CN2046988U - Horizontal water mantle-tube hot-water boiler with multi return-strokes at normal pressure - Google Patents

Abstract

The utility model adopts an arch water jacket crossed drainage pipe big capacity furnace. The whole radiation heating surface is exposed out of the furnace. The radiant heat transfer effect is good. The flue gas with the high temperature reaches to a second return-stroke flue channel from a rear arch, scours a convection bank transversally and is guided to a chimney by a third flue channel. The omnidistance is a metallic convection heating surface without shielding and formed heating in and out the water jacket. The effective heating surface is increased greatly without increasing the volume of a furnace body. Consequently the furnace body is quick in heating up and high in heating effect. The utility model has the advantages of compact structure, small size, big cross sections of the second and the third flue channels and long flow path. The gas is expanded to reduce the speed when the gas flows across the horizontal water mantle-tube hot-water boiler with multi return-strokes at normal pressure, which is suitable for the sedimentation of the smoke and the dust.

Description

Horizontal water mantle-tube hot-water boiler with multi return-strokes at normal pressure

The utility model belongs to heating boiler.Be applicable to the heating of minimized office building and family.

The many backhauls fire tube boiler system that uses at present is made up of upper drum, next part case and convection bank.Horizontal smoke pipe is arranged on upper drum radius top, and from then on two return passes through.In the burner hearth, form the radiation of burner hearth heating surface by upper drum bottom half garden face and two side water wall tubes.Owing to there is refractory brick to build up every the cigarette insulated wall, radiation heating-surface is long-pending obviously to be reduced, there is a certain amount of stove fire to be radiated on the refractory material,, thereby the intensification and the thermal efficiency had a direct impact by refractory material conduction (radiation is than big many of the thermal conductivity factor of conduction).Second backhaul is discharged chimney by the non-heating surface of rear portion smoke box to horizontal smoke pipe parallel baffled.The fire tube sectional area diminishes suddenly, and resistance increases, and easy dust stratification is because of dust stratification has directly reduced thermal conductivity factor.When adding large-scale combustion unlatching air blast, dust stratification is serious in the fire tube, causes the ash disposal number of times frequent.Also because the upper drum moisture storage capacity is big, when adopting Natural Circulation, pot water circulating ratio is low, and the furnace heat stop is many, intensification is slow, the Natural Circulation weak effect.Moreover the vaporization of boosting easily during above-mentioned shutdown of boiler, the destruction interface that boosts, vaporization corrosion material increases incrustation scale, reduces the thermal efficiency and reduction of service life.

The present vertical atmospheric hot-water boiler that uses: its radiation heating-surface is long-pending little, and flue gas flow rate is fast, and stroke is short, and exhaust gas temperature height, the thermal efficiency obviously are lower than horizontal chamber furnace (oven).Because of natural circulation boiler will be lower than the heating system radiator, so the height of vertical boiler is more incompatible to Natural Circulation heating.

The demand of making the life better along with people and the restriction of the energy, people have proposed new requirement to heating boiler, simultaneously central heating can not be realized in a short time in only building of county, township, town's level, so cost is low, reliable in quality, small heater stove and accessory that performance is good have and use market widely.The utility model is exactly the high efficiency hot water space heating boiler of a kind of miniature energy-saving that provides in order to satisfy above-mentioned needs.

Fig. 1 is a front view of the present utility model, and Fig. 2 is a right side view of the present utility model.

Below in conjunction with accompanying drawing the utility model is introduced:

Form burner hearth (4) with the space that the many arch water jackets (3) that intersect cross current constitute, with arch water jacket 3) external communications of rear end has water leg rear arch (5), the rear end of arch water jacket (3) the upper and lower rectangular set casees in both sides (8), (2) and stove rear wall near, be spaced a distance with the stokehold wall, make the 3rd backhaul of from then on flowing through of two return flue gas.Following rectangular set case is communicated with the arch water jacket, last rectangular set case was communicated with oval water jacket by communicating pipe, be communicated with convection bank (6) up and down between rectangular set case (8), (2) and constitute the second backhaul flue, oval water jacket (11) lower side space in top constitutes the 3rd backhaul flue, oval water jacket (11) lower side space in top constitutes the 3rd backhaul flue (9), discharge through chimney (10) then, position three backhauls of chimney (10) are at the rear portion, and two backhauls forwardly.

Open fire door (15), coal is gone into fire grate (16), burning is after wall outlet (7) behind the burner hearth, inferoanterior second backhaul (rectangular set case (8) at rear arch (5) from both sides, (2) wash away oppositely stokehold of convection bank (6) between, uply go into the 3rd backhaul flue (9) to rear portion chimney (10) and discharge, water route: the arch water jacket (3) and the convection bank (6) that enter band intersection water pipe by return pipe and next part case (2), during boiler operatiopn, hot water enters upper collecting chamber (8) by convection bank (6), enter oval water jacket (11) by arch water jacket (3) through communicating pipe (13), be sent to heating system by outlet pipe (12).

Welding is all adopted in the connection of this stove metalwork.Except that the water jacket inside panel adopted the two sides fillet welding, all the other were single face fillet welding or downhand welding.

This stove water jacket, water pipe all are communicated with, and arch water jacket (3) communicates by several communicating pipes (13) with oval water jacket (11), form boiler water cycle.Except that arch, water jacket plane and ellipsoid add reinforcing bar with certain interval and draw the palm to gain in strength.

Cross pipe inclination certain angle, the distance of its centre-to-centre spacing fire grate are wanted suitably, and be big to prevent fractional cold, the influence fire prosperous.

The actual size of this stove each several part structure can be amplified 10 times, 15 times, 20 times, 25 times making by Fig. 1.For the boiler of different model, can reduce part or all of cross pipe, convection bank and upper and lower collection case number.

This stove can be made by plainly-packed or fast-assembling:

(1) plainly-packed: as Fig. 1, after each metalwork installation, both sides and front and back outer wall make it sealing with common brick base with the cement troweling.At the position of ash disposal easily dress ash door, remove once ash about one month.

(2) fast-assembling: segmentation is connected with screw with steel plate with the angle bar skeleton for both sides and front and back outer wall, the sealing of pinner cotton cord.At the position of ash disposal easily dress ash door.

Advantage of the present utility model:

(1) heating surface area is big, the thermal efficiency is high, naturally the sealing burner hearth that constitutes by the water jacket and the water pipe that intersects, do not need other to be incubated auxiliary material every cigarette, the all exposed burner hearth of radiation heating-surface, directly be subjected to fiery cigarette radiation, and compare with the type of furnace of exerting oneself, radiation heating-surface is long-pending can to increase 30%, thereby quick heating, thermal efficiency height (be higher than with exert oneself the type of furnace about 15%).

Second backhaul that upper and lower rectangular set case in hearth water sleeve both sides and convection bank are formed, the 3rd backhaul that the oval water jacket lower side space in top constitutes, it is long-pending not only to help being provided with convection heating surface, and form the hearth water sleeve inside and outside and be heated, than increasing about 30% with the type of furnace convection heating surface of exerting oneself is long-pending.

(2) volume little, in light weight, be convenient to install because radiation, convection heating surface is long-pending increases greatly, the stove volume ratio reduces about 30% with the type of furnace of exerting oneself; Steel consumption is lower than with exerting oneself about 20% of the type of furnace.

(3) quick heating, circulating ratio height: except that oval water jacket water layer thickness, all the other water jacket water layer thicknesses are 50～100mm, because water layer is thin, furnace heat stops few, quick heating, the circulating ratio height is not only applicable to mechanical cycles, more is applicable to Natural Circulation.

(4) this stove combustion space is big, sufficient combustion, reduced oke exhaust blackness, flue gas two, three backhauls of flowing through, the transversal flow convection bank is slowed down in twice unexpected dilatation of flue entrance, add that total flue gas flow is long, heat utilization ratio height not only, and make the flue dust that enters convection heating surface help sedimentation, do not establish the environmental requirement that deduster can reach the smoke evacuation dedusting in county and town's level.

(5) safe and reliable, explosion accident can not appear under any circumstance.

(6) manufacture craft is simple, and cost is low, and the life-span is long.

Because of being convenient to decompose making, assembled formation, being convenient to the horizontalization welding position and putting welding, help guaranteeing welding quality, have electric welding machine and soil to make manual veneer reeling machine can to produce.Because of being the normal pressure operation, the not high general A of material requirements ₃Steel plate gets final product, and because of normal pressure operation, difficult vaporization fouling, so material requirements is not high, the life-span is not low.

Claims (3)

1. horizontal normal-pressure hot-water boiler, by drum, convection bank and next part case are formed, it is characterized in that: with intersect the space that the arch water jacket (3) of cross current constitutes and form burner hearth (4), the burner hearth rear wall has exhanst gas outlet (7), with the external communications of arch water jacket (3) rear end water leg rear arch (5) is arranged, on the both sides of arch water jacket (3) have, following rectangular set case (8), (2), its rear end and stove rear wall near, front end and stokehold wall are spaced a distance, following rectangular set case (2) is communicated with arch water jacket (3), last rectangular set case (8) is by being communicated with oval water jacket (11) communicating pipe (13), on, be communicated with convection bank (6) between the following rectangular set case, constitute second backhaul, oval water jacket (11) lower side space constitutes the 3rd backhaul flue (9), top communicates with chimney (10), the position of chimney (10) is at the rear portion of boiler (three backhauls) or anterior (two backhauls), arch water jacket (3) has communicating pipe (13) to be communicated with the bottom of oval water jacket (11), delivery port is located at the top or the front portion of oval water jacket, and welding is all adopted in the connection of metalwork.

2. by the said hot-water boiler of claim 1, it is characterized in that:, can reduce part or all of cross pipe, convection bank and upper and lower collection case number the boiler of different model.

3. by the said hot-water boiler of claim 1, it is characterized in that: the thickness of water jacket inwall is 50～100mm except that oval water jacket.

Images