CN204137801U - The direct redrying device of Double-level Reticulated belt - Google Patents

Abstract

The utility model relates to sheet cigarette redrying device, the specifically direct redrying device of a kind of Double-level Reticulated belt, comprising by main body rack, being arranged on the foraminous conveyer on main body rack and the material conveying mechanism for driving the power system of foraminous conveyer to form, it is characterized in that: foraminous conveyer is that upper and lower two superimposed formula is turned back structure, whole redrying device becomes to be drying one district of double-layer structure and dry 2nd district by baffle for separating, each dry section utilizes again dividing plate to be divided into three dry houses, is provided with temperature booster and circulating fan in each dry house.Maximum feature of the present utility model is: adopt the upper and lower Overlap design of two-layer guipure, make material by twice different arid region and low temperature and high relative humidity and high temperature low humidity so that realize sheet cigarette direct redrying to Target moisture, energy utilization rate can be improved, effectively reduce guipure redrying device length.

Description

Double layer mesh belt type direct rebaking equipment

technical field

The utility model relates to tobacco rebaking equipment, in particular to a double-layer mesh belt type direct rebaking equipment. The equipment adopts the design of overlapping two layers of mesh belts up and down, so that the material can be directly rebaked tobacco through two different drying areas. Roasting to the target moisture can improve energy utilization and effectively reduce the length of mesh belt rebaking equipment.

Background technique

Tobacco redrying is a very important process in the primary tobacco processing process. The quality of tobacco redrying has a great influence on the physical and sensory properties of leaves. At the same time, redrying equipment also consumes a lot of energy in the threshing and redrying process device of. At present, most leaf threshing and redrying enterprises use single-layer mesh belt redrying equipment. The leaf layer with a certain thickness is then processed through the drying section, cooling section and dampening section of the leaf rebaking machine in sequence. In the drying section, the leaves with an initial moisture content of 20% pass through four drying areas with different temperature and humidity treatment media, and the moisture content of the leaves in the drying section decreases to 8%; after the leaves cool down in the cooling section, they enter the moisture recovery section to make the tobacco moisture regain to 12.5 %, then enter the packing process.

The following problems still exist for the existing single-layer mesh belt type rebaking equipment. First of all, the single-layer mesh-belt rebaking equipment cannot directly dry the tobacco from the initial moisture to the target moisture, so that the tobacco has passed through the cooling section and the drying section after being overdried. Secondly, the single-layer mesh belt rebaking equipment is equipped with a drying section, a cooling section, and a dampening section to make the length of the equipment longer. Finally, single-layer mesh belt rebaking equipment consumes a lot of energy and has a low energy utilization rate.

Patent CN101254022B and patent CN201182191 propose an airflow type tobacco redrying method and device, using three-stage airflow drying chambers connected in series, and the temperature, humidity and flow rate of the hot air medium in different drying chambers are different. It can realize direct rebaking of the tobacco slices to 12.5% moisture, avoiding excessive drying of the leaves. However, this method also has the problems of long process flow and complicated equipment. At the same time, the airflow drying method is difficult to meet the needs of large-flow material processing, and the airflow drying method also consumes high energy consumption.

Patent CN 102599625B proposes a drum-type direct redrying equipment and method, through the heating of the wall of the drum and hot air heating, the direct redrying of sheet tobacco to a moisture content of 12%-13% can be realized. The method and equipment may increase the breakage in the redrying process of the tobacco flakes.

Contents of the invention

The purpose of this utility model is just to overcome the above-mentioned deficiencies in the prior art, and provides a kind of double-layer mesh belt type direct rebaking equipment. The equipment is divided into two drying areas, that is, the first drying area adopts low-temperature and high-humidity drying, and the second drying area adopts high-temperature and low-humidity drying; and adopts the design of overlapping upper and lower layers of mesh belts, and the materials pass through the upper mesh belt sequentially through the first drying area through low-temperature and high-temperature drying. After the wet hot air is preheated, it enters the second drying zone, and the material is quickly dehydrated by the hot air with high temperature and low humidity. Then the material falls on the second layer of mesh belt through the unloading device, and continues to be dried through the second drying zone. Rapid dehydration, and finally the material passes through the drying area, and the hot air with low temperature and high humidity acts on the material to dehydrate the material slowly and evenly to the target moisture.

The purpose of this utility model is achieved by the following technical measures:

A double-layer mesh belt type direct rebaking equipment, including a material conveying mechanism composed of a main body support, a conveying mesh belt installed on the main body support, and a power system for driving the conveying mesh belt, wherein: the conveying mesh belt is the upper, The lower two layers of overlapping fold-back structure are equipped with receiving troughs at the fold-back points of the upper and lower layers. The whole re-baking equipment is divided into two-layer drying area 1 and drying area 2 by partitions. Each drying area uses The partition is divided into three drying chambers, each of which is equipped with a heater and a circulation fan to provide power for air flow; the circulation fans in each drying chamber of the first drying area are installed above the side of the drying chamber, using The air-inlet drying method is from the top, and an air guide orifice is arranged above the upper conveying mesh belt in the drying area 1; the circulation fans in each drying room in the drying area 2 are installed under the side of the drying room, and the air-inlet drying method is from the bottom , and a wind guide orifice plate is arranged under the lower conveying mesh belt in the second drying area, and a pressure mesh belt is arranged above the upper conveying mesh belt in the second drying area.

Smoke guards are installed on both sides of the conveyor belt on the upper and lower layers to prevent smoke leakage.

Two circulating fans are set in each drying room to provide power for air flow, and the two circulating fans are arranged on one side of the conveying mesh belt.

The air guide orifice and the conveying mesh belt form a certain inclination angle, and the inclination angle can be adjusted within the range of 10-30° inclination angle according to the wind speed and air volume. In order to make the air volume passing through the mesh belt uniform.

Cleaning rollers are installed at the end of the upper mesh belt and the lower mesh belt to play the role of cleaning the mesh belt and unloading.

Design principle and working process of the present utility model are as follows:

The re-baking equipment is divided into two zones, namely the first drying zone and the second drying zone. Drying zone 1 adopts low temperature and high humidity process conditions, while drying zone 2 adopts high temperature and low humidity process conditions. Each drying area is divided into three drying chambers, and the drying chambers are separated by partitions to prevent the exchange of airflow in different drying chambers.

Circulation fans are installed in different positions to provide different airflow directions for different drying areas. The circulating air volume can be adjusted by controlling the speed of the fan or adjusting the angle of the fan blades. The circulating fan in the drying area is installed above one side of the drying room. The fan makes the air in the drying room form a closed loop. The air moves downward through the upper mesh belt and the lower mesh belt. A heater is installed under the circulating fan. After the circulating air passes through the heater It is continuously heated; the circulating fan in the second drying area is installed under one side of the drying room. The fan makes the air in the drying room form a closed loop. The air moves upward through the lower mesh belt and the upper mesh belt. A heater is installed above the circulating fan, and the circulating air passes through The heater heats up constantly. Each drying room is powered by two circulating fans.

In different drying sections, the heater can control the temperature of the hot air through the number of heaters and adjusting the power. In the circulating air system, the humidity in the drying room can be controlled by controlling the opening of the exhaust port of each drying room. Use fewer heaters in the drying area to make the temperature of the hot air lower, set the hot air process parameters at 45°-55°, and keep the drying area at 70%-90% relative humidity by adjusting the opening of the exhaust port environment. In the second drying area, more heaters are used to make the hot air temperature higher, and the hot air parameter is set at 65°-75°. By adjusting the opening of the exhaust port, the second drying area is kept at a relative humidity of 30%-50%.

Some holes are evenly distributed on the air guide hole plate, installed above the upper mesh belt in the first drying area, and installed under the lower mesh belt in the second drying area. The fixing device is fixed on the bracket and maintains a certain angle with the mesh belt, and the inclination angle can be adjusted by adjusting the fixing devices at both ends according to the wind speed and air volume, so that the air volume passing through the mesh belt is uniform.

In the material conveying system, the pressure mesh belt, the upper layer mesh belt, the lower layer mesh belt, and the two ends are respectively fixed on the bracket, and one end is driven by a drive wheel connected by a sprocket driven by a reducer, which can be adjusted by adjusting the reducer to adjust the speed of the mesh belt movement. One end is a driven wheel, which is fixed on the bracket through a tensioning cylinder, and the mesh belt can maintain a certain tension by adjusting the cylinder. The conveyor mesh belt is made of stainless steel, and the plate is punched with φ3 holes.

The upper mesh belt is installed above the lower mesh belt, and both pass through the first drying area and the second drying area. The movement direction of the upper mesh belt is opposite to that of the lower mesh belt, and the material is evenly spread on the upper mesh belt through the feeding port, and then passes through the first drying zone and the second drying zone. After the material moves to the end of the upper mesh belt, it is evenly spread on the lower mesh belt through the receiving trough, and then passes through the second drying area and the first drying area in sequence. A pressure mesh belt is installed on the upper part of the upper mesh belt in the second drying area to prevent the dried fragments from being blown up due to excessive wind speed, blocking the diffuse holes on the heater, and at the same time passing the tiny fragments blown up by the wind. The reverse force returns to the conveyor belt to reduce the loss of material.

The feed inlet is set at the front end of the upper mesh belt, and the feeder is used to uniformly convey the sheet tobacco for the upper mesh belt, and the end of the lower mesh belt is the discharge port, and the end of the upper mesh belt and the end of the lower mesh belt are equipped with cleaning rollers. To the role of cleaning mesh belt and unloading. The end of the upper mesh belt, that is, the turning point of the upper and lower layers, is equipped with a receiving trough.

The utility model has the following advantages:

1. The present invention realizes the direct redrying of the tobacco slices by setting two layers of mesh belts, and avoids the influence of excessive drying on the quality of the tobacco leaves during the redrying process of the thin tobacco leaves.

2. In the present invention, the two-layer mesh belt moves in reverse, so that the material passes through the first drying area and the second drying area twice, and through different drying areas, the direct rebaking of the tobacco sheet to the target moisture is realized, which improves the energy utilization rate and effectively Reduced device length.

3. In the process of conveying the laminar tobacco from the upper layer mesh belt to the lower layer mesh belt through the blanking and receiving device in the present invention, it plays a certain role in mixing materials and improves the drying uniformity of the mesh belt type re-baking equipment.

Description of drawings

Figure 1 is a top view of the device;

Figure 2 is the E-direction view of Figure 1 (the upper and lower conveyor belts are not shown);

Figure 3 is a D-D cross-sectional view of Figure 1 (that is, the equipment cross-sectional view D-D);

Fig. 4 is a sectional view of a drying area;

Fig. 5 is a sectional view of the second drying area;

Marked in the figure: 1-circulation fan, 2-baffle, 3-main support, 4-heater, 5-inlet, 6-roller tensioning device, 7-outlet, 8-support, 9- Pressure mesh belt, 10-upper conveying mesh belt, 11-feeding trough, 12-lower conveying mesh belt, 13-air guiding orifice plate, 14-cleaning roller, 15-smoke guard plate, 16-driving wheel, 17-passive wheel.

Detailed ways

The utility model is described below in conjunction with accompanying drawing to its structure and connection relationship:

As shown in Figure 1-5: a double-layer mesh belt type direct redrying equipment, including materials composed of a main body support (3), a conveying mesh belt installed on the main body support and a power system for driving the conveying mesh belt Conveying mechanism, wherein: the conveying mesh belt is an upper and lower double-layer overlapping return structure, and a receiving trough (11) is arranged at the return position of the upper and lower layers, and the entire rebaking equipment is divided into two parts by a partition (2). Drying zone 1 and drying zone 2 of layer structure, each drying zone is divided into three drying chambers by partition board (2), each drying chamber is equipped with heater (4) and circulation fan (1) to provide Airflow flow power; wherein the circulation fan in each drying chamber of the first drying area is installed above the side of the drying room, adopts the upward air drying method, and is equipped with a wind guide above the upper conveying mesh belt (10) of the first drying area Orifice plate (13); the circulating fan in each drying chamber of the drying second district is installed in the side below in the drying chamber, adopts the air-inlet drying mode from the bottom, and is arranged below the lower floor conveying mesh belt (12) of the drying second district. The top of the wind guide orifice (13), the upper layer conveying mesh belt (10) of the drying second zone is arranged with a pressing mesh belt (9).

Smoke shields (15) are installed on both sides of the conveying mesh belt on the upper and lower layers to prevent smoke leakage.

Two circulating fans are set in each drying room to provide power for air flow, and the two circulating fans are arranged on one side of the conveying mesh belt.

The air guide orifice (13) is at a certain angle of inclination with the conveying mesh belt, and the angle of inclination can be adjusted in the range of 10-30° according to wind speed and air volume adjustment, so that the air volume passing through the mesh belt is even.

Sweeping rollers (14) are installed at the end of the upper-level conveying mesh belt (10) and the end of the lower floor conveying mesh belt (12), which play a role in cleaning the mesh belt and unloading.

Working principle and working process of the present utility model are described in detail below in conjunction with the accompanying drawings:

As shown in Figure 1, the double-layer mesh belt equipment is divided into two areas, namely the first drying area and the second drying area. Each drying area is divided into three drying chambers. Circulation fans (1) are arranged on one side of the mesh belt.

As shown in Figure 2, the drying chambers are separated by partitions (2) to prevent the exchange of air in different drying chambers. Each drying chamber is powered by two circulating fans (1). The heater (4) is installed in the middle of the equipment to heat the circulating air. In different drying rooms, the heating temperature is controlled by controlling the number or power of the heater (4), so that the hot air in different drying rooms can be kept at different temperatures. Can meet a variety of processing conditions.

As shown in Figure 3, the leaf tobacco after threshing is sent to the feed port (5) at a steady flow rate through the feeding device, and the sheet tobacco is fed into the upper layer of the double-layer mesh belt redrying equipment through the feed port (5). With the mesh belt 10, the laminar tobacco passes through the first drying area and the second drying area successively under the action of the upper conveying mesh belt (10). The sheet tobacco is conveyed to the end of the mesh belt through the upper conveying mesh belt (10), and then the material is conveyed to the lower conveying mesh belt (12) through the cleaning roller (14) through the receiving chute (11). In the lower conveying mesh belt (12), the laminar tobacco first passes through the second drying zone, and finally the laminar tobacco passes through the low-temperature and high-humidity drying zone one, and the laminar tobacco dried to the target moisture is conveyed through the cleaning roller (14) and through the discharge port (7) to the next process.

In the material conveying system, the pressure mesh belt (9), the upper conveying mesh belt (10), the lower conveying mesh belt (12), and the two ends are respectively fixed on the bracket, and the driving wheel (16) is connected by the reducer at one end. Driven by the sprocket, the speed of the mesh belt can be adjusted by adjusting the speed of the reducer. One end is a driven wheel (17), which is fixed on the support by a roller tensioning device (6), and the mesh belt can be adjusted to maintain a certain tension.

As shown in Figure 4, it is a cross-sectional view of the first drying area. The circulating fan (1) in the first drying zone is installed on the upper part of the equipment, and provides uniform downward hot air for the mesh belt through the air guide hole plate (13) on the upper part of the upper conveying mesh belt (10). Smoke shield (15) is installed on the both sides of mesh belt to prevent leakage of smoke.

As shown in Figure 5, it is a cross-sectional view of the second drying zone. The circulating fan (1) in the second drying zone is installed at the lower part of the equipment, and provides uniform upward hot air for the mesh belt through the air guide hole plate (13) at the lower part of the lower conveying mesh belt (12). the

Claims (5)

1. the direct redrying device of Double-level Reticulated belt, comprise by main body rack, be arranged on the foraminous conveyer on main body rack and the material conveying mechanism for driving the power system of foraminous conveyer to form, it is characterized in that: foraminous conveyer is upper, lower two superimposed formula is turned back structure, upper, the place of turning back of lower floor is provided with splicing groove, whole redrying device becomes to be drying one district of double-layer structure and dry 2nd district by baffle for separating, each dry section utilizes again dividing plate to be divided into three dry houses, temperature booster and circulating fan is provided with to provide air current flow power in each dry house, circulating fan in each dry house in a wherein dry district is installed above side in the drying chamber, adopts upper air inlet drying mode, and be laid with wind-guiding orifice plate above the upper strata foraminous conveyer in a dry district, side-lower in the drying chamber installed by circulating fan in each dry house in dry 2nd district, adopt lower air intake drying mode, and be laid with pressure network band above the upper strata foraminous conveyer being laid with wind-guiding orifice plate, dry 2nd district in the below of lower floor's foraminous conveyer in dry 2nd district.

2. the direct redrying device of Double-level Reticulated belt according to claim 1, is characterized in that: be all provided with in upper and lower two-layer foraminous conveyer both sides and protect cigarette plate.

3. the direct redrying device of Double-level Reticulated belt according to claim 1, is characterized in that: all arrange two circulating fans in each dry house and provide air current flow power, two circulating fans are arranged in the side of foraminous conveyer.

4. the direct redrying device of Double-level Reticulated belt according to claim 1, is characterized in that: wind-guiding orifice plate and foraminous conveyer are certain angle of inclination, and can adjust in 10-30 ° of range of tilt angles.

5. the direct redrying device of Double-level Reticulated belt according to claim 1, is characterized in that: be all provided with cleaning roller at upper wire end of tape and lower net end of tape.