulfurization method of denitration, it is characterised in that use the activated coke flue gas described in claim 9 to take off
Sulfur denitrating system carries out the process of flue gas desulfurization and denitrification, comprises the steps:
(1) flue gas desulfurization and denitrification: flue gas is sent into adsorption tower from smoke inlet, activated coke rely on gravity in adsorption tower from
And lower movement, it is fully contacted with flue gas, the SO in removing flue gas2、NOx, hydrargyrum and two English, the flue gas after purification is gone out by flue gas
Mouth discharge；
(2) activated coke regeneration and circulation: activated coke activated coke outlet bottom adsorption tower enters Analytic Tower after falling, and is resolving
Activated coke resolving absorption containing element sulphur and producing sulfur dioxide gas in tower, the sulfur dioxide gas parsed is from absorption tower
Inlet end enter in absorption tower, carry out by-product conversion processing；The discharging opening of the analytically tower bottom of the activated coke after regeneration
Enter adsorption tower behind whereabouts, circulate next time.
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| CN111170339A (en) * | 2020-01-21 | 2020-05-19 | 北京中航泰达环保科技股份有限公司 | System and method for preparing sodium sulfite by recycling active coke desulfurization rich gas |
| CN111170339B (en) * | 2020-01-21 | 2024-03-01 | 北京中航泰达环保科技股份有限公司 | System and method for preparing sodium sulfite by recycling active coke desulfurization rich gas |
| CN111153418B (en) * | 2020-01-21 | 2024-03-01 | 北京中航泰达环保科技股份有限公司 | System and method for preparing multiple salts by recycling active coke regenerated gas |
| CN116688716A (en) * | 2023-08-01 | 2023-09-05 | 山东鹏达生态科技股份有限公司 | Flue gas desulfurization process in petroleum refining process |
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Application publication date: 20161207 |