CN102748769A - Biomass fuel vertical rotating bin feeding process with preheating system - Google Patents
Biomass fuel vertical rotating bin feeding process with preheating system Download PDFInfo
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- CN102748769A CN102748769A CN2012101315160A CN201210131516A CN102748769A CN 102748769 A CN102748769 A CN 102748769A CN 2012101315160 A CN2012101315160 A CN 2012101315160A CN 201210131516 A CN201210131516 A CN 201210131516A CN 102748769 A CN102748769 A CN 102748769A
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- Prior art keywords
- boiler
- biomass fuel
- biomass
- fuel
- air
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- 239000002028 Biomass Substances 0.000 title claims abstract description 48
- 239000000446 fuel Substances 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 10
- 238000002485 combustion reaction Methods 0.000 claims abstract description 6
- 239000002131 composite material Substances 0.000 claims abstract description 5
- 239000000779 smoke Substances 0.000 claims abstract description 4
- 239000000203 mixture Substances 0.000 claims abstract 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 5
- 238000005516 engineering process Methods 0.000 claims 1
- 238000011084 recovery Methods 0.000 claims 1
- 239000000725 suspension Substances 0.000 claims 1
- 238000009834 vaporization Methods 0.000 abstract 1
- 230000008016 vaporization Effects 0.000 abstract 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 5
- 239000003546 flue gas Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 206010010904 Convulsion Diseases 0.000 description 1
- 230000036461 convulsion Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
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- Drying Of Solid Materials (AREA)
Abstract
The invention relates to a biomass fuel vertical rotating bin feeding process with a preheating system. The air is heated by a composite phase-change heat exchanger, boiler-fed biomass fuel is dried in a preheating type biomass fuel rotating bin by using the hot air, the rotating bin can mix the fuel and the hot air sufficiently, and the hot air can dry most external moisture in the biomass fuel so as to enable the external moisture of the boiler-fed biomass fuel to be controlled at about 20%. After the boiler-fed fuel is dried, boiler combustion efficiency is improved. The dried boiler-fed biomass fuel is fed in a boiler to be burned, latent heat of vaporization taken away by steam generated by combustion of the biomass fuel in the boiler can be reduced, heat loss because of smoke exhaust of the boiler can be further reduced, and biomass boiler heat efficiency is improved.
Description
Technical Field
The invention relates to an air heating drying furnace-entering biomass fuel, which can reduce the water content of the furnace-entering biomass fuel, reduce the heat loss of boiler exhaust smoke and improve the heat efficiency of a biomass boiler.
Background art:
biomass power generation is a new industry integrating energy conservation, environmental protection and 'three farmers' service. The development of the industry has positive promotion effects on improving atmospheric environment, improving resource utilization rate, optimizing energy structure and realizing sustainability of human energy. The water control of the biomass fuel entering the furnace is very important, and when the water content of the biomass fuel entering the furnace reaches more than 45 percent, the low-level heating value is only about 1500-1800 kcal/kg. The higher the water content of the biomass fuel is, the lower the actual utilization value of the biomass fuel is, because the biomass fuel has overlarge water content, the actual flue gas amount generated by combustion in the furnace is increased, so that the load of the induced draft fan is increased, the plant power consumption rate is increased, the heat in the furnace can be absorbed after the part of water enters the furnace, the part of water is converted into steam at about 150-170 ℃, and a large amount of heat is taken away when the steam is discharged along with the flue gas. The invention of the project can realize the utilization of waste heat, reduce the loss of heat energy discharged by flue gas, and has low investment and high efficiency.
The invention content is as follows:
the invention provides an integrated device for heating air by using a composite phase-change heat exchange air preheater and then conveying the heated air to a rotary biomass storage bin with a preheating function for drying, a post-treatment facility and the like for drying biomass fuel entering a furnace.
Vertical rotatory feed bin of system biomass fuel is preheated in area, and feed bin upper portion is equipped with feed inlet and exhaust apparatus, and the fuel after the lower part adopts the spiral to dry is carried to the boiler internal combustion, and the exhaust adopts draught fan negative pressure convulsions to arrange to the atmosphere the vapor that volatilizees among the biomass fuel stoving process. The rotary bin with the preheating type biomass fuel can be divided into two types: one is a biomass fuel vertical rotary bin with a preheating system, the middle of which is provided with an exhaust channel and the periphery of a circular wall is provided with a hot air channel; the other type is a biomass fuel vertical rotary bin with a preheating system, wherein the middle of the biomass fuel vertical rotary bin is provided with a hot air channel, and the periphery of the circular wall is provided with an exhaust channel.
Description of the drawings:
the attached drawing is a process flow chart and a schematic diagram of a rotary bin with preheating type biomass. Wherein,
FIG. 1 is a process flow diagram of a biomass fuel vertical rotary silo feeding process with a preheating system;
FIG. 2 is a schematic view of a biomass fuel vertical rotary bunker with a preheating system, wherein an exhaust channel is arranged in the middle of the vertical rotary bunker, and a hot air channel is arranged around a circular wall of the vertical rotary bunker;
in the middle of fig. 3, a hot air channel is arranged, and an exhaust channel is arranged around the circular wall, and the biomass fuel vertical rotary silo with the preheating system is schematically shown.
The specific implementation mode is as follows:
a composite phase change heat exchanger and an external air preheater are installed in a flue at the tail part of a boiler of a biomass power generation enterprise, air is heated and then conveyed to a rotary bin of a biomass boiler with a preheating type biomass fuel for drying, and the dried biomass fuel directly enters the boiler for combustion through a spiral conveying system.
The unit heat value of the dried biomass fuel is increased, the biomass fuel enters a boiler to be combusted, the volume of actual generated flue gas is reduced, the heat loss of boiler exhaust smoke is reduced, the efficiency of the boiler is improved, and meanwhile, the adhesion of fly ash to the heating surface of the boiler can be weakened after the volume of water vapor in the flue gas is reduced.
Claims (4)
- The device is an integrated device which is used for heating and drying the biomass fuel entering the boiler by air, can reduce the water content of the biomass fuel entering the boiler, reduces the heat loss of boiler exhaust smoke and improves the heat efficiency of the biomass boiler. The method comprises the following steps:1. the device comprises a composite phase change air heat exchanger device, an adjusting device, a rotary biomass storage bin device with a preheating function, an air recovery device, an exhaust device and the like. The method is characterized in that desalted water absorbs heat in a phase change section of a tail flue of a boiler and heats air to 60-70 ℃, heated hot air is sent into a preheating type rotary bin to be fully mixed with fuel entering the boiler, the biomass fuel is dried before entering the boiler, the dried fuel enters a hearth to be combusted, and moisture and air mixture separated out after the biomass fuel is dried is discharged into the atmosphere through an exhaust device.
- 2. A structural process of a biomass fuel vertical rotary bin with a preheating system.
- 3. The biomass boiler utilizes a technology of heating air by a composite phase-change heat exchange air preheater to dry biomass fuel in a biomass fuel rotating bin with preheating.
- 4. The invention is suitable for boilers (layer combustion type, fluidized bed and suspension type) for burning biomass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101315160A CN102748769A (en) | 2012-04-18 | 2012-04-18 | Biomass fuel vertical rotating bin feeding process with preheating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101315160A CN102748769A (en) | 2012-04-18 | 2012-04-18 | Biomass fuel vertical rotating bin feeding process with preheating system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102748769A true CN102748769A (en) | 2012-10-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012101315160A Pending CN102748769A (en) | 2012-04-18 | 2012-04-18 | Biomass fuel vertical rotating bin feeding process with preheating system |
Country Status (1)
| Country | Link |
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| CN (1) | CN102748769A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105925316A (en) * | 2016-07-07 | 2016-09-07 | 广州薪光合环保技术有限公司 | Control method of fluidized bed gasifier system |
| CN106247375A (en) * | 2016-08-30 | 2016-12-21 | 江苏太湖锅炉股份有限公司 | Single drum longitudinal biomass direct-fired chain-grate boiler system |
| CN107062287A (en) * | 2017-05-15 | 2017-08-18 | 江苏龙净科杰催化剂再生有限公司 | The residual heat using device of gas fired-boiler flue gas |
| CN114704848A (en) * | 2022-03-28 | 2022-07-05 | 西安热工研究院有限公司 | Coupling power generation system for drying biomass fuel by using low-temperature waste heat of thermal power generating unit |
-
2012
- 2012-04-18 CN CN2012101315160A patent/CN102748769A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105925316A (en) * | 2016-07-07 | 2016-09-07 | 广州薪光合环保技术有限公司 | Control method of fluidized bed gasifier system |
| CN106247375A (en) * | 2016-08-30 | 2016-12-21 | 江苏太湖锅炉股份有限公司 | Single drum longitudinal biomass direct-fired chain-grate boiler system |
| CN107062287A (en) * | 2017-05-15 | 2017-08-18 | 江苏龙净科杰催化剂再生有限公司 | The residual heat using device of gas fired-boiler flue gas |
| CN114704848A (en) * | 2022-03-28 | 2022-07-05 | 西安热工研究院有限公司 | Coupling power generation system for drying biomass fuel by using low-temperature waste heat of thermal power generating unit |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20121024 |
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| RJ01 | Rejection of invention patent application after publication |