CN101852540B - Comprehensive utilization system for drying low-order coal of thermal power plant in steam pumping and indirect heat exchanging way and process thereof - Google Patents
Comprehensive utilization system for drying low-order coal of thermal power plant in steam pumping and indirect heat exchanging way and process thereof Download PDFInfo
- Publication number
- CN101852540B CN101852540B CN 201010222665 CN201010222665A CN101852540B CN 101852540 B CN101852540 B CN 101852540B CN 201010222665 CN201010222665 CN 201010222665 CN 201010222665 A CN201010222665 A CN 201010222665A CN 101852540 B CN101852540 B CN 101852540B
- Authority
- CN
- China
- Prior art keywords
- steam
- low
- order coal
- power plant
- drying
- 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.)
- Active
Links
Images
Landscapes
- Drying Of Solid Materials (AREA)
Abstract
The invention relates to a comprehensive utilization system for drying low-order coal of a thermal power plant in a steam pumping and indirect heat exchanging way and a process thereof. The system comprises an indirect-heat-exchange low-order coal predrying device using a steam pipeline of a boiler or a steam turbine of the thermal power plant as a heat source, wherein tail steam obtained by the drying low-order coal of the device is connected with a secondary steam heat insulating and washing device; the secondary steam heat insulating and washing device is connected with a secondary steam recycling device; and the secondary steam recycling device is connected with a dust-containing waste water purifying and utilizing device. In the invention, the steam pumped by the boiler or the steam turbine is used as the drying heat source, high-moisture low-order coal (brown coal) is dewatered and dried through an indirect-heat-exchange drier, and secondary steam generated by dewatering the low-order coal (brown coal) is butt jointed with a steam-water system of the power plant, thereby the operating condition of the boiler is improved, the CO2 emission and fuel consumption are obviously reduced, the loss of a coal mill and matched systems is reduced, the generating efficiency of the power plant is improved, and the blank of the drying and the comprehensive utilization of the low-order coal (brown coal) of the thermal power plant in China is filled.
Description
Technical field
The present invention relates to a kind of thermal power plant in steam pumping indirect heat exchange drying low-order coal utilization system and technology thereof.
Background technology
Present domestic coal-fired station does not also have actual expansion to the dry commercial Application of low-order coal (brown coal); And to low-order coal (brown coal) power plant of existing use pulverized-coal fired boiler, domestic present commercial scale low-order coal (brown coal) drying and dehydrating technology is a blank.
Summary of the invention
The object of the invention is exactly in order to address the above problem; A kind of thermal power plant in steam pumping indirect heat exchange drying low-order coal utilization system and technology thereof are provided; It passes through the steam of boiler or steam turbine extraction as drying source; The low-order coal (brown coal) of the high-moisture drying machine through indirect heat exchange is dehydrated, and the indirect steam that low-order coal (brown coal) dehydration is produced and the boiler circuit of power plant dock, can improve the boiler operatiopn condition; Can obviously reduce CO2 discharging and fuel consumption; Reduce the loss of coal pulverizer and corollary system, improve the generating efficiency of power plant, filled up the blank of the dry comprehensive utilization of domestic thermal power plant low-order coal (brown coal).
For realizing above-mentioned purpose, the present invention adopts following technical scheme:
A kind of thermal power plant in steam pumping indirect heat exchange drying low-order coal utilization system; It comprises that the steam pipework with heat power plant boiler or steam turbine is the indirect heat exchange low-order coal pre-drying device of thermal source; The steam tail gas of the drying low-order coal gained of this device is connected with the adiabatic wash mill of indirect steam; The adiabatic wash mill of indirect steam is connected with the indirect steam recycle device, and the indirect steam recycle device then is connected with dust-laden purification of waste water use device.
Said indirect heat exchange low-order coal pre-drying device comprises that at least one has the main drying of built-in heat exchanger, and its built-in heat exchanger inlet end is communicated with the steam pipework of heat power plant boiler or steam turbine; The outlet side is connected with condensate system; The main drying charging aperture is connected with feed arrangement, and discharging opening connects the boiler feeding system; Steam tail gas is divided into two-way after after the one-level dust arrester dedusting at least, the one tunnel returns main drying after the vapour compression unit compression; The adiabatic wash mill of indirect steam is sent on another road.
Said dust arrester is made up of the cyclone dust collectors and the one-level electrostatic precipitator of two-stage or three grades of series connection.
Said dust arrester is composed in series by three grades of cyclone dust collectors.
Said vapour compression unit is vapour compression machine or blower fan and heat pump.
Said feed arrangement comprises coal bunker, and coal bunker cooperates with transport, and transport is connected with the sealing feeding device, and the sealing feeding device is connected with the indirect heat exchange drying machine.
The adiabatic wash mill of said indirect steam comprises scrubbing tower and circulating hot-water pump and the moisturizing discharge pipe line that is connected.
Said indirect steam recycle device comprises heat exchange condensers and boiler feedwater or heating system.
Said dust-laden purification of waste water use device comprises intake pool, product pond, water purification installation water-delivery pump and the connecting line that connects successively.
A kind of technology of thermal power plant in steam pumping indirect heat exchange drying low-order coal utilization system; As heat medium, this part steam gets into indirect heat exchange low-order coal pre-drying device and carries out dry heat exchange from the low-order coal that the sealing feeding device adds with the steam that from heat power plant boiler or steam turbine, extracts for it; Indirect heat exchange low-order coal pre-drying device is heated as superheated steam with the moisture of deviating from the low-order coal, returns indirect heat exchange low-order coal pre-drying device after the vapour compression machine of leading up to after this part the superheated steam dedusting pressurization and carries out recycle; Another road is through second use behind washing, purifying, is used for heating boiler feedwater or heating, uses as the life water conservancy behind the water reclaiming clean that condensation is got off; Dried low-order coal and get into feeder together from the collected coal dust of dust arrester gets into boiler combustion through coal pulverizer.
The present invention is as a kind of thermal power plant in steam pumping indirect heat exchange drying low-order coal (brown coal) utilization system; Comprise power plant boiler or extracted steam from turbine device, have the drying device (for example: internal heating fluidized bed drying machine, steam rotary dryer etc.) of built-in heat exchanger; Have sealing function feed arrangement, have the drawing mechanism of sealing function; Multistage dust arrester, circulation vapour pressure compression apparatus, the adiabatic wash mill of superheated steam; The Steam Recovery use device, compositions such as water reclaiming clean device.
Beneficial effect of the present invention: add superheated steam contact drying system in thermal power plant's internal system and carry out predrying to low-order coal (brown coal); With the boiler turbine boiler circuit and the coal supply system in thermal power plant with water treatment system all couples together and slitless connection is accomplished by thermal power plant, improved boiler efficiency; Reduced gross coal consumption rate; Reduced CO2 emission, practiced thrift mass energy consumption, energy-saving effect is remarkable.Therefore great promotion prospect is at home and abroad arranged.In China is under the Strategic Context of main energy sources with coal; Quick growth trend to low-order coal (brown coal) generating ratio; Develop and spread thermal power plant in steam pumping indirect heat exchange drying low-order coal (brown coal) comprehensive utilization technique energetically; To the technology upgrading innovation and the energy-saving and emission-reduction work of China's electric power energy industry, will play crucial impetus, be environmentally friendly, water resource economizing type clean coal technological project.
Description of drawings
Fig. 1 is a process schematic representation of the present invention.
Wherein, 1. coal bunker 2. transports 3. seal adiabatic wash mill 11. heat exchange condensers of feeding device I 4. main dryings 5. sealed discharging devices 6. one-level cyclone dust collectors 7. secondary cyclone dust collectors, 8. electrostatic precipitators, 9. vapour compression machines, 10. indirect steams 12 feed water systems of boiler 13 heating systems 14 dust-laden purification of waste water use devices.
The specific embodiment
Below in conjunction with accompanying drawing the present invention is further specified.
Among Fig. 1; Thermal power plant in steam pumping indirect heat exchange drying low-order coal utilization system comprises that the steam pipework with heat power plant boiler or steam turbine is the indirect heat exchange low-order coal pre-drying device of thermal source; The steam tail gas of the drying low-order coal gained of this device is connected with the adiabatic wash mill of indirect steam; The adiabatic wash mill of indirect steam is connected with the indirect steam recycle device, and the indirect steam recycle device then is connected with dust-laden purification of waste water use device.
Said indirect heat exchange low-order coal pre-drying device comprises at least one main drying that has built-in heat exchanger 4, and its built-in heat exchanger inlet end is communicated with the steam pipework of heat power plant boiler or steam turbine; The outlet side is connected with condensate system; Main drying 4 charging apertures are connected with feed arrangement, and discharging opening connects the boiler feeding system through sealed discharging device 5; Steam tail gas is divided into two-way after after the one-level dust arrester dedusting at least, the one tunnel returns main drying 4 after the vapour compression unit compression; The adiabatic wash mill of indirect steam is sent on another road.
Said dust arrester is made up of with secondary cyclone dust collector 7 and electrostatic precipitator 8 the one-level cyclone dust collector 6 of series connection.Certainly, said dust arrester also can be composed in series by three grades of cyclone dust collectors, perhaps uses the combination of one-level, secondary and three grades of cyclone dust collectors and static pressue device, also can be fully with the combination of cyclone dust collector.
Said vapour compression unit is vapour compression machine 9 or blower fan and the heat pump with said function.
Feed arrangement comprises coal bunker 1, and coal bunker 1 cooperates with transport 2, and transport 2 is connected with sealing feeding device 3, and sealing feeding device 3 is connected with main drying 4.Transport 2 is including, but not limited to being conveying worm, embedded scraper transporter, belt conveyor, chain scraper conveyor or bucket elevator etc.; Sealing feeding device 3 is including, but not limited to rotation discharge valve, star-like valve, airlock, conveying worm, embedded scraper transporter or chain scraper conveyor etc.
The built-in heat exchanger of main drying 4 can be one or more groups heat exchanger tube; The inner-heating tube import links to each other with the steam of extracting out from power plant boiler or steam turbine, and the completion exchange heat becomes the boiler circuit that condensed water returns boiler and steam turbine in the inner-heating tube group of steam in main drying 4.
The adiabatic wash mill 10 of indirect steam comprises scrubbing tower and circulating hot-water pump and the moisturizing discharge pipe line that is connected.
The indirect steam recycle device comprises heat exchange condensers 11 and the feed water system of boiler 12 or heating system 13.
Dust-laden purification of waste water use device 14 comprises intake pool, product pond, water purification installation water-delivery pump and the connecting line that connects successively.
Technology of the present invention is: as heat medium, this part steam gets into indirect heat exchange low-order coal pre-drying device and carries out dry heat exchange from the low-order coal that the sealing feeding device adds with the steam that from heat power plant boiler or steam turbine, extracts for it; Indirect heat exchange low-order coal pre-drying device is heated as superheated steam (indirect steam) with the moisture of deviating from the low-order coal, returns indirect heat exchange low-order coal pre-drying device after the vapour compression machine of leading up to after this part the superheated steam dedusting pressurization and carries out recycle; Another road is through second use behind washing, purifying, is used for heating boiler feedwater or heating, uses as the life water conservancy behind the water reclaiming clean that condensation is got off; Dried low-order coal and get into feeder together from the collected coal dust of dust arrester gets into boiler combustion through coal pulverizer.
Claims (4)
1. a thermal power plant in steam pumping indirect heat exchange drying low-order coal utilization system is characterized in that, it comprises that the steam pipework with power plant boiler or steam turbine is the indirect heat exchange low-order coal pre-drying device of thermal source;
The steam tail gas of the drying low-order coal gained of this device is connected with the adiabatic wash mill of indirect steam, and the adiabatic wash mill of indirect steam is connected with the indirect steam recycle device, and the indirect steam recycle device then is connected with dust-laden purification of waste water use device; The adiabatic wash mill of said indirect steam comprises scrubbing tower and circulating hot-water pump and the moisturizing discharge pipe line that is connected; Said indirect steam recycle device comprises heat exchange condensers and boiler feedwater or heating system; Said dust-laden purification of waste water use device comprises intake pool, product pond, water purification installation water-delivery pump and the connecting line that connects successively;
Said indirect heat exchange low-order coal pre-drying device comprises that at least one has the main drying of built-in heat exchanger, and its built-in heat exchanger inlet end is communicated with the steam pipework of heat power plant boiler or steam turbine; The outlet side is connected with condensate system; The main drying charging aperture is connected with feed arrangement, and discharging opening connects the boiler feeding system; Indirect heat exchange low-order coal pre-drying device is heated as superheated steam with the moisture of deviating from the low-order coal; Steam tail gas is through be divided into two-way after the dedusting of one-level dust arrester at least; One the tunnel returns main drying after the vapour compression unit compression, said vapour compression unit is vapour compression machine or blower fan and the heat pump with said function; The adiabatic wash mill of indirect steam is sent on another road;
Said feed arrangement comprises coal bunker, and coal bunker cooperates with transport, and transport is connected with the sealing feeding device, and the sealing feeding device is connected with main drying;
Thereby with the boiler turbine boiler circuit and the coal supply system of thermal power plant with water treatment system all couples together and slitless connection is accomplished by thermal power plant.
2. thermal power plant in steam pumping indirect heat exchange drying low-order coal utilization system as claimed in claim 1 is characterized in that said dust arrester is made up of the cyclone dust collectors and the one-level electrostatic precipitator of two-stage or three grades of series connection.
3. thermal power plant in steam pumping indirect heat exchange drying low-order coal utilization system as claimed in claim 1 is characterized in that said dust arrester is composed in series by three grades of cyclone dust collectors.
4. the technology of the said thermal power plant in steam pumping indirect heat exchange of claim 1 a drying low-order coal utilization system; It is characterized in that; As heat medium, this part steam gets into indirect heat exchange low-order coal pre-drying device and carries out dry heat exchange from the low-order coal that the sealing feeding device adds with the steam that from power plant boiler or steam turbine, extracts for it; Indirect heat exchange low-order coal pre-drying device is heated as superheated steam with the moisture of deviating from the low-order coal, returns indirect heat exchange low-order coal pre-drying device after the vapour compression unit of leading up to after this part the superheated steam dedusting pressurization and carries out recycle; Another road is through second use behind washing, purifying, is used for heating boiler feedwater or heating, uses as the life water conservancy behind the water reclaiming clean that condensation is got off; Dried low-order coal and get into feeder together from the collected coal dust of dust arrester gets into boiler combustion through coal pulverizer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010222665 CN101852540B (en) | 2010-07-12 | 2010-07-12 | Comprehensive utilization system for drying low-order coal of thermal power plant in steam pumping and indirect heat exchanging way and process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010222665 CN101852540B (en) | 2010-07-12 | 2010-07-12 | Comprehensive utilization system for drying low-order coal of thermal power plant in steam pumping and indirect heat exchanging way and process thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101852540A CN101852540A (en) | 2010-10-06 |
| CN101852540B true CN101852540B (en) | 2012-07-04 |
Family
ID=42804139
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010222665 Active CN101852540B (en) | 2010-07-12 | 2010-07-12 | Comprehensive utilization system for drying low-order coal of thermal power plant in steam pumping and indirect heat exchanging way and process thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101852540B (en) |
Families Citing this family (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102051246A (en) * | 2010-12-24 | 2011-05-11 | 徐斌 | Method for improving quality of brown coal |
| CN102183122A (en) * | 2011-03-01 | 2011-09-14 | 中国中轻国际工程有限公司 | Drying dehydration steam-recycle process and device for solid containing water |
| CN102506573B (en) * | 2011-11-04 | 2014-04-02 | 石家庄工大化工设备有限公司 | Method for indirectly recovering waste gas and waste heat of dryer by compression heat pump |
| CN102435016B (en) * | 2011-11-04 | 2013-11-13 | 石家庄工大化工设备有限公司 | Method for directly recycling waste gas and waste heat of dryer by utilizing compression heat pump |
| CN102494525B (en) * | 2011-12-15 | 2014-01-29 | 石家庄工大化工设备有限公司 | Process utilizing steam jet pump to recover waste heat of exhaust gas of dryer indirectly |
| CN102494526B (en) * | 2011-12-15 | 2014-03-12 | 石家庄工大化工设备有限公司 | Method for directly recovering waste gas and waste heat of dryer by utilizing steam jet pump |
| CN102494517A (en) * | 2011-12-17 | 2012-06-13 | 无锡亿恩科技股份有限公司 | Cascade staged drying system for brown coal |
| CN102600693A (en) * | 2012-02-28 | 2012-07-25 | 胡彬 | Method for waste steam recycling system |
| CN102967121B (en) * | 2012-11-30 | 2014-12-10 | 山东科院天力节能工程有限公司 | Lignite drying system and technology with superheated steam capable of recycling waste steam heat |
| CN104807312B (en) * | 2014-01-27 | 2017-04-12 | 西门子公司 | Drying system for solid material |
| CN104132522B (en) * | 2014-08-12 | 2016-08-17 | 北京电力设备总厂有限公司 | The technique of a kind of Low Temperature Steam contact drying brown coal and system and device thereof |
| CN104373947B (en) * | 2014-11-13 | 2016-05-25 | 上海理工大学 | Superheat steam drying powder process type coal generating system |
| CN104373951B (en) * | 2014-11-13 | 2016-06-08 | 上海理工大学 | Superheat steam drying powder process type coal generating system |
| CN105276938A (en) * | 2015-03-10 | 2016-01-27 | 洛阳辰祥机械科技有限公司 | Material drying device and stirring and drying method thereof |
| CN107763967A (en) * | 2017-11-24 | 2018-03-06 | 航天长征化学工程股份有限公司 | Low-rank coal drying system with steam compression circulation |
| CN110313315A (en) * | 2018-03-29 | 2019-10-11 | 万华禾香板业(湖北)有限责任公司 | Straw preparation method and system |
| CN110131001A (en) * | 2019-04-24 | 2019-08-16 | 中国神华能源股份有限公司 | The regulation method of electricity generation system and electricity generation system |
| CN111318554A (en) * | 2020-04-01 | 2020-06-23 | 大唐环境产业集团股份有限公司 | Ammonium removal system and method for fly ash |
| CN112460578A (en) * | 2020-11-23 | 2021-03-09 | 西安热工研究院有限公司 | Method and system for utilizing east China coal |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4245395A (en) * | 1974-10-02 | 1981-01-20 | Monash University | Fluidized bed drying |
| CN1828205A (en) * | 2006-02-09 | 2006-09-06 | 山东天力干燥设备有限公司 | Pipe burying fluid bed drying process for refining salt and saltpetre |
| CN101581533A (en) * | 2009-06-04 | 2009-11-18 | 山东天力干燥设备有限公司 | Device for pre-drying lignite through overheated steam and process thereof |
| CN101581532A (en) * | 2009-06-04 | 2009-11-18 | 山东天力干燥设备有限公司 | Multi-effect system and process for pre-drying lignite through overheated steam |
| CN101760222A (en) * | 2009-12-25 | 2010-06-30 | 山东天力干燥设备有限公司 | Novel fluidized bed semicoke production system and process thereof |
| CN201697441U (en) * | 2010-07-12 | 2011-01-05 | 山东天力干燥设备有限公司 | Indirect heat exchanging drying low-rank coal utilization system of pumped steam of thermal power plant |
-
2010
- 2010-07-12 CN CN 201010222665 patent/CN101852540B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4245395A (en) * | 1974-10-02 | 1981-01-20 | Monash University | Fluidized bed drying |
| CN1828205A (en) * | 2006-02-09 | 2006-09-06 | 山东天力干燥设备有限公司 | Pipe burying fluid bed drying process for refining salt and saltpetre |
| CN101581533A (en) * | 2009-06-04 | 2009-11-18 | 山东天力干燥设备有限公司 | Device for pre-drying lignite through overheated steam and process thereof |
| CN101581532A (en) * | 2009-06-04 | 2009-11-18 | 山东天力干燥设备有限公司 | Multi-effect system and process for pre-drying lignite through overheated steam |
| CN101760222A (en) * | 2009-12-25 | 2010-06-30 | 山东天力干燥设备有限公司 | Novel fluidized bed semicoke production system and process thereof |
| CN201697441U (en) * | 2010-07-12 | 2011-01-05 | 山东天力干燥设备有限公司 | Indirect heat exchanging drying low-rank coal utilization system of pumped steam of thermal power plant |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101852540A (en) | 2010-10-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101852540B (en) | Comprehensive utilization system for drying low-order coal of thermal power plant in steam pumping and indirect heat exchanging way and process thereof | |
| CN201697441U (en) | Indirect heat exchanging drying low-rank coal utilization system of pumped steam of thermal power plant | |
| CN101581533B (en) | Device for pre-drying lignite through overheated steam and process thereof | |
| CN201569260U (en) | Indirect heat-exchange rotation superheating steam brown coal drying system | |
| CN102759259B (en) | Brown coal upgrading-power generation co-production system | |
| CN101581532B (en) | Multi-effect system and process for pre-drying lignite through overheated steam | |
| CN102353237B (en) | High-moisture-content lignite predrying method and system integrated with thermal power plant | |
| CN101565263B (en) | Sludge superheated vapor drying system of two-stage paddle dryer and drying process thereof | |
| WO2015176570A1 (en) | Method and apparatus for high-moisture, lower heating value lignite drying and water recovery in generator set | |
| CN105179023B (en) | A kind of predrying brown coal electricity generation system of integrated first-class absorption type heat pump and method | |
| CN102759253B (en) | Flue gas fluidized bed lignite drying system provided with internal heat source and integrated to heat-engine plant | |
| CN103644709A (en) | Superheated steam drying device and method | |
| AU2009347547A1 (en) | Multi-effect brown coal predrying system using superheated steam and process thereof | |
| CN104534850B (en) | A kind of predrying system and method for raw coal low temperature utilizing flue gas, exhaust steam used heat | |
| CN103277155B (en) | Brown coal are predrying-preheated air-UTILIZATION OF VESIDUAL HEAT IN compound coal generating system | |
| CN102650493B (en) | Device and technology for drying lignite by jointly using rotary steam tubes and high frequency | |
| CN201954917U (en) | High-moisture lignite drying system | |
| CN202328279U (en) | Low temperature hot-blast air sludge drying and incineration generation integral system for heat pump | |
| CN105779071A (en) | Dewatering upgrading system and method of high-moisture lignite | |
| CN209893904U (en) | Lignite drying and water collecting system based on steam recompression technology | |
| CN201530772U (en) | System utilizing double-stage paddle dryers and drying sludge with superheated steam | |
| CN103983088A (en) | System and method for predrying lignite and recycling water by using waste heat of power station | |
| CN201413003Y (en) | Superheated steam lignite predrying system | |
| CN103822439B (en) | One utilizes surplus heat of power plant to carry out pre-dried system and method to brown coal | |
| CN201413002Y (en) | Multi-effect superheated steam lignite predrying system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |