CN111084402A - Tobacco leaf bulk curing barn taking straws as fuel and curing method - Google Patents
Tobacco leaf bulk curing barn taking straws as fuel and curing method Download PDFInfo
- Publication number
- CN111084402A CN111084402A CN201911146231.2A CN201911146231A CN111084402A CN 111084402 A CN111084402 A CN 111084402A CN 201911146231 A CN201911146231 A CN 201911146231A CN 111084402 A CN111084402 A CN 111084402A
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- heat exchange
- chamber
- air inlet
- furnace
- tobacco
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- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
- A24B3/00—Preparing tobacco in the factory
- A24B3/10—Roasting or cooling tobacco
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- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
- A24B1/00—Preparation of tobacco on the plantation
- A24B1/02—Arrangements in barns for preparatory treatment of the tobacco, e.g. with devices for drying
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- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
- A24B3/00—Preparing tobacco in the factory
- A24B3/04—Humidifying or drying tobacco bunches or cut tobacco
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- Life Sciences & Earth Sciences (AREA)
- Agronomy & Crop Science (AREA)
- Manufacture Of Tobacco Products (AREA)
Abstract
The invention relates to a tobacco leaf bulk curing barn taking straws as fuel and a curing method, comprising a combustion chamber, a primary heat exchange chamber for curing, a secondary heat exchange chamber and a tobacco curing chamber, wherein the combustion chamber is internally provided with a combustion furnace; the first-stage heat exchange furnace is provided with a flue gas pipeline and is respectively communicated with the combustion furnace and the second-stage heat exchange furnace through the flue gas pipeline, the second-stage heat exchange furnace is provided with a waste gas pipeline, the combustion furnace is provided with a feed inlet, the upper part of the side wall of the first-stage heat exchange chamber adjacent to the second-stage heat exchange chamber is provided with a first air inlet, the lower part of the side wall of the first-stage heat exchange chamber adjacent to the second; a second air outlet is arranged at the upper part of the side wall of the tobacco flue-curing chamber adjacent to the secondary heat exchange chamber, a second air inlet is arranged at the lower part of the side wall of the tobacco flue-curing chamber adjacent to the secondary heat exchange chamber, and a second fan is arranged on the second air inlet; the top of the secondary heat exchange chamber is provided with a third air inlet; the invention uses two furnaces to burn for many times in series and uses flowing air as heat insulation medium, which can greatly improve the heat efficiency of the curing barn.
Description
Technical Field
The invention belongs to the field of tobacco leaf baking, and particularly relates to the field of tobacco leaf bulk curing barns taking straws as fuel.
Background
The number of smokers in China is large, and the tobacco consumption amount is large every year, so that the economic benefit of the tobacco industry can be obviously improved by improving the tobacco processing technology; among them, tobacco curing is a very important part of the tobacco processing process; moreover, the straws are used as agricultural organic wastes, and if the straws are improperly destroyed, a large amount of pollution is caused to the environment; the tobacco leaf curing barn taking the straws as fuel not only avoids the harm of the straws to the environment, but also reduces the dependence of tobacco leaf curing on fossil fuel and reduces the cost; high-temperature flue gas generated by a combustion boiler generally flows through a heat exchanger to transfer heat and heat air in a heating chamber to form hot air, the hot air is sent to a tobacco containing chamber by a circulating fan to heat tobacco leaves, the tobacco leaves are promoted to generate extremely complex changes, and the tobacco leaves are finally yellowed and dried; the flue gas which does work in the heat exchanger finally enters a chimney and is discharged outside the baking room; in fact, the exhausted flue gas still contains a large amount of heat, the temperature of the exhausted flue gas usually exceeds 120 ℃, and under the conditions that the heat conductivity coefficient of some heat exchangers is reduced and the heat exchange efficiency is reduced, the temperature of the exhausted flue gas can reach more than 200 ℃; at present, no waste heat utilization measure is taken on the bulk curing barn, and high-temperature flue gas is discharged into the atmosphere, so that the flue gas waste heat of the bulk curing barn is wasted and cannot be utilized, and the total heat efficiency of the curing barn is reduced, therefore, the coal consumption of unit dry tobacco leaves is large, the discharged flue gas is more, the curing cost is higher, the flue gas heat is not fully utilized, and the problem of low heat efficiency is caused.
Disclosure of Invention
In order to solve the problems, the invention achieves the purposes through the following technical scheme:
a tobacco leaf bulk curing barn taking straws as fuel comprises a combustion chamber, a primary heat exchange chamber for curing, a secondary heat exchange chamber and a tobacco curing chamber, wherein the primary heat exchange chamber is arranged above the combustion chamber, and the secondary heat exchange chamber is arranged between the combustion chamber and the tobacco curing chamber; a combustion furnace is arranged in the combustion chamber, a primary heat exchange furnace is arranged in the primary heat exchange chamber, and a secondary heat exchange furnace is arranged in the secondary heat exchange chamber; a flue gas pipeline is arranged on the primary heat exchange furnace and is respectively communicated with the combustion furnace and the secondary heat exchange furnace through the flue gas pipeline, a waste gas pipeline is arranged on the secondary heat exchange furnace, and the waste gas pipeline extends out of the secondary heat exchange chamber; the combustion furnace is provided with a feed inlet, the upper part of the side wall of the primary heat exchange chamber adjacent to the secondary heat exchange chamber is provided with a first air inlet, the lower part of the side wall of the primary heat exchange chamber adjacent to the secondary heat exchange chamber is provided with a first air outlet, and a first fan is arranged on the first air inlet; a second air outlet is formed in the upper part of the side wall, adjacent to the secondary heat exchange chamber, of the tobacco flue-curing chamber, a second air inlet is formed in the lower part of the side wall, and a second fan is arranged on the second air inlet; and a third air inlet is formed in the top of the secondary heat exchange chamber, and a dehumidifier is further arranged on the side wall of the tobacco curing chamber.
As a further optimized scheme of the invention, a third fan is arranged on the side wall of the combustion chamber, a shell is arranged outside the combustion chamber, a first air inlet pipe is arranged on the third fan, and the first air inlet pipe is communicated with the shell; the bottom of the combustion furnace is provided with a first air inlet, and the upper part of the combustion furnace is provided with a second air inlet; the air in the shell enters the combustion furnace through the first air inlet and the second air inlet respectively; and carrying out anoxic combustion in the combustion furnace.
As a further optimized scheme of the invention, a second air inlet pipe is arranged on the third fan, and the second air inlet pipe extends into the feeding hole; preventing flame in the combustion furnace from spraying outwards.
As a further optimization scheme of the invention, a waste gas processor is arranged outside the secondary heat exchange chamber and is communicated with a waste gas pipeline; the waste gas is discharged after being treated, thereby protecting the environment.
As a further optimization scheme of the invention, a humidity sensor is arranged in the tobacco flue-curing chamber.
A tobacco leaf baking method taking straws as fuel adopts the tobacco leaf bulk curing barn in any one of the schemes to bake.
The invention has the beneficial effects that:
1) according to the invention, two furnaces are connected in series for multiple times of combustion, and flowing air is used as a heat insulation medium, so that the heat efficiency of the curing barn can be greatly improved; the wet air enters the curing barn from the air inlet and then is divided into two parts, the two parts are respectively heated by the primary heat exchange furnace and the secondary heat exchange furnace and then are mixed, the wet and hot air entering the tobacco loading chamber under the action of the fan enters the tobacco loading chamber to cure tobacco leaves, and the wet and hot air in the tobacco loading chamber and the heat exchange chamber circulates;
2) through the two-stage heat exchange furnace, the problem that the heat efficiency is low due to insufficient utilization of the smoke heat of the previous one-stage heat exchange furnace is solved.
Drawings
FIG. 1 is a schematic diagram of the structural principle of the present invention;
in the figure: 1. a combustion chamber, 11, a combustion furnace; 111. a first air intake hole; 112. a second air intake hole; 12. a feed inlet; 13. a third fan; 14. a housing; 2. a primary heat exchange chamber; 21. a first-stage heat exchange furnace; 22. a flue gas duct; 23. a first air inlet; 24. a first air outlet; 25. a first fan; 3. a secondary heat exchange chamber; 31. a secondary heat exchange furnace; 32. an exhaust gas conduit; 33. a third air inlet; 34. an exhaust gas processor; 4. a tobacco flue-curing chamber; 41. a second air outlet; 42. a second air inlet; 43. a second fan; 44. a dehumidifier; 5. a first intake pipe; 6. a second intake pipe; 7. a humidity sensor.
Detailed Description
The present application will now be described in further detail with reference to the drawings, it should be noted that the following detailed description is given for illustrative purposes only and is not to be construed as limiting the scope of the present application, as those skilled in the art will be able to make numerous insubstantial modifications and adaptations to the present application based on the above disclosure.
As shown in fig. 1, the tobacco leaf bulk curing barn using straws as fuel comprises a combustion chamber 1, a primary heat exchange chamber 2, a secondary heat exchange chamber 3 and a tobacco curing chamber 4, wherein the primary heat exchange chamber 2 is arranged above the combustion chamber 1, and the secondary heat exchange chamber 3 is arranged between the combustion chamber 1 and the tobacco curing chamber 4;
a combustion furnace 11 is arranged in the combustion chamber 1, a primary heat exchange furnace 21 is arranged in the primary heat exchange chamber 2, and a secondary heat exchange furnace 31 is arranged in the secondary heat exchange chamber 3; the primary heat exchange furnace 21 is provided with a flue gas pipeline 22 and is respectively communicated with the combustion furnace 11 and the secondary heat exchange furnace 31 through the flue gas pipeline 22, the secondary heat exchange furnace 31 is provided with a waste gas pipeline 32, and the waste gas pipeline 32 extends out of the secondary heat exchange chamber 3;
the combustion furnace 11 is provided with a feed inlet 12, the side wall of the combustion chamber 1 is provided with a third fan 13, the outer cover of the combustion furnace 11 is provided with a closed shell 14, the third fan 13 is provided with a first air inlet pipe 5 and a second air inlet pipe 6, the first air inlet pipe 5 is communicated with the shell 14, and the second air inlet pipe 6 extends into the feed inlet 12;
the bottom of the combustion furnace 11 is provided with a first air inlet hole 111, and the upper part is provided with a second air inlet hole 112; the air in the shell 14 enters the combustion furnace 11 through the first and second air inlet holes 111, 112 respectively;
a first air inlet 23 is formed in the upper part of the side wall of the primary heat exchange chamber 2 adjacent to the secondary heat exchange chamber 3, a first air outlet 24 is formed in the lower part of the side wall, and a first fan 25 is arranged on the first air inlet 23;
a second air outlet 41 is arranged at the upper part of the side wall of the tobacco flue-curing chamber 4 adjacent to the secondary heat exchange chamber 3, a second air inlet 42 is arranged at the lower part of the side wall, and a second fan 43 is arranged on the second air inlet 42;
an exhaust gas processor 34 is arranged outside the secondary heat exchange chamber 3, and the exhaust gas processor 34 is communicated with an exhaust gas pipeline 32; a third air inlet 33 is formed in the top of the secondary heat exchange chamber 3;
a humidity sensor 7 is arranged in the tobacco flue-curing chamber 4, and a dehumidifier 44 is also arranged on the side wall;
the wet air outside the oven enters the curing barn through the third air inlet and then is divided into two parts, the two parts are respectively heated by the first-stage heat exchange oven and the second-stage heat exchange oven and then are mixed, the wet and hot air entering the curing barn under the action of the fan enters the curing barn to cure the tobacco leaves, and the wet and hot air in the tobacco loading chamber and the heat exchange barn circulates.
A tobacco leaf baking method taking straws as fuel adopts the tobacco leaf bulk curing barn for baking.
The working principle and the process of the tobacco leaf bulk curing barn are as follows:
when the curing barn works, the third air inlet 33 is firstly opened, air with humidity outside the curing barn is introduced into the secondary heat exchange chamber 3, part of the wet air flows to the lower part of the secondary heat exchange chamber 3 after entering the secondary heat exchange chamber 3, and the other part of the wet air enters the primary heat exchange chamber 2 under the action of the first fan 25; closing the third air inlet 33 after a certain time;
putting straws into a combustion furnace 11 from a feeding hole 12, starting a third fan 13, and respectively allowing air to enter the combustion furnace 11 and a shell 14 through a first air inlet pipe 5 and a second air inlet pipe 6 arranged on the third fan 13; the second air inlet pipe 6 extends into the feed inlet 12 and is used for preventing the flame in the furnace from overflowing outwards to cause heat loss;
after the air in the first air inlet pipe 5 enters the shell 14, a small part of air between the combustion furnace 11 and the interlayer of the shell 14 flows to the bottom of the shell 14, and then enters the combustion furnace through a first air inlet hole 111 arranged at the bottom of the combustion furnace 11; at this time, the bottom of the combustion furnace 11 can be subjected to oxygen-deficient combustion by the above arrangement to generate a large amount of carbon monoxide and nitrogen oxides; in addition, the shell 14 arranged outside the combustion furnace 11 plays a role of heat insulation and heat preservation, and on the other hand, the air in the interlayer between the shell 14 and the combustion furnace 11 is heated by the heat of the combustion furnace 11 in the process of flowing downwards, so that when the air enters the combustion furnace from the first air inlet hole 111 at the bottom of the combustion furnace, the temperature in the combustion furnace can be prevented from being greatly reduced;
after the air in the first air inlet pipe 5 enters the shell 14, most of the air enters the combustion furnace through the second air inlet hole 112 arranged at the upper part of the combustion furnace 11, when carbon monoxide and other combustible gases generated by oxygen-poor combustion at the bottom of the combustion furnace 11 rise to the upper part of the combustion furnace 11 and then are fully mixed with a large amount of air entering through the second air inlet hole 6, combustion further occurs, and due to insufficient reaction time, heat exchange can be carried out while continuous combustion is carried out in the subsequent first-stage heat exchange furnace 21 and the subsequent second-stage heat exchange furnace 31; the two-stage heat exchange furnace is designed to ensure that combustible gas generated by oxygen-deficient combustion is subjected to staged combustion in the combustion furnace 11, the first-stage heat exchange furnace 21 and the second-stage heat exchange furnace 31, so that the reaction time is prolonged, and the combustion heat value is improved; on the other hand, the heat exchange time is prolonged, so that more smoke heat is transferred to the outside air, and the tobacco leaf baking is conveniently carried out by utilizing hot air;
after the flue gas generated by the combustion furnace 11 is sequentially combusted through the primary heat exchange furnace 21 and the secondary heat exchange furnace 31, the flue gas enters the waste gas processor 34 through the waste gas pipeline 32, and is discharged after being processed;
a part of the wet air from the third air inlet 33 is introduced into the primary heat exchange chamber 2 through the first fan 25, is mixed with air and is heated, and then enters the secondary heat exchange chamber 3 through the first air outlet 24 at the lower part of the primary heat exchange chamber 2; the other part of humid air directly moves downwards in the secondary heat exchange chamber 3 and is mixed with the gas in the secondary heat exchange chamber 3, the humid hot air mixed in the secondary heat exchange chamber 3 enters the tobacco curing chamber 4 under the action of a second fan 43 of the tobacco curing chamber 4 to cure the tobacco leaves, the air flows from bottom to top, and finally enters the secondary heat exchange chamber 3 through a second air outlet 41 at the upper part of the tobacco curing chamber 4, so that the air in the tobacco curing chamber 4 and the secondary heat exchange chamber 3 starts to circulate to continuously cure the tobacco leaves; after working for a period of time, opening the third air inlet 33 and opening the dehumidifier 44 to dehumidify and ventilate the air in the baking room; the time for opening the dehumidifier 44 can be based on the technical points of the operation in the tobacco leaf baking process in the prior art, the tobacco leaf baking process has a plurality of steps, and the process requirements of each stage are different, so that the time cannot be specifically limited; taking the first process step as an example, the temperature of dry pellets is 38 ℃, the temperature of wet pellets is 36 ℃, big fire is burnt immediately after the brick bed is installed, a fan is started for internal circulation, the temperature is raised to 38 ℃ in about 5 hours, the temperature of the lower tobacco leaves is stabilized for 20 to 24 hours, and moderate moisture is discharged after the temperature of the middle upper part is stabilized for 20 to 28 hours.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.
Claims (6)
1. A tobacco leaf bulk curing barn taking straws as fuel is characterized in that: the device comprises a combustion chamber (1), a primary heat exchange chamber (2), a secondary heat exchange chamber (3) and a tobacco curing chamber (4), wherein the primary heat exchange chamber (2) is arranged above the combustion chamber (1), and the secondary heat exchange chamber (3) is arranged between the combustion chamber (1) and the tobacco curing chamber (4); a combustion furnace (11) is arranged in the combustion chamber (1), a primary heat exchange furnace (21) is arranged in the primary heat exchange chamber (2), and a secondary heat exchange furnace (31) is arranged in the secondary heat exchange chamber (3); a flue gas pipeline (22) is arranged on the primary heat exchange furnace (21) and is respectively communicated with the combustion furnace (11) and the secondary heat exchange furnace (31) through the flue gas pipeline (22), a waste gas pipeline (32) is arranged on the secondary heat exchange furnace (31), and the waste gas pipeline (32) extends out of the secondary heat exchange chamber (3); the combustion furnace (11) is provided with a feed inlet (12), the upper part of the side wall of the primary heat exchange chamber (2) adjacent to the secondary heat exchange chamber (3) is provided with a first air inlet (23), the lower part of the side wall is provided with a first air outlet (24), and the first air inlet (23) is provided with a first fan (25); a second air outlet (41) is formed in the upper part of the side wall, adjacent to the secondary heat exchange chamber (3), of the tobacco flue-curing chamber (4), a second air inlet (42) is formed in the lower part of the side wall, and a second fan (43) is arranged on the second air inlet (42); the top of the second-stage heat exchange chamber (3) is provided with a third air inlet (33), and the side wall of the tobacco flue-curing chamber (4) is also provided with a dehumidifier (44).
2. The tobacco leaf bulk curing barn taking straws as fuel as claimed in claim 1, wherein the tobacco leaf bulk curing barn takes the following steps: a third fan (13) is arranged on the side wall of the combustion chamber (1), a closed shell (14) is arranged outside the combustion furnace (11), a first air inlet pipe (5) is arranged on the third fan (13), and the first air inlet pipe (5) is communicated with the shell (14); the bottom of the combustion furnace (11) is provided with a first air inlet hole (111), and the upper part of the combustion furnace is provided with a second air inlet hole (112); the air in the shell (14) enters the combustion furnace (11) through the first air inlet hole and the second air inlet hole (111, 112).
3. The tobacco leaf bulk curing barn taking straws as fuel as claimed in claim 2, wherein the tobacco leaf bulk curing barn takes the following steps: and a second air inlet pipe (6) is arranged on the third fan (13), and the second air inlet pipe (6) extends into the feed inlet (12).
4. The tobacco leaf bulk curing barn taking straws as fuel as claimed in claim 1, wherein the tobacco leaf bulk curing barn takes the following steps: and an exhaust gas processor (34) is arranged outside the secondary heat exchange chamber (3), and the exhaust gas processor (34) is communicated with an exhaust gas pipeline (32).
5. The tobacco leaf bulk curing barn taking straws as fuel as claimed in claim 1, wherein the tobacco leaf bulk curing barn takes the following steps: a humidity sensor (7) is arranged in the tobacco flue-curing chamber (4).
6. A tobacco leaf baking method taking straws as fuel is characterized in that: curing is carried out using a bulk tobacco curing barn according to any one of claims 1-5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911146231.2A CN111084402A (en) | 2019-11-21 | 2019-11-21 | Tobacco leaf bulk curing barn taking straws as fuel and curing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911146231.2A CN111084402A (en) | 2019-11-21 | 2019-11-21 | Tobacco leaf bulk curing barn taking straws as fuel and curing method |
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| Publication Number | Publication Date |
|---|---|
| CN111084402A true CN111084402A (en) | 2020-05-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911146231.2A Pending CN111084402A (en) | 2019-11-21 | 2019-11-21 | Tobacco leaf bulk curing barn taking straws as fuel and curing method |
Country Status (1)
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| CN (1) | CN111084402A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201153498Y (en) * | 2008-02-02 | 2008-11-26 | 昆明康立信电子机械有限公司 | Coat gasification type baking oven |
| CN104877713A (en) * | 2015-06-01 | 2015-09-02 | 农业部规划设计研究院 | Secondary pyrolysis and waste heat recycling system for biomass pyrolysis gas |
| CN205947098U (en) * | 2016-06-24 | 2017-02-15 | 湖南鑫迪新能源科技有限公司 | Biomass pellet fuel heating equipment |
| CN109645542A (en) * | 2019-01-11 | 2019-04-19 | 东南大学 | A kind of tobacco first baking system of natural gas energy supply |
| JP6531212B1 (en) * | 2018-10-26 | 2019-06-12 | 株式会社タクボ精機製作所 | Drying air supply device |
-
2019
- 2019-11-21 CN CN201911146231.2A patent/CN111084402A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201153498Y (en) * | 2008-02-02 | 2008-11-26 | 昆明康立信电子机械有限公司 | Coat gasification type baking oven |
| CN104877713A (en) * | 2015-06-01 | 2015-09-02 | 农业部规划设计研究院 | Secondary pyrolysis and waste heat recycling system for biomass pyrolysis gas |
| CN205947098U (en) * | 2016-06-24 | 2017-02-15 | 湖南鑫迪新能源科技有限公司 | Biomass pellet fuel heating equipment |
| JP6531212B1 (en) * | 2018-10-26 | 2019-06-12 | 株式会社タクボ精機製作所 | Drying air supply device |
| CN109645542A (en) * | 2019-01-11 | 2019-04-19 | 东南大学 | A kind of tobacco first baking system of natural gas energy supply |
Non-Patent Citations (4)
| Title |
|---|
| 刘珊珊: "《认识我们身边的生物能》", 30 April 2021, 延边大学出版社 * |
| 杨树等: "《"清江源"现代烟草农业科技园区建设与实践》", 31 March 2013, 湖北科学技术出版社 * |
| 贾华平: "《水泥生产技术与实践》", 31 January 2018, 中国建材工业出版社 * |
| 金天明: "《我们的低碳生活》", 30 June 2013, 中国民主法制出版社 * |
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