CN209944737U - Composite combustion fluidized bed type double-hearth - Google Patents

Composite combustion fluidized bed type double-hearth Download PDF

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CN209944737U
CN209944737U CN201920290309.7U CN201920290309U CN209944737U CN 209944737 U CN209944737 U CN 209944737U CN 201920290309 U CN201920290309 U CN 201920290309U CN 209944737 U CN209944737 U CN 209944737U
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water
side water
cooling
wall
cooling wall
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CN201920290309.7U
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孙宇健
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HARBIN SIFANG BOILER Co Ltd
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HARBIN SIFANG BOILER Co Ltd
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Abstract

The utility model discloses a composite combustion fluidized bed type double-hearth, which comprises a boiler hearth part and a combustion system part. The boiler furnace is provided with a double-furnace structure, the double-furnace structure comprises a furnace I and a furnace II, and the furnace I is formed by a space surrounded by the upper part of a front side water-cooling wall, a water-cooling air chamber membrane wall, a sealing plate, the upper part of a side water-cooling wall and the upper part of a rear side water-cooling wall; the hearth II is formed by a space surrounded by a front side water cooling wall, a rear side water cooling wall and a side water cooling wall; the biomass fuel drying device has the characteristics of high supporting strength, stable structure, energy conservation, environmental protection and the like, and can dry the biomass fuel in a hearth, realize that the fuel can be directly bundled and fully combusted, and reduce the emission of nitrogen oxides.

Description

Composite combustion fluidized bed type double-hearth
Technical Field
The utility model relates to a boiler technical field especially can satisfy national boiler atmospheric pollutants emission standard's emission requirement, and it is high to solve the moisture that the living beings were beaten after the bundle, and the calorific value is low, can not the direct combustion, and the burning is insufficient, and the slagging scorification is serious, and nitrogen oxide emission concentration is high, a compound combustion fluidized bed type double furnace chamber of polluted environment.
Background
It is well known that as society's demand for energy increases, fossil fuels, which are the main source of energy, are rapidly decreasing. Therefore, the search for a renewable alternative energy source becomes a focus of general social attention. The biomass energy is important renewable energy and has the characteristics of greenness, low carbon, cleanness, renewability and the like. Accelerating the development and utilization of biomass energy becomes important. However, the existing biomass fuel has the defects of high water content, low heat value, incapability of directly bundling and burning, and burning only after drying moisture, so that the use cost is increased, the burning is insufficient, the emission concentration of nitrogen oxides is high, the slagging is serious, and the thermal efficiency of a boiler is low. Therefore, the problem that how to dry the biomass fuel in the furnace so that the biomass fuel can be directly bundled and fully combusted, reduce the emission of nitrogen oxides, solve the problem of slagging and improve the thermal efficiency of the boiler is the urgent need to be solved at present.
Disclosure of Invention
The utility model aims at: the composite combustion fluidized bed type double-hearth has the advantages that the problems existing in the prior art are corrected, the defects in the prior art are overcome, the composite combustion fluidized bed type double-hearth is provided, the high-strength support and the structure are safe and stable, biomass fuel can be dried in the hearth, further, the fuel can be directly bundled and fully combusted, the emission of nitrogen oxides is reduced, and therefore the thermal efficiency of a boiler is improved.
In order to achieve the above object, the utility model provides a following scheme:
the utility model provides a composite combustion fluidized bed type double-hearth, which comprises a boiler hearth part and a combustion system part. The boiler furnace is provided with a double-furnace structure, the furnace structure comprises a front side water-cooling wall, a front and rear side water-cooling wall upper header, a front side water-cooling wall lower header, a rear side water-cooling wall lower header, a side water-cooling wall upper header, a side water-cooling wall lower header and a water-cooling air chamber, and the water-cooling wall is communicated with the header.
Optionally, the double-hearth structure comprises a hearth I and a hearth II, wherein the hearth I is formed by a space surrounded by the upper part of the front side water-cooling wall, the membrane wall of the water-cooling plenum, the sealing plate, the upper part of the side water-cooling wall and the upper part of the rear side water-cooling wall; the hearth II is formed by a space surrounded by the whole front side water cooling wall, the whole rear side water cooling wall and the whole side water cooling wall; the upper end of the front side water-cooling wall is connected with the front and rear side water-cooling wall upper header, the lower end of the front side water-cooling wall is connected with the front side water-cooling wall lower header, the upper end of the side water-cooling wall is connected with the side water-cooling wall upper header, the lower end of the side water-cooling wall is connected with the side water-cooling wall lower header, the upper end of the water-cooling chamber membrane wall is connected with the water-cooling chamber upper header, and the lower end of the water-cooling chamber membrane wall is connected with the water-cooling chamber lower header; the upper end of the rear side water-cooling wall is connected with the upper header of the front side water-cooling wall and the lower header of the rear side water-cooling wall, and a flue gas outlet is formed above the rear side water-cooling wall.
Optionally, the biomass combustion chamber is designed to be a U-shaped structure, and is formed by a space surrounded by a staggered lean-drawing pipe structure bent at the lower part of a front side water-cooling wall with an inward convex lower part, a staggered lean-drawing pipe structure bent at the upper part of a water-cooling air chamber membrane wall, and a sealing plate, wherein the lean-drawing pipe at the lower part of the front side water-cooling wall can enable flame at the lower part of the furnace chamber ii to directly heat biomass fuel in the biomass combustion chamber to enable the biomass fuel to play a role in dry combustion, and further the problems that the biomass fuel cannot be directly bundled and combusted and cannot be sufficiently combusted are solved.
Optionally, the water-cooling air chamber is designed to be a U-shaped structure, and is formed by a space enclosed by a lower water-cooling air chamber collection box, an upper water-cooling air chamber collection box, a water-cooling air chamber membrane wall and an air cap, the upper part of the U-shaped water-cooling air chamber membrane wall is bent to form staggered dilution pipe structures, one part of the U-shaped water-cooling air chamber membrane wall plays a supporting role, and the air cap is fully distributed on the other part of the water-cooling air chamber membrane wall to play an air supply role.
Optionally, the fuel burnt by the hearth I is a bundling material, a crushing material and a particle material. The fuel burned in the hearth II is biomass particles, crushed materials and coal.
Optionally, the combustion mode of the hearth II is a fluidized bed mode.
The utility model discloses for prior art gain following technological effect: the design of the double-hearth and the water-cooling air chamber makes the biomass fuel which cannot be directly bundled and combusted originally become possible, the biomass fuel can be fully combusted, the emission of nitrogen oxides is reduced, the heat efficiency of the boiler is improved, and the structure is simple.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a front view of the embodiment of the composite combustion fluidized bed type double-hearth of the present invention.
In the figure: 1 side water-cooled wall upper header, 2 front and back side water-cooled wall upper headers, 3 sealing plates, 4 biomass combustion chambers, 5 water-cooled air chamber upper header, 6 air inlets, 7 air caps, 8 water-cooled air chamber lower header, 9 water-cooled air chambers, 10 water-cooled air chamber membrane walls, 11 flue gas outlets, 12 front side water-cooled walls, 13 hearth I, 14 back side water-cooled walls, 15 side water-cooled walls, 16 hearth II, 17 fluidized bed water-cooled air chambers, 18 front side water-cooled wall lower headers, 19 back side water-cooled wall lower headers, and 20 side water-cooled wall lower headers.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
The utility model aims at: the composite combustion fluidized bed type double-hearth has the advantages that the problems existing in the prior art are corrected, the defects in the prior art are overcome, the composite combustion fluidized bed type double-hearth is provided, the high-strength support and the structure are safe and stable, biomass fuel can be dried in the hearth, further, the fuel can be directly bundled and fully combusted, the emission of nitrogen oxides is reduced, and therefore the thermal efficiency of a boiler is improved.
In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.
Examples
The utility model provides a composite combustion fluidized bed type double-hearth, as shown in figure 1, comprising a boiler hearth part and a combustion system part. The boiler furnace part comprises a side water-cooled wall upper collection box 1, front and rear side water-cooled wall upper collection boxes 2, a sealing plate 3, a biomass combustion chamber 4, a water-cooled chamber upper collection box 5, an air inlet 6, an air cap 7, a water-cooled chamber lower collection box 8, a water-cooled chamber 9, a water-cooled chamber membrane wall 10, a flue gas outlet 11, a front side water-cooled wall 12, a furnace I13, a rear side water-cooled wall 14, a side water-cooled wall 15, a furnace II 16, a fluidized bed water-cooled chamber 17, a front side water-cooled wall lower collection box 18, a rear side water-cooled wall lower collection box 19 and a side water-cooled wall lower collection box 20.
Specifically, the furnace I13 is composed of a space enclosed by the upper part of a front side water-cooling wall 12, a water-cooling wind chamber membrane wall 10, a sealing plate 3, the upper part of a side water-cooling wall 15 and the upper part of a rear side water-cooling wall 14.
The hearth II is formed by a space surrounded by a front side water-cooled wall 12, a front and rear side water-cooled wall upper header 2, a front side water-cooled wall lower header 18, a rear side water-cooled wall 14, a rear side water-cooled wall lower header 19, a side water-cooled wall 15, a side water-cooled wall upper header 1 and a side water-cooled wall lower header 20.
The biomass combustion chamber 4 is composed of a space enclosed by a bent lower part of the front water-cooling wall 12, a bent upper part of the water-cooling wind chamber membrane wall 10, and a sealing plate 3 and a lower part of the side water-cooling wall 15.
The utility model discloses a working process and principle do: firstly, biomass particles, crushed materials and coal fall on a grate under the action of gravity, the biomass particles, the crushed materials and the coal are fed into a fluidized bed in a hearth II 16 to be combusted under the action of mechanical power, generated heat is absorbed by a front side water-cooling wall 12, a rear side water-cooling wall 14 and a side water-cooling wall 15 of the hearth, the generated heat and high-temperature flame bundle biomass fuel, directly crushed biomass fuel, granular materials and the like in a biomass combustion chamber 4 through a diluent pipe bent at the lower part of the front side water-cooling wall 12, are dried to be combusted, the generated heat is also absorbed by the front side water-cooling wall 12, the rear side water-cooling wall 14 and the side water-cooling wall 15, and cooled flue gas is discharged from a flue gas outlet to finish the working process of boiler flue gas combustion. It is important to point out that this technique double furnace structure and water-cooling wind room structure, the former mainly comprises furnace I13 and furnace II 16, and furnace I13 mainly relies on the high temperature heat and the flame that the fuel burning produced in furnace II 16 to dry the biomass fuel of bundling in biomass combustion chamber 4 and heat and make its burning, has solved the biomass fuel of direct bundling and can not burn and the insufficient problem of burning. The water-cooling air chamber 9 is designed into a U shape, the upper part of the membrane wall of the U-shaped water-cooling air chamber is bent into a staggered dilution pipe structure, one part of the membrane wall of the U-shaped water-cooling air chamber plays a role in supporting, and the membrane wall of the other part of the water-cooling air chamber is fully distributed with air caps to play a role in supplying air.
The utility model discloses a concrete example is applied to explain the principle and the implementation mode of the utility model, and the explanation of the above example is only used to help understand the method and the core idea of the utility model; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the concrete implementation and the application scope. In summary, the content of the present specification should not be construed as a limitation of the present invention.

Claims (6)

1. The utility model provides a compound combustion fluidized bed type double-hearth which characterized in that: comprises a boiler furnace part and a combustion system part; the boiler furnace is provided with a double-furnace structure, the furnace structure comprises a front side water-cooling wall, a front side water-cooling wall upper collection box, a front side water-cooling wall lower collection box, a rear side water-cooling wall lower collection box, a side water-cooling wall upper collection box, a side water-cooling wall lower collection box and a water-cooling air chamber, and the water-cooling air chamber is formed by a space surrounded by the water-cooling air chamber lower collection box, the water-cooling air chamber upper collection box, a water-cooling air chamber membrane wall and a hood; the water-cooled wall is communicated with the header.
2. The composite-combustion fluidized-bed-type double furnace according to claim 1, characterized in that: the double-hearth structure comprises a hearth I and a hearth II, wherein the hearth I is formed by a space surrounded by the upper part of a front side water-cooling wall, a water-cooling air chamber membrane wall, a sealing plate, the upper part of a side water-cooling wall and the upper part of a rear side water-cooling wall; the hearth II is formed by a space surrounded by the whole front side water cooling wall, the whole rear side water cooling wall and the whole side water cooling wall; the upper end of the front side water-cooling wall is connected with the front and rear side water-cooling wall upper header, the lower end of the front side water-cooling wall is connected with the front side water-cooling wall lower header, the upper end of the side water-cooling wall is connected with the side water-cooling wall upper header, the lower end of the side water-cooling wall is connected with the side water-cooling wall lower header, the upper end of the water-cooling chamber membrane wall is connected with the water-cooling chamber upper header, and the lower end of the water-cooling chamber membrane wall is connected with the water-cooling chamber lower header; the space enclosed by the bent lower part of the front water-cooling wall, the bent upper part of the water-cooling air chamber membrane wall, the sealing plate and the lower part of the side water-cooling wall forms a biomass combustion chamber; the upper end of the rear side water-cooling wall is connected with the upper header of the front side water-cooling wall and the lower header of the rear side water-cooling wall, and a flue gas outlet is formed above the rear side water-cooling wall.
3. The composite-combustion fluidized-bed-type double furnace according to claim 2, characterized in that: the biomass combustion chamber is designed to be of a U-shaped structure and is formed by a staggered thin-film drawing pipe structure formed by bending the lower part of a front side water-cooling wall with an inward convex lower part, a staggered thin-film drawing pipe structure formed by bending the upper part of a water-cooling air chamber membrane wall and a space enclosed by a sealing plate, wherein the thin-film drawing pipe at the lower part of the front side water-cooling wall can enable flame at the lower part of a hearth II to directly heat biomass fuel in the biomass combustion chamber to enable the biomass fuel to play a role in dry combustion, and further the problems that the biomass fuel cannot be directly bundled and combusted and cannot be fully combusted.
4. The composite-combustion fluidized-bed-type double furnace according to claim 3, characterized in that: the water-cooling air chamber is designed into a U-shaped structure and is formed by a space enclosed by a lower water-cooling air chamber collection box, an upper water-cooling air chamber collection box, a water-cooling air chamber membrane wall and an air cap, the upper part of the U-shaped water-cooling air chamber membrane wall is bent into a staggered dilution pipe structure, one part of the U-shaped water-cooling air chamber membrane wall plays a supporting role, and the air cap is fully distributed on the other part of the water-cooling air chamber membrane wall to play a role in air supply.
5. The composite-combustion fluidized-bed-type double furnace according to claim 4, characterized in that: the fuel burnt in the hearth I is a bundling material, a crushing material and a particle material; the fuel burned in the hearth II is biomass particles, crushed materials and coal.
6. The composite-combustion fluidized-bed-type double furnace according to claim 5, characterized in that: and the combustion mode of the hearth II is a fluidized bed mode.
CN201920290309.7U 2019-03-08 2019-03-08 Composite combustion fluidized bed type double-hearth Active CN209944737U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109737596A (en) * 2019-03-08 2019-05-10 哈尔滨四方锅炉有限公司 A kind of compound combustion fluidized bed type twin furnace
CN109737596B (en) * 2019-03-08 2024-05-31 哈尔滨四方锅炉有限公司 Composite combustion fluidized bed type double-hearth

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109737596A (en) * 2019-03-08 2019-05-10 哈尔滨四方锅炉有限公司 A kind of compound combustion fluidized bed type twin furnace
CN109737596B (en) * 2019-03-08 2024-05-31 哈尔滨四方锅炉有限公司 Composite combustion fluidized bed type double-hearth

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