CN211233361U - Layer combustion type composite combustion double-hearth - Google Patents

Layer combustion type composite combustion double-hearth Download PDF

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Publication number
CN211233361U
CN211233361U CN201920290310.XU CN201920290310U CN211233361U CN 211233361 U CN211233361 U CN 211233361U CN 201920290310 U CN201920290310 U CN 201920290310U CN 211233361 U CN211233361 U CN 211233361U
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water
cooled
cooled wall
wall
furnace
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CN201920290310.XU
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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 layer combustion formula composite combustion double-hearth, including boiler furnace part, 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 defined by the upper part of a front arch water-cooled wall, a water-cooled air chamber membrane wall, a sealing plate, the upper part of a side water-cooled wall and the upper part of a rear arch water-cooled wall; the hearth II is formed by a space surrounded by the whole front arch water-cooled wall, the rear arch water-cooled wall and the side water-cooled 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

Layer combustion type composite combustion 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 biomass fuel and beat the moisture 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, polluted environment's a double furnace of laminar combustion formula composite combustion.
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, insufficient burning due to the fact that the water can be burnt only after being dried, increased use cost, high emission concentration of nitrogen oxides, serious slag bonding and low boiler heat efficiency. 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 utility model provides a two furnace of layer combustion formula composite combustion are provided to the ubiquitous problem of prior art improves, overcomes prior art not enough and defect, makes biomass fuel dry in furnace, and then realizes that fuel can directly beat the bundle abundant burning, reduces nitrogen oxide and discharges to improve boiler thermal efficiency.
In order to achieve the above object, the utility model provides a following scheme:
the utility model provides a layer combustion type composite combustion 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 arch water-cooled wall, a front and rear arch water-cooled wall upper collection box, a front arch water-cooled wall lower collection box, a rear arch water-cooled wall lower collection box, a side water-cooled wall upper collection box and a side water-cooled wall lower collection box, and the water-cooled walls are communicated with the collection boxes.
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 a front arch water-cooled wall, a water-cooled plenum membrane wall, a sealing plate, the upper part of a side water-cooled wall and the upper part of a rear arch water-cooled wall; the hearth II is formed by a space surrounded by the whole front arch water-cooled wall, the rear arch water-cooled wall and the side water-cooled wall; the upper end of the front arch water-cooled wall is connected with the front and rear arch water-cooled wall upper header, the lower end of the front arch water-cooled wall is connected with the front arch lower header, the upper end of the side water-cooled wall is connected with the side water-cooled wall upper header, the lower end of the side water-cooled wall is connected with the side water-cooled wall lower header, the upper end of the water-cooled chamber membrane wall is connected with the water-cooled chamber upper header, and the lower end of the water-cooled chamber membrane wall is connected with the water-cooled chamber lower header; the upper end of the rear arch water-cooled wall is connected with the front and rear arch water-cooled wall upper header, the lower end of the rear arch water-cooled wall is connected with the rear arch water-cooled wall lower header, and a flue gas outlet is formed above the rear arch water-cooled 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 tube structure bent at the lower part of a front arch water-cooling wall with an inward convex lower part, a staggered lean-drawing tube structure bent at the upper part of a water-cooling plenum membrane wall, and a sealing plate, wherein the lean-drawing tube at the lower part of the front arch water-cooling wall can enable flame at the lower part of the hearth to directly heat the biomass fuel in the biomass combustion chamber to achieve the effect of dry combustion, and further the problems that the biomass fuel cannot be directly bundled and combusted and cannot be fully 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 portion of the U-shaped water-cooling air chamber membrane wall is bent to form staggered dilution pipe structures, one portion of the U-shaped water-cooling air chamber membrane wall plays a supporting role, and the air cap is fully distributed on the other portion of the water-cooling air chamber membrane wall to play an air supply role.
Optionally, the sealing plate is designed to be arranged in two rows, one of which is opened and the other is closed, so that a tight sealing effect is achieved.
Optionally, the side wall lower header is horizontal and inclined, and the grate is a traveling grate, a reciprocating grate or a reciprocating traveling grate.
Optionally, 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.
The utility model discloses for prior art gain following technological effect: the design of two furnace and water-cooling plenum makes originally can not directly bundle the biomass fuel of burning and become possible, but also can fully burn, reduces nitrogen oxide and discharges to improve boiler thermal efficiency, simple structure.
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 some 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 a structure of an embodiment of a layer combustion type composite combustion double-hearth of the present invention.
FIG. 2 is a front view of the second embodiment of the layered combustion type composite combustion double-hearth boiler barrel replacing the front and rear arch upper header of the present invention.
FIG. 3 is a front view of the third embodiment of the grate with reciprocating grate in the lower part of the dual-chamber of the layered combustion type composite combustion of the present invention.
FIG. 4 is a front view of the embodiment of the grate with reciprocating chain for the grate in the lower part of the dual-chamber of the layer combustion type combined combustion of the present invention.
In the figure: 1 side water-cooled wall upper header, 2 front and rear arch water-cooled wall upper headers, 3 sealing plates, 4 biomass combustion chambers, 5 water-cooled air chamber upper headers, 6 air inlets, 7 air caps, 8 water-cooled air chamber lower headers, 9 water-cooled air chambers, 10 water-cooled air chamber membrane walls, 11 flue gas outlets, 12 front arch water-cooled walls, 13 hearth I, 14 rear arch water-cooled walls, 15 side water-cooled walls, 16 front arch water-cooled wall lower headers, 17 hearth II, 18 side water-cooled wall lower headers, 19 rear arch water-cooled wall lower headers and 20 chain grates.
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 utility model provides a two furnace of layer combustion formula combined combustion to solve the problem that above-mentioned prior art exists, make biomass fuel can be dry in furnace, and then realize that fuel can directly beat bundle abundant burning, reduce nitrogen oxide and discharge, thereby improve boiler thermal efficiency.
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.
Example one
The utility model provides a layer combustion type composite combustion 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 header 1, a front and rear arch water-cooled wall upper header 2, a sealing plate 3, a biomass combustion chamber 4, a water-cooled air chamber upper header 5, an air inlet 6, an air cap 7, a water-cooled air chamber lower header 8, a water-cooled air chamber 9, a water-cooled air chamber membrane wall 10, a flue gas outlet 11, a front arch water-cooled wall 12, a furnace I13, a rear arch water-cooled wall 14, a side water-cooled wall 15, a front arch water-cooled wall lower header 16, a furnace II 17, a side water-cooled wall lower header 18, a rear arch water-cooled wall lower header 19 and a chain grate 20. The fire grate part is arranged at the bottom of the boiler furnace part and is fixedly connected with the boiler furnace body part.
Specifically, the hearth I13 is formed by a space enclosed by the upper part of a front arch water-cooled wall 12, a water-cooled air chamber membrane wall 10, a sealing plate 3, the upper part of a side water-cooled wall 15 and the upper part of a rear arch water-cooled wall 14.
Specifically, the furnace II 17 is formed by a space surrounded by a front arch water-cooled wall 12, a front and rear arch water-cooled wall upper header 2, a front arch water-cooled wall lower header 16, a rear arch water-cooled wall 14, a rear arch 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 18.
A biomass combustion chamber 4 is formed by a space enclosed by the bent lower part of a front arch water-cooling wall 12 of a boiler hearth part, the bent upper part of a water-cooling air chamber membrane wall 10 and the lower parts of a sealing plate 3 and a side water-cooling wall 15.
A water-cooling air chamber 9 is formed by a space enclosed by a water-cooling air chamber lower header 8, a water-cooling air chamber upper header 5, a water-cooling air chamber membrane wall 10 and a hood 7 at the hearth part of the boiler.
Example two
The present embodiment is a further improvement on the basis of the first embodiment, and includes all the technical features of the first embodiment, as shown in fig. 2, a drum is added to the upper right portion of the boiler body to replace the front and rear arch water wall header 2.
EXAMPLE III
The present embodiment is a further improvement made on the basis of the first embodiment, and includes all the technical features of the first embodiment, as shown in fig. 3, the lower grate is a reciprocating grate.
Example four
The present embodiment is further improved on the basis of the first embodiment, and includes all the technical features of the first embodiment, as shown in fig. 4, the lower grate is a reciprocating traveling grate.
The utility model discloses a working process and principle do: firstly, biomass particles, crushed materials and coal fall on a fire grate under the action of gravity and are sent into a hearth II 17 to be combusted under the action of mechanical power, wherein the generated heat is absorbed by a front arch water-cooled wall 12, a rear arch water-cooled wall 14 and a side water-cooled wall 15 of the hearth, meanwhile, the generated heat and high-temperature flame bundle biomass fuel, directly crushed biomass fuel, particles and the like in a biomass combustion chamber 4 through a diluent pipe bent at the lower part of the front arch water-cooled wall 12, and are dried and combusted, the generated heat is also absorbed by the front arch water-cooled wall 12, the rear arch water-cooled wall 14 and the side water-cooled wall 15, and the cooled flue gas is discharged from a flue gas outlet 11 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 17, and furnace I13 mainly relies on the high temperature heat and the flame that the fuel burning produced in furnace II 17 to make the biomass fuel of bundling dry the heating in biomass combustion chamber 4 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 technology can be widely applied to the grate firing boiler.
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 (3)

1. A layer combustion type composite combustion double-hearth is characterized in that: comprises a boiler furnace part and a biomass combustion chamber;
the boiler furnace is provided with a double-furnace structure, the outer wall of the double-furnace structure consists of a front arch water-cooled wall, a front arch water-cooled wall upper collection box, a rear arch water-cooled wall lower collection box, a side water-cooled wall upper collection box and a side water-cooled wall lower collection box which are sequentially connected, the inside of the double-furnace structure comprises a furnace I and a furnace II, and the furnace I consists of a space defined by the upper part of the front arch water-cooled wall, a water-cooled chamber membrane wall, a sealing plate, the upper part of the side water-cooled wall and the upper part of the rear arch water-cooled; the hearth II is formed by a space surrounded by the whole front arch water-cooled wall, the rear arch water-cooled wall and the side water-cooled wall;
the bottom of the boiler furnace part is provided with a grate fixedly connected with the boiler furnace body part, and the grate is in the form of a chain grate, a reciprocating grate and a reciprocating chain grate;
the upper end of the front arch water-cooled wall is connected with the front and rear arch water-cooled wall upper header, the lower end of the front arch water-cooled wall is connected with the front arch lower header, the upper end of the side water-cooled wall is connected with the side water-cooled wall upper header, the lower end of the side water-cooled wall is connected with the side water-cooled wall lower header, the upper end of the water-cooled chamber membrane wall is connected with the water-cooled chamber upper header, and the lower end of the water-cooled chamber membrane wall is connected with the water-cooled chamber lower header; the upper end of the rear arch water-cooled wall is connected with the front and rear arch water-cooled wall upper header, the lower end of the rear arch water-cooled wall is connected with the rear arch water-cooled wall lower header, and a flue gas outlet is formed above the rear arch water-cooled wall;
the lower collection box of the water-cooling air chamber, the upper collection box of the water-cooling air chamber, the membrane wall of the water-cooling air chamber and the hood enclose a space to form the water-cooling air chamber, the water-cooling air chamber is designed into a U-shaped structure, the upper part of the U-shaped structure is bent into a staggered dilution pipe structure, one part of the U-shaped structure plays a supporting role, and the hood is fully distributed on the membrane wall of the part of the water-cooling air chamber to play a role in air supply;
the biomass combustion chamber is designed to be of a U-shaped structure, and is formed by a space enclosed by a staggered thin-film drawing tube structure bent at the lower part of a front arch water-cooling wall with an inward-convex lower part, a staggered thin-film drawing tube structure bent at the upper part of a water-cooling air chamber membrane wall and a sealing plate, wherein the thin-film drawing tube at the lower part of the front arch water-cooling wall can enable flame at the lower part of a hearth to directly heat biomass fuel in the biomass combustion chamber 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 are solved.
2. The dual-chamber of a layer combustion type composite combustion as claimed in claim 1, wherein: the sealing plate is designed into an upper row and a lower row which are arranged in parallel, wherein one sealing plate is opened and the other sealing plate is closed, so that the sealing plate plays a role in tight sealing.
3. The dual-chamber of a layer combustion type composite combustion as claimed in claim 1, wherein: the fuel burnt in the hearth I is bundling material, crushing material and granular material; the fuel burned in the hearth II is biomass particles, crushed materials and coal.
CN201920290310.XU 2019-03-08 2019-03-08 Layer combustion type composite combustion double-hearth Active CN211233361U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109737597A (en) * 2019-03-08 2019-05-10 哈尔滨四方锅炉有限公司 A kind of grate firing type compound combustion twin furnace

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109737597A (en) * 2019-03-08 2019-05-10 哈尔滨四方锅炉有限公司 A kind of grate firing type compound combustion twin furnace

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