CN211091845U - Natural gas direct combustion formula heating tobacco flue-curing house - Google Patents
Natural gas direct combustion formula heating tobacco flue-curing house Download PDFInfo
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- CN211091845U CN211091845U CN201921323484.8U CN201921323484U CN211091845U CN 211091845 U CN211091845 U CN 211091845U CN 201921323484 U CN201921323484 U CN 201921323484U CN 211091845 U CN211091845 U CN 211091845U
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 98
- 241000208125 Nicotiana Species 0.000 title claims abstract description 57
- 235000002637 Nicotiana tabacum Nutrition 0.000 title claims abstract description 57
- 239000003345 natural gas Substances 0.000 title claims abstract description 49
- 238000010438 heat treatment Methods 0.000 title claims abstract description 46
- 238000002485 combustion reaction Methods 0.000 title claims description 5
- 235000019504 cigarettes Nutrition 0.000 claims description 7
- 238000007599 discharging Methods 0.000 claims description 4
- 229910000838 Al alloy Inorganic materials 0.000 claims description 3
- 238000009792 diffusion process Methods 0.000 claims description 3
- 239000000779 smoke Substances 0.000 abstract description 13
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 8
- 230000001276 controlling effect Effects 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 108010068370 Glutens Proteins 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 235000021312 gluten Nutrition 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 235000019505 tobacco product Nutrition 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000004383 yellowing Methods 0.000 description 1
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Abstract
The utility model provides a natural gas direct-fired formula heating tobacco flue-curing house, natural gas direct-fired formula heating tobacco flue-curing house includes heating chamber, dress smoke chamber and PID control system, the heating chamber is provided with air intake, return air inlet, natural gas combustor, hydrofuge air-blower and temperature alarm, be equipped with dry bulb temperature sensor and wet bulb temperature sensor in the dress smoke chamber, the heating chamber passes through the air intake with the return air inlet with the dress smoke chamber is linked together, return air inlet department is provided with circulating fan, is used for the heating chamber with form the circulating air that lasts stable between the dress smoke chamber, PID control system respectively with the natural gas combustor the hydrofuge air-blower temperature alarm ware dry bulb temperature sensor with wet bulb temperature sensor is connected. The technical scheme of the utility model have clean environmental protection, advantage that energy utilization is high.
Description
Technical Field
The utility model relates to a technical field that the tobacco leaf toasted especially relates to a natural gas direct combustion formula heating tobacco flue-curing house.
Background
After being picked, the mature flue-cured tobacco leaves are put into a tobacco curing house and cured in a certain time and under the condition that the temperature and the humidity of the surrounding environment are controlled. In the process, the tobacco leaves are heated, and the moisture in the tobacco leaves is vaporized and then discharged out of the tobacco curing barn, so that the tobacco leaves are baked yellow and dried.
At present, the domestic bulk curing barn adopts the traditional method of mainly burning coal for supplying heat, and the proportion is more than 95 percent. Coal is commonly added into a hearth of heating equipment for ignition in the bulk curing barn, then heat is dissipated into a curing barn heating chamber through a heat dissipation pipeline, and then the heat is discharged into the external environment through a chimney. The intensive coal-fired curing barn has the advantages of large energy consumption loss and low effective utilization rate of heat energy.
Tobacco curing houses adopting new energy resources are researched more, and among the tobacco curing houses, natural gas is used as fuel. Chinese patent CN105146701A describes that the problem of serious environmental pollution of coal-fired flue-curing barn is solved by using flue-curing barn with natural gas heating device. However, the curing barn still adopts a heat transfer pipe to indirectly heat the circulating air, and has the problem of low energy utilization rate.
SUMMERY OF THE UTILITY MODEL
The utility model provides a natural gas direct-fired heating tobacco flue-curing house for overcoming the defects of outstanding environmental pollution problem and low energy utilization rate of the intensive tobacco flue-curing house, which has the advantages of clean environmental protection and high energy utilization rate.
In order to achieve the above purpose, the utility model provides a technical scheme as follows:
the utility model provides a natural gas direct combustion formula heating tobacco flue-curing house, its includes heating chamber, dress smoke chamber and PID control system, the heating chamber is provided with air intake, return air inlet, natural gas combustor, hydrofuge air-blower and temperature alarm, be equipped with dry bulb temperature sensor and wet bulb temperature sensor in the dress smoke chamber, the heating chamber passes through the air intake with the return air inlet with the dress smoke chamber is linked together, return air inlet department is provided with circulating fan, be used for the heating chamber with form between the dress smoke chamber and last stable circulated air, PID control system respectively with the natural gas combustor the hydrofuge air-blower temperature alarm dry bulb temperature sensor with wet bulb temperature sensor is connected.
Wherein the natural gas burner is a diffusion burner.
Wherein the dehumidifying blower is disposed at an upwind position of the natural gas burner in the heating chamber.
Wherein, the bottom of the tobacco containing chamber is provided with a moisture discharging port.
Wherein, the moisture exhaust port adopts a shutter made of aluminum alloy.
The temperature alarm is arranged in the heating chamber and close to the air inlet.
Compared with the prior art, the utility model discloses following advantage and beneficial effect have:
the natural gas burner is adopted to directly heat the circulating air and directly utilize the burner to generate flue gas, so that the utilization efficiency of heat can be greatly improved, and the heat transfer efficiency is only 42% through the traditional heat exchanger indirect heat transfer mode; the heat transfer efficiency of the direct-fired heating mode of the utility model can be improved to more than 90 percent.
Drawings
Fig. 1 is a schematic structural view of a natural gas direct-fired heating tobacco flue-curing house according to an embodiment of the present invention.
Fig. 2 is a flow chart of the primary tobacco leaf curing in the natural gas direct-fired heating tobacco curing barn according to the embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1, the embodiment of the present invention provides a natural gas direct-fired heating tobacco flue-curing house, which includes a heating chamber 1 provided with a natural gas burner 13, a dehumidifying blower 14 and a temperature alarm 11, a tobacco loading chamber 2 provided with a dehumidifying port 21, a dry-bulb temperature sensor 22 and a wet-bulb temperature sensor 23, and a PID control system 5. The top of the heating chamber 1 is provided with an air inlet 3, and the bottom is provided with an air return inlet 4. The heating chamber is communicated with the tobacco containing chamber 2 through the air inlet 3 and the air return opening 4.
And a circulating fan 12 is arranged at the air return opening 4 and used for forming continuous and stable circulating air between the heating chamber 1 and the smoke containing chamber 2. The performance parameters of the circulating fan 12 are as follows: rated frequency 50Hz, rated power 1.5-2.2kW, maximum rotation speed 1440r/min, flow rate 15000-3H is used as the reference value. The natural gas burner 13 burns in the heating chamber 1, and the generated smoke is mixed with circulating air and then returns to the tobacco containing chamber 2 to bake tobacco leaves. The natural gas burner 13 is a diffusion burner with a power range of 2-60 kw.
The dehumidifying blower 14 is disposed in the heating chamber 1 at a position upstream of the natural gas burner, and is configured to dehumidify air in the heating chamber 1. The operation air volume of the dehumidifying blower 14 is 500-2000m3/h。
The bottom of the tobacco containing chamber 2 is provided with a moisture discharging port 21 for discharging the water vapor in the tobacco containing chamber 2. The moisture exhaust port 21 can be made of aluminum alloy, so that the opening and closing are flexible and tight.
The temperature alarm 11 is arranged in the heating chamber 1 and close to the air inlet 4 and is used for detecting the temperature of circulating air at the air inlet 4, preventing the circulating air entering the cigarette containing chamber 2 from being overhigh in temperature, and automatically alarming and closing the natural gas burner 13 when the detected temperature exceeds the set temperature by 3 ℃ or exceeds 68.5 ℃.
The dry bulb temperature sensor 22 is used for detecting the dry bulb temperature of the smoke chamber 2. The wet bulb temperature sensor 23 is used for detecting the wet bulb temperature of the smoke containing chamber 2. The PID control system 5 is respectively connected with the natural gas burner 13, the dehumidifying blower 14, the temperature alarm 11, the dry bulb temperature sensor 22 and the wet bulb temperature sensor 23, and is used for controlling the natural gas flow of the natural gas burner 13 and the air volume of the dehumidifying blower 14 according to the dry bulb temperature and the wet bulb temperature of the smoke containing chamber 2.
As shown in fig. 2, the process of primary tobacco curing in the natural gas direct-fired tobacco curing barn is as follows:
step 1: clamping tobacco leaves to be baked by using tobacco leaves, and placing the tobacco leaves in a tobacco containing chamber 2;
step 2: starting a circulating fan 12 to form continuous and stable circulating air between the tobacco containing chamber 2 and the heating chamber 1;
and step 3: and (3) starting the natural gas burner 13 and the dehumidifying blower 14, starting the PID control system 5, and regulating and controlling the natural gas flow of the natural gas burner 13 and the air volume of the dehumidifying blower 14 according to the set dry bulb temperature and wet bulb temperature of the tobacco loading chamber 2 in the tobacco curing process.
And 4, step 4: and (3) after the tobacco leaves are baked, closing the natural gas combustor 13 and the dehumidifying blower 14, closing the PID control system 5, and finally closing the circulating fan 12.
Wherein, the dry bulb temperature and the wet bulb temperature control process of the tobacco flue-curing process loading chamber 2 consist of the following stages:
first stage, yellowing stage: the dry bulb temperature of the tobacco filling chamber is increased from the normal temperature to 36 ℃ and the wet bulb temperature is increased from the normal temperature to 34 ℃ after 1 hour, and the temperature is kept for 1 hour; the dry bulb temperature of the tobacco filling chamber is increased from 36 ℃ to 38 ℃ and the wet bulb temperature is increased from 34 ℃ to 36 ℃ after 4 hours, and the temperature is kept for 16 hours; the dry bulb temperature of the tobacco filling chamber is increased from 38 ℃ to 40 ℃ and the wet bulb temperature is increased from 36 ℃ to 37 ℃ after 4 hours, and the temperature is kept for 8 hours; the temperature of the tobacco filling chamber is increased from 40 ℃ to 42 ℃ and the wet bulb temperature is increased from 37 ℃ to 38 ℃ after 4 hours, and the temperature is kept for 12 hours;
second stage, fixing color period: the dry bulb temperature of the tobacco filling chamber is increased from 42 ℃ to 47 ℃ after 10 hours, the wet bulb temperature is maintained at 38 ℃, and the temperature is maintained for 14 hours; the dry bulb temperature of the tobacco filling chamber is increased from 47 ℃ to 50 ℃ after 8 hours, the wet bulb temperature is maintained at 38 ℃, and the temperature is maintained for 8 hours; the dry bulb temperature of the tobacco filling chamber is increased from 50 ℃ to 54 ℃ and the wet bulb temperature is increased from 38 ℃ to 39 ℃ after 8 hours, and the temperature is kept for 12 hours;
third stage, dry gluten period: the dry bulb temperature of the tobacco filling chamber is increased from 54 ℃ to 60 ℃ and the wet bulb temperature is increased from 39 ℃ to 40 ℃ after 6 hours, and the temperature is kept for 4 hours; the dry bulb temperature of the tobacco filling chamber is increased from 60 ℃ to 67 ℃ and the wet bulb temperature is increased from 40 ℃ to 42 ℃ after 8 hours, and the temperature is kept for 16 hours.
Wherein, the PID control system 5 controls the dry bulb temperature of the cigarette containing chamber 2 by adjusting and controlling the natural gas flow of the natural gas burner 13, and controls the wet bulb temperature of the cigarette containing chamber by adjusting the air quantity of the dehumidifying blower 14; when the dry bulb temperature and the wet bulb temperature need to be adjusted simultaneously, the dry bulb temperature is adjusted first, and then the wet bulb temperature is adjusted; when the wet bulb temperature is adjusted, the natural gas flow of the natural gas combustor 13 is proportionally adjusted while the air volume of the dehumidifying blower 14 is adjusted to compensate for the heat emitted in the dehumidifying process. The natural gas burner 13 requires about 0.8-0.9Nm3 of natural gas per kg of dry tobacco product to be cured.
To sum up, the technical scheme of the utility model have following advantage and beneficial effect:
1. the natural gas burner is adopted to directly heat the circulating air and directly utilize the burner to generate flue gas, so that the utilization efficiency of heat can be greatly improved, and the heat transfer efficiency is only 42% through indirect heat transfer of the heat exchanger; the heat transfer efficiency can be improved to more than 90% by changing the direct-fired heating.
2. PID automatic control is realized on the dry bulb temperature and the wet bulb temperature of the tobacco curing room in the tobacco curing process, and the labor cost is saved.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (6)
1. The utility model provides a natural gas direct combustion formula heating tobacco flue-curing house, its characterized in that, includes heating chamber, dress cigarette room and PID control system, the heating chamber is provided with air intake, return air inlet, natural gas combustor, hydrofuge air-blower and temperature alarm, be equipped with dry bulb temperature sensor and wet bulb temperature sensor in the dress cigarette room, the heating chamber passes through the air intake with the return air inlet with the dress cigarette room is linked together, return air inlet department is provided with circulating fan, be used for the heating chamber with form the circulating air that lasts stable between the dress cigarette room, PID control system respectively with the natural gas combustor the hydrofuge air-blower temperature alarm dry bulb temperature sensor with wet bulb temperature sensor is connected.
2. The natural gas direct-fired heating tobacco flue-curing house of claim 1, characterized in that: the natural gas combustor is a diffusion combustor.
3. The natural gas direct-fired heating tobacco flue-curing house of claim 1, characterized in that: the dehumidifying blower is arranged in the heating chamber and is positioned at the upwind position of the natural gas burner.
4. The natural gas direct-fired heating tobacco flue-curing house of claim 1, characterized in that: the bottom of the tobacco containing chamber is provided with a moisture discharging port.
5. The natural gas direct-fired heating tobacco flue-curing house of claim 4, characterized in that: the moisture exhaust port is a shutter made of aluminum alloy.
6. The natural gas direct-fired heating tobacco flue-curing house of claim 1, characterized in that: the temperature alarm is arranged in the heating chamber and close to the air inlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921323484.8U CN211091845U (en) | 2019-08-15 | 2019-08-15 | Natural gas direct combustion formula heating tobacco flue-curing house |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921323484.8U CN211091845U (en) | 2019-08-15 | 2019-08-15 | Natural gas direct combustion formula heating tobacco flue-curing house |
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| Publication Number | Publication Date |
|---|---|
| CN211091845U true CN211091845U (en) | 2020-07-28 |
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|---|---|---|---|
| CN201921323484.8U Active CN211091845U (en) | 2019-08-15 | 2019-08-15 | Natural gas direct combustion formula heating tobacco flue-curing house |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110447943A (en) * | 2019-08-15 | 2019-11-15 | 深圳中燃哈工大燃气技术研究院有限公司 | A kind of method that natural gas direct combustion type heats tobacco flue-curing house and junior tobacco leaf |
-
2019
- 2019-08-15 CN CN201921323484.8U patent/CN211091845U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110447943A (en) * | 2019-08-15 | 2019-11-15 | 深圳中燃哈工大燃气技术研究院有限公司 | A kind of method that natural gas direct combustion type heats tobacco flue-curing house and junior tobacco leaf |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 518000 3510-83, Luohu business center, No. 2028, Shennan East Road, Chengdong community, Dongmen street, Luohu District, Shenzhen, Guangdong Province Patentee after: Shenzhen zhongran Energy Research Center Co.,Ltd. Address before: 518000 B block 1301, Binhe Road, Futian District, Shenzhen, Guangdong. Patentee before: SHENZHEN CHINA GAS HIT GAS TECHNOLOGY RESEARCH INSTITUTE CO.,LTD. |
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| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220627 Address after: 518000 building 37, Dayun software Town, 8288 Longgang Avenue, Longgang street, Longgang District, Shenzhen City, Guangdong Province Patentee after: SHENZHEN ZHONGRAN TECHNOLOGY Co.,Ltd. Address before: 518000 3510-83, Luohu business center, No. 2028, Shennan East Road, Chengdong community, Dongmen street, Luohu District, Shenzhen, Guangdong Province Patentee before: Shenzhen zhongran Energy Research Center Co.,Ltd. |