CN218936402U - Low-load operation air quantity control assembly of coal-fired boiler - Google Patents
Low-load operation air quantity control assembly of coal-fired boiler Download PDFInfo
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- CN218936402U CN218936402U CN202223516151.1U CN202223516151U CN218936402U CN 218936402 U CN218936402 U CN 218936402U CN 202223516151 U CN202223516151 U CN 202223516151U CN 218936402 U CN218936402 U CN 218936402U
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Abstract
The utility model discloses a low-load operation air quantity control assembly of a coal-fired boiler, which comprises a boiler furnace (1), wherein a primary air inlet (2) is arranged at the bottom of the boiler furnace (1), secondary air inlets (3) are arranged at the left side and the right side of the middle part of the boiler furnace (1), and a smoke outlet (11) is arranged at one side of the top of the boiler furnace (1). The utility model has the characteristic of effectively controlling the environmental protection of the smoke emission in the low-load running state.
Description
Technical Field
The utility model relates to a coal-fired boiler, in particular to a low-load operation air quantity control assembly of the coal-fired boiler.
Background
The boiler is a water container heated on fire, the boiler is a place where fuel is burned, and the boiler comprises two parts of a boiler and a boiler. The boiler is an energy conversion device, the energy input to the boiler is chemical energy and electric energy in fuel, and the boiler outputs steam, high temperature water or organic heat carrier with certain heat energy. The hot water or steam generated in the boiler can directly provide heat energy required by industrial production and people living, and can also be converted into mechanical energy through a steam power device or converted into electric energy through a generator. Because the electricity consumption of different time periods every day is different, the daytime is in a peak state, the evening is in an electricity consumption low valley period, and the boiler of the thermal power plant usually adopts a low-load running state in the electricity consumption low valley period, at the moment, the bed temperature of the boiler is lower, the running is unstable, and the environmental protection index of the discharged smoke is difficult to control. Therefore, the prior art has the problem that the environmental protection index of the smoke emission is difficult to control in the low-load running state.
Disclosure of Invention
The utility model aims to provide a low-load operation air quantity control assembly of a coal-fired boiler. The utility model has the characteristic of effectively controlling the environmental protection of the smoke emission in the low-load running state.
The technical scheme of the utility model is as follows: the low-load operation air quantity control assembly of the coal-fired boiler comprises a boiler furnace, wherein a primary air inlet is arranged at the bottom of the boiler furnace, secondary air inlets are arranged on the left side and the right side of the middle of the boiler furnace, and a smoke outlet is arranged on one side of the top of the boiler furnace.
In the low-load operation air quantity control assembly of the coal-fired boiler, a square air pipe is arranged at the outer side of the secondary air inlet at the left side, and an air direction adjusting assembly is arranged in the square air pipe; the wind direction adjusting assembly comprises a rotary wind adjusting grille fixed in the square air pipe, and a rotary shaft of the rotary wind adjusting grille is connected with a rotary driving mechanism positioned at the outer side of the square air pipe.
In the low-load operation air quantity control assembly of the coal-fired boiler, the upper surface and the lower surface of the rotary air regulation grid are respectively provided with Y-shaped turbulence ribs and S-shaped turbulence ribs which are distributed in a crossed mode.
In the low-load operation air quantity control assembly of the coal-fired boiler, a communication channel is further arranged between the smoke outlet and the lower part of the boiler furnace, and a sealing valve is arranged on the communication channel.
Compared with the prior art, the secondary air inlets are additionally arranged in the middle parts of the left side and the right side of the boiler hearth, so that swirling air flow is formed in the hearth, the combustion time of materials in the hearth is increased, and on one hand, the materials can be fully combusted, and chemical heat loss is reduced; on the other hand, the materials are fully combusted, so that large-particle substances are reduced, small-particle substances are increased, and small particles are taken away by flue gas, so that the material returning quantity is reduced, the bed temperature is improved, and the environment-friendly emission index is ensured to be qualified. In addition, set up square tuber pipe in the outside of overgrate air entry to set up direction adjustment subassembly in square tuber pipe, be convenient for adjust the wind direction of overgrate air, enlarge the region of whirling air current, make the material can more abundant burning. In conclusion, the utility model has the characteristic of effectively controlling the environmental protection of the smoke emission in the low-load running state.
Drawings
FIG. 1 is a structural view of the present utility model;
FIG. 2 is an exterior view of a square air duct;
FIG. 3 is an interior view of a square air duct;
fig. 4 is a structural view of a rotary air-conditioning grill.
The marks in the drawings are: the boiler comprises a boiler furnace, a primary air inlet, a secondary air inlet, a smoke outlet, a square air pipe, a rotary air adjusting grid, a rotary driving mechanism, a Y-shaped vortex rib, an S-shaped vortex rib, a 9-communicated channel and a sealing valve.
Detailed Description
The utility model is further illustrated by the following figures and examples, which are not intended to be limiting.
Examples. The low-load operation air quantity control assembly of the coal-fired boiler is shown in figures 1-4, and is characterized in that: the boiler comprises a boiler furnace 1, a primary air inlet 2 is arranged at the bottom of the boiler furnace 1, secondary air inlets 3 are arranged on the left side and the right side of the middle of the boiler furnace 1, and a smoke outlet 11 is arranged on one side of the top of the boiler furnace 1.
A square air pipe 4 is arranged at the outer side of the secondary air inlet 3 at the left side, and a wind direction adjusting component is arranged in the square air pipe 4; the wind direction adjusting assembly comprises a rotary air adjusting grating 5 fixed in the square air pipe 4, and a rotary driving mechanism 6 positioned outside the square air pipe 4 is connected with a rotary shaft of the rotary air adjusting grating 5.
The upper surface and the lower surface of the rotary air adjusting grid 5 are respectively provided with Y-shaped turbulence ribs 7 and S-shaped turbulence ribs 8 which are distributed in a crossed mode.
A communication channel 9 is also arranged between the smoke outlet 3 and the lower part of the boiler furnace 1, and a sealing valve 10 is arranged on the communication channel 9.
Preferably, the number of the rotary air-regulating grids is multiple, and the rotary air-regulating grids are vertically distributed.
The rotary driving mechanism comprises a rotary motor, a driving gear is arranged at the output end of the rotary motor, a driven gear is arranged at one end of each rotary air grid regulating rotary shaft, a transmission chain is arranged between the driven gear and the driving gear, and the rotary air grid regulating rotary shaft is driven to rotate through the transmission of the transmission chain.
Through set up Y type vortex rib and S type vortex rib at the upper and lower surface of left rotation formula air regulation grid, can carry out the vortex of equidirectional to the overgrate air for the gas distribution that circles round is more even, and the time is also longer.
The secondary air inlet is positioned above the combustion center of the boiler furnace.
When the boiler is in a low-load running state, the air quantity of the primary air inlet is reduced, so that the combustion center in the hearth moves downwards, and the bed temperature is increased; meanwhile, secondary air enters from secondary air inlets at two sides of the hearth, a cyclone air flow is formed in the hearth, the combustion time of materials in the hearth is increased, and on one hand, the materials can be fully combusted to reduce chemical heat loss; on the other hand, the materials are fully combusted, so that large-particle substances are reduced, small-particle substances are increased, small-particle substances are taken away by flue gas, the material returning quantity is reduced, the bed temperature is improved, and the environmental protection performance of flue gas emission of the boiler in a low-load running state can be effectively controlled. In the process, the rotary air-regulating grille sweeps air in a certain area under the driving action of the rotary driving mechanism, so that the area of the rotary air flow can be enlarged, and the material combustion time can be prolonged.
Claims (4)
1. The low-load operation air quantity control assembly of the coal-fired boiler is characterized in that: the boiler comprises a boiler furnace (1), wherein a primary air inlet (2) is formed in the bottom of the boiler furnace (1), secondary air inlets (3) are formed in the left side and the right side of the middle of the boiler furnace (1), and a smoke outlet (11) is formed in one side of the top of the boiler furnace (1).
2. The coal-fired boiler low load operation air volume control assembly according to claim 1, wherein: a square air pipe (4) is arranged at the outer side of the secondary air inlet (3) at the left side, and a wind direction adjusting component is arranged in the square air pipe (4); the wind direction adjusting assembly comprises a rotary air adjusting grid (5) fixed in the square air pipe (4), and a rotary driving mechanism (6) positioned on the outer side of the square air pipe (4) is connected with a rotary shaft of the rotary air adjusting grid (5).
3. The coal-fired boiler low load operation air volume control assembly according to claim 2, wherein: the upper surface and the lower surface of the rotary type air regulation grid (5) are respectively provided with Y-shaped turbulence ribs (7) and S-shaped turbulence ribs (8) which are distributed in a crossed manner.
4. The coal-fired boiler low load operation air volume control assembly according to claim 1, wherein: a communication channel (9) is further arranged between the smoke outlet (11) and the lower part of the boiler hearth (1), and a sealing valve (10) is arranged on the communication channel (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223516151.1U CN218936402U (en) | 2022-12-28 | 2022-12-28 | Low-load operation air quantity control assembly of coal-fired boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223516151.1U CN218936402U (en) | 2022-12-28 | 2022-12-28 | Low-load operation air quantity control assembly of coal-fired boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218936402U true CN218936402U (en) | 2023-04-28 |
Family
ID=86065193
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223516151.1U Active CN218936402U (en) | 2022-12-28 | 2022-12-28 | Low-load operation air quantity control assembly of coal-fired boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218936402U (en) |
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2022
- 2022-12-28 CN CN202223516151.1U patent/CN218936402U/en active Active
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