CN2045058U

CN2045058U - Front-burning / back-burning coal combustion device

Info

Publication number: CN2045058U
Application number: CN 89200858
Authority: CN
Inventors: 代伯清
Original assignee: Individual
Current assignee: Individual
Priority date: 1989-01-19
Filing date: 1989-01-19
Publication date: 1989-09-27

Abstract

The utility model relates to a front-burning/back-burning coal combustion device composed of an upper hearth, a lower hearth, grates and a smoke flue, the structure of which is charactarized in that a transfer valve is arranged between a top and a bottom outlets through which the smoke flue is communicated with the upper hearth and the lower hearth. The utility model can carry out both front-burning and back-burning, having a plurality of uses in cooking, heating, heat supply, steam supply, etc., achieving purposes of eliminating black smoke and improving indoor-outdoor environment.

Description

Front-burning / back-burning coal combustion device

The utility model relates to coal fixed grate burner, particularly a kind of front-burning/back-burning coal combustion device.

At present, widely used fixed grate coal combustion device has the mode of just burning, and promptly air is upward through the coal seam from the fire grate bottom, and the process that the burning flame makes progress is as small stationary furnace grate, domestic briquet stove etc.; Also have anti-burning mode, promptly air is passed down through the coal seam from fire grate top, and burning flame downward process is as small-sized Micropressure boiler etc.Just the burning mode has device simple, and combustion flame can be used for the characteristics of multiple occasion, is easy to over-emitting black exhaust but also have when adding new coal, and the coal gas or the dust of generation leak problem of environment pollution caused.Though anti-burning mode has overcome the shortcoming of the mode of just burning, downward because of its flame, make its scope of application that certain limitation arranged.

The purpose of this utility model is exactly in order to overcome above-mentioned deficiency of just burning with anti-coal-fired stove, and a kind of the holding concurrently of design just burnt the advantage front-burning/back-burning coal combustion device of mode and anti-burning mode.

The purpose of this utility model is finished as follows: between upper furnace and lower hearth fire grate is housed, upper furnace and lower hearth each have an outlet and communicate with flue, between upper furnace outlet and lower hearth outlet changeover valve is housed, this changeover valve can be closed upper furnace outlet or lower hearth outlet.In view of the above, just can be implemented in two kinds of fired states that can just burn on the same fire grate and can instead burn, when purposes that this stove will be penetrated based on the width of cloth as cooking etc., as the cooking of cooking, can use and just burn mode, be about to change valve plate and close the lower hearth outlet downwards, the upper furnace outlet is opened; When this stove needs to add new coal in stove, can use anti-burning mode, be about to changeover valve and close the upper furnace outlet, the lower hearth outlet is opened.

Fire grate of the present utility model is with stacked and staggered form about the water pipe furnace grate of nonmetal fire grate and heat exchanging water pipe's composition.

Adopt the front-burning/back-burning coal combustion device of above scheme, can be used for various small-sized coal-fired furnace kilns or kitchen range, it has simple structure, make full use of the characteristics of two kinds of combustion systems advantage separately, and be independent of each other, realize multiple uses such as cooking, heating heat supply steam supply, reached the elimination black smoke, improve the purpose of indoor health and outdoor environment health.

Describe the utility model in detail below in conjunction with accompanying drawing.

Fig. 1 is a schematic diagram of structure of the present utility model.

Fig. 2 is that the utility model is used for the structure on the miniature boiler.

Fig. 3 is that the utility model is used for the structure on the domestic honeycomb coal stove.

Wherein: the nonmetal fire grate 2--of 1--water pipe furnace grate 3--upper furnace 4--lower hearth 5--changeover valve 6--is outlet 7--upper outlet 8--flue 9--upper furnace door 10--lower furnace door 11--storage thermic devices 12--pipeline 13--cooker down

This front-burning/back-burning coal combustion device is the same with general stove kitchen range when just burning, opening upper furnace door (9) is placed on coal on the nonmetal fire grate (1), changeover valve (5) put down cover down outlet (6), open lower furnace door (10), promptly become normal combustion process, air enters from lower furnace door and passes nonmetal fire grate (1) and water pipe furnace grate (2), it is combustion-supporting to enter the coal seam, and the combustion product gases of generation washes away cooker (13) or absorber emits heat after upper outlet (7) to chimney (8) is discharged.When in combustion process, needing to add coal, earlier changeover valve (5) is upwards barred up upper outlet (7), close lower furnace door (10), open upper furnace door (9), promptly enter anti-burning mode state this moment, be that new coal adds on the coal-fired layer, air enters from upper furnace door (9), through new coal seam, pass in turn flue gas that the combustion-supporting back of burning zone produces pass nonmetal fire grate (1) and water pipe furnace grate (2) to lower hearth (4) through outlet (6) down to the chimney discharge, firing on the coal seam at the stylish interpolation coal of anti-burning mode and to be toasted, then based on gasification of combustible material pass high temperature burning zone and by after-flame, small carbon granule (this carbon granule is the source of chimney over-emitting black exhaust just) that new interpolation coal fissions out because of high-temperature baking, a part when passing the coal seam by under the detention, a part by after-flame, therefore can make oke exhaust blackness be controlled at the degree of Lin Geman below 1 grade when passing coal-fired layer.Can improve the hygienic conditions of indoor and outdoor effectively, its heat of flue gas that produces during anti-the burning is store thermic devices by water pipe, water jacket and is absorbed.Be made for the usefulness of hot water, heating, steamed rice or do baking etc.Because it is consistent that air flow and coal are drawn the stove direction, last lower hearth all is in negative pressure state (and first the turning back again of air-flow upwards has an infall process) downwards, so dust and pernicious gas are drained toward the indoor and outdoor may be little, when the time spent that still need just burn, need only be in a little time of anti-burning state work, when treating that the new coal that adds has entered stable destructive distillation or coking combustion process, there has not been violent gasification, and combustion, no longer produce black smoke, so changeover valve (5) is closed the outlet (6) of staying downwards, open upper outlet (7), open lower furnace door (10), open upper furnace door (9), promptly enter the state that just burning again, whole process need only be carried out the switch of three valves and just can be finished, and is simple, than common coal-fired furnace kiln kitchen range operation only many program of an operation changeover valve (5).

Claims

1, a kind of front-burning/back-burning coal combustion device of being made up of upper furnace, lower hearth, fire grate and flue is characterized in that: flue communicate with upper furnace and lower hearth two up and down the outlet between changeover valve is housed.

2, according to the described front-burning/back-burning coal combustion device of claim 1, it is characterized in that: fire grate is stacked up and down and be staggered and form by nonmetal fire grate and heat exchanging water pipe.