CN215863355U - Biomass fuel high-pressure lower air supply fluidized bed combustion chamber - Google Patents
Biomass fuel high-pressure lower air supply fluidized bed combustion chamber Download PDFInfo
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- CN215863355U CN215863355U CN202122088937.7U CN202122088937U CN215863355U CN 215863355 U CN215863355 U CN 215863355U CN 202122088937 U CN202122088937 U CN 202122088937U CN 215863355 U CN215863355 U CN 215863355U
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Abstract
The utility model discloses a biomass fuel high-pressure lower air supply fluidized bed combustion chamber, which comprises a boiler furnace part and a combustion system part, wherein the boiler furnace part is connected with a combustion system part; the hearth structure comprises a left side wall lower collecting box, a right side wall water-cooled wall, a left side wall upper collecting box, a right side wall upper collecting box, a chain mechanical grate, a hearth front wall lower collecting box, a hearth front wall upper collecting box, a hearth rear wall upper collecting box and a hearth rear wall lower collecting box; the upper ends of the water cooled walls of the left and right side walls are connected with the upper header of the left and right side walls; the lower ends of the left and right side wall water-cooled walls are connected with the left and right side wall lower header; the upper end of the rear wall of the hearth is connected with a header on the rear wall of the hearth; the lower end of the rear wall of the hearth is connected with a lower header of the rear wall of the hearth; the upper end of the front wall of the hearth is connected with a header on the front wall of the hearth; the lower end of the front wall of the hearth is connected with a lower header of the front wall of the hearth; simple structure, convenient to use, the alpha reaction zone that forms between the wall bending region behind furnace antetheca and the furnace, messenger's fuel that can be fine burns, makes more abundant of burning.
Description
Technical Field
The utility model relates to the technical field of boilers, in particular to a biomass fuel high-pressure lower air supply fluidized bed combustion chamber which can meet the requirements of biomass boiler emission and carbon neutralization, and solves the problems of biomass fuel, such as low calorific value, low hearth temperature, insufficient combustion, low thermal efficiency, serious slag bonding, high emission concentration of nitrogen oxides and environmental pollution.
Background
As is well known, with the increasing demand for energy from society, fossil fuels, which are major energy sources, are rapidly decreasing and the pollution is severe. Therefore, the search for an alternative energy source has become a focus of general social attention. The biomass energy is an important available energy, has the characteristics of greenness, low carbon, cleanness, renewability and the like, and is important for accelerating the development and utilization of the biomass energy. However, the existing biomass fuel is generally stored in a boiler, so that the heat value of the raw material is low, the temperature of a hearth is low, the combustion is insufficient, the use cost is increased, the emission concentration of nitrogen oxides is high, the slag bonding is serious, and the thermal efficiency of the boiler is low. Therefore, the problem that how to burn biomass into the boiler directly and fully, reduce the emission of nitrogen oxides, solve the problem of slagging and improve the thermal efficiency of the boiler is needed to be solved urgently at present.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the technical defects and provide a biomass fuel high-pressure lower air supply fluidized bed combustion chamber.
In order to solve the technical problems, the technical scheme provided by the utility model is that a biomass fuel high-pressure lower air supply fluidized bed combustion chamber comprises: comprises a boiler furnace part and a combustion system part;
the hearth structure comprises a left side wall lower collecting box, a right side wall water-cooled wall, a left side wall upper collecting box, a right side wall upper collecting box, a chain mechanical grate, a hearth front wall lower collecting box, a hearth front wall upper collecting box, a hearth rear wall upper collecting box and a hearth rear wall lower collecting box; the upper ends of the left and right side wall water cooling walls are connected with the left and right side wall upper header; the lower ends of the left and right side wall water-cooled walls are connected with the left and right side wall lower header; the upper end of the rear wall of the hearth is connected with a header on the rear wall of the hearth; the lower end of the rear wall of the hearth is connected with a lower header of the rear wall of the hearth; the upper end of the front wall of the hearth is connected with a header on the front wall of the hearth; the lower end of the front wall of the hearth is connected with a lower header of the front wall of the hearth;
the lower part of the front wall of the hearth and the lower part of the rear wall of the hearth are of bent structures, and a lower fluidized bed chamber is formed between bent areas of the front wall of the hearth and the rear wall of the hearth; a combustion chamber is arranged in the boiler furnace and consists of a space enclosed by a water-cooled wall on the left side wall and the right side wall, a furnace back wall and a furnace front wall; the mechanical fire grate is provided with a feeding port, and the rear wall of the hearth is provided with a flue gas outlet.
As an improvement, the lower fluidized bed chamber is formed by a space surrounded by the lower part of the front wall of the hearth, the lower parts of the water cooled walls of the left side wall and the right side wall, the straight radiation screen of the rear wall of the hearth, the radiation wall and the chain mechanical fire grate.
As an improvement, the lower fluidized bed chamber is provided with an alpha reaction zone, the alpha reaction zone is formed by a space surrounded by a bending structure at the lower part of the front wall of the hearth, a straight radiation screen at the rear wall of the hearth, a radiation wall and a mechanical furnace grate, and the alpha reaction zone enables fuel to be more fully combusted, so that the problem of low thermal efficiency is solved.
As an improvement, the air box is arranged below the left side wall and the right side wall lower headers and connected with a high-pressure air channel, the high-pressure air channel is connected with a high-pressure fan, and the air box is connected with a combustion chamber.
As an improvement, the chain mechanical grate can be replaced by a reciprocating mechanical grate, a reciprocating chain combined grate and a vibrating grate.
As an improvement, the fuel of the lower fluidized bed chamber is biomass fuel and coal.
As a modification, the combustion mode of the combustion chamber is fluidized bed combustion.
Compared with the prior art, the utility model has the advantages that: simple structure, convenient to use, the alpha reaction zone that forms between the wall bending region behind furnace antetheca and the furnace, messenger's fuel that can be fine burns, makes more abundant of burning.
Drawings
FIG. 1 is a front view of an embodiment of a high-pressure lower-blowing fluidized bed combustion chamber for biomass fuel according to the present invention.
FIG. 2 is a front view of a combustion embodiment of a biomass fuel high-pressure lower blowing fluidized bed combustion chamber of the present invention.
FIG. 3 is a front view of a high-pressure lower-blowing fluidized bed combustion chamber of biomass fuel according to the present invention.
FIG. 4 is a front view of a high-pressure lower-blowing fluidized bed combustion chamber of biomass fuel according to a third embodiment of the present invention.
As shown in the figure: 1. the chain mechanical grate comprises a chain mechanical grate, 2, a feeding port, 3, left and right side wall lower headers, 4, a hearth front wall lower header, 5, a hearth front wall, 6, left and right side wall water cooling walls, 7, flue gas, 8, left and right side wall upper headers, 9, a hearth rear wall upper header, 10, a hearth front wall upper header, 11, a flue gas outlet, 12, a hearth rear wall, 13, combustion materials, 14, a lower fluidized bed chamber 15, a hearth rear wall straight radiation screen, 16, an alpha reaction zone, 17, a radiation wall, 18, a bellows, 19, a high-pressure air channel, 20, a hearth rear wall lower header, 21, a high-pressure fan, 22 and a combustion chamber.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
The purpose of the utility model is: the biomass fuel high-pressure lower air supply fluidized bed combustion chamber is provided by aiming at solving the problems commonly existing in the prior art and overcoming the defects and shortcomings of the prior art. The alpha reaction zone formed by the lower fluidized bed chamber enables the biomass fuel to be fully combusted in the combustion chamber, reduces the emission of nitrogen oxides, and accordingly improves the thermal efficiency of the boiler.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Example one
The utility model provides a biomass fuel high-pressure lower air supply fluidized bed combustion chamber, which comprises: comprises a boiler furnace part and a combustion system part;
the hearth structure comprises a left side wall lower header 3, a right side wall water-cooled wall 6, a left side wall upper header 8, a right side wall upper header 8, a chain mechanical grate 1, a hearth front wall lower header 4, a hearth front wall 5, a hearth front wall upper header 10, a hearth rear wall 12, a hearth rear wall upper header 9 and a hearth rear wall lower header 20.
Specifically, the upper ends of the left and right side wall water-cooled walls 6 are connected with left and right side wall upper headers 8; the lower ends of the left and right side wall water-cooled walls 6 are connected with the left and right side wall lower header 3; the upper end of the hearth back wall 12 is connected with a header 9 on the hearth back wall; the lower end of the hearth back wall 12 is connected with a lower header 20 of the hearth back wall; the upper end of the hearth front wall 5 is connected with an upper header 10 of the hearth front wall; the lower end of the front wall 5 of the hearth is connected with the lower header 4 of the front wall of the hearth;
specifically, the lower part of the front hearth wall 5 and the lower part of the rear hearth wall 12 are of bent structures, and a lower fluidized bed chamber 14 is formed between bent areas of the front hearth wall 5 and the rear hearth wall 12; a combustion chamber 22 is arranged in the boiler furnace, and the combustion chamber 22 is composed of a space surrounded by a left side wall water-cooled wall 6, a right side wall water-cooled wall 6, a furnace rear wall 12 and a furnace front wall 5; the mechanical fire grate 1 is provided with a feeding port 2, and the rear wall 12 of the hearth is provided with a flue gas outlet 11.
Specifically, the lower fluidized bed chamber 14 is formed by a space surrounded by the lower part of the front wall 5 of the hearth, the lower parts of the water cooling walls 6 of the left side wall and the right side wall, the straight radiation screen 15 of the rear wall of the hearth, the radiation wall 17 and the chain mechanical fire grate 1.
Specifically, the lower fluidized bed chamber 17 is provided with an alpha reaction zone 16, the alpha reaction zone 16 is formed by a space surrounded by a bending structure at the lower part of the front wall 5 of the hearth, a straight radiation screen 15 at the rear wall of the hearth, a radiation wall 17 and a mechanical grate 1, and the alpha reaction zone 16 enables fuel to be more fully combusted, so that the problem of low thermal efficiency is solved.
Specifically, still include bellows 18, bellows 18 is in the below of controlling lateral wall collection case 3, bellows 18 is connected with high-pressure air channel 19, high-pressure air channel is connected with high pressure positive blower 21, combustion chamber 22 is connected to bellows 18, high-pressure air channel 19 and high pressure positive blower 21 constitute high-pressure air supply part.
Example two
The utility model provides a biomass fuel high-pressure lower air supply fluidized bed combustion chamber, which comprises: comprises a boiler furnace part and a combustion system part;
the hearth structure comprises a left side wall lower header 3, a right side wall water-cooled wall 6, a left side wall upper header 8, a right side wall upper header 8, a chain mechanical grate 1, a hearth front wall lower header 4, a hearth front wall 5, a hearth front wall upper header 10, a hearth rear wall 12, a hearth rear wall upper header 9 and a hearth rear wall lower header 20.
Specifically, the upper ends of the left and right side wall water-cooled walls 6 are connected with left and right side wall upper headers 8; the lower ends of the left and right side wall water-cooled walls 6 are connected with the left and right side wall lower header 3; the upper end of the hearth back wall 12 is connected with a header 9 on the hearth back wall; the lower end of the hearth back wall 12 is connected with a lower header 20 of the hearth back wall; the upper end of the hearth front wall 5 is connected with an upper header 10 of the hearth front wall; the lower end of the front wall 5 of the hearth is connected with the lower header 4 of the front wall of the hearth;
specifically, the lower part of the front hearth wall 5 and the lower part of the rear hearth wall 12 are of bent structures, and a lower fluidized bed chamber 14 is formed between bent areas of the front hearth wall 5 and the rear hearth wall 12; a combustion chamber 22 is arranged in the boiler furnace, and the combustion chamber 22 is composed of a space surrounded by a left side wall water-cooled wall 6, a right side wall water-cooled wall 6, a furnace rear wall 12 and a furnace front wall 5; the mechanical fire grate 1 is provided with a feeding port 2, and the rear wall 12 of the hearth is provided with a flue gas outlet 11.
Specifically, the lower fluidized bed chamber 14 is formed by a space surrounded by the lower part of the front wall 5 of the hearth, the lower parts of the water cooling walls 6 of the left side wall and the right side wall, the straight radiation screen 15 of the rear wall of the hearth, the radiation wall 17 and the chain mechanical fire grate 1.
Specifically, the lower fluidized bed chamber 17 is provided with an alpha reaction zone 16, the alpha reaction zone 16 is formed by a space surrounded by a bending structure at the lower part of the front wall 5 of the hearth, a straight radiation screen 15 at the rear wall of the hearth, a radiation wall 17 and a mechanical grate 1, and the alpha reaction zone 16 enables fuel to be more fully combusted, so that the problem of low thermal efficiency is solved.
Specifically, still include bellows 18, bellows 18 is in the below of controlling lateral wall collection case 3, bellows 18 is connected with high-pressure air channel 19, high-pressure air channel is connected with high pressure positive blower 21, combustion chamber 22 is connected to bellows 18, high-pressure air channel 19 and high pressure positive blower 21 constitute high-pressure air supply part.
As shown in fig. 2, in particular, the chain mechanical grate 1 is arranged below the combustion chamber 22, and the chain mechanical grate 1 is replaced by a reciprocating mechanical grate.
EXAMPLE III
The utility model provides a biomass fuel high-pressure lower air supply fluidized bed combustion chamber, which comprises: comprises a boiler furnace part and a combustion system part;
the hearth structure comprises a left side wall lower header 3, a right side wall water-cooled wall 6, a left side wall upper header 8, a right side wall upper header 8, a chain mechanical grate 1, a hearth front wall lower header 4, a hearth front wall 5, a hearth front wall upper header 10, a hearth rear wall 12, a hearth rear wall upper header 9 and a hearth rear wall lower header 20.
Specifically, the upper ends of the left and right side wall water-cooled walls 6 are connected with left and right side wall upper headers 8; the lower ends of the left and right side wall water-cooled walls 6 are connected with the left and right side wall lower header 3; the upper end of the hearth back wall 12 is connected with a header 9 on the hearth back wall; the lower end of the hearth back wall 12 is connected with a lower header 20 of the hearth back wall; the upper end of the hearth front wall 5 is connected with an upper header 10 of the hearth front wall; the lower end of the front wall 5 of the hearth is connected with the lower header 4 of the front wall of the hearth;
specifically, the lower part of the front hearth wall 5 and the lower part of the rear hearth wall 12 are of bent structures, and a lower fluidized bed chamber 14 is formed between bent areas of the front hearth wall 5 and the rear hearth wall 12; a combustion chamber 22 is arranged in the boiler furnace, and the combustion chamber 22 is composed of a space surrounded by a left side wall water-cooled wall 6, a right side wall water-cooled wall 6, a furnace rear wall 12 and a furnace front wall 5; the mechanical fire grate 1 is provided with a feeding port 2, and the rear wall 12 of the hearth is provided with a flue gas outlet 11.
Specifically, the lower fluidized bed chamber 14 is formed by a space surrounded by the lower part of the front wall 5 of the hearth, the lower parts of the water cooling walls 6 of the left side wall and the right side wall, the straight radiation screen 15 of the rear wall of the hearth, the radiation wall 17 and the chain mechanical fire grate 1.
Specifically, the lower fluidized bed chamber 17 is provided with an alpha reaction zone 16, the alpha reaction zone 16 is formed by a space surrounded by a bending structure at the lower part of the front wall 5 of the hearth, a straight radiation screen 15 at the rear wall of the hearth, a radiation wall 17 and a mechanical grate 1, and the alpha reaction zone 16 enables fuel to be more fully combusted, so that the problem of low thermal efficiency is solved.
Specifically, still include bellows 18, bellows 18 is in the below of controlling lateral wall collection case 3, bellows 18 is connected with high-pressure air channel 19, high-pressure air channel is connected with high pressure positive blower 21, combustion chamber 22 is connected to bellows 18, high-pressure air channel 19 and high pressure positive blower 21 constitute high-pressure air supply part.
As shown in fig. 3, in particular, the chain mechanical grate 1 is arranged below the combustion chamber 22, and the chain mechanical grate 1 is replaced by a reciprocating chain combined grate.
Example four
The utility model provides a biomass fuel high-pressure lower air supply fluidized bed combustion chamber, which comprises: comprises a boiler furnace part and a combustion system part;
the hearth structure comprises a left side wall lower header 3, a right side wall water-cooled wall 6, a left side wall upper header 8, a right side wall upper header 8, a chain mechanical grate 1, a hearth front wall lower header 4, a hearth front wall 5, a hearth front wall upper header 10, a hearth rear wall 12, a hearth rear wall upper header 9 and a hearth rear wall lower header 20.
Specifically, the upper ends of the left and right side wall water-cooled walls 6 are connected with left and right side wall upper headers 8; the lower ends of the left and right side wall water-cooled walls 6 are connected with the left and right side wall lower header 3; the upper end of the hearth back wall 12 is connected with a header 9 on the hearth back wall; the lower end of the hearth back wall 12 is connected with a lower header 20 of the hearth back wall; the upper end of the hearth front wall 5 is connected with an upper header 10 of the hearth front wall; the lower end of the front wall 5 of the hearth is connected with the lower header 4 of the front wall of the hearth;
specifically, the lower part of the front hearth wall 5 and the lower part of the rear hearth wall 12 are of bent structures, and a lower fluidized bed chamber 14 is formed between bent areas of the front hearth wall 5 and the rear hearth wall 12; a combustion chamber 22 is arranged in the boiler furnace, and the combustion chamber 22 is composed of a space surrounded by a left side wall water-cooled wall 6, a right side wall water-cooled wall 6, a furnace rear wall 12 and a furnace front wall 5; the mechanical fire grate 1 is provided with a feeding port 2, and the rear wall 12 of the hearth is provided with a flue gas outlet 11.
Specifically, the lower fluidized bed chamber 14 is formed by a space surrounded by the lower part of the front wall 5 of the hearth, the lower parts of the water cooling walls 6 of the left side wall and the right side wall, the straight radiation screen 15 of the rear wall of the hearth, the radiation wall 17 and the chain mechanical fire grate 1.
Specifically, the lower fluidized bed chamber 17 is provided with an alpha reaction zone 16, the alpha reaction zone 16 is formed by a space surrounded by a bending structure at the lower part of the front wall 5 of the hearth, a straight radiation screen 15 at the rear wall of the hearth, a radiation wall 17 and a mechanical grate 1, and the alpha reaction zone 16 enables fuel to be more fully combusted, so that the problem of low thermal efficiency is solved.
Specifically, still include bellows 18, bellows 18 is in the below of controlling lateral wall collection case 3, bellows 18 is connected with high-pressure air channel 19, high-pressure air channel is connected with high pressure positive blower 21, combustion chamber 22 is connected to bellows 18, high-pressure air channel 19 and high pressure positive blower 21 constitute high-pressure air supply part.
As shown in fig. 4, in particular, the chain mechanical grate 1 is arranged below the combustion chamber 22, and the chain mechanical grate 1 is replaced by a vibrating grate.
The working process and principle of the utility model are as follows: firstly, the combustion materials 13 enter from the feeding port 2 and are combusted in the lower fluidized bed chamber 14 through the chain mechanical grate 1, a space which is designed in the lower fluidized bed chamber 14 and is surrounded by a lower bending structure of the front wall 5 of the hearth, a straight radiation screen 15 of the rear wall of the hearth, a radiation wall 17 and the mechanical grate 1 forms an alpha reaction zone 16, the combustion materials 13 are fully combusted in the alpha reaction zone 16, and the flue gas 7 upwards flows and is discharged from the flue gas outlet 11. Secondly, the high pressure fan 21 sends high pressure air into the air box 18 through the high pressure air channel 19, and the air box 18 blows the high pressure air into the lower fluidized bed chamber 14, so that the fuel is accelerated and fully combusted.
The present invention and its embodiments have been described above, and the description is not intended to be limiting, and the drawings are only one embodiment of the present invention, and the actual structure is not limited thereto. In summary, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention without departing from the spirit and scope of the utility model as defined by the appended claims.
Claims (7)
1. The utility model provides a biomass fuel high pressure lower part air supply fluidized bed combustor which characterized in that: comprises a boiler furnace part and a combustion system part;
the hearth structure comprises a left side wall lower collecting box, a right side wall water-cooled wall, a left side wall upper collecting box, a right side wall upper collecting box, a chain mechanical grate, a hearth front wall lower collecting box, a hearth front wall upper collecting box, a hearth rear wall upper collecting box and a hearth rear wall lower collecting box; the upper ends of the left and right side wall water cooling walls are connected with the left and right side wall upper header; the lower ends of the left and right side wall water-cooled walls are connected with the left and right side wall lower header; the upper end of the rear wall of the hearth is connected with a header on the rear wall of the hearth; the lower end of the rear wall of the hearth is connected with a lower header of the rear wall of the hearth; the upper end of the front wall of the hearth is connected with a header on the front wall of the hearth; the lower end of the front wall of the hearth is connected with a lower header of the front wall of the hearth;
the lower part of the front wall of the hearth and the lower part of the rear wall of the hearth are of bent structures, and a lower fluidized bed chamber is formed between bent areas of the front wall of the hearth and the rear wall of the hearth; a combustion chamber is arranged in the boiler furnace and consists of a space enclosed by a water-cooled wall on the left side wall and the right side wall, a furnace back wall and a furnace front wall; the mechanical fire grate is provided with a feeding port, and the rear wall of the hearth is provided with a flue gas outlet.
2. The biomass fuel high-pressure lower air supply fluidized bed combustion chamber as claimed in claim 1, characterized in that: the lower fluidized bed chamber is formed by a space surrounded by the lower part of the front wall of the hearth, the lower parts of the water cooling walls of the left side wall and the right side wall, the straight radiation screen of the rear wall of the hearth, the radiation wall and the chain mechanical grate.
3. The biomass fuel high-pressure lower air supply fluidized bed combustion chamber as claimed in claim 2, characterized in that: the lower fluidized bed chamber is provided with an alpha reaction zone, the alpha reaction zone is formed by a space surrounded by a lower bending structure of the front wall of the hearth, a straight radiation screen of the rear wall of the hearth, a radiation wall and a mechanical grate, and the alpha reaction zone enables fuel to be more fully combusted, so that the problem of low thermal efficiency is solved.
4. The biomass fuel high-pressure lower air supply fluidized bed combustion chamber as claimed in claim 1, characterized in that: still include bellows, bellows are in the below of controlling lateral wall collection case, bellows and high-pressure draught channel connection, the high-pressure draught channel is connected with high pressure positive blower, the combustion chamber is connected to the bellows.
5. The biomass fuel high-pressure lower air supply fluidized bed combustion chamber as claimed in claim 1, characterized in that: the chain mechanical grate can also be replaced by a reciprocating mechanical grate, a reciprocating chain combined grate and a vibrating grate.
6. The biomass fuel high-pressure lower air supply fluidized bed combustion chamber as claimed in claim 1, characterized in that: the fuel of the lower fluidized bed chamber is biomass fuel and coal.
7. The biomass fuel high-pressure lower air supply fluidized bed combustion chamber as claimed in claim 1, characterized in that: the combustion mode of the combustion chamber is fluidized bed combustion.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122088937.7U CN215863355U (en) | 2021-08-30 | 2021-08-30 | Biomass fuel high-pressure lower air supply fluidized bed combustion chamber |
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| CN202122088937.7U CN215863355U (en) | 2021-08-30 | 2021-08-30 | Biomass fuel high-pressure lower air supply fluidized bed combustion chamber |
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| CN215863355U true CN215863355U (en) | 2022-02-18 |
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| CN202122088937.7U Active CN215863355U (en) | 2021-08-30 | 2021-08-30 | Biomass fuel high-pressure lower air supply fluidized bed combustion chamber |
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