CN105645113A - Sodium bicarbonate gathering, transporting and injecting method - Google Patents
Sodium bicarbonate gathering, transporting and injecting method Download PDFInfo
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- CN105645113A CN105645113A CN201610055919.XA CN201610055919A CN105645113A CN 105645113 A CN105645113 A CN 105645113A CN 201610055919 A CN201610055919 A CN 201610055919A CN 105645113 A CN105645113 A CN 105645113A
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- powder
- sodium bicarbonate
- fine powder
- flue
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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
-
- 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
-
- 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
-
- 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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- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mechanical Engineering (AREA)
- Food Science & Technology (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses a sodium bicarbonate gathering, transporting and injecting method. The sodium bicarbonate gathering, transporting and injecting method comprises the steps that firstly, sodium bicarbonate is manufactured into coarse powder particles through a coal mill; secondly, fine powder is separated, materials with the particle size meeting the standard enter a fine powder screw conveyor, and fine powder which does not meet the standard continues to return to an ultrafine powder mill to be milled; thirdly, the materials with the particle size meeting the standard in the second step are fed to a fine powder pulse bag-type dust collector through the fine powder screw conveyor to be separated, ultrafine particles obtained through separation are conveyed to a storage bin, and gas is exhausted to the air through the pulse bag-type dust collector; fourthly, the ultrafine powder in the storage bin in the third step enters a dual screw metering scale through an intermediate bin, and powder flow is accurately metered; and fifthly, the powder metered in the fourth step firstly enters a pipe distributor to be injected into a flue through an injector, the mixing effect of flue gas and the powder is increased through the flue, so that pollutants in the fuel gas are removed, and the aims of energy saving and emission reduction are achieved.
Description
Technical field
The present invention relates to that a kind of sodium bicarbonate collection is defeated and injection method, complete desulphurization and denitration process, can effectively remove the nitrogen oxides in flue gas, oxysulfide and other sour gas so that the flue gas qualified discharge after purification.
Background technology
In recent years, due to going from bad to worse of Domestic Environment situation, energy-conserving and emission-cutting technology is increasingly subject to country's attention, and achieves flourish. NaHCO3 absorption techniques is the desulfurization and denitrification integral technology that a kind of efficiency is higher, and this technology a step can complete desulphurization and denitration process, belongs to integration desulfurization denitration flue gas purifying technique. The pollutant controlling discharge are had significantly high clearance SO2 (> 99.5% by this technique), SO3 (> 99.5%), NOx (> 98%), Mercury hydrargyrum (> 98%), remove the sour gas such as H2SO4, HCl and HF simultaneously. As far back as the seventies, this technology is just found and is considered as best kitchen air contaminant control technology, but the application that excessively high operating cost makes old-fashioned technology is restricted. In recent years, along with the development of air contaminant treatment technology, what this Technology solved NaHCO3 recycles problem, becomes the process system with tremendous expansion potentiality, but this Technology needs to solve some technical bottlenecks simultaneously, so that the performance of this technology and economy reach optimum.
One of core technology as this process system, the powder process of NaHCO3, collects defeated and spraying technique and has decisive influence for the place to go efficiency of the pollutant in flue gas. NaHCO3 has easy deliquescence, the characteristics such as easy decomposition of being heated, the fineness of sodium bicarbonate powder is for improving with the contact area of flue gas pollutant thus improving pollutant removing efficiency and having a significant impact, and how solving the fineness of powder of sodium bicarbonate powder and the contradiction of thermal decomposition in pulverizing process is restrict the bottleneck of this technology; Simultaneously for the sodium bicarbonate powder made, how to ensure that it is carried at a distance, it is to avoid the problems such as the blocking occurred in course of conveying and deliquescence, become the another one problem of this technology; Meanwhile, sodium bicarbonate particle and the Homogeneous phase mixing of flue gas and the haptoreaction time of needs become the guarantee of pollutant removing efficiency.
In recent years, by the restriction of the high operation cost of NaHCO3 absorption techniques, domestic almost without corresponding commercial Application, relevant NaHCO3 sprays, the research of Mixing Technology report is less, the industrial products not having maturation can be purchased, it is necessary to carries out relevant device development, it is achieved technology closed loop.
Summary of the invention
Present invention solves the technical problem that and be: flue gas flow is big, and powder jetting amount is relatively small. Meeting being uniformly distributed of thin powder body in large space, technical difficulty is relatively big, designs and have developed that a kind of sodium bicarbonate collection is defeated and injection method, by NaHCO3 powder and flue gas Homogeneous phase mixing, increase the mixing effect of flue gas and powder body, remove the pollutant in flue gas, it is achieved the target of energy-saving and emission-reduction.
For reaching above-mentioned purpose, technical scheme is as follows:
A kind of sodium bicarbonate collection is defeated and injection method, it is characterised in that comprise the following steps:
Step one: sodium bicarbonate makes coarse powder particles through coal pulverizer, coarse powder particles is easily separated through coarse powder cyclone separator, and isolated coarse granule enters coarse powder strength conveying worm, gas and ultra-fine grain and enters sack cleaner, drains in air through air-introduced machine;
Step 2: in step one, coarse granule is sent into superfine mill through oscillating feeder by conveying worm, wears into micropowder by coarse granule, enters fine powder cyclone separator; Being separated by fine powder, the material entrance fine powder conveying worm that particle diameter is up to standard, fine powder not up to standard continues back at micropowder flour mill pulverizing;
Step 3: the material that in step 2, particle diameter is up to standard is delivered to fine powder pulsed jet cloth filter through fine powder conveying worm and is easily separated, and isolated ultra-fine grain is delivered to warehouse, and gas drains into air through pulse bag air-introduced machine;
Step 4: in step 3, the micropowder in warehouse claims through intermediate bin entrance double helix measuring, and powder flow is carried out accurate measurement, and the powder body after metering enters next step spraying system;
Step 5: being introduced into pipeline distributor through the powder body of metering in step 4 and powder body is divided into some stocks, spray in flue through ejector, arrange diffusion disturbed flow pipe in flue, powder body mixes more uniform with flue gas under the effect of diffusion disturbed flow pipe.
In a preferred embodiment of the invention, in described step one, coarse powder particles particle diameter is 150um��200um.
In a preferred embodiment of the invention, in described step 2, the particle diameter up to standard of the micropowder that superfine mill is worn into is 30um��40um.
In a preferred embodiment of the invention, powder body is divided into four strands by described pipeline distributor.
By technique scheme, the invention has the beneficial effects as follows:
1, adopting 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, and the contraction that a part realizes air-flow through diffusion disturbed flow pipe is accelerated; Another part flows through the diffusion realizing air-flow in diffusion disturbed flow pipe and slows down. Two strands of flue gases have bigger current difference, form effective blending in diffusion disturbed flow pipe downstream.
2, outside powder body is injected in diffusion disturbed flow pipe respectively, being uniformly distributed of powder body is realized along with the convection current of main flume blends;
3, being sprayed by the powder body circle of contact, the function influence such as backflow of main flume, powder body mean residence time in flue extends to some extent.
4, optimize the flow field of ejector, reduce the resistance of ejector;
5, system automation degree is high, have employed key parameter linkage and regulates the method for designing with fault alarm interlocking action, improves reliability and safety;
6, possesses effect of integrated desulfurization, denitration and elimination heavy metal.
7, improve the fine powder rate of sodium bicarbonate, it is ensured that fineness of powder, solve sodium bicarbonate powder problem of local pyro lysis in Ultrafine Grinding, it is ensured that fine powder rate.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, the accompanying drawing used required in embodiment or description of the prior art will be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the premise not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying 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 is the schematic diagram of the ejector of the present invention.
Fig. 3 b is the left view of the ejector of the present invention.
Fig. 4 a is the diffusion disturbed flow pipe schematic diagram of the present invention.
Fig. 4 b is the left view of the diffusion disturbed flow pipe of the present invention.
Fig. 5 is the pipeline distributor schematic diagram of the present invention.
Detailed description of the invention
For the technological means making the present invention realize, creation characteristic, reach purpose and effect and be easy to understand, below in conjunction with being specifically illustrating, the present invention is expanded on further.
See figures.1.and.2, a kind of sodium bicarbonate collection is defeated and injection method, including: a powder transfer device, described powder transfer device includes the coarse powder cyclone separator 1 that coarse powder particles is separated, described coarse powder cyclone separator connects coarse powder strength conveying worm 2 by pipeline, described coarse powder strength conveying worm 2 is connected with superfine mill 4 by oscillating feeder 3, and coarse granule is worn into micropowder by described superfine mill 3; Also including the fine powder cyclone separator being connected with the outfan of superfine mill 4, the micropowder up to standard worn into enters fine powder conveying worm; Isolated ultra-fine grain is delivered to and its warehouse being connected by pipeline by described fine powder conveying worm 4; The material particular diameter entering scratch system is 150um��200um, after wearing into coarse powder particles, enters coarse powder cyclone separator 1 and is easily separated in coal pulverizer, and the thick solid particle of sedimentation enters superfine mill 4 through coarse powder strength conveying worm 2 and oscillating feeder 3.
And gas and fine grained are further separated through coarse powder pulsed jet cloth filter 5, gas drains into air through coarse powder air-introduced machine 6, and fine grained enters superfine mill together with the isolated thick solid of upper level. Underproof material falls after rise to be refaced, and qualified material then enters fine powder cyclone separator 7 with air-flow, and dust falls, the discharge valve of bottom discharge.
Fraction fine dust then enters fine powder pulsed jet cloth filter 8 with air-flow, and sticks to filter bag surface. Pulse valve controls high pressure draught and sprays from filter bag internal moment, adhere to dust thereon and then shake suddenly whereabouts because of filter bag, the warehouse 10 of NaHCO3 fine powder delivered to by the material that the fine powder conveying worm 9 of bottom is then collected two places, and after scratch system pulverizing, material particular diameter becomes 30um��40um about 400 order.
The one powder metering device being connected with described warehouse, powder flow is carried out accurate measurement by described powder metering device, and the powder body after metering enters powder jetting device;
And a powder jetting device, described powder jetting device includes the pipeline distributor 15 being connected with powder metering device, powder body is divided into entrance ejector 16 after some stocks through pipeline distributor, described ejector is arranged on the wall of flue, also include one and be arranged at diffusion disturbed flow pipe 17 in the middle part of flue, high efficient mixed, purifying smoke is carried out with incoming flow flue gas after the powder body airflow passes diffusion disturbed flow pipe of ejector ejection.
Further, the upper end of coarse powder cyclone separator connects sack cleaner 5, the output pipe of described sack cleaner is provided with air-introduced machine, air-introduced machine provides kinetic energy, gas and ultra-fine grain are drained in air.
Warehouse discharge port will arrange manual isolation valve, inlet valve, material feeding pump, vacuum pressure relief valve. It is provided with gasification installation 11 and heater 12 at the bottom of storehouse, adds hot-air by gasification installation 11 to conveying in warehouse. The outlet of the warehouse 10 of NaHCO3 fine powder connects intermediate bin 13 and fine powder double helix measuring claims 14 accurately to control powder flow.
It addition, powder metering device includes being positioned at top speed governing feeding serew parts and being positioned at the constant speed metering screw parts of bottom; Described speed governing feeding serew parts include a feeding serew device 100, and nesting is arranged at the feeding serew driving device 200 in feeding serew device 100, and described feeding serew device side is also associated with charging aperture 110; Described constant speed metering screw parts include a metering screw device 300, and a nesting is arranged at the metering screw driving device 400 in metering screw device, and described metering screw device side is provided with discharging opening 310. Wherein speed governing feeding serew parts also include surrounding the metering reamer 500 being arranged in feeding serew device, and described metering reamer is provided with load sensor. Wherein above-mentioned parts are mounted on installing on pedestal 600.
Material is transported to the metering reamer connected below by charging aperture through conveying worm, it is installed on the load sensor above metering reamer the weight of material detected and produce the voltage signal feeding controller to be proportional to load of weighing, draws instantaneous delivery and cumulative weight value after computing together with default reamer speed. Instantaneous delivery is with specified rate through comparing, and deviation is output regulation signal after the digital regulated computing of PI, by the rotating speed of speed regulating control instrument control buncher, to reach the purpose of dosing.
With reference to Fig. 3, shown in Fig. 4 and Fig. 5, further, powder jetting device, including pipeline distributor, powder body is divided into entrance ejector after some stocks through pipeline distributor, described ejector is arranged on the wall of flue, also include one and be arranged at diffusion disturbed flow pipe in the middle part of flue, after the powder body airflow passes diffusion disturbed flow pipe of ejector ejection, carry out high efficient mixed, purifying smoke with incoming flow flue gas. Not having pipeline in diffusion disturbed flow pipe, flue gas arrangement of nozzles is on the wall of flue, and the nozzle of length length puts in diffusion disturbed flow pipe, in length short nozzle passage between diffusion disturbed flow pipe outer wall and flue wall. At the centrally disposed diffusion disturbed flow pipe of flue, front end air-flow is through diffusion disturbed flow pipe, a part flows through in diffusion disturbed flow pipe, a part flows through along diffusion disturbed flow pipe outer wall, the air velocity flow through in pipe that makes diffusion disturbed flow pipe reduces pressure and increases, and two strands of air-flows in diffusion disturbed flow pipe downstream different in flow rate blend.
And perforate on the inclined-plane of diffusion disturbed flow pipe, the aperture of described perforate and diffusion disturbed flow pipe length ratio d1/L1=0.01��0.1, the air-flow flow through from diffusion disturbed flow pipe outer wall can be blended by the air-flow flow through in aperture and diffusion disturbed flow pipe; Wherein the angle �� of diffusion disturbed flow pipe inclined-plane and flue centrage is 2��10 degree, the ratio L of diffusion disturbed flow pipe length and wall spacing1/L2=7��18, the ratio L of diffusion disturbed flow pipe length and flue width1/L3=0.5��5.
And ejector includes first jet 700 and second nozzle 800, described first jet is arranged in the passage between diffusion disturbed flow pipe outside and flue, and the flue gas peripheral with flowing through diffusion disturbed flow pipe mixes;Described second nozzle stretches into the powder body of the internal ejection of diffusion disturbed flow pipe and mixes with diffusion disturbed flow pipe inside smoke.
Described first jet length L5 is longer than second nozzle L4, and wherein the aperture of second nozzle is d2, and described first jet, second nozzle are alternately arranged, described length ratio L4/L5=1��3, the draw ratio of pore is L4/d2=0.5��2; Between the nozzle being alternately arranged, spacing is equal, and described spacing and flue width ratio are L6/L3=0.1��3.
A kind of sodium bicarbonate collection is defeated and injection method, comprises the following steps:
Step one: sodium bicarbonate makes the particle diameter coarse powder particles at 150um��200um through coal pulverizer, coarse powder particles is easily separated through coarse powder cyclone separator 1, isolated coarse granule enters coarse powder strength conveying worm 2, gas and ultra-fine grain enter sack cleaner 5, drain in air through air-introduced machine 6.
Step 2: in step one, coarse granule is sent into superfine mill 4 through oscillating feeder 3 by conveying worm 2, wears into the micropowder of 30um��40um by coarse granule, enters fine powder cyclone separator 7; Being separated by fine powder, the material entrance fine powder conveying worm 9 that particle diameter is up to standard, fine powder not up to standard continues back at micropowder flour mill pulverizing;
Step 3: the material that in step 2, particle diameter is up to standard is delivered to fine powder pulsed jet cloth filter 8 through fine powder conveying worm 9 and is easily separated, and isolated ultra-fine grain is delivered to warehouse 10, and gas drains into air through pulse bag air-introduced machine;
Step 4: in step 3, the micropowder in warehouse enters double helix measuring through intermediate bin 13 and claims 14, and powder flow is carried out accurate measurement, and the powder body after metering enters next step spraying system;
Step 5: be introduced into pipeline distributor 15 through the powder body of metering in step 4 and powder body is divided into four strands, spray in flue through powder spray emitter 16, arranging disturbed flow pipe 17 in flue, powder body mixes more uniform under the effect of disturbed flow pipe with flue gas, reaches the purpose of purifying smoke.
The sodium hydrogen carbonate powder of sodium bicarbonate warehouse is delivered in duct sorbent injection internal system according to the powder amount continuously adjustabe needed for boiler desulfurization by induction system, and degree of regulation is+5%.
Injection apparatus includes pipeline distributor, its uniform distributor mainly including pulverized coal borne air flow 1 is divided into 4. Material is carbon steel lining wear-resistant ceramic, and service life was more than 1 year; Ejector, by the ejector in sodium bicarbonate powder high velocity jet to diffuser and flue. Ejector adopts wear resistant spray nozzle, effectively extends the service life of powder body nozzle; And diffusion disturbed flow pipe, it is mainly used in reduction of speed supercharging and the flow disturbance of air-flow, it is ensured that realize stablizing, burning completely within the scope of limited chamber length.
The ultimate principle of the present invention and principal character and advantages of the present invention have more than been shown and described. Skilled person will appreciate that of the industry; the present invention is not restricted to the described embodiments; described in above-described embodiment and description is that principles of the invention is described; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements both fall within the claimed scope of the invention. Claimed scope is defined by appending claims and equivalent thereof.
Claims (4)
1. a sodium bicarbonate collection is defeated and injection method, it is characterised in that including:
Step one: sodium bicarbonate makes coarse powder particles through coal pulverizer, coarse powder particles is easily separated through coarse powder cyclone separator, and isolated coarse granule enters coarse powder strength conveying worm, gas and ultra-fine grain and enters sack cleaner, drains in air through air-introduced machine;
Step 2: in step one, coarse granule is sent into superfine mill through oscillating feeder by conveying worm, wears into micropowder by coarse granule, enters fine powder cyclone separator; Being separated by fine powder, the material entrance fine powder conveying worm that particle diameter is up to standard, fine powder not up to standard continues back at micropowder flour mill pulverizing;
Step 3: the material that in step 2, particle diameter is up to standard is delivered to fine powder pulsed jet cloth filter through fine powder conveying worm and is easily separated, and isolated ultra-fine grain is delivered to warehouse, and gas drains into air through pulse bag air-introduced machine;
Step 4: in step 3, the micropowder in warehouse claims through intermediate bin entrance double helix measuring, and powder flow is carried out accurate measurement, and the powder body after metering enters next step spraying system;
Step 5: being introduced into pipeline distributor through the powder body of metering in step 4 and powder body is divided into some stocks, spray in flue through ejector, arrange diffusion disturbed flow pipe in flue, powder body mixes more uniform with flue gas under the effect of diffusion disturbed flow pipe.
2. a kind of sodium bicarbonate collection according to claim 1 is defeated and injection method, it is characterised in that in described step one, coarse powder particles particle diameter is 150um��200um.
3. a kind of sodium bicarbonate collection according to claim 1 is defeated and injection method, it is characterised in that the particle diameter up to standard of the micropowder that in described step 2, superfine mill is worn into is 30um��40um.
4. a kind of sodium bicarbonate collection according to claim 1 is defeated and injection method, it is characterised in that powder body is divided into four strands by described pipeline distributor.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107585577A (en) * | 2017-08-10 | 2018-01-16 | 青海盐湖工业股份有限公司 | A kind of particle induction 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 |
| CN109701382A (en) * | 2019-02-28 | 2019-05-03 | 兖矿集团有限公司 | A kind of dispersion of ultrafine powder and spraying system and its processing method and purposes |
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