CN202484960U - Boiler-shell-type water-fire tube boiler - Google Patents

Boiler-shell-type water-fire tube boiler Download PDF

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Publication number
CN202484960U
CN202484960U CN201220023628XU CN201220023628U CN202484960U CN 202484960 U CN202484960 U CN 202484960U CN 201220023628X U CN201220023628X U CN 201220023628XU CN 201220023628 U CN201220023628 U CN 201220023628U CN 202484960 U CN202484960 U CN 202484960U
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CN
China
Prior art keywords
boiler
drum
arch
water
chiasma type
Prior art date
Application number
CN201220023628XU
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Chinese (zh)
Inventor
郭超
姜成斌
Original Assignee
湖北孝锅节能设备有限责任公司
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Priority to CN201220023628XU priority Critical patent/CN202484960U/en
Application granted granted Critical
Publication of CN202484960U publication Critical patent/CN202484960U/en

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Abstract

The utility model discloses a boiler-shell-type water-fire tube boiler used for solving the problem that the bottom of the existing boiler is superheated to be bulged or broken under direct radiation of high-temperature flame and smoke so as to seriously endanger the safety of the boiler. A single-return-stroke threaded smoke tube bundle is arranged in a boiler cylinder, water wall tubes are arranged on two sides of a hearth, a front arch and a back arch are arranged in the hearth, a left header and a right header are arranged on two sides of the lower part of the boiler cylinder, the upper ends of the water wall tubes are connected with the boiler cylinder, the lower ends of the water wall tubes are connected with the left head and the right header, descending tubes are arranged at two ends of the boiler cylinder, the two ends of the boiler cylinder are connected with the left header and the right header, a cross-type rack pipe is arranged at the middle part of the hearth, the upper end of the cross-type rack pipe is connected with the left lower part of the boiler cylinder, the lower end of the cross-type rack pipe is connected with the right header, the upper end of the cross-type rack pipe is also connected with the right lower part of the boiler cylinder, the lower end of the cross-type rack pipe is also connected with the left header and is provided with refractory bricks, the front arch is integrally connected with the cross-type rack pipe, and a burnout room entry is arranged between the back arch and the cross-type rack pipe so as to form a first burnout room and a second burnout room; and an ascending inclined angle of the cross-type rack pipe is 15-20 degrees, and the longitudinal pitch is 140-160mm.

Description

A kind of shell type water-fire tube boiler
Technical field
The utility model relates to the boiler series products, particularly relates to a kind of shell type water-fire tube boiler.
Background technology
The feeded water rapidly multitubular boiler is one of version of smaller hard flour pancake boiler.This type of boiler has been covered with water screen tube in burner hearth, arranged smoke pipe in the drum, because force ventilation, flue gas flow rate is higher in the smoke pipe, and it is stronger to conduct heat; Boiler is that water, fire tube combine, and has absorbed both advantages,, compact conformation simple with its production technology, easy for installation, save advantages such as metal consumptive material, technical-economic index be better and in Industrial Boiler, be used widely.
The 1970s and 1980s in last century; The fire tube boiler that generally uses is furnished with two backhaul smoke pipes in drum; About being divided on the back tube sheet or (up and down) two parts, the high-temperature flue gas that burner hearth comes out gets into the high-temperature region smoke pipe bundle of back tube sheet through burning chamber, from back to front to front smoke box; In front smoke box, turning back 180 ° gets into another backhaul (low-temperature space) smoke pipe bundle again, through after smoke box, economizer, deduster, air-introduced machine, chimney enter atmosphere.
This type of fire tube boiler design; Boiler drum bottom is directly exposed to and receives the high-temperature flue gas radiation in the burner hearth, and heat exchange is strong, and incrustation scale is formed easily at the drum bottom behind the boiler operatiopn certain hour; The cooling that heat transfer condition difference drum steel plate can not get water causes steel plate overheated, and possibly cause the generation of bulge phenomenon.On back tube sheet, form simultaneously the phenomenon of high-temperature region and low-temperature space, produce the excessive and shortcoming of easy crackle generation of thermal (temperature difference) stress.Afterwards because threaded flue augmentation of heat transfer technical application, the two backhaul smoke pipes in the drum are changed into single backhaul threaded flue bundle is only arranged, thoroughly solved the back tube sheet both sides uneven problem of being heated; In order outside drum, to form the flue gas circulation passage, just the waterwall tube of solid matter in the burner hearth is extracted out and inserted the shell bottom about half, become Eight characters comb and seal in the above with refractory material again, form the flue gas circulation passage.Solved the problem that the part shell receives thermal-flame and gas radiation; Still some is exposed among the thermal-flame but at the drum foot; Block so adopt the bottom to protect brick or pour into refractory material; But because of bottom constructing operation condition difficulty, difficult quality guarantee can come off because of being heated for a long time or in transportation, vibrating.
Production is for many years used and moved practice and shows that still there are some problems in this type boiler: 1, because of being furnished with two backhaul smoke pipes in the drum, on back tube sheet, form the cold high and low temperature phenomenon of heat on one side on one side, thermal (temperature difference) stress is excessive and be easy to generate the shortcoming of crackle; 2, anterior drum bottom directly receives thermal-flame and gas radiation, and heat exchange here is strong, if bad being easy to of boiler water quality caused overheated and the drum blister at shell lower junction incrustation scale, seriously jeopardizes boiler safety.
Summary of the invention
The purpose of the utility model is caused by thermal-flame and gas radiation overheatedly to rouse blister or break for solving existing boiler drum bottom; Avoid seriously jeopardizing the problem of boiler safety, on the basis that fully absorbs above-mentioned advantage, a kind of shell type water-fire tube boiler is provided.
The technical scheme of the utility model: a kind of shell type water-fire tube boiler, drum, fire grate, threaded flue, burner hearth, face arch, rear arch, about collect case, down-comer, water screen tube, chiasma type comb, drum and be positioned at upper furnace, drum is provided with water inlet pipe, steam outlet pipe; The single backhaul threaded flue tube bank of drum set inside, water screen tube is arranged in the burner hearth both sides, arranges whole pouring face arch in the burner hearth and builds rear arch by laying bricks or stones; Left and right collection case is arranged on both sides under the drum, and the water screen tube upper end is connected with drum, and the lower end is connected with left and right collection case; The two ends of drum are provided with down-comer, and are connected with left and right collection case, it is characterized in that: the chiasma type comb has been arranged at the burner hearth middle part; The chiasma type comb is built and is gone up refractory brick, and chiasma type comb upper end is connected with the drum lower left quarter, and the lower end is connected with right collection case; Chiasma type comb upper end is connected with the drum right lower quadrant; And the lower end is connected with left side collection case, when face arch is built and the chiasma type comb be connected as a single entity, be that secondary furnace enters the mouth between rear arch and the chiasma type comb; Constitute first secondary furnace, second secondary furnace, form first and second backhaul of boiler; Chiasma type comb (7) rising inclination angle is 15-20 °, and longitudinal pitch is 140-160mm.
The utility model compared with prior art also has following major advantage:
1, the utility model adopt to intersect the splayed configuration comb, on cover refractory material, avoid the bottom protect brick also can because of be heated for a long time or transport in come off; Chain grate boiler design in the past, boiler drum bottom is directly exposed to and receives the high-temperature flue gas radiation in the burner hearth, heat transfer condition difference and possibly cause the generation of bulge phenomenon; Eight characters comb and river bottom protection brick, in transit or the burning be heated after, the river bottom protection brick is fragile; Still shell bottom fraction superheating phenomenon can occur takes place; The splayed configuration comb that intersects has solved the boiler drum bottom phenomenon of bulge of being heated, and makes heating surface area increase 1.5m2 (than Eight characters comb), and these all help reducing heating surface and arrange; Save steel, insulation material etc.Arrange single backhaul threaded flue in the drum, augmentation of heat transfer avoids former pair of backhaul to make the back tube sheet uneven problem of being heated.
2, the chiasma type comb has been arranged at burner hearth middle part, needs when face arch is built and intersects the splayed configuration comb and be connected as a single entity, and has just formed first and second backhaul of boiler on comb is built behind the refractory brick; It is first and second secondary furnace; Adopt the thick fire grate segment of chain, one-sided minute storehouse air-supply structure is more conducive to burning, after-flame; To guarantee safe operation of the boiler, be beneficial to the adjustment burning and regulate load.Avoid the transportation and be heated after can not come off; The chiasma type comb adopts 15-20 °, separation of two occurs and causes booster in order to prevent to intersect the comb the inside, and it is 140-160mm that chiasma type comb longitudinal pitch is set, and is convenient to guarantee enough heating surface areas, guarantees enough intensity simultaneously and makes pitch moderate.
3, the utility model mainly is that refractory brick, refractory concrete (thin layer), thermal insulation concrete are adopted in both sides; Exoperidium, link plate, this structure make operation complicated than before, but heat insulation effect is better; Outward appearance is also more attractive in appearance, and is easy to maintenance, and the boiler temperature outside can be controlled in below 50 ℃.
Description of drawings
Fig. 1 is a kind of shell type water-fire tube boiler water circulation structure sketch map of the utility model.
Fig. 2 is a kind of shell type water-fire tube boiler flue gas flow direction structural representation of the utility model.
Drum (1), steam outlet pipe (2), water inlet pipe (3), threaded flue tube bank (4), water screen tube (5), down-comer (6), chiasma type comb (7), refractory brick (8), left side collection case (9), right collection case (10), rear arch (11), burner hearth (12), face arch (13), fire grate (14), first secondary furnace (15), second secondary furnace (16).
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is further specified.
Like Fig. 1, shown in 2, a kind of shell type water-fire tube boiler, extreme misery pipe mix Natural Circulation traveling-grate stoker steam boiler.Boiler body and combustion apparatus join together through base, and face arch is built, rear arch furnace brickwork and insulation etc.
Boiler body arranges vertically that by single drum (1) drum (1) is positioned at burner hearth (12) top, and drum (1) is provided with water inlet pipe (3), steam outlet pipe (2); Drum (1) internal placement the threaded flue tube bank (4) of single backhaul, all be to weld threaded flue, burner hearth (12) both sides layout water screen tube (5); Arranged the face arch (13) of whole pouring and the rear arch (11) of building by laying bricks or stones in the burner hearth (12), left and right collection case (9), (10) are arranged on both sides under the drum (1), and water screen tube (5) upper end is connected with drum (1); The lower end is connected with left and right collection case (9) (10); Chiasma type comb (7) upper end on the right is connected with drum (1) lower left quarter, and the lower end collects case (10) with the right side and be connected, and is connected with drum (1) right lower quadrant on the chiasma type comb (7) on the left side; And the lower end is connected with left side collection case (9); The two ends of drum (1) are provided with down-comer (6), and with about collect case (9) (10) and be connected, all there is sewage draining exit at left and right collection case middle part with the drum rear portion.
Chiasma type comb (7) has been arranged at burner hearth (12) middle part; Refractory brick (8) on chiasma type comb (7) block, chiasma type comb (7) upper end on the right is connected with drum (1) lower left quarter, and the lower end is connected with right collection case (10); Chiasma type comb (7) upper end on the left side is connected with drum (1) right lower quadrant; And the lower end is connected with left side collection case (9), face arch (13) when building and chiasma type comb (7) be connected as a single entity, rear arch (11) is that secondary furnace enters the mouth when building and between the chiasma type comb (7); Constitute first secondary furnace (15), second secondary furnace (16), form first and second backhaul of boiler; Chiasma type comb (7) rising inclination angle is 15 °, and longitudinal pitch is 150mm.
Boiler has been arranged forward and backward smoke box.Back smoke box upper outlet links to each other with economizer, deduster with flue, and flue gas enters atmosphere through deduster, air-introduced machine through chimney stack; The fire grate governing box adopts infinitely variable speeds to drive, and adopts the thick fire grate segment of chain, and one-sided minute storehouse air-supply structure is more conducive to burning, after-flame; Arranged the face arch of whole pouring and the rear arch of building by laying bricks or stones in the burner hearth, the face arch overlay length is 671.5mm.Back wall leaves shoot door, and boiler left side wall leaves the access door that puts a chimney on the stove and make the fire draw, and is furnished with advanced dull and stereotyped water level meter; The electric pole type control of intaking automatically, overpressure protection, forced-and-induced draft fan open and close the chain automaton that waits; To guarantee safe operation of the boiler, be beneficial to the adjustment burning and regulate load.
Bunker coal is provided with the coal bunker entering through risen to the place ahead by coaling machine; Along with burning gradually before the fire grate and then at burner hearth; Flue gas is by the secondary furnace between rear arch (11) and chiasma type comb inlet, after getting into first and second burning chamber and fully burning, and flue gas first and second backhaul flue entering front smoke box through forming by chiasma type comb and drum; Get into the back smoke box through the single backhaul threaded flue tube bank that is built in the drum again, discharge through flue.Water gets into drum from water inlet, and cold water gets into left and right collection case through down-comer.In boiler heating process, the water in the left and right collection case is got back to drum through water screen tube and chiasma type comb with the carbonated drink admixture, and outwards carry the gas outlet of steam on drum.

Claims (2)

1. shell type water-fire tube boiler, comprise drum (1), fire grate (14), threaded flue (4), burner hearth (12), face arch (13), rear arch (11), about collect case (9,10), down-comer (6), water screen tube (5), chiasma type comb (7), drum (1) and be positioned at burner hearth (12) top, drum (1) is provided with water inlet pipe (3), steam outlet pipe (2); The single backhaul threaded flue tube bank of drum (1) set inside (4), water screen tube (5) is arranged in burner hearth (12) both sides, arranges whole pouring face arch (13) in the burner hearth (12) and builds rear arch (11) by laying bricks or stones; Left and right collection case (9) (10) is arranged on both sides under the drum (1), and water screen tube (5) upper end is connected with drum (1), and the lower end is connected with left and right collection case (9) (10); The two ends of drum (1) are provided with down-comer (6); And be connected with left and right collection case (9) (10), it is characterized in that: chiasma type comb (7), refractory brick (8) on chiasma type comb (7) block have been arranged in burner hearth (12) middle part; Chiasma type comb (7) upper end is connected with drum (1) lower left quarter; And the lower end is connected with right collection case (10), and chiasma type comb (7) upper end is connected with drum (1) right lower quadrant, and the lower end is connected with left side collection case (9); Face arch (13) when building and chiasma type comb (7) be connected as a single entity; For the secondary furnace inlet, constitute first secondary furnace (15), second secondary furnace (16) between rear arch (11) and the chiasma type comb (7), form first and second backhaul of boiler.
2. a kind of shell type water-fire tube boiler according to claim 1 is characterized in that: said chiasma type comb (7) rising inclination angle is 15-20 °, and longitudinal pitch is 140-160mm.
CN201220023628XU 2012-01-18 2012-01-18 Boiler-shell-type water-fire tube boiler CN202484960U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201220023628XU CN202484960U (en) 2012-01-18 2012-01-18 Boiler-shell-type water-fire tube boiler

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201220023628XU CN202484960U (en) 2012-01-18 2012-01-18 Boiler-shell-type water-fire tube boiler

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Publication Number Publication Date
CN202484960U true CN202484960U (en) 2012-10-10

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Country Status (1)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104654266A (en) * 2015-02-09 2015-05-27 昌图县锅炉制造厂 Water boiler with single boiler barrel and four return strokes

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104654266A (en) * 2015-02-09 2015-05-27 昌图县锅炉制造厂 Water boiler with single boiler barrel and four return strokes

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GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20121010

Termination date: 20130118