CN215209265U - Combustion chamber and biomass gasification system comprising same - Google Patents
Combustion chamber and biomass gasification system comprising same Download PDFInfo
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- CN215209265U CN215209265U CN202121270902.9U CN202121270902U CN215209265U CN 215209265 U CN215209265 U CN 215209265U CN 202121270902 U CN202121270902 U CN 202121270902U CN 215209265 U CN215209265 U CN 215209265U
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Abstract
The utility model relates to a combustion chamber, which comprises a chamber connecting pipe and a cavity type wall body, wherein the cavity type wall body is provided with an air inlet and an air outlet, and a biomass gas combustion chamber, a smoke low-nitrogen combustion control chamber and a smoke recycling chamber which are sequentially communicated are arranged in the cavity type wall body along the air flow direction; an air supply port communicated with the biomass gas combustion cavity is arranged on the cavity type wall body; a feeding port communicated with the smoke low-nitrogen combustion control cavity is arranged on the cavity type wall body, and ammonia water or urea is conveyed into the smoke low-nitrogen combustion control cavity through the feeding port; two ends of the chamber connecting pipe are respectively communicated with the flue gas outlet of the economizer and the flue gas recycling chamber. The utility model has the advantages that: make biomass gas reach complete combustion through using this combustion chamber, improve the thermal efficiency, get rid of harmful substance such as tar in the living beings combustible gas through the mode of burning simultaneously, reduce nitrogen oxide's in the tail gas content, guarantee the continuous safe and stable production of biomass gasification stove, improve biomass gas heat energy conversion rate.
Description
Technical Field
The utility model relates to a biomass incineration field, concretely relates to combustion chamber reaches biomass gasification system who contains it.
Background
The biomass gasification technology is renewable, converts biomass resources into high-quality clean energy and utilizes the high-efficiency technology, and plays an important role in relieving energy shortage, improving ecological environment and realizing the strategic targets of national carbon peak reaching and carbon neutralization. The combustible gas produced by the biomass gasification furnace is hydrogen, carbon monoxide, methane and the like, the combustible component proportion is low, and the calorific value is usually 900Kcal/m3-1400Kcal/m3And belongs to low heating value gas. Tar is an inevitable by-product in the biomass gasification process, tar generated by biomass gasification has the characteristics of complex components, variable properties, high harmfulness and the like, the tar in biomass gas cannot be completely removed by a traditional spray water bath method, a cloth bag filtering method and the like for treating the tar, and water or filter materials required for treating the tar also need to be subjected to secondary treatment and easily cause secondary pollution. In the industrial application field, the biomass gas combustion method is to introduce gas generated by a biomass gasification furnace into a stainless steel burner for combustion, obtain high-temperature gas to enter a boiler, but because the gas contains tar and ash particles, the gas jet of the burner is easy to block, and simultaneously because low-calorific-value gas is easy to extinguish due to the fluctuation of combustible components of the gas in the actual production, a biomass gas extinguishing detection system is required to be arranged to prevent the gas from gathering due to untimely ignition after extinguishing, and the secondary ignition has explosion danger. In practical application, the reignition of the burner after the fire is cut off is unreliable due to the adoption of a spark electrode, and the reignition is usually assisted by using a liquefied petroleum gas gun. In the combustion processMore nitrogen oxides and dust can be discharged, parts are easy to block or damage, the maintenance and operation cost of the equipment is high, and the continuous reliability is poor.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem of providing a combustion chamber and a biomass gasification system and a method containing the same so as to overcome the defects in the prior art.
The utility model provides an above-mentioned technical problem's technical scheme as follows: a combustion chamber comprises a chamber connecting pipe and a cavity type wall body, wherein the cavity type wall body is provided with an air inlet and an air outlet, and a biomass gas combustion chamber, a smoke low-nitrogen combustion control chamber and a smoke recycling chamber which are sequentially communicated are arranged in the cavity type wall body along the air flow direction; an air supply port communicated with the biomass gas combustion cavity is arranged on the cavity type wall body; a feeding port communicated with the smoke low-nitrogen combustion control cavity is arranged on the cavity type wall body, and ammonia water or urea is conveyed into the smoke low-nitrogen combustion control cavity through the feeding port; two ends of the chamber connecting pipe are respectively communicated with the flue gas outlet of the economizer and the flue gas recycling chamber.
The utility model has the advantages that: make living beings combustible gas reach complete combustion through using this combustion chamber, improve the thermal efficiency, get rid of harmful substance such as tar in the living beings gas through the mode of burning simultaneously, reduce nitrogen oxide's in the tail gas content, guarantee the continuous safe and stable production of biomass gasification stove, improve living beings gas heat energy conversion.
On the basis of the technical scheme, the utility model discloses can also do following improvement.
Furthermore, a first cavity is arranged between the air inlet and the biomass gas combustion cavity in the cavity wall body, and a fire hole is formed in the cavity wall body at the position corresponding to the first cavity.
Adopt above-mentioned further beneficial effect to do: the biomass combustible gas entering the combustion chamber through the air inlet is conveniently ignited.
Furthermore, three partition walls are sequentially arranged in the cavity type wall body along the airflow direction so as to divide a biomass gas combustion chamber, a smoke low-nitrogen combustion control chamber and a smoke recycling chamber in the cavity type wall body; each partition wall is provided with an airflow hole along the airflow direction; a flow channel is arranged on the lee side of each partition wall; a flow passage on the partition wall close to the air inlet is communicated with the air supplementing opening; a flow passage on the partition wall close to the air outlet is communicated with the chamber connecting pipe; the flow channel on the middle partition wall is communicated with the material supplementing port.
Furthermore, the partition wall is built by a plurality of combined bricks in a multi-layer mode, and each combined brick is provided with an airflow hole; and plugging materials are filled between part of two adjacent layers of combined bricks along the wind surface of the partition wall, so that single-side plugging is realized, and a flow channel is formed on the leeward surface. Further, an air supply pipe is arranged in the air supply opening; the material supplementing pipe is arranged in the material supplementing opening.
Furthermore, the number of the flow channels on the partition wall is nine; the number of the air supply ports and the material supply ports is nine.
Furthermore, the outer contour shape of each combined brick is in a regular octagonal column shape.
Furthermore, each combined brick is formed by oppositely combining two same special-shaped refractory bricks.
Furthermore, explosion-proof openings are formed in the positions, corresponding to the biomass gas combustion cavity and the smoke low-nitrogen combustion control cavity, of the cavity type wall body.
Adopt above-mentioned further beneficial effect to do: the operation safety is guaranteed.
A biomass gasification system comprises a biomass gasification furnace, a waste heat boiler, an economizer, an induced draft fan and a combustion chamber; the biomass gasification furnace, the combustion chamber, the waste heat boiler, the economizer and the induced draft fan are communicated in sequence along the airflow direction.
Adopt above-mentioned further beneficial effect to do: the biomass combustible gas can be completely combusted, and the heat efficiency is improved; harmful substances such as tar in the biomass gas are removed in a combustion mode, the content of nitrogen oxide in tail gas is reduced, continuous safe and stable production of the biomass gasification furnace is ensured, and the heat energy conversion rate of the biomass gas is improved.
Drawings
FIG. 1 is a front view of a biomass gasification system;
FIG. 2 is a top plan view of a biomass gasification system;
FIG. 3 is a front view of the combustion chamber;
FIG. 4 is a top view of the combustion chamber;
FIG. 5 is a cross-sectional view of FIG. 3;
FIG. 6 is an enlarged view of the partition wall;
FIG. 7 is a cross-sectional view of FIG. 6;
FIG. 8 is a structural view of the shaped refractory bricks.
In the drawings, the components represented by the respective reference numerals are listed below:
1. the biomass gasification furnace comprises a combustion chamber, 110, a chamber connecting pipe, 120, a cavity type wall body, 121, a fire leading port, 122, an explosion-proof port, 123, an ash removing port, 124, an air inlet, 125, an air outlet, 130, a biomass gas combustion chamber, 140, a smoke low-nitrogen combustion control chamber, 150, a smoke recycling chamber, 160, a partition wall, 161, an airflow hole, 162, a flow channel, 163, a combined brick, 1631, a special-shaped refractory brick, 170, a first chamber, 180, an air supplementing pipe, 190, a material supplementing pipe, 2, a waste heat boiler, 3, a coal economizer, 4, an induced draft fan, 5 and a biomass gasification furnace.
Detailed Description
The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.
Example 1
As shown in fig. 3 to 7, a combustion chamber includes a chamber connecting pipe 110 and a cavity wall 120, the cavity wall 120 is provided with an air inlet 124 and an air outlet 125, and a biomass gas combustion chamber 130, a flue gas low-nitrogen combustion control chamber 140 and a flue gas recycling chamber 150 which are sequentially communicated are arranged in the cavity wall 120 along an air flow direction;
an air supply opening communicated with the biomass gas combustion cavity 130 is formed in the cavity type wall body 120, and air can be supplied into the biomass gas combustion cavity 130 through the air supply opening;
the cavity type wall body 120 is provided with a feeding port communicated with the flue gas low-nitrogen combustion control cavity 140, ammonia water or urea is conveyed into the flue gas low-nitrogen combustion control cavity 140 through the feeding port, and the ammonia water or urea reacts with nitric oxide after entering the flue gas low-nitrogen combustion control cavity 140, so that the content of the nitric oxide is reduced;
the two ends of the chamber connecting pipe 110 are respectively communicated with the flue gas outlet and the flue gas recycling cavity 150 of the economizer 3, and the flue gas discharged from the economizer 3 can flow back to the flue gas recycling cavity 150 through the chamber connecting pipe 110, so that the recycling of the flue gas is realized, and the temperature and the oxygen content of the combustion chamber 1 are adjusted.
Example 2
As shown in fig. 3 to 7, the present embodiment is a further improvement on embodiment 1, and specifically includes the following steps:
the first cavity 170 is arranged between the air inlet 124 and the biomass gas combustion cavity 130 in the cavity wall 120, and the ignition port 121 is arranged at the position corresponding to the first cavity 170 on the cavity wall 120, so that the biomass combustible gas entering the combustion chamber through the air inlet 124 can be ignited conveniently.
Example 3
As shown in fig. 3 to 7, this embodiment is a further improvement on embodiment 1 or 2, and specifically includes the following steps:
three partition walls 160 are sequentially arranged in the cavity-type wall 120 along the airflow direction to divide the biomass gas combustion chamber 130, the flue gas low-nitrogen combustion control chamber 140 and the flue gas recycling chamber 150 into the cavity-type wall 120, wherein the first chamber 170 is formed by enclosing the partition wall 160 close to the air inlet 124 and the inner wall of the cavity-type wall 120, and each partition wall 160 is provided with an airflow hole 161 along the airflow direction, namely, the biomass combustible gas entering the first chamber 170 flows to the biomass gas combustion chamber 130 through the airflow hole 161 on the partition wall 160 close to the air inlet 124 after being ignited, while the flue gas generated by the biomass gas combustion chamber 130 flows to the flue gas low-nitrogen combustion control chamber 140 through the airflow hole 161 on the partition wall 160 close to the air outlet 125, while the flue gas generated by the flue gas low-nitrogen combustion control chamber 140 flows to the flue gas recycling chamber 150 through the airflow hole 161 on the partition wall 160 close to the air outlet 125;
a flow channel 162 is arranged on the lee side of each partition wall 160;
a flow passage 162 on the partition wall 160 close to the air inlet 124 is communicated with the air supplementing opening;
a flow passage 162 on the partition wall 160 near the air outlet 125 is communicated with the chamber connection pipe 110;
the flow channel 162 in the middle partition 160 communicates with the refill port.
Example 4
As shown in fig. 3 to 7, the present embodiment is a further improvement on embodiment 3, and specifically includes the following steps:
the partition walls 160 are constructed by a plurality of combined bricks 163 in a multi-layer manner, and each combined brick 163 is provided with an air flow hole 161; flow channels 162 are formed between two adjacent layers of the combined bricks 163, and in the building process, plugging materials are filled between two adjacent layers of the combined bricks 163 along the wind surface of the partition wall 160, namely, single-side plugging is realized, so that the flow channels 162 are formed on the leeward surface.
Example 5
As shown in fig. 3 to 7, this embodiment is a further improvement on embodiment 3 or 4, and specifically includes the following steps:
an air supply pipe 180 is arranged in the air supply opening; a material supplementing pipe 190 is arranged in the material supplementing opening.
Example 6
As shown in fig. 3 to 7, this embodiment is a further improvement on embodiment 3, 4 or 5, and specifically includes the following steps:
the number of the flow channels 162 on the partition wall 160 is nine, and the number of the corresponding air supply ports and the corresponding material supply ports is also nine, although the number of the flow channels 162 on the partition wall 160 may be other numbers, which is specifically determined by the number of the layers of the combination bricks 163.
Example 7
As shown in fig. 3 to 8, this embodiment is a further improvement on embodiment 6, and specifically includes the following steps:
the outer contour of each combination brick 163 is in the shape of a regular octagonal column.
Furthermore, each of the combination bricks 163 is formed by oppositely combining two identical special-shaped refractory bricks 1631, each of the special-shaped refractory bricks 1631 is provided with a concave cavity, and the concave cavities on the two identical special-shaped refractory bricks 1631 after being oppositely combined form the airflow holes 161.
Example 8
As shown in fig. 3 to 7, this embodiment is a further improvement on any embodiment of embodiments 1 to 7, and specifically includes the following steps:
explosion-proof openings 122 are formed in the positions, corresponding to the biomass gas combustion cavity 130 and the flue gas low-nitrogen combustion control cavity 140, of the cavity type wall body 120, so that the operation safety is guaranteed.
Example 9
As shown in fig. 3 to 7, the present embodiment is a further improvement on any one of embodiments 1 to 8, and specifically includes the following steps:
the bottom of cavity formula wall body 120 all sets up deashing mouth 123 in corresponding living beings gas combustion chamber 130, the low nitrogen burning control chamber of flue gas 140 and flue gas retrieval and utilization chamber 150 departments for the ash content impurity smugglied secretly among the clearance combustion chamber 1 biomass feedstock and the combustion process during the overhaul of the equipments guarantees the high-efficient burning of living beings gas.
In any of embodiments 1 to 9, the cavity wall 120 has a refractory brick as an inner layer and a heat insulating brick as an outer layer.
Example 10
As shown in fig. 1 to 8, a biomass gasification system includes a biomass gasification furnace 5, a waste heat boiler 2, an economizer 3, an induced draft fan 4 and a combustion chamber 1; the biomass gasification furnace 5, the combustion chamber 1, the waste heat boiler 2, the economizer 3 and the draught fan 4 are sequentially communicated along the air flow direction, namely, the draught fan 4 is started to enable the combustion chamber 1 to be in a negative pressure state, so that the biomass combustible gas generated by the biomass gasification furnace 5 can conveniently enter the combustion chamber 1.
The biomass is straw compressed particles, wood compressed particles, coconut shells, apricot shells, wood chippings and the like, and the biomass combustible gas comprises carbon monoxide, hydrogen, methane and tar.
A biomass gasification method comprises a biomass gasification system and comprises the following steps:
s100, open fire is arranged at the ignition port 121 before the biomass gasification furnace 5 is ignited to generate gas, wherein the open fire generation mode can be as follows: stacking the stack at the ignition port 121 with dry charcoal or firewood and igniting to maintain the stack in a burning flame state;
s200, the biomass gasification furnace 5 generates biomass combustible gas, and the biomass combustible gas enters the combustion chamber 1 to be combusted when meeting open fireBurning to enable biomass combustible gas to enter the biomass gas burning cavity 130 for full burning, supplying air to the biomass gas burning cavity 130 through the air supply pipe 180 in the burning process, and adjusting air supply quantity according to the flow quantity of the biomass gas to enable the biomass gas to be fully burned, wherein under the action, a plurality of flames are formed in the burning chamber 1, the temperature can reach 1000-1400 ℃, and light tar is completely volatilized and burnt under the action of high temperature of 1000-1400 ℃; the biomass tar is mainly benzene derivatives, such as benzene, naphthalene, toluene, xylene, etc., and also has difficultly-treated macromolecular aromatic substances, and the benzene derivatives can be decomposed into CHi and C under high-temperature environment2H, HCC0 high reactive free radical, CHi, C2H, HCC0 and NO produced in the combustion process of fuel gas undergo reduction reaction, reduce the generating amount of NO, when the heterotypic firebrick of the combustion chamber of the biomass gas turns into the red hot state, at this moment, the temperature of heterotypic firebrick reaches above 900 ℃, seal the burner port 121 with the refractory material, even the gas production of the gasification furnace 5 of the bionass fluctuates after that will not influence the gas produced to burn in the combustion chamber 1, thus guarantee the continuous operation of production;
s300, enabling the flue gas generated by the biomass gas combustion cavity 130 to flow to the flue gas low-nitrogen combustion control cavity 140, and conveying ammonia water or urea for reducing nitrogen oxides to the flue gas low-nitrogen combustion control cavity 140 through the material supplementing pipe 190;
s400, the flue gas in the economizer 3 is sprayed back into the flue gas recycling cavity 150 through the cavity connecting pipe 110 to adjust the temperature and the oxygen content of the combustion chamber 1, so that the effect of reducing the content of nitrogen oxides in the flue gas is achieved.
Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.
Claims (10)
1. The combustion chamber is characterized by comprising a chamber connecting pipe (110) and a cavity type wall body (120), wherein the cavity type wall body (120) is provided with an air inlet (124) and an air outlet (125), and a biomass gas combustion chamber (130), a flue gas low-nitrogen combustion control chamber (140) and a flue gas recycling chamber (150) which are sequentially communicated are arranged in the cavity type wall body (120) along the air flow direction; an air supply port communicated with the biomass gas combustion cavity (130) is arranged on the cavity type wall body (120); a feeding port communicated with the smoke low-nitrogen combustion control cavity (140) is formed in the cavity type wall body (120), and ammonia water or urea is conveyed into the smoke low-nitrogen combustion control cavity (140) through the feeding port; two ends of the chamber connecting pipe (110) are respectively communicated with the flue gas outlet of the economizer (3) and the flue gas recycling chamber (150).
2. A combustion chamber according to claim 1, characterized in that the cavity wall (120) has a first cavity (170) between the air inlet (124) and the biomass gas combustion chamber (130), and the cavity wall (120) is provided with a fire-inducing opening (121) at the corresponding first cavity (170).
3. The combustion chamber as claimed in claim 1, wherein three partition walls (160) are sequentially arranged in the hollow cavity wall body (120) along the airflow direction to divide a biomass gas combustion chamber (130), a flue gas low-nitrogen combustion control chamber (140) and a flue gas recycling chamber (150) in the hollow cavity wall body; each partition wall (160) is provided with an airflow hole (161) along the airflow direction; a flow channel (162) is arranged on the leeward surface of each partition wall (160); a flow channel (162) on a partition wall (160) close to the air inlet (124) is communicated with an air supplementing opening; a flow passage (162) on the partition wall (160) close to the air outlet (125) is communicated with the chamber connecting pipe (110); the flow channel (162) on the middle partition wall (160) is communicated with the feed opening.
4. A combustion chamber according to claim 3, characterized in that the partition walls (160) are constructed by a plurality of combined bricks (163) in a multi-layer manner, each combined brick (163) having air flow holes (161); and plugging materials are filled between partial two adjacent layers of combined bricks (163) along the wind surface of the partition wall (160) to realize single-side plugging so as to form a flow channel (162) on the leeward surface.
5. A combustion chamber according to claim 3, characterized in that an air supply duct (180) is arranged in the air supply opening; and a material supplementing pipe (190) is arranged in the material supplementing opening.
6. A combustion chamber as claimed in claim 4, characterized in that said partition (160) has nine flow passages (162); the quantity of the air supply ports and the quantity of the material supply ports are nine.
7. A combustion chamber according to claim 4, characterized in that the outer contour of each modular brick (163) is in the shape of a regular octagonal cylinder.
8. A combustion chamber according to claim 7, characterized in that each modular brick (163) is composed of two identical profiled refractory bricks (1631) assembled in opposition.
9. The combustion chamber as claimed in claim 1, wherein the cavity-type wall (120) is provided with an explosion-proof opening (122) at the position corresponding to the biomass gas combustion chamber (130) and the flue gas low-nitrogen combustion control chamber (140).
10. A biomass gasification system is characterized by comprising a biomass gasification furnace (5), a waste heat boiler (2), an economizer (3), an induced draft fan (4) and the combustion chamber (1) as claimed in any one of claims 1 to 9; the biomass gasification furnace (5), the combustion chamber (1), the waste heat boiler (2), the economizer (3) and the induced draft fan (4) are sequentially communicated along the air flow direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121270902.9U CN215209265U (en) | 2021-06-08 | 2021-06-08 | Combustion chamber and biomass gasification system comprising same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121270902.9U CN215209265U (en) | 2021-06-08 | 2021-06-08 | Combustion chamber and biomass gasification system comprising same |
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| Publication Number | Publication Date |
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| CN215209265U true CN215209265U (en) | 2021-12-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN202121270902.9U Active CN215209265U (en) | 2021-06-08 | 2021-06-08 | Combustion chamber and biomass gasification system comprising same |
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- 2021-06-08 CN CN202121270902.9U patent/CN215209265U/en active Active
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