CN104121595B - Rapid cooling type smoke mixing chamber device - Google Patents

Rapid cooling type smoke mixing chamber device Download PDF

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Publication number
CN104121595B
CN104121595B CN201410323386.XA CN201410323386A CN104121595B CN 104121595 B CN104121595 B CN 104121595B CN 201410323386 A CN201410323386 A CN 201410323386A CN 104121595 B CN104121595 B CN 104121595B
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smoke
mixing chamber
chamber
mixing
cooling water
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CN104121595A (en
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施大钟
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SHANGHAI YUANMENG ELECTRICITY ENERGY TECHNOLOGY CONSULTING CENTER
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SHANGHAI YUANMENG ELECTRICITY ENERGY TECHNOLOGY CONSULTING CENTER
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Abstract

The invention discloses a rapid cooling type smoke mixing chamber device. The rapid cooling type smoke mixing chamber device comprises a mixing chamber body; one end of the mixing chamber body is a smoke inlet and is communicated with a boiler smoke pumping port; the other end of the mixing chamber body is a smoke outlet and is communicated with a high-temperature boiler smoke pipe; the mixing chamber body is provided with a cooling water mechanism so that indoor smoke and cooling water can form countercurrent to form a membrane type inner-cooling structure; a cold fog device used for evenly spraying atomized cooling water into a room is also arranged on the smoke inlet side of the mixing chamber body. The atomized cooling water is sprayed to the smoke inlet side of the mixing chamber body to cool high-temperature smoke rapidly, so that the temperature of the smoke is reduced, and the smoke pumping port or the mixing chamber body is prevented from coking. In addition, cold smoke evenly enters the mixing chamber body from the smoke inlet side of the mixing chamber body in the circumferential direction of the mixing chamber body, and the cold smoke forms a low-temperature smoke membrane on the inner wall, below the smoke inlet side, of the mixing chamber body by being affected by the longitudinal flowing direction of main current in the mixing chamber body, so that the smoke pumping port or the mixing chamber body is further prevented from coking.

Description

A kind of quenching flue gas mixing-chamber device
Technical field
The invention belongs to stove pipe road technical field is and in particular to a kind of quenching flue gas mixing-chamber device.
Background technology
Brown coal have that moisture is high, volatile matter is high, caloric value is low, ash fusion point is low, abrasiveness is low and the features such as easy spontaneous combustion, therefore not Easily store, also unsuitable long distance transportation.Account for the 40% of coal gross reserves in worldwide brown coal, China's brown coal account for coal The 13% of gross reserves, about 4/5 is distributed in the east three alliance area that east Inner Mongolia is connected with three provinces in the northeast of China, and remaining 1/5 is mainly distributed In Yunnan Province.The brown coal of the Inner Mongol and the Northeast belong to old brown coal, total moisture 25%-40%;Yunnan lignite belongs to young brown coal, Total moisture 40%~60%, containing wood fibre.
At present, brown coal using main path be still by electric power stations near coal-mines combustion power generation, the existing multiple stage 600mw level of China is brown Coal unit puts into operation.Because brown coal moisture is high, generally individually adopt three media (high-temperature flue gas+hot blast+cold smoke) or second medium (high temperature furnace Cigarette+hot blast) the direct feed pulverized coal-fan mill pulverized coal preparation system that is dried, wherein high-temperature flue gas generally extract from furnace outlet position, hot blast From air preheater air side outlet, cold smoke takes from boiler induced-draft fan exhaust pass, cold and hot different each road by cold smoke blower fan Medium is delivered to coal pulverizer by high-temperature furnace smoke pipeline after mixing in the flue gas mixing-chamber being connected with high-temperature flue gas smoking mouth.So And, due to the low easy coking of brown coal ash fusion point, in the large-scale lignite-fired unit having put into operation at present, generally existing high-temperature flue gas smoking mouth And the problem that mixing chamber coking is serious, have a strong impact on safety, the economical operation of combustion brown coal generating set.
At present, there is not effective solution for boiler using brown coal smoking mouth and mixing chamber coking problem in the industry, extensively adopt The measure taking be arrange near smoking mouth enough beat burnt hole, ensure smoking mouth and mixing chamber by way of manually beating Jiao Unobstructed.This artificial Jiao's mode of beating needs to consume substantial amounts of manpower and materials, and bulk cinder drops to boiler heating surface and mill The safe operation of coal machine causes threat.Also having a kind of is still to be increased to smoking mouth position in the scheme of theoretical research stage After primary superheater, thus reducing smoking mouth cigarette temperature to slow down smoking mouth and mixing chamber coking, but this scheme may be only available for Tower boiler, is of limited application.
Boiler coke mechanism is sufficiently complex physical and chemical process, and the grey particle of melting and semi-molten state strikes water Coking will be formed in cold wall or other radiation heating-surface.Under conditions of specific coal of burning, the principal element of impact coking For flue-gas temperature and its flox condition, when cigarette Wen Yuegao and flue gas excessively wash away heating surface, coking is even more serious.Active service brown coal pot Stove smoking mouth coking is the too high result excessively washing away heating surface comprehensive function with flue gas of cigarette temperature at smoking mouth.
Content of the invention
The technical problem to be solved is to provide a kind of quenching flue gas mixing-chamber device, can effectively solve the problem that brown Coal burning boiler smoking mouth coking problem.
In order to solve above-mentioned technical problem, the present invention adopts the following technical scheme that:
A kind of quenching flue gas mixing-chamber device, is connected between boiler smoking mouth and high-temperature furnace smoke pipeline, including mixed Close room body, one end of mixing chamber body is smoke inlet, and is connected with boiler smoking mouth, and the other end of mixing chamber body is Exhanst gas outlet, and be connected with high-temperature furnace smoke pipeline, on mixing chamber body, setting cooling water mechanism makes indoor flue gas and cooling water Form counter-flow arrangement, to constitute membrane type inner-cooling structure, and be additionally provided with to interior uniformly in the smoke inlet side of mixing chamber body Spray into the harl device of atomization cooling water.
It is additionally provided with the cold smoke device uniformly spraying into cold smoke to interior in the smoke inlet side of mixing chamber body.
All by expansion joint machine between described smoke inlet and boiler smoking mouth, between exhanst gas outlet and high-temperature furnace smoke pipeline Structure is attached.
Between described smoke inlet and boiler smoking mouth, the expansion joint mechanism of setting is ring plate formula expansion joint.
Between described exhanst gas outlet and high-temperature furnace smoke pipeline, the expansion joint mechanism of setting is casing expansion connector.
Described harl device include annular header tank on mixing chamber body, be uniformly distributed along mixing chamber circumference and point It is not installed on the cooling water atomizing nozzle on fin between the water screen tube of cooling water mechanism.
Described cold smoke device include annular cold smoke smoke-box on mixing chamber body, be uniformly distributed along mixing chamber circumference and Between by the water screen tube of cooling water mechanism, fin disconnects constituted gas approach.
Using technique scheme, this quenching flue gas mixing-chamber device has several advantages that
1st, by the cooling water that the smoke inlet side spray in mixing chamber body enters atomization, high-temperature flue gas are rapidly cooled down, Thus reducing flue-gas temperature to prevent smoking mouth/mixing chamber coking;
2nd, the cold smoke device along the uniform air inlet of mixing chamber circumference is provided with by the smoke inlet side in mixing chamber, in mixing Chamber interior walls form low-temperature flue gas air film, thus preventing smoking mouth/mixing chamber coking further;
3rd, the boiler body of the large-scale power station such as boiler using brown coal is suspension arrangement, and that is, during boiler startup, boiler body can be vertical Expand downwards.For absorbing the vertical direction displacement of mixing chamber and smoking mouth connecting place, arrange ring plate formula expansion joint herein, according to By the CONTACT WITH FRICTION between its plate a and plate b realize flue sealing, and rely on plate a and plate b between slidably to absorb smoking The two of mouth plane are to displacement.
4th, arrange casing expansion connector in mixing chamber and high-temperature furnace smoke pipeline connecting place, to absorb mixing chamber body in water Square to thermal walking.
Brief description
The present invention is described in detail with reference to the accompanying drawings and detailed description:
Fig. 1 is the scheme of installation of the quenching flue gas mixing-chamber device of the present invention.
Fig. 2 is the structural representation of the quenching flue gas mixing-chamber device of the present invention.
Fig. 3 is the sectional view of the a-a line along along Fig. 1.
Fig. 4 is the sectional view of the b-b line along along Fig. 1.
Fig. 5 is the sectional view of the c-c line along along Fig. 1.
Fig. 6 is the structural representation of the single gas approach of the present invention.
Fig. 7 is the structural representation of the single cooling water atomizing nozzle of the present invention.
Fig. 8 is the d direction view of the present invention;
Fig. 9 is the e direction view of the present invention.
Specific embodiment
As shown in figs 1-9, it is connected at boiler smoking mouth 1 and high temperature furnace to the quenching flue gas mixing-chamber device of the present invention Between smoke pipeline 2, including a mixing chamber body 3, the right-hand member of mixing chamber body 3 is smoke inlet, and is connected with boiler smoking mouth 1 Logical, the left end of mixing chamber body 3 is exhanst gas outlet, and is connected with high-temperature furnace smoke pipeline 2, and, arranges on mixing chamber body 3 There is cooling water mechanism 4, make indoor flue gas form counter-flow arrangement, to constitute membrane type inner-cooling structure, this cooling water mechanism 4 with cooling water It is made up of cooling water inlet 41, water screen tube 42, coolant outlet 43, also there is between water screen tube 42 fin 44.In addition, mixed The smoke inlet side closing room body 3 is additionally provided with the harl device 5 uniformly spraying into atomization cooling water to interior.This harl device 5 wraps Include the annular header tank 51 on mixing chamber body 3, be uniformly distributed along mixing chamber circumference and be respectively arranged in cooling water mechanism 4 42 fins 44 of water screen tube on cooling water atomizing nozzle 52, the cold of atomization is entered by the smoke inlet side spray in mixing chamber High-temperature flue gas are rapidly cooled down by but water, thus flue-gas temperature can be reduced, to prevent the coking of smoking mouth/mixing chamber.Pass through It is additionally provided with the cold smoke device 6 uniformly spraying into cold smoke to interior in the smoke inlet side of mixing chamber body 3, this cold smoke device 6 includes Annular cold smoke smoke-box 61 on mixing chamber body 3, it is uniformly distributed along mixing chamber circumference and the water-cooling wall by cooling water mechanism 4 42 fins of pipe disconnect constituted gas approach 62.By the smoke inlet side of mixing chamber along mixing chamber circumference even into Cold smoke, longitudinally being flowed to by the indoor main flow of mixing is affected, and the mixing chamber interior walls in gas approach downstream for the cold smoke form low-temperature flue gas Air film, thus prevent the coking of smoking mouth/mixing chamber further.
All by expansion joint between described smoke inlet and boiler smoking mouth 1, between exhanst gas outlet and high-temperature furnace smoke pipeline 2 Mechanism is attached.Wherein, between described smoke inlet and boiler smoking mouth 1, the expansion joint mechanism of setting is ring plate formula expansion joint 7.This is because the boiler body of the large-scale power stations such as boiler using brown coal is suspension arrangement, and that is, during boiler startup, boiler body can be vertical Expand downwards.For absorbing the vertical direction displacement of mixing chamber and smoking mouth connecting place, expanded by arranging ring plate formula herein Section 7, relies on the CONTACT WITH FRICTION between plate a and plate b to realize flue sealing, and relies on slidably inhaling between its plate a and plate b The two of receipts smoking mouth plane are to displacement.And the expansion joint mechanism of setting is then between described exhanst gas outlet and high-temperature furnace smoke pipeline 2 Casing expansion connector 8, thus absorbable mixing chamber body 3 thermal walking in the horizontal direction.Can absorb by above-mentioned setting Between boiler smoking mouth 1 and high-temperature furnace smoke pipeline 2, the expansion joint of three direction displacement combines so that this mixing chamber device can directly be applied Actual in engineering.
In sum, using the quenching flue gas mixing-chamber device of the present invention, combustion brown coal pulverized-coal fired boiler both can have been made to smoke Mouth 1 coking problem is addressed, and the three direction displacement simultaneously also solving between boiler smoking mouth 1 and high-temperature furnace smoke pipeline 2 absorbs, To ensureing brown coal generating set safety and economic operation, there is prominent realistic meaning.
But, one skilled in the art would recognize that above-mentioned specific embodiment is exemplary, it is in order to more Good makes skilled artisans appreciate that this patent is it is impossible to be not understood as the restriction to this patent protection domain, as long as According to disclosed in this patent, any equivalent change made of spirit or modification, each fall within the scope of this patent protection.

Claims (7)

1. a kind of quenching flue gas mixing-chamber device, is connected between boiler smoking mouth and high-temperature furnace smoke pipeline, its feature exists In: include mixing chamber body, one end of mixing chamber body is smoke inlet, and is connected with boiler smoking mouth, mixing chamber body The other end be exhanst gas outlet, and be connected with high-temperature furnace smoke pipeline, on mixing chamber body, setting cooling water mechanism makes indoor cigarette Gas forms counter-flow arrangement with cooling water, to constitute membrane type inner-cooling structure, and is additionally provided with the smoke inlet side of mixing chamber body Uniformly spray into the harl device of atomization cooling water to interior.
2. quenching flue gas mixing-chamber device according to claim 1 it is characterised in that:
It is additionally provided with the cold smoke device uniformly spraying into cold smoke to interior in the smoke inlet side of mixing chamber body.
3. quenching flue gas mixing-chamber device according to claim 1 it is characterised in that:
Between described smoke inlet and boiler smoking mouth, all entered by expansion joint mechanism between exhanst gas outlet and high-temperature furnace smoke pipeline Row connects.
4. quenching flue gas mixing-chamber device according to claim 3 it is characterised in that:
Between described smoke inlet and boiler smoking mouth, the expansion joint mechanism of setting is ring plate formula expansion joint.
5. quenching flue gas mixing-chamber device according to claim 1 it is characterised in that:
Between described exhanst gas outlet and high-temperature furnace smoke pipeline, the expansion joint mechanism of setting is casing expansion connector.
6. quenching flue gas mixing-chamber device according to claim 1 it is characterised in that:
Described harl device includes annular header tank on mixing chamber body, is uniformly distributed along mixing chamber circumference and pacifies respectively It is loaded on the cooling water atomizing nozzle on fin between the water screen tube of cooling water mechanism.
7. quenching flue gas mixing-chamber device according to claim 2 it is characterised in that: described cold smoke device include located at Annular cold smoke smoke-box on mixing chamber body, along mixing chamber circumference be uniformly distributed and by the water screen tube of cooling water mechanism between fin Disconnect constituted gas approach.
CN201410323386.XA 2014-07-08 2014-07-08 Rapid cooling type smoke mixing chamber device Active CN104121595B (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108036651B (en) * 2017-10-10 2019-06-07 东旭科技集团有限公司 Glass furnace fume export structure
CN109357277B (en) * 2018-11-21 2020-08-25 华融化学股份有限公司 Industrial waste smoke condenser

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000329330A (en) * 1999-05-19 2000-11-30 Tetsuto Tamura Rapid cooling apparatus using cooling liquid
CN201387018Y (en) * 2009-03-20 2010-01-20 中国电力工程顾问集团东北电力设计院 Water-cooled high temperature furnace flue gas pipe
CN202002132U (en) * 2011-01-14 2011-10-05 施大钟 Water cooling type high-temperature furnace smoke pipeline
CN202692097U (en) * 2012-08-05 2013-01-23 哈尔滨锅炉厂有限责任公司 Smoke extraction device with anti-coking function
CN202770150U (en) * 2012-08-24 2013-03-06 东方电气集团东方锅炉股份有限公司 Brown coal boiler smoke exhaust mixing chamber
CN203116490U (en) * 2013-03-18 2013-08-07 施大钟 Brown coal drying and combusting system with gas exhaust heat energy and water recovery function
CN203323153U (en) * 2013-05-29 2013-12-04 山东华源锅炉有限公司 Membrane type inner-cooling high-temperature furnace smoke pipe system
CN203940453U (en) * 2014-07-08 2014-11-12 上海援梦电力能源科技咨询中心 Quenching flue gas mixing-chamber device

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000329330A (en) * 1999-05-19 2000-11-30 Tetsuto Tamura Rapid cooling apparatus using cooling liquid
CN201387018Y (en) * 2009-03-20 2010-01-20 中国电力工程顾问集团东北电力设计院 Water-cooled high temperature furnace flue gas pipe
CN202002132U (en) * 2011-01-14 2011-10-05 施大钟 Water cooling type high-temperature furnace smoke pipeline
CN202692097U (en) * 2012-08-05 2013-01-23 哈尔滨锅炉厂有限责任公司 Smoke extraction device with anti-coking function
CN202770150U (en) * 2012-08-24 2013-03-06 东方电气集团东方锅炉股份有限公司 Brown coal boiler smoke exhaust mixing chamber
CN203116490U (en) * 2013-03-18 2013-08-07 施大钟 Brown coal drying and combusting system with gas exhaust heat energy and water recovery function
CN203323153U (en) * 2013-05-29 2013-12-04 山东华源锅炉有限公司 Membrane type inner-cooling high-temperature furnace smoke pipe system
CN203940453U (en) * 2014-07-08 2014-11-12 上海援梦电力能源科技咨询中心 Quenching flue gas mixing-chamber device

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