Wet bulb temperature control device for bulk curing barn

Abstract

The utility model relates to a bulk curing barn wet bulb temperature control device which comprises a bulk curing barn body internally provided with an upper shed wet bulb temperature sensor, at least one water vapor conveying pipeline is arranged on a middle tobacco hanging frame of the bulk curing barn body, and the water vapor conveying pipeline extends in the length direction of the bulk curing barn body. The water vapor conveying pipeline is connected with the water vapor supply assembly, and water vapor output holes are distributed in the peripheral side part of the water vapor conveying pipeline; the upper shed wet bulb temperature sensor is electrically connected with the water vapor supply assembly through the control unit, the control unit receives a signal of the upper shed wet bulb temperature sensor and compares the signal with a preset value, and when the detection value of the upper shed wet bulb temperature sensor is lower than the preset value, the control unit controls the water vapor supply assembly to be started. The structure of an existing bulk curing barn is not changed, installation is convenient, the requirement of tobacco growers for improving the wet bulb temperature goodness of fit in the middle and later periods of curing is met, the problem that humidity control in the middle and later periods of curing is not timely and inaccurate is solved, and the tobacco curing quality is effectively improved.

Description

Technical field:

[0002] The utility model relates to a wet-bulb temperature control device for a concentrated baking room. Background technology:

[0004] Tobacco leaf baking is a key link in the formation of flue-cured tobacco quality. At present, how to further improve tobacco leaf quality and homogenization production level, meet the needs of industrial enterprises for high-quality raw materials, improve tobacco leaf production efficiency and benefits, and increase tobacco farmers' income has become the current direction of tobacco leaf production work.

[0005] The three elements of the baking process include dry-bulb temperature, wet-bulb temperature, and time. Among them, the appropriate wet-bulb temperature is one of the important conditions for the biochemical reaction of the internal components and the material transformation in tobacco leaf baking. In the later stage of color fixation, the inconsistency of wet-bulb temperature will have a great impact on the quality of tobacco leaves, which is not conducive to the formation of key indicators such as aroma substances and oil content of high-quality tobacco leaves, and then affect the appearance quality and grade of tobacco leaves. Under the current purchase policy, it will ultimately affect the economic benefits of tobacco farmers. At present, the adjustment of the wet-bulb temperature inside the baking room is mainly carried out by adjusting the size of the cold air inlet, the size of the exhaust window, and controlling the fan speed. However, these methods have the disadvantages of untimely control effect and inaccurate temperature control, especially in the middle and late stages of baking, the wet-bulb temperature is prone to be too low, which has a great impact on the quality of tobacco leaves. Therefore, tobacco farmers have the need to improve the consistency of the wet-bulb temperature baking process in the middle and late stages of tobacco leaf baking.

[0006] Intensive curing room is a special equipment for intensive curing and processing of tobacco leaves. It is generally composed of a tobacco loading room, a hot air room, a heating system, a ventilation and dehumidification and hot air circulation system, a temperature and humidity control system, etc. Its basic characteristics are a large tobacco loading density (more than twice the density of an ordinary curing room), the use of fans for forced ventilation and hot air circulation, and automatic temperature and humidity control.

[0007] At present, there are three main methods for dense flue-curing houses to increase the wet-bulb temperature in the middle and late stages of tobacco leaf baking to match the baking process, namely adjusting the cold air inlet, adjusting the dehumidification window, and adjusting the fan gear. However, through humidification measures such as adjusting the cold air inlet, dehumidification window and fan gear, the number of baking times with inconsistent wet-bulb temperature has decreased since the dry-bulb temperature reached 50°C in the middle and late stages of baking, but it still cannot meet the needs of tobacco farmers and is lower than 75% of the enterprise standard. For this reason, how to improve the control of wet-bulb temperature in the middle and late stages of baking in dense flue-curing houses and improve the consistency of wet-bulb temperature has become a technical problem that needs to be solved urgently, and this case was born. Utility model content:

[0009] The utility model makes improvements on the problems existing in the above-mentioned prior art, that is, the technical problem to be solved by the utility model is to provide a wet-bulb temperature control device for an intensive baking room, which has a reasonable design and is convenient for controlling the wet-bulb temperature in the middle and late stages of baking in the intensive baking room, thereby improving the wet-bulb temperature consistency.

[0010] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a dense baking room wet-bulb temperature control device, including a dense baking room body with an upper shelf wet-bulb temperature sensor arranged inside, the middle smoke hanging rack of the dense baking room body is provided with at least one water vapor conveying pipe, the water vapor conveying pipe extends along the length direction of the dense baking room body, the water vapor conveying pipe is connected with the water vapor supply component, and the circumferential part of the water vapor conveying pipe is provided with water vapor output holes; the upper shelf wet-bulb temperature sensor is electrically connected to the water vapor supply component through a control unit, the control unit receives the signal of the upper shelf wet-bulb temperature sensor and compares it with a preset value, when the detection value of the upper shelf wet-bulb temperature sensor is lower than the set value, the control unit controls the water vapor supply component to start.

[0011] Furthermore, the water vapor supply component includes a humidifier, and a water mist output end of the humidifier is connected to one end of a water vapor delivery pipeline through a pipeline.

[0012] Furthermore, it also includes an air supply fan, the air outlet end of which is connected to the water mist output end of the humidifier to pressurize the water mist generated by the humidifier and send it into the water vapor delivery pipeline.

[0013] Furthermore, the humidifier is an ultrasonic humidifier.

[0014] Furthermore, the air supply fan is a centrifugal fan.

[0015] Furthermore, a plurality of water vapor output holes are provided at both the left and right ends of the peripheral side of the water vapor delivery pipe, the plurality of water vapor output holes are distributed at intervals along the axial direction of the water vapor delivery pipe, and the water vapor output holes penetrate along the radial direction of the water vapor delivery pipe.

[0016] Furthermore, the water vapor delivery pipeline forms a plurality of humidifying sections along the axial direction from the inside to the outside, each humidifying section has a plurality of water vapor output holes evenly spaced, and the spacing between the water vapor output holes of the plurality of humidifying sections decreases from the inside to the outside.

[0017] Furthermore, there are two water vapor delivery pipes, and the two water vapor delivery pipes are arranged in parallel at the top and the bottom.

[0018] Furthermore, the water vapor delivery pipeline is a stainless steel pipeline.

[0019] Compared with the prior art, the utility model has the following effects: the utility model has a simple and reasonable structural design, does not change the structure of the existing intensive curing room, is easy to install and easy to operate, and realizes uniform distribution of water vapor in the curing room, meeting the tobacco farmers' needs for improving the consistency of wet-bulb temperature in the middle and late stages of curing, and solves the problem of untimely and inaccurate humidity control in the middle and late stages of curing in the past, effectively improving the curing quality of tobacco leaves. Description of the drawings:

[0021] Figure 1 This is a schematic diagram of the main cross-sectional structure of an embodiment of the utility model.

[0022] Figure 2 It is a three-dimensional structural schematic diagram of an embodiment of the utility model;

[0023] Figure 3 It is a schematic diagram of the structure of the water vapor supply component in the embodiment of the utility model;

[0024] Figure 4 It is a schematic diagram of the structure of the water vapor delivery pipeline in the embodiment of the utility model;

[0025] Figure 5 It is a cross-sectional schematic diagram of a water vapor delivery pipeline in an embodiment of the utility model;

[0026] Figure 6 This is a schematic diagram of the installation of a water vapor delivery pipeline in another embodiment of the utility model. Figure 1 ;

[0027] Figure 7 yes Figure 6 Schematic top view of . Specific implementation method:

[0029] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0030] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0031] like Figures 1 to 5As shown, the utility model is a dense baking room wet-bulb temperature control device, comprising a dense baking room body 1 with an upper shelf wet-bulb temperature sensor 3 arranged inside a smoke loading chamber 2, the middle smoke hanging rack 14 of the dense baking room body smoke loading chamber is provided with at least one water vapor conveying pipe 4, the water vapor conveying pipe 4 extends along the length direction of the dense baking room body, the water vapor conveying pipe 4 is connected with a water vapor supply component, the circumferential part of the water vapor conveying pipe 4 is provided with water vapor output holes 5, the water vapor supply component conveys water vapor to the water vapor conveying pipe 4, and the water vapor is output to the inside of the dense baking room along the water vapor output holes; the upper shelf wet-bulb temperature sensor 3 is electrically connected to the water vapor supply component through a control unit, the control unit receives the detection value of the upper shelf wet-bulb temperature sensor 3 and compares it with a preset value, when the detection value of the upper shelf wet-bulb temperature sensor 3 is lower than the set value, the control unit controls the water vapor supply component to start, so as to realize the transportation of water vapor to the inside of the dense baking room body and increase the humidity inside the dense baking room body.

[0032] In this embodiment, the water vapor supply component includes a humidifier 6, and the water mist output end of the humidifier 6 is connected to one end of the water vapor delivery pipeline 4 through a pipeline 7. Further, it also includes an air supply fan 8, and the air outlet end of the air supply fan 8 is connected to the water mist output end of the humidifier 6 to pressurize the water mist generated by the humidifier and send it into the water vapor delivery pipeline. It should be noted that the humidifier and the air supply fan can be arranged outside the dense baking room body.

[0033] In this embodiment, the humidifier 6 is an existing ultrasonic humidifier, which mainly uses high-frequency oscillation, and then through the high-frequency vibration of the atomizing sheet, the water in the humidifier is thrown off the water surface to produce floating water mist, thereby achieving the purpose of air humidification. The use of an ultrasonic humidifier can meet the humidification needs, and the atomized water vapor will not cause excessive humidity, thereby avoiding steaming and spoiling of tobacco leaves.

[0034] In this embodiment, the air supply fan 8 is an existing centrifugal fan, which is a ventilation, air exchange or air supply device. It accelerates the gas by using a high-speed rotating impeller, and converts kinetic energy into potential energy (pressure) by changing the flow direction of the gas, thereby achieving the purpose of exhausting the gas. The centrifugal fan is used for air supply to ensure that there is sufficient pressure to transport the water vapor through the pipeline to the smoke loading chamber of the dense baking room body.

[0035] In this embodiment, Figure 5 As shown, a plurality of water vapor output holes 5 are provided at both the left and right ends of the circumferential side of the water vapor delivery pipe 4. The plurality of water vapor output holes 5 are spaced apart along the axial direction of the water vapor delivery pipe 4, and the water vapor output holes are penetrated along the radial direction of the water vapor delivery pipe. By distributing the water vapor output holes at the left and right ends of the water vapor delivery pipe, the humidification is more uniform, and the steaming and blackening of the slices are effectively avoided.

[0036] In this embodiment, the water vapor delivery pipe 4 adopts a pipe of equal diameter, and the water vapor delivery pipe 4 forms a plurality of humidification sections 9 from the inside to the outside along the axial direction, and each humidification section 9 has a plurality of water vapor output holes evenly spaced, and the spacing between the water vapor output holes of the plurality of humidification sections decreases from the inside to the outside. Figure 4 As shown, the distance between two adjacent water vapor output holes at the inner end of the water vapor transmission pipe is larger, while the distance between two adjacent water vapor output holes at the outer end of the water vapor output pipe (the end close to the baking door of the dense curing room body) is smaller, that is, the water vapor output holes on the entire water vapor transmission pipe form a sparse inside and dense outside distribution form, so that the water vapor is evenly distributed in the dense curing room body. The water vapor output method will not cause the tobacco leaves to become moist or waterlogged, and can replenish the humidity in the curing room to meet the changes in tobacco leaves.

[0037] In this embodiment, there are two water vapor delivery pipes 4, and the two water vapor delivery pipes are arranged in parallel at the top and bottom. Specifically: the middle hanging smoke rack includes a plurality of beams spaced from top to bottom, and a plurality of vertical poles are fixed between the plurality of beams. Among the two water vapor delivery pipes, the upper water vapor delivery pipe is arranged above the beam at the middle position, and the two are spaced a certain distance vertically; the lower water vapor delivery pipe is arranged above the beam at the lower end position, and the two are spaced a certain distance vertically.

[0038] In this embodiment, the water vapor delivery pipeline 4 is a stainless steel pipeline.

[0039] In this embodiment, the control unit can adopt an existing single chip microcomputer or PLC. It should be noted that the entire device has a controller with a display screen, and the control unit is integrated in the controller.

[0040] In this embodiment, the water vapor delivery pipe 4 can be welded and fixed to the middle smoke supporting frame of the smoke loading chamber.

[0041] In another embodiment, if Figure 6 , 7 As shown, in addition to being welded, the water vapor delivery pipe can also be connected to the middle cigarette rack of the smoke chamber through a connector. Specifically, the connector includes a connector seat 10, one end of which has a through hole 11 for the water vapor delivery pipe 4 to pass through, and the side wall of the through hole can be threadedly connected with a set screw for locking the water vapor delivery pipe; the other end of the connector seat 10 has a vertically penetrating notch 12, which is used to slide vertically with the vertical pole 141 of the middle cigarette rack 14, so as to facilitate the vertical adjustment of the position of the water vapor delivery pipe; the side wall of the notch 12 is threaded with a locking bolt 13 for locking the connector seat 10 to the vertical pole of the middle cigarette rack. The use of a connector to achieve a detachable connection between the water vapor delivery pipe and the middle cigarette rack can facilitate the adjustment of the height of the water vapor delivery pipe as needed.

[0042] The advantages of the utility model are: (1) the structural design is simple and reasonable, and the structure of the existing curing room is not changed. The installation is convenient and the operation is simple. After installation, it does not affect the tobacco farmers' tobacco leaf curing operation and can improve the tobacco leaf quality. (2) The water vapor output holes on the water vapor transmission pipeline form a sparse inside and dense outside distribution form, so that the water vapor is evenly distributed in the dense curing room body. The water vapor output method will not cause the tobacco leaves to become wet or waterlogged, and can replenish the humidity in the curing room to meet the changes in tobacco leaves.

[0043] In this embodiment, after small-scale promotion and application, the tobacco leaves are "yellow, soft and fragrant" after baking, which effectively improves the baking efficiency and the quality of tobacco leaves, has been well received by tobacco farmers, and also meets the needs of industrial enterprises for high-quality raw materials.

[0044] If the present invention discloses or involves components or structures that are fixedly connected to each other, then, unless otherwise stated, the fixed connection can be understood as: a detachable fixed connection (for example, connection using bolts or screws), and can also be understood as: a non-detachable fixed connection (for example, riveting, welding). Of course, the mutual fixed connection can also be replaced by an integrated structure (for example, manufactured by one-piece molding using a casting process) (except where it is obviously impossible to use an one-piece molding process).

[0045] In addition, unless otherwise stated, the terms used to indicate positional relationships or shapes in any of the technical solutions disclosed in the above utility model include states or shapes that are approximate, similar or close thereto.

[0046] Any component provided by the utility model can be assembled from multiple separate components, or can be a separate component manufactured by an integrated molding process.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the utility model can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the utility model, which should be included in the scope of the technical solution for protection of the utility model.

Claims

1. A device for controlling wet-bulb temperature of a dense baking room, comprising a dense baking room body with an upper shelf wet-bulb temperature sensor disposed therein, characterized in that: The middle smoke hanging rack of the dense baking room body is provided with at least one water vapor conveying pipe, and the water vapor conveying pipe extends along the length direction of the dense baking room body, and is connected to the water vapor supply component, and water vapor output holes are distributed on the circumferential side of the water vapor conveying pipe; the upper shelf wet-bulb temperature sensor is electrically connected to the water vapor supply component through the control unit, and the control unit receives the signal of the upper shelf wet-bulb temperature sensor and compares it with a preset value. When the detection value of the upper shelf wet-bulb temperature sensor is lower than the set value, the control unit controls the water vapor supply component to start.

2. The device for controlling wet-bulb temperature of a concentrated baking room according to claim 1, characterized in that: The water vapor supply component comprises a humidifier, and the water mist output end of the humidifier is connected to one end of the water vapor delivery pipeline through a pipeline.

3. The device for controlling wet-bulb temperature of a concentrated baking room according to claim 2, characterized in that: It also includes an air supply fan, the air outlet end of which is connected to the water mist output end of the humidifier to pressurize the water mist generated by the humidifier and send it into the water vapor delivery pipeline.

4. The device for controlling wet-bulb temperature of a dense baking room according to claim 2 or 3, characterized in that: The humidifier is an ultrasonic humidifier.

5. The device for controlling wet-bulb temperature of a concentrated baking room according to claim 3, characterized in that: The air supply fan is a centrifugal fan.

6. The device for controlling wet-bulb temperature of a concentrated baking room according to claim 1, characterized in that: The left and right ends of the circumferential side of the water vapor delivery pipe are both provided with a plurality of water vapor output holes, the plurality of water vapor output holes are distributed at intervals along the axial direction of the water vapor delivery pipe, and the water vapor output holes penetrate along the radial direction of the water vapor delivery pipe.

7. The device for controlling wet-bulb temperature of a concentrated baking room according to claim 6, characterized in that: The water vapor delivery pipeline forms a plurality of humidifying sections from the inside to the outside along the axial direction, each humidifying section has a plurality of water vapor output holes evenly spaced, and the spacing between the water vapor output holes of the plurality of humidifying sections decreases from the inside to the outside.

8. The device for controlling wet-bulb temperature of a concentrated baking room according to claim 1, characterized in that: There are two water vapor delivery pipes, and the two water vapor delivery pipes are arranged in parallel at the top and the bottom.

9. The device for controlling wet-bulb temperature of a concentrated baking room according to claim 1, 3, 6, 7 or 8, characterized in that: The water vapor delivery pipeline is a stainless steel pipeline.

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