CN211260947U - Rural straw bundle burning direct-fired heat supply system - Google Patents
Rural straw bundle burning direct-fired heat supply system Download PDFInfo
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- CN211260947U CN211260947U CN201922422097.6U CN201922422097U CN211260947U CN 211260947 U CN211260947 U CN 211260947U CN 201922422097 U CN201922422097 U CN 201922422097U CN 211260947 U CN211260947 U CN 211260947U
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- fired
- fired boiler
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- 239000010902 straw Substances 0.000 title claims abstract description 73
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 37
- 239000000428 dust Substances 0.000 claims abstract description 22
- 238000010438 heat treatment Methods 0.000 claims abstract description 17
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000003546 flue gas Substances 0.000 claims abstract description 11
- 239000000446 fuel Substances 0.000 claims abstract description 11
- 239000008236 heating water Substances 0.000 claims abstract description 7
- 239000002912 waste gas Substances 0.000 claims abstract description 4
- 230000001502 supplementing effect Effects 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 238000002485 combustion reaction Methods 0.000 abstract description 6
- 239000002028 Biomass Substances 0.000 abstract description 5
- 238000003912 environmental pollution Methods 0.000 abstract description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 6
- 241000196324 Embryophyta Species 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 240000008042 Zea mays Species 0.000 description 1
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 description 1
- 235000002017 Zea mays subsp mays Nutrition 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 235000005822 corn Nutrition 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000003306 harvesting Methods 0.000 description 1
Images
Abstract
The utility model relates to a biomass boiler heat supply technical field relates to a rural straw bundle burns direct combustion heating system particularly. The straw bundle fuel feeding device comprises an automatic feeding device, a straw direct-fired boiler, a dust removal device, a denitration device, a spiral conveying device, a plate heat exchanger and heating equipment, wherein a fuel inlet of the boiler is the automatic feeding device, straw bundle fuel with the feeding size of 350 multiplied by 450 multiplied by 650 is fed, and an air blower is arranged at an air inlet of the boiler; a spiral conveying device is installed at an ash outlet of the boiler, a denitration device is directly connected with a hearth through a pipeline, and a waste gas outlet of the straw direct-fired boiler is connected with a dust removal device and a chimney; the hot water of the straw direct-fired boiler exchanges heat through the plate heat exchanger to heat the heating water. The utility model discloses can make agricultural straw obtain abundant utilization, reduce the straw and stack or burn the harm to atmospheric environment, oxynitride's emission in the reducible flue gas of denitrification facility, fundamentally solves the straw and leaks the environmental pollution problem and the comprehensive utilization problem that the sky burns and lead to and improve its use value.
Description
Technical Field
The utility model relates to a biomass boiler heat supply technical field relates to a rural straw bundle burns direct combustion heating system particularly.
Background
The biomass resources in China are rich, the annual output of crop straws is 7 hundred million tons, which accounts for about 30 percent of the total straw output in the world, and the annual output is 3 hundred million tons in comparison with standard coal, about half of the annual output can be used as biomass energy, which means that the crop straw resources have huge utilization potential. At present, the corn straws in rural areas are generally stacked in the field after autumn harvest and are treated in an incineration mode after being dried by the wind, so that precious resources are wasted, and the environment is seriously polluted. If the crop straws abandoned on the field are collected for heat supply in nearby rural areas, the problem of environmental pollution and comprehensive utilization caused by straw burning in a missing day are fundamentally solved, and the use value of the straw is improved. At present, when the straws are used as boiler fuel, the straws must be processed by a mechanism to produce granular or blocky biomass fuel, so that the electricity cost, the processing cost and the transportation cost are increased, and the cost of the straws exceeds the cost of fire coal.
Disclosure of Invention
The utility model aims at providing a rural straw bundle burns direct combustion heating system with low costs.
The utility model comprises an automatic feeding device, a straw direct-fired boiler, a dust removal device, a denitration device, a spiral conveying device, a plate heat exchanger and a heating device, wherein the fuel inlet of the straw direct-fired boiler is the automatic feeding device, the automatic feeding device can uniformly convey straw bundle fuel with the external dimension of 350 multiplied by 450 multiplied by 650 to a furnace chamber of the straw direct-fired boiler, and an air blower is arranged at the air inlet of the straw direct-fired boiler; the spiral conveying device is arranged at an ash outlet of the straw direct-fired boiler, and can convey plant ash generated by the straw bundle after being burnt in a hearth of the straw direct-fired boiler to an ash conveying vehicle; the denitration device is directly connected with the hearth through a pipeline, and can spray a denitration agent into the hearth, so that the emission of nitrogen oxides in the flue gas is reduced; an inlet of the dust removal device is connected with a waste gas outlet of the straw direct-fired boiler through a flue gas pipeline; the outlet of the dust removal device is connected with the inlet of an induced draft fan through a flue gas pipeline, and the outlet of the induced draft fan is connected with a chimney; the heat supply device comprises a one-net circulating pump, a two-net circulating pump, a plate heat exchanger, a constant-pressure water supplementing device, a pipeline valve and the like, wherein a water outlet and a water return port of the straw direct-fired boiler are respectively connected with a high-temperature medium inlet and a high-temperature medium outlet of the plate heat exchanger, and a heating water outlet and a water return port of the heat supply equipment are respectively connected with a low-temperature medium inlet and a low-temperature medium outlet of the plate heat exchanger; circulating pumps and valves are arranged in the high-temperature medium circulating pipeline and the low-temperature medium circulating pipeline, a constant-pressure water supplementing device is arranged on the heating water return pipeline in the low-temperature medium circulating pipeline, and water is timely supplemented to the system when water leakage occurs in the circulating water system.
The straw direct-fired boiler is a normal-pressure chain grate horizontal single-drum boiler.
The air blower and the induced draft fan are controlled by frequency conversion.
The dust removal device is a multi-tube dust removal and pulse bag dust removal device.
The denitration device is an SNCR denitration device.
As a preferred embodiment, the automatic water supply device further comprises a local control cabinet, wherein a motor switch for controlling the air blower, the draught fan, the first-network circulating pump and the second-network circulating pump and a control switch for controlling the automatic feeding device, the bolt conveying device and the constant-pressure water replenishing device are arranged on the local control cabinet.
The crop straws are bundled by the bundling machine for the farmers and then transported to a heat supply station for storage and the like for heating in winter. The straw bundles are fed into a boiler furnace through an automatic feeding device, the straw bundles are combusted in the furnace to heat circulating water for heating, and flue gas is purified by a dust removal device and then discharged into the atmosphere.
Compared with the prior art, the utility model has the advantages that:
the utility model discloses can make agricultural straw obtain abundant utilization, reduce the straw and stack or burn to atmospheric environment's harm, make full use of renewable energy's advantage, fundamentally solves the straw and leaks the environmental pollution problem and the comprehensive utilization problem that the sky burns and lead to and improve its use value.
Drawings
The present invention will be further explained with reference to the drawings and examples.
Fig. 1 is a process flow diagram of the present invention.
In the figure: the method comprises the following steps of 1-automatic feeding device, 2-straw direct-fired boiler, 3-dust removal device, 4-screw conveyor, 5-blower, 6-induced draft fan, 7-chimney, 8-local control cabinet, 9-one-network circulating pump, 10-plate heat exchanger, 11-two-network circulating pump, 12-constant pressure water replenishing device, 13-ash conveying vehicle and 14-denitration device.
Detailed Description
As shown in the figure, the utility model comprises an automatic feeding device 1, a straw direct-fired boiler 2, a dust removing device 3, a denitration device 14, a spiral conveying device 4, a plate heat exchanger 10 and a heating device, wherein the fuel inlet of the straw direct-fired boiler 2 is the automatic feeding device 1, the automatic feeding device 1 can uniformly convey the straw bundle fuel with the external dimension of 350 x 450 x 650 to the hearth of the straw direct-fired boiler 2, and an air blower 5 is arranged at the air inlet of the straw direct-fired boiler 2; the spiral conveying device 4 is arranged at an ash outlet of the straw direct-fired boiler 2, and the spiral conveying device 4 can convey plant ash generated by the straw bundled in a hearth of the straw direct-fired boiler after combustion to an ash conveying vehicle 13; the denitration device 14 is directly connected with the hearth through a pipeline, and can spray a denitration agent into the hearth, so that the emission of nitrogen oxides in the flue gas is reduced; (ii) a An inlet of the dust removal device 3 is connected with a waste gas outlet of the straw direct-fired boiler 2 through a flue gas pipeline; the outlet is connected with the inlet of an induced draft fan 6 through a flue gas pipeline, and the outlet of the induced draft fan is connected with a chimney 7; the heating device comprises a one-net circulating pump 9, a two-net circulating pump 11, a plate heat exchanger 10, a constant-pressure water supplementing device 12, a pipeline valve and the like, a water outlet and a water return port of the straw direct-fired boiler 2 are respectively connected with a high-temperature medium inlet and a high-temperature medium outlet of the plate heat exchanger 10, and a heating water outlet and a water return port of the heating device are respectively connected with a low-temperature medium inlet and a low-temperature medium outlet of the plate heat exchanger 10; circulating pumps (a network circulating pump 9 and a two network circulating pump 11) and valves are arranged in the high-temperature medium circulating pipeline and the low-temperature medium circulating pipeline, a constant-pressure water supplementing device 12 is arranged on the heating water return pipeline in the low-temperature medium circulating pipeline, and water is supplemented into the system in time when water leakage occurs in the circulating water system.
The straw direct-fired boiler 2 is a normal-pressure chain grate horizontal single-drum boiler.
The air blower 5 and the induced draft fan 6 are controlled by frequency conversion.
The dust removing device 3 is a multi-tube dust removing and pulse bag dust removing device.
The denitration device 14 is an SNCR denitration device.
As a preferred embodiment, the automatic feeding device further comprises a local control cabinet 8, wherein motor switches for controlling the air blower 5, the induced draft fan 6, the first-network circulating pump 9 and the second-network circulating pump 11 are arranged on the local control cabinet 8, and control switches for controlling the automatic feeding device 1, the bolt conveying device 4 and the constant-pressure water replenishing device 12 are further arranged on the local control cabinet 8.
The crop straws are bundled by the bundling machine for the farmers and then transported to a heat supply station for storage and the like for heating in winter. Straw bundles are uniformly fed into a hearth of a straw direct-fired boiler 2 through an automatic feeding device 1, heat generated after straw combustion heats first-network circulating water, the first-network circulating water transfers the heat to second-network circulating water through a plate heat exchanger 10, and the second-network circulating water supplies heat to farmers in villages. The constant-pressure water replenishing device 12 can adjust the expansion and contraction of the two-network circulating water caused by temperature fluctuation, so that the pressure of the two-network circulating water system is constant, and water is timely replenished into the system when water leakage occurs in the two-network circulating water system. Flue gas generated after straw combustion is purified by the dust removal device 3 and the denitration device 14 and is discharged into the atmosphere through the induced draft fan 6 and the chimney 7. The residual plant ash after the straw is burnt falls into the spiral conveying device 4, the spiral conveying device is started periodically to convey the plant ash to the ash conveying vehicle 13, and then the plant ash is recycled.
Claims (6)
1. A rural straw bundle burning direct-fired heat supply system is characterized by comprising an automatic feeding device, a straw direct-fired boiler, a dust removal device, a denitration device, a spiral conveying device, a plate type heat exchanger and heat supply equipment, wherein a fuel inlet of the straw direct-fired boiler is the automatic feeding device, the automatic feeding device can uniformly convey straw bundle fuel with the external dimension of 350 multiplied by 450 multiplied by 650 to a hearth of the straw direct-fired boiler, and an air blower is arranged at an air inlet of the straw direct-fired boiler; a spiral conveying device is arranged at an ash outlet of the straw direct-fired boiler; the denitration device is directly connected with the hearth through a pipeline; an inlet of the dust removal device is connected with a waste gas outlet of the straw direct-fired boiler through a flue gas pipeline; the outlet of the dust removal device is connected with the inlet of an induced draft fan through a flue gas pipeline, and the outlet of the induced draft fan is connected with a chimney; a water outlet and a water return port of the straw direct-fired boiler are respectively connected with a high-temperature medium inlet and a high-temperature medium outlet of the plate heat exchanger, and a heating water outlet and a water return port of the heating equipment are respectively connected with a low-temperature medium inlet and a low-temperature medium outlet of the plate heat exchanger; circulating pumps and valves are arranged in the high-temperature medium circulating pipeline and the low-temperature medium circulating pipeline, and a constant-pressure water supplementing device is arranged on the heating water return pipeline in the low-temperature medium circulating pipeline.
2. The rural straw bundle burning direct-fired heating system according to claim 1, characterized in that the straw direct-fired boiler is a normal-pressure chain grate horizontal single-drum boiler.
3. The rural straw bundle burning direct-fired heating system according to claim 1, wherein the air blower and the induced draft fan are controlled by frequency conversion.
4. The rural straw bundle burning direct-fired heating system according to claim 1, wherein the dust removal device is a multi-tube dust removal and pulse bag dust removal device.
5. The rural straw bundle burning direct-fired heating system of claim 1, wherein the denitrification facility is an SNCR denitrification facility.
6. The rural straw bundle burning direct-fired heating system according to claim 1, further comprising a local control cabinet, wherein the local control cabinet is provided with a motor switch for controlling an air blower, an induced draft fan, a one-net circulating pump and a two-net circulating pump, and a control switch for controlling an automatic feeding device, a bolt conveying device and a constant pressure water replenishing device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922422097.6U CN211260947U (en) | 2019-12-30 | 2019-12-30 | Rural straw bundle burning direct-fired heat supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922422097.6U CN211260947U (en) | 2019-12-30 | 2019-12-30 | Rural straw bundle burning direct-fired heat supply system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211260947U true CN211260947U (en) | 2020-08-14 |
Family
ID=71957623
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922422097.6U Active CN211260947U (en) | 2019-12-30 | 2019-12-30 | Rural straw bundle burning direct-fired heat supply system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211260947U (en) |
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2019
- 2019-12-30 CN CN201922422097.6U patent/CN211260947U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A rural straw bale burning direct combustion heating system Effective date of registration: 20220629 Granted publication date: 20200814 Pledgee: Agricultural Bank of China Limited Changzhi Shangdang sub branch Pledgor: SHANXI YITONG ENVIRONMENTAL ENERGY TECHNOLOGY GROUP Co.,Ltd. Registration number: Y2022140000033 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Granted publication date: 20200814 Pledgee: Agricultural Bank of China Limited Changzhi Shangdang sub branch Pledgor: SHANXI YITONG ENVIRONMENTAL ENERGY TECHNOLOGY GROUP Co.,Ltd. Registration number: Y2022140000033 |