CN207674429U - The mixed combustion high moisture fuel burner hearth of gas-solid - Google Patents

Abstract

The utility model discloses a kind of mixed combustion high moisture fuel burner hearth of gas-solid, including furnace body, the front end of the furnace body offers feed inlet, the rear end of the furnace body is equipped with burner, at least two sequentially connected reciprocal grates are installed in the furnace body, the front end of the first reciprocal grate is connected at the feed inlet, the middle front part of the last one reciprocal grate of the spray combustion mouth face of the burner；Between two adjacent reciprocal grates, the upright position of the rear end of the reciprocal grate of front side is higher than the front end of the reciprocal grate of rear side.Solves the problems such as fire retardant current boiler high-moisture biomass fuel, over-emitting black exhaust, incomplete combustion；Its is simple in structure, easy maintenance.

Description

The mixed combustion high moisture fuel burner hearth of gas-solid

Technical field

The utility model is related to boiler combustion equipment, the mixed combustion high moisture fuel burner hearth of specially a kind of gas-solid.

Background technology

The biomass fuel of green regenerative energy sources is with its energy-saving and environmental protection and the advantages that increased income for the people, as boiler Fuel is widely used among field of boilers, but fresh biomass water-in-fuel rate is high, such as its moisture content of the dregs of a decoction of pharmaceutical factory It is more up to 55% or more, spontaneously dries that the time is also very long, as naturally dry by 5 months after fresh bark indoors stacking Dry, moisture content is just reduced to 44% from 59%；Fuel moisture is high, and burning is difficult.

To applied to the high-moisture biomass fuel on boiler, traditional way is：First dries or " dry+be pressed into Type " reduces its moisture, then puts into combustion apparatus, to ensure the normal operation for stablizing burning and boiler of fuel；Drying or " drying+compression moulding " is the secondary operation of fuel, can all increase the use cost of boiler, the cost of " drying+compression moulding " Even up to 1 times of original fuel cost, to the place of production of high-moisture biomass fuel, direct plunges into boiler and burns, and ensures Burning is complete, undoubtedly upper choosing.

High-moisture biomass boiler its combustion plant on the market at present, although much taking " suspension combustion+layer fires " The combustion system for overcoming high-moisture biomass fire retardant as possible, but because some biomass moisture are really too high, it will usually fire The problems such as expecting fire retardant, over-emitting black exhaust, incomplete combustion causes the energy of pollution and the waste of environment.

Utility model content

The shortcomings that in order to overcome the prior art to refer to, the utility model provide a kind of mixed combustion high moisture fuel combustion furnace of gas-solid Thorax integrates drying and " firing three-in-one combustion system in floor combustion+suspension combustion+room ", solves current boiler high-moisture life The problems such as biomass fuel is fire retardant, over-emitting black exhaust, incomplete combustion, efficiently to high-moisture (moisture may be up to 60%) biomass fuel Progress is abundant, burns steadily.

The utility model solve technical solution that its technical problem uses for：The mixed combustion high moisture fuel burner hearth of gas-solid, Including furnace body, the front end of the furnace body offers feed inlet, and the rear end of the furnace body is equipped with burner, pacifies in the furnace body Equipped at least two sequentially connected reciprocal grates, the front end of the first reciprocal grate is connected at the feed inlet, described The middle front part of the last one reciprocal grate of the spray combustion mouth face of burner；Between two adjacent reciprocal grates, Front end of the upright position of the rear end of the reciprocal grate of front side higher than the reciprocal grate of rear side.Wherein, described reciprocal The quantity of fire grate is two, respectively high-order reciprocal grate and low level reciprocal grate, the rear end of the high position reciprocal grate with it is low The difference in height of the front end of position reciprocal grate is 0.8~1.5 meter；Difference in height is come with the height of its moisture of high-moisture biomass fuel Correspondingly increase and decrease, when moisture is 50%, difference in height is 0.9 meter, and when moisture is 60%, difference in height is then 1.5 meters.

The reciprocal grate is in be obliquely installed with horizontal plane.

Further include having gasification of biomass generator, the gasification of biomass generator connects the burner.Biomass Fuel (non-high-moisture) gasifies in gasification of biomass generator generates biological fuel gas, and room combustion combustion is carried out by burner It burns, the thermal-flame of burning is ejected on the layer combustion fuel of reciprocal grate in furnace body, strengthens its burning, moisture therein quilt completely It dries and as reciprocal grate pushes, is able to gradually after-flame.

The furnace body is mainly made of burner hearth face arch, burner hearth rear arch, preceding wall, back wall and both sides wall, the burner hearth Face arch and burner hearth rear arch thickness are 420mm, are made of the refractory concrete of 300mm thickness and 120 thick thermal insulation concretes.When with When boiler coordinates, burner hearth face arch can be also bent by the preceding water-cooling wall of boiler, and the preceding water-cooling wall at face arch applies 120mm thickness fire resistings The wall with refractory lining, refracto of concrete.The thickness of the preceding wall, back wall and both sides wall is the heavy boiler setting of 500mm thickness, by internal layer The refractory brick of 230mm thickness, the thermal insulation material aluminium silicate fiber peacekeeping outer layer 240mm of middle level 30mm thickness common brick be built into.

It is also equipped with air-drying device in the furnace body, overfiren air port specially is set in high-order reciprocal grate rear end lower, 20~30 ° obliquely of spout；It is respectively provided with tertiary air orifice in domed end to the both sides wall between back wall before burner hearth, spout is oblique Downward 20~35 °；Air-dried furnace wall is additionally provided in the furnace body, air-dried furnace wall is generally the refractory concrete of 310mm thickness, air-dried The air hose of device is wrapped with thermal insulation, in order to avoid burn out air hose.

Inspection door and shoot door are offered on the furnace body, convenient for checking, seeing fire and deashing.

The utility model has the beneficial effects that：The mixed combustion high moisture fuel burner hearth collection drying of gas-solid and " layer combustion+suspension combustion Fire three-in-one combustion system in burning+room " it is integrated, solve fire retardant current boiler high-moisture biomass fuel, over-emitting black exhaust, burning The problems such as incomplete；Its is simple in structure, easy maintenance；High moisture fuel enters high-order reciprocal grate by feed inlet first, It is able to drying and a small amount of burning on high-order reciprocal grate, is fallen later to low level reciprocal grate front end with certain difference in height, By the supporting of red-hot flue gas and Secondary Air in burner hearth in the process of whereabouts, further dry, moisture therein further by Drive away, light-weight part carries out suspension combustion in burner hearth, and the part of weight weight falls the middle front part in low level fire grate, continue into The combustion burning of row layer.

Description of the drawings

Fig. 1 is the structural schematic diagram of the mixed combustion high moisture fuel burner hearth of gas-solid；

Fig. 2 is the mixed combustion high moisture fuel burner hearth furnace structure schematic diagram of gas-solid.

Specific implementation mode

The utility model is further detailed below in conjunction with the accompanying drawings.

As depicted in figs. 1 and 2, a kind of gas-solid, which mixes, fires high moisture fuel burner hearth, including furnace body 1, before the furnace body 1 End offers feed inlet 19, and the rear end of the furnace body 1 is equipped with burner 2, at least two are equipped in the furnace body 1 successively The reciprocal grate of connection, the reciprocal grate are in be obliquely installed with horizontal plane；The front end of the first reciprocal grate is connected to institute It states at feed inlet 19, the middle front part of the last one reciprocal grate of the spray combustion mouth face of the burner 2；Adjacent two Between the reciprocal grate, before the upright position of the rear end of the reciprocal grate of front side is higher than the reciprocal grate of rear side End；Inspection door 17 and shoot door 18 are further opened on the furnace body 1.Wherein, the quantity of the reciprocal grate is two, respectively High-order reciprocal grate 41 and low level reciprocal grate 42, the front end of the rear end and low level reciprocal grate 42 of the high position reciprocal grate 41 Height difference H be 0.8~1.5 meter；Difference in height correspondingly increases and decreases with the height of high-moisture biomass fuel its moisture, works as water When being divided into 50%, difference in height is 0.9 meter, and when moisture is 60%, difference in height is then 1.5 meters.

As shown in Figure 1, the furnace body 1 is mainly by burner hearth face arch 14, burner hearth rear arch 15, preceding wall 11, back wall 12 and two Side wall body 13 forms, and the burner hearth face arch and burner hearth rear arch thickness are 420mm, thick by the refractory concrete of 300mm thickness and 120 Thermal insulation concrete composition.When coordinating with boiler, burner hearth face arch can be also bent by the preceding water-cooling wall of boiler, at face arch Preceding water-cooling wall applies the wall with refractory lining, refracto of 120mm thickness refractory concretes.The thickness of the preceding wall, back wall and both sides wall is The heavy boiler setting of 500mm thickness, by the refractory brick of internal layer 230mm thickness, the thermal insulation material aluminium silicate fiber peacekeeping outer layer of middle level 30mm thickness The common brick of 240mm is built into.

It is also equipped with air-drying device 5 in the furnace body 1, Secondary Air specially is set in high-order reciprocal grate rear end lower Mouthful, 20~30 ° obliquely of spout；It is respectively provided with tertiary air orifice in domed end to the both sides wall between back wall before burner hearth, is sprayed 20~35 ° obliquely of mouth；Air-dried furnace wall 16 is additionally provided in the furnace body, air-dried furnace wall is generally the refractory concrete of 310mm thickness, The air hose of air-drying device 5 is wrapped with thermal insulation, in order to avoid burn out air hose.

As shown in Fig. 2, further including having gasification of biomass generator 3, the gasification of biomass generator 3 connects the burning Device 2.Biomass fuel (non-high-moisture) gasifies in gasification of biomass generator generates biological fuel gas, passes through burner Room combustion burning is carried out, the thermal-flame of burning is ejected on the layer combustion fuel of reciprocal grate in furnace body, strengthens its burning, therein Moisture is oven-dried and completely as reciprocal grate pushes, and is able to gradually after-flame.Gasification of biomass generator and reciprocal grate Feed loading ratio is correspondingly increased and decreased by the height of high-moisture biomass fuel its moisture, through experiment, when moisture is 50%, The former is (charging of gasification of biomass generator is for amount) D1:The latter (reciprocal grate charging is for amount) D2 ≈ 1:6, when moisture is 60% When, D1:D2≈1:5.

Claims (7)

1. a kind of mixed combustion high moisture fuel burner hearth of gas-solid, including furnace body, which is characterized in that the front end of the furnace body offers The rear end of feed inlet, the furnace body is equipped with burner, and at least two sequentially connected reciprocating furnaces are equipped in the furnace body Row, the front end of the first reciprocal grate is connected at the feed inlet, the spray combustion mouth face of the burner the last one The reciprocal grate；Between two adjacent reciprocal grates, the upright position of the rear end of the reciprocal grate of front side is high In the front end of the reciprocal grate of rear side.

2. the mixed combustion high moisture fuel burner hearth of gas-solid according to claim 1, which is characterized in that the reciprocal grate Quantity is two, and respectively high-order reciprocal grate and low level reciprocal grate, the rear end of the high position reciprocal grate and low level are reciprocal The difference in height of the front end of fire grate is 0.8~1.5 meter.

3. the mixed combustion high moisture fuel burner hearth of gas-solid according to claim 1 or 2, which is characterized in that the reciprocating furnace Row is in be obliquely installed with horizontal plane.

4. the mixed combustion high moisture fuel burner hearth of gas-solid according to claim 1, which is characterized in that further include having biomass Gasification generator, the gasification of biomass generator connect the burner.

5. the mixed combustion high moisture fuel burner hearth of gas-solid according to claim 1, which is characterized in that the furnace body is by burner hearth Face arch, burner hearth rear arch, preceding wall, back wall and both sides wall composition, the burner hearth face arch and burner hearth rear arch are by refractory concrete Soil and thermal insulation concrete composition；The preceding wall, back wall and both sides wall are built by refractory brick, aluminium silicate fiber peacekeeping common brick At.

6. the mixed combustion high moisture fuel burner hearth of gas-solid according to claim 1, which is characterized in that also pacify in the furnace body Equipped with air-drying device.

7. the mixed combustion high moisture fuel burner hearth of gas-solid according to claim 6, which is characterized in that opened up on the furnace body There are inspection door and shoot door.