CN209524498U - A kind of environment-friendly biomass solid fuel bifurcation burning boiler - Google Patents

Abstract

The utility model discloses a kind of environment-friendly biomass solid fuel bifurcation burning boilers, precombustion chamber is fixed on the bottom of boiler furnace, the junction of precombustion chamber and boiler furnace is equipped with necking section, Secondary Air jet pipe is evenly equipped in necking section, Secondary Air jet pipe is connected with the Secondary Air header for being fixed on precombustion chamber top outer, the bottom of precombustion chamber is fixed with air compartment, precombustion chamber and air compartment are separated by air distribution plate, the top of air distribution plate is fixed with blast cap, air compartment is communicated with the inner cavity of precombustion chamber by blast cap, the rear portion of boiler furnace is connected with back-end ductwork, level-one air preheater is sequentially installed in back-end ductwork from top to bottom, economizer, second level air preheater, the outlet of level-one air preheater is connected by pipeline with Secondary Air header, the outlet of second level air preheater is connected by pipeline with air compartment, the utility model has stability good, clean and environmental protection Advantage can adapt to the use of high-moisture biomass material.

Description

A kind of environment-friendly biomass solid fuel bifurcation burning boiler

Technical field

The utility model belongs to biomass clean and utilizes technical field, and in particular to a kind of environment-friendly biomass solid fuel Bifurcation burning boiler.

Background technique

Industrial Boiler, the kiln of current fire coal pollute larger, welding, have caused a series of society and have asked Topic.Country, which calls, reduces pollution, reduces discharge, reduces and burns coal, advocates to fire the low pollution fuels such as vapour, biomass substitution coal.It is raw Sulfur-bearing is lower in substance, and discharge and pollution are few, and cost is relatively low.

Biomass mainly using directly burning, i.e., is direct plungeed into coal-burning boiler and is arranged in chain by present biomass combustion mode Upper burning, substitution are coal-fired.For boiler when burning high-moisture biomass material, the ignition temperature above fire grate is lower, boiler exhaust gas Middle CO content is high, and ash content carbon is high, and due to burning tissues difficulty, discharged nitrous oxides concentration is high in boiler exhaust gas.

Utility model content

The purpose of the utility model is to overcome above-mentioned the deficiencies in the prior art, provide a kind of environment-friendly biomass solid combustion Expect bifurcation burning boiler.

A kind of environment-friendly biomass solid fuel bifurcation burning boiler, including precombustion chamber, boiler furnace, blast cap, it is described pre- Combustion room is fixed on the bottom of boiler furnace, and the junction of the precombustion chamber and boiler furnace is equipped with necking section, uniformly distributed in necking section There is Secondary Air jet pipe, the Secondary Air jet pipe is connected with the Secondary Air header for being fixed on precombustion chamber top outer, the pre-burning The bottom of room is fixed with air compartment, and the precombustion chamber and air compartment are separated by air distribution plate, and the top of the air distribution plate is fixed with blast cap, The air compartment is communicated with the inner cavity of precombustion chamber by blast cap, and the rear portion of the boiler furnace is connected with back-end ductwork, the tail Level-one air preheater, economizer, second level air preheater are sequentially installed in portion's flue from top to bottom, the outlet of the level-one air preheater is logical Piping is connected with Secondary Air header, and the outlet of the second level air preheater is connected by pipeline with air compartment.

Preferably, the import of the level-one air preheater is connected with the outlet of secondary air fan by pipeline.

Preferably, the import of the second level air preheater is connected with the outlet of primary air fan.

Preferably, material feeding tube, bed material feed pipe are fixed on the side wall of the precombustion chamber lower part.

Preferably, scum pipe is fixed at the center of the air distribution plate, the lower end of the scum pipe is pierced by from air compartment, described The upper end of scum pipe is communicated with precombustion chamber.

Compared with prior art, the utility model has the beneficial effects that

When the utility model is used, biomass material feeds precombustion chamber from material feeding tube by screw conveyor, in advance First air after heat sprays into precombustion chamber from blast cap, and First air reacts in precombustion chamber with biomass material generating unit divided combustion, raw It producing combustion gas and coke, combustion gas carries powdered coke and enter boiler furnace, the Secondary Air after preheating is sprayed from Secondary Air jet pipe, For realizing the completely burned of combustion gas and coke.Precombustion chamber is heat insulating construction, by the way that precombustion chamber, while First air and secondary is arranged Wind is hot-air, so that boiler can adapt to the use of high-moisture biomass material；It will be difficult to carry out by the way that precombustion chamber is arranged The biomass solid fuel of burning tissues is converted to combustion gas and the coke powder of high temperature, to be conducive to the tissue of burning, it is ensured that The stability of burning can be realized thoroughly burning for combustible, while can control the discharge of nitrogen oxides.

Detailed description of the invention

In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor Under, it is also possible to obtain other drawings based on these drawings.

Fig. 1 is a kind of structural schematic diagram of environment-friendly biomass solid fuel bifurcation burning boiler of the utility model.

Fig. 2 is the partial enlargement diagram in Fig. 1 at A.

Fig. 3 is the partial enlargement diagram in Fig. 1 at B.

In figure, 1, boiler furnace, 2, Secondary Air jet pipe, 3, Secondary Air header, 4, precombustion chamber, 5, material feeding tube, 6, wind Cap, 7, air distribution plate, 8, air compartment, 9, scum pipe, 10, level-one air preheater, 11, secondary air fan, 12, economizer, 13, second level it is empty pre- Device, 14, primary air fan, 15, bed material feed pipe, 16, back-end ductwork.

Specific embodiment

It is practical new below in conjunction with this to keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that is retouched The embodiment stated is the utility model a part of the embodiment, instead of all the embodiments.Based on the implementation in the utility model Example, every other embodiment obtained by those of ordinary skill in the art without making creative efforts belong to The range of the utility model protection.

Referring to Fig. 1, Fig. 2, Fig. 3, a kind of environment-friendly biomass solid fuel bifurcation burning boiler, including precombustion chamber 4, boiler Burner hearth 1, blast cap 6, the precombustion chamber 4 are fixed on the bottom of boiler furnace 1, and the precombustion chamber 4 and the junction of boiler furnace 1 are set Have necking section, be evenly equipped with Secondary Air jet pipe 2 in necking section, the Secondary Air jet pipe 2 be fixed on the two of 4 top outer of precombustion chamber Secondary wind header 3 is connected, and the bottom of the precombustion chamber 4 is fixed with air compartment 8, the precombustion chamber 4 and air compartment 8 by air distribution plate 7 every It opens, the top of the air distribution plate 7 is fixed with blast cap 6, and the air compartment 8 is communicated with the inner cavity of precombustion chamber 4 by blast cap 6, the pot The rear portion of furnace burner hearth 1 is connected with back-end ductwork 16, is sequentially installed with level-one air preheater from top to bottom in the back-end ductwork 16 10, the outlet of economizer 12, second level air preheater 13, the level-one air preheater 10 is connected by pipeline with Secondary Air header 3, institute The outlet for stating second level air preheater 13 is connected by pipeline with air compartment 8, the import of the level-one air preheater 10 and secondary air fan 11 Outlet be connected by pipeline, the import of the second level air preheater 13 is connected with the outlet of primary air fan 14, the pre-burning It is fixed with material feeding tube 5, bed material feed pipe 15 on the side wall of 4 lower part of room, is fixed with scum pipe at the center of the air distribution plate 7 9, the lower end of the scum pipe 9 is pierced by from air compartment 8, and the upper end of the scum pipe 9 is communicated with precombustion chamber 4.

The working principle of the utility model is:

When the utility model is used, biomass material feeds precombustion chamber 4 from material feeding tube 5 by screw conveyor, First air after preheating sprays into precombustion chamber 4 from blast cap 6, and First air is anti-with biomass material generating unit divided combustion in precombustion chamber 4 It answers, produces combustion gas and coke, combustion gas carry powdered coke and enter boiler furnace 1, the Secondary Air after preheating is sprayed from Secondary Air Pipe 2 sprays, for realizing the completely burned of combustion gas and coke.Precombustion chamber 4 is heat insulating construction, by the way that precombustion chamber 4, while one is arranged Secondary wind and Secondary Air are hot-air, so that boiler can adapt to the use of high-moisture biomass material；By the way that precombustion chamber 4 is arranged The biomass solid fuel for being difficult to carry out burning tissues is converted into combustion gas and the coke powder of high temperature, to be conducive to burning Tissue, it is ensured that the stability of burning can be realized thoroughly burning for combustible, while can control the discharge of nitrogen oxides.

It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment Intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that There is also other identical elements in process, method, article or equipment including the element.

Above embodiments are only to illustrate the technical solution of the utility model, rather than its limitations；Although referring to aforementioned reality Example is applied the utility model is described in detail, those skilled in the art should understand that: it still can be to preceding Technical solution documented by each embodiment is stated to modify or equivalent replacement of some of the technical features；And these It modifies or replaces, the spirit and model of various embodiments of the utility model technical solution that it does not separate the essence of the corresponding technical solution It encloses.

Claims (5)

1. a kind of environment-friendly biomass solid fuel bifurcation burning boiler, including precombustion chamber (4), boiler furnace (1), blast cap (6), It is characterized by: the precombustion chamber (4) is fixed on the bottom of boiler furnace (1), the precombustion chamber (4) and boiler furnace (1) Junction is equipped with necking section, is evenly equipped with Secondary Air jet pipe (2) in necking section, the Secondary Air jet pipe (2) and is fixed on precombustion chamber (4) the Secondary Air header (3) of top outer is connected, and the bottom of the precombustion chamber (4) is fixed with air compartment (8), the precombustion chamber (4) separated with air compartment (8) by air distribution plate (7), the top of the air distribution plate (7) is fixed with blast cap (6), the air compartment (8) with The inner cavity of precombustion chamber (4) is communicated by blast cap (6), and the rear portion of the boiler furnace (1) is connected with back-end ductwork (16), described It is sequentially installed with level-one air preheater (10), economizer (12), second level air preheater (13) from top to bottom in back-end ductwork (16), it is described The outlet of level-one air preheater (10) is connected by pipeline with Secondary Air header (3), and the outlet of the second level air preheater (13) is logical Piping is connected with air compartment (8).

2. a kind of environment-friendly biomass solid fuel bifurcation burning boiler as described in claim 1, it is characterised in that: described one The import of grade air preheater (10) is connected with the outlet of secondary air fan (11) by pipeline.

3. a kind of environment-friendly biomass solid fuel bifurcation burning boiler as described in claim 1, it is characterised in that: described two The import of grade air preheater (13) is connected with the outlet of primary air fan (14).

4. a kind of environment-friendly biomass solid fuel bifurcation burning boiler as described in claim 1, it is characterised in that: described pre- It fires and is fixed with material feeding tube (5), bed material feed pipe (15) on the side wall of room (4) lower part.

5. a kind of environment-friendly biomass solid fuel bifurcation burning boiler as described in claim 1, it is characterised in that: the cloth It is fixed at the center of aerofoil (7) scum pipe (9), the lower end of the scum pipe (9) is pierced by from air compartment (8), the scum pipe (9) Upper end communicated with precombustion chamber (4).