CN2051327U - Double-layer flame shield of vertical handwarmer - Google Patents

Abstract

The utility model relates to a double-layer flame shield of a vertical hand warmer. The upper layer is a porous and arched fire resisting partition board, and the lower layer is a circular and arched fire resisting partition board which is provided with central window holes with flanges. The structure can strengthen the mixing and the burning between two chambers by stages. The radial flow of the flue gas near an outlet window is generated by means of double y-shaped sectional planes formed by the flanges of the outlet window on the lower layer flame shield so that the hedging stirring is formed by the air stream near the outlet window; therefore, the mixing in the large scale and the torrential flow stirring in the small scale are strengthened; then the preliminary smoke abatement is achieved. The high-speed thin air stream is generated by means of the hole canals of the upper layer flame shield in order to efficiently strengthen the torrential flow stirring in the small scale and the molecular diffusion; the carbon black is further burnt out; therefore, the smoke abatement is achieved. The utility model has the advantages of simple operation, energy saving and convenient maintenance.

Description

Double-layer flame shield of vertical handwarmer

The utility model relates to Industrial Boiler grate firing technical field, particularly vertical handwarmer engine firewall technical field.

Simple handwarmer has the fraud of serious over-emitting black exhaust, and is by environmental protection is not allowed, disabled.At present, handwarmer eliminates smoke and mainly takes measures from coal combustion mode aspect, main backfire and the coal gasification of adopting, but general back fire device such as naked light are counter to burn (comprising drawing plate lifting), double-layer grate etc., and not only structure is comparatively complicated, operation comparatively bothers, coal accommodation and Load Regulation speed are subjected to bigger restriction, and the reliability of work is relatively poor, and maintenance is also inconvenient.Little gas boiler also has analogue.Everything is totally unfavorable for the low capacity handwarmer.

Past also has and do not take the measure of eliminating smoke from the coal combustion mode from combustion space, mainly is to adopt various forms of individual layer chimney arch and secondary wind.The individual layer chimney arch comprises that sphere " ten " font arch, ring cap along arch, spherical honeycomb arch etc., are mainly used in heat storing and heat preserving; Because size of burner hearth is very little, arch is not good, and particularly a kind of arch is difficult to satisfy the needs that large scale (slightly) is mixed and small scale (carefully) is mixed simultaneously, thereby chimney arch is not strong to the hybrid perturbation effect of flue gas, and smoke effect is relatively poor; The chimney arch that has was thrown coal because of low also overslaugh is installed, and was eliminated already.Independent secondary wind, though its mixing, perturbation action are bigger, insulation effect is poor, smoke effect is restricted.And the secondary character and conduct bothers, and energy consumption, noise are also bigger.Simultaneously, because of the secondary wind of this class boiler is all made medium with steam, can not form secondary wind so when starting, often supply with because of no steam.Just because of there are the problems referred to above in secondary wind, therefore in handwarmer, seldom adopt secondary wind.Recently, there is unit to adopt secondary wind and spherical honeycomb arch simultaneously, obtained good smoke elimination and effect of coal saving.But should admit that the problems referred to above of secondary wind still exist, therefore, the application of this class device will be subjected to certain restriction.(document: " vertical low pressure steam boiler device for eliminating smoke and dust development " few big " Industrial Boiler " 1988. № 2 of JiNan HuaiYin low pressure Boiler Factory stone).

The purpose of this utility model is that the mixing and burning of strengthening furnace cavity stage by stage reaches the smoke elimination of handwarmer, subtracts dirt and purpose of energy saving by the two-layer multi-form engine firewall of serial connection.

The utility model is made up of the engine firewall of upper and lower two-layer interval arranged in series.The upper strata is a porous arc fire rated partition, and lower floor is then for having the ring-type arc fire rated partition of center flange fenestra.Porous arc engine firewall is a kind of arc, be covered with the dividing plate of flue gas circulation aperture on it; Ring-type arc engine firewall is then except having a large diameter center flange fenestra, and periphery also is furnished with a spot of grey aperture that falls.

Accompanying drawing 1 is a front view of the present utility model.

Accompanying drawing 2 is left views of the present utility model.

Below in conjunction with accompanying drawing structural principle of the present utility model and operation principle are done detailed explanation

In the accompanying drawing, (1) is that ring-type arc engine firewall, (2) of lower floor are upper strata porous arc engine firewalls.Ring-type arc engine firewall (1) has center flange fenestra (3) and goes on foot a small amount of ash-falling hole (4) of putting at periphery; The flue gas opening (5) that is covered with minor diameter on the porous arc engine firewall (2).In addition, (9) are that fixed grate, (10) are the fire doors of the coal and the usefulness of slagging tap.

Double-deck engine firewall is separated into three parts with boiler furnace, i.e. the burning principal space (6) of bottom, the burning interlayer (7) of centre and the after-flame space (8) on top.The structural pattern energy separately-fired stage of this burner hearth, and at the corresponding effectively mixed structure of different mixed nature application of each stage.That is: phase I, utilize lower floor's ring-type arc engine firewall to strengthen the mixed combustion of the burner hearth principal space (6), mainly be incubated, strengthen the lateral flow of flue gas this moment by the engine firewall radiation, increase the flammable matter concentration of the burner hearth principal space, increase generation that gas residence time reduces carbon black, promote its burning, and prevent flying out of duff.Second stage, utilize two " people " shaped sections that flange constituted of lower floor's engine firewall outlet window, produce near the Radial Flow of the flue gas outlet window, make air-flow form the stirring that liquidates there, use and strengthen large scale mixing, microturbulence disturbance, reach preliminary smoke elimination.Phase III, utilize intermediate course (7) between two engine firewalls to carry out horizontal mixed flow after, air-flow disperses to enter in the duct of porous barrier equably.In the duct, the high speed thread can be strengthened microturbulence disturbance and molecular diffusion effectively, and heat transfer and insulation have then been strengthened in the solid radiation of dividing plate hole wall.Everything all helps the further after-flame of carbon black, thereby reaches smoke elimination.

In a word, double-deck engine firewall of the present utility model is with the difference that individual layer in the past encircles: (1) rebuilding; (2) two-layer engine firewall has different shapes, to adapt to local blending characteristics. Like this, just can effectively strengthen stage by stage the mixing and burning in space. Namely utilize liquidating of air-flow to stir large scale (slightly) mixed combustion of strengthening early stage, utilize multi-pore channel to burn to strengthen small scale (carefully) mixed combustion in later stage. Therefore, smoke eliminating energy-saving effect is better than any individual layer arch, can reach discharging standards, and can cancel the water pipe of upper furnace, to vacate the position, is convenient to arrange the upper strata engine firewall. Add spherical honeycomb arch system system with existing secondary steam wind and compare, this double-layer clapboard is not because adopting secondary steam wind, thereby simple to operate, energy savings, easy to maintenance, and cost is also low.

Claims (2)

1, double-deck engine firewall, by engine firewall (1) and last engine firewall (2) are formed down, of the present utility model being characterised in that, following engine firewall (1) has central circular flange fenestra (3), whole lower clapboard in the form of a ring, arc, its cross sectional shape is two " people " fonts, peripheral dispersed placement at central circular flange fenestra (3) has grey aperture (4), last engine firewall (2) is porous plate, arc, and upper and lower engine firewall is to arrange at interval, keeps certain distance between the two.

2, double-deck engine firewall according to claim 1 is characterized in that, on the following engine firewall (1) fall grey aperture (4) but also double as flue gas opening.