CN1012519B

CN1012519B - Vertical boiler

Info

Publication number: CN1012519B
Application number: CN 89105211
Authority: CN
Inventors: 王家德
Original assignee: ENVIRONMENT PROTECTION BOILER PLANT JINAN CITY
Current assignee: ENVIRONMENT PROTECTION BOILER PLANT JINAN CITY
Priority date: 1989-01-16
Filing date: 1989-01-16
Publication date: 1991-05-01
Also published as: CN1034256A

Abstract

The present invention relates to a vertical boiler which adopts a structure of a flat boiler liner body. The liner body of the boiler liner of the vertical boiler is provided with an expansion ring (7) above a combustion zone, and the expansion ring is used for buffering the axial thermal elongation of the boiler liner and avoiding the deformation or the instability of the boiler liner; in order to ensure the sufficient consumption of smoke in the vertical boiler to achieve the goals of smoke elimination and dust removal, a curved-surface heat-storing reflecting boiler arch (6)is arranged on the expansion ring (7), and the present invention adopts a structure of a vertical bent water pipe (3) and a structure of a flat boiler liner top (2) with a cupola pipe (1); pipe holes on the boiler liner and the flat boiler liner top are in radial arrangement so that the pipe holes have convenient and easy operation for mechanical processing. The vertical boiler removes a water-pipe fire grate in a double-layer fire grate and solves the problem of scale formation of the water pipe.

Description

Vertical boiler

The present invention relates to a kind of follow-on vertical boiler, it adopts the plain furnace body structure, in the combustion zone of boiler, an expansion loop is arranged on the plain furnace body, is provided with curved surface heat accumulation reflection chimney arch on expansion loop, and adopts vertical curved water pipe structure.

At present, vertical steam, hot water, tea boiler adopt the double-layer grate structure more, this version is divided into upper and lower two-layer burner hearth with burner hearth, it adopts horizontal water tube as upper grate, is called water pipe furnace grate, and the water circulation in the water pipe is natural circulation mode, body refuse in the water pipe pipeline section has the possibility of deposition, also can produce separation of two and flow, scaling easily, incrustation scale can stop up water pipe safety and incrustation scale easy-clear not when serious.Because water pipe furnace grate is arranged in the high temperature combustion zone of burner hearth, when incrustation scale stops up, because water pipe can not get good heat transfer boundary condition, the tube wall wall temperature is too high to making, oxidation comes off from level to level in high temperature, cause booster to leak, make boiler can't carry out normal combustion, and water pipe furnace grate is welded on the furnace wall, bring difficulty for the maintenance replace tubes, " Industrial Boiler safe practice " book P83～P87 that in June, 1981, Chemical Industry Press published, Fig. 2-8 has provided a kind of " vertical straight water pipe boiler ", and it is by flue, the flue top, drum, end socket, parts such as water pipe are formed, this boiler is divided into, two save down, on, lower perforated plate is pulled behind the limit respectively with last, following shell welding, on, rise tube bank and a down-comer are housed, last between the lower perforated plate, following shell is linked to be an integral body.But when this boiler has one to be duty than distinct issues, because down-comer is different with the tube wall temperature of the tube bank of rising, its thermal expansion is extended different and is caused near near a tube head seepage of the enclosing down-comer, this individual layer fire grate hand-fired boiler also exists the thermal efficiency low, the shortcoming that smoke density is big.The flue of vertical boiler adopts the plain furnace structure more in addition; plain furnace is washed away by the radiation of thermal-flame and high-temperature flue gas directly; its axial direction heated expansion and extending; flue produces bigger stress; because the axial thermal stretching of flue can not get buffering, can make furnace deformation or unstability, therefore; for addressing this problem, people adopt the round steel stay bolt usually or add one and enclose the means of stiffening ring with the protection flue on flue.

The object of the invention provides such vertical boiler device, adopt swelling ring structure to prevent the boiler bladder body deformability, above expansion loop, shelve curved surface heat accumulation reflection chimney arch strengthening smoke medicining dust-removing effect, and adopt plain furnace top and vertical curved water pipe structure to simplify the boiler processing technology and avoid or reduce pipe scaling.

For achieving the above object, the invention provides a kind of vertical boiler, this boiler adopts the plain furnace body structure.The boiler bladder body has an expansion loop above the furnace combustion zone territory, for guaranteeing that inner flue gas of the stove fully burns, be provided with curved surface heat accumulation reflection chimney arch on expansion loop, for preventing pipe scaling, removes water pipe furnace grate in flue tube structure, adopts vertical curved water pipe structure.

Below in conjunction with accompanying drawing operation principle of the present invention is described in detail:

Fig. 1 is the partial sectional view of boiler integral body;

Fig. 2 is the front view of camber reflection chimney arch and expansion loop;

Fig. 3 is the vertical view of curved surface heat accumulation reflection chimney arch;

This vertical boiler adopts the plain furnace body structure, it is made up of parts such as flue, flue top, drum, end socket, water pipes, be provided with on the plain furnace body of the present invention above flue is positioned at the furnace combustion zone territory expansion loop (7) as flexible member to absorb the flue axial thermal expansion, for guaranteeing that inner flue gas of the stove fully burns, reaches the purpose of smoke abatement and dust control, this invention is provided with curved surface heat accumulation reflection chimney arch (6) on expansion loop, this chimney arch is made with materials such as special-shaped refractory materials.In the tangential angle in chimney arch arranged around space and have the smoke ventilator (8) of tapering, smoke ventilator is not arranged in the central area of chimney arch.For improving fire box temperature, make low-temperature flue gas burning in the burner hearth, can in the used material of curved surface heat accumulation reflection chimney arch, add high temperature resistant far-infrared materials such as advancing carborundum, perhaps at far ultrared paints such as the brushing of the bottom of chimney arch HK8, HK9, or at the bottom of chimney arch lining one deck far infrared radiation net.

Boiler of the present invention, also be provided with the secondary air device, this secondary air device upper end joins with the Boiler Steam outlet valve, be shelved on the flue expansion loop (7) a plurality of air intake pipe orifices (9) five equilibrium of lower end, perhaps, do not reach the purpose of smoke abatement and dust control for avoiding stove internal cause anoxycausis insufficient.Also can be installed in above-mentioned secondary air device on the furnace wall of furnace combustion zone by a sleeve pipe, the secondary air device sprays into high steam and makes flue gas rotation in the burner hearth in burner hearth so on the one hand, air injection from the slit of sleeve pipe and secondary wind inleting tube enters burner hearth on the other hand, increase the oxygen content of burner hearth, make the interior smoke combustion of burner hearth get more abundant.

Vertical boiler of the present invention is the plain furnace top (2) that has impact tube (1), and adopt vertical curved water pipe (3) structure, it can guarantee on the courage body and the pore and the end socket on plain furnace top are radially pore arrangement, and it makes the machining of pore simple and easy to operate.

Boiler of the present invention adopts vertical curved water pipe (3) structure, wherein the angle of bend of the curved water pipe of part is bigger, and the more piece bending is arranged, and on vertical curved water pipe, be provided with two-layer flue every brick (4), (5), it makes flue gas rise with S shape stroke, is beneficial to washing away and guarantee effective heat exchange furnace wall.

Below the duty of boiler is narrated:

Air enters cinder chamber, pass fire grate from bottom to up, give the oxygen supply of fuel coal seam, fuel bed burns, after the burner hearth stable combustion condition, the curved surface heat accumulation, reflection chimney arch (6) is heated has saved a large amount of heat energy, cause chimney arch to produce very big radiation intensity, the expansion loop (7) that is provided with absorbs the axial thermal expansion of flue on the one hand as flexible member, make the axial thermal stress of plain furnace axially obtain very big compensation, can prolong the life-span of flue, the lateral stiffness of expansion loop (7) is bigger, its stability than plain furnace for good; Expansion loop (7) has dwindled the cross section of this position of burner hearth on the other hand, because expansion loop makes the sudden contraction of burner hearth cross section improve flue gas flow rate, cause sweep of gases that the chimney arch central area of smoke ventilator is not set, make flue gas run into the chimney arch surface, in burner hearth, blow into simultaneously secondary wind, flue gas is rotated in burner hearth form rotary combustion, flue gas is fully mixed with oxygen, prolonged the time of staying of particulate in burner hearth in the flue gas, flue gas is lighted in the radiation areas of chimney arch and is caught fire, inflammable substance in the flue gas is fully burnt, reduced chemical imperfect combustion loss q like this ₃With the imperfect combustion loss of machinery q ₄The high-temperature flue gas of burning passes the smoke ventilator on the curved surface chimney arch, forms the secondary rotation at furnace outlet, and rotation produces centrifugal force, and under action of centrifugal force, the flying dust in the flue gas obtains separating nature.Flue gas continues to rise in the flue of uprushing in the cross section, the two-layer flue of placing on the vertical curved water pipe in flue makes flue gas wash away the water pipe and the inboard wall of furnace of convection heating surface with S shape every brick (4), (5), flying dust in the flue gas under the gravity effect and and heating surface, flue falls under the collision of brick again naturally, and the fly ash content in the flue gas is reduced greatly.

Use vertical boiler of the present invention, solved boiler furnace flue temperature distortion, unstability, booster seepy question, prolonged the service life of flue.The curved surface heat accumulation reflection chimney arch that is provided with makes interior combustible of stove and smoke combustion get more abundant, the fly ash content of flue gas is reduced greatly, and adopt the plain furnace roof construction of vertical curved water pipe structure and employing, simplified the mechanical processing technique of boiler, owing to removed water pipe furnace grate, avoided the incrusted problem of water pipe furnace grate.

Claims

1, a kind of vertical boiler, it adopts the plain furnace body structure, form by parts such as flue, flue top, drum, end socket, water pipes, it is characterized in that the courage body has an expansion loop (7) above the furnace combustion zone territory, be provided with curved surface heat accumulation reflection chimney arch (6) on the expansion loop.

2,, it is characterized in that having arranged the smoke ventilator (8) that several have the tangential angle in space and have tapering on the curved surface heat accumulation reflection chimney arch (6) according to the described boiler of claim 1.

3, according to claim 1 or 3 described boilers, it is characterized in that said curved surface heat accumulation reflection chimney arch, make by materials such as special-shaped refractory materials.

4,, it is characterized in that high temperature resistant far-infrared materials such as carborundum to be added in the used material of chimney arch or at far ultrared paint such as the brushing of the bottom of chimney arch HK8, HK9 or at the bottom of chimney arch lining one deck far infrared radiation net according to claim 1 or 3 described boilers.

5, according to the described boiler of claim 1, it is characterized in that also comprising a secondary air device, this device upper end joins with the Boiler Steam outlet valve, and a plurality of air intake pipe orifices (9) of lower end etc. are shelved on respectively on the flue expansion loop (7).

6,, it is characterized in that and the air intake pipe orifice of this air-intake device can be installed on the furnace wall of furnace combustion zone by a sleeve pipe according to the described boiler of claim 5.

7, according to the described boiler of claim 1, the courage that it is characterized in that described plain furnace body is for having the plain furnace top of impact tube (1).

8, according to claim 1 or 8 described boilers, it is characterized in that on the plain furnace body and the plain furnace top on pore be pore radially.

9, according to the described boiler of claim 1, it is characterized in that adopting vertical curved water pipe (3) structure, wherein the angle of bend of the curved water pipe of part is big and the more piece bending arranged.

10, according to claim 1 or 9 described boilers, it is characterized in that being provided with on the vertical curved water pipe (3) two-layer flue every brick (4), (5), flue gas is risen with S shape stroke in flue.