CN209944290U - Double-hearth composite combustion settling chamber corner tube boiler - Google Patents

Double-hearth composite combustion settling chamber corner tube boiler Download PDF

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Publication number
CN209944290U
CN209944290U CN201920290361.2U CN201920290361U CN209944290U CN 209944290 U CN209944290 U CN 209944290U CN 201920290361 U CN201920290361 U CN 201920290361U CN 209944290 U CN209944290 U CN 209944290U
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water
wall
cooled
cooled wall
boiler
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付琳
孙宇健
孙伟东
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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 double-hearth composite combustion settling chamber corner tube boiler, which comprises a boiler body part and a combustion system part. A supporting structure and a double-hearth structure are arranged in the boiler body, and the supporting structure comprises a front side support and a rear side support downcomer which are vertically arranged; the upper end of the front side supporting downcomer is connected with a boiler barrel, the lower end of the front side supporting downcomer is connected with a side water-cooling wall lower header, two ends of the rear side supporting downcomer are respectively connected with a side water-cooling wall upper header and a side water-cooling wall lower header which are horizontally arranged, the boiler barrel is arranged above one side of the boiler body and is connected with a water inlet pipe, and the bottom of the boiler barrel is connected with a downcomer I communicated with the rear side supporting downcomer and a downcomer II connected with a front arch lower header; the double-hearth structure consists of a hearth I and a hearth II; 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

Double-hearth composite combustion settling chamber corner tube boiler
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, polluted environment's a double-furnace composite combustion settling chamber angle pipe boiler.
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 biomass fuel of the existing biomass boiler has high water content and low heat value in the aspects of use of the biomass fuel and boiler structure, but the existing biomass fuel with high water content can not be directly bundled and combusted, and the biomass fuel can be combusted only after the moisture is dried, so that the use cost is increased, the combustion is insufficient, and the slag bonding is serious; without a settling chamber, dust cannot settle, the emission concentration of nitrogen oxides is high, and the thermal efficiency of the boiler is low. Therefore, the boiler provided with the settling chamber and capable of drying the biomass fuel in the boiler simultaneously is provided, so that the biomass fuel can be directly bundled and fully combusted, the emission of nitrogen oxides is reduced, the slagging problem is solved, and the thermal efficiency of the boiler is improved, and the problem which needs to be solved at present is urgently provided.
Disclosure of Invention
The utility model aims at providing a two furnace composite combustion settling chamber angle pipe boilers 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 the bundle abundant combustion, reduce nitrogen oxide and discharge, thereby improve boiler thermal efficiency.
In order to achieve the above object, the utility model provides a following scheme:
the utility model provides a double-hearth composite combustion settling chamber corner tube boiler, which comprises a boiler body part and a combustion system part. A supporting structure and a double-hearth structure are arranged in the boiler body, and the supporting structure comprises a front supporting downcomer and a rear supporting downcomer which are vertically arranged; the utility model discloses a boiler, including boiler body, preceding collateral branch supporting downcomer, boiler body, preceding collateral branch supporting downcomer, lower extreme and side water-cooling wall lower header are connected, collection case and side water-cooling wall lower header are connected on the side water-cooling wall that back collateral branch supporting downcomer both ends were equallyd divide and are connected with the level setting respectively, boiler body one side top is provided with the boiler, be connected with the inlet tube on the boiler body, the boiler bottom be connected with the downcomer I of back collateral branch supporting downcomer intercommunication, II bottoms of downcomer are connected with preceding hunch lower header, boiler body internal top be provided with preceding hunch upper header of lower header intercommunication, preceding hunch upper header with the boiler passes through the wet return intercommunication.
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 a space structure formed by the whole front arch water-cooled wall, the rear arch water-cooled wall and the side water-cooled wall in a surrounding mode; the upper end of the front arch water-cooled wall is connected with the front and rear arch 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 membrane wall upper header, and the lower end of the water-cooled chamber membrane wall is connected with the water-cooled chamber membrane wall lower header; the upper end of the rear arch water-cooled wall is connected with the front and rear arch upper header, the lower end of the rear arch water-cooled wall is connected with the rear arch and the channel rear wall lower header, a channel rear wall water-cooled wall is arranged on the outer side of the rear arch water-cooled wall, the upper end of the channel rear wall water-cooled wall is connected with the channel rear wall upper header, the lower end of the channel rear wall water-cooled wall is connected with the rear arch and the channel rear wall lower header, the outer side of the channel rear wall water-cooled wall is provided with a flag type heating surface water-cooled wall, the top of the flag type heating surface water-cooling wall is connected with a flag type heating surface water-cooling wall upper header, the lower end of the flag type heating surface water-cooling wall is connected with a flag type heating surface water-cooling wall lower header, the bottom of the flag type heating surface water-cooled wall is connected with a water outlet header through a flag type heating surface water-cooled wall lower header, a flue gas circulation port is formed above the rear arch water-cooled wall, and a flue gas outlet is formed above the flag type heating surface 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 plenum membrane wall is designed into a U-shaped structure and is formed by a space enclosed by a water-cooling plenum membrane wall lower collection box, a water-cooling plenum membrane wall upper collection box, a water-cooling plenum membrane wall and an air cap, wherein the upper part of the U-shaped water-cooling plenum membrane wall is bent into a staggered dilution pipe structure, one part of the U-shaped water-cooling plenum membrane wall plays a supporting role, and the air cap is fully distributed on the other part of the water-cooling plenum membrane wall to play a role in supplying air.
Optionally, the boiler barrel is communicated with a water supply pipe, the top of the water supply pipe is communicated with the upper collecting box of the flag type heating surface water-cooled wall, the upper collecting box of the flag type heating surface water-cooled wall is communicated with the lower collecting box of the flag type heating surface water-cooled wall through the flag type heating surface water-cooled wall, and the lower collecting box of the flag type heating surface water-cooled wall is communicated with the water outlet collecting box.
Optionally, the sealing plates are arranged in two parallel rows, wherein one sealing plate is opened and the other sealing plate is closed, so that a tight sealing effect is achieved.
Optionally, the settling chamber comprises an upper settling chamber and a lower settling chamber, and the upper settling chamber is formed by a space surrounded by a rear water-cooled wall, a channel rear wall water-cooled wall and a side water-cooled wall; the lower settling chamber is formed by a space surrounded by a channel rear wall water-cooled wall, a flag type heating surface water-cooled wall and a side water-cooled wall. The structure not only increases the heating area, but also plays a role in settling the smoke dust.
Optionally, a throttle ring is arranged on the rear-side supporting downcomer.
Optionally, the bottom of the collector is provided with symmetrically arranged supports under the side walls.
Optionally, the grate part is designed to adopt a chain grate structure, as shown in fig. 1. It is to be noted here that fig. 1, 2 and 3 show the chain grate structure, and fig. 4 shows the reciprocating grate structure. The present technique is also applicable to other grate configurations.
The utility model discloses for prior art gain following technological effect: the design of double-hearth, water-cooling air chamber and settling chamber makes it possible to make the biomass fuel which can not be directly bundled and burned originally, and also can be fully burned, and the emission of nitrogen oxides is reduced, thereby improving the thermal efficiency of the boiler and having 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 an embodiment of a double-hearth composite combustion settling chamber corner tube boiler of the utility model.
FIG. 2 is a front view of the second structure of the corner tube boiler of the double-hearth composite combustion settling chamber of the utility model.
FIG. 3 is a front view of the three structures of the corner tube boiler of the double-hearth composite combustion settling chamber of the utility model.
FIG. 4 is a front view of the four structures of the corner tube boiler of the double-hearth composite combustion settling chamber of the utility model.
In the figure: 1 boiler body, 2 water inlet pipe, 3 boiler barrel, 4 down pipe I, 5 down pipe II, 6 front side support down pipe, 7 hearth I, 8 side water cooling wall, 9 front arch water cooling wall, 10 sealing plate, 11 biomass combustion chamber, 12 water cooling plenum membrane wall upper header, 13 air inlet, 14 water cooling plenum membrane wall lower header, 15 hood, 16 water cooling plenum, 17 water cooling plenum membrane wall, 18 coal hopper, 19 front arch lower header, 20 water supply pipe, 21 upper return pipe, 22 front and rear arch upper header, 23 channel rear wall upper header, 24 flag type heating surface water cooling wall upper header, 25 side water cooling wall upper header, 26 flue gas outlet, 27 rear side support down pipe, 28 upper settling chamber, 29 rear arch water cooling wall, 30 throttle ring, 31 flag type water cooling surface, 32 channel rear wall water cooling wall, 33 flag type heating surface water cooling wall, 34 lower settling chamber, 35 outlet water cooling tank, 36 flag type heating surface water cooling wall lower header, 37, 38 rear arch and channel rear wall lower header, 39 side water cooling wall lower header, 40 support and 41 traveling grate.
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 providing a two furnace composite combustion settling chamber angle pipe boilers 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 the bundle abundant combustion, 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 two furnace composite combustion settling chamber angle pipe boilers, as shown in figure 1, including boiler furnace body part, combustion system part. The boiler body part comprises a boiler body 1, four front supporting and descending pipes 6 and rear supporting and descending pipes 27 which are vertically arranged around the boiler body 1 and have the functions of supporting and descending, a throttle ring 30, a boiler barrel 3 arranged on the upper part of the boiler body 1, a water inlet pipe 2 communicated with the boiler barrel 3, a water supply pipe 20, a descending pipe I4, a descending pipe II 5 and an upper water return pipe 21, a side water cooling wall upper header 25, a side water cooling wall 8, a side water cooling wall lower header 39, a hearth I7, a hearth II 37, a front and rear arch upper header 22, a front arch water cooling wall 9, a front arch lower header 19, a sealing plate 10, a biomass combustion chamber 11, a water cooling chamber membrane wall upper header 12, an air inlet 13, a water cooling chamber membrane wall lower header 14, an air cap 15, a water cooling chamber 16, a rear water cooling wall 29, a rear arch and passage rear wall lower header 39, a passage rear wall upper header 23 and a passage rear wall water cooling wall 32, the system comprises a flag type heating surface water-cooled wall upper collection box 24, a flag type heating surface water-cooled wall 33, a flag type heating surface 31, a flag type heating surface water-cooled wall lower collection box 36, an outlet water collection box 35, an upper settling chamber 28, a lower settling chamber 34, a flue gas outlet 26, a coal bucket 18 and a support 40. The fire grate is arranged at the bottom of the boiler body part and is fixedly connected with the boiler body 1 of the boiler body part.
Specifically, a space surrounded by the upper part of a front arch water-cooled wall 9, a water-cooled air chamber membrane wall 17, a sealing plate 10, the upper part of a side water-cooled wall 8 and the upper part of a rear arch water-cooled wall 29 of a boiler body part forms a hearth I7.
A furnace chamber II 37 is formed by a space surrounded by a front arch water-cooled wall 9, a rear arch water-cooled wall 29, a front arch lower header 19, a front and rear arch upper header 22, a rear arch and channel rear wall lower header 38 and a side water-cooled wall 8 of a boiler body 1 of a boiler body part.
A biomass combustion chamber 11 is formed by a space surrounded by a bent lower part of a front arch water-cooling wall 9 of a boiler body 1, a bent upper part of a water-cooling air chamber membrane wall 17, a sealing plate 10 and a lower part of a side water-cooling wall 8 of a boiler body part.
A water cooling air chamber 16 is formed by a space enclosed by a water cooling air chamber membrane wall lower header 14, a water cooling air chamber membrane wall upper header 12, a water cooling air chamber membrane wall 17 and a blast cap 15 of a boiler body 1 of a boiler body part.
Settling chambers provided in the body portion of the boiler, including an upper settling chamber 28 and a lower settling chamber 34; the upper settling chamber is formed by a space surrounded by a rear arch water-cooled wall 29 of the boiler body 1, a channel rear wall water-cooled wall 32 and a side water-cooled wall 8; the lower settling chamber is formed by a space surrounded by a channel rear wall water-cooled wall 32, a flag-type heating surface water-cooled wall 33 and a side water-cooled wall 8.
The boiler water circulation flow is that the boiler backwater flows into the boiler barrel 3 through the water inlet pipe 2, and the boiler outlet water flows out through the water outlet header 35. Firstly, the boiler barrel 3, the downcomer II 5 and the front arch lower header 19 are communicated with feed water, and the feed water flows into the front arch upper header 22 and the front arch upper header 21 to return to the boiler barrel 3 after heat exchange of a hearth, so that water circulation of the front arch water-cooled wall 9 is completed;
secondly, the boiler barrel 3, the front side supporting downcomer 6 and the side water-cooled wall lower header 39 are communicated with feed water, and the feed water flows into the side water-cooled wall upper header 25 to return to the boiler barrel 3 after heat exchange of a hearth, so that water circulation of the side water-cooled wall 8 is completed; thirdly, a boiler barrel 3, a downcomer I4, a throttling ring 30 and a rear support downcomer 27 are communicated with a rear arch and channel rear wall lower header 38 for water supply, the water flows into a front arch upper header 22 and a rear arch upper header 23 respectively after heat exchange of a hearth, an upper water return pipe 21 returns to the boiler barrel 3, and water circulation of a rear arch water-cooled wall 29 and a channel rear wall water-cooled wall 32 is completed; and fourthly, the boiler barrel 3 and a water supply pipe 20 are communicated to supply water, the water enters the upper collection box 24 of the flag type heating surface water-cooled wall, enters the flag type heating surface water-cooled wall 33, the flag type heating surface 31 and the lower collection box 36 of the flag type heating surface water-cooled wall through convection heat exchange, the water circulation of the flag type heating surface water-cooled wall 33 is completed, and water is discharged from the water outlet collection box 35.
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 steam outlet is added on the drum 3 to replace the water header 35, the water supply pipe 20 in the body is changed into the gas collecting pipe 20, and the combustion device is a chain grate.
EXAMPLE III
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. 3, the boiler barrel 3 is arranged at the upper right part of the boiler body 1, and the combustion device is a traveling grate.
Example four
The present embodiment is a further improvement on the first embodiment, and includes all the technical features of the first embodiment, as shown in fig. 4, the combustion apparatus is a reciprocating grate.
The utility model discloses a working process and principle do: firstly, biomass particles, crushed materials and coal fall on a chain grate 41 under the action of gravity and are sent into a hearth II 37 to be combusted under the action of mechanical power, the generated heat is absorbed by a front arch water-cooled wall 9, a rear arch water-cooled wall 29 and a side water-cooled wall 8 of the hearth, the generated heat and high-temperature flame are used for drying biomass fuel, directly crushed biomass fuel, granular materials and the like in a biomass combustion chamber 11 through a diluent pipe bent at the lower part of the front arch water-cooled wall 9 and burning the biomass fuel and the granular materials, the generated heat is also absorbed by the front arch water-cooled wall 9, the rear arch water-cooled wall 29 and the side water-cooled wall 8, the cooled flue gas flows upwards through an upper settling chamber 28 and a lower settling chamber 34 and enters a flag-type heating surface 31 to be washed and heat exchanged, the whole heat exchange process is completed, the flue gas is discharged from an outlet 26, and the working process of the boiler. Secondly, the boiler water circulation flow is that the boiler return water flows into the boiler barrel 3 through the water inlet pipe 2, and the boiler outlet water flows out through the water outlet header 35. Firstly, the boiler barrel 3, the downcomer II 5 and the front arch lower header 19 are communicated with feed water, and the feed water flows into the front arch upper header 22 and the front arch upper header 21 to return to the boiler barrel 3 after heat exchange of a hearth, so that water circulation of the front arch water-cooled wall 9 is completed; secondly, the boiler barrel 3, the front side supporting downcomer 6 and the side water-cooled wall lower header 39 are communicated with feed water, and the feed water flows into the side water-cooled wall upper header 25 to return to the boiler barrel 3 after heat exchange of a hearth, so that water circulation of the side water-cooled wall 8 is completed; thirdly, a boiler barrel 3, a downcomer I4, a throttling ring 30 and a rear support downcomer 27 are communicated with a rear arch and channel rear wall lower header 38 for water supply, the water flows into a front arch upper header 22 and a rear arch upper header 23 respectively after heat exchange of a hearth, an upper water return pipe 21 returns to the boiler barrel 3, and water circulation of a rear arch water-cooled wall 29 and a channel rear wall water-cooled wall 32 is completed; and fourthly, the boiler barrel 3 and a water supply pipe 20 are communicated to supply water, the water enters the upper collecting box 24 of the flag type heating surface water-cooled wall, enters the flag type heating surface water-cooled wall 33, the flag type heating surface 31 and the lower collecting box 36 of the flag type heating surface water-cooled wall through convection heat exchange, the water circulation of the flag type heating surface water-cooled wall 33 is completed, water is discharged from the water outlet collecting box 35, and the whole water circulation working process is completed. It is important to point out that this technique double furnace structure and water-cooling wind room structure, the former mainly comprises furnace I7 and furnace II 37, and furnace I7 mainly relies on the high temperature heat and the flame that the fuel burning produced in furnace II 37 to make the biomass fuel of bundling dry the heating in biomass combustion chamber 11 and make its burning, has solved the biomass fuel of direct bundling and can not burn and the insufficient problem of burning. The latter water-cooling wind chamber 16 is designed into a U shape, the upper part of the membrane wall of the U-shaped water-cooling wind chamber is bent into a staggered dilution pipe structure, one part of the membrane wall of the U-shaped water-cooling wind chamber plays a role in supporting, and the membrane wall of the other part of the water-cooling wind chamber is fully distributed with wind caps to play a role in supplying wind. The technology can be a double-hearth composite combustion settling chamber corner tube boiler hot water boiler, a steam boiler, a pulverized coal furnace, a fluidized bed boiler, and also can be other types of boilers. In addition, the technology can be widely applied to other various corner tube boilers.
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 (9)

1. The utility model provides a two furnace composite combustion settling chamber angle pipe boilers which characterized in that: comprises a boiler body part and a combustion system part; the boiler body part comprises a boiler body, a supporting structure and a double-hearth structure are arranged in the boiler body, and the supporting structure comprises a front supporting down pipe and a rear supporting down pipe which are vertically arranged; the utility model discloses a boiler, including boiler body, preceding collateral branch supporting downcomer, boiler body, preceding collateral branch supporting downcomer, lower extreme and side water-cooling wall are connected with the boiler section of thick bamboo, the lower header is connected with the collection case under the lower header of side water-cooling wall on the collateral branch supporting downcomer both ends, rear collateral branch supporting downcomer both ends are equallyd divide and are connected with collection case and side water-cooling wall under collection case on the side water-cooling wall that the level set up respectively, boiler body one side top is provided with the boiler section of thick bamboo, be connected with the inlet tube on the boiler section of thick bamboo, boiler bottom be connected with downcomer I of rear collateral branch supporting downcomer intercommunication, II bottoms of downcomer are connected with preceding hunch collection case down, boiler body internal top be provided with preceding hunch.
2. The double-hearth composite combustion settling chamber corner tube boiler of 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 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 a space structure formed by the whole front arch water-cooled wall, the rear arch water-cooled wall and the side water-cooled wall in a surrounding mode; the upper end of the front arch water-cooled wall is connected with the front and rear arch 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 membrane wall upper header, and the lower end of the water-cooled chamber membrane wall is connected with the water-cooled chamber membrane wall lower header; the space enclosed by the bent lower part of the front arch water-cooled wall, the bent upper part of the water-cooled air chamber membrane wall, the sealing plate and the lower part of the side water-cooled wall forms a biomass combustion chamber;
the upper end of the rear arch water-cooled wall is connected with the front and rear arch upper header, the lower end of the rear arch water-cooled wall is connected with the rear arch and the channel rear wall lower header, the outer side of the rear arch water-cooled wall is provided with a channel rear wall water-cooled wall, the upper end of the channel rear wall water-cooled wall is connected with the channel rear wall upper header, the lower end of the channel rear wall water-cooled wall is connected with the rear arch and the channel rear wall lower header, the outer side of the channel rear wall water-cooled wall is provided with a flag type heating surface water-cooled wall, the bottom of the flag type heating surface water-cooled wall is connected with an outlet header through the flag type heating surface water-cooled wall lower header, and the top of the flag type heating surface water-cooled wall is connected with the flag type; a flue gas circulation port is formed above the rear arch water-cooled wall, and a flue gas outlet is formed above the flag type heating surface water-cooled wall.
3. The double-hearth composite combustion settling chamber corner tube boiler of claim 2, characterized in that: the biomass combustion chamber is designed into a U-shaped structure and is composed of a space enclosed by a staggered lean-draw tube structure bent at the lower part of a front arch water-cooling wall with an inward convex lower part, a staggered lean-draw tube structure bent at the upper part of a water-cooling air chamber membrane wall and a sealing plate.
4. The double-hearth composite combustion settling chamber corner tube boiler of 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 membrane wall collecting box, an upper water-cooling air chamber membrane wall collecting box, a water-cooling air chamber membrane wall and an air cap.
5. The double-hearth composite combustion settling chamber corner tube boiler of claim 4, characterized in that: the boiler barrel is communicated with a water supply pipe, the top of the water supply pipe is communicated with the upper header of the flag type heating surface water-cooled wall, the upper header of the flag type heating surface water-cooled wall is communicated with the lower header of the flag type heating surface water-cooled wall through the flag type heating surface water-cooled wall, and the lower header of the flag type heating surface water-cooled wall is communicated with the water outlet header.
6. The double-hearth composite combustion settling chamber corner tube boiler of claim 5, characterized in that: the sealing plates are designed to be arranged in two parallel rows, one of which is open and the other is closed.
7. The double-hearth composite combustion settling chamber corner tube boiler of claim 6, characterized in that: the settling chamber comprises an upper settling chamber and a lower settling chamber, and the upper settling chamber is formed by a space surrounded by a rear arch water-cooled wall, a channel rear wall water-cooled wall and a side water-cooled wall; the lower settling chamber is formed by a space surrounded by a channel rear wall water-cooled wall, a flag type heating surface water-cooled wall and a side water-cooled wall.
8. The double-hearth composite combustion settling chamber corner tube boiler of claim 7, characterized in that: and a throttling ring is arranged on the rear side support descending pipe.
9. The double-hearth composite combustion settling chamber corner tube boiler of claim 2, characterized in that: and the bottom of the collector below the side water-cooling wall is provided with symmetrically arranged supports.
CN201920290361.2U 2019-03-08 2019-03-08 Double-hearth composite combustion settling chamber corner tube boiler Active CN209944290U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109737371A (en) * 2019-03-08 2019-05-10 哈尔滨四方锅炉有限公司 A kind of twin furnace compound combustion expansion chamber corner tube boiler

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109737371A (en) * 2019-03-08 2019-05-10 哈尔滨四方锅炉有限公司 A kind of twin furnace compound combustion expansion chamber corner tube boiler

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