CN104566431B - Low-temperature drying and coal conveying integrated equipment for raw coal - Google Patents
Low-temperature drying and coal conveying integrated equipment for raw coal Download PDFInfo
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- CN104566431B CN104566431B CN201410784177.5A CN201410784177A CN104566431B CN 104566431 B CN104566431 B CN 104566431B CN 201410784177 A CN201410784177 A CN 201410784177A CN 104566431 B CN104566431 B CN 104566431B
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- 239000003245 coal Substances 0.000 title claims abstract description 132
- 238000001035 drying Methods 0.000 title claims abstract description 53
- 239000002802 bituminous coal Substances 0.000 claims abstract description 11
- 239000003077 lignite Substances 0.000 claims abstract description 7
- 230000010354 integration Effects 0.000 claims description 20
- 238000010276 construction Methods 0.000 claims description 17
- 239000002245 particle Substances 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000000926 separation method Methods 0.000 claims description 2
- 239000004744 fabric Substances 0.000 claims 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 8
- 239000008187 granular material Substances 0.000 abstract 2
- 239000003476 subbituminous coal Substances 0.000 abstract 2
- 238000007605 air drying Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 7
- 238000004458 analytical method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000010977 unit operation Methods 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000008450 motivation Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
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- Solid Fuels And Fuel-Associated Substances (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The invention discloses low-temperature drying and coal conveying integrated equipment for raw coal and belongs to the field of raw coal drying equipment. In a coal conveying room, a double-layer closed space is formed by an equipment outer shell and an equipment inner shell, air introduction pipelines are connected with the drying equipment inner shell, first water medium heaters are arranged at junctions of the air introduction pipelines and the drying equipment inner shell, a supporting structure, a second water medium heater and a rotating shaft are sequentially arranged inside a crawler from top to bottom, and thus, the low-temperature drying and coal conveying integrated equipment for the raw coal is formed; an outlet of the low-temperature drying and coal conveying integrated equipment is connected with a coal bunker, and external moisture drying for lignite, sub-bituminous coal and bituminous coal is completed while coal granules are conveyed; air drying tail gas is conveyed to chimneys with baffles through an air pipeline and then is exhausted into the atmosphere. According to the low-temperature drying and coal conveying integrated equipment for the raw coal, disclosed by the invention, the external moisture drying for the raw coal (lignite, sub-bituminous coal and bituminous coal) can be completed by using low-temperature drying heat sources of different types while the coal granules are conveyed, so that the efficiency of an electric power plant is increased.
Description
Technical field
The invention belongs to raw coal drying device field, more particularly to a kind of raw coal cold drying and defeated coal integration apparatus.
Background technology
The characteristics of fossil fuel reserves of China, is " rich coal, oil-poor, few gas ", and this feature determines Chinese primary energy
Production and consumption structure general layout in a long time based on coal will not change, and data statisticss show, by the end of the year 2013, combustion
Coal power generation installed capacity is up to 8.17 hundred million kilowatts, annual electricity generating capacity up to 3.94 trillion kilowatt hours, and still remains in recent years annual
The growth rate of ten thousand kilowatts of installed capacitys of 3000-4000.On the other hand, the major pollutants such as the dust of coal-burning power plant, SO2, NOx
Discharge capacity account for 12.20%, 42.16% and the 41.59% of national total release respectively.Therefore, further improve coal fired power plant
Unit operation efficiency is significant for ensureing Chinese energy safety and reducing whole pollution reduction work.
In recent years, National Development and Reform Committee, Chinese Ministry of Environmental Protection, three ministries and commissions of National Energy Board issue《Fire coal energy-saving emission-reducing is upgraded and is changed
Make action plan 2014-2020》Explicitly point out, new-built unit powers mark coal less than 300 grams/kilowatt hour, and this is to China's electric power row
Industry proposes huge challenge.Currently, the means that mainly develop skill are to improve loop parameter, raising unit operation level, but from
Fuels sources cephalomere energy, not yet carries out correlational study.In currently employed coal mill system, the moisture in coal is all entered with boiler air-supply
Hearth combustion.The presence of combustion moisture in coal can reduce its low heat valve, while also limit the exhaust gas temperature of boiler, therefore drop
Low coal-fired utilization ratio.Additionally, the moisture in coal can directly affect coal pulverizer power consumption.Therefore, dropped using appropriate form
The moisture of the coal of low entrance coal pulverizer is highly beneficial to the further reducing energy consumption of coal unit.
In recent years, cold drying technology also increasingly obtains the attention of scholars, such as U.S. Clean Coal Power
Initiative (CCPI) group proposes a kind of fluidized bed drying equipment, and which utilizes the cooling water heating air in cooling tower,
Raw coal is dried using air as dried medium, the moisture of brown coal is effectively reduced, generating efficiency is also improved therewith.
It is well known that China's major impetus coal for bituminous coal, meager coal, its moisture typically in 3%-15%, such as：Cigarette
Coal (3～18%)；Meager coal (4～8%)；Wash coal (7～9%) and in moisture, based on free surface moisture, be about 70%-80%；
Further, since the influence factor such as climatic environment, such as：Our south are bigger than normal near the power station environment humidity of water system, water content in coal
It is general higher.Research and analyse and show, cold drying (40-50 DEG C) removes the free surface moisture of 80-90% in theory, according to different ginsengs
Number unit, reduces marking coal consumption 1.5-3g/kWh using raw coal is predrying.And low temperature can with waste heat exist in power plant in a large number as
Boiler exhaust gas, condenser recirculated water, air cooling island of air cooling unit hot blast etc..Therefore, suitable equipment is found, tries to reclaim more than low temperature
Heat, using its predrying raw coal, has important meaning to coal unit.
The content of the invention
It is an object of the invention to provide a kind of raw coal cold drying and defeated coal integration apparatus, it is characterised in that
Double-layer seal space is constituted by device housings 2 and equipment inner shell 10 in defeated bordroom 1, air introduction duct 3 with it is dry
Dry equipment inner shell 2 is connected, and seam is disposed with the first water-borne formula heater 11, and the inside of crawler belt 6 has been sequentially arranged from top to bottom
Supporting construction 8, the second water-borne formula heater 9 and rotary shaft 7, composition raw coal cold drying and defeated coal integration apparatus；In crawler belt
Lower section, is disposed with auxiliary coal conveyer belt 12；The interval of cyclone separator 4 is fixed on 2 wall of drying equipment inner shell, cyclone separator 4
The chimney 5 blocked with the band for being fixed on 1 top surface of defeated bordroom by air line is connected.
Described air introduction duct is connected with drying equipment inner shell；In air introduction duct, air is sent into by blower fan；The
Two water-borne formula heaters 9 arrange that for multiple rows of coil air enters dry Jing after the second water-borne formula heater 9 is heated to 30～50 DEG C
Dry equipment.
Described supporting construction is in net distribution below crawler belt, and 8 both sides of supporting construction are fixed on 2 inwall of device housings
On, arrangement sealing backplate 13 above 8 steel plate of supporting construction of 6 both sides of crawler belt.
The first water coal formula heater 11 below the supporting construction 8 is arranged in parallel for multiple rows of coil, Temperature of Working model
Enclose for 50～60 DEG C, heating air directly heats the coal particle on crawler belt 6 to 45～55 DEG C.
The raw coal cold drying is connected with coal bunker with the outlet of defeated coal integration apparatus, in the same of conveying coal particle
When, free surface moisture drying is completed to brown coal, ub-bituminous coal and bituminous coal.
The air that the air introduction duct 3 is introduced is Jing after the first water coal formula heater 11 from bottom to top through under crawler belt 6
Side, power transmission shaft 7, the second water-borne formula heater 9, supporting construction 8, on the upside of crawler belt 6, coal seam, so as to be dried to coal particle, do
Dry tail gas enters air Jing after the separation of cyclone separator 4 Jing after air line sends into the chimney 5 that band is blocked.
6 arranged beneath of the crawler belt aids in coal conveyer belt 12, for transporting the broken coal that coal drops from crawler belt 6.
Present invention has the advantages that can efficient utilization power plant low temperature exhaust heat be dried the power station energy-saving equipment of raw coal free surface moisture.
Different types of cold drying thermal source is selected according to different power stations, the low temperature exhaust heat abundant by reclaiming coal fired power plant, to raw coal
Free surface moisture carries out pre-dried, so as to raw coal free surface moisture content is greatly lowered, improves raw coal calorific value, and reduces boiler exhaust gas
Heat loss, improves coal-fired utilization ratio, and then improves the generating efficiency of power plant.Preliminary analyses show for the invention to be applied to China
In-service 600MW supercritical units, the raw coal (7%-11%) for different in moisture content, coal consumption of power supply reduce being about 1.6g/
KWh～2.9g/kWh, for 300MW is subcritical and during 1000MW supercritical units, the raw coal (7%- of different in moisture content
11%), coal consumption of power supply reduces respectively may be about 1.7g/kWh～3.0g/kWh, 1.5g/kWh～2.8g/kWh.
Description of the drawings
Fig. 1 is raw coal cold drying and defeated coal integration apparatus schematic diagram.
Fig. 2 is raw coal cold drying and defeated coal integration apparatus lateral plan.
Fig. 3 is the water-borne formula heater arrangement schematic diagram under defeated coal crawler belt.
Fig. 4 crawler belt supported underneath structure partial views.
Fig. 5 is raw coal cold drying and defeated coal integration apparatus integral layout schematic diagram.
In figure：1 is defeated bordroom, 2 is device housings, 3 is air introduction duct, 4 is cyclone separator, 5 is chimney, 6 are
Defeated coal crawler belt, 7 be rotary shaft, 8 be supporting construction, 9 be water-borne formula heater, 10 be equipment inner shell, 11 be water-borne formula heater,
12 seal for backplate for auxiliary coal conveyer belt, 13.
Specific embodiment
The present invention provides a kind of raw coal cold drying and defeated coal integration apparatus, below in conjunction with the accompanying drawings the present invention is made into
One step is described in detail.
In the raw coal cold drying shown in Fig. 1, Fig. 2, Fig. 5 with defeated coal integration apparatus schematic diagram, in defeated bordroom 1 by
Device housings 2 are connected with drying equipment inner shell 2 with the composition double-layer seal of equipment inner shell 10 space, air introduction duct 3, seam
It is disposed with the first water-borne formula heater 11；First, second water-borne formula heater is that multiple rows of coil arranges (as shown in Figure 3), many
In row's coil, Temperature of Working scope is 50～60 DEG C, and heating air directly heats the coal particle on crawler belt 6 to 45～55 DEG C.；
The inside of crawler belt 6 has been sequentially arranged supporting construction 8, the second water-borne formula heater 9 and rotary shaft 7 from top to bottom, and composition raw coal is low
Temperature is dried and defeated coal integration apparatus, and 6 end of crawler belt of integration apparatus outlet is connected with coal bunker；Below crawler belt, it is disposed with
Auxiliary coal conveyer belt 12, for the broken coal that transport track drops；The interval of cyclone separator 4 is fixed on 2 wall of drying equipment inner shell,
Cyclone separator 4 is connected by the chimney 5 that air line is blocked with the band for being fixed on 1 top surface of defeated bordroom；The crawler belt 6 of defeated coal is by electricity
Motivation drives rotary shaft 7 to rotate, so as to complete the course of conveying of coal particle.
Raw coal cold drying is operated in the confined space with defeated coal integration apparatus；Air introduction duct is sent into by blower fan
3 air, Jing after the first water coal formula heater 11 from bottom to top through on the downside of crawler belt 6, power transmission shaft 7, the second water-borne formula heater
9th, on the upside of supporting construction 8, crawler belt 6, coal seam, so as to be dried to coal particle, is air-dried tail gas Jing in air introduction duct 3
After cyclone separator 4 is separated, air is entered Jing after air line sends into the chimney 5 that band is blocked.Wherein, the second water-borne formulas of air Jing
Heater 9 enters drying equipment after being heated to 30～50 DEG C.
Described supporting construction is in net distribution (as shown in Figure 4) below crawler belt, and 8 both sides of supporting construction are fixed on drying
On 2 inwall of device housings, arrangement sealing backplate 13 above the steel plate of the supporting construction 8 of 6 both sides of crawler belt.
The raw coal cold drying is connected with coal bunker with the outlet of defeated coal integration apparatus, in the same of conveying coal particle
When, free surface moisture drying is completed to brown coal, ub-bituminous coal and bituminous coal.
Jing preliminary analyses are calculated, and preliminary analyses show for the invention to be applied to the in-service 600MW supercritical units of China, for
The raw coal (7%-11%) of different in moisture content, coal consumption of power supply reduce being about 1.6g/kWh～2.9g/kWh, sub- for 300MW
During critical and 1000MW supercritical units, the raw coal (7%-11%) of different in moisture content, coal consumption of power supply reduce respectively may be about
1.7g/kWh～3.0g/kWh, 1.5g/kWh～2.8g/kWh.
The present invention selects different types of cold drying thermal source according to different power stations, by reclaiming abundant low of coal fired power plant
Warm waste heat, carries out pre-dried to raw coal free surface moisture, so as to significantly drop raw coal (many coals such as brown coal, ub-bituminous coal, bituminous coal)
Free surface moisture content, improves raw coal calorific value, and reduces boiler exhaust gas heat loss, and then improves the generating efficiency of power plant.
Claims (5)
1. a kind of raw coal cold drying and defeated coal integration apparatus, it is characterised in that by drying equipment shell in defeated bordroom (1)
(2) with drying equipment inner shell (10) composition double-layer seal space, air introduction duct (3) and drying equipment shell (2) and drying
Equipment inner shell (10) connects, and seam is disposed with the first water-borne formula heater (11), the inside of crawler belt (6) cloth successively from top to bottom
It is equipped with supporting construction (8), the second water-borne formula heater (9) and rotary shaft (7), raw coal cold drying is integrated with defeated coal sets for composition
It is standby；Below crawler belt, auxiliary coal conveyer belt (12) is disposed with；Cyclone separator (4) interval is fixed on drying equipment inner shell (10)
On wall, cyclone separator (4) is connected by the chimney (5) that air line is blocked with the band for being fixed on defeated bordroom (1) top surface；It is described
The air that air introduction duct (3) is introduced is Jing after the first water-borne formula heater (11) from bottom to top through on the downside of crawler belt (6), rotation
Axle, the second water-borne formula heater (9), supporting construction (8), on the upside of crawler belt (6), coal seam, so as to be dried to coal particle, be dried
Tail gas enters air Jing after cyclone separator (4) separation Jing after air line sends into the chimney (5) that band is blocked.
2. raw coal cold drying according to claim 1 and defeated coal integration apparatus, it is characterised in that the seam cloth
It is equipped with the first water-borne formula heater (11) to be arranged in parallel for multiple rows of coil, in air introduction duct (3), air is sent into by blower fan；
Air enters drying equipment Jing after the first water-borne formula heater (11) is heated to 30～50 DEG C；Below the supporting construction (8)
Second water-borne formula heater (9) arranges that for multiple rows of coil Temperature of Working scope is 50～60 DEG C, by into after drying equipment
30～50 DEG C of air are again heated to 45～55 DEG C, directly heat the coal particle on crawler belt (6).
3. raw coal cold drying according to claim 1 and defeated coal integration apparatus, it is characterised in that described support knot
In net distribution below crawler belt (6), supporting construction (8) both sides are fixed on drying equipment shell (2) inwall structure (8), crawler belt
(6) arrangement sealing backplate (13) above the supporting construction steel plate of both sides.
4. raw coal cold drying according to claim 1 and defeated coal integration apparatus, it is characterised in that the raw coal low temperature
Drying is connected with coal bunker with the outlet of defeated coal integration apparatus, while coal particle is conveyed, to brown coal, ub-bituminous coal and bituminous coal
Complete free surface moisture drying.
5. raw coal cold drying according to claim 1 and defeated coal integration apparatus, it is characterised in that the defeated coal of the auxiliary
The broken coal that belt (12) drops from crawler belt (6) for transport.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410784177.5A CN104566431B (en) | 2014-12-16 | 2014-12-16 | Low-temperature drying and coal conveying integrated equipment for raw coal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410784177.5A CN104566431B (en) | 2014-12-16 | 2014-12-16 | Low-temperature drying and coal conveying integrated equipment for raw coal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104566431A CN104566431A (en) | 2015-04-29 |
| CN104566431B true CN104566431B (en) | 2017-04-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410784177.5A Expired - Fee Related CN104566431B (en) | 2014-12-16 | 2014-12-16 | Low-temperature drying and coal conveying integrated equipment for raw coal |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107401755A (en) * | 2017-08-02 | 2017-11-28 | 大唐东北电力试验研究所有限公司 | The energy conserving system of station boiler steam turbine |
| CN111322605B (en) * | 2020-03-04 | 2020-09-04 | 恒盛能源股份有限公司 | Coal-fired power generation method |
| CN113268887B (en) * | 2021-06-22 | 2023-03-10 | 西安热工研究院有限公司 | Optimal heat source determining system and method for boiler air heater of coal electric unit |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU805013A1 (en) * | 1978-12-04 | 1981-02-15 | Производственное Объединение"Центрэнергоцветмет" | Solid fuel feeder |
| JPH08261650A (en) * | 1995-03-20 | 1996-10-11 | Osaka Gas Chem Kk | Perishables drier |
| CN200986375Y (en) * | 2006-11-29 | 2007-12-05 | 由智光 | Multiple layer chain heat air smoke extraction dual firing drying furnace for formed coal |
| CN102533302A (en) * | 2012-02-06 | 2012-07-04 | 无锡亿恩科技股份有限公司 | Internal heating type dryer for in-furnace coking coal dehumidification |
| CN203534081U (en) * | 2013-10-25 | 2014-04-09 | 湖南三德科技股份有限公司 | Blowing hot air penetrating dry box |
| CN103575077B (en) * | 2013-11-07 | 2015-09-16 | 浙江大学 | A kind of Multi-layer belt type drying system |
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2014
- 2014-12-16 CN CN201410784177.5A patent/CN104566431B/en not_active Expired - Fee Related
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| CN104566431A (en) | 2015-04-29 |
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Granted publication date: 20170412 |