Online layering and loosening method for tobacco bale

Abstract

The online layering and loosening and moisturizing method of tobacco bales comprises the following steps: the whole rectangular tobacco bale is divided into 3-4 tobacco blocks, and the tobacco blocks are arranged in a straight line; the tobacco blocks are sent to the moisturizing device to increase the moisture content of the tobacco blocks by 1% to 2%; after the tobacco blocks pass through a plurality of pairs of horizontal loosening rollers and vertical loosening rollers, the tobacco blocks are loosened into tobacco leaves or small tobacco blocks; the loosened tobacco leaves or small tobacco blocks are conveyed to the constant flow system by the conveying belt to accurately control the flow; and the loosened tobacco leaves or small tobacco blocks are sent to the drum-type moisturizing machine by the vibrating conveyor.

Description

Technical Field

[0001] This invention belongs to the field of tobacco processing technology. It relates to an online layering and loosening method for tobacco bales, and in particular to an online layering and loosening rehumidification method for tobacco bales, which improves the uniformity of moisture content at the outlet of a drum-type rehumidifier. Background Technology

[0002] The raw material for preparing tobacco shreds in the tobacco processing workshop comes from tobacco bales at the threshing and re-drying plant. These bales are compressed and packaged into 200kg bales using hydraulic equipment for storage and transportation. This process is known in the industry as pre-compression packaging, and these bales are relatively tightly packed. Typically, the shape of the re-dried tobacco bales is a cuboid, defined by its length, width, and height. The tobacco leaves in the re-dried bales are layered, with the layer direction parallel to the plane formed by the length and width directions of the bale and perpendicular to the height direction. The first step in the tobacco processing line is to loosen and rehydrate the opened tobacco bales. Currently, the main method used by various tobacco factories is to cut a 200kg tobacco bale three or four times along its length using a vertical slicer (hereinafter referred to as the slicer), dividing the bale into four or five pieces. Each piece weighs approximately 50kg or 40kg, and then the pieces are conveyed into a drum rehydration machine for heating and humidification, ultimately resulting in loose tobacco leaves with a certain temperature and humidity. However, this method has the following problems:

[0003] Because the tobacco leaves have a low moisture content after being transported, and the slicer's blade cuts downwards perpendicular to the tobacco bale layers, there is significant fragmentation during this process. Furthermore, the downward vertical cutting requires a large cutting force, necessitating frequent blade replacements and resulting in high energy consumption for the slicer.

[0004] In addition, the more times the tobacco pack is cut, the larger the fragments become, which limits the tobacco pack to being cut only three or four times. It also results in a large weight of tobacco blocks, with each block weighing about 50 kg or 40 kg, which is not conducive to subsequent heating and humidification processes.

[0005] Furthermore, these tobacco blocks, weighing approximately 50kg or 40kg, are continuously tumbled and broken apart by rakes or lifting plates after entering the drum-type rehumidifier, ultimately achieving the process of warming and humidifying the loosened tobacco leaves. However, due to the large size of the tobacco blocks, many lumps of tobacco leaves remain after rehumidification, and the material entering the drum is discontinuous, limiting the precision of moisture control and resulting in uneven moisture content at the output. Moreover, the tumbling and loosening of the tobacco blocks in the drum-type rehumidifier also causes some breakage, and the resulting broken leaves or tobacco dust are unusable, leading to economic losses. Summary of the Invention

[0006] The purpose of this invention is to provide an online layered loosening and rehydration method for cigarette packs, addressing the problems existing in the current process of loosening cigarette packs.

[0007] To achieve the purpose of this invention, the following technical solution is adopted:

[0008] This invention discloses an online layered loosening and rehumidification method for tobacco bales. The rectangular tobacco bales are formed by pressing layers of tobacco leaves together. These bales are sequentially fed into a drum-type rehumidifier via a first conveying device, a second conveying device, a tobacco bale loosening machine, a constant flow system, and a vibrating conveyor. A layering device is installed in the first conveying device; a rehumidification device is installed in the second conveying device. The tobacco bale loosening machine includes several horizontal loosening rollers and several vertical loosening rollers, with a conveyor belt located below the horizontal and vertical loosening rollers. The online layered loosening and rehumidification method for tobacco bales comprises the following steps:

[0009] (I) Layering of cigarette packs

[0010] Rectangular tobacco packs are intermittently conveyed on a first conveying device. The tobacco leaf layer of the tobacco pack is parallel to the conveying direction of the conveying device. A layering device is installed above the conveying device. The layering device descends and clamps 1 / 4 to 1 / 3 of the height of the rectangular tobacco pack from both sides of the top end. Then, the layering device rises and separates the tobacco blocks of 1 / 4 to 1 / 3 of the height from the entire rectangular tobacco pack. The clamped tobacco blocks are then placed in front of the conveying device. This process is repeated to divide the entire rectangular tobacco pack into 3-4 tobacco blocks, which are arranged in a straight line.

[0011] (II) The tobacco block becomes damp

[0012] The first conveying device sends the smoke block to the second conveying device. The rehumidification device is installed above the second conveying device. The rehumidification device sprays atomized water onto the smoke block, thereby increasing the moisture content of the smoke block by 1% to 2%.

[0013] (III) Loose tobacco blocks

[0014] The aforementioned tobacco clumps are conveyed by the second conveyor to its tobacco clump loosening machine for loosening. After passing through multiple pairs of horizontal and vertical loosening rollers, the tobacco clumps fall between the multiple pairs of horizontal or vertical loosening rollers onto the conveyor belt below, loosening into tobacco leaves or small tobacco clumps.

[0015] (iv) Loose tobacco leaves or small tobacco clumps are weighed.

[0016] Loose tobacco leaves or small tobacco clumps are conveyed by a conveyor belt to a constant flow system, which weighs the loose tobacco leaves or small tobacco clumps and precisely controls the flow rate.

[0017] (V) Tobacco leaves re-moistening

[0018] The loose tobacco leaves or small tobacco clumps are further loosened by a vibrating conveyor and then sent to a drum-type rehumidifier to rehumidify the tobacco leaves or small tobacco clumps. After rehumidification, the temperature of the tobacco leaves is 45-70℃ and the moisture content is 17-22%.

[0019] The present invention provides an online layering and loosening method for rehydration of cigarette packs, wherein the layering device is a clamp or a robotic arm with a clamping force of 30,000-40,000 N.

[0020] The present invention provides an online layered loosening and rehydration method for cigarette packs, wherein the first conveying device and the second conveying device are belt conveyors or chain conveyors.

[0021] The present invention provides an online layered loose rehydration method for tobacco packs, wherein the rehydration device consists of multiple atomizing nozzles, which spray steam to atomize water or compressed air to atomize water for preliminary rehydration of the tobacco packs.

[0022] The present invention provides an online layered loosening and rehydration method for cigarette packs, wherein the horizontal loosening roller and the vertical loosening roller are nail rollers.

[0023] The present invention provides an online layered loosening and rehydration method for cigarette packs, wherein the constant flow system comprises, in sequence, a lifting feeder, a metering tube, and an electronic belt scale.

[0024] The present invention provides an online layering and loosening method for rehydration of cigarette packs, wherein a cigarette pack position detector is installed below the layering device in the first conveying equipment.

[0025] The online layered loosening and rehydration method for cigarette packs of the present invention has the following beneficial effects:

[0026] This invention improves the loosening rate of tobacco bales in the pretreatment section of the tobacco processing line while reducing the breakage rate of tobacco leaves during this process, and promotes improved moisture uniformity in the subsequent rehumidification process. It replaces the traditional slicing and rehumidification loosening process, resulting in thinner tobacco bales. After the surface tobacco leaves are humidified, the bale loosening machine further loosens and rehumidifies them. Because the tobacco bales themselves are lightweight and the increased moisture content of the surface tobacco leaves improves their processing resistance, it helps reduce breakage during the loosening process, lowering the breakage rate by 1.5% ± 0.5% and improving raw material utilization. The tobacco leaves subsequently entering the drum-type rehumidifier under constant flow control have a flow variation coefficient of 0.15, resulting in higher precision in humidification water control, more uniform outlet moisture content, and a standard deviation of 0.1 for the outlet moisture content. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the system used in the online layered loosening and rehydration method for cigarette packs according to the present invention.

[0028] exist Figure 1In the diagram, number 1 represents a tobacco package; number 2 represents a tobacco block; number 3 represents the first conveying device; number 4 represents a stratification device; number 5 represents a rehumidification device; number 6 represents a tobacco block loosening machine; number 7 represents a constant flow system; number 8 represents a vibrating conveyor; number 9 represents a roller-type rehumidifier; number 10 represents the second conveying device; number 11 represents a conveyor belt; number 12 represents a horizontal loosening roller; number 13 represents a vertical loosening roller; and number 14 represents a tobacco package position detector. Detailed Implementation

[0029] To enable those skilled in the art to better understand the technical solution of the present invention, the specific embodiments are described in detail below with reference to the accompanying drawings.

[0030] like Figure 1 As shown, the online layered loosening and rehumidification method for tobacco packs of the present invention involves a rectangular tobacco pack 1 formed by pressing layers of tobacco leaves together. The tobacco pack 1 is sequentially fed into a drum-type rehumidification machine 9 via a first conveying device 3, a second conveying device 10, a tobacco clump loosening machine 6, a constant flow system 7, and a vibrating conveyor 8. A layering device 4 is installed in the first conveying device 3; a rehumidification device 5 is installed in the second conveying device 10. The tobacco clump loosening machine 6 includes several horizontal loosening rollers and several vertical loosening rollers. A conveyor belt 11 is located below the horizontal loosening rollers 12 and the vertical loosening rollers 13. The online layered loosening and rehumidification method for tobacco packs includes the following steps:

[0031] (I) The cigarette pack has 1 layer

[0032] A rectangular tobacco pack 1 is intermittently conveyed on a first conveying device 3. The tobacco leaf layer of the tobacco pack 1 is parallel to the conveying direction of the conveying device 3. A layering device 4 is installed above the conveying device 3. The layering device 4 descends and clamps 1 / 4 to 1 / 3 of the height of the rectangular tobacco pack 1 from both sides of the upper end. Then, the layering device 4 rises and separates the tobacco blocks 2 of 1 / 4 to 1 / 3 of the height from the entire rectangular tobacco pack 1. The clamped tobacco blocks 2 are then placed in front of the conveying device 3. The layering device 4 is a clamp or a robotic arm with a clamping force of 30,000-40,000 N. The entire rectangular tobacco pack is divided into 3-4 tobacco blocks 2 in this way. The tobacco blocks 2 are arranged in a straight line.

[0033] (II) The tobacco block (2) becomes damp

[0034] The first conveying device 3 conveys the smoke block 2 to the second conveying device 10. The rehumidification device 5 is installed above the second conveying device 10. The rehumidification device 5 consists of multiple atomizing nozzles. The atomizing nozzles spray steam to atomize water or compressed air to atomize water, and perform preliminary rehumidification on the smoke block 2, so that the moisture content of the smoke block 2 increases by 1% to 2%.

[0035] (III) Loose smoke block 2

[0036] The aforementioned tobacco clumps 2 are conveyed by the second conveying device 10 to its tobacco clump loosening machine 6 for loosening. The horizontal loosening rollers 12 and vertical loosening rollers 13 are nail rollers. After passing through multiple pairs of horizontal loosening rollers 12 and vertical loosening rollers 13, the tobacco clumps 2 fall from between the multiple pairs of horizontal loosening rollers 12 or vertical loosening rollers 13 onto the conveyor belt 11 below, loosening into tobacco leaves or small tobacco clumps.

[0037] (iv) Loose tobacco leaves or small tobacco clumps are weighed.

[0038] Loose tobacco leaves or small tobacco clumps are conveyed by conveyor belt 11 to constant flow system 7. Constant flow system 7 includes, in sequence: lifting feeder, metering tube and electronic belt scale. Constant flow system 7 weighs loose tobacco leaves or small tobacco clumps and accurately controls the flow rate.

[0039] (V) Tobacco leaves re-moistening

[0040] After being further loosened by the vibrating conveyor 8, the loose tobacco leaves or small tobacco clumps are sent to the drum rehumidifier (9) to rehumidify the tobacco leaves or small tobacco clumps. After rehumidification, the temperature of the tobacco leaves is 45-70℃ and the moisture content is 17-22%.

[0041] The first conveying device 3 and the second conveying device 10 are belt conveyors or chain conveyors. A cigarette pack position detector 14 is also installed below the layering device 4 within the first conveying device 3.

[0042] In summary, the advantages of this invention in specific embodiments are:

[0043] The present invention discloses an online layered loosening and rehydration method for tobacco bales. This method segments the re-dried tobacco bales into pieces by clamping them along their height, resulting in more sliced ​​tobacco blocks with lower breakage costs, thus reducing the breakage associated with traditional methods that use cutters to break the bales into smaller pieces. Using the process disclosed in this patent, each tobacco bale can be divided into 2-5 pieces or even more along its height. Furthermore, the clamping force required for layering from the bale layer direction is smaller, which helps reduce breakage during tobacco leaf tearing. Clamping the tobacco leaves also pre-loosens the tobacco bale. The resulting thinner slices are then loosened and rehydrated by a tobacco block loosening machine after the surface tobacco leaves are moistened. Because the tobacco blocks themselves are lightweight and the increased moisture content of the surface tobacco leaves improves processing resistance, breakage during the loosening process is reduced by 1.5% ± 0.5%, improving raw material utilization. The tobacco leaves that subsequently enter the drum-type rehumidifier are controlled by a constant flow system, with a flow variation coefficient of 0.15. This results in higher accuracy in controlling the humidification water, more uniform outlet moisture content, and a standard deviation of 0.1 for the outlet moisture content.

[0044] Finally, it should be noted that the specific embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above-described embodiments, and any changes can be made within the scope of knowledge possessed by those skilled in the art.

Claims

1. A method for on-line delamination and loosening of tobacco bales for conditioning, wherein rectangular tobacco bales (1) are formed by pressing tobacco leaves in layers, said bales (1) are fed in succession through a first conveying device (3) provided with delamination means (4), a second conveying device (10) provided with conditioning means (5), a tobacco bale loosening machine (6), a constant flow system (7) and a vibrating conveyor (8) into a drum conditioner (9), wherein said bale loosening machine (6) comprises: A plurality of horizontal loose rollers and a plurality of vertical loose rollers, a conveying belt (11) is located below the horizontal loose rollers (12) and the vertical loose rollers (13), characterized in that the method comprises the following steps: (I) Layering of the cigarette packets (1) The oblong cigarette packets (1) are intermittently conveyed on the first conveying device (3), the tobacco layers of the cigarette packets (1) are parallel to the conveying direction of the conveying device (3), a layering device (4) is arranged above the conveying device (3), the layering device (4) is lowered to clamp the oblong cigarette packets (1) from the two sides of the upper end of the oblong cigarette packets (1) by 1 / 4 to 1 / 3 of the height of the oblong cigarette packets (1), then the layering device (4) is raised to separate the tobacco blocks (2) of 1 / 4 to 1 / 3 of the height from the entire oblong cigarette packets (1), and the clamped tobacco blocks (2) are placed in front of the conveying device (3), and the entire oblong cigarette packets are divided into 3-4 tobacco blocks (2) in this way, and the tobacco blocks (2) are arranged in a straight line. (II) Moistening of the tobacco blocks (2) The tobacco blocks (2) are sent to the second conveying device (10) by the first conveying device (3), a moistening device (5) is arranged above the second conveying device (10), and the moistening device (5) sprays atomized water on the tobacco blocks (2) to increase the moisture content of the tobacco blocks (2) by 1% to 2%. (III) Loosening of the tobacco blocks (2) The tobacco blocks (2) are sent to the tobacco block loosening machine (6) by the second conveying device (10) for loosening, and the tobacco blocks (2) fall onto the conveying belt (11) below a plurality of pairs of horizontal loose rollers (12) and vertical loose rollers (13) after passing through the plurality of pairs of horizontal loose rollers (12) and vertical loose rollers (13) to be loosened into tobacco leaves or small tobacco blocks. (IV) Weighing of the loosened tobacco leaves or small tobacco blocks The loosened tobacco leaves or small tobacco blocks are conveyed to the constant flow system (7) by the conveying belt (11), the constant flow system (7) weighs the loosened tobacco leaves or small tobacco blocks to accurately control the flow. (V) Moistening of the tobacco leaves The loosened tobacco leaves or small tobacco blocks are further loosened by the vibrating conveyor (8) and then sent to the drum-type moistening machine (9) for moistening treatment, and after moistening, the temperature of the tobacco leaves is 45-70℃, and the moisture content is 17-22%.

2. The on-line layering and loosening method of bales of tobacco according to claim 1, characterized in that: The layering device (4) is a clamp or a mechanical hand, and the clamping force is 30000-40000N.

3. The on-line layering and loosening method of bales of tobacco according to claim 2, characterized in that: The first conveying device (3) and the second conveying device (10) are belt conveyors or chain plate conveyors.

4. The on-line layering and loosening method of bales of tobacco according to claim 3, characterized in that: The moistening device (5) is composed of a plurality of atomizing nozzles, the atomizing nozzles spray steam atomized water or compressed air atomized water to preliminarily moisten the tobacco blocks (2).

5. The on-line layering and loosening method of bales of tobacco according to claim 4, characterized in that: The horizontal loose rollers (12) and the vertical loose rollers (13) are spike rollers.

6. The on-line layering and loosening method of bales of tobacco according to claim 5, characterized in that: The constant flow system (7) sequentially comprises a lifting feeder, a metering pipe and an electronic belt scale.

7. The on-line layering and loosening method of bales of tobacco according to claim 6, characterized in that: A cigarette packet position detector (14) is arranged below the layering device (4) in the first conveying device (3).

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