CN102980199A - Special system for interface of medium temperature flue gas pipeline and heating surface in middle storage type bituminous coal boiler - Google Patents
Special system for interface of medium temperature flue gas pipeline and heating surface in middle storage type bituminous coal boiler Download PDFInfo
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- CN102980199A CN102980199A CN2012104559947A CN201210455994A CN102980199A CN 102980199 A CN102980199 A CN 102980199A CN 2012104559947 A CN2012104559947 A CN 2012104559947A CN 201210455994 A CN201210455994 A CN 201210455994A CN 102980199 A CN102980199 A CN 102980199A
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- temperature flue
- flue gas
- heating surface
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Abstract
The invention provides a special system for an interface of a medium temperature flue gas pipeline and a heating surface in a middle storage type bituminous coal boiler. The special system comprises a wall enclosure superheater connected with the pipeline and is characterized in that the center position of the wall enclosure superheater is provided with a rhombic opening. The special system solves key technology of medium temperature flue gas inerting and drying system construction, designs the shape of the interface of a vapour-water heating surface and the medium temperature flue gas pipeline, solves the difficult problems of thermal expansion, sealing and stress of the vapour-water heating surface and the medium temperature flue gas pipeline in different directions, and achieves design of the medium temperature flue gas pipeline.
Description
Technical field
The present invention relates to again opening and realize to extract the pipe design field of boiler smoke of power plant carbonated drink heating surface, is a kind of designing technique of high-temperature flue gas pipeline and carbonated drink heating surface interface.
Background technology
In recent years, along with the development of national economy, electricity needs rapid growth, electric coal demand surge; Coal price is unprecedented soaring year by year; The Northeast's coal resources are day by day exhausted; And this contradiction will continue in following considerable time; It is low that price is sought by genco, can guarantee again to use in a large number the coal of supply steady in a long-term; Eastern area of Inner Mongolia brown coal reserves are abundant, the coal source is sufficient, and haul distance is short, relative low price; Boiler uses former design Bituminous Coal pulverized coal preparation system and has hidden peril of explosion; The Northeast's station boiler is take bituminous coal as main, and the bituminous coal fired boiler ratio reaches 76%; Bituminous coal and brown coal two large coal characteristics differ greatly.Therefore, how the ball type pulverizer system bituminous coal fired boiler mixes burning brown coal becomes the technical barrier that needs to be resolved hurrily.
For storage formula bituminous coal fired boiler vast scale in solving mixes that the pulverized coal preparation system that occurs in the burning brown coal is explosion-proof, the discontented technical barrier such as exert oneself of drying capacity, serious coking and unit band, the inerting of middle temperature flue gas and dry technology have been developed, in order to implement and promote this technology, must solve the key technology in the construction, especially carbonated drink heating surface and middle temperature flue interface, it relates to the problems such as sealing, welding, expansion, support, and technical sophistication is determining that this technology success is used and popularization.
Summary of the invention
Goal of the invention: the invention provides the special-purpose system of warm flue and heating surface interface in a kind of middle storage formula bituminous coal fired boiler, its objective is problems such as solving existing sealing between carbonated drink heating surface and the middle temperature flue interface, welding, expansion, support.
Technical scheme: the present invention is achieved by the following technical solutions:
The special-purpose system of warm flue and heating surface interface comprises the enclosure wall superheater that is connected with pipeline in a kind of middle storage formula bituminous coal fired boiler, it is characterized in that: the opening (111) that has rhombus in the center of this enclosure wall superheater.
The position that is connected with enclosure wall superheater at pipeline is provided with reinforcement.
Advantage and effect: the invention provides the special-purpose system of warm flue and heating surface interface in a kind of middle storage formula bituminous coal fired boiler, comprise enclosure wall superheater, it is characterized in that: the opening that has rhombus at this enclosure wall superheater.
The invention solves the key technology in the construction of warm flue gas inerting and drying system, shape to carbonated drink heating surface and middle temperature flue interface designs, solve thermal expansion, sealing and the stressed difficult problem of carbonated drink heating surface and flue different directions, finished middle temperature flue design.
Description of drawings:
Fig. 1 is former enclosure wall superheater structure chart;
Fig. 2 is enclosure wall superheater perforate figure of the present invention;
Fig. 3 is part 1-spare 14 schematic diagrames among Fig. 2 of the present invention;
Fig. 4 be part 1 among Fig. 2 '-part 14 ' schematic diagram;
Fig. 5 be among Fig. 2 A to side view;
Fig. 6 is middle temperature flue and enclosure wall superheater sealed picture;
Fig. 7 be the end of Fig. 5 to upward view, namely A is to view;
Fig. 8 is the side view of Fig. 6, and namely B is to view.
The specific embodiment:The present invention is described further below in conjunction with accompanying drawing:
As shown in Figure 2, the invention provides the special-purpose system of warm flue and heating surface interface in a kind of middle storage formula bituminous coal fired boiler, comprise the enclosure wall superheater that is connected with pipeline, it is characterized in that: the opening 111 that has rhombus in the center of this enclosure wall superheater.
Be provided with reinforcement 333 in the position that pipeline is connected with enclosure wall superheater.Among Fig. 6 555 is the side enclosure wall tube.Among Fig. 8 11 is the moderate oven smoke pipe, and 22 is the plastic refractory layer, and 33 is horn mouth.
Because extracting the flue gas medium temperature higher is about 530 ℃, pipeline adopts outer INSULATION DESIGN, and material is 12Cr1MoV or 15CrMo.
With the enclosure wall superheater redesign, perforate on enclosure wall superheater by the middle temperature flue that connects, and is passed through the extraction that the coal pulverizer inlet negative pressure realizes centering temperature flue gas, sends into coal pulverizer and even whole pulverized coal preparation system, realizes inerting and drying to pulverized coal preparation system.Therefore, want to realize inerting and dry purpose, must consider enclosure wall superheater and the design of middle temperature flue and the interfacing problem of boiler enclosure wall superheater and middle temperature flue, wherein especially important with the latter, relate to thermal expansion, sealing and the stressed difficult problem of carbonated drink heating surface and flue different directions.
The enclosure wall superheater medium is 16.8MPa, 500 ℃ of steam, has certain temperature and pressure in hot lower downward expansion, and middle temperature flue-gas temperature is about about 530 ℃, pipeline bears the expansion of horizontal direction, expansion with two different directions, simultaneously, flue gas medium speed reaches 20m/s, will form certain horizontal thrust to pipeline, therefore, consider, the enclosure wall superheater opening is not adopted squared design but the design of employing rhombus, its characteristic structure is solid, and the antidetonation ability of quivering is strong, and simmers system easily.Concrete structure is seen Fig. 2, and former enclosure wall superheater structure is seen Fig. 1.
For gaining in strength and increasing pipeline and enclosure wall superheater bonding strength, increased by 4 reinforcements at pipeline, adopt plastic refractory in the sealing plate outside, increased sealing effectiveness, middle temperature flue sealing joint figure sees Fig. 6, Fig. 7, Fig. 8.
Claims (2)
1. the special-purpose system of warm flue and heating surface interface in the storage formula bituminous coal fired boiler in a kind comprises the enclosure wall superheater that is connected with pipeline, it is characterized in that: the opening (111) that has rhombus in the center of this enclosure wall superheater.
2. the special-purpose system of warm flue and heating surface interface in the middle storage formula bituminous coal fired boiler according to claim 1, it is characterized in that: the position that is connected with enclosure wall superheater at pipeline is provided with reinforcement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104559947A CN102980199A (en) | 2012-11-14 | 2012-11-14 | Special system for interface of medium temperature flue gas pipeline and heating surface in middle storage type bituminous coal boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104559947A CN102980199A (en) | 2012-11-14 | 2012-11-14 | Special system for interface of medium temperature flue gas pipeline and heating surface in middle storage type bituminous coal boiler |
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| Publication Number | Publication Date |
|---|---|
| CN102980199A true CN102980199A (en) | 2013-03-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012104559947A Pending CN102980199A (en) | 2012-11-14 | 2012-11-14 | Special system for interface of medium temperature flue gas pipeline and heating surface in middle storage type bituminous coal boiler |
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| CN (1) | CN102980199A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103900096A (en) * | 2013-12-23 | 2014-07-02 | 国家电网公司 | Connecting device for high-temperature flue gas pipeline and low-temperature flue gas pipeline of intermediate storage type bituminous coal boiler |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1784492B2 (en) * | 1968-08-13 | 1976-11-18 | Plewa-Werke Gmbh, 5522 Speicher | CONNECTION POINT FOR A SMOKE PIPE BY A FIREPLACE |
| DE29712851U1 (en) * | 1997-07-21 | 1997-10-09 | Jacob Plein-Wagner Söhne Steinzeugwarenfabrik GmbH & Co KG, 54662 Speicher | Chimney connection |
| CN201273778Y (en) * | 2008-08-02 | 2009-07-15 | 大连熵立得传热技术有限公司 | Low temperature flue gas heat collector |
| CN101672470A (en) * | 2009-08-28 | 2010-03-17 | 无锡海源重工股份有限公司 | Deslagging device of circulating fluidized bed boiler |
| CN102455139A (en) * | 2011-10-18 | 2012-05-16 | 张周卫 | Double-strand-flow low-temperature spiral winding pipe type heat exchanger with vacuum heat insulation function |
| CN102705835A (en) * | 2012-06-01 | 2012-10-03 | 无锡华光锅炉股份有限公司 | Large-caliber slag discharge pipe for circulating fluidized bed garbage boiler |
-
2012
- 2012-11-14 CN CN2012104559947A patent/CN102980199A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1784492B2 (en) * | 1968-08-13 | 1976-11-18 | Plewa-Werke Gmbh, 5522 Speicher | CONNECTION POINT FOR A SMOKE PIPE BY A FIREPLACE |
| DE29712851U1 (en) * | 1997-07-21 | 1997-10-09 | Jacob Plein-Wagner Söhne Steinzeugwarenfabrik GmbH & Co KG, 54662 Speicher | Chimney connection |
| CN201273778Y (en) * | 2008-08-02 | 2009-07-15 | 大连熵立得传热技术有限公司 | Low temperature flue gas heat collector |
| CN101672470A (en) * | 2009-08-28 | 2010-03-17 | 无锡海源重工股份有限公司 | Deslagging device of circulating fluidized bed boiler |
| CN102455139A (en) * | 2011-10-18 | 2012-05-16 | 张周卫 | Double-strand-flow low-temperature spiral winding pipe type heat exchanger with vacuum heat insulation function |
| CN102705835A (en) * | 2012-06-01 | 2012-10-03 | 无锡华光锅炉股份有限公司 | Large-caliber slag discharge pipe for circulating fluidized bed garbage boiler |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103900096A (en) * | 2013-12-23 | 2014-07-02 | 国家电网公司 | Connecting device for high-temperature flue gas pipeline and low-temperature flue gas pipeline of intermediate storage type bituminous coal boiler |
| CN103900096B (en) * | 2013-12-23 | 2016-06-15 | 国家电网公司 | Middle storage formula bituminous coal fired boiler high-temperature flue gas pipeline and low-temperature flue gas assembling pipe joint |
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Application publication date: 20130320 |