CN111493348A - Tobacco leaf primary curing system with complementary energy supply of solar photo-thermal, photovoltaic and natural gas - Google Patents
Tobacco leaf primary curing system with complementary energy supply of solar photo-thermal, photovoltaic and natural gas Download PDFInfo
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- CN111493348A CN111493348A CN202010263675.0A CN202010263675A CN111493348A CN 111493348 A CN111493348 A CN 111493348A CN 202010263675 A CN202010263675 A CN 202010263675A CN 111493348 A CN111493348 A CN 111493348A
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- 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
Abstract
The invention discloses a tobacco primary baking system with complementary energy supply of solar photo-thermal, photovoltaic and natural gas, which comprises: bulk curer module, solar photothermal heating module, solar photovoltaic heating module, natural gas hot-blast furnace heating module, intelligent control module. According to the invention, based on the principle of solar energy preferential heat supply, heat required by primary baking of tobacco leaves is provided in a mode of solar energy photo-thermal, photovoltaic and natural gas complementary energy supply, and three heating systems are operated independently and coordinately with each other through an intelligent control module, so that energy conservation, emission reduction, accurate baking, labor and time conservation are realized.
Description
Technical Field
The invention belongs to the field of energy utilization, and particularly relates to a tobacco primary curing system with complementary energy supply of solar photo-electricity, photovoltaic and natural gas.
Background
China is the country with the largest tobacco planting area in the world, and the flue-cured tobacco yield is the first to live in the world for many years. The bulk curing barn is special equipment for bulk curing and processing tobacco leaves, the existing bulk curing barn is mostly built in a connected manner, dozens of or even hundreds of connected bulk curing barn groups are formed, and the area of the roof is large and can reach 3000m2The above.
With the improvement of the environmental protection requirement of China, the tobacco primary curing system gradually eliminates highly-polluted biomass or coal-fired energy and replaces the highly-polluted biomass or coal-fired energy with clean and pollution-free electric energy, solar energy or natural gas and the like. The flue-cured tobacco heat conversion rate of the electric drive heat pump is high, the environmental protection benefit is obvious, but the power generation is still realized by coal burning at present, the energy transfer is essential, the energy is excellent, the use is low, and the comprehensive heat efficiency is not dominant.
The solar energy is an inexhaustible renewable energy source, does not need to be mined and transported, and is convenient and simple to develop and utilize. The mature solar energy utilization products in China mainly comprise two types of solar photovoltaic power generation systems and solar water heating systems, but are unstable due to the influence of factors such as time, seasons, places and the like, and cannot be independently used in the whole process of primary tobacco leaf curing.
An important content in the environmental protection policy of China is that natural gas is widely popularized and used, and the natural gas has high combustion heat value and is clean and environment-friendly. On the premise that China has basically built a nationwide natural gas pipe network at present, the peripheral investment of primary tobacco leaf baking by using natural gas is small. Technically, the natural gas has small use difficulty, is easy to ignite and extinguish, can be stably combusted for a long time, has high load adjustment speed and high precision, and has very good advantages when being used as an original fuel for heat energy utilization. However, at present, natural gas is still rarely studied in the field of primary flue-curing of tobacco leaves.
Disclosure of Invention
In order to solve the problems, the invention discloses a tobacco leaf primary curing system with complementary energy supply of solar photo-thermal, photovoltaic and natural gas, which makes full use of a roof platform of a bulk curing barn, provides heat required by primary curing of tobacco leaves in a solar photo-thermal, photovoltaic and natural gas energy supply complementary mode according to the principle that solar energy preferentially supplies heat, improves the energy utilization rate, and is energy-saving and environment-friendly.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a tobacco primary curing system with complementary energy supply of solar photo-photovoltaic-natural gas comprises a bulk curing barn module, a solar photo-thermal heating module, a solar photovoltaic heating module, a natural gas hot blast stove heating module and an intelligent control module;
the bulk curing barn module comprises a tobacco containing chamber, a circulating fan, an air supply outlet, an air return inlet, a moisture exhaust outlet and an air supplement door; the circulating fan is arranged in the heating chamber, the heating chamber and the tobacco containing chamber are arranged adjacently, the heating chamber is communicated with the upper part of the tobacco containing chamber through an air supply port, the lower part of the heating chamber is communicated through an air return port, the air supplement door is arranged below the heating chamber, the moisture exhaust port is arranged below the tobacco containing chamber, and two groups of dry and wet bulb temperature sensors T1 and T2 are arranged in the tobacco containing chamber;
the solar photo-thermal heating module comprises a solar heat collector, a water tank, a water-air heat exchanger, a water pump P1, a valve V1, a water pump P2 and a valve V2; the solar heat collector is connected with a water tank through a circulating pipe, the water pump P1 and the valve V1 are arranged on the circulating pipe I, the water tank is connected with a water-air heat exchanger through a circulating pipe II, the circulating pipe II is provided with a water pump P2, a valve V2 and a temperature sensor T3, and the water-air heat exchanger is arranged in the heating chamber;
the solar photovoltaic heating module comprises a solar cell panel group, a photovoltaic inverter, an electric heater and an electric heater control switch; the solar cell panel group is connected with a national power grid and an electric heater through a photovoltaic inverter; the electric heater is arranged in the heating chamber, and the work/stop is realized by the on/off of the electric heater control switch;
the natural gas hot blast stove heating module comprises a natural gas burner, a high-temperature combustion cylinder and a two-stage heat exchanger which are arranged in a heating chamber, and the high-temperature combustion cylinder and the two-stage plate heat exchanger are sequentially arranged in series from top to bottom; the natural gas burner is arranged at the upper part of the side surface of the natural gas hot blast stove device and is connected with the high-temperature combustion cylinder;
the intelligent control module is respectively connected with the natural gas burner, the air supplement door, the circulating fan, the dry-wet bulb temperature sensors T1 and T2, the temperature sensor T3, the electric heater control switch, the water pump P1, the valve V1, the water pump P2 and the valve V2, and the operation switching among different heating systems is coordinated according to the heat demand of tobacco leaves.
The size in the cigarette containing chamber is 8m in length, 2.7m in width, 3.5m in height and 75.6m in volume33-4t of fresh tobacco leaves can be loaded at one time, and the air flow is descending, and two groups of dry and wet bulb temperature sensors are arranged inside the air flow descending type tobacco leaf dryer.
The solar heat collector is a vacuum tube heat collector and is arranged on a roof platform of the bulk curing barn, the optimal installation inclination angle is reduced by 10 degrees on the basis of local latitude, and the installation inclination angle faces south.
The water-air heat exchanger is a serpentine tube heat exchanger.
The valve V1 and the valve V2 can adjust the opening according to the heat quantity required by primary baking of the tobacco leaves to control the flow quantity.
The solar cell panel group is composed of a plurality of solar cell panels, is arranged on a roof platform of the bulk curing barn, and has the optimal installation inclination angle which is reduced by 10 degrees on the basis of local latitude and faces south.
The photovoltaic inverter converts direct current generated by the solar cell panel set into alternating current, and the alternating current is incorporated into a national power grid or is supplied for the electric heater.
Whether the electric heater is electrified or not is realized by whether the electric heater control switch is closed or not.
The electric heater is a plurality of ceramic electric heating rods connected in parallel and is horizontally arranged on the natural gas hot blast stove.
The circulating fan is a double-speed axial flow fan with 1.5kW/2.2kW, has two running modes of large wind and small wind, is arranged on the electric heater and is flush with the lower edge of the air supply outlet.
The tobacco leaf primary curing system is combined with a plurality of connected bulk curing barn groups, the solar photovoltaic heating module supplies power to the power generation sub-barn in the connected bulk curing barn groups, the solar photovoltaic heating module supplies heat to the heat collection sub-barn in a single connected bulk curing barn group, and the natural gas hot blast stove heating module supplies heat to the single curing barn independently in a one-to-one correspondence manner.
The invention relates to a tobacco primary curing system with complementary energy supply of solar photo-thermal, photovoltaic and natural gas, which comprises the following operation methods:
(1) the first operation condition is as follows: if the water temperature of the water tank is 30 ℃ higher than the baking temperature of the tobacco filling chamber, the solar photothermal module supplies heat independently; the working principle is as follows: hot water in the solar thermal collector enters a water tank, the hot water in the water tank enters a water-air heat exchanger to exchange heat with low-temperature air for primary tobacco leaf baking, the temperature of the heated air is increased, the hot air is sent into a tobacco containing chamber from an air supply opening through a circulating fan, the circulating water returns to the water tank after the temperature of the circulating water is reduced, and then the circulating water enters the solar thermal collector to be heated again;
(2) and a second operation condition: if the water temperature of the water tank is 15-30 ℃ higher than the baking temperature of the tobacco filling chamber, the solar thermal module and the solar photovoltaic module supply heat together; the working principle of the solar photovoltaic heating module is as follows: when the water temperature of the water tank is detected to be 15-30 ℃ higher than the baking temperature, the control switch of the electric heater is closed, the electric heater starts to work after being electrified, the air flowing out of the water-air heat exchanger is heated again, and the hot air is sent into the cigarette containing chamber from the air supply opening through the circulating fan;
(3) and the operation working condition is three: if the water temperature of the water tank is 0-15 ℃ higher than the baking temperature of the tobacco filling chamber or the water temperature of the water tank is lower than the baking temperature, the solar photothermal module stops supplying heat, the solar photovoltaic module stops supplying power, and the natural gas hot blast stove module independently supplies heat; the working principle is as follows: the natural gas is ignited in the natural gas burner and then sprayed into the high-temperature combustion cylinder, the natural gas is combusted in the high-temperature combustion cylinder, the generated high-temperature flue gas sequentially enters the two-stage plate heat exchanger to exchange heat with low-temperature air, and hot air is sent into the smoke containing chamber from the air supply opening through the circulating fan;
(4) and the operation working condition is four: when the tobacco is not cured, the solar photothermal module provides domestic hot water for nearby residents;
(5) the operation working condition is five: when the tobacco is not cured, the solar photovoltaic module generates electric energy and continuously incorporates the electric energy into a national power grid.
The heat supply and the discharge of humid air in the tobacco leaf baking process are born by the cooperation of the photo-thermal heating module, the photovoltaic heating module and the natural gas hot air furnace module, can be used independently or run jointly, and realize the coordination work through the intelligent control module.
The invention has the beneficial effects that:
the invention utilizes solar energy and natural gas as heat supply energy, and has the characteristics of clean energy and environmental protection.
The invention combines solar energy heat supply and natural gas heat supply to realize advantage complementation, reduces the initial investment and the operating cost of the system, saves energy and reduces emission.
The invention has various operation conditions, and can ensure that the system can stably and efficiently operate under different operation conditions by switching different operation conditions, thereby greatly improving the applicability of the system, improving the precision of the baking process and further improving the quality of tobacco leaves.
The natural gas hot blast stove module adopts the plate heat exchanger, has high heat transfer coefficient, compact structure and small volume, and saves space.
The solar energy photothermal module can provide heat for the curing barn in the tobacco curing season, and can also supply living hot water for nearby residents in non-tobacco curing seasons, so that solar energy is fully utilized, and living expenses of the residents are reduced.
The photovoltaic power generation can be carried out all the year round, and the generated energy can be transmitted to a national power grid in other time except for supplying heat to the power supply and heating equipment in the tobacco season, so that extra electric energy benefit is obtained.
Drawings
FIG. 1 is a schematic diagram of the system operating principle of the present invention;
FIG. 2 is a schematic diagram of the control circuitry of the present invention;
FIG. 3 is a schematic view of the solar collector and solar panel arrangement of the roof of the connected bulk curing barn of the present invention;
FIG. 4 is a schematic view of the arrangement of the solar heat collector on the roof of the single connected bulk curing barn;
FIG. 5 is a schematic view of an electric heater of the present invention;
fig. 6a is a top view of a plate heat exchanger according to the invention;
fig. 6b is a view a-a of fig. 6 a.
List of reference numerals:
1-an air supply outlet, 2-a smoke containing chamber, 3-an air return inlet, 4-a circulating fan, 5-an air supplement door, 6-a moisture exhaust outlet, 7-a solar heat collector, 8-a water pump P1, 9-a valve V1, 10-a water tank, 11-a water pump P2, 12-a valve V2, 13-a water-air heat exchanger, 14-a solar cell panel set, 15-a photovoltaic inverter, 16-an electric heater control switch, 17-an electric heater, 18-a natural gas burner, 19-a high-temperature combustion cylinder, 20-a two-stage plate heat exchanger, 21-an intelligent control module, 22-two groups of dry and wet bulb temperature sensors T1 and T2, 23-a temperature sensor T3, 24-a heating chamber, 25, a first circulating pipe, 26 and a second circulating pipe.
Detailed Description
The present invention will be further illustrated with reference to the accompanying drawings and specific embodiments, which are to be understood as merely illustrative of the invention and not as limiting the scope of the invention. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.
As shown in the figure, the tobacco primary curing system with the complementary energy supply of solar photo-photovoltaic and natural gas is combined with a plurality of connected bulk curing barn groups, the solar photovoltaic heating modules supply power (also heat) for power generation in the connected bulk curing barn groups in a divided manner, the solar photo-thermal heating modules supply heat for heat collection in single connected bulk curing barn groups in the single connected bulk curing barn groups, and the natural gas hot-blast stove heating modules supply heat for the single curing barn in a one-to-one correspondence manner. Each curing barn of the connected intensive curing barn group adopts a baking mode of staggering the opening time, so that the excessive concentration of required heat can be avoided, the pressure of concentrated heat collection and separated heating of the solar thermal modules and concentrated power generation and separated power supply of the solar photovoltaic modules is relieved, the utilization time of solar energy is prolonged, and the use amount of natural gas is saved.
Referring to fig. 1, the system operating principle:
bulk curer module: heated hot air enters the tobacco loading chamber 2 through the upper air supply outlet 1, and after heat and humidity exchange is carried out on the heated hot air and tobacco leaves, moisture in the tobacco leaves is taken away, the temperature is reduced, the humidity is increased, the heated hot air is discharged through the lower air return inlet 3, the return air is divided into two parts, one part flows upwards through the peripheral space of the heating equipment, the other part enters the heating equipment again to be heated, then peripheral cold air and hot air after internal heating are mixed in the upper part, and the hot air enters the tobacco loading chamber 2 again after passing through the circulating fan 4 to be circulated for a new round. In order to ensure the tobacco leaf baking quality, the humidity dynamic balance in the tobacco loading chamber 2 needs to be maintained, so that the moisture removal and the air supplement are needed at irregular time and are linked. When the temperature of wet balls in the curing barn is too high, the air supplementing door 5 is opened firstly, and the external low-temperature and low-humidity air (namely air supplementing) is sent into the tobacco containing chamber 2 after passing through the heating device under the suction action of the circulating fan 4. Because the air supplement continuously enters, positive pressure is formed in the tobacco loading chamber 2, and then high-temperature and high-humidity air is ejected out of the moisture exhaust port 6.
Solar energy photo-thermal heating module: when the solar heat collector 7 is illuminated in the daytime, the water pump 8 and the valve 9 are started, and circulating water is heated by the solar heat collector 7 and then is conveyed to the water tank 10 through the circulating pipe I25; when the tobacco leaf curing barn has heat demand and the water temperature of the water tank is 30 ℃ higher than the curing temperature, the water pump 11 and the valve 12 are opened, the circulating water enters the water-air heat exchanger 13 through the second circulating pipe 26 to exchange heat with low-temperature air for primary curing of tobacco leaves, the temperature of the heated air is increased, the circulating water returns to the water tank 10 after the temperature of the heated air is reduced, and then the circulating water enters the solar heat collector 7 to be heated again. In the baking process, the opening degrees of the valve 9 and the valve 12 are flexibly controlled according to the heat quantity required by the baking room.
A plurality of solar heat collectors on the roof of a single connected bulk curing barn group are connected and share 1 water tank, and each curing barn is respectively provided with a water-air heat exchanger, so that the concentrated heat collection and the separated heat supply are realized.
The solar photovoltaic heating module: when the solar panel set 14 is illuminated in the daytime, solar radiation energy is received by the solar panel set 14, photovoltaic effect is generated, the solar radiation energy is converted into electric energy, the electric energy is converted into alternating current through the photovoltaic inverter 15, and the alternating current is merged into a national power grid. When the water temperature of the water tank is detected to be 15-30 ℃ higher than the baking temperature, the solar thermal module cannot meet the heat supply requirement independently, the electric heater control switch 16 is closed, the electric heater 17 starts to work after being electrified, and the air flowing out of the water-air heat exchanger 13 is heated again.
The solar cell panel set is arranged on the roof of a plurality of connected dense curing barn groups for centralized power generation, and each curing barn is respectively provided with an electric heater for realizing power supply in a separated manner.
Heating module of natural gas hot-blast stove: when the water temperature of the water tank is higher than the baking temperature by 0-15 ℃ or lower than the baking temperature, the solar photothermal module and the photovoltaic module work simultaneously, the heating demand cannot be met, at the moment, the photothermal module stops heating, the photovoltaic module stops supplying power, and the natural gas hot blast stove module starts working. The natural gas is ignited in the natural gas burner 18 and then sprayed into the high-temperature combustion cylinder 19, the natural gas is violently combusted in the high-temperature combustion cylinder 19, and the generated high-temperature flue gas sequentially enters the two-stage plate heat exchanger 20 to exchange heat with low-temperature air. The natural gas hot blast stove adopts a counter-flow arrangement, smoke flows from top to bottom, air flows from bottom to top, the counter-flow arrangement has large heat exchange temperature difference and high heat exchange coefficient, and the heat exchange efficiency can be greatly improved.
Referring to fig. 2, the intelligent control module 21 is respectively connected with the circulating fan 4, the air supply valve 5, the water pump 8, the valve 9, the water pump 11, the valve 12, the electric heater control switch 16, the natural gas burner 18, the two sets of dry and wet bulb temperature sensors 22 and the temperature sensor 23, and coordinates the operation switching among different heating systems according to the heat demand of the tobacco leaves.
The heating chamber 24 is internally provided with a circulating fan 4, a water-air heat exchanger 13, a natural gas hot blast stove and an electric heater 17, so that hot air with various temperatures can be conveniently sent into the cigarette containing chamber 1 from an air supply outlet.
Example (b):
in the flue-cured tobacco region, the Kunming city in Yunnan province is taken as an example, the north latitude is 25 degrees, the east longitude is 103 degrees, and the local flue-cured tobacco month is 7-9 months. Referring to FIG. 3, 10 bulk curing barn are connected into a whole, 60 are in 2 rows and 3 columns, and the total area of the roof is about 3000m2. The tobacco loading capacity of a single curing barn is 4000 kg.
The solar photo-thermal heating module is preliminarily designed:
according to the principle of solar energy photo-thermal priority heat supply, preliminary calculation of a solar heat collector is firstly carried out. According to experience and estimation, the temperature of water heated by the solar heat collector can reach 90 ℃, the temperature of 90 ℃ water can heat 20 ℃ air to 50 ℃ at most, and therefore the solar heat collector can only supply heat independently in the early stage of primary curing of tobacco leaves. Therefore, the design standard of the solar heat collector is that the heat collector can supply heat independently to meet the temperature requirement in the smoke containing chamber under the condition of sufficient illumination in the yellowing stage.
(1) Calculating theoretical power required in the early stage of the tobacco leaf baking process:
for a single curing barn, the maximum water loss amount in the yellowing stage is about 20kg/h (the temperature of the curing barn is about 42 ℃), if the heat is completely provided by the solar heat collector, the heat supply amount is amplified in consideration of various heat lossesThe coefficient is 1.2, so that the heat quantity required to be provided by the heat collector per hour is 6 × 104kJ, i.e. 16.7 kW.
(2) Determining the heat collection area of the solar heat collector:
taking 8 months as an example, the total solar energy radiant quantity of the inclined surface of Kunming area per month is about 13.963MJ/m2When the number of hours of the sun-shine is about 147.2 hours, the average daily solar radiation quantity per hour on the unit heat collection surface is about 2.94MJ/m2I.e. the intensity of the solar radiation is 0.82kW/m2The solar heat collection efficiency is 60%, and the heat collection area of the heat collector required by the single curing barn is calculated to be about 33m2。
(3) The solar heat collector on the roof of the bulk curing barn is arranged:
referring to fig. 3, the solar heat collectors are arranged in 6 shadow areas, namely 6 roof areas of the connected intensive curing barn, the specification of each heat collector is selected to be 3000mm × 1000mm × 75mm, and the heat collection area is about 3m2Referring to fig. 4, 120 heat collectors can be arranged on the roof platform of a single connected bulk curing barn (10 curing barn) with a heat collection area of (3 m) and 12 rows of × columns2×120=360m2）>（33m2×10=330 m2) Namely, the heat required by the bulk curing barn in the early stage of baking can be met under the condition of sufficient illumination.
The installation inclination angle of the solar heat collector is 15 degrees, and the solar heat collector faces the south and can fully absorb solar radiation energy.
A single connected bulk curing barn group (10 curing barns) shares 1 water tank, and each curing barn is respectively provided with a water-air heat exchanger, so that centralized heat collection and separated heating are realized.
The solar photovoltaic heating module is preliminarily designed:
(1) the solar cell panel group on the roof of the bulk curing barn is arranged:
referring to fig. 3, the area of the roof, excluding the area occupied by the flat-plate solar collector, for the arrangement of the solar cell panel group is about 840m2And is divided into 5 areas, namely an area 1: 100m × 6m and an area 2, 3, 4 and 5: 5m × 12 m.
The specification of a single solar panel is that the solar panel is 1037mm, × mm long, 526mm wide, × mm thick, 35mm heavy, 7.4kg heavy and the power is about 80W.
1045 panels (11 rows × columns and 95 columns) can be arranged in the area 1, and × 4 panels (23 rows × columns and 5 columns) can be arranged in the areas 2, 3, 4 and 5, and 460 panels are arranged in total, and the solar radiation intensity is about 0.82kW/m per hour on average in day2When the average sunshine hours is 5 hours, the daily power generation amount of the solar cell panel group is about 600 kW.h.
The installation inclination angle of the solar cell panel group is 15 degrees, and the solar cell panel group faces the south and can fully absorb solar radiation energy.
(2) Kunming area 9: 00-15: the solar radiation intensity in the 00 illumination time period is about 0.5-0.9 kW/m2When the solar illumination is weak, the radiation intensity is about 0.5 kW/m2During the process, the solar thermal module can supply heat to the baking room by about 10.8kW through calculation, the maximum power required by the single baking room in the early baking period is 16.7kW, so that the solar photovoltaic module is required to supply power by about 6kW, and the power of the electric heater is selected to be 10kW in consideration of the instability of solar illumination.
Referring to fig. 5, the electric heater is 10 parallel ceramic electric heating rods, which are arranged in parallel. The diameter of a single electric heating rod is 60mm, the length of the single electric heating rod is 600mm, and the power of the single electric heating rod is 1 kW. The ceramic material electric heating rod has the advantages of high heating speed, high heating efficiency and long service life.
The heating module of the natural gas hot blast stove is preliminarily designed:
(1) measuring and calculating the maximum power required in the tobacco leaf baking process:
for a single baking room, the maximum water loss amount in the baking process is about 60kg/h (at the later stage of color fixing, about 47 ℃), the required power is about 42kW, and the maximum heating power required by the system is about 50kW considering the heat of heating and dehumidifying air and the heat dissipation of the enclosure structure of the baking room.
(2) Hot blast stove module equipment model selection
The system selects a burner with corresponding power, namely a big-small two-section fire natural gas burner with the nameplate output of 5 ten thousand kilocalories, and can meet the tobacco leaf baking requirement.
The theoretical combustion temperature of the natural gas in the high-temperature combustion cylinder reaches 1800 ℃, 310 stainless steel is selected as the material, and the size is as follows: length 1m, inner diameter 0.5 m.
Referring to fig. 6a and 6b, according to calculation, the plate heat exchanger is 1m long × wide, 1m × wide and 0.4m high, and consists of 10 groups of plate sheets, 2 sheets are 1 group, smoke flows between the two plate sheets, air flows between the two groups of plate sheets, and the smoke and the air flow in a cross way for heat exchange.
The technical means disclosed in the invention scheme are not limited to the technical means disclosed in the above embodiments, but also include the technical scheme formed by any combination of the above technical features.
Claims (7)
1. The utility model provides a tobacco leaf primary flue-curing system of complementary energy supply of solar photothermal-photovoltaic-natural gas which characterized in that: the system comprises a bulk curing barn module, a solar photo-thermal heating module, a solar photovoltaic heating module, a natural gas hot blast stove heating module and an intelligent control module;
the bulk curing barn module comprises a tobacco containing chamber, a circulating fan, an air supply outlet, an air return inlet, a moisture exhaust outlet and an air supplement door; the circulating fan is arranged in the heating chamber, the heating chamber and the tobacco containing chamber are arranged adjacently, the heating chamber is communicated with the upper part of the tobacco containing chamber through an air supply port, the lower part of the heating chamber is communicated through an air return port, the air supplement door is arranged below the heating chamber, the moisture exhaust port is arranged below the tobacco containing chamber, and two groups of dry and wet bulb temperature sensors T1 and T2 are arranged in the tobacco containing chamber;
the solar photo-thermal heating module comprises a solar heat collector, a water tank, a water-air heat exchanger, a water pump P1, a valve V1, a water pump P2 and a valve V2; the solar heat collector is connected with a water tank through a circulating pipe, the water pump P1 and the valve V1 are arranged on the circulating pipe I, the water tank is connected with a water-air heat exchanger through a circulating pipe II, the circulating pipe II is provided with a water pump P2, a valve V2 and a temperature sensor T3, and the water-air heat exchanger is arranged in the heating chamber;
the solar photovoltaic heating module comprises a solar cell panel group, a photovoltaic inverter, an electric heater and an electric heater control switch; the solar cell panel group is connected with a national power grid and an electric heater through a photovoltaic inverter; the electric heater is arranged in the heating chamber, and the work/stop is realized by the on/off of the electric heater control switch;
the natural gas hot blast stove heating module comprises a natural gas burner, a high-temperature combustion cylinder and a two-stage heat exchanger which are arranged in a heating chamber, and the high-temperature combustion cylinder and the two-stage plate heat exchanger are sequentially arranged in series from top to bottom; the natural gas burner is arranged at the upper part of the side surface of the natural gas hot blast stove device and is connected with the high-temperature combustion cylinder;
the intelligent control module is respectively connected with the natural gas burner, the air supplement door, the circulating fan, the dry-wet bulb temperature sensors T1 and T2, the temperature sensor T3, the electric heater control switch, the water pump P1, the valve V1, the water pump P2 and the valve V2, and the operation switching among different heating systems is coordinated according to the heat demand of tobacco leaves.
2. The tobacco primary curing system with the complementary energy supply of solar photothermal, photovoltaic and natural gas as claimed in claim 1, wherein: the size in the cigarette containing chamber is 8m in length, 2.7m in width, 3.5m in height and 75.6m in volume3。
3. The tobacco primary curing system with the complementary energy supply of solar photothermal, photovoltaic and natural gas as claimed in claim 1, wherein: the solar thermal collector and the solar cell panel group are arranged on a roof platform of the bulk curing barn, the optimal installation inclination angle is 10 degrees reduced on the basis of local latitude, and the installation inclination angle faces south.
4. The tobacco primary curing system with the complementary energy supply of solar photothermal, photovoltaic and natural gas as claimed in claim 1, wherein: the water-air heat exchanger is a serpentine tube heat exchanger.
5. The tobacco primary curing system with the complementary energy supply of solar photothermal, photovoltaic and natural gas as claimed in claim 1, wherein: the electric heater is a plurality of ceramic electric heating rods connected in parallel and is horizontally arranged on the natural gas hot blast stove.
6. The tobacco primary curing system with the complementary energy supply of solar photothermal, photovoltaic and natural gas as claimed in claim 1, wherein: the circulating fan is a double-speed axial flow fan with the power of 1.5kW/2.2kW, is arranged on the electric heater and is flush with the lower edge of the air supply outlet.
7. The tobacco primary curing system with the complementary energy supply of solar photothermal, photovoltaic and natural gas as claimed in claim 1, wherein: the operation method of the tobacco primary curing system comprises the following steps:
(1) the first operation condition is as follows: when the water temperature of the water tank is 30 ℃ higher than the baking temperature of the tobacco filling chamber, the solar photothermal module supplies heat independently; the working principle is as follows: hot water in the solar thermal collector enters a water tank, the hot water in the water tank enters a water-air heat exchanger to exchange heat with low-temperature air for primary tobacco leaf baking, the temperature of the heated air is increased, the hot air is sent into a tobacco containing chamber from an air supply opening through a circulating fan, the circulating water returns to the water tank after the temperature of the circulating water is reduced, and then the circulating water enters the solar thermal collector to be heated again;
(2) and a second operation condition: when the water temperature of the water tank is 15-30 ℃ higher than the baking temperature of the tobacco filling chamber, the solar thermal module and the solar photovoltaic module supply heat together; the working principle of the solar photovoltaic heating module is as follows: when the water temperature of the water tank is detected to be 15-30 ℃ higher than the baking temperature, the control switch of the electric heater is closed, the electric heater starts to work after being electrified, the air flowing out of the water-air heat exchanger is heated again, and the hot air is sent into the cigarette containing chamber from the air supply opening through the circulating fan;
(3) and the operation working condition is three: when the water temperature of the water tank is 0-15 ℃ higher than the baking temperature of the tobacco filling chamber or the water temperature of the water tank is lower than the baking temperature, the solar photothermal module stops supplying heat, the solar photovoltaic module stops supplying power, and the natural gas hot blast stove module independently supplies heat; the working principle is as follows: the natural gas is ignited in the natural gas burner and then sprayed into the high-temperature combustion cylinder, the natural gas is combusted in the high-temperature combustion cylinder, the generated high-temperature flue gas sequentially enters the two-stage plate heat exchanger to exchange heat with low-temperature air, and hot air is sent into the smoke containing chamber from the air supply opening through the circulating fan;
(4) and the operation working condition is four: when the tobacco is not cured, the solar photothermal module provides domestic hot water for nearby residents;
(5) the operation working condition is five: when the tobacco is not cured, the solar photovoltaic module generates electric energy and continuously incorporates the electric energy into a national power grid.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010263675.0A CN111493348A (en) | 2020-04-07 | 2020-04-07 | Tobacco leaf primary curing system with complementary energy supply of solar photo-thermal, photovoltaic and natural gas |
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| CN202010263675.0A CN111493348A (en) | 2020-04-07 | 2020-04-07 | Tobacco leaf primary curing system with complementary energy supply of solar photo-thermal, photovoltaic and natural gas |
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| CN111493348A true CN111493348A (en) | 2020-08-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112841698A (en) * | 2021-01-19 | 2021-05-28 | 河南省烟草公司南阳市公司 | Tobacco leaf bulk curing barn capable of switching natural gas and coal heating modes |
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| CN108477659A (en) * | 2018-03-12 | 2018-09-04 | 湖南科技大学 | The interior circulation condensed roasting room of multi-energy complementation |
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| GB2015317A (en) * | 1977-10-24 | 1979-09-12 | Natural Energy Converters Ltd | Apparatus for curing tobacco |
| CN101317689A (en) * | 2008-07-22 | 2008-12-10 | 梅娟 | Baking apparatus |
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| CN207214638U (en) * | 2017-07-06 | 2018-04-10 | 徐俊伟 | A kind of solar drying kiln |
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