CN105645113B - A kind of sodium acid carbonate collection is defeated and injection method - Google Patents
A kind of sodium acid carbonate collection is defeated and injection method Download PDFInfo
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- CN105645113B CN105645113B CN201610055919.XA CN201610055919A CN105645113B CN 105645113 B CN105645113 B CN 105645113B CN 201610055919 A CN201610055919 A CN 201610055919A CN 105645113 B CN105645113 B CN 105645113B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/34—Details
- B65G53/40—Feeding or discharging devices
- B65G53/48—Screws or like rotary conveyors
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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
- B01D53/60—Simultaneously removing sulfur oxides and nitrogen oxides
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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
- B01D53/64—Heavy metals or compounds thereof, e.g. mercury
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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
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/81—Solid phase processes
- B01D53/83—Solid phase processes with moving reactants
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/18—Adding fluid, other than for crushing or disintegrating by fluid energy
- B02C23/20—Adding fluid, other than for crushing or disintegrating by fluid energy after crushing or disintegrating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/34—Details
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/30—Alkali metal compounds
- B01D2251/304—Alkali metal compounds of sodium
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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
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Abstract
The invention discloses a kind of sodium acid carbonate collection is defeated and injection method, including：Step 1：Coarse powder particles, step 2 is made through coal pulverizer in sodium acid carbonate：Fine powder is separated, particle diameter material up to standard enters fine powder screw conveyor, and fine powder not up to standard continues back at superfine powder flour mill milling；Step 3：Particle diameter material up to standard is sent to fine powder pulsed jet cloth filter through fine powder screw conveyor in step 2 is separated, and the ultra-fine grain isolated is delivered to warehouse, and gas drains into air through pulse bag air-introduced machine；Step 4：Superfine powder in step 3 in warehouse claims through intermediate bin into double helix measuring, and accurate measurement, step 5 are carried out to powder flow：Powder in step 4 by metering is introduced into pipeline distributor and sprays into powder in flue through injector, and the mixing effect of cigarette increase flue gas and powder, to remove the pollutant in flue gas, realizes the target of energy-saving and emission-reduction.
Description
Technical field
The present invention relates to a kind of sodium acid carbonate collection is defeated and injection method, desulphurization and denitration process is completed, can effectively remove flue gas
In nitrogen oxides, oxysulfide and other sour gas so that purified flue gas qualified discharge.
Background technology
In recent years, due to the worsening of Domestic Environment situation, energy-conserving and emission-cutting technology is increasingly subject to national attention, and takes
Obtained and flourished.NaHCO3 absorption techniqueses are a kind of higher desulfurization and denitrification integral technologies of efficiency, and the technology one step of energy is complete
Into desulphurization and denitration process, belong to integration desulfurization denitration flue gas purifying technique.The technique has the pollutant of control discharge very high
Removal rate SO2 (>99.5%), SO3 (>99.5%), NOx (>98%), Mercury mercury (>98%), at the same remove H2SO4,
The sour gas such as HCl and HF.Early in the seventies, which is just found and is considered as best kitchen air contaminant control skill
Art, but excessively high operating cost causes the application of old-fashioned technology to be restricted.In recent years, with air contaminant treatment skill
The continuous development of art, the technology solve the problems, such as recycling for NaHCO3, become the technique with tremendous expansion potentiality
System, but the technology needs to solve some technical bottlenecks at the same time, so that the performance and economy of the technology are optimal.
One of core technology as the process system, the powder processed of NaHCO3, collect defeated and spraying technique in flue gas
The place to go efficiency of pollutant has decisive influence.NaHCO3 has easy deliquescence, heated easily decomposition etc. characteristic, sodium bicarbonate powder
Fineness have a significant impact for improving with the contact area of flue gas pollutant, so as to improve pollutant removing efficiency, how
It is to restrict the bottleneck of the technology to solve the fineness of powder of sodium bicarbonate powder and the contradiction of thermal decomposition in pulverizing process；It is meanwhile right
In manufactured sodium bicarbonate powder, how to ensure that its is conveyed at a distance, avoid blocking and deliquescence for occurring in course of conveying etc.
Problem, becomes the another question of the technology；At the same time, sodium bicarbonate particle and flue gas uniformly mix and what is needed connects
Touching the reaction time becomes the guarantee of pollutant removing efficiency.
In recent years, limited by the high operation cost of NaHCO3 absorption techniqueses, it is domestic almost without corresponding commercial Application,
Related NaHCO3 injections, the research of Mixing Technology report are less, can be purchased without ripe industrial products, it is necessary to carry out related
Equipment development, realizes technology closed loop.
The content of the invention
Present invention solves the technical problem that it is：Flue gas flow is big, and powder jetting amount is relatively small.Meet in large space
Thin powder is uniformly distributed, and technical difficulty is larger, is designed and be have developed that a kind of sodium acid carbonate collection is defeated and injection method, will
NaHCO3 powder is uniformly mixed with flue gas, increases the mixing effect of flue gas and powder, to remove the pollutant in flue gas, realizes section
The target of energy emission reduction.
To reach above-mentioned purpose, technical scheme is as follows：
A kind of sodium acid carbonate collection is defeated and injection method, it is characterised in that comprises the following steps：
Step 1：Coarse powder particles are made through coal pulverizer in sodium acid carbonate, and coarse powder particles are separated through coarse powder cyclone separator,
The coarse granule isolated enters coarse powder strength screw conveyor, and gas and ultra-fine grain enter bag filter, arranged through air-introduced machine
Into air；
Step 2：Coarse granule is sent into superfine mill by screw conveyor through oscillating feeder in step 1, by coarse granule
Superfine powder is worn into, into fine powder cyclone separator；Fine powder is separated, particle diameter material up to standard enters fine powder screw conveyor, no
Fine powder up to standard continues back at superfine powder flour mill milling；
Step 3：In step 2 particle diameter material up to standard through fine powder screw conveyor send to fine powder pulsed jet cloth filter into
Row separation, the ultra-fine grain isolated are delivered to warehouse, and gas drains into air through pulse bag air-introduced machine；
Step 4：Superfine powder in step 3 in warehouse claims through intermediate bin into double helix measuring, and powder flow is carried out
Accurate measurement, the powder after metering enter next step spraying system；
Step 5：If the powder in step 4 by metering is introduced into pipeline distributor and powder is divided into carried interest, through injection
Device is sprayed into flue, diffusion disturbed flow pipe is set in flue, powder mixes more uniform under the action of diffusion disturbed flow pipe with flue gas.
In a preferred embodiment of the invention, coarse powder particles particle diameter is 150um~200um in the step 1.
In a preferred embodiment of the invention, in the step 2 superfine powder that superfine mill is worn into grain up to standard
Footpath is 30um~40um.
In a preferred embodiment of the invention, powder is divided into four strands by the pipeline distributor.
Through the above technical solutions, the beneficial effects of the invention are as follows：
1st, using the gas-solid injector of diffusion flow-disturbing tubular type, flue gas is divided into two parts after diffusion disturbed flow pipe water conservancy diversion, one
Lease making crosses diffusion disturbed flow pipe and realizes that the contraction of air-flow accelerates；Another part, which flows through, realizes that the diffusion of air-flow subtracts in diffusion disturbed flow pipe
Speed.Two strands of flue gases have larger current difference, and effective blending is formed in diffusion disturbed flow pipe downstream.
2nd, powder is injected in outside in diffusion disturbed flow pipe respectively, and the uniform of powder is realized with the convection current blending of main flume
Distribution；
3rd, sprayed by the powder circle of contact, the function influence such as reflux of main flume, mean residence time of the powder in flue
Extend.
4th, optimize the flow field of injector, reduce the resistance of injector；
5th, system automation degree is high, employs the design side of key parameter linkage adjusting and fault alarm interlocking action
Method, improves reliability and safety；
6th, possesses the effect of integrated desulfurization, denitration and removing heavy metal.
7th, the fine powder rate of sodium acid carbonate is improved, ensure that fineness of powder, solves sodium bicarbonate powder in Ultrafine Grinding
The problem of local pyro lysis, ensure that fine powder rate.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is attached drawing needed in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, without creative efforts, can be with
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is the system process figure of the present invention.
Fig. 2 is the schematic diagram of the powder metering device of the present invention.
Fig. 3 a are the schematic diagrames of the injector of the present invention.
Fig. 3 b are the left views of the injector of the present invention.
Fig. 4 a are the diffusion disturbed flow pipe schematic diagrames of the present invention.
Fig. 4 b are the left views of the diffusion disturbed flow pipe of the present invention.
Fig. 5 is the pipeline distributor schematic diagram of the present invention.
Embodiment
In order to make the technical means, the creative features, the aims and the efficiencies achieved by the present invention easy to understand, tie below
Conjunction is specifically illustrating, and the present invention is further explained.
Referring to Figures 1 and 2, a kind of sodium acid carbonate collection is defeated and injection method, including：One powder transfer device, the powder
Conveying device includes connecting by pipeline thick to the separated coarse powder cyclone separator 1 of coarse powder particles, the coarse powder cyclone separator
Powder strength screw conveyor 2, the coarse powder strength screw conveyor 2 are connected by oscillating feeder 3 with superfine mill 4, institute
State superfine mill 3 and coarse granule is worn into superfine powder；Further include the fine powder cyclonic separation being connected with the output terminal of superfine mill 4
Device, the superfine powder up to standard worn into enter fine powder screw conveyor；The ultra-fine grain that the fine powder screw conveyor 4 will be isolated
It is delivered to the warehouse being connected with it by pipeline；Material particular diameter into scratch system is 150um~200um, in coal pulverizer
After wearing into coarse powder particles, separated into coarse powder cyclone separator 1, the thick solid particle of sedimentation is through coarse powder strength helical feed
Machine 2 and oscillating feeder 3 enter superfine mill 4.
And gas and fine grained are further separated through coarse powder pulsed jet cloth filter 5, gas is drained into through coarse powder air-introduced machine 6
Air, fine grained enter superfine mill together with the thick solid that upper level is isolated.Underproof material, which is fallen after rise, to be refaced, qualified
Material then enter fine powder cyclone separator 7 with air-flow, dust falls, and is discharged by the discharge valve of bottom.
Fraction fine dust then enters fine powder pulsed jet cloth filter 8 with air-flow, and is adhered to filter bag surface.Pulse valve control
High pressure draught processed adheres to dust thereon then because the unexpected shake of filter bag is fallen, the fine powder of bottom from moment injection inside filter bag
Screw conveyor 9 is then sent the material collected at two to the warehouse 10 of NaHCO3 fine powders, the material particular diameter after scratch system is milled
It is changed into about 400 mesh of 30um~40um.
The one powder metering device being connected with the warehouse, the powder metering device accurately count powder flow
Amount, the powder after metering enter powder jetting device；
And a powder jetting device, the powder jetting device include the pipeline distributor being connected with powder metering device
15, if powder enters injector 16 after pipeline distributor is divided into carried interest, the injector is arranged on the wall of flue,
Further include a diffusion disturbed flow pipe 17 being arranged in the middle part of flue, the powder air-flow that injector sprays is flowed through after diffusion disturbed flow pipe with coming
Stream flue gas is efficiently mixed, purifying smoke.
Further, the upper end connection bag filter 5 of coarse powder cyclone separator, the output pipe of the bag filter
On be provided with air-introduced machine, provide kinetic energy by air-introduced machine, gas and ultra-fine grain drained into air.
Warehouse discharge port will set manual isolation valve, inlet valve, material feeding pump, vacuum pressure relief valve.Orlop is equipped with gasification
Device 11 and heater 12, heating air is conveyed by gasification installation 11 into warehouse.The outlet of the warehouse 10 of NaHCO3 fine powders
Connection intermediate bin 13 and fine powder double helix measuring claim 14 accurately to control powder flow.
In addition, powder metering device includes being located at top speed governing feeding serew component and the constant speed metering screw positioned at lower part
Component；The speed governing feeding serew component includes a feeding serew device 100, and nesting is arranged in feeding serew device 100
Feeding serew driving device 200, the feeding serew device side are also associated with feed inlet 110；The constant speed metering screw component
The metering screw driving device 400 in metering screw device, the meter are arranged at including a metering screw device 300, and a nesting
Amount spiral organ side is provided with discharge port 310.Wherein speed governing feeding serew component is further included to surround and is arranged in feeding serew device
Metering reamer 500, it is described metering reamer on load sensor is installed.Wherein above-mentioned component is mounted on installation pedestal 600
On.
Material is transported to the metering reamer connected below by feed inlet through screw conveyor, is installed on above metering reamer
Load sensor detects the weight of material and produces is sent into controller with the voltage signal for being proportional to load of weighing, and default
Reamer speed draws instantaneous delivery and cumulative weight value after computing together.Instantaneous delivery is with specified rate compared with, and deviation is through PI numbers
Output regulation signal after regulation computing, by the rotating speed of speed regulating control instrument control speed regulating motor, to reach the mesh of dosing
's.
With reference to shown in Fig. 3, Fig. 4 and Fig. 5, further, powder jetting device, including pipeline distributor, powder pass through
If pipeline distributor enters injector after being divided into carried interest, the injector is arranged on the wall of flue, further includes a setting
Diffusion disturbed flow pipe in the middle part of flue, the powder air-flow that injector sprays carry out efficiently after flowing through diffusion disturbed flow pipe with incoming flue gas
Mixing, purifying smoke.There is no pipeline in diffusion disturbed flow pipe, flue gas arrangement of nozzles on the wall of flue, stretch by the nozzle of length length
Into in diffusion disturbed flow pipe, the short nozzle of length is in the passage between diffusion flow-disturbing pipe outer wall and flue wall.At flue center
One diffusion disturbed flow pipe is set, and front end air-flow passes through diffusion disturbed flow pipe, and a part is flowed through out of diffusion disturbed flow pipe, a part of along expansion
Pressure flow-disturbing pipe outer wall flows through, and the air velocity that diffusion disturbed flow pipe to flow through in pipe reduces pressure and increases, under diffusion disturbed flow pipe
Two strands of air-flows different in flow rate are swum to be blended.
And perforate on the inclined-plane of diffusion disturbed flow pipe, aperture and the diffusion disturbed flow pipe length ratio d of the perforate1/L1=0.01
~0.1, the air-flow flowed through from diffusion flow-disturbing pipe outer wall can be blended by aperture and the air-flow flowed through in diffusion disturbed flow pipe；Its
The angle α of middle diffusion disturbed flow pipe inclined-plane and flue center line is 2~10 degree, the ratio between diffusion flow-disturbing length of tube and wall spacing L1/L2
=7~18, the ratio between diffusion flow-disturbing length of tube and flue width L1/L3=0.5~5.
And injector includes first jet 700 and second nozzle 800, the first jet is arranged on outside diffusion disturbed flow pipe
In passage between flue, mixed with the flue gas for flowing through diffusion disturbed flow pipe periphery；The second nozzle stretches into diffusion and disturbs
The powder sprayed inside flow tube is mixed with diffusion disturbed flow pipe inside smoke.
The first jet length L5 is longer than second nozzle L4, and wherein the aperture of second nozzle is d2, and described first sprays
Mouth, second nozzle are alternately arranged, and the length compares L4/L5=1~3, the draw ratio of stomata is L4/d2=0.5~2；It is alternately arranged
Nozzle between spacing it is equal, the spacing and flue width ratio are L6/L3=0.1~3.
A kind of sodium acid carbonate collection is defeated and injection method, comprises the following steps：
Step 1：Coarse powder particles of the particle diameter in 150um~200um are made through coal pulverizer in sodium acid carbonate, and coarse powder particles are through thick
Powder cyclone separator 1 is separated, the coarse granule isolated enter coarse powder strength screw conveyor 2, gas and ultra-fine grain into
Enter bag filter 5, drained into through air-introduced machine 6 in air.
Step 2：Coarse granule is sent into superfine mill 4 by screw conveyor 2 through oscillating feeder 3 in step 1, by thick
Grain wears into the superfine powder of 30um~40um, into fine powder cyclone separator 7；Fine powder is separated, particle diameter material up to standard enters thin
Powder screw conveyor 9, fine powder not up to standard continue back at superfine powder flour mill milling；
Step 3：Particle diameter material up to standard is sent to fine powder pulsed jet cloth filter 8 through fine powder screw conveyor 9 in step 2
Separated, the ultra-fine grain isolated is delivered to warehouse 10, and gas drains into air through pulse bag air-introduced machine；
Step 4：Superfine powder in step 3 in warehouse claims 14 through intermediate bin 13 into double helix measuring, to powder flow
Accurate measurement is carried out, the powder after metering enters next step spraying system；
Step 5：Powder in step 4 by metering is introduced into pipeline distributor 15 and powder is divided into four strands, through powder
Injector 16 spray into flue in, in flue set disturbed flow pipe 17, powder mixed under the action of disturbed flow pipe with flue gas it is more uniform,
Achieve the purpose that purifying smoke.
Transport system by the sodium hydrogen carbonate powder of sodium acid carbonate warehouse according to the powder amount needed for boiler desulfurization it is continuously adjustable it is defeated
Send in duct sorbent injection internal system, degree of regulation is+5%.
Injection apparatus includes pipeline distributor, it mainly includes dividing pulverized coal borne air flow 1 into the uniform distributor for 4.Material is
Carbon steel serves as a contrast wear-resistant ceramic, and service life was more than 1 year；Injector, sodium bicarbonate powder is ejected into diffuser and flue at a high speed
Injector.Injector uses wear resistant spray nozzle, effectively extends the service life of powder nozzle；And diffusion disturbed flow pipe, it is main to use
In the reduction of speed supercharging of air-flow and flow disturbance, it is ensured that realized in the range of limited chamber length and stablize, completely burn.
The basic principles, main features and the advantages of the invention have been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, without departing from the spirit and scope of the present invention, various changes and modifications of the present invention are possible, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent thereof.
Claims (4)
1. a kind of sodium acid carbonate collection is defeated and injection method, it is characterised in that including：
Step 1：Coarse powder particles are made through coal pulverizer in sodium acid carbonate, and coarse powder particles are separated through coarse powder cyclone separator, separation
The coarse granule gone out enters coarse powder strength screw conveyor, and gas and superfine powder enter bag filter, air drained into through air-introduced machine
In；
Step 2：Coarse granule is sent into superfine mill by coarse powder strength screw conveyor through oscillating feeder in step 1, will be thick
Particle wears into superfine powder, into fine powder cyclone separator；Fine powder cyclone separator separates fine powder, and particle diameter material up to standard enters
Fine powder screw conveyor, the fine dust of generation, which is sent to fine powder pulsed jet cloth filter, to be separated, the superfine powder isolated send to
Fine powder screw conveyor, gas drain into air through pulse bag air-introduced machine；
Step 3：In step 2 particle diameter material up to standard and through the superfine powder that fine powder pulsed jet cloth filter is isolated through fine powder spiral shell
Rotation conveyer is sent to warehouse；
Step 4：Superfine powder in step 3 in warehouse claims through intermediate bin into double helix measuring, powder flow is carried out accurate
Metering, the powder after metering enter next step spraying system；
Step 5：If the powder in step 4 by metering is introduced into pipeline distributor and powder is divided into carried interest, sprayed through injector
Enter in flue, diffusion disturbed flow pipe is set in flue, and powder mixes more uniform under the action of diffusion disturbed flow pipe with flue gas.
2. a kind of sodium acid carbonate collection according to claim 1 is defeated and injection method, it is characterised in that thick in the step 1
Powder particles particle diameter is 150um~200um.
3. a kind of sodium acid carbonate collection according to claim 1 is defeated and injection method, it is characterised in that surpasses in the step 2
The particle diameter up to standard for the superfine powder that thin flour mill is worn into is 30um~40um.
4. a kind of sodium acid carbonate collection according to claim 1 is defeated and injection method, it is characterised in that the pipeline distributor
Powder is divided into four strands.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107585577B (en) * | 2017-08-10 | 2019-01-04 | 青海盐湖工业股份有限公司 | A kind of particle transportation system of fast energy-saving economy |
| CN108392976A (en) * | 2018-05-21 | 2018-08-14 | 宁波市北仑环保固废处置有限公司 | A kind of sodium bicarbonate automation deacidification system and its process |
| CN109126404A (en) * | 2018-10-10 | 2019-01-04 | 江苏海澜正和环境科技有限公司 | A kind of dry-process deacidification system using sodium bicarbonate as reactant |
| CN109701382B (en) * | 2019-02-28 | 2022-05-17 | 兖矿集团有限公司 | Superfine powder dispersing and spraying system and processing method and application thereof |
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