CN103206715A - Tail heated surface arrangement structure of pulverized coal fired boiler - Google Patents

Tail heated surface arrangement structure of pulverized coal fired boiler Download PDF

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Publication number
CN103206715A
CN103206715A CN2013101310566A CN201310131056A CN103206715A CN 103206715 A CN103206715 A CN 103206715A CN 2013101310566 A CN2013101310566 A CN 2013101310566A CN 201310131056 A CN201310131056 A CN 201310131056A CN 103206715 A CN103206715 A CN 103206715A
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CN
China
Prior art keywords
tail
flue
economizer
shaped
air preheater
Prior art date
Application number
CN2013101310566A
Other languages
Chinese (zh)
Inventor
何雁飞
韦志平
孟慧
耿长萍
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无锡华光锅炉股份有限公司
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Application filed by 无锡华光锅炉股份有限公司 filed Critical 无锡华光锅炉股份有限公司
Priority to CN2013101310566A priority Critical patent/CN103206715A/en
Publication of CN103206715A publication Critical patent/CN103206715A/en

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Abstract

The invention provides a tail heated surface arrangement structure of a pulverized coal fired boiler. The tail heated surface arraignment structure ensures the height of reserved smoke denitrification flues without increasing the height of a tail flue, saves flue space, and also prevents low-temperature corrosion of a preheater. The tail heated surface arraignment structure comprises the tail flue and is characterized in that the tail flue is provided with an upper H-shaped economizer, reserved denitrification flues, upper air preheaters, lower H-shaped economizers, lower air preheater tops, and low-temperature section horizontal air preheaters from top to bottom. The upper H-shaped economizer and the lower H-shaped economizers are all H-shaped finned tube economizers. Lowermost tube boxes of the low-temperature section horizontal air preheaters are enameled tube boxes horizontally arranged in sequence.

Description

A kind of back-end surfaces arrangement of pulverized-coal fired boiler

Technical field

The present invention relates to the technical field of pulverized-coal fired boiler structure, be specially a kind of back-end surfaces arrangement of pulverized-coal fired boiler.

Background technology

Along with China's constant development of economy, energy-consuming is more and more, and the environmental pollution that thereupon brings is also more and more serious.Coal is occupied an leading position in China's energy-consuming, and coal fire discharged sulfur dioxide, nitrogen oxide are the main sources that causes the environmental pollution of atmosphere pollution, acid rain.Present stage, the flue gas desulfurization project is implemented on a large scale, but denitrating flue gas is at the early-stage.At present, in the comparatively ripe mainstream technology, arrange that equipment for denitrifying flue gas is to reduce NOX discharging means more effectively in the world.

The back-end ductwork of conventional pulverized-coal boiler is when satisfying heat exchange and requiring, and will reserve to arranging that equipment for denitrifying flue gas is reserved higher flue space again is the comparison difficulty, generally all can only take the measure that flue integral body is raised.Existing structure is seen Fig. 1, it comprises back-end ductwork 1, be furnished with higher level's light pipe economizer 2, higher level's air preheater 3, subordinate's light pipe economizer 4, subordinate air preheater top 5, low-temperature zone vertical air preheater 6 in the back-end ductwork 1 from top to bottom, simultaneously, the ammonium hydrogen sulfate that forms after the boiler tail flue gas denitration corrodes pipe after the zone of low-temperature zone vertical air preheater 6 forms weak acid easily and is stained with the knot ash, thereby forms cold end corrosion.

Summary of the invention

At the problems referred to above, the invention provides a kind of back-end surfaces arrangement of pulverized-coal fired boiler, it guarantees the height of denitrating flue gas reservation flue, the while does not increase the height of back-end ductwork, has saved the flue space, can prevent the cold end corrosion to preheater simultaneously.

A kind of back-end surfaces arrangement of pulverized-coal fired boiler, its technical scheme is such: it comprises back-end ductwork, it is characterized in that: described back-end ductwork is furnished with higher level H type economizer, denitration from top to bottom with reserving flue, higher level's air preheater, the H of subordinate type economizer, subordinate air preheater top, low-temperature zone horizontal air preheater, described higher level H type economizer, the H of subordinate type economizer are H type ribbed pipe type economizer, and the orlop bobbin carriage of described low-temperature zone horizontal air preheater is that horizontal suitable row are arranged and the orlop bobbin carriage is the bobbin carriage of enamel pipe.

After adopting structure of the present invention, the heat exchange efficiency of H type ribbed pipe type economizer is much higher than light pipe formula economizer, can reduce the economizer hand about 50%, vertical pipe row number of economizer is greatly reduced, can reach the effect in good saving flue space, and because the orlop bobbin carriage of subordinate's air preheater is horizontal along the row layout, material adopts enamel pipe, it can prevent the burn into of preheater cold end corrosion and ammonium salt and prevent from stopping up, guaranteed the height of denitrating flue gas reservation flue, do not increase simultaneously the height of back-end ductwork, saved the flue space.

Description of drawings

Fig. 1 is the back-end surfaces arrangement schematic diagram of existing pulverized-coal fired boiler;

Fig. 2 is front view structural representation of the present invention.

The specific embodiment

See Fig. 2, it comprises back-end ductwork 1, back-end ductwork 1 is furnished with higher level H type economizer 2, denitration from top to bottom with reserving flue 3, higher level's air preheater 4, the H of subordinate type economizer 5, subordinate air preheater top 6, low-temperature zone horizontal air preheater 7, higher level H type economizer 2, the H of subordinate type economizer 5 are H type ribbed pipe type economizer, and the orlop bobbin carriage of low-temperature zone horizontal air preheater 7 is that horizontal suitable row are arranged and the orlop bobbin carriage is the bobbin carriage of enamel pipe.

Claims (1)

1. the back-end surfaces arrangement of a pulverized-coal fired boiler, it comprises back-end ductwork, it is characterized in that: described back-end ductwork is furnished with higher level H type economizer, denitration from top to bottom with reserving flue, higher level's air preheater, the H of subordinate type economizer, subordinate air preheater top, low-temperature zone horizontal air preheater, described higher level H type economizer, the H of subordinate type economizer are H type ribbed pipe type economizer, and the orlop bobbin carriage of described low-temperature zone horizontal air preheater is that horizontal suitable row are arranged and the orlop bobbin carriage is the bobbin carriage of enamel pipe.
CN2013101310566A 2013-04-16 2013-04-16 Tail heated surface arrangement structure of pulverized coal fired boiler CN103206715A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2013101310566A CN103206715A (en) 2013-04-16 2013-04-16 Tail heated surface arrangement structure of pulverized coal fired boiler

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2013101310566A CN103206715A (en) 2013-04-16 2013-04-16 Tail heated surface arrangement structure of pulverized coal fired boiler

Publications (1)

Publication Number Publication Date
CN103206715A true CN103206715A (en) 2013-07-17

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Family Applications (1)

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Country Status (1)

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CN (1) CN103206715A (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201034430Y (en) * 2007-07-20 2008-03-12 哈尔滨鑫北源电站设备制造有限公司 Power boiler H-shaped coal economizer
US20110303133A1 (en) * 2009-04-21 2011-12-15 Industrial Accessories Company Pollution abatement process for fossil fuel-fired boilers
CN102537980A (en) * 2012-01-16 2012-07-04 哈尔滨工业大学 High-temperature melting treatment system and method for sludge
CN102635869A (en) * 2012-05-08 2012-08-15 上海锅炉厂有限公司 Boiler with denitration device and boiler modification method
CN203223929U (en) * 2013-04-16 2013-10-02 无锡华光锅炉股份有限公司 Tail heating surface arrangement structure of pulverized coal boiler

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201034430Y (en) * 2007-07-20 2008-03-12 哈尔滨鑫北源电站设备制造有限公司 Power boiler H-shaped coal economizer
US20110303133A1 (en) * 2009-04-21 2011-12-15 Industrial Accessories Company Pollution abatement process for fossil fuel-fired boilers
CN102537980A (en) * 2012-01-16 2012-07-04 哈尔滨工业大学 High-temperature melting treatment system and method for sludge
CN102635869A (en) * 2012-05-08 2012-08-15 上海锅炉厂有限公司 Boiler with denitration device and boiler modification method
CN203223929U (en) * 2013-04-16 2013-10-02 无锡华光锅炉股份有限公司 Tail heating surface arrangement structure of pulverized coal boiler

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Application publication date: 20130717

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