Biomass particle flue-cured tobacco equipment modified based on automatic coaling flue-cured tobacco equipment

Abstract

The invention relates to the technical field of tobacco leaf processing equipment, and discloses biomass particle flue-cured tobacco equipment modified based on automatic coaling flue-cured tobacco equipment, and the automatic coaling flue-cured tobacco equipment comprises a charging part comprising a charging hopper, a combustion part comprising a furnace bar and an air blower, and a temperature control system comprising a charging controller; a feeding frame is additionally arranged on the feeding hopper, and the section size of the feeding frame is consistent with the opening size of the feeding hopper; a combustion mold is additionally arranged on the furnace bar and comprises a material guide channel, a combustion channel connected with the material guide channel and an air inlet formed in the combustion channel; the reference feeding time length of the feeding controller is changed, the operation period of the air blower is determined according to the reference feeding time length, the reference feeding interval is determined according to the reference feeding time length and the operation period, multiple control modes are formed according to the reference feeding time length and the reference feeding interval, and the reference feeding time length and the operation period are both accurate to the second level. Biomass particle flue-cured tobacco is achieved with low transformation cost on the basis of exerting the value of existing equipment.

Description

Technical Field

[0001] This application relates to the technical field of tobacco leaf processing equipment, and particularly to a biomass pellet-fired flue-curing equipment based on the transformation of automatic coal-feeding flue-curing equipment. Background Art

[0002] Automatic coal-feeding flue-curing equipment has become the main equipment for tobacco leaf processing in each tobacco-growing area. The automatic coal-feeding flue-curing equipment can, to a certain extent, reduce the labor intensity of manually frequently adding coal fuel. However, during the tobacco leaf baking season, the soot, carbon oxides, sulfides, nitrogen oxides, etc. released intensively by coal combustion cause relatively large pollution to the surrounding environment. Therefore, it is imperative to change the use of coal as fuel in tobacco leaf processing.

[0003] Currently, each tobacco-growing area attempts to promote flue-curing equipment using clean energy sources such as heat pumps, electric heating, natural gas, and alcohol-based fuels as the heat supply source. However, the investment in new flue-curing equipment faces huge financial pressure, and there is also a large waste in replacing the existing automatic coal-feeding flue-curing equipment.

[0004] Therefore, there is an urgent need to propose a solution to transform the existing automatic coal-feeding flue-curing equipment at a low cost, give full play to the value of the existing automatic coal-feeding flue-curing equipment, and realize biomass pellet clean energy flue-curing. Summary of the Invention

[0005] To solve the above problems, the embodiments of this application provide a biomass pellet-fired flue-curing equipment based on the transformation of automatic coal-feeding flue-curing equipment. By performing low-cost transformation on the basis of the existing automatic coal-feeding flue-curing equipment, biomass pellet clean energy flue-curing can be realized, and the flue-curing effect is better.

[0006] The embodiments of this application adopt the following technical solutions:

[0007] This application provides a biomass pellet-fired flue-curing equipment based on the transformation of automatic coal-feeding flue-curing equipment. The automatic coal-feeding flue-curing equipment at least includes: a feeding component, a combustion component, and a temperature control system; the feeding component at least includes a feeding hopper, the combustion component at least includes a grate and a blower, and the temperature control system at least includes a feeding controller;

[0008] Add a feeding frame to the feeding hopper; wherein, the cross-sectional dimension of the feeding frame is the same as the open dimension of the feeding hopper;

[0009] Add a combustion mold to the grate; wherein, the combustion mold includes: a material guiding channel, a combustion channel connected to the material guiding channel, and an air inlet arranged in the combustion channel;

[0010] Change the reference feeding duration of the feeding controller, determine the operating cycle of the blower according to the reference feeding duration, determine the reference feeding interval according to the reference feeding duration and the operating cycle, and form multiple control modes according to the reference feeding duration and the reference feeding interval; wherein, both the reference feeding duration and the operating cycle are accurate to the second level.

[0011] Optionally, a connecting buckle is provided at the lower end of the feeding frame, and the feeding frame is fixed to the feeding hopper through the connecting buckle;

[0012] Alternatively, a plurality of mounting columns are distributed on the inner wall of the feeding frame, and the height of each mounting column exceeding the lower end of the feeding frame is equal to the height of the feeding hopper, and the feeding frame is fixed to the feeding hopper through the mounting columns.

[0013] Optionally, the material of the feeding frame is galvanized iron;

[0014] The material of the connecting buckle or the mounting column is galvanized steel.

[0015] Optionally, the material guiding channel includes: a first material guiding baffle, a second material guiding baffle, and a material guiding connecting plate connecting the first material guiding baffle and the second material guiding baffle;

[0016] The combustion channel includes: a first combustion baffle, a second combustion baffle, and a combustion connecting plate connecting the first combustion baffle and the second combustion baffle;

[0017] The first material guiding baffle is connected to the first combustion baffle, and the second material guiding baffle is connected to the second combustion baffle;

[0018] A plurality of air inlet holes are respectively distributed on the first combustion baffle and the second combustion baffle.

[0019] Optionally, the distance between the first combustion baffle and the second combustion baffle is greater than the distance between the first material guiding baffle and the second material guiding baffle.

[0020] Optionally, the material of the combustion mold is refractory steel.

[0021] Optionally, fixing components are provided outside the first material guiding baffle and the second material guiding baffle, and outside the first combustion baffle and the second combustion baffle.

[0022] Optionally, the materials of the fixing components include: refractory cement, fine sand, and crushed stones;

[0023] The mass ratio of refractory cement, fine sand, and crushed stones is 1:2:2.

[0024] Optionally, the control modes include a first control mode, a second control mode, and a third control mode;

[0025] When the current temperature is lower than the target temperature and the difference between the target temperature and the current temperature exceeds the threshold value, the changed feeding controller switches to the first control mode;

[0026] When the current temperature is lower than the target temperature and the difference between the target temperature and the current temperature does not exceed the threshold, the modified feeding controller switches to the second control mode;

[0027] When the current temperature is higher than the target temperature, the modified feeding controller switches to the third control mode.

[0028] Optionally, the first control mode is: the reference feeding interval and the reference feeding duration interval are arranged;

[0029] The second control mode is: the first actual feeding interval and the reference feeding duration interval are arranged; wherein, the first actual feeding interval includes the reference feeding interval and the first actual feeding sub-interval, the first actual feeding sub-interval is equal to the sum of the reference feeding interval and the first increment value, and the reference feeding interval and the first actual feeding sub-interval are arranged at intervals according to the arrangement order of the first actual feeding interval;

[0030] The third control mode is: the second actual feeding interval and the reference feeding duration are arranged at intervals in turn; wherein, the second actual feeding interval includes the first sub-interval of the second actual feeding and the second sub-interval of the second actual feeding, the first sub-interval of the second actual feeding is equal to the sum of the reference feeding interval and the second increment value, the second sub-interval of the second actual feeding is equal to the sum of the reference feeding interval and the third increment value, and the first sub-interval of the second actual feeding and the second sub-interval of the second actual feeding are arranged at intervals according to the arrangement order of the second actual feeding interval.

[0031] The above technical solutions adopted in the embodiments of the present application can achieve the following beneficial effects:

[0032] The biomass pellet-fired flue-cured tobacco equipment proposed in the present application based on the transformation of the automatic coal-feeding flue-cured tobacco equipment does not require power transformation and does not damage the original basic structure, and the construction cost of the curing barn and the labor cost for baking are extremely low.

[0033] The biomass pellet-fired flue-cured tobacco equipment proposed in the present application based on the transformation of the automatic coal-feeding flue-cured tobacco equipment can reduce the energy consumption cost and does not require cleaning of coal cinder, reducing the labor intensity of personnel.

[0034] The biomass pellet-fired flue-cured tobacco equipment proposed in the present application based on the transformation of the automatic coal-feeding flue-cured tobacco equipment can improve the appearance quality and sensory quality of the leaves after baking, and increase the proportion of superior-grade tobacco in the flue-cured tobacco after baking.

[0035] The biomass pellet-fired flue-cured tobacco equipment proposed in the present application based on the transformation of the automatic coal-feeding flue-cured tobacco equipment can reduce the total sugar content and reducing sugar content of the flue-cured tobacco leaves after baking, and the sugar-alkali ratio is more suitable.

[0036] The flue-curing equipment burning biomass particles based on the transformation of the automatic coal-feeding flue-curing equipment proposed in this application can be restored to the automatic coal-feeding flue-curing equipment by simply removing the feeding frame, removing the combustion mold, and restoring the feeding controller, thus realizing the "dual-energy" drive for baking. That is, it can choose either coal or biomass particles as the fuel, solving the problem of limited use of single coal. It is a relatively practical and feasible way in the transitional stage of replacing coal with new energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The drawings described herein are used to provide a further understanding of the present application, form a part of the present application, and the schematic embodiments and descriptions thereof are used to explain the present application without unduly limiting the present application. In the drawings:

[0038] Figure 1 The schematic diagram of the feeding frame structure according to an embodiment of the present application is shown;

[0039] Figure 2 The schematic diagram of the combustion mold structure according to an embodiment of the present application is shown;

[0040] Figure 3 The physical diagram of the combustion mold according to an embodiment of the present application is shown;

[0041] Figure 4 The combustion effect diagram of biomass particles after adding a combustion mold according to an embodiment of the present application is shown;

[0042] Figure 5 The schematic diagram of the first control mode of the changed feeding controller according to an embodiment of the present application is shown;

[0043] Figure 6 The schematic diagram of the second control mode of the changed feeding controller according to an embodiment of the present application is shown;

[0044] Figure 7 The schematic diagram of the third control mode of the changed feeding controller according to an embodiment of the present application is shown. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0045] To make the objectives, technical solutions, and advantages of the present application clearer, the technical solutions of the present application will be clearly and completely described below in conjunction with the specific embodiments of the present application and the corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the scope of protection of the present application.

[0046] The concept of this application lies in: transforming the existing automatic coal - feeding flue - cured tobacco equipment to improve it into a biomass pellet - burning flue - cured tobacco equipment. Therefore, based on the existing automatic coal - feeding flue - cured tobacco equipment for transformation, the automatic coal - feeding flue - cured tobacco equipment at least includes a feeding component, a combustion component, and a temperature control system. Other structures involved in the automatic coal - feeding flue - cured tobacco equipment are not the content of this application's transformation and will not be elaborated here.

[0047] The following will, in conjunction with the accompanying drawings, elaborate in detail on the technical solutions provided by each embodiment of this application.

[0048] The biomass pellet - burning flue - cured tobacco equipment proposed in the embodiment of this application, which is based on the transformation of the automatic coal - feeding flue - cured tobacco equipment, and the automatic coal - feeding flue - cured tobacco equipment at least includes: a feeding component, a combustion component, and a temperature control system. The feeding component at least includes a feeding hopper, the combustion component at least includes a grate and a blower, and the temperature control system at least includes a feeding controller;

[0049] A feeding frame 1 is added to the feeding hopper; wherein, the cross - sectional dimension of the feeding frame 1 is the same as the open - mouth dimension of the feeding hopper;

[0050] A combustion mold 2 is added to the grate; wherein, the combustion mold 2 includes: a material - guiding channel 21, a combustion channel 22 connected to the material - guiding channel 21, and an air inlet 23 arranged in the combustion channel 22;

[0051] Change the reference feeding duration of the feeding controller, determine the operation cycle of the blower according to the reference feeding duration, determine the reference feeding interval according to the reference feeding duration and the operation cycle, and form multiple control modes according to the reference feeding duration and the reference feeding interval; wherein, both the reference feeding duration and the operation cycle are accurate to the second level.

[0052] The embodiment of this application makes low - cost improvements to the feeding component, combustion component, and temperature control system of the automatic coal - feeding flue - cured tobacco equipment according to the environmental protection requirements of tobacco leaf baking in each tobacco area and the current situation of the existing automatic coal - feeding flue - cured tobacco equipment, so as to meet the needs of biomass pellet - burning flue - cured tobacco.

[0053] First, the improvement of the feeding component.

[0054] Please refer to Figure 1 , Figure 1 which shows the schematic structural diagram of the feeding frame of an embodiment of this application.

[0055] The embodiment of this application adds a feeding frame 1 to the feeding hopper of the automatic coal - feeding flue - cured tobacco equipment, thereby increasing the loading capacity of biomass pellets. Specifically, the cross - sectional dimension of the feeding frame 1 is the same as the open - mouth dimension of the feeding hopper.

[0056] In some cases, the opening of the feeding hopper of the automatic coal-feeding flue-cured tobacco equipment can be rectangular, and the cross-section of the feeding frame 1 is a rectangle with the same size as the opening of the feeding hopper. The surface of the feeding frame 1 is smooth, without protruding burrs and edges, so as to avoid limb injuries to personnel during use.

[0057] For example: the length of the feeding frame 1 is 60 cm, the width of the feeding frame 1 is 30 cm, and the height of the feeding frame 1 is 40 cm. Then the total loading capacity of the biomass particles can reach about 75 kg, and the feeding time is 4 - 6 hours.

[0058] In some alternative embodiments, in order to increase the stability of the feeding frame 1 when installed on the feeding hopper, a connecting buckle is provided at the lower end of the feeding frame 1, and the feeding frame 1 is fixed to the feeding hopper through the connecting buckle; alternatively, a plurality of mounting columns are distributed on the inner wall of the feeding frame 1, and the height of each mounting column exceeding the lower end of the feeding frame 1 is equal to the height of the feeding hopper, and the feeding frame 1 is fixed to the feeding hopper through the mounting columns.

[0059] In one way, a connecting buckle is provided at the lower end of the feeding frame 1, and the lower end of the feeding frame 1 and the opening of the feeding hopper are buckled together through the connecting buckle, so as to fix the feeding frame 1 to the feeding hopper and ensure the stability of the feeding frame 1.

[0060] In one way, a plurality of mounting columns are distributed on the inner wall of the feeding frame 1. For example, a plurality of mounting columns can be distributed at the four inner corners of the rectangular column-shaped feeding frame 1. The height of each mounting column exceeding the lower end of the feeding frame 1 is equal to the height of the feeding hopper. When the mounting column is inserted into the feeding hopper, the feeding frame 1 is fixed to the feeding hopper.

[0061] In some alternative embodiments, in order to increase the bearing capacity of the feeding frame 1, the material of the feeding frame 1 is galvanized iron; the material of the connecting buckle or the mounting column is galvanized steel.

[0062] For example, for the rectangular column-shaped feeding frame 1 including a plurality of mounting columns, the material of the feeding frame 1 can be galvanized iron sheet, and the material of the plurality of mounting columns can be galvanized angle steel.

[0063] First, the improvement of the combustion component.

[0064] Please refer to Figures 2 - 4 , Figure 2 which shows the structural schematic diagram of the combustion mold of an embodiment of the present application, Figure 3 which shows the physical diagram of the combustion mold of an embodiment of the present application, Figure 4 which shows the combustion effect diagram of the biomass particles after adding the combustion mold of an embodiment of the present application.

[0065] In the embodiments of the present application, a combustion mold 2 is added to the grate of the automatic coal-feeding flue-curing equipment, thereby increasing the combustion efficiency of biomass pellets. Specifically, the combustion mold 2 includes a material guiding channel 21, a combustion channel 22 connected to the material guiding channel 21, and an air inlet 23 provided in the combustion channel 22.

[0066] The combustion mold 2 mainly includes three parts: a material guiding channel 21, a combustion channel 22, and an air inlet 23.

[0067] In some alternative embodiments, the material guiding channel 21 includes a first material guiding baffle 211, a second material guiding baffle 213, and a material guiding connecting plate 212 connecting the first material guiding baffle 211 and the second material guiding baffle 213; the combustion channel 22 includes a first combustion baffle 221, a second combustion baffle 223, and a combustion connecting plate 222 connecting the first combustion baffle 221 and the second combustion baffle 223; the first material guiding baffle 211 is connected to the first combustion baffle 221, and the second material guiding baffle 213 is connected to the second combustion baffle 223; a plurality of air inlet holes 231 are respectively distributed on the first combustion baffle 221 and the second combustion baffle 223.

[0068] The material guiding channel 21 may include a first material guiding baffle 211 on the first side and a second material guiding baffle 213 on the second side, and the first material guiding baffle 211 is perpendicularly connected to the material guiding connecting plate 212, and the second material guiding baffle 213 is perpendicularly connected to the material guiding connecting plate 212.

[0069] The combustion channel 22 may include a first combustion baffle 221 on the first side and a second combustion baffle 223 on the second side, and the first combustion baffle 221 is perpendicularly connected to the combustion connecting plate 222, and the second combustion baffle 223 is perpendicularly connected to the combustion connecting plate 222.

[0070] The first material guiding baffle 211 and the first combustion baffle 221 are integrally connected, and the second material guiding baffle 213 and the second combustion baffle 223 are integrally connected.

[0071] The air inlet 23 is provided on the first combustion baffle 221 and the second combustion baffle 223. In order to increase the smoothness of the air inlet of the air inlet 23, the air inlet 23 may include a plurality of distributed air inlet holes 231.

[0072] In some alternative embodiments, in order to further improve the combustion efficiency, the distance between the first combustion baffle 221 and the second combustion baffle 223 is greater than the distance between the first material guiding baffle 211 and the second material guiding baffle 213.

[0073] Since the distance between the first combustion baffle 221 and the second combustion baffle 223 is greater than the distance between the first material guiding baffle 211 and the second material guiding baffle 213, the first material guiding baffle 211 and the first combustion baffle 221 can be connected into one body in a stepped form, and the second material guiding baffle 213 and the second combustion baffle 223 can be connected into one body in a stepped form.

[0074] For example: The heights of both the first material guiding baffle 211 and the second material guiding baffle 213 are 14 cm, and the lengths are both 17 cm. The distance between the first material guiding baffle 211 and the second material guiding baffle 213 is 13 cm. The heights of both the first combustion baffle 221 and the second combustion baffle 223 are 14 cm, and the lengths are both 35 cm. The distance between the first combustion baffle 221 and the second combustion baffle 223 is 15 cm. At a position 5 cm away from the end of the first combustion baffle 221 far from the first material guiding baffle 211, 5 air inlet holes 231 with a pore diameter of 2 mm are arranged at intervals of 5 cm. At a position 5 cm away from the end of the second combustion baffle 223 far from the second material guiding baffle 213, 5 air inlet holes 231 with a pore diameter of 2 mm are arranged at intervals of 5 cm.

[0075] In some alternative embodiments, to improve the heat resistance of the combustion mold 2, the material of the combustion mold 2 is refractory steel.

[0076] For example, the materials of the first material guiding baffle 211, the second material guiding baffle 213, the material guiding connecting plate 212, the first combustion baffle 221, the second combustion baffle 223, and the combustion connecting plate 222 are all refractory steel plates, and the thickness of the refractory steel plates is 3 mm.

[0077] In some alternative embodiments, to improve the anti-deformation property of the combustion mold 2, fixing components are provided outside the first material guiding baffle 211 and the second material guiding baffle 213, and outside the first combustion baffle 221 and the second combustion baffle 223.

[0078] Outside the first material guiding baffle 211 and the second material guiding baffle 213, fixing components made of building materials can be used for reinforcement, and outside the first combustion baffle 221 and the second combustion baffle 223, fixing components made of building materials can be used for reinforcement to further prevent the combustion mold 2 from deforming during the heating process. The fixing components at least expose the air inlet 23.

[0079] In some alternative embodiments, to balance the heat resistance and stability of the fixing components, the materials of the fixing components include: refractory cement, fine sand, and gravel; the mass ratio of refractory cement, fine sand, and gravel is 1:2:2.

[0080] Add fine sand and gravel to refractory cement according to the mass ratio, and attach them to the outside of the first material guiding baffle 211 and the second material guiding baffle 213, and the outside of the first combustion baffle 221 and the second combustion baffle 223 in a flowing state, exposing the position of the air inlet 23, and then solidify and build to form a fixed component.

[0081] After adding the combustion mold 2, the combustion of biomass particles is more concentrated, improving the combustion efficiency.

[0082] Third, the improvement of the temperature control system.

[0083] Please refer to Figures 5 - 7 , Figure 5 which shows a schematic diagram of the first control mode of the changed feeding controller in an embodiment of the present application, Figure 6 which shows a schematic diagram of the second control mode of the changed feeding controller in an embodiment of the present application, Figure 7 which shows a schematic diagram of the third control mode of the changed feeding controller in an embodiment of the present application.

[0084] The embodiment of the present application changes the feeding controller of the automatic coal-fired flue-curing equipment, and reset the reference feeding duration and control mode, so as to further improve the temperature control accuracy.

[0085] The feeding controller of the existing automatic coal-fired flue-curing equipment can only set the feeding duration and feeding interval in minutes. For example, the feeding cycle of the existing automatic coal-fired flue-curing equipment is 3-9 minutes. In order to adapt to the combustion situation of biomass particles, the changed feeding controller sets the reference feeding duration in seconds, determines the operation cycle of the blower according to the reference feeding duration, determines the reference feeding interval according to the reference feeding duration and the operation cycle, and thus forms a variety of control modes according to the reference feeding duration and the reference feeding interval. Then the feeding controller can adjust the control mode according to the heat demand in the curing barn.

[0086] The changed feeding controller controls the feeding component to achieve automatic feeding operation according to the control mode during the tobacco leaf curing process. The operator needs to set the reference feeding duration.

[0087] The duration of each feeding is based on the reference feeding duration parameter. The reference feeding duration parameter is fixed.

[0088] The interval duration between two feeding operations is based on the actual feeding interval parameter, and the actual feeding interval parameter is calculated according to the reference feeding interval and the control mode. And the reference feeding interval is calculated according to the reference feeding duration and the operation cycle of the blower.

[0089] The duration of one cycle of the blower operation is the cumulative duration during which the biomass particles fed during one reference feeding duration are fully combusted. That is to say, there is a restrictive relationship among the reference feeding duration, the reference feeding interval, and the duration of one cycle of the blower operation. After the operator sets the reference feeding duration, the cumulative duration during which the biomass particles fed during one reference feeding duration are fully combusted is determined. Based on the cumulative duration during which the biomass particles fed during one reference feeding duration are fully combusted, the duration of one cycle of the blower operation is determined. The difference between the duration of one cycle of the blower operation and the reference feeding duration is the reference feeding interval.

[0090] In some alternative embodiments, the control modes include a first control mode, a second control mode, and a third control mode; when the current temperature is lower than the target temperature and the difference between the target temperature and the current temperature exceeds the threshold value, the modified feeding controller switches to the first control mode; when the current temperature is lower than the target temperature and the difference between the target temperature and the current temperature does not exceed the threshold value, the modified feeding controller switches to the second control mode; when the current temperature is higher than the target temperature, the modified feeding controller switches to the third control mode.

[0091] The control modes can be divided into three types.

[0092] The application scenario of the first control mode is: the current temperature is lower than the target temperature, and the difference between the target temperature and the current temperature exceeds the threshold value. That is, the application scenario of the first control mode is that the current temperature is far from reaching the target temperature. At this time, the first control mode needs to control rapid temperature increase.

[0093] The application scenario of the second control mode is: the current temperature is lower than the target temperature, and the difference between the target temperature and the current temperature does not exceed the threshold value. That is, the application scenario of the second control mode is that the current temperature is close to the target temperature. At this time, the second control mode needs to control stable temperature increase.

[0094] The application scenario of the third control mode is: the current temperature is higher than the target temperature. That is, the application scenario of the third control mode is that the current temperature is too high. At this time, the third control mode needs to control temperature decrease.

[0095] In some alternative embodiments, the first control mode is that the reference feeding intervals and the reference feeding durations are arranged at intervals in sequence; the second control mode is that the first actual feeding intervals and the reference feeding durations are arranged at intervals in sequence; wherein, the first actual feeding interval includes the reference feeding interval and the first actual sub-feeding interval, the first actual sub-feeding interval is equal to the sum of the reference feeding interval and the first increment value, and the reference feeding interval and the first actual sub-feeding interval are arranged at intervals according to the arrangement order of the first actual feeding interval; the third control mode is that the second actual feeding intervals and the reference feeding durations are arranged at intervals in sequence; wherein, the second actual feeding interval includes the first sub-interval of the second actual feeding and the second sub-interval of the second actual feeding, the first sub-interval of the second actual feeding is equal to the sum of the reference feeding interval and the second increment value, the second sub-interval of the second actual feeding is equal to the sum of the reference feeding interval and the third increment value, and the first sub-interval of the second actual feeding and the second sub-interval of the second actual feeding are arranged at intervals according to the arrangement order of the second actual feeding interval.

[0096] Refer to Figure 5 Illustrate the first control mode by way of example.

[0097] The reference feeding duration is 20 s, the operation cycle of the blower is 60 s, and the reference feeding interval is 40 s.

[0098] Under the first control mode, cyclic control is performed according to feeding for 20 s, interval for 40 s, feeding for 20 s, interval for 40 s, feeding for 20 s, interval for 40 s.

[0099] That is to say, under the first control mode, the actual feeding time and the actual feeding interval of each feeding cycle are fixed.

[0100] Refer to Figure 6 Illustrate the second control mode by way of example.

[0101] The reference feeding duration is 20 s, the operation cycle of the blower is 60 s, the reference feeding interval is 40 s, and the first increment value is 10 s.

[0102] Under the second control mode, cyclic control is performed according to feeding for 20 s, interval for 40 s, feeding for 20 s, interval for 50 s, feeding for 20 s, interval for 40 s.

[0103] That is to say, under the second control mode, the actual feeding time of each feeding cycle is fixed, the actual feeding interval of each feeding cycle is variable, and the variable actual feeding interval and the reference feeding interval do not differ much.

[0104] Refer to Figure 7 Illustrate the third control mode by way of example.

[0105] The reference feeding duration is 20 s, the operation cycle of the blower is 60 s, the reference feeding interval is 40 s, the second increase value is 50 s, and the third increase value is 20 s.

[0106] In the third control mode, periodic control is performed according to feeding for 20 s, interval for 90 s, feeding for 20 s, interval for 60 s, feeding for 20 s, and interval for 90 s.

[0107] That is to say, in the third control mode, the actual feeding time of each feeding cycle is fixed, the actual feeding interval of each feeding cycle is variable, and the variable actual feeding interval varies greatly from the reference feeding interval.

[0108] Through multiple control modes and the feeding controller settings accurate to the second level, the temperature error between the baking room temperature of the coal-to-biomass particle intensive baking room and the target temperature can be within plus or minus 0.5 degrees (the temperature error between the baking room temperature of the conventional coal-fired intensive baking room and the target temperature is 1.5 degrees). Precise temperature control can better meet the requirements of the tobacco leaf baking process.

[0109] Example 1

[0110] Example 1 was carried out in the baking room group of Xuancheng Huwan Tobacco Science and Technology Park in June 2022. Example 1 processed tobacco leaves in parallel through the following 5 types of baking rooms.

[0111] T1: Existing automatic coal-feeding tobacco baking equipment (i.e., conventional coal-fired intensive baking room);

[0112] T2: Biomass particle-fired tobacco baking equipment (i.e., coal-to-biomass particle intensive baking room) proposed in the embodiment of the present application based on the transformation of automatic coal-feeding tobacco baking equipment;

[0113] T3: Transformation of a conventional coal-fired intensive baking room into a biomass burner intensive baking room;

[0114] T4: Transformation of a conventional coal-fired intensive baking room into a heat pump intensive baking room;

[0115] T5: Transformation of a conventional coal-fired intensive baking room into an electric heating tube intensive baking room.

[0116] The following Table 1 shows the heating facility parameters of the 5 types of baking rooms.

[0117] Table 1:

[0118]

[0119]

[0120] I. Construction and baking labor costs of 5 types of baking rooms.

[0121] The following Table 2 shows the construction and baking labor costs of the 5 types of baking rooms.

[0122] Table 2:

[0123]

[0124] The biomass burner intensive curing barn does not require power transformation, but the original basic structure needs to be damaged, such as cutting and smashing the heating chamber and furnace, and setting the access port for the combustion head of the biomass burner.

[0125] Both the heat pump intensive curing barn and the electric heating tube intensive curing barn require power transformation. For example, a heat pump evaporator is installed in the heating chamber of the heat pump intensive curing barn.

[0126] The coal-to-biomass pellet intensive curing barn does not require power transformation and does not damage the original basic structure. The construction and baking labor costs of the curing barn are extremely low.

[0127] II. Energy consumption of 5 types of curing barns.

[0128] Table 3 below shows the energy consumption statistics of 5 types of curing barns.

[0129] Table 3:

[0130]

[0131] Among them, the unit price of electricity is calculated at 0.57 yuan / kW˙h.

[0132] The coal-to-biomass pellet intensive curing barn, the biomass burner intensive curing barn, the heat pump intensive curing barn, and the electric heating tube intensive curing barn can all reduce the energy consumption cost compared with the conventional coal-fired intensive curing barn. The total energy consumption cost per curing barn of the coal-to-biomass pellet intensive curing barn is similar to that of the biomass burner intensive curing barn. The coal-to-biomass pellet intensive curing barn, the biomass burner intensive curing barn, the heat pump intensive curing barn, and the electric heating tube intensive curing barn do not need to clean the coal cinder compared with the conventional coal-fired intensive curing barn, reducing the labor intensity of personnel.

[0133] The tested variety in Example 1 is Yunyan 97, and the experimental field is in the core demonstration area of Shanghai-Anhui Tobacco Science and Technology Park. The field cultivation level, the degree of leaf maturity and yellowing, and the quality of fresh tobacco leaves are the same. The tobacco leaves treated in different curing barns are harvested at the same time with the same part of the tobacco leaves, with 350 clips for loading, 13 kg per clip, and 3 layers of loading. The specifications of different curing barns are the same. The length × width × height of the heating chamber is 1500 mm × 1500 mm × 3500 mm, and the length × width × height of the loading chamber is 8000 mm × 2700 mm × 3500 mm. The biomass pellets are provided by Xuancheng Hongyu Bioenergy Co., Ltd., and the specifications of the biomass pellets are cylindrical with a length of 4 cm and a diameter of 6 mm. The harvesting and baking of Yunyan 97 are carried out according to the standards.

[0134] Table 4 below shows the tobacco leaf baking process of Yunyan 97.

[0135] Table 4:

[0136]

[0137]

[0138] III. Evaluation of the Appearance Quality of Flue-cured Tobacco after Curing in 5 Types of Flue-curing Barns

[0139] The appearance quality of the flue-cured tobacco marked with 9 clamps after curing in 5 types of flue-curing barns was evaluated. Table 5 below shows the appearance quality scores of C3F flue-cured tobacco after curing in 5 types of flue-curing barns

[0140] Table 5:

[0141]

[0142] Compared with the conventional coal-fired bulk curing barn, the biomass pellet bulk curing barn converted from coal, the biomass burner bulk curing barn, the heat pump bulk curing barn and the electric heating pipe bulk curing barn can all improve the appearance quality of flue-cured tobacco after curing. The appearance quality score of the flue-cured tobacco in the biomass pellet bulk curing barn converted from coal can reach the same level as that of the biomass burner bulk curing barn

[0143] IV. Grade Structure of Flue-cured Tobacco after Curing in 5 Types of Flue-curing Barns

[0144] The flue-cured tobacco after curing was graded according to the national standard of flue-cured tobacco GB2635-92, and the proportions of upper, middle and lower grade tobacco were calculated

[0145] Table 6 below shows the grade structure of flue-cured tobacco after curing in 5 types of flue-curing barns

[0146] Table 6:

[0147] Number Proportion of superior cigarettes (%) Proportion of medium cigarettes (%) Proportion of inferior cigarettes (%) T1 61.55 29.60 8.85 T2 64.57 29.50 5.93 T3 64.25 30.74 5.01 T4 66.45 28.20 5.35 T5 67.29 28.55 4.16

[0148] Compared with the conventional coal-fired bulk curing barn, the proportions of upper grade tobacco in the biomass pellet bulk curing barn converted from coal, the biomass burner bulk curing barn, the heat pump bulk curing barn and the electric heating pipe bulk curing barn have all increased, and the proportions of lower grade tobacco have all decreased. The proportion of upper grade tobacco in the biomass pellet bulk curing barn converted from coal is higher than that in the biomass burner bulk curing barn, and it has increased by more than 3 percentage points compared with the conventional coal-fired bulk curing barn

[0149] V. Chemical Components of Flue-cured Tobacco after Curing in 5 Types of Flue-curing Barns

[0150] Conventional chemical component analysis (including nicotine, total sugar, reducing sugar, total nitrogen, potassium, chlorine, nitrogen) was carried out on the 9 clamps of representative flue-cured tobacco after curing in 5 types of flue-curing barns after removing the green and miscellaneous tobacco

[0151] Table 7 below shows the chemical components of C3F flue-cured tobacco after curing in 5 types of flue-curing barns

[0152] Table 7:

[0153]

[0154] Compared with the cured tobacco from other types of curing barns, the cured tobacco from the biomass pellet-intensive curing barn converted from coal has lower total sugar and reducing sugar contents, while the nicotine, total nitrogen, potassium, and chlorine contents are not significantly different. The ratio of reducing sugar to nicotine is more suitable for the biomass pellet-intensive curing barn converted from coal and the heat pump-intensive curing barn.

[0155] VI. Sensory quality evaluation of cured tobacco from 5 types of curing barns.

[0156] Table 8 below shows the sensory quality scores of C3F cured tobacco from 5 types of curing barns.

[0157] Table 8:

[0158]

[0159] The cured tobacco from different curing barns is of strong aroma type. The sensory quality scores of the cured tobacco from the biomass pellet-intensive curing barn converted from coal, the biomass burner-intensive curing barn, the heat pump-intensive curing barn, and the electric heating tube-intensive curing barn are all higher than those of the conventional coal-intensive curing barn.

[0160] Example 2

[0161] Comparison of energy consumption costs between the biomass pellet-intensive curing barn converted from coal and the conventional coal-intensive curing barn in different tobacco stations.

[0162] Table 9 below shows the energy consumption costs of the biomass pellet-intensive curing barn converted from coal and the conventional coal-intensive curing barn in different tobacco stations.

[0163] Table 9:

[0164]

[0165] When different tobacco stations use the biomass pellet-intensive curing barn converted from coal, the energy consumption cost can be reduced by 181.38 - 485.00 yuan per curing barn compared with the conventional coal-intensive curing barn, with an average reduction of 300.68 yuan per curing barn, and the baking fuel cost is significantly reduced.

[0166] It can be seen that by transforming the feeding component, combustion component, and temperature control system of the conventional coal-intensive curing barn, biomass pellet flue-cured tobacco can be achieved at a very low transformation cost while giving full play to the value of existing equipment.

[0167] The biomass pellet flue-cured tobacco equipment proposed in this application based on the transformation of the automatic coal-feeding flue-cured tobacco equipment does not require power transformation and does not damage the original basic structure, and the construction cost of the curing barn and the labor cost for baking are extremely low.

[0168] The biomass pellet flue-cured tobacco equipment proposed in this application based on the transformation of the automatic coal-feeding flue-cured tobacco equipment can reduce the energy consumption cost and does not require cleaning of coal cinder, thus reducing the labor intensity of personnel.

[0169] The biomass pellet-fired flue-curing equipment proposed in this application, which is based on the transformation of the automatic coal-feeding flue-curing equipment, can improve the appearance quality and sensory quality of the cured leaves, and increase the proportion of top-grade tobacco in the cured tobacco.

[0170] The biomass pellet-fired flue-curing equipment proposed in this application, which is based on the transformation of the automatic coal-feeding flue-curing equipment, can reduce the total sugar content and reducing sugar content of the cured tobacco leaves, and the sugar-alkali ratio is more appropriate.

[0171] The biomass pellet-fired flue-curing equipment proposed in this application, which is based on the transformation of the automatic coal-feeding flue-curing equipment, can be restored to the automatic coal-feeding flue-curing equipment by simply removing the feeding frame, removing the combustion mold, and restoring the feeding controller, thus realizing the "dual-energy" drive for baking. That is, it can choose either coal combustion or biomass pellet combustion, solving the problem of limited single coal use, and is a relatively practical and feasible way in the transitional stage of replacing coal with new energy.

[0172] The above are only the embodiments of this application and are not intended to limit this application. For those skilled in the art, various changes and modifications can be made to this application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included within the scope of this application.

Claims

1. A flue-curing equipment burning biomass pellets based on the transformation of automatic coal-feeding flue-curing equipment, the automatic coal-feeding flue-curing equipment at least includes: Feeding component, combustion component and temperature control system; the feeding component at least includes a feeding hopper, the combustion component at least includes a grate and a blower, and the temperature control system at least includes a feeding controller; characterized in that, A feeding frame is additionally provided on the feeding hopper; wherein, the cross-sectional dimension of the feeding frame is the same as the open dimension of the feeding hopper; A combustion mold is additionally provided on the grate; wherein, the combustion mold includes: a material guiding channel, a combustion channel connected to the material guiding channel, and an air inlet arranged in the combustion channel; Change the reference feeding duration of the feeding controller, determine the operation cycle of the blower according to the reference feeding duration, determine the reference feeding interval according to the reference feeding duration and the operation cycle, and form multiple control modes according to the reference feeding duration and the reference feeding interval; wherein, both the reference feeding duration and the operation cycle are accurate to the second level.

2. The flue-cured tobacco equipment burning biomass particles based on the transformation of the automatic coal-feeding flue-cured tobacco equipment according to claim 1, characterized in that, A connecting buckle is arranged at the lower end of the feeding frame, and the feeding frame is fixed on the feeding hopper through the connecting buckle; Alternatively, a plurality of mounting columns are distributed on the inner wall of the feeding frame, and the height of each mounting column exceeding the lower end of the feeding frame is equal to the height of the feeding hopper, and the feeding frame is fixed on the feeding hopper through the mounting columns.

3. The biomass pellet fired tobacco curing equipment based on the transformation of the automatic coal feeding tobacco curing equipment according to claim 2, wherein, The material of the feeding frame is galvanized iron; The material of the connecting buckle or the mounting column is galvanized steel.

4. The biomass pellet fired tobacco curing equipment based on the transformation of the automatic coal feeding tobacco curing equipment according to claim 1, characterized in that, The material guiding channel includes: a first material guiding baffle, a second material guiding baffle, and a material guiding connecting plate connecting the first material guiding baffle and the second material guiding baffle; The combustion channel includes: a first combustion baffle, a second combustion baffle, and a combustion connecting plate connecting the first combustion baffle and the second combustion baffle; The first material guiding baffle is connected to the first combustion baffle, and the second material guiding baffle is connected to the second combustion baffle; A plurality of air inlet holes are respectively distributed on the first combustion baffle and the second combustion baffle.

5. The flue-cured tobacco equipment burning biomass particles based on the transformation of the automatic coal-feeding flue-cured tobacco equipment according to claim 4, characterized in that, The distance between the first combustion baffle and the second combustion baffle is greater than the distance between the first material guiding baffle and the second material guiding baffle.

6. The flue-cured tobacco equipment burning biomass particles based on the transformation of the automatic coal-feeding flue-cured tobacco equipment according to claim 1, characterized in that, The material of the combustion mold is refractory steel.

7. The flue-cured tobacco equipment burning biomass particles based on the transformation of the automatic coal-feeding flue-cured tobacco equipment according to claim 4, characterized in that, Fixing components are arranged outside the first material guiding baffle and the second material guiding baffle, and outside the first combustion baffle and the second combustion baffle.

8. The biomass pellet-fired flue-cured tobacco equipment based on the transformation of the automatic coal-feeding flue-cured tobacco equipment according to claim 7, characterized in that, The materials of the fixing components include: refractory cement, fine sand and gravel; The mass ratio of the refractory cement, the fine sand and the gravel is 1:2:

2.

9. The biomass pellet fired flue-curing equipment based on the transformation of the automatic coal-feeding flue-curing equipment according to claim 1, characterized in that, The control modes include a first control mode, a second control mode and a third control mode; When the current temperature is lower than the target temperature and the difference between the target temperature and the current temperature exceeds the threshold value, the changed feeding controller switches to the first control mode; When the current temperature is lower than the target temperature and the difference between the target temperature and the current temperature does not exceed the threshold value, the changed feeding controller switches to the second control mode; When the current temperature is higher than the target temperature, the changed feeding controller switches to the third control mode.

10. The biomass pellet-fired flue-cured tobacco equipment based on the transformation of the automatic coal-feeding flue-cured tobacco equipment according to claim 9, characterized in that, The first control mode is: the reference feeding interval and the reference feeding duration are arranged at intervals in sequence; The second control mode is as follows: the first actual feeding interval and the reference feeding duration are arranged at intervals in turn; wherein, the first actual feeding interval includes the reference feeding interval and the first actual sub-feeding interval, the first actual sub-feeding interval is equal to the sum of the reference feeding interval and the first increment value, and the reference feeding interval and the first actual sub-feeding interval are arranged at intervals according to the arrangement order of the first actual feeding interval; The third control mode is as follows: the second actual feeding interval and the reference feeding duration are arranged at intervals in turn; wherein, the second actual feeding interval includes the first sub-interval of the second actual feeding and the second sub-interval of the second actual feeding, the first sub-interval of the second actual feeding is equal to the sum of the reference feeding interval and the second increment value, the second sub-interval of the second actual feeding is equal to the sum of the reference feeding interval and the third increment value, and the first sub-interval of the second actual feeding and the second sub-interval of the second actual feeding are arranged at intervals according to the arrangement order of the second actual feeding interval.

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