CN104179537A - Brown coal drying power generating system capable of recycling water in coal and implementation method of brown coal drying power generating system - Google Patents
Brown coal drying power generating system capable of recycling water in coal and implementation method of brown coal drying power generating system Download PDFInfo
- Publication number
- CN104179537A CN104179537A CN201410405778.0A CN201410405778A CN104179537A CN 104179537 A CN104179537 A CN 104179537A CN 201410405778 A CN201410405778 A CN 201410405778A CN 104179537 A CN104179537 A CN 104179537A
- Authority
- CN
- China
- Prior art keywords
- coal
- brown
- brown coal
- drying
- water
- 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.)
- Granted
Links
Landscapes
- Solid Fuels And Fuel-Associated Substances (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The invention discloses a brown coal drying power generating system capable of recycling water in coal and an implementation method of the brown coal drying power generating system. The brown coal drying power generating system comprises a boiler, a steam turbine, a water feed pump, a condenser, a coal mil, a brown coal drying device, a device for recycling the water in the coal, a raw coal bunker, a low-pressure heater, a deaerator, a high-pressure heater, a condensate pump and a steam-water mixer. The brown coal drying device is connected with the device for recycling the water in the coal, the raw coal bunker, the low-pressure heater, the deaerator, the high-pressure heater, the condensate pump, the steam-water mixer, the boiler, the steam turbine, the water feed pump, the condenser and the coal mill. Operation of a large-capacity brown coal power generating set is achieved by integral design of the brown coal drying device and the boiler and combination of the device for recycling the water in the coal and the steam turbine.
Description
Technical field
The present invention relates to coal-fired thermal power generating technology field, be specifically related to brown coal drying power generation system and implementation methods thereof that in a kind of coal, water reclaims.
Background technique
China's brown coal reserves are larger, approximately 2,100 hundred million tons of explored storage volumes, account for 13% of national coal reserves, this coal water content high (35%～50%), heating value is low, volatile constituent is high, easy spontaneous combustion, large-scale develops and utilizes and is all subject to larger restriction as feedstock conversion utilization.For brown coal are efficiently utilized, most economical method is first carried out drying and dehydrating to it exactly.In power industry, by reducing the moisture in brown coal, improve heating value, can reduce the investment of follow-up system equipment (powder process, boiler, desulfurization, dedusting etc.).
At present, domestic power plant uses the mode of the higher calorific values such as brown coal employing and bituminous coal, low-moisture coal multifuel combustion, and boiler milling system is identical with the system that directly uses other fat coal.Coal, entering before coal pulverizer dryly, because moisture is high, causes boiler exhaust gas loss large, and the thermal efficiency is low, and Economy is limited, and the discharge amount of greenhouse gases is also larger.Brown coal calorific value is lower in addition, makes boiler body volume become large for reaching identical electric motor power, involves great expense, and boiler accessory machinery type selecting is large, and station service power consumption rate is high.
Aspect brown coal generation technology, publication number is that the Chinese utility model patent of CN101881191A discloses a kind of thermal power generation system based on the predrying upgrading of high-moisture brown coal and recovery technology, the brown coal pre-drying device that it provides is traditional brown coal drying machine, heat transfer effect is poor, floor space is large, when operation, noise is high, and energy dissipation is serious; Another publication number is that the Chinese utility model patent of CN102944024A discloses a kind of brown coal thermal power generation system, except having equally above-mentioned shortcoming, the water vapor evaporating in coal reclaims by water and steam direct heat transfer, cause recycle-water and cooling water to be mixed into one, the pollution deposit of carrying in steam in water, water treatment airplane crash.In addition, the feature of these two patent maximums is to be all transported to boiler room generating after adopting brown coal drying again, is the linking of simple brown coal drying and power plant's generating, and engineering cost is large; Meanwhile, the easily spontaneous combustion in course of conveying of dry brown coal, danger are larger, and conveying equipment power consumption is large.
Given this, require further improvement and improve existing brown coal drying and power plant's generation technology, the power generation system after improvement and implementation methods thereof can either realize effective recovery of brown moisture in coal, can simplify again dry brown coal and be delivered to the flow process of power plant for generating electricity; Meanwhile, engineering cost reduces, and energy dissipation reduces, and has responded the policy that national energy-saving reduces discharging.
Summary of the invention
In order to solve the problems of the technologies described above, the invention provides brown coal drying power generation system and implementation methods thereof that in a kind of coal, water reclaims, this technological scheme relates to brown coal drying pulverizing system and the improvement of Steam Turbine Regenerative System and the improvement that relevant apparatus is connected that in coal, water reclaims, by brown coal drying with boiler milling system integral arrangement, after brown coal drying and dehydrating, carry out again combustion power generation, the water evaporating in coal is reclaimed simultaneously, thereby realize power plant's investment minimizing, using energy source lifting, benefit raising.
To achieve these goals, the present invention adopts following technological scheme.
The brown coal drying power generation system that in a kind of coal, water reclaims, comprise boiler, steam turbine, feed water pump, vapour condenser, coal pulverizer, coal pulverizer is connected with boiler, boiler connects steam turbine by pipeline, steam turbine is connected with vapour condenser, vapour condenser connects feed water pump by pipeline, it is characterized in that: this system also comprises apparatus for recovering in brown coal drying device, coal, and run coal bin, low-pressure heater, oxygen-eliminating device, high-pressure heater, condensate pump, steam heater; Described brown coal drying device is connected with apparatus for recovering, run coal bin, low-pressure heater, oxygen-eliminating device, high-pressure heater, condensate pump, steam heater in coal, and the composition brown coal drying power generation system that is connected with boiler, steam turbine, feed water pump, vapour condenser, coal pulverizer; By brown coal drying device and boiler integral arrangement are designed, in coal, apparatus for recovering combines with Steam Turbine Regenerative System, realizes the operation of large capacity brown coal generator set.
In above-mentioned arbitrary technological scheme, preferably, described feed water pump comprises low pressure feed water pump and high pressure water pump.
In above-mentioned arbitrary technological scheme, preferably, described brown coal drying device comprises dryer, coal-feeding conveyer, dry coal storehouse, drainer, deduster, and described dryer is connected with coal-feeding conveyer, dry coal storehouse, drainer, deduster.
In above-mentioned arbitrary technological scheme, preferably, described run coal bin is connected by coal-feeding conveyer with dryer, and the discharge port of dryer is connected with dry coal storehouse.
In above-mentioned arbitrary technological scheme, preferably, the condensate outlet of described dryer is connected with drainer, and the moisture outlet of dryer is connected with deduster.
In above-mentioned arbitrary technological scheme, preferably, the coal dropping port of described deduster is connected with dry coal storehouse, and dry coal storehouse is connected by coal-feeding conveyer with coal pulverizer.
In above-mentioned arbitrary technological scheme, preferably, described coal pulverizer is connected with boiler, and the steam (vapor) outlet of boiler is connected with steam turbine by pipeline.
In above-mentioned arbitrary technological scheme, preferably, the relief opening of described steam turbine is connected with vapour condenser, and the water outlet of vapour condenser connects low pressure feed water pump, low-pressure heater to oxygen-eliminating device successively by pipeline.
In above-mentioned arbitrary technological scheme, preferably, the water outlet of described oxygen-eliminating device connects high pressure water pump, high-pressure heater successively to boiler feed water entrance.
In above-mentioned arbitrary technological scheme preferably, the low-pressure pumping steam mouth of described steam turbine is connected to steam heater, low-pressure pumping steam and water are mixed into brown coal drying device, condensation water in drainer is sent into oxygen-eliminating device by condensate pump, moisture after filtering by deduster enters apparatus for recovering in coal, in coal, recycle-water enters Waste Water Treatment by pipeline, weary gas is disposed to atmosphere, low pressure feed water delivery side of pump is connected to apparatus for recovering in coal, and boiler feed water enters heat regenerative system again through apparatus for recovering in coal.
In above-mentioned arbitrary technological scheme, preferably, described dryer is two, and two dryer positioned opposite share a dry coal storehouse, supply a coal pulverizer; Described dryer is arranged in above coal pulverizer, brown coal drying with boiler milling system integral arrangement in boiler room.
In above-mentioned arbitrary technological scheme, preferably, described dryer is pipe drier, and coal is walked in pipe, and steam is walked in housing, coal and vapour indirect heat exchange.
In above-mentioned arbitrary technological scheme, preferably, the required dry heat of described dryer is from water and the steam turbine low-pressure mixed steam that draws gas, and pressure is 0.4～0.65MPaA, and temperature is 150～175 DEG C.
In above-mentioned arbitrary technological scheme, preferably, the condensed fluid of two dryers of described positioned opposite reclaims and shares a drainer, and condensed fluid enters oxygen-eliminating device by condensate pump.
In above-mentioned arbitrary technological scheme, preferably, described deduster is sack cleaner, and two dryers of positioned opposite share a deduster.
In above-mentioned arbitrary technological scheme, preferably, in described coal, apparatus for recovering adopts finned heat exchanger, and the steam of separating out in coal reclaims by boiler feed water condensation.
In above-mentioned arbitrary technological scheme, preferably, exerting oneself of two dryers coordinated in described dry coal storehouse, and stable to ensure coal pulverizer coal supply, the volume in described dry coal storehouse is configured to the volume of four hours coals of exerting oneself of corresponding coal pulverizer.
The invention also discloses the implementation methods of the brown coal drying power generation system that in a kind of coal, water reclaims, comprise the brown coal drying power generation system that in coal as above, water reclaims, the implementation process of this brown coal drying power generation system comprises following process step:
S1, the each parts in the brown coal drying power generation system that in coal, water reclaims connect by reasonable, and form brown coal drying pulverizing system and the Steam Turbine Regenerative System that in coal, water reclaims.
S2, water content is 35%～50%, the brown coal of granularity≤20mm enter the drying tube of dryer through coal-feeding conveyer from run coal bin, dryer adopts low-pressure superheated steam as drying medium, brown coal are dried, dried brown coal enter dry coal storehouse and send into coal pulverizer, and the water vapor evaporating in brown coal is apparatus for recovering recovery in deduster filtration enters coal under the effect of air carrier.
In above-mentioned arbitrary technological scheme preferably, in step S1, this system adopts two dryers, a dry coal storehouse and a coal pulverizer, and two dryers are oppositely disposed in above dry coal storehouse, boiler room, dry coal storehouse coal dropping port connects coal pulverizer, and brown coal drying system, pulverizing system are concentrated to integral arrangement.
In above-mentioned arbitrary technological scheme, preferably, in step S2, the outlet of pipe drier dry coal adds rotary sealing material-feeding valve.
In above-mentioned arbitrary technological scheme, preferably, in step S2, pipe drier condensate outlet adds STEAM TRAP, Multi-channel network sharer.
In above-mentioned arbitrary technological scheme, preferably, in step S2, drying system adopts humiture transducer, gas content ANALYZER on-line monitoring dew point temperature, CO concentration and O
2concentration.
In above-mentioned arbitrary technological scheme, preferably, in the time that dew point temperature is too high, increase deduster exhausting amount; As CO, O
2while exceeding standard, in deduster, spray into inert gas; To ensure drying production line safe and stable operation.
In above-mentioned arbitrary technological scheme, preferably, dew point temperature is controlled at 70～80 DEG C, O
2volume content is controlled at below 12Vol%, and CO concentration is controlled at below 80ppm.
Brown coal drying power generation system and implementation methods thereof that in coal of the present invention, water reclaims, brown coal drying power generation system comprises boiler, steam turbine, feed water pump, vapour condenser, coal pulverizer, coal pulverizer is connected with boiler, boiler connects steam turbine by pipeline, steam turbine is connected with vapour condenser, and vapour condenser connects feed water pump by pipeline; Brown coal drying power generation system also comprises apparatus for recovering in brown coal drying device, coal, and run coal bin, low-pressure heater, oxygen-eliminating device, high-pressure heater, condensate pump, steam heater; Brown coal drying device is connected with apparatus for recovering, run coal bin, low-pressure heater, oxygen-eliminating device, high-pressure heater, condensate pump, steam heater in coal, and the composition brown coal drying power generation system that is connected with boiler, steam turbine, feed water pump, vapour condenser, coal pulverizer; By brown coal drying device and boiler integral arrangement are designed, in coal, apparatus for recovering combines with Steam Turbine Regenerative System, realizes the operation of large capacity brown coal generator set.
Brown coal drying power generation system and implementation methods thereof that in coal of the present invention, water reclaims, feed water pump comprises low pressure feed water pump and high pressure water pump, run coal bin is connected by coal-feeding conveyer with dryer, discharge hole of drying machine is connected with dry coal storehouse, dryer condensate outlet is connected with drainer, the outlet of dryer moisture is connected with deduster, deduster coal dropping port is connected with dry coal storehouse, dry coal storehouse is connected by coal-feeding conveyer with coal pulverizer, coal pulverizer is connected with boiler, Boiler Steam outlet is connected with steam turbine by pipeline, turbine discharge is connected with vapour condenser, vapour condenser water outlet connects low pressure feed water pump successively by pipeline, low-pressure heater is to oxygen-eliminating device, oxygen-eliminating device water outlet connects high pressure water pump successively, high-pressure heater is to boiler feed water entrance, composition brown coal drying power generation system, steam turbine low-pressure extraction opening is connected to steam heater, and low-pressure pumping steam and water are mixed into drying apparatus, and in drainer, condensation water is sent into oxygen-eliminating device by condensate pump, moisture after filtering by deduster enters apparatus for recovering in coal, and in coal, recycle-water enters Waste Water Treatment by pipeline, and weary gas is disposed to atmosphere, low pressure feed water pump discharge is connected to apparatus for recovering in coal, and boiler feed water enters heat regenerative system again through apparatus for recovering in coal.
Wherein, dryer is two, and two dryer positioned opposite share a dry coal storehouse, supply a coal pulverizer; Dryer is arranged in above coal pulverizer, brown coal drying with boiler milling system integral arrangement in boiler room.Dryer is pipe drier, and coal is walked in pipe, and steam is walked in housing, coal and vapour indirect heat exchange.The required dry heat of dryer is from water and the steam turbine low-pressure mixed steam that draws gas, and pressure is 0.4～0.65MPaA, and temperature is 150～175 DEG C.The condensed fluid of two dryers of positioned opposite reclaims and shares a drainer, and condensed fluid enters oxygen-eliminating device by condensate pump.Deduster is sack cleaner, and two dryers of positioned opposite share a deduster.In coal, apparatus for recovering adopts finned heat exchanger, and the steam of separating out in coal reclaims by boiler feed water condensation.Exerting oneself of two dryers coordinated in dry coal storehouse, and stable to ensure coal pulverizer coal supply, the volume in described dry coal storehouse is configured to the volume of four hours coals of exerting oneself of corresponding coal pulverizer.
The implementation methods of the brown coal drying power generation system that in coal of the present invention, water reclaims, by water content be 35%～50%, the brown coal of granularity≤20mm enter the drying tube of dryer through coal-feeding conveyer from run coal bin, dryer adopts low-pressure superheated steam as drying medium, brown coal are dried, dried brown coal enter dry coal storehouse and send into coal pulverizer, and the water vapor evaporating in brown coal is apparatus for recovering recovery in deduster filtration enters coal under the effect of air carrier.In the processing procedure of brown coal drying power generation system, the outlet of pipe drier dry coal adds rotary sealing material-feeding valve, pipe drier condensate outlet adds STEAM TRAP, Multi-channel network sharer, and drying system adopts humiture transducer, gas content ANALYZER on-line monitoring dew point temperature, CO concentration and O
2concentration.In the time that dew point temperature is too high, increase deduster exhausting amount; As CO, O
2while exceeding standard, in deduster, spray into inert gas; To ensure drying production line safe and stable operation.Dew point temperature is controlled at 70～80 DEG C, O
2volume content is controlled at below 12Vol%, and CO concentration is controlled at below 80ppm.
Compared with prior art, adopt brown coal drying power generation system and implementation methods thereof that in coal of the present invention, water reclaims, can improve boiler thermal output approximately 2%, extracted steam from turbine is dry, reduce cold junction heat waste and fail to keep an appointment 2.5%, station service power consumption rate reduces approximately 0.8%, and generating standard coal consumption reduces about 8g/ (kWh), and a 1000MW unit reclaims the about 120t/h of the water yield.
Brown coal drying power generation system and implementation methods thereof that in coal of the present invention, water reclaims, the dry contact drying mode that adopts, has solved the unsafe problems that convection drying brings, and coal is distributed in more drying tube, and rate of drying is fast, dry moderate; In system, abandoned traditional brown coal drying mode that independent factory building arranges of generating electricity, adopted boiler room integral arrangement, reduced dry coal and carry flow process, security of system improves, and operating cost lowers greatly.
Adopt brown coal drying power generation system and implementation methods thereof that in coal of the present invention, water reclaims, can reach effect efficient, energy-conservation, that economize on water, reduce discharging, meet the policy of national development low-carbon economy.
Brief description of the drawings
Fig. 1 is according to system architecture and the implementation process schematic diagram of the brown coal drying power generation system of water recovery in coal of the present invention and a preferred embodiment of implementation methods thereof;
Reference character:
1a, 1b-run coal bin, 2a, 2b, 2c-coal-feeding conveyer, 3a, 3b-dryer, 4-dry coal storehouse, 5-drainer, 6-deduster, 7-coal pulverizer, apparatus for recovering in 8-coal, 9-boiler, 10-steam turbine, 11-vapour condenser, 12-low pressure feed water pump, 13-low-pressure heater, 14-oxygen-eliminating device, 15-high pressure water pump, 16-high-pressure heater, 17-condensate pump, 18-steam heater.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is elaborated, below describe only conduct demonstration and explain, the present invention is not done to any pro forma restriction.
As shown in Figure 1, boiler 9 and steam turbine 10, low pressure feed water pump 12, high pressure water pump 15, vapour condenser 11, coal pulverizer 7, brown coal drying device, apparatus for recovering 8 in coal, run coal bin, low-pressure heater 13, oxygen-eliminating device 14, high-pressure heater 16, condensate pump 17, steam heater 18 forms brown coal drying power generation system, its brown coal drying device comprises again dryer, coal-feeding conveyer, dry coal storehouse 4, drainer 5, deduster 6, by by brown coal drying device, apparatus for recovering and the design of boiler integral arrangement in coal, in coal, apparatus for recovering combines with Steam Turbine Regenerative System, realize the operation of large capacity brown coal generator set.
Run coal bin 1a, 1b are connected by coal-feeding conveyer 2a, 2b with dryer 3a, 3b, and two discharge hole of drying machines are connected with dry coal storehouse 4; Two dryer condensation water outlets are connected with drainer 5, and two dryer moisture outlets are connected with deduster 6; Deduster coal dropping port is connected with dry coal storehouse, and dry coal storehouse is connected by coal-feeding conveyer 2c with coal pulverizer 7; Coal pulverizer is connected with boiler 9, and Boiler Steam outlet is connected with steam turbine 10 by pipeline; Steam turbine relief opening is connected with vapour condenser 11, and vapour condenser outlet connects low pressure feed water pump 12, low-pressure heater 13 to oxygen-eliminating device 14 successively by pipeline; Oxygen-eliminating device outlet connects high pressure water pump 15, high-pressure heater 16 successively to boiler feed water entrance, composition brown coal drying power generation system; Steam turbine low-pressure extraction opening is connected to steam heater 18, and low-pressure pumping steam and water are mixed into drying apparatus, and in drainer, condensation water is sent into oxygen-eliminating device by condensate pump 17; Moisture after filtering by deduster enters apparatus for recovering 8 in coal, and in coal, recycle-water enters Waste Water Treatment by pipeline, and weary gas is disposed to atmosphere; Low pressure feed water pump discharge is connected to apparatus for recovering in coal, and boiler feed water enters heat regenerative system again through apparatus for recovering in coal.
Adopt brown coal drying power generation system as above, its implementation methods is:
Adopt the corresponding dry coal storehouse 4 of two dryer 3a, 3b and coal pulverizer 7, two dryers to be oppositely disposed in above dry coal storehouse, boiler room, dry coal storehouse coal dropping port connects coal pulverizer; Drying system, pulverizing system are concentrated integral arrangement, simplify brown coal drying generating flow process, reduce dry coal conveying process simultaneously, and Security improves, and operating cost reduces.
By water content be 35%～50%, granularity is≤brown coal of 20mm enter dryer 3a, 3b drying tube by coal-feeding conveyer 2a, 2b from run coal bin 1a, 1b; Drying medium (low-pressure superheated steam) enters in dryer cylindrical shell and carries out heat exchange, and the condensed fluid after heat exchange enters drainer 5, enters oxygen-eliminating device 14 by condensate pump 17; Dried coal enters dry coal storehouse 4, enters coal pulverizer 7 by coal-feeding conveyer 2c, finally enters boiler burning.
The water vapor evaporating in coal enters deduster 6 and filters under the effect of air carrier, enters apparatus for recovering 8 in coal and reclaim after filtration, and weary gas enters atmosphere, and the coal dust under filtering enters dry coal storehouse 4 through fuel dropping pipe.
Drying system adopts humiture transducer, gas content ANALYZER on-line monitoring dew point temperature, CO concentration and O
2concentration; In the time that dew point temperature is too high, increase deduster exhausting amount; As CO, O
2while exceeding standard, in deduster, spray into inert gas (as: nitrogen).
Drying system is exerted oneself by regulating coal-feeding conveyer 2a, 2b and dryer 3a, 3b rotating speed to realize, and for reaching the dry coal of requirement quality, also answers steam regulation amount simultaneously.
In coal, apparatus for recovering 8 coolant medias adopt boiler feed water, and boiler feed water is first installed through this, and then enters low-pressure heating system.In order to reach good heat transfer effect, mode of execution is for adopting finned heat exchanger preferably.Finned heat exchanger takes to make leave with rage shell side, and water is walked tube side; Centre adds deflection plate, force air-flow repeatedly cross-flow by tube bank, its compact structure, heat transfer efficiency is high, indirect heat exchange does not affect boiler feed water quality.
Drying medium is to adopt the draw gas steam of 150～175 DEG C of mixed pressure 0.4～0.65MPaA, temperature of water and steam turbine low-pressure.The extracted steam from turbine difficult parameters of conventional design to be to meet dry desired steam condition, for this reason, draws gas and added water after mixing and can be reached requirement by steam heater 18.
The brown coal drying power generation system that in this coal, water reclaims, its run coal bin is connected by coal-feeding conveyer with dryer, discharge hole of drying machine, condensate outlet, moisture outlet respectively with dry coal storehouse, drainer, deduster connects, deduster coal dropping port, moisture outlet respectively with dry coal storehouse, in coal, apparatus for recovering connects, dry coal storehouse is connected by coal-feeding conveyer with coal pulverizer, coal pulverizer is connected with boiler, Boiler Steam outlet is connected with steam turbine, steam turbine relief opening is connected with vapour condenser, vapour condenser water outlet connects low pressure feed water pump successively by pipeline, low-pressure heater is to oxygen-eliminating device, oxygen-eliminating device water outlet connects high pressure water pump successively, high-pressure heater is to boiler feed water entrance.This invention organically combines brown coal drying with thermal power generation system, brown coal drying integral arrangement is in boiler room, and extracted steam from turbine, as drying medium, adopts boiler feed water to reclaim water in coal, for the realization of large capacity brown coal generator set provides a kind of method.
The brown coal drying power generation system that in this coal, water reclaims, the appliance arrangement comprising has: apparatus for recovering, boiler, steam turbine, vapour condenser, low pressure feed water pump, low-pressure heater, oxygen-eliminating device, high pressure water pump, high-pressure heater, condensate pump, steam heater in run coal bin, coal-feeding conveyer, dryer, dry coal storehouse, drainer, deduster, coal pulverizer, coal, run coal bin is connected by coal-feeding conveyer with dryer, discharge hole of drying machine is connected with dry coal storehouse, dryer condensate outlet is connected with drainer, the outlet of dryer moisture is connected with deduster, deduster coal dropping port is connected with dry coal storehouse, dry coal storehouse is connected by coal-feeding conveyer with coal pulverizer, coal pulverizer is connected with boiler, Boiler Steam outlet is connected with steam turbine by pipeline, steam turbine relief opening is connected with vapour condenser, vapour condenser water outlet connects low pressure feed water pump successively by pipeline, low-pressure heater is to oxygen-eliminating device, oxygen-eliminating device water outlet connects high pressure water pump successively, high-pressure heater is to boiler feed water entrance, composition brown coal drying power generation system, steam turbine low-pressure extraction opening is connected to steam heater, and low-pressure pumping steam and water are mixed into drying apparatus, and in drainer, condensation water is sent into oxygen-eliminating device by condensate pump, moisture after filtering by deduster enters apparatus for recovering in coal, and in coal, recycle-water enters Waste Water Treatment by pipeline, and weary gas is disposed to atmosphere, low pressure feed water pump discharge is connected to apparatus for recovering in coal, and boiler feed water enters heat regenerative system again through apparatus for recovering in coal.The dryer of this system is two, two dryer positioned opposite, share a dry coal storehouse, supply a coal pulverizer, dryer is arranged in above coal pulverizer, brown coal drying with boiler milling system integral arrangement in boiler room.Dryer adopts pipe drier, and coal is walked in pipe, and steam is walked in housing, coal and vapour indirect heat exchange.The required dry heat of dryer is from water and the steam turbine low-pressure mixed steam that draws gas, pressure 0.4～0.65MPaA, 150～175 DEG C of temperature.Two dryer condensed fluids of positioned opposite reclaim and share a drainer, and condensed fluid enters oxygen-eliminating device by condensate pump.Deduster adopts sack cleaner, and two dryers of positioned opposite share a deduster.In coal, apparatus for recovering adopts finned heat exchanger, and the steam of separating out in coal reclaims by boiler feed water condensation.Exerting oneself of two dryers can be coordinated in dry coal storehouse, ensures that coal pulverizer coal supply is stable, and its volume is the volume of four hours coals of exerting oneself of corresponding coal pulverizer.Brown coal drying technique is: water content is 35%～50%, the brown coal of granularity≤20mm fall into dryer drying tube from run coal bin through coal-feeding conveyer, dryer adopts low-pressure superheated steam as drying medium, coal is dried, and dried coal enters dry coal storehouse and sends into coal pulverizer; The water vapor evaporating in coal is apparatus for recovering recovery in deduster filtration enters coal under the effect of air carrier.The outlet of pipe drier dry coal adds rotary sealing material-feeding valve, pipe drier condensate outlet adds STEAM TRAP, Multi-channel network sharer, for ensureing drying production line safe and stable operation, drying system adopts humiture transducer, gas content ANALYZER on-line monitoring dew point temperature, CO concentration and O
2concentration; In the time that dew point temperature is too high, increase deduster exhausting amount; As CO, O
2while exceeding standard, in deduster, spray into inert gas (as: nitrogen).Dew point temperature is controlled at 70～80 DEG C, O
2volume content is controlled at below 12Vol%, and CO concentration is controlled at below 80ppm.
At each technical characteristics described in above-mentioned embodiment, in reconcilable situation, can combine by any suitable mode, for avoiding repetition, the present invention to various possible compound modes not in explanation separately.
The above is only that the preferred embodiment of the present invention is described; not that scope of the present invention is limited; design under the prerequisite of spirit not departing from the present invention; various distortion and improvement that the common engineers and technicians in related domain make technological scheme of the present invention, all should fall in the definite protection domain of claims of the present invention.
Claims (10)
1. the brown coal drying power generation system that in a coal, water reclaims, comprise boiler, steam turbine, feed water pump, vapour condenser, coal pulverizer, coal pulverizer is connected with boiler, boiler connects steam turbine by pipeline, steam turbine is connected with vapour condenser, vapour condenser connects feed water pump by pipeline, it is characterized in that: this system also comprises apparatus for recovering in brown coal drying device, coal, and run coal bin, low-pressure heater, oxygen-eliminating device, high-pressure heater, condensate pump, steam heater; Described brown coal drying device is connected with apparatus for recovering, run coal bin, low-pressure heater, oxygen-eliminating device, high-pressure heater, condensate pump, steam heater in coal, and the composition brown coal drying power generation system that is connected with boiler, steam turbine, feed water pump, vapour condenser, coal pulverizer; By brown coal drying device and boiler integral arrangement are designed, in coal, apparatus for recovering combines with Steam Turbine Regenerative System, realizes the operation of large capacity brown coal generator set.
2. the brown coal drying power generation system that in coal as claimed in claim 1, water reclaims, is characterized in that: described feed water pump comprises low pressure feed water pump and high pressure water pump.
3. the brown coal drying power generation system that in coal as claimed in claim 1, water reclaims, it is characterized in that: described brown coal drying device comprises dryer, coal-feeding conveyer, dry coal storehouse, drainer, deduster, described dryer is connected with coal-feeding conveyer, dry coal storehouse, drainer, deduster.
4. the brown coal drying power generation system that in coal as claimed in claim 1, water reclaims, is characterized in that: described run coal bin is connected by coal-feeding conveyer with dryer, the discharge port of dryer is connected with dry coal storehouse.
5. the brown coal drying power generation system that in coal as claimed in claim 3, water reclaims, is characterized in that: the condensate outlet of described dryer is connected with drainer, and the moisture outlet of dryer is connected with deduster.
6. an implementation methods for the brown coal drying power generation system that in coal, water reclaims, comprises the brown coal drying power generation system that in the coal as described in claim 1 to 5, water reclaims, and it is characterized in that: the implementation process of this brown coal drying power generation system comprises following process step:
S1, the each parts in the brown coal drying power generation system that in coal, water reclaims connect by reasonable, and form brown coal drying pulverizing system and the Steam Turbine Regenerative System that in coal, water reclaims;
S2, water content is 35%～50%, the brown coal of granularity≤20mm enter the drying tube of dryer through coal-feeding conveyer from run coal bin, dryer adopts low-pressure superheated steam as drying medium, brown coal are dried, dried brown coal enter dry coal storehouse and send into coal pulverizer, and the water vapor evaporating in brown coal is apparatus for recovering recovery in deduster filtration enters coal under the effect of air carrier.
7. the implementation methods of the brown coal drying power generation system that in coal as claimed in claim 6, water reclaims, it is characterized in that: as in step S1, system adopts two dryers, a dry coal storehouse and a coal pulverizer, two dryers are oppositely disposed in above dry coal storehouse, boiler room, dry coal storehouse coal dropping port connects coal pulverizer, and brown coal drying system, pulverizing system are concentrated to integral arrangement.
8. the implementation methods of the brown coal drying power generation system that in coal as claimed in claim 6, water reclaims, is characterized in that: in step S2, the outlet of pipe drier dry coal adds rotary sealing material-feeding valve.
9. the implementation methods of the brown coal drying power generation system that in coal as claimed in claim 6, water reclaims, is characterized in that: in step S2, pipe drier condensate outlet adds STEAM TRAP, Multi-channel network sharer.
10. the implementation methods of the brown coal drying power generation system that in coal as claimed in claim 6, water reclaims, is characterized in that: in step S2, drying system adopts humiture transducer, gas content ANALYZER on-line monitoring dew point temperature, CO concentration and O
2concentration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410405778.0A CN104179537B (en) | 2014-08-18 | 2014-08-18 | Brown coal drying power generating system capable of recycling water in coal and implementation method of brown coal drying power generating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410405778.0A CN104179537B (en) | 2014-08-18 | 2014-08-18 | Brown coal drying power generating system capable of recycling water in coal and implementation method of brown coal drying power generating system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104179537A true CN104179537A (en) | 2014-12-03 |
| CN104179537B CN104179537B (en) | 2017-01-25 |
Family
ID=51960850
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410405778.0A Active CN104179537B (en) | 2014-08-18 | 2014-08-18 | Brown coal drying power generating system capable of recycling water in coal and implementation method of brown coal drying power generating system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104179537B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105402753A (en) * | 2015-12-23 | 2016-03-16 | 无锡华光新动力环保科技股份有限公司 | Flue gas purifying system for removing white smoke plume of power plant chimney |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101821483A (en) * | 2007-05-16 | 2010-09-01 | Rwe动力股份公司 | Method for operating a steam turbine power plant and also device for generating steam |
| CN101881191A (en) * | 2010-05-27 | 2010-11-10 | 中国电力工程顾问集团公司 | Thermal power generation system based on high-moisture lignite pre-drying upgrading and recovering technology |
| CN102155744A (en) * | 2010-12-22 | 2011-08-17 | 上海锅炉厂有限公司 | System for pre-drying coal with high water content by utilizing residual heat of boiler gas |
| CN102191956A (en) * | 2010-03-04 | 2011-09-21 | 天华化工机械及自动化研究设计院 | Method for reducing coal consumption of coal fired power plant by arranging steam pipe type drying system |
| CN102188863A (en) * | 2010-03-04 | 2011-09-21 | 天华化工机械及自动化研究设计院 | Process for preventing fogging and explosion of coal dried tail gas in dry bag-type dust removal process |
| CN102759259A (en) * | 2012-07-12 | 2012-10-31 | 西安交通大学 | Brown coal upgrading-power generation co-production system |
| CN102944024A (en) * | 2012-11-09 | 2013-02-27 | 中国神华能源股份有限公司 | Lignite thermal power generation system |
| CN103277155A (en) * | 2013-05-20 | 2013-09-04 | 华北电力大学 | Brown coal pre-drying-air preheating-waste heat utilization composite coal-fired power generation system |
| CN103822441A (en) * | 2012-11-16 | 2014-05-28 | 天华化工机械及自动化研究设计院有限公司 | Coal drying method through inert gas circulating |
| CN204041130U (en) * | 2014-08-18 | 2014-12-24 | 北京电力设备总厂 | The brown coal drying power generation system of Water Sproading in a kind of coal |
-
2014
- 2014-08-18 CN CN201410405778.0A patent/CN104179537B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101821483A (en) * | 2007-05-16 | 2010-09-01 | Rwe动力股份公司 | Method for operating a steam turbine power plant and also device for generating steam |
| CN102191956A (en) * | 2010-03-04 | 2011-09-21 | 天华化工机械及自动化研究设计院 | Method for reducing coal consumption of coal fired power plant by arranging steam pipe type drying system |
| CN102188863A (en) * | 2010-03-04 | 2011-09-21 | 天华化工机械及自动化研究设计院 | Process for preventing fogging and explosion of coal dried tail gas in dry bag-type dust removal process |
| CN101881191A (en) * | 2010-05-27 | 2010-11-10 | 中国电力工程顾问集团公司 | Thermal power generation system based on high-moisture lignite pre-drying upgrading and recovering technology |
| CN102155744A (en) * | 2010-12-22 | 2011-08-17 | 上海锅炉厂有限公司 | System for pre-drying coal with high water content by utilizing residual heat of boiler gas |
| CN102759259A (en) * | 2012-07-12 | 2012-10-31 | 西安交通大学 | Brown coal upgrading-power generation co-production system |
| CN102944024A (en) * | 2012-11-09 | 2013-02-27 | 中国神华能源股份有限公司 | Lignite thermal power generation system |
| CN103822441A (en) * | 2012-11-16 | 2014-05-28 | 天华化工机械及自动化研究设计院有限公司 | Coal drying method through inert gas circulating |
| CN103277155A (en) * | 2013-05-20 | 2013-09-04 | 华北电力大学 | Brown coal pre-drying-air preheating-waste heat utilization composite coal-fired power generation system |
| CN204041130U (en) * | 2014-08-18 | 2014-12-24 | 北京电力设备总厂 | The brown coal drying power generation system of Water Sproading in a kind of coal |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105402753A (en) * | 2015-12-23 | 2016-03-16 | 无锡华光新动力环保科技股份有限公司 | Flue gas purifying system for removing white smoke plume of power plant chimney |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104179537B (en) | 2017-01-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102992575B (en) | Steam thermal cycle sludge drying method and system | |
| CN103575077B (en) | A kind of Multi-layer belt type drying system | |
| CN204041130U (en) | The brown coal drying power generation system of Water Sproading in a kind of coal | |
| CN203116490U (en) | Brown coal drying and combusting system with gas exhaust heat energy and water recovery function | |
| CN103708702B (en) | Energy-saving sludge drying device by utilizing recovery waste heat of vapor compression | |
| CN102759253B (en) | Flue gas fluidized bed lignite drying system provided with internal heat source and integrated to heat-engine plant | |
| CN104017594B (en) | Coal low-temperature cracking process | |
| CN102679689B (en) | Low energy consumption, low emission, coal quality guaranteed and safe drying method and device for chemical feed coal | |
| CN107269335A (en) | The rubbish and gas combustion-gas vapor combined cycle system of a kind of use combustion gas garbage drying | |
| CN104150732A (en) | Two-stage sludge drying system | |
| CN203629203U (en) | Superheat steam drying device | |
| CN102650493B (en) | Device and technology for drying lignite by jointly using rotary steam tubes and high frequency | |
| CN203048755U (en) | Steam heat-cycling sludge drying system | |
| CN102759257A (en) | Biomass drying system applied to biomass power generation system | |
| CN103822439B (en) | One utilizes surplus heat of power plant to carry out pre-dried system and method to brown coal | |
| CN103983088A (en) | System and method for predrying lignite and recycling water by using waste heat of power station | |
| CN104179537A (en) | Brown coal drying power generating system capable of recycling water in coal and implementation method of brown coal drying power generating system | |
| CN103939158A (en) | Low-rank coal purification power generation system | |
| CN203653403U (en) | Dyeing sludge drying equipment | |
| CN203960020U (en) | A kind of system of utilizing the dry municipal sludge of surplus heat of power plant coupled solar | |
| CN204240347U (en) | Superheat steam drying powder process type coal generating system | |
| CN104045217A (en) | Municipal sludge drying system utilizing power plant waste heat coupling solar energy | |
| CN104329667A (en) | Superheated steam drying power-making coal-fired power generation system | |
| CN103673534A (en) | Brown coal drying water-lifting recycling system using waste heat of power plant | |
| CN104710094A (en) | Printing and dyeing sludge drying method and apparatus thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C53 | Correction of patent of invention or patent application | ||
| CB02 | Change of applicant information |
Address after: 102401 Beijing City, Fangshan District Liangxiang Haotian Street No. 12 Applicant after: Co., Ltd of Beijing Electrical Equipment Factory Address before: 102401 Beijing City, Fangshan District Liangxiang Haotian Street No. 12 Applicant before: Beijing Electric Power Equipment General Factory |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: APPLICANT; FROM: BEIJING POWER EQUIPMENT GENERAL PLANT TO: BEIJING ELECTRIC POWER EQUIPMENT GENERAL FACTORY CO., LTD. |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |