CN102954678B - Utilize method and the device thereof of biomass boiler flue gas drying biomass material - Google Patents
Utilize method and the device thereof of biomass boiler flue gas drying biomass material Download PDFInfo
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- CN102954678B CN102954678B CN201210442674.8A CN201210442674A CN102954678B CN 102954678 B CN102954678 B CN 102954678B CN 201210442674 A CN201210442674 A CN 201210442674A CN 102954678 B CN102954678 B CN 102954678B
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- flue gas
- hothouse
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B23/00—Heating arrangements
- F26B23/02—Heating arrangements using combustion heating
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B17/00—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement
- F26B17/02—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by belts carrying the materials; with movement performed by belts or elements attached to endless belts or chains propelling the materials over stationary surfaces
- F26B17/04—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed by belts carrying the materials; with movement performed by belts or elements attached to endless belts or chains propelling the materials over stationary surfaces the belts being all horizontal or slightly inclined
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/14—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects using gases or vapours other than air or steam, e.g. inert gases
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B2200/00—Drying processes and machines for solid materials characterised by the specific requirements of the drying good
- F26B2200/02—Biomass, e.g. waste vegetative matter, straw
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Drying Of Solid Materials (AREA)
- Solid Fuels And Fuel-Associated Substances (AREA)
Abstract
The invention discloses a kind of method and the device thereof that utilize biomass boiler flue gas drying biomass material.Biomass material imports on the crawler-tread machine in hothouse by the method, carries out dynamic transmission, and introduces and carry out contact heat-exchanging through the biomass boiler flue gas of dust removal process and biomass material, thus removes the part moisture content in biomass material; Flue gas after heat exchange re-starts dust removal process, the biomass material of drying then can directly as biomass boiler fuel or store for subsequent use.The smoke circulating system that its device is formed primarily of deduster, hothouse, booster fan, air-introduced machine etc. and being arranged in hothouse combines for the crawler-tread machine of biomass material conveying.Structure of the present invention is simple, process economics, drying effect are good, effectively can reduce the size of biomass boiler system, significantly improve the thermal efficiency of biomass boiler system.
Description
Technical field
The present invention relates to boiler afterheat to utilize and energy-conserving and emission-cutting technology, refer to a kind of method and the device thereof that utilize biomass boiler flue gas drying biomass material particularly.
Background technology
Along with the minimizing day by day of the reserves such as traditional fossil energy coal, oil, natural gas, and the survival and development owing to using the problem of environmental pollution that brings of fossil energy directly to threaten the mankind, pay attention to and develop the common objective that the reproducible environment-friendly type energy has become national governments.Living beings are organic substances that plant is generated by photosynthesis, it is widely distributed, amount usable greatly, comparatively fossil energy clean, having the feature of carbon dioxide zero discharge, is a kind of important regenerative resource.Biomass material is generally containing large quantity of moisture, if without drying process before entering boiler as fuel, then the caloric value of unit mass biomass material is on the low side, the gross efficiency of biomass boiler is caused to decline, also can increase the size of biomass boiler feeding pipe and burner hearth, cause boiler cost to increase.Therefore, biomass material enter biomass boiler last as need to make pre-dried.
Traditional biomass material drying means needs to introduce external high temperature drying medium, and its technique is loaded down with trivial details, equipment is complicated, energy ezpenditure is large, cost of investment is high.In order to solve the problem, publication number is that the Chinese invention patent application prospectus of CN101693248A proposes a kind of high-temperature flue gas that uses and carries out dry method to biomass material, it makes water-contained biomass raw material after high temperature flue gas drying, again through heating pressurized treatments, make fluidisation slurry.But this method needs to introduce external high temperature drying medium, and energy ezpenditure is very big, can not adapt to energy-saving and emission-reduction requirement more and more higher in the national economic development at present.Notification number is the integrated system that the Chinese utility model patent description of CN202032602U discloses the predrying generating of a kind of flue gas, it utilizes smoke pre-heating to carry out drying to boiler brown coal raw material, but the roller equipment of Dryly use still needs additionally to consume a large amount of electric energy, thus increases operation difficulty and the operating cost of system.
Summary of the invention
Object of the present invention is exactly will overcome in existing biomass material dry technology to there is the high defect of device structure complexity, energy consumption, provides a kind of method and the device thereof that utilize biomass boiler flue gas drying biomass material.Its structure is simple, process economics, drying effect are good, effectively can reduce the size of biomass boiler system, significantly improve the thermal efficiency of biomass boiler system.
For achieving the above object, the method utilizing biomass boiler flue gas drying biomass material designed by the present invention, comprises the following steps:
1) biomass material to be combusted is imported on the working face of the crawler-tread machine arranged in hothouse, carry out continual dynamic transmission;
2) high-temperature flue gas of biomass boiler burning and exhausting is imported in deduster, remove the dust impurities of the wherein overwhelming majority, obtain comparatively clean flue gas;
3) part of getting in the comparatively clean flue gas of gained is transported in hothouse, makes it pass through the working face space of crawler-tread machine from bottom to top, carries out contact heat-exchanging with the biomass material of dynamic transmission, thus remove the part moisture content in biomass material;
4) flue gas utilized through heat exchange is derived hothouse, and be again delivered to continuation process in deduster;
5) hothouse will be derived through the biomass material that dehydrates, directly as biomass boiler fuel or store for subsequent use.
Preferably, above-mentioned steps 3) in, flue gas is first concentrated in the hot blast air chamber be transported to below the working face being arranged on crawler-tread machine, then overflows from hot blast air chamber top, pass through the working face space of crawler-tread machine, carry out contact heat-exchanging with the biomass material of dynamic transmission.Like this, the flue gas entering hothouse can be cushioned, make its uniform distribution carry out drying to the biomass material of dynamic transmission.
Further, above-mentioned flue gas controls at 110 ~ 150 DEG C in the temperature of hothouse porch, preferably controls at 120 ~ 130 DEG C; Above-mentioned flue gas controls, at 45 ~ 55 DEG C, preferably to control at 48 ~ 50 DEG C in the temperature in hothouse exit.Like this, the flue-gas temperature entering hothouse, lower than the minimum Precipitation Temperature of Volatile Colstituent effective in biomass material, can guarantee that biomass material loses without active princlple in dry run; And from hothouse export flue-gas temperature only higher than normal temperature tens degrees Celsius, can guarantee that biomass material makes full use of fume afterheat.
Further, the transmission speed of above-mentioned biomass material on crawler-tread machine is 0.2 ~ 0.8m/s, and the time of staying is 300 ~ 480s; The mean flow rate of above-mentioned flue gas in hothouse is 8 ~ 15m/s.Like this, by the biomass material of dynamic transmission and the conservative control of flue gas stream exposure parameter, can guarantee that both heat exchanges remain stable all the time, thus meet the industrial uninterrupted needs produced continuously.
For realizing said method and the custom-designed device utilizing biomass boiler flue gas drying biomass material, comprise deduster and hothouse, its special character is: described hothouse inner chamber is provided with crawler-tread machine, described hothouse top is respectively arranged with biomass feed inlet and smoke outlet tube, is respectively arranged with living beings discharging opening and flue gas inlet tube bottom described hothouse; Described biomass feed inlet is positioned at above crawler-tread machine input, described living beings discharging opening is positioned at below crawler-tread machine output, described smoke outlet tube is connected with the input of deduster by booster fan, and described flue gas inlet tube is connected with the output of deduster by air-introduced machine.
Preferably, multiple independently hot blast air chamber is set side by side with below the working face of described crawler-tread machine, be provided with air intake branch bottom described hot blast air chamber, described air intake branch is connected with flue gas inlet tube, and described hot blast air chamber top is evenly equipped with flue gas diffusion hole.Like this, the flue gas entering hothouse can be cushioned, make it evenly pass through the working face of crawler-tread machine, thus even drying is carried out to the biomass material of dynamic transmission.
Further, described air intake branch is provided with control valve.Like this, the flue gas flow of each air intake branch can be regulated easily, ensure the flue gas distributed uniform entering each hot blast air chamber.
Further, hot blast even distribution device is provided with in described hot blast air chamber.Like this, the flow of flue gas direction of each hot blast plenum interior can be regulated, thus flue gas flow field is formulated to optimum state.
The invention has the advantages that: the high-temperature flue gas that designed drying means directly utilizes biomass boiler to discharge is as thermal source, biomass material is dehydrated, the gross mass of biomass material can be alleviated more than 15%, the moisture of about half in biomass material can be removed, thus the caloric value of unit mass biomass material is significantly increased.Like this, both significantly can improve the thermal efficiency of biomass boiler system, there is considerable economic benefit; Correspondingly can reduce again the size of biomass boiler system feeding pipe.And the dry biomass material flue gas flow produced that burn is relatively low, can also reduce the size of whole biomass boiler system, effectively the cost of reduction boiler.Simultaneously, after biomass material drying, the humidity of its flue gas produced in combustion and flow also all obviously decline, and therefore discharge the flue gas of boiler when carrying out dedusting by deduster, the humidity of the flue gas of deduster process and flow be corresponding decline also, is conducive to improving efficiency of dust collection.
In addition, the apparatus structure designed by the present invention is simple, invest that little, dry air quantity is convenient to be regulated and distributed uniform, can meet the requirement of biomass material drying well.Although it increases with the energy consumption overcome on SR to some extent at increase section of tubing and blower fan, compare with high thermal efficiency with the low boiler cost that it is harvested, the energy consumption ratio of increase is extremely low, and whole system energy-saving and emission-reduction benefit is obvious.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation utilizing the device of biomass boiler flue gas drying biomass material.
Fig. 2 is the structure for amplifying schematic diagram of hothouse part in Fig. 1.
Fig. 3 is the A-A section structure for amplifying schematic diagram of Fig. 2.
In figure: biomass boiler 1, biomass feed inlet 2, deduster 3, living beings discharging opening 4, chimney 5, air-introduced machine 6, crawler-tread machine 7, hothouse 8, feed bin 9, booster fan 10, flue gas inlet tube 11, air intake branch 12, control valve 13, hot blast even distribution device 14, hot blast air chamber 15, flue gas diffusion hole 16, smoke outlet tube 17.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Utilize the device of biomass boiler flue gas drying biomass material shown in figure, comprise and be arranged on deduster 3 between biomass boiler 1 and chimney 5 and hothouse 8.The input of deduster 3 is connected with the exhanst gas outlet of biomass boiler 1, and the output of deduster 3 is connected with chimney 5.Be provided with crawler-tread machine 7 in hothouse 8, hothouse 8 top is respectively arranged with biomass feed inlet 2 and smoke outlet tube 17, is respectively arranged with living beings discharging opening 4 and flue gas inlet tube 11 bottom hothouse 8.Biomass feed inlet 2 is positioned at above crawler-tread machine 7 input, and is connected with feed bin 9.Living beings discharging opening 4 is positioned at below crawler-tread machine 7 output, can be transported to the fuel inlet of biomass boiler 1 from living beings discharging opening 4 dried biomass raw material out by transloading equipment.Smoke outlet tube 17 is connected by the input of booster fan 10 with deduster 3, and flue gas inlet tube 11 is connected with the output of deduster 3 by air-introduced machine 6.
Below the working face of crawler-tread machine 7, be provided with multiple independently hot blast air chamber 15 side by side, be provided with air intake branch 12 bottom each hot blast air chamber 15, each air intake branch 12 is connected with flue gas inlet tube 11 simultaneously, and each air intake branch 12 is provided with control valve 13.Be positioned at air intake branch 12 outlet top in each hot blast air chamber 15 and be also provided with hot blast even distribution device 14.In the present embodiment, the baffle plate that hot blast even distribution device 14 is fixed for level, leaves gap between its surrounding and hot blast air chamber 15, for disperseing the flue gas entering hot blast air chamber 15.Each hot blast air chamber 15 top is evenly equipped with flue gas diffusion hole 16, and flue gas evenly can pass through the working face of crawler-tread machine 7 by flue gas diffusion hole 16.
Account for the fresh bio raw material of gross mass about 30% for water content, said apparatus utilizes biomass boiler flue gas drying biomass material like this:
The biomass material to be combusted be stored in feed bin 9 is entered on the working face of the crawler-tread machine 7 in hothouse 8 by biomass feed inlet 2, carries out continual dynamic transmission, finally exports from living beings discharging opening 4.The transmission speed of biomass material on crawler-tread machine 7 is preferably 0.2 ~ 0.8m/s, optimum range at 0.4 ~ 0.6m/s, and the time of staying is preferably 300 ~ 480s, optimum range at 400 ~ 450s; The mean flow rate of flue gas in hothouse 8 is preferably 8 ~ 15m/s, optimum range at 10 ~ 12m/s.
Meanwhile, the high-temperature flue gas of biomass boiler 1 burning and exhausting enters in deduster 3, removes the dust impurities of the wherein overwhelming majority, obtains comparatively clean flue gas.In the flue gas that gained is comparatively clean, a part enters air by chimney 5, and another part is pressurizeed by air-introduced machine 6, enters each hot blast air chamber 15 in hothouse 8 through flue gas inlet tube 11, air intake branch 12.Flue gas in each hot blast air chamber 15 is by after hot blast even distribution device 14 current-sharing, flue gas diffusion hole 16 again through hot blast air chamber 15 top is overflowed, flue gas is made to pass through the working face space of crawler-tread machine 7 from bottom to top, carry out contact heat-exchanging with the biomass material of dynamic transmission on it, thus remove the part moisture content in biomass material.
Control above-mentioned flue gas to be 110 ~ 150 DEG C in the temperature of hothouse 8 porch, to be 45 ~ 55 DEG C in the temperature in hothouse 8 exit, waste heat and the temperature difference of flue gas can be made full use of, obtain good drying effect.In the present embodiment, flue gas is 120 ~ 130 DEG C in the temperature of hothouse 8 porch, and flue gas is 48 ~ 50 DEG C in the temperature in hothouse 8 exit.
Finally, the flue gas utilized through heat exchange derives hothouse 8 by smoke outlet tube 17, and is again delivered in deduster 3 and proceeds dust removal process; Meanwhile, derive hothouse 8 through the biomass material that dehydrates by living beings discharging opening 4, directly as biomass boiler 1 fuel or store for subsequent use.
The results showed: when hothouse 8 smoke inlet temperature about 130 DEG C, flue gas exit temperature about 50 DEG C, flue gas mean flow rate at about 12m/s time, about can slough by the biomass material of hothouse 8 moisture accounting for gross mass about 15%.Because flue-gas temperature is lower than the minimum Precipitation Temperature of volatile matter in biomass material, therefore there is not the problem of Volatile.
Claims (5)
1. utilize a method for biomass boiler flue gas drying biomass material, comprise the following steps:
1) biomass material to be combusted is imported on the working face of the crawler-tread machine (7) arranged in hothouse (8), carry out continual dynamic transmission; Wherein, the transmission speed of described biomass material on crawler-tread machine (7) is 0.2 ~ 0.8m/s, and the time of staying is 300 ~ 480s;
2) high-temperature flue gas of biomass boiler (1) burning and exhausting is imported in deduster (3), remove the dust impurities of the wherein overwhelming majority, obtain comparatively clean flue gas;
3) part of getting in the comparatively clean flue gas of gained is transported to hothouse (8), flue gas is made first to concentrate in the hot blast air chamber (15) be transported to below the working face being arranged on crawler-tread machine (7), overflow from hot blast air chamber (15) top again, it is made to pass through the working face space of crawler-tread machine (7) from bottom to top, carry out contact heat-exchanging with the biomass material of dynamic transmission, thus remove the part moisture content in biomass material; Wherein, described flue gas is 110 ~ 150 DEG C in the temperature of hothouse (8) porch, described flue gas is 45 ~ 55 DEG C in the temperature in hothouse (8) exit, and the mean flow rate of described flue gas in hothouse (8) is 8 ~ 15m/s;
4) flue gas utilized through heat exchange is derived hothouse (8), and continue process in being again delivered to deduster (3);
5) hothouse (8) will be derived through the biomass material that dehydrates, directly as biomass boiler (1) fuel or store for subsequent use.
2. utilize the method for biomass boiler flue gas drying biomass material according to claim 1, it is characterized in that: described flue gas is 120 ~ 130 DEG C in the temperature of hothouse (8) porch, described flue gas is 48 ~ 50 DEG C in the temperature in hothouse (8) exit.
3., for realizing the device utilizing biomass boiler flue gas drying biomass material that method described in claim 1 designs, comprising deduster (3) and hothouse (8), it is characterized in that:
Described hothouse (8) inner chamber is provided with crawler-tread machine (7), described hothouse (8) top is respectively arranged with biomass feed inlet (2) and smoke outlet tube (17), and described hothouse (8) bottom is respectively arranged with living beings discharging opening (4) and flue gas inlet tube (11); Described biomass feed inlet (2) is positioned at above crawler-tread machine (7) input, described living beings discharging opening (4) is positioned at below crawler-tread machine (7) output, described smoke outlet tube (17) is connected by the input of booster fan (10) with deduster (3), and described flue gas inlet tube (11) is connected by the output of air-introduced machine (6) with deduster (3);
Multiple independently hot blast air chamber (15) is set side by side with below the working face of described crawler-tread machine (7), described hot blast air chamber (15) bottom is provided with air intake branch (12), described air intake branch (12) is connected with flue gas inlet tube (11), described air intake branch (12) is provided with control valve (13), described hot blast air chamber (15) top is evenly equipped with flue gas diffusion hole (16).
4. utilize the device of biomass boiler flue gas drying biomass material according to claim 3, it is characterized in that: in described hot blast air chamber (15), be provided with hot blast even distribution device (14).
5. utilize the device of biomass boiler flue gas drying biomass material according to claim 4, it is characterized in that: described hot blast even distribution device (14) is the horizontal baffle being positioned at air intake branch (12) outlet top.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210442674.8A CN102954678B (en) | 2012-11-07 | 2012-11-07 | Utilize method and the device thereof of biomass boiler flue gas drying biomass material |
| PCT/CN2013/085685 WO2014071800A1 (en) | 2012-11-07 | 2013-10-22 | Method and apparatus for drying biomass raw material using biomass boiler flue gas |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210442674.8A CN102954678B (en) | 2012-11-07 | 2012-11-07 | Utilize method and the device thereof of biomass boiler flue gas drying biomass material |
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| CN102954678A CN102954678A (en) | 2013-03-06 |
| CN102954678B true CN102954678B (en) | 2015-08-19 |
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| WO (1) | WO2014071800A1 (en) |
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| CN102954678B (en) * | 2012-11-07 | 2015-08-19 | 阳光凯迪新能源集团有限公司 | Utilize method and the device thereof of biomass boiler flue gas drying biomass material |
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| CN104567335A (en) * | 2015-01-27 | 2015-04-29 | 中国能源建设集团江苏省电力设计院有限公司 | System and technological method for drying coal slime by high-temperature flue gas of power station |
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| CN107576178A (en) * | 2017-08-31 | 2018-01-12 | 北京环清环境科技有限公司 | A kind of material drying system and operation method |
| JP6933089B2 (en) * | 2017-10-27 | 2021-09-08 | 井関農機株式会社 | Crop dryer |
| CN109210910A (en) * | 2018-07-27 | 2019-01-15 | 浙江浙能富兴燃料有限公司 | A method of utilizing coal-burning power plant's Secondary Air dried biomass |
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| CN113251748A (en) * | 2021-05-18 | 2021-08-13 | 山东大学 | Solar heat collection, storage and drying system for biomass power plant fuel |
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| 履带式气流干燥器的研究与设计;韩丽华等;《中国油脂》;19970831;第22卷(第04期);27-30 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102954678A (en) | 2013-03-06 |
| WO2014071800A1 (en) | 2014-05-15 |
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