CN105674720A - Drying box provided with double circulation air ducts, and drying method - Google Patents

Abstract

The invention discloses a drying box provided with double circulation air ducts, and a drying method. The drying box comprises a box body, and the circulation air ducts arranged in the box body and used for drying agricultural products, wherein each circulation air duct comprises an air supply section, a drying section, an air return section and a fan. According to the drying box and the drying method, which are disclosed by the invention, the agricultural products are dehydrated through two paths of dry and hot circulation air with opposite flow directions; and the drying box is simple in structure, low in cost, uniform in drying, low in energy consumption and good in effect. In addition, the circulation air ducts at the left side and the right side are capable of adjusting included angles according to the size limit of a site, less in occupied space, and convenient to install. Through matching with the drying method based on the drying box, the technical problems of non-uniform drying, poor effect, high energy consumption and large size of the existing drying box can be greatly solved.

Description

A drying oven and drying method provided with double circulation air ducts

technical field

The invention relates to the field of drying equipment, in particular to a drying box provided with double circulation air ducts and a drying method used in the drying process of agricultural products, meat products or aquatic products.

Background technique

The drying process is an important part of the agricultural product processing process. The purpose of drying is to reduce the moisture of agricultural products to a safe moisture value, inhibit cell growth, reduce active metabolism, and facilitate processing, transportation, storage and consumption. The existing drying ovens in China mainly include tunnel dryers, box dryers, drum dryers, drum dryers, etc. Box dryers are divided into horizontal airflow box dryers and cross-flow airflow boxes according to the dryer structure. Type dryer and mixed flow box dryer and so on.

However, no matter the existing airflow drying oven is open, semi-open or closed, it is dried in the form of unidirectional wind flow, and its shortcomings mainly include:

One is that the length of the drying section is long, the drying wind flows in the drying section for a long time, and the temperature drops greatly, resulting in uneven heating of the agricultural products in the drying section and poor drying effect.

Second, under the condition of the same size of the drying box, the fan with single-circulation airflow needs a higher air supply pressure, and the fan with higher power is selected, which further increases the energy consumption and cost of the drying box.

The third is that under the same conditions as other conditions, the drying oven with single-circulation airflow has a slower wind speed and lower drying efficiency.

Therefore, the existing drying box needs to be further improved and perfected.

Contents of the invention

The object of the present invention is to provide a drying oven and a drying method provided with double circulation air ducts, aiming to solve the technical problems of uneven drying, poor effect, high energy consumption and large volume of the existing drying oven.

The technical scheme designed by the present invention is as follows:

A drying box with double circulating air channels, wherein the drying box includes a box body and a circulating air channel arranged in the box and used for drying; the circulating air channels are set as two left and right, respectively A circulating air duct and a second circulating air duct; the flow direction of the first circulating air duct is opposite to that of the second circulating air duct;

The circulating air duct includes an air supply section, a drying section, an air return section, and a fan; the inlet of the air supply section communicates with the air outlet of the fan, and the outlet communicates with the inlet of the drying section; the inlet of the return air section communicates with the air outlet of the fan. The outlet of the drying section is connected, and the outlet is connected with the air inlet of the fan; the air supply section, the drying section and the return air section constitute a channel for the circulation of drying air, and the drying air is driven by the fan to flow in the channel.

In the drying box with double circulation air ducts, two circulation air ducts with opposite flow directions are set as one group, and several groups of circulation air ducts are arranged in the drying box.

The drying box provided with double circulating air channels, wherein, the air supply section, the drying section and the return air section are arranged in the same vertical plane, and the air supply section is located above the drying section, and the drying air is in the vertical in-plane circulation.

The drying box provided with double circulating air ducts, wherein, the air supply section, the drying section and the return air section are arranged in the same horizontal plane, and the drying air circulates in the horizontal plane.

The drying box provided with double circulation air channels, wherein, the drying section is set as a drying channel, and its ventilation area is greater than or equal to 4 square meters or greater than 1/2 of the cross-sectional area of the drying box; the length of the drying channel is greater than or equal to 800 mm, divided into several small ducts.

In the drying oven provided with double circulating air ducts, the angle between the left and right circulating air ducts ranges from 90° to 180°.

The drying box provided with double circulation air ducts, wherein, the box body is provided with material openings for discharging and retrieving materials, and the material openings are located on the sides around the box body.

In the drying box provided with double circulation air ducts, a diverter device for hot air diversion is also provided in the cabinet, and the diverter device is set as a diverter plate, and the diverter plate is located at the entrance of the air supply channel.

The drying box provided with double circulation ducts, wherein, the box body is provided with a dehumidification device for processing high-humidity air, and a heating device for increasing the temperature of the drying medium; the dehumidification device and the heating device are arranged at Front or rear of the fan.

A drying method for a double-channel drying box, which includes the following steps: firstly put agricultural products into the drying box; then start the fan, the air in the drying box is heated, and the fan drives the hot air to pass through the air supply section, the drying section and the return section; The wind section, and continuously circulate and dry; then use a dehumidification device or a dehumidification device to discharge high-humidity air or dehumidify it through a dehumidification device; finally take out the dried agricultural products.

To sum up, the drying oven provided by the present invention with double circulating air ducts dehydrates agricultural products through two dry and hot circulating air flowing in opposite directions. It has simple structure, low cost, uniform drying, low energy consumption, and excellent it is good. In addition, the circulating air ducts on the left and right sides can adjust the angle according to the size limit of the site, which occupies a small space and is convenient for installation. Cooperating with the drying method based on the drying box, the technical problems of uneven drying, poor effect, high energy consumption and large volume of the existing drying box can be well solved.

Description of drawings

Fig. 1 is the front view of the drying oven provided by the present invention.

Fig. 2 is a left view of the drying oven provided by the present invention.

Fig. 3 is a top view of the drying oven provided by the present invention.

detailed description

In order to make the object, technical solution and advantages of the present invention more clear and definite, the present invention will be further described below with reference to the accompanying drawings and examples.

As shown in Fig. 1 to Fig. 3, the present invention discloses a drying box equipped with a double circulation air duct, the drying box is mainly used for the drying process of agricultural products, meat products or aquatic products, and removes free water and some Combined with water, it is beneficial to the subsequent deep processing of agricultural products. Wherein, the drying box includes a box body 100 and a circulating air duct arranged in the box body 100 and used for drying agricultural products. There are two left and right circulation air passages, which are respectively the first circulation air passage and the second circulation air passage. The flow direction of the first circulating air channel is opposite to that of the drying air in the second circulating air channel. In this embodiment, as shown in FIG. 1 , the first circulating air duct on the left adopts a counterclockwise air supply mode, and the second circulating air duct on the right adopts a clockwise air supply mode.

Specifically, as shown in FIG. 1 , the circulating air duct includes an air supply section 210 , a drying section 220 , a return air section 230 , and a fan 240 . The inlet of the air supply section 210 communicates with the air outlet of the fan 240 , and the outlet communicates with the inlet of the drying section 220 . The inlet of the return air section 230 communicates with the outlet of the drying section 220 , and the outlet communicates with the air inlet of the fan 240 . The air supply section 210 , the drying section 220 and the return air section 230 constitute a channel for circulating the drying air, and the flow power of the drying air in the channel is provided by the fan 240 .

Preferably, as a preferred embodiment of the present invention, the box body 100 is provided with a dehumidification device for processing high-humidity air or a dehumidification device for removing water from the air, and a dehumidification device for increasing the temperature of the drying medium (such as air). heating equipment. The heating device or dehumidification device can be arranged at the front or rear end of the blower, but not in the drying section 220, and the drying medium (such as air) is heated by the heating device for drying agricultural products. The dehumidification device is not arranged in the air supply section 210 . The box body 100 may not be provided with a dehumidifying device, a dehumidifying device or a heating device. The wet air passing through the material can be drawn out of the air supply section 210 and processed by an external device; the dry air can be sent into the drying box at the air supply section 210 after the air is processed by an external device not in the box, and The hot air with water vapor is discharged to the outside, so that the inside of the box can always maintain a dry environment with high temperature and low humidity.

Preferably, the heating device can be an electric auxiliary heating device installed in the air supply section or a radiator installed at the level of the return air section and the fan, and the working fluid of the radiator can be hot water or Freon.

Preferably, in order to improve the drying efficiency of the drying box, two circulating air channels with opposite flow directions are set as one group, and several groups of circulating air channels can be arranged in the drying box, and these circulating air channels can be arranged along the length direction of the drying box. It can also be arranged in the width direction. In this way, the volume of the drying box can be increased, more agricultural products can be placed, and the yield of dried agricultural products can be increased.

Further, as shown in Figure 1 and Figure 2, there are two implementations of the circulating air duct provided in this embodiment, the first one is that the air supply section 210, the drying section 220 and the return air section 230 are arranged In the vertical plane, and the air supply section 210 is located above the drying section 220 (that is, the fan 240 is located above the agricultural products), the drying wind enters the drying section 220 from top to bottom in the vertical plane, and returns from bottom to top after drying. Fan 240, and continuous circulation.

Another embodiment of the circulating air duct is that the air supply section 210 , the drying section 220 and the return air section 230 are arranged in the same horizontal plane, and the drying air circulates in the horizontal plane. This horizontal circulating air duct can effectively reduce the overall height of the drying box, which is suitable for situations where the height of the site is not enough.

Preferably, in order to increase the ventilation area and improve the drying effect, the drying section 220 in this embodiment is set as a drying channel, and its ventilation area is greater than or equal to 4 square meters or greater than 1/2 of the cross-sectional area of the drying box.

Preferably, in order to shorten the length of the drying channel and at the same time ensure that the agricultural products are evenly heated and improve the drying effect, the length of the drying channel is greater than or equal to 800 mm. In this embodiment, one drying channel may be provided, or may also be provided as a drying channel composed of several small air ducts.

Further, due to the limitation of the size of the space where the drying oven is placed, the angle between the left and right circulation air ducts can be adjusted according to actual needs, and the specific adjustment range is 90° to 180°. As shown in FIG. 3 , the angle between the left and right circulating air ducts in the figure is 180°.

Preferably, in order to further improve the utilization rate of the hot air, the hot air is evenly blown to every corner of the drying tunnel. The box body 100 is also provided with a distribution device for distributing the hot air, and the distribution device has various forms, such as an electric air homogenizer and the like. In this embodiment, the distribution device is preferably configured as a distribution plate, and the distribution plate is located in the air supply channel and parallel to the bottom of the box body 100 . After the hot air is blown out from the fan 240, it passes through the air supply section 210, and is evenly divided at the entrance of the drying channel to dry the agricultural products in the drying channel to obtain a better drying effect.

Further, in order to facilitate the workers to put the agricultural products into the drying box, as shown in Figure 1 and Figure 3, the box body 100 is provided with a material opening for feeding and retrieving, and the material opening is located on the side of the box body 100 . The material opening is also provided with a sealing door 110 for isolating outside air exchange. After discharging, closing the sealing door 110 can prevent the hot air in the box from escaping outwards and reduce the heat loss in the box.

The present invention also discloses a drying method based on a double-channel drying box, which includes the following steps: first, put the agricultural products into the drying box; Section 210, drying section 220 and return air section 230, and continuously circulate and dry; then use a dehumidification device (or dehumidification device) to discharge high-humidity air (or dehumidify through a dehumidification device); finally take out the dried agricultural products.

When the present invention is working, the fans 240 on the left and right sides drive the dry hot air to circulate in the box by means of blowing air. Since the flow directions of the circulating air ducts on the left and right sides are opposite, and there is no physical barrier in the middle, so The hot air from the left air passage and the hot air from the right air passage are evenly mixed at the return air section 230 to reduce the temperature difference between the left and right circulating air and improve the drying effect.

To sum up, the drying oven provided by the present invention with double circulating air ducts dehydrates agricultural products through two dry and hot circulating air flowing in opposite directions. It has simple structure, low cost, uniform drying, low energy consumption, and excellent it is good. In addition, the circulating air ducts on the left and right sides can adjust the angle according to the size limit of the site, which occupies a small space and is convenient for installation. Cooperating with the drying method based on the drying box, the technical problems of uneven drying, poor effect, high energy consumption and large volume of the existing drying box can be well solved.

It should be understood that the application of the present invention is not limited to the above examples, and those of ordinary skill in the art can make improvements or changes based on the above descriptions, for example, common/customary replacements for each component in the present invention, etc., all These improvements and transformations should all belong to the protection scope of the appended claims of the present invention.

Claims (9)

1. the drying baker being provided with Two-way Cycle air channel, it is characterised in that in described drying baker includes casing and is arranged on casing and for dry circulation air path; Described circulation air path is set to two, left and right, respectively the first circulation air path and the second circulation air path; Flowing to of described first circulation air path is contrary with the flow direction of the second circulation air path;

Described circulation air path includes air supply section, dryer section, air return section and blower fan; The entrance of described air supply section connects with the air outlet of blower fan, and outlet connects with the entrance of dryer section; The entrance of described air return section and the outlet of dryer section, outlet connects with the air inlet of blower fan; Described air supply section, dryer section and air return section constitute the passage that dry wind circulates, blower fan drive dry wind to flow in passage.

2. it is provided with the drying baker in Two-way Cycle air channel according to claim 1, it is characterised in that the circulation air path that two flow directions are contrary is set to one group, arranges some groups of circulation air paths in drying baker.

3. being provided with the drying baker in Two-way Cycle air channel according to claim 2, it is characterised in that described air supply section, dryer section and air return section are arranged in same perpendicular, and air supply section is positioned at the top of dryer section, dry wind is at perpendicular internal circulation flow.

4. it is provided with the drying baker in Two-way Cycle air channel according to claim 2, it is characterised in that described air supply section, dryer section and air return section are arranged in same horizontal plane, and dry wind is at horizontal plane internal circulation flow.

5. being provided with the drying baker in Two-way Cycle air channel according to claim 1, it is characterised in that described dryer section is set to dry channel, its draught area is be more than or equal to 4 square metres or more than the 1/2 of drying baker sectional area; The length of described dry channel, be more than or equal to 800 millimeters, is divided into some little airducts.

6. it is provided with the drying baker in Two-way Cycle air channel according to claim 1, it is characterised in that the angular range between the described circulation air path in two, left and right is 90 ° to 180 °.

7. it is provided with the drying baker in Two-way Cycle air channel according to claim 1, it is characterised in that described casing is provided with the material mouth for blowing and feeding, and described material mouth is positioned at the side of casing surrounding.

8. it is provided with the drying baker in Two-way Cycle air channel according to claim 1, it is characterised in that described casing is provided with the dehydrating unit for processing highly humid air and for improving the heater of dry medium temperature; Described dehydrating unit and heater are arranged on front end or the rear end of blower fan.

9. the drying means for double; two air channels drying baker, it is characterised in that comprise the steps: first agricultural product to be put into drying baker; Then starting blower fan, drying baker air is heated, and blower fan drives hot blast by air supply section, dryer section and air return section, and continuous cyclic drying; It is then used by humidity-discharging device or dehydrating unit, highly humid air is discharged or is dehumidified by dehydrating unit; Finally dried agricultural product are taken out.