CN202132965U - Fuel-gas drying direct-firing pulverizing system with lignite-fired fanlike coal pulverizer - Google Patents
Fuel-gas drying direct-firing pulverizing system with lignite-fired fanlike coal pulverizer Download PDFInfo
- Publication number
- CN202132965U CN202132965U CN201120256092U CN201120256092U CN202132965U CN 202132965 U CN202132965 U CN 202132965U CN 201120256092 U CN201120256092 U CN 201120256092U CN 201120256092 U CN201120256092 U CN 201120256092U CN 202132965 U CN202132965 U CN 202132965U
- Authority
- CN
- China
- Prior art keywords
- coal
- flue gas
- hot
- boiler
- pulverized coal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
Links
Images
Landscapes
- Disintegrating Or Milling (AREA)
Abstract
The utility model discloses a fuel-gas drying direct-firing pulverizing system with a lignite-fired fanlike coal pulverizer. The fuel-gas drying direct-firing pulverizing system further comprises a high-temperature fuel gas pipeline and a hot-air mixer, wherein the high-temperature fuel gas duct is a fuel duct formed by parallelly encircling a bundle of round tubes; the round tubes are positioned in a steamwater circulating system of a power plant; the outlet of the high-temperature fuel gas duct is communicated with a downlink drying tube, and the inlet is communicated with a hot-smoke pumping port of the hearth of a boiler; the hot-air mixer is connected between a coarse powder separator and a coal powder distributor, and the other path of the hot-air plant is connected to the hot-air mixer; and the coal inlet of the fanlike coal pulverizer is connected to a cold-smoke pumping port of the flue duct of the boiler. The fuel-gas drying direct-firing pulverizing system with the lignite-fired fanlike coal pulverizer has the advantages of safety in operation, simple structure, less investment, and capability of fully and effectively utilizing the high-quality flue gas heat energy.
Description
Technical field
The utility model belongs to the coal fired power generation technical field, relates to the brown coal generation technology, specifically, relates to the pulverized coal preparation system and the combustion system of combustion brown coal station boiler.
Background technology
Brown coal are the minimum pit coals of degree of coalification, are peat depositions after dehydration, compacting change the initial stage product of organic-biological rock into, because of appearance is brown or crineous is gained the name.Brown coal account for 18% of China's thermal coal reserves, mainly are distributed in areas such as the Inner Mongol, northeast and Yunnan.Brown coal have characteristics such as volatile matter height (Vdaf＞37%), moisture high (total moisture is about 30%, and free moisture surpasses 19% mostly), caloric value low (about 12.56MJ/kg), ash fusion point low (about 1150 ℃), low (HGI is 50-70) of abrasiveness and easy spontaneous combustion.The characteristics of brown coal " two Senior Three are low " have determined that its pulverized coal preparation system has certain particularity.
In the station boiler pulverized coal preparation system, the difference of the maximum of all kinds of pulverized coal preparation systems is the coal pulverizer type.Coal pulverizer is a disintegrating apparatus in pulverized coal preparation system, also is crucial raw coal drying equipment.The coal pulverizer of widely using at present mainly contains low speed coal mill, medium-speed pulverizer and blower mill three major types.The coal pulverizer type selecting is main relevant with former moisture content of coal, grindability and abrasiveness.Because of most of brown coal moisture higher and abrasiveness a little less than, so in current combustion brown coal unit the stronger blower mill unit pulverized-coal system of extensive use drying capacity.According to the difference of drying medium, the direct feed pulverized coal-fan mill pulverized coal preparation system also can be divided into second medium (hot blast and hot cigarette) and three media (hot blast, hot cigarette and cold smoke) drying system.
No matter second medium still is three medium systems, and drier mixes by flue gas and air.Therefore it is higher to contain oxygen in the drying medium, be prone to make in the pulverized coal preparation system catch fire, accident such as detonation, be the subject matter that influences the safe operation of brown coal pulverized coal preparation system.
In addition, present high temperature boiler flue gas tube road adopts two kinds of structural shapes of interior insulation and outer insulation.In service in its reality, heat-insulation layer comes off and causes the accident that pipeline liner plate and expansion joint burn to happen occasionally, and the pipe safety reliability is relatively poor, for a long time the safe and stable operation of the brown coal of influence combustion always generating set.In addition; The high temperature furnace cigarette temperature of furnace outlet is up to more than 1000 degree; Many more than 350mm for reducing insulation in the radiation loss in the past or being incubated the insulation layer thickness in high temperature boiler flue gas tube road outward, need to consume a large amount of insulation materials thus on the one hand and lot of manpower and material resources is used for construction, also make pipeline weight very big simultaneously; Correspondingly make the load of unit steel construction system bigger, steel consumption increases thereupon.In the insulation construction, the pipe lining plate adopts a large amount of heat-resisting alloy steels outside, also makes the pipeline investment obviously increase.Therefore, there is the outstanding problem that initial cost is excessive, safety in operation is poor, maintenance cost is bigger in the high temperature boiler flue gas tube road of interior in the past insulation or outer insulation construction pattern.
Also have, in fan mill brown coal pulverized coal preparation system, spend up to more than 1000, in the boiler heating power system, belong to high-quality heat energy from the high temperature furnace cigarette temperature that furnace outlet extracts.Ventilate and dry integration requirement according to blower mill, required drier initial temperature is generally 600-800 ℃ of scope.Second medium in the past and three medium drying systems are provided with mixing chamber at the burner hearth mouthful place of smoking mostly, in the mixing chamber high-temperature flue gas with hot blast (or hot blast and cold smoke) thus mix the mist temperature reduced to the required drier initial temperature of fuel pulverized coal preparation system.This is actually and utilizes the high-quality flue gas heating part low temperature drying agent of degree more than 1000 to be used for pulverized coal preparation system.These a large amount of high-grade flue gas heat energy that make boiler combustion produce fail to be used to heat the water or the steam of unit acting generating, cause unit efficiency to reduce.And in stove, directly extract 600-800 ℃ moderate oven cigarette, though feasible in theory, in actual engineering, there are reality difficulties such as pipe arrangement inconvenience.
In sum, can know in the present station boiler drying and powder process that the second medium widely used and three medium brown coal pulverized coal preparation systems all are conceived to the high-moisture brown coal, fail effectively to solve the safety problem of brown coal pulverized coal preparation system.And outstanding problem big, the operational reliability difference is invested in the high temperature boiler flue gas tube road existence of insulation or outer insulation construction in adopting in the fanned powder-grinding system.
The utility model content
The utility model technical problem to be solved provides a kind of security of operation, simple in structure, little, the flue gas drying brown coal direct feed pulverized coal-fan mill pulverized coal preparation system that can fully effectively utilize high-quality flue gas heat energy of investment, to overcome the deficiency that prior art exists.
For solving the problems of the technologies described above, the utility model adopts following technical scheme:
A kind of flue gas drying brown coal direct feed pulverized coal-fan mill pulverized coal preparation system; Comprise blower mill; Be connected the preceding descending drying tube of blower mill; Outlet is communicated to stove smoke pipe road that the import of descending drying tube and hot cigarette that import is communicated to boiler furnace take out mouthful, be linked in sequence mill separator, pulverized coal distributor behind blower mill, and hot air apparatus; Said pulverized coal distributor is connected to the burner of boiler, and said hot air apparatus divides two-way, and one the tunnel connects burner; It is characterized in that: also include high temperature boiler flue gas tube road and hot air mixer; Said high temperature boiler flue gas tube road surrounds flue by cluster pipe parallel arranged and constitutes; Said pipe is arranged in the steam-water circulation system of power plant, and the outlet in said high temperature boiler flue gas tube road is communicated to that hot cigarette that descending drying tube, import be communicated to boiler furnace is taken out mouthful, said hot air mixer is connected between mill separator and the pulverized coal distributor and another road of hot air apparatus is connected to this hot air mixer; The coal feed point of blower mill is also connected to the cold smoke of the flue of boiler and takes out mouth.
Adopt technique scheme, the utlity model has following advantage:
1, the high temperature boiler flue gas tube road links to each other with descending drying tube; Adopt the drier of high temperature furnace cigarette as the predrying process of raw coal in the descending drying tube, adopt hot cigarette that descending drying tube outlet temperature reduced with from the cold smoke mixture of boiler flue as the ventilation and the drying medium that get into coal pulverizer.Flue gas oxygen content is low, belongs to inert media.And the high-temperature flue gas oxygen content from furnace outlet is minimum, so can effectively prevent detonation in the descending drying tube.The coal pulverizer inlet feeds cold smoke; Can replenish and guarantee on the one hand before coal pulverizer, to sneak into the coal pulverizer ventilation that reduces because of the cancellation hot blast; The cold smoke temperature is low on the other hand, can guarantee the coal pulverizer inlet temperature in the scope of its safe operation, also effectively avoids the coal pulverizer inlet to catch fire simultaneously.
2, the high temperature boiler flue gas tube road surrounds formation by cluster water flowing (or vapour) pipe parallel arranged, and simple in structure, corresponding steel construction system steel consumption also is minimized, and installation is very easy, the investment is little.In addition, the pipe tube bundle of water flowing (or vapour) cooling directly contacts also heat exchange with flue gas, no longer has the burn out problems such as liner plate or expansion joint of heat-insulation layer due to coming off, and is safe and reliable to operation.
3, the high temperature boiler flue gas tube road that is surrounded by cluster water flowing (or vapour) pipe parallel arranged is that to carry the flue of high-temperature flue gas also be to be used to absorb one group of heating surface that flue gas heat energy reduces its temperature; It is used to make that high-grade flue gas heat energy is able to by the steam-water circulation system of unit acting generating, has improved unit generation efficient.
In sum, the flue gas drying brown coal direct feed pulverized coal-fan mill pulverized coal preparation system of the utility model has security of operation, simple in structure, little, the advantage that can fully effectively utilize high-quality flue gas heat energy of investment.
Description of drawings
Through the description of its exemplary embodiment being carried out below in conjunction with accompanying drawing, the above-mentioned feature and advantage of the utility model will become apparent and understand easily.
Fig. 1 is the system construction drawing of the utility model.
The specific embodiment
As shown in Figure 1; The flue gas drying brown coal fanned powder-grinding system of the utility model; Comprise former coal bunker 1, automatic scales claims 2, feeder 3, descending drying tube 4, blower mill 5, mill separator 6, pulverized coal distributor 7, burner 8, pressure fan 9,, air preheater 10, secondary wind bellows 12, high temperature boiler flue gas tube road 16, smoke duster 17, air-introduced machine 18, cold smoke blower fan 20, cold smoke pipeline 21, hot air mixer 22, cold smoke arm 23.
Wherein, former coal bunker 1 claims that through automatic scales 2 connect feeder 3, and feeder 3 is connected to the coal feed point of descending drying tube 4, and the coal outlet of descending drying tube 4 is connected to the coal feed point of blower mill 5.The coal outlet of blower mill 5 connects the coal feed point of mill separator 6; The meal outlet of mill separator 6 connects the coal feed point of low speed coal mill 6 again through powder retrieving pipe; The fine powder outlet of mill separator 6 connects hot air mixer 22; Hot air mixer 22 is connected to pulverized coal distributor 7, and pulverized coal distributor 7 is connected to the burner 8 of boiler at last.
Cold smoke take out mouth be arranged on after the boiler 13 flue tail flue gas dust removal devices 17 with air-introduced machine 18 exhaust pass on; Boiler exhaust gas divides two-way thus; One the road is connected to chimney 19, and another road is connected to the coal feed point of blower mill 5 through cold smoke blower fan 20 and cold smoke pipeline 21.
High temperature boiler flue gas tube road 16 is surrounded by cluster water flowing (or vapour) pipe parallel arranged, and its outside has the external thermal insulation of thinner thickness.The outlet in high temperature boiler flue gas tube road 16 is communicated to hot cigarette that descending drying tube 4, import be communicated to boiler 13 burner hearths and takes out mouthfuls 14.Water flowing (or vapour) pipe has cooling water (or vapour) import being positioned at high temperature boiler flue gas tube road 16 outlet sides, is positioned at hot cigarette and takes out mouthful 14 sides and have cooling water (or vapour) outlet 25.Water flowing (or vapour) pipe is connected in the steam-water circulation system of power plant.
In addition, also have cold smoke arm 23 on the cold smoke pipeline 21, this cold smoke arm 23 is communicated to the outlet in high temperature boiler flue gas tube road 16.
More than be exactly the flue gas drying brown coal steel ball powder-grinding system of the utility model, its working method is following:
The brown coal raw coal is sent into descending drying tube 4 from former coal bunker 1 through automatic balance 2 and feeder 3; Descending drying tube 4 tops with take out mouthfuls 14 and 16 carry and the high-temperature flue gas that cools mixes the also predrying process of descending completion raw coal through the high temperature boiler flue gas tube road from the hot cigarette of burner hearth; Take out mouth afterwards at coal pulverizer 5 inlets and from the cold smoke of boiler 13 and behind the cold smoke hybrid cooling that cold smoke blower fan 20 and cold smoke pipeline 21 are carried, get into coal pulverizer 5; Be able to further drying in the process that the coal grain is broken in coal pulverizer 5; Wind powder mixture after grinding gets into mill separator 6; Isolated meal is sent coal pulverizer 5 back to by powder retrieving pipe and is continued to grind, and qualified coal dust and weary gas mix hot blast through hot air mixer 22 and after pulverized coal distributor 7 distributes, is sent to burner 8 in the stove internal combustion then.
Coal pulverizer inlet temperature and coal pulverizer ventilation are regulated through cold smoke, and cold smoke arm 23 leads to 16 outlets of water (or vapour) cold type solid matter pipe high temperature boiler flue gas tube road to regulate the temperature levels in the descending drying tube 4.Cooling water (or vapour) from the Unit Steam Water circulatory system gets into high temperature boiler flue gas tube road 16 from cooling water (or vapour) inlet 24, discharges and return power plant's steam-water circulation system from cooling water (or vapour) outlet 25 then.
Cold air is divided into two-way after sending into air preheater 10 heating by pressure fan 9, and one the tunnel gets into hot air mixer 22 carries out powder feeding, and another road is sent to each burner 8 as secondary wind and is participated in the stove internal combustion after secondary air box 12 is distributed.
The flue gas drying brown coal steel ball powder-grinding system of the utility model compares with existing direct feed pulverized coal-fan mill pulverized coal preparation system, has following characteristics:
(1), be drying medium with the inert gas flue gas, prevent that effectively brown coal from catching fire and detonation, the pulverized coal preparation system security is good.Employing as the drier in the descending drying tube, adopts hot cigarette to ventilate and drying medium as coal pulverizer with cold smoke mixing gained flue gas from the hot cigarette of furnace outlet, and these are obviously different with existing fanned powder-grinding system on drying medium.
(2), water (or vapour) cold type solid matter pipe high temperature boiler flue gas tube road not only significantly reduces the manufacturing of high temperature boiler flue gas tube road, transportation, installation and maintenance cost; And security of operation; Reliability is high, has solved interior in the past insulation or has been incubated all problems that the high temperature boiler flue gas tube road exists outward.
(3), to make that high-grade flue gas heat energy is able to by the steam-water circulation system of unit acting generating used in water (or vapour) cold type solid matter pipe high temperature boiler flue gas tube road; Both improve unit generation efficient, also avoided directly extracting in the stove pipe arrangement difficulty that the moderate oven cigarette is faced simultaneously.
(4), this patent system both can be applicable to also can be applicable to newly-built combustion brown coal generating set at the pulverizing system transformation of using as a servant combustion brown coal generating set.
But; Those of ordinary skill in the art will be appreciated that; Above embodiment is used for explaining the utility model; And be not the qualification that is used as the utility model, as long as in the connotation scope of the utility model, all will drop in claims scope of the utility model variation, the modification of the above embodiment.
Claims (2)
1. flue gas drying brown coal direct feed pulverized coal-fan mill pulverized coal preparation system; Comprise blower mill; Be connected the preceding descending drying tube of blower mill; Outlet is communicated to stove smoke pipe road that the import of descending drying tube and hot cigarette that import is communicated to boiler furnace take out mouthful, be linked in sequence mill separator, pulverized coal distributor behind blower mill, and hot air apparatus; Said pulverized coal distributor is connected to the burner of boiler, and said hot air apparatus divides two-way, and one the tunnel connects burner; It is characterized in that: also include high temperature boiler flue gas tube road and hot air mixer; Said high temperature boiler flue gas tube road surrounds flue by cluster pipe parallel arranged and constitutes; Said pipe is arranged in the steam-water circulation system of power plant, and the outlet in said high temperature boiler flue gas tube road is communicated to that hot cigarette that descending drying tube, import be communicated to boiler furnace is taken out mouthful, said hot air mixer is connected between mill separator and the pulverized coal distributor and another road of hot air apparatus is connected to this hot air mixer; The coal feed point of blower mill is also connected to the cold smoke of the flue of boiler and takes out mouth.
2. flue gas drying brown coal direct feed pulverized coal-fan mill pulverized coal preparation system according to claim 1 is characterized in that: said cold smoke is taken out mouth also is connected to the high temperature boiler flue gas tube road through the cold smoke arm outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120256092U CN202132965U (en) | 2011-07-20 | 2011-07-20 | Fuel-gas drying direct-firing pulverizing system with lignite-fired fanlike coal pulverizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120256092U CN202132965U (en) | 2011-07-20 | 2011-07-20 | Fuel-gas drying direct-firing pulverizing system with lignite-fired fanlike coal pulverizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202132965U true CN202132965U (en) | 2012-02-01 |
Family
ID=45521732
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120256092U Withdrawn - After Issue CN202132965U (en) | 2011-07-20 | 2011-07-20 | Fuel-gas drying direct-firing pulverizing system with lignite-fired fanlike coal pulverizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202132965U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102716794A (en) * | 2012-06-26 | 2012-10-10 | 烟台龙源电力技术股份有限公司 | Cold furnace powder making device for fan mill powder making system boiler |
| CN102759253A (en) * | 2012-07-12 | 2012-10-31 | 西安交通大学 | Flue gas fluidized bed lignite drying system provided with internal heat source and integrated to heat-engine plant |
| CN102889607A (en) * | 2011-07-20 | 2013-01-23 | 上海机易电站设备有限公司 | Direct fired pulverizing system of smoke drying lignite coal fan mill |
| CN107076513A (en) * | 2014-08-08 | 2017-08-18 | 苏伊士国际公司 | The heated drying method and apparatus of pasty product |
-
2011
- 2011-07-20 CN CN201120256092U patent/CN202132965U/en not_active Withdrawn - After Issue
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102889607A (en) * | 2011-07-20 | 2013-01-23 | 上海机易电站设备有限公司 | Direct fired pulverizing system of smoke drying lignite coal fan mill |
| CN102889607B (en) * | 2011-07-20 | 2015-06-17 | 上海援梦电力能源科技咨询中心 | Direct fired pulverizing system of smoke drying lignite coal fan mill |
| CN102716794A (en) * | 2012-06-26 | 2012-10-10 | 烟台龙源电力技术股份有限公司 | Cold furnace powder making device for fan mill powder making system boiler |
| CN102759253A (en) * | 2012-07-12 | 2012-10-31 | 西安交通大学 | Flue gas fluidized bed lignite drying system provided with internal heat source and integrated to heat-engine plant |
| CN107076513A (en) * | 2014-08-08 | 2017-08-18 | 苏伊士国际公司 | The heated drying method and apparatus of pasty product |
| CN107076513B (en) * | 2014-08-08 | 2020-02-11 | 苏伊士国际公司 | Method and apparatus for thermal drying of pasty products |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102889607B (en) | Direct fired pulverizing system of smoke drying lignite coal fan mill | |
| CN102889609B (en) | Smoke drying steel ball brown-coal milling system | |
| CN105889905B (en) | The preposition mixed combustion device and method of biomass ultrahigh speed self-balancing gasification of coal-burning boiler | |
| CN203963981U (en) | A kind of steam drying brown coal medium-speed milling pulverization system | |
| CN203147790U (en) | Exhaust air fluidized brown coal medium speed mill straight-blowing coal pulverizing system | |
| CN202132968U (en) | Smoke drying steel ball brown-coal milling system | |
| CN202132965U (en) | Fuel-gas drying direct-firing pulverizing system with lignite-fired fanlike coal pulverizer | |
| CN202419628U (en) | 300MW mixed-burning high furnace gas boiler | |
| CN102889606A (en) | Direct fired pulverizing system of smoke pre-drying lignite steel ball mill | |
| CN102840594A (en) | Fume dried lignite medium speed mill straight-blowing powder-making system | |
| CN203771439U (en) | High-moisture lignite medium speed mill coal pulverizing system using pulverized coal combustion heating primary air | |
| CN203147791U (en) | Direct-blowing type medium-speed mill pulverizing system for smoke fluidization lignite | |
| CN203116057U (en) | Gas-exhaust brown coal fluidifying medium-speed mill direct-blowing type powder manufacturing and heat energy water recovery power generation system | |
| CN202195494U (en) | Medium-speed grinding and direct-blowing type pulverizing system for smoke-dried lignite | |
| CN104132359A (en) | Open powder making steam warm air type boiler unit and power generation system thereof | |
| CN201748414U (en) | Direct blowing type coal dust boiler anti-explosive treatment system | |
| CN104132363A (en) | Open powder making steam warm air type boiler unit and power generation system thereof | |
| CN203116056U (en) | Medium-speed mill direct blowing coal pulverizing generating system in smoke fluidizing of lignite | |
| CN206724142U (en) | A kind of biomass fuel combustion with reduced pollutants system with blower mill powder | |
| CN203116058U (en) | Zhundong coal sodium-removal pretreatment and smoke fluidization drying medium-speed milling power-processing power generation system | |
| CN205690385U (en) | Coal-burning boiler preposition biomass ultrahigh speed self-balancing gasification mixed combustion device | |
| CN216619875U (en) | Combustion and powder-making system of fan coal mill | |
| CN104132361A (en) | Open powder making steam warm air type boiler unit and power generation system thereof | |
| CN204240386U (en) | Superheat steam drying powder process type coal generating system | |
| CN113446615A (en) | Biomass and coal-fired independently-operated biomass coupling power generation system of pulverized coal boiler |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SHANGHAI YUANMENG ELECTRIC POWER ENERGY TECHNOLOGY Free format text: FORMER OWNER: SHANGHAI JIYI POWER STATION EQUIPMENT CO., LTD. Effective date: 20130912 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 200437 HONGKOU, SHANGHAI TO: 202150 CHONGMING, SHANGHAI |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20130912 Address after: 202150, Shanghai, Chongming County Town East River along No. 7, building 416, room 68 Patentee after: SHANGHAI YUANMENG ELECTRICITY ENERGY TECHNOLOGY CONSULTING CENTER Address before: 200437, 900, Quyang Road, Hongkou District, Shanghai, No. 3, 306-407 Patentee before: Shanghai Electric Power Generation Equipment Co., Ltd. |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20120201 Effective date of abandoning: 20150617 |
|
| RGAV | Abandon patent right to avoid regrant |