CN104964302A - Direct-blowing pulverizing system with coal drying function and water recycling function - Google Patents
Direct-blowing pulverizing system with coal drying function and water recycling function Download PDFInfo
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- CN104964302A CN104964302A CN201510320812.9A CN201510320812A CN104964302A CN 104964302 A CN104964302 A CN 104964302A CN 201510320812 A CN201510320812 A CN 201510320812A CN 104964302 A CN104964302 A CN 104964302A
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Abstract
The invention discloses a direct-blowing pulverizing system with the coal drying function and the water recycling function. The system comprises a water recycling sub-system and a pulverizing sub-system. The water recycling sub-system comprises a coal bunker, a dryer, a water recycling heat exchanger and a forming machine, wherein the dryer comprises a dryer coal inlet, a dryer gas outlet and a dryer solid outlet; the dryer coal inlet is communicated with the outlet of the coal bunker; the water recycling heat exchanger is communicated with the dryer gas outlet; the forming machine comprises a forming machine feed inlet and a forming machine discharge opening; the forming machine feed inlet is communicated with the dryer solid outlet. The pulverizing sub-system comprises a medium-speed mill direct-blowing pulverizing device. The water recycling sub-system and the pulverizing sub-system are combined, and a high-pressure forming module is introduced for deep drying. The quality of coal is improved before the coal enters a furnace, the combustion stability of a hearth is improved, water in brown coal is recycled, and the aim of saving water resources is achieved. The dried coal can be transported and stored remotely, and natural hidden hazards are reduced.
Description
Technical field
The invention belongs to electric power energy technical field, particularly relate to a kind of unit pulverized-coal system with coal drying and Water Sproading function.
Background technology
The pulverized coal preparation system of industrial use can be divided into two classes: traditional enclosed brown coal pulverized coal preparation system and open type pulverized coal preparation system.Enclosed pulverized coal preparation system refer to draw from coal pulverizer through mill separator the gas carrying qualified fineness coal dust, powder two-phase fluid as First air, be directly blown into the pulverized coal preparation system of burner hearth via burner.Large-scale boiler using brown coal is for safe powder process and the consideration reducing coal-grinding power consumption, generally select fan mill or medium-speed milling pulverization system, no matter be the enclosed pulverized coal preparation system that medium-speed pulverizer pressurized direct pulverizing coal system or blower mill unit pulverized-coal system all belong to traditional, having common shortcoming is when combusting brown coal, be no matter First air containing a large amount of inertia flue gases and water vapour or the tertiary air weary for powder process gas blowout being entered burner hearth, all can cause burner hearth smooth combustion and have a strong impact on.Weary gas after open type pulverized coal preparation system refers in pulverized coal preparation system and isolates coal dust does not enter burner hearth, and is discharged into the pulverized coal preparation system in the flue before air or air-introduced machine after being through bag-type dust.
The eastern area of Inner Mongolia that China's brown coal are concentrated the most is typical " rich coal lack of water " area, and water resources shortage seriously constrains local power supply construction of base and economic development.Many research is in recent years reclaimed for boiler exhaust gas UTILIZATION OF VESIDUAL HEAT IN and steam.Bituminous coal fired boiler flue gas water dew point is at about 40 DEG C, and for the boiler using brown coal flue gas water dew point containing a large amount of steam also only at about 55 DEG C, but general boiler discharging flue gas acid dew point is then more than 80 DEG C.Therefore, although water content is huge in flue gas, by heat exchanger materials corrosion restriction, smoke discharging residual heat utilizes the part sensible heat only reclaimed in flue gas, and moisture does not then reclaim substantially.But, in high water content brown coal boiler open type pulverized coal preparation system, overwhelming majority raw coal moisture is evaporated in powder process dry run, a large amount of water vapour is enriched with in dry exhaust steam, exhaust steam water dew point up to about 75 DEG C and hardly acid gas-containing, make a large amount of brown coal drying water of recovery become possibility, environmental benefit is remarkable.
Summary of the invention
The object of this invention is to provide a kind of unit pulverized-coal system with coal drying and Water Sproading function, be not recovered in pulverizing process with the moisture solved in coal raw material, the technical problem of water resource waste.
The technical scheme that the present invention solves the problems of the technologies described above is as follows: a kind of unit pulverized-coal system with coal drying and Water Sproading function, is made up of Water Sproading subsystem and powder process subsystem;
Described Water Sproading subsystem comprises:
Coal bunker, described coal bunker comprises coal bunker outlet, and coal bunker is for loading coal raw material;
Drying machine, described drying machine comprises drying machine coal feed point, drying machine gas vent, drying machine solid outlet; Drying machine coal feed point and coal bunker export to be connected;
Water Sproading heat exchanger, described Water Sproading heat exchanger and drying machine gas vent are connected, for being made the condensate moisture in the weary steam of self-desiccation machine gas vent in the future by cooling medium and reclaiming;
Forming machine, described forming machine comprises forming machine charging aperture and forming machine discharging opening; Forming machine charging aperture and described drying machine solid outlet are connected;
Described powder process subsystem comprises medium-speed pulverizer blowing powder producing equipment, and for future, the moulded coal of self-forming machine discharging opening is processed into coal dust and coal dust is blown into boiler;
Described Water Sproading subsystem is arranged in the first building, and powder process subsystem is arranged in the second building; Realized the transhipment of moulded coal by belt feeder between first building and the second building.
The present invention has the unit pulverized-coal system of coal drying and Water Sproading function as above, and further, described Water Sproading subsystem also comprises deduster, dedusting air-introduced machine and chimney; Described deduster is arranged between described drying machine gas vent and Water Sproading heat exchanger; Described dedusting air-introduced machine is arranged on the gas outlet of described Water Sproading heat exchanger; Described chimney is communicated with dedusting air-introduced machine.
The present invention has the unit pulverized-coal system of coal drying and Water Sproading function as above, further, described Water Sproading heat exchanger comprises one-level Water Sproading heat exchanger and secondary Water Sproading heat exchanger, and described one-level Water Sproading heat exchanger and secondary Water Sproading heat exchanger are connected in series.
The present invention has the unit pulverized-coal system of coal drying and Water Sproading function as above, further, passes into the cooling medium of the first temperature, pass into the cooling medium of the second temperature in secondary Water Sproading heat exchanger in described one-level Water Sproading heat exchanger.
The present invention has the unit pulverized-coal system of coal drying and Water Sproading function as above, and further, described coal raw material is the precrushing brown coal of particle diameter <20mm; Described forming machine is high-pressure forming machine, and linear pressure can reach 29 MPa/cm.
The present invention has the unit pulverized-coal system of coal drying and Water Sproading function as above, and further, described powder process subsystem comprises:
Mill separator, described mill separator comprises mill separator charging aperture and mill separator discharge;
Medium-speed pulverizer, described medium-speed pulverizer comprises medium-speed pulverizer charging aperture, medium-speed pulverizer First air air inlet, medium-speed pulverizer sealing air air inlet; Mill separator discharge and medium-speed pulverizer charging aperture are interconnected;
Feeder, moulded coal is sent to mill separator charging aperture by described feeder;
Boiler, to mix with coal dust at described pot furnace air and carries out Thorough combustion;
Air preheater, described air preheater is arranged on described boiler;
Burner, described burner comprises burner inlet and burner outlet; Burner outlet is communicated with the entrance of boiler;
Pulverized coal distributor and isolation door, described mill separator discharge, pulverized coal distributor, isolation door are communicated with successively with burner inlet;
Pressure fan, it is combustion-supporting that the Secondary Air that described pressure fan exports enters burner inlet after air preheater heating;
Primary air fan, the wind that described primary air fan exports enters medium-speed pulverizer air inlet after air preheater heating.
The present invention has the unit pulverized-coal system of coal drying and Water Sproading function as above, and further, also comprise conveyer, the moulded coal of forming machine discharging opening is delivered to feeder by described conveyer.
The present invention has the unit pulverized-coal system of coal drying and Water Sproading function as above, and further, described powder process subsystem also comprises secondary air box, and described secondary air box is connected with burner inlet, poor for regulating stove gun pressure.
The present invention has the unit pulverized-coal system of coal drying and Water Sproading function as above, and further, described powder process subsystem also comprises deduster and air-introduced machine, and the entrance of deduster is communicated with the exhanst gas outlet of boiler, and outlet is communicated with described air-introduced machine.
The present invention has the unit pulverized-coal system of coal drying and Water Sproading function as above, and further, described powder process subsystem also comprises seal fan, and described seal fan is communicated with medium-speed pulverizer, for anti-leak-stopping powder.
The invention has the beneficial effects as follows:
The invention discloses a kind of waste heat saturated vapor that adopts and carry out low-order coal contact drying, Water Sproading and shaping medium-speed pulverizer unit pulverized-coal system, this process system combines drying water and reclaims shaping and medium-speed pulverizer blowing powder producing two kinds of techniques, golf calorific value, low-moisture shaping and drying product of coal can be obtained, realize the dry powder process of brown coal as fired fuel, not only can improve into stokehold ature of coal, improve the stability of hearth combustion, the water of recovery can recycle, and reaches the object of saving water resource.Meanwhile, the program effectively can make up the shortcoming of medium-speed pulverizer drying capacity deficiency, and take powder medium without the need to using the heat primary air of higher temperature, system can use traditional bituminous coal medium-speed pulverizer and bituminous coal fired boiler, the former boiler using brown coal of a large amount of saving and pulverized coal preparation system investment.Special when drying system by brown coal drying to atmospheric equilibrium moisture operating mode time, native system takes powder gas oxygen content without the need to using cold smoke blower fan to reduce, directly use heat primary air, and guarantee process safety also saves operating cost.
1, drying process of the present invention can realize depth drying, and below brown coal drying to 5% moisture, moisture-free coal is molded by high pressure roller, can not relapse, greatly convenient storage and transport.
2, drying equipment of the present invention is separated completely with power plant original pulverized coal preparation system, and main coal bunker is still arranged at main building bunker bay.Dry moulded coal falls into main coal bunker, and stable in properties, not easily there is spontaneous combustion, effectively reduce coal bunker volume.Depth drying moulded coal can continue to reduce pulverized coal preparation system and exert oneself, and increases boiler combustion efficiency, reduces operating cost.
3, forming Type Coal transloading equipment of the present invention is without the need to using closed conveying equipment, uses conventional belt conveyer, reduces equipment investment.
4, the character of dry moulded coal safety and stability of the present invention can make dry island position more flexible, and convenient enlarging power plant always schemes to arrange.
Accompanying drawing explanation
By detailed description done in conjunction with the following drawings, above-mentioned and/or other aspects of the present invention and advantage will become clearer and be easier to understand, and these accompanying drawings just schematically, do not limit the present invention, wherein:
Fig. 1 is the unit pulverized-coal system overall schematic with coal drying and Water Sproading function of an embodiment of the present invention;
Fig. 2 is the Water Sproading subsystem schematic diagram of an embodiment of the present invention;
Fig. 3 is the powder process subsystem schematic diagram of an embodiment of the present invention.
In accompanying drawing, the list of parts representated by each label is as follows:
10, Water Sproading subsystem, 11, coal bunker, 12, drying machine, 13, Water Sproading heat exchanger, 131, one-level Water Sproading heat exchanger, 132, secondary Water Sproading heat exchanger, 14, forming machine, 15, deduster, 16, dedusting air-introduced machine, 17, chimney, 20, powder process subsystem, 21, mill separator, 22, medium-speed pulverizer, 23, feeder, 24, boiler, 25, air preheater, 26, burner, 27, pulverized coal distributor, 28, isolation door, 29, pressure fan, 31, primary air fan, 32, conveyer, 33, secondary air box, 34, deduster, 35, air-introduced machine, 36, seal fan, 37, apparatus for measuring air quantity, 4, first building, 5, second building.
Detailed description of the invention
Hereinafter, the embodiment with the unit pulverized-coal system of coal drying and Water Sproading function of the present invention is described with reference to the accompanying drawings.
The embodiment recorded at this is specific detailed description of the invention of the present invention, for illustration of design of the present invention, is all explanatory and exemplary, should not be construed as the restriction to embodiment of the present invention and the scope of the invention.Except the embodiment recorded at this, those skilled in the art can also adopt other technical scheme apparent based on the content disclosed in the application's claims and description, and these technical schemes comprise the technical scheme making any apparent substitutions and modifications adopted the embodiment recorded at this.
The accompanying drawing of this description is schematic diagram, and aid illustration design of the present invention schematically shows shape and the correlation thereof of each several part.Note that the structure of each parts for the ease of clearly showing the embodiment of the present invention, not according to identical scale between each accompanying drawing.Identical reference marker is for representing identical part.
Fig. 1 illustrates the unit pulverized-coal system with coal drying and Water Sproading function of an embodiment of the present invention, is made up of Water Sproading subsystem 10 and powder process subsystem 20;
Described Water Sproading subsystem 10 comprises:
Coal bunker 11, described coal bunker comprises coal bunker outlet, and coal bunker is for loading coal raw material;
Drying machine 12, described drying machine comprises drying machine coal feed point, drying machine gas vent, drying machine solid outlet; Drying machine coal feed point and coal bunker export to be connected;
Water Sproading heat exchanger 13, described Water Sproading heat exchanger and drying machine gas vent are connected, for being made the condensate moisture in the weary steam of self-desiccation machine gas vent in the future by cooling medium and reclaiming;
Forming machine 14, described forming machine comprises forming machine charging aperture and forming machine discharging opening; Forming machine charging aperture and described drying machine solid outlet are connected;
Described powder process subsystem 20 comprises medium-speed pulverizer blowing powder producing equipment, and for future, the moulded coal of self-forming machine discharging opening is processed into coal dust and coal dust is blown into boiler;
Described Water Sproading subsystem 10 is arranged in the first building 4, and powder process subsystem 20 is arranged in the second building 5; Realized the transhipment of moulded coal by belt feeder 32 between first building and the second building.
The course of work with the unit pulverized-coal system of coal drying and Water Sproading function of the above embodiment of the present invention is as follows: coal bunker sent into by coal raw material, after drying machine drying, enters forming machine and is processed into moulded coal.Moulded coal is transported to powder process subsystem by belt feeder subsequently, enters medium-speed pulverizer, grind qualified coal dust through First air carry be blown into boiler participate in combustion reaction.In addition, brown coal are after drying machine drying, and weary steam (described weary steam refers to the mixture of the steam that moisture in brown coal is formed by thermal evaporation in drying machine and air, and its temperature is about 120 DEG C, namely preferred at 110-130 DEG C) is discharged from drying machine gas vent.Subsequently, weary steam enters Water Sproading heat exchanger and carries out cooling and dehumidifying, and condensed water is recovered utilization, and the saving achieving water resource utilizes.
Be arranged on by Water Sproading subsystem in the first building, powder process subsystem is arranged in the second building and achieves Water Sproading subsystem and be separated completely with powder process subsystem, and such as described first building is main building, and coal bunker is arranged at main building bunker bay; Dry moulded coal falls into coal bunker, and stable in properties, not easily there is spontaneous combustion, effectively reduce coal bunker volume.In addition, depth drying moulded coal can continue to reduce pulverized coal preparation system and exert oneself, and increases boiler combustion efficiency, reduces operating cost.
The structure of medium-speed pulverizer itself determines the entrance desiccant temperature that it uses lower than 400 DEG C, and can only require volatile matter V according to " thermal power plant pulverized coal preparation system designing and calculating technical stipulation "
dafcoal temperature < 70 DEG C after medium-speed pulverizer blowing powder producing separator of>=40%, therefore medium-speed pulverizer drying capacity is restricted.Coal dust of the present invention obtains abundant drying in Water Sproading subsystem, greatly alleviates medium-speed pulverizer drying pressure, and take powder medium without the need to using the heat primary air of higher temperature, security performance is highly improved; System can use traditional bituminous coal medium-speed pulverizer and bituminous coal fired boiler, the former boiler using brown coal of a large amount of saving and pulverized coal preparation system investment.
This system core equipment is steam pipe type drier, adopt the low-pressure steam indirect drying brown coals such as residual heat of electric power plant steam, auxiliary steam, heat source stream maximum pressure is 0.5MPa(g) saturated vapor, heat source temperature lower (<160 DEG C), brown coal dehydration rate reaches as high as more than 90% and pyrolytic reaction can not occur.In addition, dry run is little on the impact of ature of coal volatile matter, even if to make First air enter fire box temperature lower for therefore higher volatile matter, also there will not be the phenomenon of catch fire postponement and unstable combustion.
The coal unit pulverized-coal system that is dry and Water Sproading function that has of the above embodiment of the present invention can also be improved further, and described Water Sproading subsystem 10 also comprises deduster 15, dedusting air-introduced machine 16 and chimney 17; Described deduster is arranged between described drying machine gas vent and Water Sproading heat exchanger; Described dedusting air-introduced machine is arranged on the gas outlet of described Water Sproading heat exchanger; Described chimney is communicated with dedusting air-introduced machine.
When above-described embodiment has the unit pulverized-coal system use of coal drying and Water Sproading function, by accurately controlling drying machine intake air amount (this air is for carrying the moisture in coal raw material), ensure the oxygen content that the weary steam of whole dry run is lower, avoid dry coal dust, in drying machine or in weary Steam Dust device, spontaneous combustion occurs.
The coal unit pulverized-coal system that is dry and Water Sproading function that has of the above embodiment of the present invention can also be improved further, described Water Sproading heat exchanger 13 comprises one-level Water Sproading heat exchanger 131 and secondary Water Sproading heat exchanger 132, and described one-level Water Sproading heat exchanger and secondary Water Sproading heat exchanger are connected in series.Pass into the cooling medium of the first temperature in described one-level Water Sproading heat exchanger, in secondary Water Sproading heat exchanger, pass into the cooling medium of the second temperature.
Two-stage Water Sproading heat-exchanger rig can use the cooling medium of different temperatures grade, the reasonable cascade utilization energy, by water vapour cooling condensation in dry exhaust steam, reclaims brown coal drying water.
The coal unit pulverized-coal system that is dry and Water Sproading function that has of the above embodiment of the present invention can also be improved further, and described coal raw material is the precrushing brown coal of particle diameter <20mm; Described forming machine is high-pressure forming machine, and linear pressure can reach 29 MPa/cm.
The linear pressure of high-pressure forming machine can reach 29 MPa/cm, the original spatial hole gap structure in inside of shaping moisture-free coal changes under suppressing, shelve for a long time in atmosphere and obvious moisture can not occur relapse, thus eliminate there is spontaneous combustion hidden danger because moisture relapses heat release, greatly increase briquette prod store and transportation in security and economy.
Having in the unit pulverized-coal system of coal drying and Water Sproading function of the above embodiment of the present invention, described powder process subsystem 20 comprises:
Mill separator 21, described mill separator comprises mill separator charging aperture and mill separator discharge;
Medium-speed pulverizer 22, described medium-speed pulverizer comprises medium-speed pulverizer charging aperture, medium-speed pulverizer First air air inlet, medium-speed pulverizer sealing air air inlet; Mill separator discharge and medium-speed pulverizer charging aperture are interconnected;
Feeder 23, moulded coal is sent to mill separator charging aperture by described feeder;
Boiler 24, to mix with coal dust at described pot furnace air and carries out Thorough combustion;
Air preheater 25, described air preheater is arranged on described boiler;
Burner 26, described burner comprises burner inlet and burner outlet; Burner outlet is communicated with the entrance of boiler;
Pulverized coal distributor 27 and isolation door 28, described mill separator discharge, pulverized coal distributor, isolation door are communicated with successively with burner inlet;
Pressure fan 29, it is combustion-supporting that the Secondary Air that described pressure fan exports enters burner inlet after air preheater heating;
Primary air fan 31, the wind that described primary air fan exports enters medium-speed pulverizer air inlet after air preheater heating.
The coal unit pulverized-coal system that is dry and Water Sproading function that has of the above embodiment of the present invention can also be improved further, and also comprise conveyer 32, the moulded coal of forming machine discharging opening is delivered to feeder by described conveyer.
The coal unit pulverized-coal system that is dry and Water Sproading function that has of the above embodiment of the present invention can also be improved further, and described powder process subsystem also comprises secondary air box 33, and described secondary air box is connected with burner inlet, poor for regulating stove gun pressure.
The coal unit pulverized-coal system that is dry and Water Sproading function that has of the above embodiment of the present invention can also be improved further, described powder process subsystem also comprises deduster 34 and air-introduced machine 35, the entrance of deduster is communicated with the exhanst gas outlet of boiler, and outlet is communicated with described air-introduced machine.
The coal unit pulverized-coal system that is dry and Water Sproading function that has of the above embodiment of the present invention can also be improved further, and described powder process subsystem also comprises seal fan 36, and described seal fan is communicated with medium-speed pulverizer, for anti-leak-stopping powder.In a more preferred embodiment, described powder process subsystem also comprises apparatus for measuring air quantity 37, and described apparatus for measuring air quantity is arranged on medium-speed pulverizer air inlet, for measuring air quantity.
The course of work with the unit pulverized-coal system of coal drying and Water Sproading function of the preferred embodiment of the present invention is as follows: the precrushing brown coal of particle diameter <20mm send into coal bunker, after drying machine drying, enter forming machine, press to moulded coal through binder free high pressure roller.Moulded coal is through mill separator and medium-speed pulverizer subsequently, and coal dust is blown into boiler and participates in combustion reaction.In addition, brown coal are after drying machine is dried, weary steam (described weary steam refers to the mixture of the steam that moisture in brown coal is formed by thermal evaporation in drying machine and air, and its temperature is about 120 DEG C, namely preferred at 110-130 DEG C) is discharged from drying machine gas vent.This pipeline sets up negative pressure by the dedusting air-introduced machine after Water Sproading heat exchanger, and weary steam is with a large amount of coal dust, and after deduster, most of coal dust, by filtering, falls into bottom deduster, sends into medium-speed pulverizer in the lump, then recycle.Weary steam after filtration enters Water Sproading heat exchanger (successively by one-level Water Sproading heat exchanger and secondary Water Sproading heat exchanger) and carries out cooling and dehumidifying, and condensed water is recovered utilization, and the saving achieving water resource utilizes.The gradable refrigerant utilizing different temperatures in system of twin-stage Water Sproading heat-exchanger rig, thus realize the classified utilization of energy, Water Sproading rate can reach more than 50%.Fixed gas in weary steam is extracted out by dedusting air-introduced machine, drains into air after treatment eventually through chimney.
Each technical characteristic of above-mentioned disclosure is not limited to that disclosed with combination that is further feature, other combination that those skilled in the art also can carry out between each technical characteristic according to the object of invention, is as the criterion with the object realizing the present invention.
Claims (10)
1. there is a unit pulverized-coal system for coal drying and Water Sproading function, be made up of Water Sproading subsystem and powder process subsystem; It is characterized in that:
Described Water Sproading subsystem comprises:
Coal bunker, described coal bunker comprises coal bunker outlet, and coal bunker is for loading coal raw material;
Drying machine, described drying machine comprises drying machine coal feed point, drying machine gas vent, drying machine solid outlet; Drying machine coal feed point and coal bunker export to be connected;
Water Sproading heat exchanger, described Water Sproading heat exchanger and drying machine gas vent are connected, for being made the condensate moisture in the weary steam of self-desiccation machine gas vent in the future by cooling medium and reclaiming;
Forming machine, described forming machine comprises forming machine charging aperture and forming machine discharging opening; Forming machine charging aperture and described drying machine solid outlet are connected;
Described powder process subsystem comprises medium-speed pulverizer blowing powder producing equipment, and for future, the moulded coal of self-forming machine discharging opening is processed into coal dust and coal dust is blown into boiler;
Described Water Sproading subsystem is arranged in the first building, and powder process subsystem is arranged in the second building; Realized the transhipment of moulded coal by belt feeder between first building and the second building.
2. the unit pulverized-coal system with coal drying and Water Sproading function according to claim 1, it is characterized in that, described Water Sproading subsystem also comprises deduster, dedusting air-introduced machine and chimney; Described deduster is arranged between described drying machine gas vent and Water Sproading heat exchanger; Described dedusting air-introduced machine is arranged on the gas outlet of described Water Sproading heat exchanger; Described chimney is communicated with dedusting air-introduced machine.
3. the unit pulverized-coal system with coal drying and Water Sproading function according to claim 2, it is characterized in that, described Water Sproading heat exchanger comprises one-level Water Sproading heat exchanger and secondary Water Sproading heat exchanger, and described one-level Water Sproading heat exchanger and secondary Water Sproading heat exchanger are connected in series.
4. the unit pulverized-coal system with coal drying and Water Sproading function according to claim 3, is characterized in that, pass into the cooling medium of the first temperature, pass into the cooling medium of the second temperature in secondary Water Sproading heat exchanger in described one-level Water Sproading heat exchanger.
5. the unit pulverized-coal system with coal drying and Water Sproading function according to claim 4, it is characterized in that, described coal raw material is the precrushing brown coal of particle diameter <20mm; Described forming machine is high-pressure forming machine, and linear pressure can reach 29 MPa/cm.
6. the unit pulverized-coal system with coal drying and Water Sproading function according to any one of claim 1-5, it is characterized in that, described powder process subsystem comprises:
Mill separator, described mill separator comprises mill separator charging aperture and mill separator discharge;
Medium-speed pulverizer, described medium-speed pulverizer comprises medium-speed pulverizer charging aperture, medium-speed pulverizer First air air inlet, medium-speed pulverizer sealing air air inlet; Mill separator discharge and medium-speed pulverizer charging aperture are interconnected;
Feeder, moulded coal is sent to mill separator charging aperture by described feeder;
Boiler, to mix with coal dust at described pot furnace air and carries out Thorough combustion;
Air preheater, described air preheater is arranged on described boiler;
Burner, described burner comprises burner inlet and burner outlet; Burner outlet is communicated with the entrance of boiler;
Pulverized coal distributor and isolation door, described mill separator discharge, pulverized coal distributor, isolation door are communicated with successively with burner inlet;
Pressure fan, it is combustion-supporting that the Secondary Air that described pressure fan exports enters burner inlet after air preheater heating;
Primary air fan, the wind that described primary air fan exports enters medium-speed pulverizer air inlet after air preheater heating.
7. the unit pulverized-coal system with coal drying and Water Sproading function according to claim 6, it is characterized in that, also comprise conveyer, the moulded coal of forming machine discharging opening is delivered to feeder by described conveyer.
8. the unit pulverized-coal system with coal drying and Water Sproading function according to claim 6, it is characterized in that, described powder process subsystem also comprises secondary air box, and described secondary air box is connected with burner inlet, poor for regulating stove gun pressure.
9. the unit pulverized-coal system with coal drying and Water Sproading function according to claim 6, it is characterized in that, described powder process subsystem also comprises deduster and air-introduced machine, and the entrance of deduster is communicated with the exhanst gas outlet of boiler, and outlet is communicated with described air-introduced machine.
10. the unit pulverized-coal system with coal drying and Water Sproading function according to claim 6, it is characterized in that, described powder process subsystem also comprises seal fan, and described seal fan is communicated with medium-speed pulverizer, for anti-leak-stopping powder.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109439378A (en) * | 2018-12-26 | 2019-03-08 | 北京国电龙源环保工程有限公司 | The upgrading system and method for upgrading of low-order coal pulverized coal forming are carried out using waste heat flue gas |
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