CN103256610A - W-shaped flame boiler with function of preventing cold ash hopper and slag well from being corroded - Google Patents
W-shaped flame boiler with function of preventing cold ash hopper and slag well from being corroded Download PDFInfo
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- CN103256610A CN103256610A CN2013101568807A CN201310156880A CN103256610A CN 103256610 A CN103256610 A CN 103256610A CN 2013101568807 A CN2013101568807 A CN 2013101568807A CN 201310156880 A CN201310156880 A CN 201310156880A CN 103256610 A CN103256610 A CN 103256610A
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Abstract
The invention discloses a W-shaped flame boiler with a function of preventing a cold ash hopper and a slag well from being corroded and relates to the W-shaped flam boiler which can prevent the cold ash hopper and the slag well from being corroded. The W-shaped flame boiler with the function of preventing the cold ash hopper and the slag well from being corroded solves the problem that when an existing W-shaped flame boiler burns coal which has a high sulfur content, generated smoke is contacted with water of the slag well, slag well equipment is corroded, in addition, the smoke is contacted with steam evaporated from the slag well, acidic substances are generated, water wall pipes of the cold ash hopper which is arranged at the lower portion of a lower boiler body will be corroded by the acidity, the water wall pipes is corroded badly, even the phenomenon of pipe explosion will occur, and safety operation of the boiler is threatened. According to the W-shaped flame boiler with the function of preventing the cold ash hopper and the slag well from being corroded, the lower boiler body is communicated and fixedly connected with the lower end of an upper boiler body, the slag well is arranged at the lower end of the cold ash hopper, the W-shaped flame boiler further comprises two air-supplying pipelines, the two air-supplying pipelines are symmetrically communicated and fixedly connected on the outer wall of the cold ash hopper, and a plurality of boiler bottom sealed air nozzles are machined in the boiler width direction, on the position, corresponding to the outer wall of the cold ash hopper, of pipeline ports of the air-supplying pipelines. The W-shaped flame boiler with the function of preventing the cold ash hopper and the slag well from being corroded is used for preventing the cold ash hopper and the slag well from acidic corrosion.
Description
Technical field
The present invention relates to a kind of W flame boiler that can prevent furnace hopper and the corrosion of slag well.
Background technology
The W flame boiler is main force's type of furnace that present China uses coals inferior such as anthracite, meager coal, has domesticly put into operation and reaches 130 approximately at the W flame boiler of building, and the about 41000MW of total installation of generating capacity will occupy bigger proportion in the coal fired power generation of Future in China.The big slag that burning generates in the W flame burner hearth is fallen into the slag well via the lower furnace body bottom, again by the water cooling in the slag well.Big slag in the ordinary circumstance burner hearth after the burning is alkalescence, makes slag well water be alkalescent after falling into the slag well.But power stations, southwest such as China Sichuan, Yunnan and Guizhou are generally higher with sulfur content in the coal, cause SO in the flue gas that generates that burns
2Concentration is higher.Existing W flame boiler mainly comprises upper furnace body, lower furnace body and slag well, and furnace hopper is positioned at the middle and lower part of lower furnace body, and upper furnace body and lower furnace body are formed by the many intensive layouts of water screen tube.In W flame boiler running, find to contain SO
2High-temperature flue gas wash away lower furnace body and can cause following two problems: 1, wash away the flue-gas temperature higher (being generally about 1100 ℃) of lower furnace body in the W flame boiler, contain SO
2High-temperature flue gas with after slag well water contacts, not only can improve the temperature of slag well water and strengthen the evaporation of slag well water, and dissolve in the SO in the slag well water
2Also can transfer to being acid, the acid equipment (as tank, sealing steel plate, dragveyer chain etc.) that can corrode the slag well originally being weakly alkaline slag well water; 2, the steam that evaporates of slag well water and the SO in the flue gas
2Contact generates sulfurous acid, the acid water screen tube that can corrode furnace hopper.The water screen tube of circulation high temperature and high pressure steam the booster phenomenon can occur when seriously corroded, threaten the safe operation of boiler; Because the big slag that cools off in the slag well is pulled out by dragveyer, be the relevant device that acid slag well water can corrode dragveyer simultaneously, will cause faults such as dragveyer chain fracture during seriously corroded, also can have influence on the operation of boiler.
Summary of the invention
The present invention is for solving flue gas and the slag well water contact corrosion slag well equipment that the higher coal of existing W flame boiler combustion of sulfur amount produces, and flue gas contacts the generation acidic materials with the steam that slag well water evaporates, acid meeting is corroded the water screen tube of lower furnace body middle and lower part furnace hopper and is caused the water screen tube seriously corroded even the booster phenomenon occurs, threaten the problem of safe operation of the boiler, and then a kind of W type flame boiler that prevents furnace hopper and slag well corrosion function that has is provided.
The present invention solves the problems of the technologies described above the technical scheme of taking to be:
A kind of have the W type flame boiler that prevents furnace hopper and slag well corrosion function and comprise upper furnace body, lower furnace body and slag well, the middle and lower part of lower furnace body is furnace hopper, lower furnace body is communicated with the lower end that is fixed in upper furnace body, the slag well is arranged on the lower end of furnace hopper, described W flame boiler also comprises two air supply ducts, two air supply duct symmetrical connections are fixed on the outer wall of furnace hopper, and position corresponding with the pipeline opening of air supply duct on the outer wall of furnace hopper is processed with a plurality of furnace bottom sealing wind snouts along the stove cross direction.
The present invention compared with prior art has following beneficial effect: W flame boiler of the present invention is connected with air supply duct at the outer wall of furnace hopper, be processed with furnace bottom sealing wind snout on the outer wall of furnace hopper, the furnace bottom sealing wind that continues to spray into forms the bigger air curtain of one deck momentum, be full of the zone between aboveground of slag and the furnace hopper, stoped the high-temperature flue gas (SO that contains higher concentration
2) contact with slag well water and the acidic materials that generate to the corrosion of slag well; stoped the generation of acidic materials; make the pH value of slag well water rise to more than 7.1, protected the equipment (as tank, sealing steel plate, dragveyer chain etc.) in the slag well, avoided the SO in the high-temperature flue gas simultaneously
2Contact with the steam of slag well water evaporation, prevented that the acidic materials of generation to the corrosion of the water screen tube of furnace hopper, having protected the water screen tube of furnace hopper, thereby having ensured the safe operation of boiler, saved financial cost.
Description of drawings
Fig. 1 is that master of the present invention looks installation diagram, and Fig. 2 is the furnace hopper outer wall front view of A-A direction among Fig. 1.
The specific embodiment
The specific embodiment one: in conjunction with Fig. 1 and Fig. 2 explanation, present embodiment a kind of has the W type flame boiler that prevents furnace hopper and slag well corrosion function and comprises upper furnace body 1, lower furnace body 2 and slag well 3, the middle and lower part of lower furnace body 2 is furnace hopper 2-1, lower furnace body 2 is communicated with the lower end that is fixed in upper furnace body 1, slag well 3 is arranged on the lower end of furnace hopper 2-1, described W flame boiler also comprises two air supply ducts 4, two air supply duct 4 symmetrical connections are fixed on the outer wall of furnace hopper 2-1, and position corresponding with the pipeline opening of air supply duct 4 on the outer wall of furnace hopper 2-1 is processed with a plurality of furnace bottom sealing wind snouts 5 along the stove cross direction.
Furnace bottom sealing wind snout 5 is by the water screen tube formation of having loose bowels.
The specific embodiment two: in conjunction with Fig. 1 explanation, each air supply duct 4 and the angle α between the horizontal plane of present embodiment are 0 °～20 °.So design, the cold air that is blown into by air supply duct 4 can arrive the burner hearth center rapidly by furnace bottom sealing wind snout 5, and forms the bigger air curtain of one deck momentum between slag well 3 tops and furnace hopper 2-1, has stoped the high-temperature flue gas (SO that contains higher concentration
2) generate acidic materials such as sulfurous acid with contacting of slag well water, prevented that the equipment (as tank, sealing steel plate, dragveyer chain etc.) of slag well 3 is by sour corrosion.Other compositions are identical with the specific embodiment one with annexation.
The specific embodiment three: in conjunction with Fig. 2 explanation, the furnace bottom of present embodiment seals the rectangle that is shaped as of wind snout 5.So design, the air-supply better effects if of furnace bottom sealing wind snout 5.Other compositions are identical with the specific embodiment one or two with annexation.
The specific embodiment four: in conjunction with Fig. 2 explanation, the length a of each furnace bottom sealing wind snout 5 of present embodiment is 50～80mm.So design, the air-supply better effects if of furnace bottom sealing wind snout 5.Other compositions are identical with the specific embodiment three with annexation.
The specific embodiment five: in conjunction with Fig. 2 explanation, the width b of each furnace bottom sealing wind snout 5 of present embodiment is 10～20mm.So design, the air-supply better effects if of furnace bottom sealing wind snout 5.Other compositions are identical with the specific embodiment three with annexation.
The specific embodiment six: in conjunction with Fig. 1 explanation, the outer wall of the furnace hopper 2-1 of present embodiment and the angle β of horizontal direction are 55 °.Other compositions are identical with the specific embodiment five with annexation.
Operation principle: cold air (is about 10～30m/s) middle and lower parts of injecting lower furnace body 2 at a high speed by air supply duct 4, because furnace bottom sealing wind snout 5 is arranged intensive at the stove cross direction, furnace bottom sealing wind can arrive the burner hearth center rapidly, and under the effect of gravity, fall, the furnace bottom sealing wind that continues to spray into forms the bigger air curtain of one deck momentum, be full of the zone between slag well 3 tops and the furnace hopper 2-1, stoped the high-temperature flue gas (SO that contains higher concentration
2) with slag well water contact the SO in the flue gas
2Also just can't contact acidic materials such as generating sulfurous acid with slag well water, prevented that the equipment (as tank, sealing steel plate, dragveyer chain etc.) of slag well 3 is by sour corrosion, can't contact with slag well water owing to high-temperature flue gas simultaneously, slag well water can not generated water vapour by the high-temperature flue gas heating evaporation, does not therefore also just have water vapour to enter in the furnace hopper 2-1 and the high-temperature flue gas (SO that contains higher concentration
2) contact, can't generate acidic materials, prevented the corrosion to the water screen tube of the furnace hopper 2-1 of lower furnace body 2 middle and lower parts.
Claims (6)
1. one kind has the W type flame boiler that prevents furnace hopper and slag well corrosion function, it is characterized in that: described W flame boiler comprises upper furnace body (1), lower furnace body (2) and slag well (3), the middle and lower part of lower furnace body (2) is furnace hopper (2-1), lower furnace body (2) is communicated with the lower end that is fixed in upper furnace body (1), slag well (3) is arranged on the lower end of furnace hopper (2-1), described W flame boiler also comprises two air supply ducts (4), two air supply ducts (4) symmetrical connection is fixed on the outer wall of furnace hopper (2-1), and position corresponding with the pipeline opening of air supply duct (4) on the outer wall of furnace hopper (2-1) is processed with a plurality of furnace bottom sealing wind snouts (5) along the stove cross direction.
2. a kind of W type flame boiler that prevents furnace hopper and slag well corrosion function that has according to claim 1, it is characterized in that: the angle (α) between each air supply duct (4) and the horizontal plane is 0 °～20 °.
3. a kind of W type flame boiler that prevents furnace hopper and slag well corrosion function that has according to claim 1 and 2 is characterized in that: furnace bottom sealing wind snout (5) be shaped as rectangle.
4. a kind of W type flame boiler that prevents furnace hopper and slag well corrosion function that has according to claim 3 is characterized in that: the length (a) of each furnace bottom sealing wind snout (5) is 50～80mm.
5. a kind of W type flame boiler that prevents furnace hopper and slag well corrosion function that has according to claim 3 is characterized in that: the width (b) of each furnace bottom sealing wind snout (5) is 10～20mm.
6. a kind of W type flame boiler that prevents furnace hopper and slag well corrosion function that has according to claim 5, it is characterized in that: the angle (β) of the outer wall of furnace hopper (2-1) and horizontal direction is 55 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101568807A CN103256610A (en) | 2013-04-28 | 2013-04-28 | W-shaped flame boiler with function of preventing cold ash hopper and slag well from being corroded |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101568807A CN103256610A (en) | 2013-04-28 | 2013-04-28 | W-shaped flame boiler with function of preventing cold ash hopper and slag well from being corroded |
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| CN103256610A true CN103256610A (en) | 2013-08-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2013101568807A Pending CN103256610A (en) | 2013-04-28 | 2013-04-28 | W-shaped flame boiler with function of preventing cold ash hopper and slag well from being corroded |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114719270A (en) * | 2022-03-11 | 2022-07-08 | 哈尔滨博深科技发展有限公司 | Pulverized coal fired boiler capable of directly mixing and burning garbage and harmless treatment method of mixed and burned garbage |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3877440A (en) * | 1974-01-18 | 1975-04-15 | Foster Wheeler Corp | Curtain air system for vapor generators |
| GB2071832A (en) * | 1980-02-28 | 1981-09-23 | Babcock Power Ltd | Furnace and the operation thereof |
| CN1240021A (en) * | 1996-10-15 | 1999-12-29 | 西纳吉技术有限公司 | Corrosion protection for utility boiler side walls |
| CN1245878A (en) * | 1998-08-20 | 2000-03-01 | 株式会社日立制作所 | Boiler |
-
2013
- 2013-04-28 CN CN2013101568807A patent/CN103256610A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3877440A (en) * | 1974-01-18 | 1975-04-15 | Foster Wheeler Corp | Curtain air system for vapor generators |
| GB2071832A (en) * | 1980-02-28 | 1981-09-23 | Babcock Power Ltd | Furnace and the operation thereof |
| CN1240021A (en) * | 1996-10-15 | 1999-12-29 | 西纳吉技术有限公司 | Corrosion protection for utility boiler side walls |
| CN1245878A (en) * | 1998-08-20 | 2000-03-01 | 株式会社日立制作所 | Boiler |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114719270A (en) * | 2022-03-11 | 2022-07-08 | 哈尔滨博深科技发展有限公司 | Pulverized coal fired boiler capable of directly mixing and burning garbage and harmless treatment method of mixed and burned garbage |
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Application publication date: 20130821 |