CN218185160U

CN218185160U - Hot air control system of charging machine and tobacco processing system

Info

Publication number: CN218185160U
Application number: CN202222611395.1U
Authority: CN
Inventors: 吴玉生; 朱炜平; 张瑞琼; 林智聪
Original assignee: Xiamen Tobacco Industry Co Ltd
Current assignee: Xiamen Tobacco Industry Co Ltd
Priority date: 2022-09-29
Filing date: 2022-09-29
Publication date: 2023-01-03
Anticipated expiration: 2032-09-29

Abstract

The disclosure relates to a hot air control system of a charging machine and a tobacco processing system. Hot-blast control system of feeder includes: the charging machine is provided with a charging cover and a discharging cover; the air return pipe is provided with a second pipe end and a first pipe end communicated with the discharging cover; the air inlet pipe is provided with a third pipe end and a fourth pipe end communicated with the feeding cover; the two ends of the first hot air pipe are respectively communicated with the second pipe end and the third pipe end; the two ends of the second hot air pipe are respectively communicated with the second pipe end and the third pipe end, and the second hot air pipe is provided with a steam inlet for receiving the injected steam; a heater disposed on the first hot blast main and configured to heat an air flow passing through the first hot blast main; the circulating fan is arranged on the air return pipe and is configured to drive airflow in the air return pipe to flow to the air inlet pipe through at least one of the first hot air pipe and the second hot air pipe; and the control valve group is configured to independently control the on-off or the opening degree of the air door of the first hot air pipe and the second hot air pipe or perform linkage control.

Description

Hot air control system of charging machine and tobacco processing system

Technical Field

The disclosure relates to the field of tobacco processing, in particular to a hot air control system of a feeder and a tobacco processing system.

Background

The feeding process is a key link of cigarette shredding, and the main task of the process is to quantitatively add a certain proportion of exogenous substances to processed materials according to the design requirements of products, which is directly related to the sensory quality and the physical quality of cigarette products. In the feeding process, the material needs to be heated to improve the absorption rate of the material to exogenous substances, and whether the design of a hot air control system of the feeding machine reasonably and directly influences the heating effect of the material and finally influences the feeding effect of the working procedure.

Referring to fig. 1, in some related art, a feeder 2 'is provided downstream of a feed conveyor apparatus 1'. The material is sent into the feeder 2 'by the feeding conveying equipment 1', is sent to the discharging conveying equipment 3 'after the feeding processing of the feeder 2', and the feeding processing is finished. In the feeding process, the internal processing environment of the roller of the feeding machine 2' is heated through a hot air system. In fig. 1, the thermal energy of the hot blast system originates from three sources, on the one hand from the return air duct 4', on the other hand from the supplementary air duct 9', and on the other hand from the hot blast heater 7'. Hot air is injected into the roller through the hot air fan 8' to heat the materials, so that the mass transfer rate between the material liquid and the materials is improved.

SUMMERY OF THE UTILITY MODEL

The embodiment of the disclosure provides a hot air control system of a charging machine and a tobacco processing system, which can improve the charging process of the charging machine.

In one aspect of the present disclosure, there is provided a hot air control system of a charging machine, including:

the charging machine is provided with a charging cover and a discharging cover;

the air return pipe is provided with a first pipe end and a second pipe end, and the first pipe end is communicated with the discharge cover;

an air inlet pipe having a third pipe end and a fourth pipe end, the fourth pipe end being in communication with the feed hood;

the two ends of the first hot air pipe are respectively communicated with the second pipe end and the third pipe end;

a second hot air pipe, both ends of which are respectively communicated with the second pipe end and the third pipe end and are provided with steam inlets for receiving injected steam;

a heater disposed on the first hot blast main configured to heat an air flow passing through the first hot blast main;

the circulating fan is arranged on the air return pipe and is configured to drive airflow in the air return pipe to flow to the air inlet pipe through at least one of the first hot air pipe and the second hot air pipe; and

and the control valve group is connected with the first hot air pipe and the second hot air pipe and is configured to independently control the on-off or the opening degree of an air door of the first hot air pipe and the second hot air pipe or perform linkage control.

In some embodiments, the set of control valves comprises:

the first air damper is arranged on the first hot air pipe and is configured to adjust the on-off or air damper opening degree of the first hot air pipe; and

and the second air damper is arranged on the second hot air pipe and is configured to adjust the on-off or the opening degree of the air damper of the second hot air pipe.

In some embodiments, the sum of the opening degrees of the first damper and the second damper is configured to be maintained at a constant value.

In some embodiments, the first damper and the second damper are signal-interlocked or mechanically-interlocked.

In some embodiments, the constant value is 100%.

In some embodiments, the first tube end is located at an upper portion of the outfeed hood and the fourth tube end is located at a lower portion of the infeed hood.

In some embodiments, the return air duct has a folded section, a portion of the folded section adjacent the second tube end being located on an underside of the feeder.

In some embodiments, the highest portion of each of the first hot air duct and the second hot air duct is not higher than the lowest portion of the air inlet duct.

In some embodiments, the portion of the tube segment between the ends of the first hot air duct is higher than the portion of the tube segment between the ends of the second hot air duct.

In some embodiments, the hot air control system of the feeder further comprises:

a steam nozzle disposed at the steam inlet configured to communicate with a steam source; and

a steam flow adjusting device located upstream of the steam nozzle in a steam flow direction, configured to adjust a steam flow ejected from the steam nozzle.

In some embodiments, the return air duct has a bent section, a portion of the bent section adjacent to the second tube end is located at a lower side of the feeder, the circulation fan is disposed on a portion of the bent section adjacent to the second tube end, and a highest portion of each of the first hot air duct and the second hot air duct is not higher than a lowest portion of the air inlet duct.

a water discharge device which is provided with a water receiving port arranged at the lower side of the circulating fan,

wherein, the water receiving port is positioned at the lowest part of the bending pipe section.

In some embodiments, the charger comprises:

a frame;

the roller is rotatably arranged on the rack, and the two ends of the roller are respectively provided with the feeding cover and the discharging cover; and

a feed liquid nozzle disposed on or adjacent to the feed hood and configured to spray feed liquid onto the material entering the drum.

In some embodiments the material throwing position of the drum, the first pipe end and the fourth pipe end are all located on the same side of a reference plane, the axis of the drum is located in the reference plane, and the reference plane is perpendicular to the horizontal plane.

the return air temperature acquisition device is arranged on the return air pipe and is configured to acquire the temperature of airflow in the return air pipe;

and the air inlet temperature acquisition device is arranged on the air inlet pipe and is configured to acquire the temperature of the air flow in the air inlet pipe.

a feeding device located upstream of the charging machine in a material conveying direction and configured to input unfed material to the charging machine;

the discharging device is positioned downstream of the charging machine along the conveying direction of the materials and is configured to receive the charged materials output by the charging machine;

the moisture meter is arranged on the discharging device and is configured to detect the moisture content of the fed material on the discharging device;

the temperature meter is arranged on the discharging device and is configured to detect the temperature of the fed material on the discharging device.

In one aspect of the present disclosure, there is provided a tobacco processing system comprising:

the hot air control system of the feeder.

Therefore, according to the embodiment of the disclosure, the return air of the feeder is conveyed to the air inlet pipe communicated with the feeder feeding cover through the first hot air pipe and/or the second hot air pipe by the return air pipe communicated with the feeder discharging cover, so that the return air circulates in the equipment, the heat contained in the return air is more fully utilized, and the pollution of the return air to the environment is eliminated; the first hot air pipe and the second hot air pipe are arranged to respectively provide two types of hot air for return air heating and steam supplementation, and the on-off or air door opening degree of the first hot air pipe and the second hot air pipe can be controlled through the control valve group according to process requirements, so that the feeding process of the feeding machine is effectively improved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description, serve to explain the principles of the disclosure.

The present disclosure may be more clearly understood from the following detailed description, taken with reference to the accompanying drawings, in which:

FIG. 1 is a schematic structural diagram of a hot air control system of a feeder in some related art;

FIG. 2 is a schematic block diagram of some embodiments of a feeder hot air control system of the present disclosure;

fig. 3 is a schematic diagram of the left side view of fig. 2.

It should be understood that the dimensions of the various parts shown in the figures are not drawn to scale. Further, the same or similar reference numerals denote the same or similar components.

Detailed Description

Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative and is in no way intended to limit the disclosure, its application, or uses. The present disclosure may be embodied in many different forms and is not limited to the embodiments described herein. These embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that: the relative arrangement of parts and steps, the composition of materials, numerical expressions and numerical values set forth in these embodiments are to be construed as merely illustrative, and not restrictive, unless specifically stated otherwise.

The use of "first," "second," and similar terms in this disclosure is not intended to indicate any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element preceding the word covers the element listed after the word, and does not exclude the possibility that other elements are also covered. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

In the present disclosure, when a specific device is described as being located between a first device and a second device, there may or may not be intervening devices between the specific device and the first device or the second device. When a particular device is described as being coupled to other devices, that particular device may be directly coupled to the other devices without intervening devices or may be directly coupled to the other devices with intervening devices.

All terms (including technical or scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs unless specifically defined otherwise. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.

The inventor finds that when the material feeding machine in the related art feeds materials, due to the fact that the material liquid contains sticky substances such as saccharides and cocoa powder, scaling phenomenon can occur when hot air containing the material liquid passes through the hot air heater, heating efficiency of the hot air heater is poor, and therefore the temperature rising rate of the hot air is reduced, and the material feeding process is affected. The hot air exhausted from the air return pipe of the charging machine is mostly exhausted outside the equipment through the moisture exhausting device, so that the environmental pollution and the energy waste are caused, meanwhile, the preheating preparation time of the charging machine is long, the material temperature in the production process is slowly increased, and the production efficiency is low.

Fresh air in the environment is heated by the fresh air heater and then is supplemented into the hot air system through the air supplementing pipe, the enthalpy value of the dried hot air is low, the heat convection coefficient between the hot air and the material is small, and the heat transfer efficiency between the hot air and the material is low. The temperature of hot air at the thermometer is adjusted by adjusting the air quantity of the air supplement, and the fluctuation of the air pressure in the roller is inevitably caused, so that the hot air in the roller escapes outwards or the external cold air enters the roller.

In addition, the hot air temperature adjustment sensitivity is poor. When the temperature of the hot air is low or high, the temperature of the hot air needs to be adjusted by increasing or decreasing the steam flow of the hot air heater and/or the fresh air heater, and the hot air heater and the fresh air heater have large thermal inertia and serious adjustment delay.

In view of at least one technical problem in the related art, the embodiments of the present disclosure provide a hot air control system for a charger and a tobacco processing system, which can improve a charging process of the charger.

Fig. 2 is a schematic structural view of some embodiments of the feeder hot air control system of the present disclosure. Fig. 3 is a schematic diagram of the left side view of fig. 2. Referring to fig. 2 and 3, an embodiment of the present disclosure provides a hot air control system of a feeder, including: the device comprises a feeder 10, a return air duct 21, an air inlet duct 22, a first hot air duct 31, a second hot air duct 41, a heater 32, a circulating fan 23 and a control valve group.

The feeder 10 has a feed hood 11 and a discharge hood 12. The return air duct 21 has a first duct end and a second duct end, the first duct end communicating with the discharge hood 12. The air inlet pipe 22 has a third pipe end and a fourth pipe end, which communicates with the feed housing 11.

Both ends of the first hot air duct 31 are respectively communicated with the second duct end and the third duct end. Both ends of the second hot blast duct 41 are respectively communicated with the second tube end and the third tube end, and have steam inlets for receiving the injected steam.

The heater 32 is disposed on the first hot air duct 31 and configured to heat the air flow passing through the first hot air duct 31. The heater 32 may be a heat exchanger, an electric heater, or the like.

A circulation fan 23 is disposed on the return air duct 21 and configured to drive the air flow in the return air duct 21 to flow to the air inlet duct 22 through at least one of the first hot air duct 31 and the second hot air duct 41.

The control valve group is connected with the first hot air duct 31 and the second hot air duct 41 and is configured to independently control the on-off or the opening degree of the air door of the first hot air duct 31 and the second hot air duct 41 or perform linkage control.

According to the embodiment of the disclosure, the return air of the feeder is conveyed to the air inlet pipe communicated with the feeder feeding cover through the first hot air pipe or the second hot air pipe by the air return pipe communicated with the feeder discharging cover, so that the return air is circulated in the equipment. Compared with the related art, the embodiment of the disclosure can more fully utilize the heat contained in the return air, for example, the heat carried by the return air is used for preheating the feeder, so that the preheating preparation time of the feeder is shortened, the production efficiency is improved, and the pollution of the return air to the environment is eliminated; in addition, fresh air does not need to be supplemented, a moisture discharge device related to the fresh air supplement can be omitted, and energy waste caused by heating the fresh air and discharging moisture is saved.

Compared with the mode of heating fresh air in the environment by a hot air heater and supplementing a hot air system in the prior art, the heat enthalpy value of the steam is higher than that of dry hot air, so that higher heat transfer efficiency between the hot air and materials can be realized, the adjustment sensitivity of the temperature of the hot air can be improved by directly spraying the steam to heat the hot air in the production stage, and the control precision of the temperature of the hot air in the feeding process is improved.

The first hot air pipe and the second hot air pipe which are arranged between the return air pipe and the air inlet pipe can respectively provide two types of hot air for return air heating and steam supplementation, so that the on-off or air door opening degree of the first hot air pipe and the second hot air pipe can be controlled through the control valve group according to process requirements, the hot air can have proper heat energy, and the feeding process of the feeding machine is effectively improved.

For example, the second hot air pipe is selected to supply hot air containing steam in the production stage of the feeder, and the hot air supplied by the first hot air pipe is turned off or reduced, so that the hot air containing feed liquid can pass through the heater arranged in the first hot air pipe as little as possible in the production process, the scaling phenomenon of the feed liquid on the heater is avoided as much as possible, the heating efficiency and the heating effect of the heater are further ensured, the temperature regulation sensitivity of the heater can be ensured, the preheating preparation time of the feeder in the preheating stage is shortened, and the stability of the feeding quality in the production process is improved. And moreover, the material liquid contained in the return air can be transferred back to the material, so that the waste of the material liquid is further reduced.

Circulating fan can drive the return air in the return air pipe to flow to the air-supply line through at least one in first hot-blast main and the second hot-blast main when the operation, when realizing hot-blast flow drive, can also make ejection of compact cover remain stable little negative pressure, prevent to cause the inside wind pressure of feeder fluctuation because of mending wind from the environment among the correlation technique, avoid the wind pressure fluctuation to cause the risk of hot-blast exorbitant or outside cold air entering cylinder.

Referring to fig. 2, in some embodiments, the loader 10 comprises: a frame 13, a roller 14 and a feed liquid nozzle 15. The frame 13 may be provided on a workshop site. The roller 14 is rotatably arranged on the frame 13, the feeding cover 11 and the discharging cover 12 are respectively arranged at two ends of the roller, the roller 14 is sealed, and hot air, feed liquid or materials are prevented from escaping. Material entering from the feed hood 11, such as shredded tobacco material, can perform the feeding operation inside the drum 14. The drum 14 is capable of turning the material by rotation and transferring the material from the infeed hood 11 to the outfeed hood. The feeder 10 is not limited to use with rollers and may be used with other types of material handling.

The roller 14 can rotate around the central axis thereof under the supporting action of the frame 13, and the roller 14 can be arranged in a high-back manner (the right side is front, and the left side is back) and forms an inclination angle of 2-5 degrees with the horizontal plane. After the materials enter the roller 14 through the feeding cover 11, the materials are continuously lifted and thrown under the combined action of the continuous rotation of the roller 14 and the shoveling plates arranged in the roller, and the materials spirally advance from the front end to the rear end. In the material scattering process, the material liquid nozzle 15 continuously sprays material liquid to the material, and the absorption rate of the material liquid by the material is accelerated under the action of hot air. The material that has completed the charging and the absorption of the feed liquid in the drum 14 is discharged from the discharging hood 12.

A feed liquid nozzle 15 is provided on or adjacent to the feed hood 11 and is configured to spray feed liquid to the material entering the drum 14. The material liquid refers to exogenous substances which are required to be quantitatively added into processed materials according to product design requirements, such as spices and the like which can improve the sensory quality of cigarette products. The feed liquid nozzle 15 may provide feed liquid plumbing connections to intermittently or continuously spray atomized feed liquid onto material entering the feed hood 11.

Referring to fig. 3, in some embodiments the material throwing position of the drum 14, the first pipe end and the fourth pipe end are all located on the same side of a reference plane RP, the axis of the drum 14 is located within the reference plane RP, and the reference plane RP is perpendicular to the horizontal plane. Thus, the hot air is in full contact with the materials thrown from top to bottom, the hot air penetrates through the material gaps, and the heat energy of the hot air and the materials are subjected to heat exchange to the maximum extent and then enter the air return pipe 21.

Referring to fig. 2 and 3, in some embodiments, the feeder hot air control system further comprises: a feeding device 71, a discharging device 72, a moisture meter 73 and a temperature meter 74. The feeding device 71 is located upstream of the feeder 10 in the conveying direction of the material and is configured to feed unfed material to the feeder 10. An outfeed device 72 is located downstream of the feeder 10 in the direction of material transport and is configured to receive the fed material output by the feeder 10.

A moisture meter 73 is provided on the discharging device 72 and configured to detect the moisture content of the charged material on the discharging device 72. A temperature meter 74 is disposed on the outfeed device 72 and is configured to detect the temperature of the material being fed on the outfeed device 72.

The feeding device 71 and the discharging device 72 may each employ various types of conveyors, such as a belt conveyor or a vibrating conveyor, etc. The moisture meter 73 and the temperature meter 74 can respectively acquire the moisture content and the temperature of the fed material on the discharging device 72 so as to properly control the hot air control system of the feeding machine, thereby ensuring that the output material meets the requirements on the moisture content and the temperature.

To make the temperature control of the circulating hot air in the feeder more accurate, referring to fig. 2, in some embodiments, the feeder hot air control system further comprises: return air temperature acquisition device 61 and inlet air temperature acquisition device 62. The return air temperature collecting device 61 is disposed on the return air duct 21 and configured to collect the temperature of the air flow in the return air duct 21. An inlet air temperature collection device 62 is disposed on the inlet duct 22 and is configured to collect the temperature of the air flow in the inlet duct 22.

In the above embodiment, the control valve set can independently control or cooperatively control the on/off or the opening degree of the damper between the first hot air duct 31 and the second hot air duct 41. The independent control means that the control valve sets are independent from each other for controlling the on-off or the opening degree of the air door of the first hot air duct 31 and the second hot air duct 41. The linkage control means that the control valve group is associated with the on-off or air door opening control of the first hot air duct 31 and the second hot air duct 41, that is, the on-off or air door opening adjustment of the first hot air duct 31 affects the on-off or air door opening of the second hot air duct 41. The linkage control can be realized by mechanical linkage or signals.

Referring to fig. 2, in some embodiments, the control valve block includes: a first damper 51 and a second damper 52. The first damper 51 is disposed on the first hot air duct 31 and configured to adjust the opening/closing or the damper opening of the first hot air duct 31. The second damper 52 is disposed on the second hot air duct 41 and configured to adjust the opening/closing or the damper opening of the second hot air duct 41. The opening degree of the first damper 51 and the second damper 52 is adjustable, and when the opening degree is 0%, this corresponds to the dampers being in the off state, and when the opening degree is 100%, this corresponds to the dampers being in the maximum open state.

In order to realize the linkage control of the on/off of the first hot air duct 31 and the second hot air duct 41 and the opening degree of the damper, the sum of the opening degrees of the first damper 51 and the second damper 52 may be configured to be maintained at a constant value, for example, the sum of the opening degrees is 100%, 90%, 80%, or the like. By keeping the sum of the opening degrees of the first damper 51 and the second damper 52 at a constant value, the air pressure in the charging machine can be kept stable, and the escape of hot air in the charging machine can be avoided.

In an implementation form, the first damper 51 and the second damper 52 are signal-interlocked or mechanically-interlocked. When the mechanical interlocking manner is adopted, a mechanical structure, such as a link, etc., may be provided between the first damper 51 and the second damper 52. When the signal linkage method is adopted, a signal of a certain opening value is sent to the first damper 51, and a signal of subtracting the opening value from a constant value is sent to the second damper 52 in synchronization.

Taking the constant value as 100% for example, if 0%, 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, 100% is signaled to the first damper 51, 100%, 90%, 80%, 70%, 60%, 50%, 40%, 30%, 20%, 10%, 0% is signaled to the second damper 52 accordingly.

Referring to FIG. 2, in some embodiments, the portion of the tube segment between the ends of the first hot air duct 31 is higher than the portion of the tube segment between the ends of the second hot air duct 41. Thus, at least part of the first hot air duct 31 is located at the upper part of the second hot air duct 41, so that the entrance of heavy impurities such as condensed water and dust contained in hot air into the first hot air duct 31 can be reduced, the heater in the first hot air duct can be better protected, the service life of the heater can be prolonged, and the heating efficiency of the heater can be improved.

The connection between the first hot air duct 31 and the second hot air duct 41 can be set to be a steep slope to ensure that the first hot air duct 31 is disposed above the second hot air duct 41, and the impurities in the hot air can go forward and upward without overcoming the gravity, so that the impurities are not easy to enter the first hot air duct 31. In some embodiments, the diameter of the first hot air duct 31 can be designed to be larger than that of the second hot air duct 41, so that the first hot air duct 31 has a lower wind speed, the suspension wind conveying force is reduced, and the entry of impurities is further avoided.

The inventor discovers that in the research process, the material temperature is insufficient due to the fact that a large amount of heat energy is discharged from equipment due to the existence of the moisture discharging system in the related technology, so that larger hot air volume is needed (the air speed is naturally larger), meanwhile, the air supplementing system exists, in order to prevent the supplemented fresh air from escaping from the roller, the fresh air needs to be discharged through the moisture discharging system, and the moisture discharging air volume is further increased. The embodiment of the disclosure adopts steam to directly increase the temperature of hot air in production, has higher enthalpy and more efficient heat transfer efficiency, ensures that the applied heat energy is fully absorbed by materials, has small heat energy loss, and can adopt lower hot air flow, for example, the wind speed of the hot air is reduced from 0.30-0.40m/s to 0.10-0.12m/s. Accordingly, the circulation fan may be set to a lower frequency to reduce the hot wind speed; and hot air has higher enthalpy, so that the material heating rate is higher, the material is heated to a better material liquid absorption temperature after entering the roller, and the material liquid absorption rate is improved.

The lower hot air speed also makes the sundries with common mass more difficult to enter the first hot air pipe higher than the second hot air pipe. In addition, the flow of the hot air is reduced due to the low hot air speed, the material liquid particles carried in the hot air are greatly reduced, and the carried material liquid particles are finer particles, so that even if the material liquid particles reach the heater from the first hot air pipe, the fine particles are easy to volatilize on the surface of the heater and are difficult to adsorb on the heater, and the scaling probability of the heater is reduced to a greater extent.

Because the production process needs, the temperature in the roller in the material feeding process can not exceed 60 ℃, so the preheating temperature is generally below 65 ℃, so that some condensed water can be generated when steam is sprayed into the second hot air pipe, and in order to prevent the condensed water from causing the adverse effects of wet mass, water stain, material adhesion to the roller wall and the like on the material, the highest parts of the first hot air pipe 31 and the second hot air pipe 41 are preferably not higher than the lowest part of the air inlet pipe 22. Therefore, the condensed water can flow downwards under the action of gravity and is discharged before entering the air inlet pipe, and the condensed water cannot enter the charging machine along with hot air.

In fig. 2, the first pipe end of the return air pipe 21 is located at the upper part of the discharging cover 12, and the fourth pipe end of the air inlet pipe 22 is located at the lower part of the feeding cover 11, so that on one hand, the heat exchange of the thrown materials by the hot air entering the feeding cover 11 is facilitated to a greater extent, and on the other hand, the return air is not easily interfered with the discharging materials from the discharging cover 12.

To allow the return air to pass from a higher position to a lower position, the return air duct 21 may be provided with a bent section, the portion of which adjacent to the second end is located on the lower side of the feeder 10. This facilitates the arrangement of the first and second hot air ducts. Furthermore, the circulation fan 23 may be disposed at a portion of the bent pipe section adjacent to the second pipe end, and the highest portion of the first hot air duct 31 and the second hot air duct 41 is not higher than the lowest portion of the air inlet duct 22.

On the basis, the water receiving opening 24 of the drainage device can be arranged at the lower side of the circulating fan 23, and the water receiving opening 24 is positioned at the lowest part of the bent pipe section. Therefore, the condensed water formed in the return air pipe, the air inlet pipe and the first hot air pipe and the second hot air pipe can flow to the water receiving port of the drainage device under the action of gravity and then is discharged or collected outwards.

Referring to fig. 2, in some embodiments, the feeder hot air control system further comprises: a steam nozzle 42 and a steam flow adjusting device 43. A steam nozzle 42 is disposed at the steam inlet and is configured to communicate with a steam source. The steam flow rate adjusting device 43 is located upstream of the steam nozzle 42 in the steam flow direction, and is configured to adjust the steam flow rate ejected from the steam nozzle 42.

Based on each embodiment of aforementioned feeder hot air control system, this disclosed embodiment still provides a tobacco processing system, includes: the hot air control system of the feeder in any one of the preceding embodiments.

In an application example based on the embodiment of the hot air control system of the feeding machine, the problem that the preheating preparation time of the feeding machine is long, the preheating time is reduced to be within 5 minutes from more than 25 minutes is solved, the production efficiency is improved, and the moisture exhaust air volume is 1800m ³ The steam consumption of a feeder of a 2800kg/h cut tobacco production line is reduced from 167.5kg/h to 37.2kg/h, so that the energy utilization rate is greatly improved; secondly, the first hot air pipe is adopted for preheating, the mode that the second hot air pipe is used as a main part and the first hot air pipe is used as an auxiliary part is adopted in the production process, the problem of scaling of the heater is thoroughly solved, the hot air temperature regulation sensitivity is obviously improved, and the stability of the feeding quality is improved; thirdly, an air supplementing system is not needed, and the air pressure in the roller is more stable and largeThe situation that the hot air is discharged outside is solved; finally, the problem of condensed water of a hot air system is completely solved, no material wet mass and water stain are generated, and unqualified products in the feeding process are avoided.

Thus, various embodiments of the present disclosure have been described in detail. Some details that are well known in the art have not been described in order to avoid obscuring the concepts of the present disclosure. It will be fully apparent to those skilled in the art from the foregoing description how to practice the presently disclosed embodiments.

Although some specific embodiments of the present disclosure have been described in detail by way of example, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present disclosure. It will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope and spirit of the present disclosure. The scope of the present disclosure is defined by the appended claims.

Claims

1. The utility model provides a hot-blast control system of feeder which characterized in that includes:

a feeder (10) having a feed hood (11) and a discharge hood (12);

a return air duct (21) having a first duct end and a second duct end, the first duct end communicating with the discharge hood (12);

an air inlet pipe (22) having a third pipe end and a fourth pipe end, the fourth pipe end communicating with the feed hood (11);

a first hot air pipe (31), two ends of which are respectively communicated with the second pipe end and the third pipe end;

a second hot air duct (41) having both ends respectively communicating with the second duct end and the third duct end and having a steam inlet for receiving the injected steam;

a heater (32) disposed on the first hot blast duct (31) configured to heat an air flow passing through the first hot blast duct (31);

a circulation fan (23) disposed on the return air duct (21) and configured to drive an air flow in the return air duct (21) to flow to the air inlet duct (22) via at least one of the first hot air duct (31) and the second hot air duct (41); and

and the control valve group is connected with the first hot air pipe (31) and the second hot air pipe (41) and is configured to independently control the on-off or the opening degree of an air door of the first hot air pipe (31) and the second hot air pipe (41) or perform linkage control.

2. The hot air control system of the feeding machine as claimed in claim 1, wherein the control valve set comprises:

the first air damper (51) is arranged on the first hot air pipe (31) and is configured to adjust the on-off or air damper opening degree of the first hot air pipe (31); and

and the second air damper (52) is arranged on the second hot air pipe (41) and is configured to adjust the on-off or the opening degree of the air damper of the second hot air pipe (41).

3. The feeder hot air control system according to claim 2, wherein a sum of the opening degrees of the first damper (51) and the second damper (52) is configured to be maintained at a constant value.

4. The hot air control system of the feeding machine as claimed in claim 3, wherein the first damper (51) and the second damper (52) are linked by signal or mechanically.

5. The hot air control system of the feeding machine as claimed in claim 3, wherein the constant value is 100%.

6. The hot air control system of the feeding machine as claimed in claim 1, wherein the first pipe end is located at an upper portion of the discharging cover (12), and the fourth pipe end is located at a lower portion of the feeding cover (11).

7. The feeder hot air control system according to claim 6, wherein the return air duct (21) has a bent pipe section, and a portion of the bent pipe section adjacent to the second pipe end is located on a lower side of the feeder (10).

8. The hot air control system of feeder according to claim 1, wherein the highest portion of each of the first hot air duct (31) and the second hot air duct (41) is not higher than the lowest portion of the air inlet duct (22).

9. The hot air control system of feeding machine as claimed in claim 1, wherein the portion of the tube section between the two ends of the first hot air duct (31) is higher than the portion of the tube section between the two ends of the second hot air duct (41).

10. The hot air control system of the feeding machine as claimed in claim 1, further comprising:

a steam nozzle (42) disposed at the steam inlet configured to communicate with a steam source; and

a steam flow rate adjusting device (43) located upstream of the steam nozzle (42) in a steam flow direction, configured to adjust a steam flow rate ejected from the steam nozzle (42).

11. The hot air control system for the feeder of claim 1, wherein the return air duct (21) has a bent section, a portion of the bent section adjacent to the second tube end is located at a lower side of the feeder (10), the circulating fan (23) is disposed on a portion of the bent section adjacent to the second tube end, and a highest portion of the first hot air duct (31) and a highest portion of the second hot air duct (41) are not higher than a lowest portion of the air inlet duct (22).

12. The hot air control system of the feeding machine as claimed in claim 11, further comprising:

and the drainage device is provided with a water receiving port (24) arranged on the lower side of the circulating fan (23), wherein the water receiving port (24) is positioned at the lowest part of the bent pipe section.

13. The hot air control system of the charger according to claim 1, wherein the charger (10) comprises:

a frame (13);

the roller (14) is rotatably arranged on the rack (13), and the two ends of the roller are respectively provided with the feeding cover (11) and the discharging cover (12); and

a feed liquid nozzle (15) disposed on the drum (14) or adjacent to the feed hood (11) configured to spray feed liquid onto material entering the feed hood (11).

14. The feeder hot air control system according to claim 13, wherein the material scattering position of the roller (14), the first pipe end and the fourth pipe end are all located on a same side of a Reference Plane (RP), an axis of the roller (14) is located within the Reference Plane (RP), and the Reference Plane (RP) is perpendicular to a horizontal plane.

15. The hot air control system of the feeding machine according to any one of claims 1 to 14, further comprising:

the return air temperature acquisition device (61) is arranged on the return air pipe (21) and is configured to acquire the temperature of the air flow in the return air pipe (21);

the air inlet temperature acquisition device (62) is arranged on the air inlet pipe (22) and is configured to acquire the temperature of the air flow in the air inlet pipe (22).

16. The hot air control system of the feeding machine according to any one of claims 1 to 14, further comprising:

-a feeding device (71) located upstream of the feeder (10) in the direction of transport of the material, configured to feed the feeder (10) with unfed material;

a discharge device (72) located downstream of the feeder (10) in the direction of transport of the material, configured to receive the fed material output by the feeder (10);

a moisture meter (73) arranged on the discharging device (72) and configured to detect the moisture content of the fed material on the discharging device (72);

a temperature meter (74) disposed on the outfeed device (72) configured to detect a temperature of the material being fed on the outfeed device (72).

17. A tobacco processing system, comprising:

the feeder hot air control system of any one of claims 1 to 16.