CN104818075A - Equipment and method for desulfurization before combustion of coal by using steam explosion machine and extracting agent - Google Patents
Equipment and method for desulfurization before combustion of coal by using steam explosion machine and extracting agent Download PDFInfo
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- 239000003245 coal Substances 0.000 title claims abstract description 164
- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 62
- 238000000034 method Methods 0.000 title claims abstract description 62
- 230000023556 desulfurization Effects 0.000 title claims abstract description 60
- 238000004880 explosion Methods 0.000 title claims abstract description 41
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 38
- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 26
- 238000000605 extraction Methods 0.000 claims abstract description 45
- 239000007788 liquid Substances 0.000 claims abstract description 25
- 238000002156 mixing Methods 0.000 claims abstract description 16
- 239000002360 explosive Substances 0.000 claims description 58
- 238000009833 condensation Methods 0.000 claims description 30
- 230000005494 condensation Effects 0.000 claims description 30
- 238000005406 washing Methods 0.000 claims description 23
- 239000007789 gas Substances 0.000 claims description 15
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- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical class [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 5
- 239000007787 solid Substances 0.000 claims description 5
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- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 18
- 239000005864 Sulphur Substances 0.000 description 12
- 230000008569 process Effects 0.000 description 10
- 239000000126 substance Substances 0.000 description 10
- 238000005516 engineering process Methods 0.000 description 9
- 238000006243 chemical reaction Methods 0.000 description 7
- 239000011593 sulfur Substances 0.000 description 6
- 229910052717 sulfur Inorganic materials 0.000 description 6
- 238000004140 cleaning Methods 0.000 description 3
- 229910052683 pyrite Inorganic materials 0.000 description 3
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention particularly relates to a piece of equipment and a method for desulfurization before combustion of coal by using a steam explosion machine and an extracting agent. The equipment and the method for desulfurization before combustion of coal by using the steam explosion machine and the extracting agent comprise a raw coal mixing device, a steam boiler, the steam explosion machine, a discharge bin, vacuum equipment, a coal washer, conveying equipment and a PLC (Programmable Logic Controller) intelligent controller, wherein the conveying equipment comprises an air compressor, a raw coal feed switch, a steam switch, a discharge switch and pipelines for connecting each equipment. According to the equipment and the method for desulfurization before combustion of coal by using the steam explosion machine and the extracting agent, the steam explosion extraction technology is innovatively adopted, mutual effect of the raw coal particles and the alkaline extraction liquid is quickened, further the desulfurization rate is greatly improved, and the desulfurization rate reaches 73-91 percent; the problems of climatic change and environmental protection of China are favorably and greatly improved by greatly popularizing and implementing the equipment and the method, the equipment and the method contribute to sustainable economic development of China and also contribute to industrial and product structure adjustment of coal enterprises, and the market competitiveness of the enterprises is improved.
Description
Technical field
The present invention relates to Desulphurization Technology for Coal field, particularly a kind of equipment and method utilizing the coal desulfurization before combustion of Steam explosive machine and extraction agent.
Background technology
Sulphur in coal is not only harmful to the conversion of coal processing, and also result in serious pollution to environment, and therefore, in coal, removing of sulphur is a major issue in coal utilization process.
The desulfurization technology of current coal and technique are mainly divided into desulfurization after desulfurization before combustion, sulphur fixation in coal combustion and combustion.Wherein, desulfurization before combustion, to remove in coal efficiency in sulphur content lower, is therefore difficult to the requirement meeting environmental protection.And some sulphur-fixing agents are mainly added in desulfurization in coal in combustion, in the process of coal combustion, SO
2just be fixed in cinder by it Deng sulfur-bearing thing, fluidized-bed sulfur solidifying technique, capturing sulfur briquette technology, stove inner direct desulfurization technology etc. all belong to sulphur fixation in coal combustion.Sulphur fixation in coal combustion less investment, working cost is low, does not produce waste gas, but sulphur fixation in coal combustion can have certain restriction to the temperature of burner hearth, affect the normal operation of Coal dressing process, efficiency is reduced greatly, and the desulfuration efficiency of the method is also very low; Development and the application of the flue gas desulfurization technique after burning are close to maturation, after combustion, the method for desulfurization is a lot, as spray drying FGD process, wet process of FGD etc., although but the method desulfuration efficiency of this desulfurization is higher, but technological process more complicated, investment and working cost all higher, and occupied ground is larger etc., and these deficiencies limit its widespread use.
Consider the quality of various method, we adopt maximum or desulfurization before combustion at present, below we just mainly discuss desulfurization before combustion.The method of the desulfurization before combustion of coal is a lot, can be divided into physical desulfurization, chemical desulfurization and biological process desulfurization three kinds substantially.
1 physical desulfurization method
Physical desulfurization is the method removing inorganic sulfur in coal according to difference in surface chemical property, electroconductibility, density and magnetic etc. of coal particles and sulfocompound.Up to now, physical cleaning method is only industrialized coal purification techniques.The key link of coal physical cleaning system is the assorting room that product is separated with waste residue.Generally comprise following three processes: i.e. the dehydration of the pre-treatment of coal, the sorting of coal and product.Physical desulfurization method conventional at present has conventional washing process, jigging method, dense medium method, flotation etc.
(1) conventional washing process
This is one of the main method of deliming in coal, desulfurization, has had certain commercial production scale at present.China is a unique country measured using raw coal as output in the world, and the raw coal selective ratio of moral, Australia, method, Deng state is all more than 90%, and China only has about 40%, and wherein steam coal enters the rate of washing and is only 7.6%, far below other country.
(2) jigging method
Its sill principle is: coal seam is in the liquid of pulsation, and because liquid periodically moves up and down, the pucker & bloat replaced, causes coal grain to carry out layering by the order increased gradually from top to bottom because of density, thus reach the object of sorting.Because jigging method is suitable for various different raw coal, have flow process simple, less investment, operation of equipment and repair and maintenance are all more convenient, and processing power is strong, and low cost and other advantages, therefore jigging method is that current most widely used one takes off inorganic sulfur method.
In recent years, the development of coal separation production technology is very fast, but coal separation fundamental research also can not meet the development need of production.Up to the present, the physical cleaning technology of coal only can reduce content and the pyritic sulphur content of ash in coal, the pyrite of part can only be removed, and this method to remove particulate scatter organic mineral substance and impracticable, the waste residue that coal separating plant discharges simultaneously comprises coal petrography stone and coal slime, containing a large amount of duffs, thus cause the waste of the energy.
2 microwave chemical doctor treatments
(1) chemical desulfurization method
Chemical process desulfurization mainly utilizes oxygenant sulphur oxidation or sulphur is cemented out thus reaches the object of desulfurization.The efficiency of chemical method desulfurization is higher, can remove the organosulfur of most of inorganic sulfur and considerable part.According to the kind of chemical reagent used and the difference of reaction principle, chemical desulfurization method can be divided into: oxidation style, alkaline purification method, pyrolysis method, solvent extration etc.
Most chemical desulfurization methods is all carry out at high temperature under high pressure, and what have also uses different oxygenants, therefore, process cost and facility investment expense higher.In addition, reaction conditions, also than stronger, may cause ature of coal to change.
(2) microwave chemical doctor treatment
But adopt microwave chemical method desulfurization, due to the distinctive heating function of microwave, need not carry out at high temperature under high pressure, process cost and facility investment expense lower, in addition, reaction conditions is also more weak, and ature of coal can not be caused to change.This is the distinctive desulfurization of coal technology of my company.
3 microwave high-gradient magnetic methods
Mainly use microwave makes the FeS in coal
2resolve into FeS, produce Fu Tiequ on pyritous surface, then by having the high gradient magnetic separator of super-strength Permanent magnet plate, pyrite particle will to be attracted on magnetic cylinder thus the sulphur removed in coal.This method not only can remove the sulphur of pyrite in coal, but also has the advantage of moisture-free coal.
4 biological desulfurization
Biological desulphurization is the object utilizing the redox reaction of microbial metabolism to reach desulfurization at normal temperatures and pressures.The method is from Biohydrometallurgy technical development.The sill method of current biological desulphurization for coal has: Bioleaching method, biological surface oxidizing treatment and biological selectivity flocculence etc.
Summary of the invention
The present invention, in order to make up the defect of prior art, provides a kind of equipment and method of utilizing the coal desulfurization before combustion of Steam explosive machine and extraction agent of high desulfurization rate.
The present invention is achieved through the following technical solutions:
Utilize an equipment for the coal desulfurization before combustion of Steam explosive machine and extraction agent, it is characterized in that: comprise raw coal mixing device, steam boiler, Steam explosive machine, blanking bin, vacuum apparatus, coal washing plant, handling equipment and PLC intelligent controller, wherein vacuum apparatus comprises vacuum pump and condensation division box, and described handling equipment comprises air compressor machine, connects the pipeline of each equipment, and the raw coal charging switch that pipeline is arranged, steam cock and blanking switch, described raw coal mixing device is connected to Steam explosive machine by discharge plate, described steam boiler vapour outlet connects the admission opening bottom Steam explosive machine by steam-pipe, blanking hole bottom Steam explosive machine is connected to the top of blanking bin by blanking pipe, described blanking bin bottom is provided with discharge port, top is provided with vapor pipe, described discharge port connects coal washing plant, described vapor pipe is connected with the suction hole of vacuum pump by gas exhaust duct, the production well of described vacuum pump is connected to the top of condensation division box by outlet pipe, condensation division box top is provided with venting port, bottom is provided with relief hole.
Charging tray is connected to Steam explosive machine top, discharge plate offers 4 ~ 16 feed ports, and accordingly, described Steam explosive machine inside is divided into 4 ~ 16 relatively independent steam-explosion jars, and each steam-explosion jar top is provided with feed-pipe, and described feed port and feed-pipe are with the use of completing charging; Be respectively equipped with admission opening and blanking hole bottom each steam-explosion jar, each feed-pipe, admission opening and blanking hole are respectively equipped with raw coal charging switch, steam cock and blanking switch; The raw coal charging switch of each steam-explosion jar, steam cock and blanking switch are interlocks controlled by air compressor cylinder, can realize locking simultaneously.
More excellent, described discharge plate offers 10 feed ports, described Steam explosive machine inside is divided into 10 relatively independent steam-explosion jars.
The blanking hole of each steam-explosion jar described is connected to same blanking pipe, and described blanking pipe diameter is 240 ~ 300mm.
The present invention utilizes the method for the coal desulfurization before combustion of Steam explosive machine and extraction agent, it is characterized in that comprising the following steps:
(1) raw coal fully mixes with alkaline extraction liquid in raw coal mixing device, then enters discharge plate, the feed port charging in turn one by one of described discharge plate;
(2) opening steam cock after completing charging starts into steam, enter steam complete after air compressor machine cylinder control raw coal charging switch, steam cock and blanking switch and close simultaneously, open blanking switch after dimension pressure 3 ~ 10min and start blanking;
(3) after the raw coal that the quick-fried extraction treatment of vapour is crossed enters blanking bin together with steam, gas is wherein drawn into condensation division box from the vapor pipe at top by vacuum pump, get rid of from the relief hole of condensation division box bottom after water vapor condensation, non-condensable gases is discharged from top vent; Liquid in blanking bin, solid two-phase product enter coal washing plant by discharge port, and wash, now in raw coal, insoluble sulfocompound becomes water miscible sulfocompound, fractionate aqueous solutions and raw coal after washing.
In described step (1), alkaline extraction liquid is the saturated NaOH aqueous solution under normal temperature, and the mass ratio of alkaline extraction liquid and raw coal is 0.3 ~ 0.7:1.
In described step (2), the mass ratio of steam consumption and raw coal is 0.3 ~ 0.6:1, and raw coal is with being steam heated to 180 ~ 235 DEG C, more excellent, and the dimension pressure time is 5min.
In described step (3), the rate of air sucked in required of vacuum pump is 200 ~ 250t/h.
The invention has the beneficial effects as follows: this utilizes equipment and the method for the coal desulfurization before combustion of Steam explosive machine and extraction agent, creatively adopt the quick-fried abstraction technique of vapour, accelerate the interaction of raw coal particle and alkaline extraction liquid, and then greatly improve desulfurization degree, make desulfurization degree reach 73% ~ 91%; Widely popularize and implement the present invention, being conducive to greatly improving Our country's Climate and environmental protection problem, being conducive to China's sustainable economic development, being also conducive to coal enterprise adjustment industry, product structure, improving market competitiveness of enterprises.
Accompanying drawing explanation
Accompanying drawing 1 utilizes the coal desulfurization before combustion system schematic of Steam explosive machine and extraction agent for the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in detail.
This utilizes the equipment of the coal desulfurization before combustion of Steam explosive machine and extraction agent, comprise raw coal mixing device, steam boiler, Steam explosive machine, blanking bin, vacuum apparatus, coal washing plant, handling equipment and PLC intelligent controller, wherein vacuum apparatus comprises vacuum pump and condensation division box, handling equipment comprises air compressor machine, raw coal charging switch, steam cock, blanking switch and connect the pipeline of each equipment, discharge plate is equipped with on described Steam explosive machine top, and discharge plate has feed port, is also provided with admission opening and blanking hole bottom described Steam explosive machine, described raw coal mixing device is connected to Steam explosive machine by discharge plate, described steam boiler vapour outlet connects the admission opening bottom Steam explosive machine by steam-pipe, blanking hole bottom Steam explosive machine is connected to the top of blanking bin by blanking pipe, described blanking bin bottom is provided with discharge port, top is provided with vapor pipe, described discharge port connects coal washing plant, described vapor pipe is connected with the suction hole of vacuum pump by gas exhaust duct, the production well of described vacuum pump is connected to the top of condensation division box by outlet pipe, condensation division box top is provided with venting port, bottom is provided with relief hole.
Described discharge plate offers 6 feed ports, described Steam explosive machine inside is divided into 6 relatively independent steam-explosion jars, and each steam-explosion jar top is provided with feed-pipe, and described feed port and feed-pipe are with the use of completing charging; Be respectively equipped with admission opening and blanking hole bottom each steam-explosion jar, each feed-pipe, admission opening and blanking hole are respectively equipped with raw coal charging switch, steam cock and blanking switch; The raw coal charging switch of each steam-explosion jar, steam cock and blanking switch are interlocks controlled by air compressor machine cylinder, can realize locking simultaneously.
The blanking hole of each steam-explosion jar described is connected to same blanking pipe, and described blanking pipe diameter is 255mm.
Described air compressor machine connects PLC intelligent controller, the cylinder of air compressor machine is undertaken locking and opening by the locking slot of control cylinder bar and each switch, control each switch, thus realize the chain control of raw coal charging switch, steam cock and the blanking switch to each steam-explosion jar.The raw coal charging switch of each steam-explosion jar, steam cock and blanking switch are interlocks controlled by air compressor cylinder, and three switches for same steam-explosion jar can realize locking simultaneously.
Described PLC intelligent controller also connects the temperature sensor, pressure transmitter and the flow rate sensor that are positioned at Steam explosive machine and each pipeline.PLC intelligent controller adopts an intellectual key control, and touch-screen controls master control board, and can carry out the operation of the power of complete machine, the transmission speed of material and temperature etc. and the running condition of monitoring equipment at any time on the touchscreen, complete machine is simple, convenient, stable performance.
This utilizes the method for the coal desulfurization before combustion of Steam explosive machine and extraction agent, comprises the following steps:
(1) raw coal fully mixes with alkaline extraction liquid in raw coal mixing device, then enters discharge plate, the feed port charging in turn one by one of described discharge plate; Wherein, alkaline extraction liquid is the saturated NaOH aqueous solution under normal temperature, and the mass ratio of alkaline extraction liquid and raw coal is 0.3:1.
(2) opening steam cock after completing charging starts into steam, enter steam complete after air compressor machine cylinder control raw coal charging switch, steam cock and blanking switch and close simultaneously, open blanking switch after dimension pressure 3min and start blanking; Wherein, the mass ratio of steam consumption and raw coal is 0.3:1, and raw coal is with being steam heated to 180 ~ 235 DEG C.
(3) after the raw coal that the quick-fried extraction treatment of vapour is crossed enters blanking bin together with steam, gas is wherein drawn into condensation division box from the vapor pipe at top by vacuum pump (rate of air sucked in required of vacuum pump is 210t/h), get rid of from the relief hole of condensation division box bottom after water vapor condensation, non-condensable gases is discharged from top vent; Liquid in blanking bin, solid two-phase product enter coal washing plant by discharge port, and wash, now in raw coal, insoluble sulfocompound becomes water miscible sulfocompound, fractionate aqueous solutions and raw coal after washing.
Embodiment 2
This utilizes the equipment of the coal desulfurization before combustion of Steam explosive machine and extraction agent, comprise raw coal mixing device, steam boiler, Steam explosive machine, blanking bin, vacuum apparatus, coal washing plant, handling equipment and PLC intelligent controller, wherein vacuum apparatus comprises vacuum pump and condensation division box, handling equipment comprises air compressor machine, raw coal charging switch, steam cock, blanking switch and connect the pipeline of each equipment, discharge plate is equipped with on described Steam explosive machine top, and discharge plate has feed port, is also provided with admission opening and blanking hole bottom described Steam explosive machine, described raw coal mixing device is connected to Steam explosive machine by discharge plate, described steam boiler vapour outlet connects the admission opening bottom Steam explosive machine by steam-pipe, blanking hole bottom Steam explosive machine is connected to the top of blanking bin by blanking pipe, described blanking bin bottom is provided with discharge port, top is provided with vapor pipe, described discharge port connects coal washing plant, described vapor pipe is connected with the suction hole of vacuum pump by gas exhaust duct, the production well of described vacuum pump is connected to the top of condensation division box by outlet pipe, condensation division box top is provided with venting port, bottom is provided with relief hole.
Described discharge plate offers 10 feed ports, described Steam explosive machine inside is divided into 10 relatively independent steam-explosion jars, and each steam-explosion jar top is provided with feed-pipe, and described feed port and feed-pipe are with the use of completing charging; Be respectively equipped with admission opening and blanking hole bottom each steam-explosion jar, each feed-pipe, admission opening and blanking hole are respectively equipped with raw coal charging switch, steam cock and blanking switch; The raw coal charging switch of each steam-explosion jar, steam cock and blanking switch are interlocks controlled by air compressor machine cylinder, can realize locking simultaneously.
The blanking hole of each steam-explosion jar described is connected to same blanking pipe, and described blanking pipe diameter is 285mm.
This utilizes the method for the coal desulfurization before combustion of Steam explosive machine and extraction agent, comprises the following steps:
(1) raw coal fully mixes with alkaline extraction liquid in raw coal mixing device, then enters discharge plate, the feed port charging in turn one by one of described discharge plate; Wherein, alkaline extraction liquid is the saturated NaOH aqueous solution under normal temperature, and the mass ratio of alkaline extraction liquid and raw coal is 0.5:1.
(2) opening steam cock after completing charging starts into steam, enter steam complete after air compressor machine cylinder control raw coal charging switch, steam cock and blanking switch and close simultaneously, open blanking switch after dimension pressure 5min and start blanking; Wherein, the mass ratio of steam consumption and raw coal is 0.45:1, and raw coal is with being steam heated to 180 ~ 235 DEG C.
(3) after the raw coal that the quick-fried extraction treatment of vapour is crossed enters blanking bin together with steam, gas is wherein drawn into condensation division box from the vapor pipe at top by vacuum pump (rate of air sucked in required of vacuum pump is 220t/h), get rid of from the relief hole of condensation division box bottom after water vapor condensation, non-condensable gases is discharged from top vent; Liquid in blanking bin, solid two-phase product enter coal washing plant by discharge port, and wash, now in raw coal, insoluble sulfocompound becomes water miscible sulfocompound, fractionate aqueous solutions and raw coal after washing.
Embodiment 3
This utilizes the equipment of the coal desulfurization before combustion of Steam explosive machine and extraction agent, comprise raw coal mixing device, steam boiler, Steam explosive machine, blanking bin, vacuum apparatus, coal washing plant, handling equipment and PLC intelligent controller, wherein vacuum apparatus comprises vacuum pump and condensation division box, handling equipment comprises air compressor machine, raw coal charging switch, steam cock, blanking switch and connect the pipeline of each equipment, discharge plate is equipped with on described Steam explosive machine top, and discharge plate has feed port, is also provided with admission opening and blanking hole bottom described Steam explosive machine, described raw coal mixing device is connected to Steam explosive machine by discharge plate, described steam boiler vapour outlet connects the admission opening bottom Steam explosive machine by steam-pipe, blanking hole bottom Steam explosive machine is connected to the top of blanking bin by blanking pipe, described blanking bin bottom is provided with discharge port, top is provided with vapor pipe, described discharge port connects coal washing plant, described vapor pipe is connected with the suction hole of vacuum pump by gas exhaust duct, the production well of described vacuum pump is connected to the top of condensation division box by outlet pipe, condensation division box top is provided with venting port, bottom is provided with relief hole.
Described discharge plate offers 14 feed ports, described Steam explosive machine inside is divided into 14 relatively independent steam-explosion jars, and each steam-explosion jar top is provided with feed-pipe, and described feed port and feed-pipe are with the use of completing charging; Be respectively equipped with admission opening and blanking hole bottom each steam-explosion jar, each feed-pipe, admission opening and blanking hole are respectively equipped with raw coal charging switch, steam cock and blanking switch; The raw coal charging switch of each steam-explosion jar, steam cock and blanking switch are interlocks controlled by air compressor machine cylinder, can realize locking simultaneously.
The blanking hole of each steam-explosion jar described is connected to same blanking pipe, and described blanking pipe diameter is 300mm.
This utilizes the method for the coal desulfurization before combustion of Steam explosive machine and extraction agent, comprises the following steps:
(1) raw coal fully mixes with alkaline extraction liquid in raw coal mixing device, then enters discharge plate, the feed port charging in turn one by one of described discharge plate; Wherein, alkaline extraction liquid is the saturated NaOH aqueous solution under normal temperature, and the mass ratio of alkaline extraction liquid and raw coal is 0.65:1.
(2) opening steam cock after completing charging starts into steam, enter steam complete after air compressor machine cylinder control raw coal charging switch, steam cock and blanking switch and close simultaneously, open blanking switch after dimension pressure 8min and start blanking; Wherein, the mass ratio of steam consumption and raw coal is 0.6:1, and raw coal is with being steam heated to 180 ~ 235 DEG C.
(3) after the raw coal that the quick-fried extraction treatment of vapour is crossed enters blanking bin together with steam, gas is wherein drawn into condensation division box from the vapor pipe at top by vacuum pump (rate of air sucked in required of vacuum pump is 245t/h), get rid of from the relief hole of condensation division box bottom after water vapor condensation, non-condensable gases is discharged from top vent; Liquid in blanking bin, solid two-phase product enter coal washing plant by discharge port, and wash, now in raw coal, insoluble sulfocompound becomes water miscible sulfocompound, fractionate aqueous solutions and raw coal after washing.
The present invention creatively proposes the quick-fried abstraction desulfurization technology of a kind of vapour, utilize steam explosion pre-treatment, steam-explosion jar open blanking switch start blanking time, it is unexpected that decompression spurt, can produce secondary steam in steam-explosion jar, volume surges, by the effect of mechanical force, destroy former coal texture, accelerate the interaction of raw coal particle and extraction liquid.In addition, the feed port charging in turn one by one of discharge plate, each steam-explosion jar independent reaction.Therefore be intermittent feeding with regard to certain steam-explosion jar, rhythmic reaction, intermittent take-off, and to whole Steam explosive machine, be then continuously feeding, successive reaction, continuous discharge.
Claims (8)
1. utilize an equipment for the coal desulfurization before combustion of Steam explosive machine and extraction agent, it is characterized in that: comprise raw coal mixing device, steam boiler, Steam explosive machine, blanking bin, vacuum apparatus, coal washing plant, handling equipment and PLC intelligent controller, wherein vacuum apparatus comprises vacuum pump and condensation division box, and described handling equipment comprises air compressor machine, connects the pipeline of each equipment, and the raw coal charging switch that pipeline is arranged, steam cock and blanking switch, described raw coal mixing device is connected to Steam explosive machine by discharge plate, described steam boiler vapour outlet connects the admission opening bottom Steam explosive machine by steam-pipe, blanking hole bottom Steam explosive machine is connected to the top of blanking bin by blanking pipe, described blanking bin bottom is provided with discharge port, top is provided with vapor pipe, described discharge port connects coal washing plant, described vapor pipe is connected with the suction hole of vacuum pump by gas exhaust duct, the production well of described vacuum pump is connected to the top of condensation division box by outlet pipe, condensation division box top is provided with venting port, bottom is provided with relief hole.
2. the equipment utilizing the coal desulfurization before combustion of Steam explosive machine and extraction agent according to claim 1, it is characterized in that: charging tray is connected to Steam explosive machine top, discharge plate offers 4 ~ 16 feed ports, accordingly, described Steam explosive machine inside is divided into 4 ~ 16 relatively independent steam-explosion jars, each steam-explosion jar top is provided with feed-pipe, and described feed port and feed-pipe are with the use of completing charging; Be respectively equipped with admission opening and blanking hole bottom each steam-explosion jar, each feed-pipe, admission opening and blanking hole are respectively equipped with raw coal charging switch, steam cock and blanking switch; The raw coal charging switch of each steam-explosion jar, steam cock and blanking switch are interlocks controlled by air compressor cylinder, can realize locking simultaneously.
3. the equipment utilizing the coal desulfurization before combustion of Steam explosive machine and extraction agent according to claim 2, is characterized in that: more excellent, described discharge plate offers 10 feed ports, and described Steam explosive machine inside is divided into 10 relatively independent steam-explosion jars.
4. the equipment utilizing the coal desulfurization before combustion of Steam explosive machine and extraction agent according to claim 2, it is characterized in that: the blanking hole of each steam-explosion jar described is connected to same blanking pipe, described blanking pipe diameter is 240 ~ 300mm.
5. the method utilizing the coal desulfurization before combustion of Steam explosive machine and extraction agent according to claim 1,2,3 or 4, is characterized in that comprising the following steps:
(1) raw coal fully mixes with alkaline extraction liquid in raw coal mixing device, then enters discharge plate, the feed port charging in turn one by one of described discharge plate;
(2) opening steam cock after completing charging starts into steam, enter steam complete after air compressor machine cylinder control raw coal charging switch, steam cock and blanking switch and close simultaneously, open blanking switch after dimension pressure 3 ~ 10min and start blanking;
(3) after the raw coal that the quick-fried extraction treatment of vapour is crossed enters blanking bin together with steam, gas is wherein drawn into condensation division box from the vapor pipe at top by vacuum pump, get rid of from the relief hole of condensation division box bottom after water vapor condensation, non-condensable gases is discharged from top vent; Liquid in blanking bin, solid two-phase product enter coal washing plant by discharge port, and wash, now in raw coal, insoluble sulfocompound becomes water miscible sulfocompound, fractionate aqueous solutions and raw coal after washing.
6. the method utilizing the coal desulfurization before combustion of Steam explosive machine and extraction agent according to claim 5, it is characterized in that: in described step (1), alkaline extraction liquid is the saturated NaOH aqueous solution under normal temperature, and the mass ratio of alkaline extraction liquid and raw coal is 0.3 ~ 0.7:1.
7. the method utilizing the coal desulfurization before combustion of Steam explosive machine and extraction agent according to claim 5, it is characterized in that: in described step (2), the mass ratio of steam consumption and raw coal is 0.3 ~ 0.6:1, and raw coal is with being steam heated to 180 ~ 235 DEG C, more excellent, the dimension pressure time is 5min.
8. the method utilizing the coal desulfurization before combustion of Steam explosive machine and extraction agent according to claim 5, is characterized in that: in described step (3), the rate of air sucked in required of vacuum pump is 200 ~ 250t/h.
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| CN114517116A (en) * | 2022-02-14 | 2022-05-20 | 三门峡市精捷自动化设备有限公司 | Low-volatile coal body thermal steaming and cold quenching process |
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