CN214172744U

CN214172744U - High-stability combined heat exchange type grain dryer

Info

Publication number: CN214172744U
Application number: CN202120201875.3U
Authority: CN
Inventors: 周瑾; 马培勇; 谢尚臻; 祁风雷; 张颖
Original assignee: Anhui Fuel Smart Technology Co ltd
Current assignee: Anhui Fuel Smart Technology Co ltd
Priority date: 2021-01-25
Filing date: 2021-01-25
Publication date: 2021-09-10
Anticipated expiration: 2031-01-25

Abstract

The utility model discloses a high-stability combined heat exchange type grain dryer, which comprises a heat source and a drying tower, wherein the drying tower is provided with a tempering bin, a drying chamber and a collecting chamber from top to bottom, the heat source is connected with the drying chamber, and the heat source is a hot blast stove; a vertically arranged baffle plate is arranged in the drying chamber, the baffle plate divides the drying chamber into a hot air flow passage and a grain flow passage which are distributed at intervals and are not communicated with each other, the grain flow passage is communicated with the tempering bin and the collection chamber from top to bottom, and the hot air flow passage is communicated with the hot blast stove from front to back after being sealed from top to bottom; an air pipe is arranged in the hot air flow passage, and the air pipe penetrates through the hot air flow passage and is communicated with the grain flow passage; the inner side wall of the hot air flow channel is provided with a baffle plate, an interlayer is formed between the baffle plate and the baffle plate, and water is injected into the interlayer to form a water jacket interlayer. Compared with the prior art, the utility model has the following advantages: the hot air indirect heating is adopted, the heating environment of the grains is stable and uniform through the filtering of the water jacket, various heat transfer modes are comprehensively utilized, the drying efficiency is improved, and the quality of the grains is ensured.

Description

High-stability combined heat exchange type grain dryer

Technical Field

The utility model relates to a drying equipment field especially relates to a heat transfer formula grain drying-machine is united to high stability.

Background

In the field of drying, particularly in the aspect of grain drying, most of the currently adopted technologies use hot water as a medium, and directly contact with grains for heat exchange and mass transfer to achieve the drying effect. The existing grain dryer has low drying efficiency and high energy consumption, so that the production efficiency and the economic cost cannot be improved. The heat capacity of air is low, the contained energy is very limited, and the temperature is reduced quickly after passing through the grain layer; and because of reasons such as quality and taste, the surface temperature of the grain cannot exceed a certain limit in the drying process, which leads to that the heat transfer quantity cannot be increased by adopting a scheme of increasing the temperature of hot water, and finally the heat delivery quantity can be increased only by increasing the wind speed. After the wind speed is increased, a series of problems of increased kinetic energy loss, increased dust treatment capacity, noise, increased equipment cost and the like are brought, the economy is reduced, and the industry development is restricted.

The utility model provides a drying device, fundamentally has changed the structure and the heat transfer mode of traditional drying-machine, is particularly useful for the grain stoving processing that has the temperature restriction such as grain.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art not enough, provide a heat transfer formula grain drying-machine is united to high stability.

The utility model discloses a realize through following technical scheme: the utility model provides a heat transfer formula grain drying-machine is united to high stability, includes heat source and drying tower, and the drying tower from top to bottom sets up slow su storehouse, drying chamber and collection room, and the heat source is connected its characterized in that with the drying chamber: the heat source is a hot blast stove; a vertically arranged baffle plate is arranged in the drying chamber, the baffle plate divides the drying chamber into a hot air flow passage and a grain flow passage which are distributed at intervals and are not communicated with each other, the grain flow passage is communicated with the tempering bin and the collection chamber from top to bottom, and the hot air flow passage is communicated with the hot blast stove from front to back after being sealed from top to bottom; an air pipe is arranged in the hot air flow passage, penetrates through two sides of the hot air flow passage and is communicated with the grain flow passage; the inner side wall of the hot air flow channel is provided with a baffle plate, an interlayer is formed between the baffle plate and the baffle plate, and water is injected into the interlayer to form a water jacket interlayer.

As a further improvement to the above scheme, the conveying hot blast stove is a direct hot blast stove.

As a further improvement to the above scheme, the water jacket interlayers are communicated with each other.

As a further improvement of the scheme, a separation net is further arranged on one side of the inner wall of the grain flow channel and separates grains from the side wall of the grain flow channel to form a wind sleeve layer so as to prevent the grains from directly contacting the partition plate.

As a further improvement to the above, the ends of the air tube extend from the surface of the baffle plate to the surface of the screen.

As a further improvement of the scheme, the side wall of the part of the air pipe between the partition board and the partition net is provided with an air exhaust hole.

As a further improvement to the scheme, the end face of the air outlet side of the air pipe is arranged in a closed mode.

As a further improvement of the scheme, at least two hot air flow passages and at least two grain flow passages are respectively arranged.

As a further improvement of the scheme, the air pipes in the two adjacent hot air flow channels are arranged in a staggered mode.

As a further improvement to the above scheme, one side of the drying chamber is provided with an air inlet, the other side is provided with an air outlet, and the air inlet and the air outlet are communicated with the grain flow channel through an air pipe

Compared with the prior art, the utility model has the following advantages: the hot air indirect heating is adopted, the heating environment of the grains is stable and uniform through the filtering of the water jacket, various heat transfer modes are comprehensively utilized, the drying efficiency is improved, and the quality of the grains is ensured.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

FIG. 2 is a schematic sectional view showing part A-A of FIG. 1 in example 1.

Fig. 3 is a cross-sectional view of a drying chamber part in embodiment 1.

FIG. 4 is a schematic sectional view showing part A-A of FIG. 1 in example 2

Fig. 5 is a cross-sectional view of a drying chamber part in embodiment 2.

Fig. 6 is an enlarged view of the structure at the end of the air tube in embodiment 2.

Fig. 7 is an enlarged view of the structure at the end of the air tube in embodiment 3.

FIG. 8 is an enlarged view of the structure at the end of the air tube in example 4

Detailed Description

The embodiments of the present invention will be described in detail below, and the present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.

Example 1

The utility model provides a heat transfer formula grain drying-machine is united to high stability, includes heat source and drying tower, and the drying tower from top to bottom sets up slow su storehouse 11, drying chamber 12 and collection chamber 13, and the heat source is connected its characterized in that with drying chamber 12: the heat source is a hot blast stove 2; a vertically-arranged partition plate 4 is arranged in the drying chamber 12, the drying chamber 12 is divided into a hot air flow passage 7 and a grain flow passage 6 which are distributed at intervals and are not communicated with each other by the partition plate 4, the grain flow passage 6 is communicated with the tempering bin 11 and the collection chamber 13 in a vertically-through manner, and the hot air flow passage 7 is communicated with the hot blast stove 2 in a vertically-closed manner; an air pipe 5 is arranged in the hot air flow passage 7, and the air pipe 5 penetrates through two sides of the hot air flow passage 7 and is communicated with the grain flow passage 6; the inner side wall of the hot air flow passage 7 is provided with a baffle 3, an interlayer is formed between the baffle 3 and the partition plate 4, and water is injected into the interlayer to form a water jacket interlayer 31. Because the heat capacity ratio of the air is small, the temperature of the air supplied by the hot blast stove 2 is influenced by a plurality of factors such as fuel, air supply, heat exchange and the like, and is easy to fluctuate, the water jacket interlayer 31 is arranged in the hot water pipeline and can absorb the heat of hot water in the hot air flow channel 7, and because the heat capacity ratio of liquid water is large, the water jacket interlayer 31 can play a role of a filter and reduce the fluctuation of the temperature, and in addition, the liquid water is injected into the water jacket interlayer 31, so that the temperature of a contact surface with grains can be effectively limited, and the quality reduction of the grains due to high temperature in the drying process is prevented. According to the scheme, hot water is directly fed into the drying chamber 12, and the water jacket interlayer 31 is used for wall-dividing type heat exchange with grains, so that the non-contact heat exchange is realized, and the protection and heat storage of the water jacket interlayer 31 are realized, so that the temperature of the hot water can be greatly improved, the heat conveying density is improved, and the overhigh surface temperature of the grains cannot be caused; in the process of dividing wall type heat exchange, the partition plate 4 is heated and then carries out heat radiation on grains in the grain flow passage 6; in addition, in order to ensure that moisture in the grains can be quickly dissipated, the air pipe 5 sends air into the grain flow channel 6 from one side, and carries out water vapor when air is discharged from the other side, so that the air not only plays a role of discharging the water vapor when flowing between the grains, but also sends heat into the middle part from two sides of the grain flow channel 6. The air pipe 5 passes through the hot air flow passage 7, exchanges heat with hot water and then blows the hot water into the grain flow passage 6, so that the heat exchange between grains and the hot water can be further promoted. In this scheme, there are several kinds of heat transfer modes such as the dividing wall type heat transfer of hot water and grain, the dividing wall type heat transfer of air and hot water, the contact heat transfer of air and grain, baffle 4 to the heat radiation of grain simultaneously, united several kinds of heat transfer's mode, had both guaranteed thermal quick supply, also can avoid the grain temperature to exceed the alert value simultaneously.

The conveying hot blast stove 2 is a direct hot blast stove 2. Because what let in this scheme is the air in the grain runner 6, and the hot water that hot-blast furnace 2 sent into is not, consequently need not to consider impurity or other composition in the flue gas to the influence of grain, adopts direct hot-blast furnace 2, has reduced a heat transfer process for energy utilization efficiency can obtain the promotion. Meanwhile, the heat exchange process is avoided, so that the hot air temperature of the direct hot air furnace 2 can be adjusted more quickly and flexibly, and different drying requirements can be better met.

At least two hot air flow passages 7 and at least two grain flow passages 6 are respectively arranged. The high moisture content of the grain surface can limit the rising speed of the grain surface temperature, thereby prolonging the heating time of the grain. The air is when the first layer grain runner 6 of flowing through, bring out the humidity that has increased the air with moisture, when getting into lower floor grain runner 6, because air humidity increases, the moisture on grain surface loses and slows down, avoided the condition that grain overtemperature leads to grain degeneration or quality to reduce, can increase the heat time to grain simultaneously, make the inside temperature of grain obtain the improvement of higher range, accelerate moisture at the inside motion of grain, finally reach the effect that improves drying efficiency.

The air pipes 5 in the two adjacent hot air flow channels 7 are arranged in a staggered way. The air pipes 5 arranged in a staggered way can prolong the path of air as far as possible, prolong the contact time of the air and grains and improve the heat transfer and mass transfer effects.

The drying chamber 12 is provided with an air inlet 51 at one side and an air outlet 52 at the other side, and the air inlet 51 and the air outlet 52 are communicated with the grain flow passage 6 through an air pipe 5. So set up, the air can pass grain runner 6 many times, has improved the humidity in the air, reduces the speed that scatters and disappears of material surface moisture to guarantee that material surface temperature can control, avoid taking place because of the condition that the high temperature made the quality reduce.

Example 2

A high stability combined heat exchange type grain dryer as in embodiment 1, wherein the water jacket interlayers 31 are communicated with each other. The water jacket interlayers 31 are communicated with each other so that the liquid water injected therein can perform convection, thereby promoting the temperature of all the water jacket interlayers 31 to be uniform, and forming a relatively uniform temperature field in the drying chamber 12, thereby improving the stability of the drying process.

A separation net 8 is further arranged on one side of the inner wall of the grain flow channel 6, and the grain and the side wall of the grain flow channel 6 are separated by the separation net 8 to form a layer of wind sleeve 81 so as to prevent the grain from directly contacting the partition plate 4. The separation net 8 separates the grains from the partition plate 4, the partition plate 4 heated by the water jacket interlayer 31 conducts heat radiation on the grains in the grain flow channel 6, heat is transferred to the grains, and the process simulates natural airing of the grains.

Example 3

In the high-stability combined heat exchange type grain dryer as in embodiment 2, the end of the air pipe 5 extends from the surface of the partition plate 4 to the surface of the partition net 8. Because the separation net 8 is a porous structure and has weak supporting force, the shape of the separation net 8 cannot be kept under the extrusion of grains, and the separation net 8 can be directly supported by adopting the scheme that the air pipe 5 is in contact with the separation net 8, so that the shape of the air sleeve 81 is kept, and the grains are effectively isolated from the partition plate 4.

Example 4

In the high stability combined heat exchange type grain dryer according to embodiment 2, the air exhaust holes 82 are formed on the side wall of the portion of the air duct 5 between the partition plate 4 and the partition net 8. The air exhaust hole 82 is formed in the side wall of the air pipe 5, hot air in the air sleeve 81 can be blown into grains, heat transfer on the surface of the partition plate 4 is accelerated, and heat exchange efficiency is improved.

The end face of the air outlet side of the air pipe 5 is sealed. Further, the primary end face of the air outlet of the air pipe 5 is sealed, so that the air is blown over the surface of the partition plate 4, and the heat transfer is enhanced.

The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. The utility model provides a heat transfer formula grain drying-machine is united to high stability, includes heat source and drying tower, and the drying tower from top to bottom sets up slow su storehouse, drying chamber and collection room, the heat source with the drying chamber is connected its characterized in that: the heat source is a hot blast stove; the drying chamber is internally provided with a vertically arranged clapboard which divides the drying chamber into a hot air flow passage and a grain flow passage which are distributed at intervals and are not communicated with each other, the grain flow passage is communicated with the tempering bin and the collection chamber in a vertically through manner, and the hot air flow passage is communicated with the hot blast stove in a vertically through manner before and after being sealed; an air pipe is arranged in the hot air flow passage, penetrates through two sides of the hot air flow passage and is communicated with the grain flow passage; the hot air flow passage is characterized in that a baffle is arranged on the inner side wall of the hot air flow passage, an interlayer is formed between the baffle and the baffle, and water is injected into the interlayer to form a water jacket interlayer.

2. The high-stability combined heat exchange type grain dryer as claimed in claim 1, wherein: the conveying hot blast stove is a direct hot blast stove.

3. The high-stability combined heat exchange type grain dryer as claimed in claim 1, wherein: the water jacket interlayers are communicated with each other.

4. The high-stability combined heat exchange type grain dryer as claimed in claim 1, wherein: and a separation net is further arranged on one side of the inner wall of the grain flow channel and separates grains from the side wall of the grain flow channel to form a layer of air jacket to prevent the grains from directly contacting the partition plate.

5. The high-stability combined heat exchange type grain dryer as claimed in claim 4, wherein: the ends of the air tubes extend from the surface of the baffle plate to the surface of the screen.

6. The high-stability combined heat exchange type grain dryer as claimed in claim 5, wherein: and air exhaust holes are formed in the side wall of the part, located between the partition plate and the partition net, of the air pipe.

7. The high-stability combined heat exchange type grain dryer as claimed in claim 6, wherein: the end face of the air outlet side of the air pipe is arranged in a closed mode.

8. The high-stability combined heat exchange type grain dryer as claimed in claim 1, wherein: at least two hot air flow passages and at least two grain flow passages are respectively arranged.

9. The high-stability combined heat exchange type grain dryer as claimed in claim 1, wherein: the air pipes in the two adjacent hot air flow channels are arranged in a staggered mode.

10. The high-stability combined heat exchange type grain dryer as claimed in claim 1, wherein: one side of the drying chamber is provided with an air inlet, the other side of the drying chamber is provided with an air outlet, and the air inlet and the air outlet are communicated with the grain flow channel through an air pipe.