CN209371292U - A kind of explosion-proof anti-coking type fanned powder-grinding system with flue gas waste heat recovery - Google Patents
A kind of explosion-proof anti-coking type fanned powder-grinding system with flue gas waste heat recovery Download PDFInfo
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- CN209371292U CN209371292U CN201822223955.XU CN201822223955U CN209371292U CN 209371292 U CN209371292 U CN 209371292U CN 201822223955 U CN201822223955 U CN 201822223955U CN 209371292 U CN209371292 U CN 209371292U
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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 utility model is a kind of explosion-proof anti-coking type fanned powder-grinding system with flue gas waste heat recovery, including run coal bin, scraper feeder, coal spout, blower mill, boiler high temperature mouth, pulverized coal distributor, burner, coal dust classifier, cold air adjusting valve, hot air pipe, ultralow temperature smoke regulating valve, two points of storehouse air preheaters, dust-extraction unit, pressure fan, cool air blower, air-introduced machine, desulfurizer, chimney, flue gas air heat exchanger and condensate return pipe.The utility model proposes high temperature boiler flue gas tube and black furnace smoke pipe is arranged in fan mill entrance and increases cold wind import before fan mill separator outlet to pulverized coal distributor, it can prevent coal dust detonation in fan mill, control fan disintegrating outlet oxygen amount, by improving oxygen amount, shorten the coal powder ignition time, furnace flame center and furnace outlet gas temperature are reduced, coking at high temperature boiler flue gas tube extraction opening is effectively reduced.Unit economy is improved with the condensed water recycled in flue gas by Mist heat recovering simultaneously.
Description
Technical field
The utility model relates to coal-fired power generator set field more particularly to a kind of explosion-proof anti-cakings with flue gas waste heat recovery
Burnt type fanned powder-grinding system.
Background technique
With the development of coal market coal price and power industry, more and more electricity power enterprises start to use poor quality
Coal, wherein more and more high water coals are used for generating set, and fan mill has stronger functions/drying, therefore is equipped with fan
The unit for grinding powder system burning high-moisture lignite is promoted.
It is equipped with the unit of fanned powder-grinding system, presently, there are easy coking at high temperature boiler flue gas tube extraction opening and fan mill are explosive
The problem of combustion.Coking can only be by manually disclosing coke at high temperature boiler flue gas tube extraction opening.Fan mill detonation, operations staff can only pass through control
Fan disintegrating outlet oxygen content processed is lower than 8%.Though hypoxemia amount can prevent detonation, oxygen amount is low to cause burner outlet coal dust
Ignition delay, furnace flame center move up, and furnace outlet gas temperature increases, to also increase the cigarette in high temperature boiler flue gas tube extraction opening source
Temperature exacerbates coking herein.
Burning high-moisture lignite and it is equipped with fanned powder-grinding system generating set at present, pulverized coal preparation system mainly there are three media
Dry pulverized coal preparation system and the dry pulverized coal preparation system of two media, but since coal dust is relatively thin and wind and smoke mixes in actual motion production process
Temperature degree is higher, both pulverized coal preparation systems all exist for preventing coal pulverizer detonation, and coal pulverizer outlet oxygen amount is too low, generally below
8%, it causes coal powder ignition in furnace and postpones the coking exacerbated at high temperature boiler flue gas tube extraction opening, and two media dry pulverized coal preparation system
Pulverizer outlet temperature can not be adjusted, the burning of Shi Lu inner tissue further deteriorates.
Summary of the invention
The utility model aims to solve the problem that the deficiencies in the prior art, and provides a kind of explosion-proof anti-caking with flue gas waste heat recovery
Burnt type fanned powder-grinding system.
In order to achieve the above object, the utility model adopts the following technical solutions:
A kind of explosion-proof anti-coking type fanned powder-grinding system with flue gas waste heat recovery, including run coal bin, scraper-type are given
Coal machine, coal spout, blower mill, high temperature boiler flue gas tube, boiler high temperature mouth, pulverized coal distributor, burner, coal dust classifier,
Cold air adjusting valve, hot air pipe, ultralow temperature smoke regulating valve, two points of storehouse air preheaters, dust-extraction unit, pressure fan, cool air blower,
Air-introduced machine, black furnace smoke pipe, desulfurizer, chimney, flue gas air heat exchanger and condensate return pipe, run coal bin and scraper-type are to coal
Machine by pipeline connect, scraper feeder by pipeline respectively with coal spout, boiler high temperature mouth, ultralow temperature smoke regulating valve
Connection, is full of high temperature boiler flue gas tube in pipeline between boiler high temperature mouth and coal spout, the outlet flue of burner by pipeline with
Two points of storehouse air preheater connections, two points of storehouse air preheaters are connect by pipeline with dust-extraction unit, and dust-extraction unit passes through pipeline
Connect with the input terminal of air-introduced machine, the output end of air-introduced machine connect by pipeline with desulfurizer, desulfurizer pass through pipeline and
The pipeline that the output end of chimney connection, desulfurizer is connect by pipeline with cool air blower and the two is connected is interior full of black furnace cigarette
Pipe, flue gas air heat exchanger is by pipeline respectively at cool air blower, pressure fan, two points of storehouse air preheaters and ultralow temperature flue gas tune
Valve connection is saved, flue gas air heat exchanger also passes through pipeline and connect with desulfurizer, and the combustion chamber of burner passes through hot air pipe and two
Divide the connection of storehouse air preheater, coal spout is fixedly connected with the input terminal of blower mill, and blower mill passes through pipeline and coal
Powder separator connection, coal dust classifier by pipeline connect with pulverized coal distributor and the two be connected pipeline on pass through pipeline with it is cold
The connection of wind regulating valve, cold air adjusting valve are connected by pipeline and the output end of pressure fan, and pulverized coal distributor passes through pipeline and burning
Device connection, desulfurizer are connected with flue gas air heat exchanger by condensate return pipe.
Particularly, the boiler high temperature mouth is located on the boiler tubing of burner.
Particularly, the dust-extraction unit is electric precipitator.
The beneficial effects of the utility model are: the utility model proposes high temperature boiler flue gas tube and cold is arranged in fan mill entrance
Stove pipe and increase cold wind import before fan mill separator outlet to pulverized coal distributor, coal dust in fan mill can be prevented quick-fried
Combustion controls fan disintegrating outlet oxygen amount, by improving oxygen amount, shortens the coal powder ignition time, reduces furnace flame center and burner hearth goes out
Mouth smoke temperature, is effectively reduced coking at high temperature boiler flue gas tube extraction opening.Pass through Mist heat recovering simultaneously and recycles in flue gas
Condensed water improves unit economy.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model；
In figure: 1- run coal bin；2- scraper feeder；3- coal spout；4- blower mill；5- high temperature boiler flue gas tube；6- pots
Furnace high temperature mouth；7- pulverized coal distributor；8- burner；9- coal dust classifier；10- cold air adjusting valve；11- hot air pipe；12- is ultralow
Warm smoke regulating valve；13- bis- divides storehouse air preheater；14- dust-extraction unit；15- pressure fan；16- cool air blower；17- air-introduced machine；
18- black furnace smoke pipe；19- desulfurizer；20- chimney；21- flue gas air heat exchanger；22- condensate return pipe；
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawings and examples:
As shown in Figure 1, a kind of explosion-proof anti-coking type fanned powder-grinding system with flue gas waste heat recovery, including run coal bin
1, scraper feeder 2, coal spout 3, blower mill 4, high temperature boiler flue gas tube 5, boiler high temperature mouth 6, pulverized coal distributor 7, combustion
12, two points of burner 8, coal dust classifier 9, cold air adjusting valve 10, hot air pipe 11, ultralow temperature smoke regulating valve storehouse air preheaters
13, dust-extraction unit 14, pressure fan 15, cool air blower 16, air-introduced machine 17, black furnace smoke pipe 18, desulfurizer 19, chimney 20, flue gas
Air heat exchanger 21 and condensate return pipe 22, run coal bin 1 are connected with scraper feeder 2 by pipeline, scraper feeder 2
Connect respectively with coal spout 3, boiler high temperature mouth 6, ultralow temperature smoke regulating valve 12 by pipeline, boiler high temperature mouth 6 with fall
High temperature boiler flue gas tube 5 is full of in pipeline between coal pipe 3, the outlet flue of burner 8 passes through pipeline and two points of storehouse air preheaters 13
Connection, two points of storehouse air preheaters 13 are connect by pipeline with dust-extraction unit 14, and dust-extraction unit 14 passes through pipeline and air-introduced machine 17
Input terminal connection, the output end of air-introduced machine 17 connect by pipeline with desulfurizer 19, and desulfurizer 19 passes through pipeline and cigarette
Chimney 20 connects, and the pipeline that the output end of desulfurizer 19 is connect by pipeline with cool air blower 16 and the two is connected is interior full of black furnace
Smoke pipe 18, flue gas air heat exchanger 21 is by pipeline respectively at 15, two points of cool air blower 16, pressure fan 13 and of storehouse air preheater
Ultralow temperature smoke regulating valve 12 connects, and flue gas air heat exchanger 21 is also connect by pipeline with desulfurizer 19, the combustion of burner 8
It burns room to connect by hot air pipe 11 with two points of storehouse air preheaters 13, the input terminal of coal spout 3 and blower mill 4 is fixed to be connected
It connects, blower mill 4 is connect by pipeline with coal dust classifier 9, and coal dust classifier 9 is connect by pipeline with pulverized coal distributor 7
And connect by pipeline with cold air adjusting valve 10 on the connected pipeline of the two, cold air adjusting valve 10 passes through pipeline and pressure fan 15
Output end connection, pulverized coal distributor 7 are connect by pipeline with burner 8, and desulfurizer 19 and flue gas air heat exchanger 21 pass through
Condensate return pipe 22 connects.
Particularly, the boiler high temperature mouth 6 is located on the boiler tubing of burner 8.
Particularly, the dust-extraction unit 14 is electric precipitator.
Raw coal in run coal bin 1 enters blower mill 4 by coal spout 3 by scraper feeder 2, at the same with from pot
The black furnace cigarette that high-temperature flue gas and desulfurizer 19 outlet that furnace boiler high temperature mouth 6 extracts are drawn is through cool air blower 16 and pressure fan
The flue gas air heat exchanger 21 of 15 outlets, which is cooled into after ultralow temperature flue gas enters coal spout 3, enters blower mill 4, by super
Low-temperature flue gas regulating valve 12 adjusts 4 air outlet velocity of blower mill, therefore the gas due to entering blower mill 4 is all flue gas
The detonation that can be effectively prevent in fan mill, wind powder mixture enters coal dust classifier 9 and is divided after blower mill 4 is broken
From, it is unsatisfactory for desired pulverized coal particle return blower mill 4 and continues to be crushed, the coal dust met the requirements and the outlet of pressure fan 15
Air mixes all the way, and distribution then through pulverized coal distributor 7 to each burner 8 and being sent into Boiler Furnace is burnt, pulverized coal distributor 7
The oxygen content of outlet is controlled by cold air adjusting valve 10.Increased by cold air adjusting valve 10 and enters 8 coal dust intermixture of burner
Oxygen content can make coal dust catch fire in advance, and flame kernel moves down, and reduce the smoke temperature at boiler high temperature mouth 6, effectively inhibition high temperature furnace
The coking of boiler high temperature mouth 6 at 5 extraction of smoke pipe.
Enter flue gas air heat exchanger 21 after the pressurization that black furnace cigarette after desulfurizer 19 passes through cool air blower 16 to make
For heat source heat pressure fan 15 export air all the way, it is heated after air enter two warehouse separated type air preheaters 13, through again
Hot wind 11 after secondary heat exchange is sent to burner 8 as Secondary Air.Black furnace cigarette passes through the cooling of flue gas air heat exchanger 21, heat
Amount is finally sent to furnace by air absorption, and the Water vapor condensation in black furnace cigarette send to desulfurizer 19 for water and continues to use, and is recycled
Moisture while fume afterheat in recovered flue gas improves unit economy.
The utility model is exemplarily described above in conjunction with attached drawing, it is clear that the utility model specific implementation not by
The limitation of aforesaid way, if the method concept of the utility model and the various improvement of technical solution progress are used, or without
Improvement directly applies to other occasions, both is within the protection scope of the present invention.
Claims (3)
1. a kind of explosion-proof anti-coking type fanned powder-grinding system with flue gas waste heat recovery, which is characterized in that including run coal bin
(1), scraper feeder (2), coal spout (3), blower mill (4), high temperature boiler flue gas tube (5), boiler high temperature mouth (6), coal
Powder distributor (7), burner (8), coal dust classifier (9), cold air adjusting valve (10), hot air pipe (11), ultralow temperature flue gas are adjusted
Valve (12), two points of storehouse air preheaters (13), dust-extraction unit (14), pressure fan (15), cool air blower (16), air-introduced machine (17),
Black furnace smoke pipe (18), desulfurizer (19), chimney (20), flue gas air heat exchanger (21) and condensate return pipe (22), raw coal
Storehouse (1) is connected with scraper feeder (2) by pipeline, and coal spout (3) passes through pipeline and scraper feeder (2), ultralow temperature
Smoke regulating valve (12) connection, coal spout (3) are also connect by high temperature boiler flue gas tube (5) with boiler high temperature mouth (6), burner
(8) outlet flue connect by pipeline with two points of storehouse air preheaters (13), two points of storehouse air preheaters (13) pass through pipeline and
Dust-extraction unit (14) connection, dust-extraction unit (14) are connect by pipeline with the input terminal of air-introduced machine (17), air-introduced machine (17) it is defeated
Outlet is connect by pipeline with desulfurizer (19), and desulfurizer (19) is connect by pipeline with chimney (20), desulfurizer
(19) output end is connect by black furnace smoke pipe (18) with cool air blower (16), and flue gas air heat exchanger (21) is distinguished by pipeline
It is connect with cool air blower (16), pressure fan (15), two points of storehouse air preheaters (13) and ultralow temperature smoke regulating valve (12), flue gas
Air heat exchanger (21) also connect with desulfurizer (19) by pipeline, the combustion chamber of burner (8) pass through hot air pipe (11) and
Two points of storehouse air preheater (13) connections, coal spout (3) are fixedly connected with the input terminal of blower mill (4), blower mill
(4) it is connect by pipeline with coal dust classifier (9), coal dust classifier (9) is connect by pipeline with pulverized coal distributor (7) and the two
It is connect by pipeline with cold air adjusting valve (10) on connected pipeline, cold air adjusting valve (10) passes through pipeline and pressure fan (15)
Output end connection, pulverized coal distributor (7) are connect by pipeline with burner (8), desulfurizer (19) and flue gas air heat exchanger
(21) it is connected by condensate return pipe (22).
2. a kind of explosion-proof anti-coking type fanned powder-grinding system with flue gas waste heat recovery according to claim 1,
It is characterized in that, the boiler high temperature mouth (6) is located on the boiler tubing of burner (8).
3. a kind of explosion-proof anti-coking type fanned powder-grinding system with flue gas waste heat recovery according to claim 1,
It is characterized in that, the dust-extraction unit (14) is electric precipitator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822223955.XU CN209371292U (en) | 2018-12-28 | 2018-12-28 | A kind of explosion-proof anti-coking type fanned powder-grinding system with flue gas waste heat recovery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822223955.XU CN209371292U (en) | 2018-12-28 | 2018-12-28 | A kind of explosion-proof anti-coking type fanned powder-grinding system with flue gas waste heat recovery |
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| Publication Number | Publication Date |
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| CN209371292U true CN209371292U (en) | 2019-09-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201822223955.XU Active CN209371292U (en) | 2018-12-28 | 2018-12-28 | A kind of explosion-proof anti-coking type fanned powder-grinding system with flue gas waste heat recovery |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110822414A (en) * | 2019-11-11 | 2020-02-21 | 新疆大学 | Low NO of pi-shaped boiler under low loadXHigh temperature flue gas recirculation system and method |
| CN110822415A (en) * | 2019-11-11 | 2020-02-21 | 新疆大学 | Low NO of tower boiler under low loadXHigh temperature flue gas recirculation system and method |
| CN111256107A (en) * | 2020-03-31 | 2020-06-09 | 国电南京电力试验研究有限公司 | Explosion-proof system for grinding high-volatile coal by double-inlet and double-outlet coal mill and working method |
| CN113154430A (en) * | 2021-04-09 | 2021-07-23 | 西安热工研究院有限公司 | Supercritical unit fan mill control system and method |
-
2018
- 2018-12-28 CN CN201822223955.XU patent/CN209371292U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110822414A (en) * | 2019-11-11 | 2020-02-21 | 新疆大学 | Low NO of pi-shaped boiler under low loadXHigh temperature flue gas recirculation system and method |
| CN110822415A (en) * | 2019-11-11 | 2020-02-21 | 新疆大学 | Low NO of tower boiler under low loadXHigh temperature flue gas recirculation system and method |
| CN111256107A (en) * | 2020-03-31 | 2020-06-09 | 国电南京电力试验研究有限公司 | Explosion-proof system for grinding high-volatile coal by double-inlet and double-outlet coal mill and working method |
| CN113154430A (en) * | 2021-04-09 | 2021-07-23 | 西安热工研究院有限公司 | Supercritical unit fan mill control system and method |
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