CN105276608B - A kind of brown coal drying waste heat and water reclamation system - Google Patents
A kind of brown coal drying waste heat and water reclamation system Download PDFInfo
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- CN105276608B CN105276608B CN201510750585.3A CN201510750585A CN105276608B CN 105276608 B CN105276608 B CN 105276608B CN 201510750585 A CN201510750585 A CN 201510750585A CN 105276608 B CN105276608 B CN 105276608B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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Abstract
The invention discloses a kind of brown coal drying waste heat and water reclamation system, wherein, raw coal enters drying machine through feeder, former moisture in coal vaporizes after being absorbed heat in drying machine, raw coal is changed into dry coal, drying machine lack of gas enter sack cleaner and carry out dedusting, and the coal dust isolated is ground by powder sinking tube together with dry coal into coal pulverizer row；The lack of gas of sack cleaner outlet enter coagulating type heat exchanger, emptied after completing heat exchange with recirculated cooling water in coagulating type heat exchanger, recycle-water is exported from coagulating type heat exchanger and utilized, recirculated cooling water after heating enters primary and secondary air heater by pipeline, cold air carries out heat exchange in primary and secondary air heater with the recirculated cooling water after heating, cold air is heated, and hot primary and secondary air is heated into again subsequently into the air preheater in boiler flue；Recirculated cooling water after heat release turns again to the heat absorption of coagulating type heat exchanger, forms complete closed-loop system, while realize drying machine lack of gas waste heat and Water Sproading.
Description
Technical field：
The invention belongs to the waste heat recovery of drying brown coal lack of gas and application field, and in particular to a kind of brown coal drying waste heat and water
Recovery system.
Background technology：
Use caused by lignite predry drying system on the station boiler of drying brown coal existing, exchanged heat by coagulating type
When device reclaims to dry gas moisture, when using condensate as cooling medium in addition to recoverable lack of gas heat, adopt
During by the use of recirculated water as cooling medium it is multipair its by the way of Air-Cooling Island cooling, the heat of recirculated water largely scatters and disappears and not obtained
Rationally utilize, thus cause substantial amounts of energy waste.
To improve the economy with the predrying system unit of lignite, units consumption is further reduced while water saving, is needed
Develop a kind of new drying machine lack of gas heat recovery system.
The content of the invention：
It is an object of the invention to for above-mentioned the deficiencies in the prior art, there is provided a kind of brown coal drying waste heat and Water Sproading
System.
To reach above-mentioned purpose, the present invention, which adopts the following technical scheme that, to be achieved：
A kind of brown coal drying waste heat and water reclamation system, including feeder, circulating cooling water pump, primary air fan and air-supply
Machine, wherein, feeder outlet is connected to drying machine raw coal entrance, and the outlet of drying machine dry coal is connected to coal pulverizer inlet, coal pulverizer
Outlet is connected to the burner of boiler, and the outlet of drying machine lack of gas is connected to sack cleaner entrance, and sack cleaner is provided with coal
Powder exports and lack of gas outlet, its discharge are connected to coal pulverizer inlet, and the outlet of its lack of gas is connected to coagulating type heat exchanger entrance,
Coagulating type heat exchanger is provided with recovery water out and lack of gas outlet；
Primary air fan and pressure fan outlet by First air heater, Secondary Air heater and are arranged on boiler flue respectively
Interior air preheater First air entrance is connected with Secondary Air entrance, and the wind of heat one, the hot Secondary Air of air preheater outlet are done for coal pulverizer
Dry wind and boiler combustion hot blast；
Circulating cooling water pump is by pipeline through coagulating type heat exchanger and the First air heater and Secondary Air that are arranged in parallel
Heater forms a cooling water recirculation system.
Further improve of the invention is that sack cleaner lack of gas export the pipeline for being connected to coagulating type heat exchanger entrance
On be provided with excessive fan.
Further improve of the invention is, includes the receipts water tank of recovery recycle-water.
Further improve of the invention is, in addition to is used for the coal bunker that raw coal is provided for feeder.
Further improve of the invention is that boiler flue exit is provided with electric cleaner, electric cleaner outlet connection
To air-introduced machine entrance.
Further improve of the invention is, is additionally provided with and is used for back in the boiler flue between air preheater and electric cleaner
Receive the low-pressure coal saver of fume afterheat.
Further improve of the invention is that raw coal enters drying machine through feeder, and former moisture in coal is inhaled in drying machine
The heat for receiving steam in steam pipe is gasified, and raw coal is changed into dry coal, and the lack of gas rich in water vapour and the coal dust containing finite concentration are entered
Enter sack cleaner and carry out dedusting, the coal dust isolated is entered by powder sinking tube together with the dry coal that drying machine exports into coal pulverizer
Row is ground, and qualified coal dust is burnt by pulverized coal feed pipe into boiler-burner；
The lack of gas of sack cleaner outlet enter coagulating type heat exchanger, are completed in coagulating type heat exchanger with recirculated cooling water
Emptied after heat exchange, recycle-water is exported from coagulating type heat exchanger and utilized, and the recirculated cooling water after heating is entered once by pipeline
Wind heater, Secondary Air heater, medium is the recirculated cooling water after heating in First air heater, Secondary Air heater tube,
Outer pipe is the First air from primary air fan and pressure fan, Secondary Air, and cold air is in First air heater, Secondary Air heater
Heat exchange is carried out with the recirculated cooling water after heating, cold air is heated, added again subsequently into the air preheater in boiler flue
Then heat is used as coal pulverizer dry wind and boiler combustion hot blast into heat primary air, hot Secondary Air, heat primary air, hot Secondary Air；
Recirculated cooling water after heat release turns again to the heat absorption of coagulating type heat exchanger, forms cooling to lack of gas, forms complete closed-loop system,
Realize drying machine lack of gas waste heat and Water Sproading simultaneously.
Relative to prior art, the present invention has following beneficial effect：
A kind of brown coal drying waste heat of the present invention and water reclamation system, inhaled using closed-type circulating cooling water in coagulating type heat exchanger
Heat recovery brown coal drying machine lack of gas waste heat is received, heated recirculated water is passed through the cold primary and secondary air heater pair of boiler
For the preheating of air preheater entrance cold wind so as to reclaim recirculated water heat, the recirculated water that heat release is completed finally is returned to coagulating type heat exchange
Device absorbs heat to form circulation.
Using the brown coal drying waste heat and apparatus for recovering and system, the heat of brown coal drying lack of gas can be effectively reclaimed,
Cooling water is neither wasted, the water in drying brown coal lack of gas can be reclaimed again, can also further improve brown coal drying unit generation
Economy.
Brief description of the drawings：
Fig. 1 is a kind of brown coal drying waste heat of the present invention and the structured flowchart of water reclamation system.
In figure：1 is coal bunker, and 2 be feeder, and 3 be drying machine, and 4 be coal pulverizer, and 5 be sack cleaner, and 6 be excessive fan,
7 be coagulating type heat exchanger, and 8 is receive water tank, and 9 be boiler, and 10 be circulating cooling water pump, and 11 be air preheater, and 12 be low-pressure coal saver,
13 be electric cleaner, and 14 be air-introduced machine, and 15 be First air heater, and 16 be Secondary Air heater, and 17 be primary air fan, and 18 be to send
Blower fan.
Embodiment：
Below in conjunction with accompanying drawing, the present invention is described in further detail.
Referring to Fig. 1, a kind of brown coal drying waste heat of the present invention and water reclamation system, its key problem in technology be it is following some：
1) present invention is mainly by coal bunker 1, feeder 2, steam pipe swinging brown coal drying machine 3, sack cleaner 5, lack of gas
The drying brown coal generation system that blower fan 6 forms, drying brown coal pulverized coal preparation that coal pulverizer 4, boiler 9 form and using system are coagulated
Eliminant heat exchanger 7, circulating cooling water pump 10, First air heater 15, Secondary Air heater 16, primary air fan 17, pressure fan 18
Deng the lack of gas waste heat and water reclamation system of composition, and air preheater 11, low-pressure coal saver 12, electric cleaner 13, air-introduced machine 14 etc.
Boiler auxiliaries forms.
2) in the present invention, coal bunker 1 is used to be the coal supply of feeder 2, and the raw coal of the outlet connection drying machine 3 of feeder 2 enters
Mouthful, the dry coal outlet connection coal pulverizer import of drying machine 3, the import of the lack of gas outlet connection sack cleaner 5 of drying machine 3, cloth
The coal dust that bag dust collector 5 is isolated connects the import of coal pulverizer 4, dry coal and coal dust by powder sinking tube and completes to grind in coal pulverizer 4
Enter the burner combustion of boiler 9 by pulverized coal feed pipe afterwards.Boiler smoke after burning flows successively through boiler furnace, air preheater
11st, low-pressure coal saver 12 and electric cleaner 13, are then discharged through air-introduced machine 14.
The entrance of the lack of gas outlet connection excessive fan 6 of sack cleaner 5, the outlet connection coagulating type of excessive fan 6 change
The entrance of hot device 7, lack of gas after recirculated cooling water completion heat exchange with emptying in the coagulating type heat exchanger 7, and recycle-water is from coagulating type
The bottom of heat exchanger 7 is exported to return water tank 8 and then utilized, and the recirculated cooling water after heating is added by pipeline into First air
Hot device 15, Secondary Air heater 16.
Cold air introduces from primary air fan 17 and the inlet conduits of pressure fan 18, and connection First air adds the outlet of two Fans respectively
The import of hot device 15, Secondary Air heater 16, cold air is in First air heater 15, Secondary Air heater 16 and after heating
Recirculated cooling water carries out heat exchange, and cold air is heated, heated again subsequently into the air preheater 11 of boiler 9, heat one, two
Then secondary wind is used as the dry wind of coal pulverizer 4 and the burning of boiler 9 with hot blast.
3) after the wind-warm syndrome of 11 import of air preheater first and second improves, to continue the waste heat during recovery boiler 9 is discharged fume, the row of preventing
Cigarette temperature is too high, boiler 9 need to before electric cleaner 13 flue arrangement heat-recoverable low-pressure coal saver 12, exhaust gas temperature is entered
One step is reduced to 90~110 DEG C.
4) smoke evacuation after cooling enters electric cleaner 13, can improve the efficiency of dust collection of electric cleaner 13, reduce dust pollution
Thing discharges.
In order to further increase the understanding to the present invention, an explanation now is done to its course of work：
Raw coal in coal bunker 1 enters drying machine 3 through coal spout and feeder 2, and former moisture in coal absorbs in drying machine 3 and steamed
The heat of steam is gasified in steam pipe, and raw coal is changed into dry coal, the drying machine lack of gas rich in water vapour and the coal dust containing finite concentration
Dedusting is carried out into sack cleaner 5, the coal dust isolated enters coal-grinding by powder sinking tube together with the dry coal that drying machine 3 exports
Machine 4 is ground, and qualified coal dust is burnt by pulverized coal feed pipe into boiler-burner.The lack of gas warp that sack cleaner 3 exports
Excessive fan 6 enters coagulating type heat exchanger 7, is emptied after completing heat exchange with recirculated cooling water in coagulating type heat exchanger 7, reclaims
Water is exported to return water tank 8 and then utilized from the bottom of coagulating type heat exchanger 7, and the recirculated cooling water after heating is entered by pipeline
Enter First air heater 15, Secondary Air heater 16.After First air heater 15, Secondary Air heater 16 manage interior medium as heating
Recirculated cooling water, pipe outer is the primary and secondary air from primary air fan 17 and pressure fan 18, and cold air is in First air heater
15th, heat exchange is carried out with the recirculated cooling water after heating in Secondary Air heater 16, cold air is heated, empty subsequently into boiler
Pre- device 11 is heated into hot primary and secondary air again, then hot primary and secondary air is used as the dry wind of coal pulverizer 4 and boiler combustion hot blast
Use.Recirculated cooling water after heat release turns again to coagulating type heat exchanger 7 and absorbs heat, forms cooling to lack of gas, complete so as to be formed
Closed-loop system, while realize the lack of gas waste heat of drying machine 3 and Water Sproading.
Because the import wind-warm syndrome of air preheater 11 improves, exhaust gas temperature rise, therefore, can be returned in front flue of dust collector arrangement
The Mist heat recovering of low-pressure coal saver 12 of heat is received, flue gas is discharged by electric cleaner 13, air-introduced machine 14 again after cooling.
Claims (2)
1. a kind of brown coal drying waste heat and water reclamation system, it is characterised in that including feeder (2), circulating cooling water pump (10),
Primary air fan (17) and pressure fan (18), wherein, feeder (2) outlet is connected to drying machine (3) raw coal entrance, drying machine (3)
Dry coal outlet is connected to coal pulverizer (4) entrance, and coal pulverizer (4) exports the burner for being connected to boiler (9), drying machine (3) lack of gas
Outlet is connected to sack cleaner (5) entrance, and sack cleaner (5) is provided with discharge and lack of gas export, its discharge
Coal pulverizer (4) entrance is connected to, the outlet of its lack of gas is connected to coagulating type heat exchanger (7) entrance, and coagulating type heat exchanger (7) is provided with
Reclaim water out and lack of gas outlet；
Primary air fan (17) and pressure fan (18) outlet are respectively by First air heater (15), Secondary Air heater (16) with setting
Air preheater (11) the First air entrance put in boiler (9) flue is connected with Secondary Air entrance, the heat one of air preheater (11) outlet
Wind, hot Secondary Air are used for coal pulverizer (4) dry wind and boiler (9) burning hot blast；
Circulating cooling water pump (10) by pipeline through coagulating type heat exchanger (7) and the First air heater (15) being arranged in parallel and
Secondary Air heater (16) forms a cooling water recirculation system；
The outlet of sack cleaner (5) lack of gas, which is connected on the pipeline of coagulating type heat exchanger (7) entrance, is provided with excessive fan (6)；
Electric cleaner (13) is provided with boiler (9) flue outlet, electric cleaner (13) outlet is connected to air-introduced machine (14) entrance；
The low pressure for Mist heat recovering is additionally provided with boiler (9) flue between air preheater (11) and electric cleaner (13)
Economizer (12)；
Also include the receipts water tank (8) of recovery recycle-water；
Also include being used for the coal bunker (1) that raw coal is provided for feeder (2).
2. a kind of brown coal drying waste heat according to claim 1 and water reclamation system, it is characterised in that raw coal is through feeder
(2) drying machine (3) is entered, the heat that former moisture in coal absorbs steam in steam pipe in drying machine (3) is gasified, and raw coal becomes
For dry coal, the lack of gas rich in water vapour and the coal dust containing finite concentration enter sack cleaner (5) and carry out dedusting, the coal dust isolated
Ground by powder sinking tube together with the dry coal that drying machine (3) exports into coal pulverizer (4), qualified coal dust passes through duff pipe
Road enters boiler (9) burner combustion；
The lack of gas of sack cleaner (3) outlet enter coagulating type heat exchanger (7), coagulating type heat exchanger (7) is interior and circulating cooling
Water is emptied after completing heat exchange, and recycle-water is exported from coagulating type heat exchanger (7) and utilized, and the recirculated cooling water after heating passes through pipeline
Into First air heater (15), Secondary Air heater (16), it is situated between in First air heater (15), Secondary Air heater (16) pipe
Matter is the recirculated cooling water after heating, and it is First air, Secondary Air from primary air fan (17) and pressure fan (18) that pipe is outer, cold sky
Gas carries out heat exchange, cold air in First air heater (15), Secondary Air heater (16) with the recirculated cooling water after heating
It is heated, heat primary air, hot Secondary Air is heated into again subsequently into the air preheater (11) in boiler (9) flue, heat primary air,
Then hot Secondary Air is used as coal pulverizer (4) dry wind and boiler combustion hot blast；Recirculated cooling water after heat release turns again to solidifying
Eliminant heat exchanger (7) heat absorption, cooling is formed to lack of gas, form complete closed-loop system, while realize more than drying machine (3) lack of gas
Heat and Water Sproading.
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| CN201510750585.3A CN105276608B (en) | 2015-11-06 | 2015-11-06 | A kind of brown coal drying waste heat and water reclamation system |
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| CN201510750585.3A CN105276608B (en) | 2015-11-06 | 2015-11-06 | A kind of brown coal drying waste heat and water reclamation system |
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| CN105276608B true CN105276608B (en) | 2018-01-09 |
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| CN105737129B (en) * | 2016-04-13 | 2018-05-25 | 华北电力大学 | The synthesis afterheat utilizing system of First air warm depth optimization |
| CN106247375A (en) * | 2016-08-30 | 2016-12-21 | 江苏太湖锅炉股份有限公司 | Single drum longitudinal biomass direct-fired chain-grate boiler system |
| CN106391309A (en) * | 2016-11-07 | 2017-02-15 | 航天长征化学工程股份有限公司 | System and method for recovering moisture in coal grinding drying tail gas |
| CN111829001A (en) * | 2020-06-03 | 2020-10-27 | 华电电力科学研究院有限公司 | System for reducing raw coal moisture and improving drying output of boiler pulverizing system |
| CN113446616A (en) * | 2021-07-28 | 2021-09-28 | 西安热工研究院有限公司 | Power generation system and method for directly burning and coupling biomass briquette fuel by using standby coal mill |
| CN114877305A (en) * | 2022-05-07 | 2022-08-09 | 西安交通大学 | Green power-coal power coupling power generation system and method utilizing renewable energy discarded power |
| CN115371380B (en) * | 2022-08-25 | 2024-06-11 | 沈阳铝镁设计研究院有限公司 | Method for cascade utilization of waste heat of steam pipe type dryer of gas station |
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| US9482127B2 (en) * | 2012-09-11 | 2016-11-01 | General Electric Technology Gmbh | Booster air heater for high moisture fuels |
| US9360211B2 (en) * | 2012-09-13 | 2016-06-07 | Mitsubishi Heavy Industries, Ltd. | Coal fired boiler plant and coal drying method for coal fired boiler plant |
| CN203116491U (en) * | 2013-03-18 | 2013-08-07 | 施大钟 | Lignite water take-out lignite efficient burning system |
| JP6195512B2 (en) * | 2013-12-02 | 2017-09-13 | 三菱日立パワーシステムズ株式会社 | Solid fuel pulverization apparatus and solid fuel pulverization method |
| CN204739580U (en) * | 2014-11-13 | 2015-11-04 | 上海理工大学 | Superheated steam drying powder process type coal fired boiler unit and power generation system |
| CN204240386U (en) * | 2014-11-13 | 2015-04-01 | 上海理工大学 | Superheat steam drying powder process type coal generating system |
| CN104930539B (en) * | 2015-06-29 | 2017-06-13 | 山东大学 | A kind of coal-fired plant flue gas heat regenerative system and the ultra-clean discharge method of energy-saving and water-saving |
| CN205102163U (en) * | 2015-11-06 | 2016-03-23 | 西安热工研究院有限公司 | Dry waste heat of brown coal and water recovery system |
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