CN1034256A

CN1034256A - Vertical boiler

Info

Publication number: CN1034256A
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: 1989-07-26
Also published as: CN1012519B

Abstract

A kind of vertical boiler, adopt the plain furnace body structure, its flue courage body has an expansion loop (7) above the combustion zone, this expansion loop is in order to the axial thermal stretching of buffering flue, avoid furnace deformation or unstability, for guaranteeing that inner flue gas of the stove fully burns to reach the purpose of smoke abatement and dust control, on expansion loop, be provided with curved surface heat accumulation reflection chimney arch (6), and adopt vertical curved water pipe (3) structure and plain furnace top (2) structure that has impact tube (1), the pore that pushes up with plain furnace on its internal furnace is that radially pore is arranged, make the machining pore simple and easy to operate, this vertical boiler has removed the water pipe furnace grate in the double-layer grate, solved water pipe scaling problem.

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 and incrustation scale easy-clear not fully 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, causes booster to leak, and makes boiler can't carry out normal combustion, and water pipe furnace grate is welded on the furnace wall, brings difficulty for the maintenance replace tubes.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 cigarette hair 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 garden steel stay bolt usually or add one and enclose the means of stiffening ring with the protection flue on flue.

The objective of the invention is to solve relevant therewith all problems.Use technological means provided by the present invention, can avoid or reduce pipe scaling and prevent the boiler bladder body deformability, and can reach the purpose of smoke abatement and dust control.

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 the boiler operation principle is narrated

Fig. 1 is the part sectioned view of boiler

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.

Vertical boiler adopts the plain furnace body structure more, washed away by thermal-flame radiation and high-temperature flue gas for solving plain furnace, axial direction heated and the shortcoming that can not get cushioning of flue, on the plain furnace body that is positioned at above the furnace combustion zone territory, be provided with expansion loop (7) as flexible member to absorb the flue axial thermal expansion, 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.

At present, the fuel of boiler is based on fire coal, the flue gas that boiler is discharged is the serious source of atmospheric pollution, for guaranteeing that inner flue gas of the stove fully burns to reach the purpose of smoke abatement and dust control, this invention is provided with curved surface heat accumulation reflection chimney arch (6) on expansion loop, for the boiler that does not adopt swelling ring structure, can also in flue, establish a hoop chimney arch carriage in order to support curved surface heat accumulation reflection chimney arch.This chimney arch is made with special-shaped refractory material, and 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.After the burner hearth stable combustion condition, chimney arch is heated has saved a large amount of heat energy, penetrate intensity to making chimney arch produce the very big width of cloth, the expansion loop (7) that is provided with has dwindled the cross section of this position of burner hearth, because expansion loop makes the sudden contraction of burner hearth cross section, improved flue gas flow rate, to making 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, and flue gas and oxygen obtain fully mixed, have prolonged the time of staying of the particulate in the flue gas in burner hearth.For improving fire box temperature, make low-temperature flue gas burning in the burner hearth, can in the employed special-shaped refractory material of curved surface heat accumulation reflection chimney arch, the system of giving advance high temperature resistant far-infrared materials such as carborundum, perhaps at far ultrared paints such as the bottom of chimney arch brushing HK8HK9, or at the bottom of chimney arch lining one deck far infrared radiation net.Flue gas is lighted in the radiation areas of chimney arch and is caught fire, and the inflammable substance in the flue gas is fully burnt, and has reduced chemical imperfect combustion loss q like this ₃With the imperfect combustion loss of machinery q ₄This curved surface heat accumulation chimney arch is gone back the radiation fuel bed simultaneously, assisting new fuel bed to continue to light catches fire, to making bunker coal continuous burning in burner hearth, the high-temperature flue gas of sufficient combustion in the burner hearth, be passed in the tangential angle in space of chimney arch arranged around from bottom to up and have the smoke ventilator (8) of tapering, to making high-temperature flue gas form rotation at the chimney arch exhanst gas outlet, rotation produces centrifugal force, under action of centrifugal force, flying dust in the flue gas obtains separating nature, flue gas continues to rise in the flue of uprushing in the cross section, placed two-layer flue on the vertical curved water pipe in flue every brick (4), (5), flue gas washes away the water pipe and the inboard wall of furnace of convection heating surface with S shape.Flying dust in the flue gas under the gravity effect and and heating surface, flue falls under the collision of brick again naturally, makes the fly ash content in the flue gas fall the spit of fland greatly

For making flue gas rotation in the burner hearth, make soot combustion abundant, the present invention is provided with the secondary air device on vertical boiler.This secondary air device upper end joins with the Boiler Steam outlet valve, is shelved on the flue expansion loop (7) a plurality of air intake pipe orifices (9) five equilibrium of lower end.The secondary air device is introduced high steam from the steam outlet valve on boiler top during work, spray into burner hearth from air intake pipe orifice (9), the horizontal rotation of the interior flue gas generation of burner hearth is rotated with the tangential rising that flue gas takes place chimney arch combine, it is more abundant that inner flue gas of the stove is burnt, and reaches the purpose of smoke abatement and dust control.Perhaps because above-mentioned secondary air device introduces is high steam, when burner hearth internal cause anoxycausis is insufficient, the secondary air device can be hinged with 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 in the burner hearth, make the interior smoke combustion of burner hearth get more abundant.

At present, the vertical boiler of plain furnace body mostly is curved surface flue top and horizontal water tube structure, its courage cover head is flat first shape end socket or ellipse garden shape end socket, perforate on the end socket on perforate and the internal furnace is a non-radial hole, mechanical processing technique is complicated and need special technological equipment and brill film instrument, and man-hour, consumption was big.The present invention adopts plain furnace top (2) and vertical curved water pipe (3) structure that has impact tube (1), pore and end socket with the plain furnace top on the internal furnace are that radially pore is arranged (being shape hole, garden), and it makes the machining of pore simple and easy to operate.

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

Use vertical boiler of the present invention, solved boiler furnace flue temperature distortion, unstability, booster seepy question, prolonged the service life of flue.It is more abundant that the curved surface heat accumulation reflection chimney arch that is provided with gets stove internal combustion thing and smoke combustion, and 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, and 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, it is characterized in that the boiler bladder body has an expansion loop (7) above the furnace combustion zone territory, is 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,, it is characterized in that said curved surface heat accumulation reflects chimney arch and made by special-shaped refractory material according to claim 1,2 described boilers.

4, according to claim 1,2,3 said boilers, it is characterized in that low-temperature flue gas burns in advance in the burner hearth in order to make, high temperature resistant far-infrared materials such as carborundum can be given in the used special-shaped refractory material of chimney arch or 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.

5, according to the described boiler of claim 1, it is characterized in that for the boiler that does not adopt swelling ring structure, can in flue, establish a hoop chimney arch carriage in order to support chimney arch.

6, according to the described boiler of claim 1, it is characterized in that boiler is provided with a secondary air device, this device upper end joins with the Boiler Steam outlet valve, is shelved on the flue expansion loop (7) a plurality of air intake pipe orifices (9) five equilibrium of lower end.

7, according to claim 1,6 described boilers, it is characterized in that because the said secondary air devices of claim 6 introduce is high steam, when burner hearth internal cause anoxycausis is insufficient, the air intake pipe orifice of secondary air device can be hinged with on the furnace wall of furnace combustion zone by a sleeve pipe.

8, according to claim 1 described boiler, the courage top that it is characterized in that said plain furnace body is for having the plain furnace top (2) of impact tube (1).

9, according to claim 1,8 described boilers, it is characterized in that on the plain furnace body and the plain furnace top on pore be pore (being shape hole, garden) radially.

10, according to claim 1 described boiler, it is characterized in that boiler adopts 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.

11, according to claim 1,10 described boilers, it is characterized in that being provided with on the vertical curved water pipe (3) two-layer flue every brick (4), (5), it is made by special-shaped refractory material, and flue gas is risen with S shape stroke in flue.