CN220981878U - Bran drying device - Google Patents

Abstract

The utility model relates to a bran drying device which comprises a first buffer tank, wherein a first solid material conveying pipe is arranged at the bottom of the first buffer tank, a first moisture content sensor and a blanking device are arranged on the first solid material conveying pipe, a first end of a tee joint is arranged on the first solid material conveying pipe, a first hot gas conveying pipe is arranged at the second end of the tee joint, an electric heater, a gas flow sensor and a fan are arranged on the first hot gas conveying pipe, a second buffer tank is communicated with the third end of the tee joint, a cyclone separator is communicated with the second buffer tank, the cyclone separator is communicated with the first buffer tank, the inscribed circle diameter of the bottom of the second buffer tank is gradually increased along with the increase of the height, and the inscribed circle diameter of the top of the second buffer tank is gradually decreased along with the increase of the height. The contact area between the air with low moisture content and the bran can be increased, so that the drying efficiency is improved. The utility model is convenient to adjust and use and has wide market prospect.

Description

Bran drying device

Technical Field

The utility model relates to the field of bran drying equipment, in particular to a bran drying device

Background

Bran is an important byproduct of flour mill, is rich in nutrition, and is an unattainable feed raw material. The wheat bran produced under the restriction of the technological parameters of flour preparation has high moisture and is easy to be rotten and spoiled. GB/T1355-2021 wheat flour specifies a moisture content of not more than 14.5%, which tends to cause an increase in the moisture content of the bran. The existing bran drying device comprises an electric heating auger for drying, a vertical hot-blast stove for heating and drying, and also has different forms of drying through an electric heating fluidized bed and the like.

However, since the bran itself has combustibility, the heat source directly contacting the bran should be maintained within a proper range so that moisture in the bran is volatilized and the probability of burning of the bran itself can be reduced. In addition, the drying efficiency is improved due to the two factors, namely, the heating temperature is in a proper range; in addition, the air with low moisture content can fully replace the evaporated water vapor so as to improve the drying efficiency, more or less bran which is dried in the same batch cannot fully contact with the air with low moisture content so as to replace the water vapor nearby the bran, so that the moisture contents of the bran at different positions in the drying equipment are different at the same time, and the drying efficiency is worth improving and is improved so as to improve the drying efficiency of the bran, thereby improving the production efficiency of enterprises.

Disclosure of Invention

Aiming at the defects in the prior art, the utility model provides a bran drying device capable of increasing the contact area of air with low moisture content and bran so as to improve the drying efficiency, which is used for overcoming the defects in the prior art.

The utility model adopts the technical scheme that: the utility model provides a bran drying device, including first buffer tank, the bottom of first buffer tank be provided with the entrance point of first solid material conveyer pipe, first solid material conveyer pipe has set gradually first moisture content sensor, the glassware down along being close to first buffer tank to keeping away from the direction of first buffer tank, be provided with three-way first end on the exit end of first solid material conveyer pipe, three-way second end is provided with first steam conveyer pipe, electric heater has been set gradually along being close to three-way to keeping away from the direction on the first steam conveyer pipe, gas flow sensor and fan, the intercommunication has the bottom of second buffer tank on three-way third end, the intercommunication has cyclone's feed end on the top of second buffer tank, cyclone's solid phase exit end and the top of first buffer tank are linked together, the inscribed circle diameter of second buffer tank bottom increases gradually along with the increase of height, inscribed circle diameter of second buffer tank top increases gradually along with the increase of height.

Preferably, the gas phase outlet end of the cyclone separator is communicated with a first tail gas conveying pipe, the first tail gas conveying pipe is provided with an air inlet end of the dust remover, the gas phase outlet end of the dust remover is communicated with a second tail gas conveying pipe, and the second tail gas conveying pipe is provided with a second moisture content sensor.

Preferably, a first stop valve is arranged on the first solid material conveying pipe between the first moisture content sensor and the blanking device, a second stop valve is arranged on the first solid material conveying pipe between the blanking device and the tee joint, a second solid material conveying pipe is arranged on the first solid material conveying pipe between the second stop valve and the blanking device, a third stop valve is arranged on the second solid material conveying pipe, and a blanking motor is arranged on the blanking device.

Preferably, a first temperature sensor is arranged on the first hot gas conveying pipe between the electric heater and the tee joint.

Preferably, a fourth stop valve is arranged on a second tail gas conveying pipe on one side, far away from the dust remover, of the second moisture content sensor, a water removing device and a hot air return pipe are sequentially communicated on the second tail gas conveying pipe between the fourth stop valve and the second moisture content sensor, and the water removing device comprises a water removing conveying pipe, an adsorption pipe arranged on the water removing conveying pipe, a molecular sieve layer arranged in the adsorption pipe and fifth stop valves respectively arranged on the water removing conveying pipes on two sides of the adsorption pipe; the hot air return pipe is communicated with the first hot air conveying pipe.

Preferably, a wind mixer is arranged between the hot air return pipe and the first hot air conveying pipe, and the wind mixer comprises a tank body, a bypass air inlet pipe arranged on the tank body, a cone arranged in the tank body between the outlet end of the tank body and the outlet end of the bypass air inlet pipe and a mixing blade arranged in the tank body between the cone and the outlet end of the tank body; the inlet end of the bypass air inlet pipe is communicated with a hot air return pipe, the outlet end of the tank body is communicated with a first hot air conveying pipe, a first regulating valve and a second temperature sensor are arranged on the hot air return pipe, the outlet end of the air conveying pipe is arranged at the inlet end of the tank body, a second regulating valve is arranged on the air conveying pipe, and an air filter is arranged at the inlet end of the air conveying pipe.

The utility model has the beneficial effects that: firstly, the shape of the inner cavity of the second buffer tank is utilized to increase the contact area of the air with low moisture content and the bran in the drying process, and the contact time of hot air flow and the bran is increased, so that the drying efficiency is improved.

Secondly, the water removing device comprises a water removing conveying pipe, an adsorption pipe arranged on the water removing conveying pipe, a molecular sieve layer arranged in the adsorption pipe and fifth stop valves respectively arranged on the water removing conveying pipes at two sides of the adsorption pipe; the number of the water removing devices is a plurality of, and the water removing devices are connected in parallel, so that the water removing continuity is improved.

Finally, a first temperature sensor is arranged on a first hot gas conveying pipe between the electric heater and the tee joint; the first temperature sensor is arranged so as to feed back the temperature parameter of the conveying medium in the first hot gas conveying pipe.

The utility model has the advantages of simple structure, convenient operation, ingenious design, great improvement of working efficiency, good social and economic benefits and easy popularization and use.

Drawings

Fig. 1 is a schematic structural view of the present utility model.

Fig. 2 is an enlarged partial schematic view of detail a of fig. 1.

Fig. 3 is an enlarged partial schematic view of detail B of fig. 1.

Fig. 4 is a schematic cross-sectional structure of the air mixer of the present utility model.

Detailed Description

As shown in fig. 1 to 4, a bran drying device comprises a first buffer tank 1, a level gauge is arranged in the first buffer tank 1, the bottom of the first buffer tank 1 is provided with an inlet end of a first solid material conveying pipe 2, the first solid material conveying pipe 2 is sequentially provided with a first moisture content sensor 3 and a blanking device 4 along a direction from the first buffer tank 1 to a direction away from the first buffer tank 1, the outlet end of the first solid material conveying pipe 2 is provided with a first end of a tee joint 5, the second end of the tee joint 5 is provided with a first hot gas conveying pipe 6, the first hot gas conveying pipe 6 is sequentially provided with an electric heater 7, a gas flow sensor 8 and a fan 9 along a direction from the tee joint 5 to the tee joint 5, the third end of the tee joint 5 is communicated with the bottom end of a second buffer tank 10, the top end of the second buffer tank 10 is communicated with the feeding end of a cyclone separator 11, the outlet end of the cyclone separator 11 is communicated with the top end of the first buffer tank 1, the second buffer tank 10 is gradually increased in diameter along with the height of the bottom of the second buffer tank 10, and the diameter of the second buffer tank 10 gradually increases along with the height of the top of the second buffer tank 10, and the diameter of the top of the second buffer tank gradually increases along with the height of the circle increases.

The first stop valve 16 is arranged on the first solid material conveying pipe 2 between the first moisture content sensor 3 and the blanking device 4, the second stop valve 17 is arranged on the first solid material conveying pipe 2 between the blanking device 4 and the tee joint 5, the second solid material conveying pipe 18 is arranged on the first solid material conveying pipe 2 between the second stop valve 17 and the blanking device 4, the third stop valve 19 is arranged on the second solid material conveying pipe 18, and the blanking motor 20 is arranged on the blanking device 4. The gas phase outlet end of the cyclone separator 11 is communicated with a first tail gas conveying pipe 12, the first tail gas conveying pipe 12 is provided with an air inlet end of a dust remover 13, the gas phase outlet end of the dust remover 13 is communicated with a second tail gas conveying pipe 14, and the second tail gas conveying pipe 14 is provided with a second moisture content sensor 15. The second moisture content sensor 15 is arranged to facilitate feedback of a moisture content parameter of the transport medium through the second exhaust gas transport pipe 14.

Further, the tail gas conveyed through the second tail gas conveying pipe 14 has heat, but the moisture content in the tail gas is different due to the fact that the bran is dried for many times, when the moisture content in the tail gas is too high, the consumption of the moisture in the tail gas is too high, and when the moisture content is lower than a preset value, the tail gas can be utilized. Therefore, a fourth stop valve 22 is arranged on the second tail gas conveying pipe 14 at one side of the second moisture content sensor 15 far away from the dust remover 13, a water removing device and a hot air return pipe 23 are sequentially communicated with the second tail gas conveying pipe 14 between the fourth stop valve 22 and the second moisture content sensor 15, and the water removing device comprises a water removing conveying pipe 24, an adsorption pipe 25 arranged on the water removing conveying pipe 24, a molecular sieve layer 26 arranged in the adsorption pipe 25 and fifth stop valves 27 respectively arranged on the water removing conveying pipes 24 at two sides of the adsorption pipe 25; the number of the water removing devices is a plurality of, and the water removing devices are connected in parallel, so that the water removing continuity is improved.

The hot air return pipe 23 is communicated with the first hot air delivery pipe 6. A wind mixer is arranged between the hot air return pipe 23 and the first hot air conveying pipe 6, and comprises a tank 28, a bypass air inlet pipe 29 arranged on the tank 28, a cone 30 arranged in the tank 28 between the outlet end of the tank 28 and the outlet end of the bypass air inlet pipe 29, and a mixing blade 31 arranged in the tank 28 between the cone 30 and the outlet end of the tank 28; the inlet end of the bypass air inlet pipe 29 is communicated with the hot air return pipe 23, the outlet end of the tank 28 is communicated with the first hot air conveying pipe 6, the hot air return pipe 23 is provided with a first regulating valve 32 and a second temperature sensor 33, the inlet end of the tank 28 is provided with the outlet end of an air conveying pipe 34, the air conveying pipe 34 is provided with a second regulating valve 35, and the inlet end of the air conveying pipe 34 is provided with an air filter 36. Furthermore, the number of the mixing blades 31 is a plurality, the mixing blades 31 are uniformly distributed on the outer side of the central axis of the cone 30 in a star shape, and the central axis of the cone 30, the central axis of the outlet end of the bypass air inlet pipe 29 and the central axis of the tank 28 are located on the same axis.

A first temperature sensor 21 is arranged on the first hot gas conveying pipe 6 between the electric heater 7 and the tee joint 5. The first temperature sensor 21 is installed to facilitate feedback of the temperature parameter of the transport medium in the first hot gas transport pipe 6.

The application method of the product is as follows: as shown in fig. 1 to 4, before formally performing the drying process, the pre-operation stage of the product should be completed, and the specific steps are as follows: firstly, bran to be dried is conveyed to the first buffer tank 1 to the feed-back level height of the level gauge in the first buffer tank 1. Then, the fan 9 and the second regulating valve 35 are opened, the outside atmosphere is filtered by the air filter 36 and then is conveyed to the first hot gas conveying pipe 6 through the air conveying pipe 34 and the tank 28 in sequence, and then is conveyed to the electric heater 7 for heating after being driven by the fan 9 on the first hot gas conveying pipe 6 and then is conveyed to the electric heater 7 after being fed back by the air flow sensor 8, and the heated air is conveyed to the inner cavity of the second buffer tank 10 through the first temperature sensor 21 for feeding back the temperature parameter and then is sequentially conveyed to the second tail gas conveying pipe 14 through the inlet end of the cyclone separator 11, the gas phase outlet end of the cyclone separator 11, the first tail gas conveying pipe 12, the inlet end of the dust remover 13 and the gas phase outlet end of the dust remover 13 and then is emptied. After the second buffer tank 10 is operated for a preset time, stable air flow can be formed and the output power of the electric heater 7 tends to be stable, and the drying process can be performed after the parameters fed back by the first temperature sensor 21 reach a preset range.

The formal bran drying process is carried out on the basis of pre-operation, and comprises the following specific steps:

S1, a blanking motor 20, a first stop valve 16 and a second stop valve 17 are opened, the blanking motor 20 drives a blanking device 4 to work, bran temporarily stored in a first buffer tank 1 is fed into a first end of a tee joint 5 through a first solid material conveying pipe 2 under the drive of the blanking device 4, and is mixed with hot air flow sent through a second end of the tee joint 5 and passing through an electric heater 7, and then is fed into a second buffer tank 10, under the guidance of the bottom of the second buffer tank 10, the pressure of hot air flow speed drops correspondingly, the speed of the bran moving towards the top of the second buffer tank 10 along with the drop of the hot air flow speed drops, in the process, the hot air flow gives the corresponding bran a drop of the driving force moving towards the top of the second buffer tank 10, and the acceleration formed after the driving force overcomes the gravity of the corresponding bran is reduced, so that the hot air flow fully contacts with the bran entering the inside the second buffer tank 10 in the process of drying, and the water vapor volatilized around the corresponding bran fully contacts and the bran is quickly evaporated, and the phase change heat required by the evaporation of the water is provided by the carried heat. When the bran reaches the top of the second buffer tank 10, the hot air flow is guided by the top of the second buffer tank 10, the rising pressure of the air flow also rises, the bran is quickly sent to the cyclone separator 11 through the top of the second buffer tank 10, the solid phase component is sent back to the first buffer tank 1 after the first gas-solid separation is carried out by the cyclone separator 11, the gas phase component is sent to the dust remover 13 for the second gas-solid separation, and the gas phase component is sent to the second tail gas conveying pipe 14.

S2, after a part of bran entering the first buffer tank 1 enters the first solid material conveying pipe 2 and the moisture parameter is fed back by the first moisture content sensor 3 on the first solid material conveying pipe 2, if the moisture parameter is still higher than a preset value, the step S1 is executed again to dry the bran again; when the first moisture content sensor 3 feeds back the moisture parameter to reach the preset drying requirement, the third stop valve 19 needs to be opened, the second stop valve 17 needs to be closed, and the dried bran is sent to the next process.

S3, when the moisture parameter fed back by the second moisture content sensor 15 is below a preset value, the fourth stop valve 22 is closed, the hot air flow of the second tail gas conveying pipe 14 sequentially passes through the water removing device in a working state to be subjected to water vapor adsorption, the hot air is fed into the hot air return pipe 23 to feed back the temperature through the second temperature sensor 33, then is fed into the bypass air inlet pipe 29 to be fed into the inner cavity of the tank 28, the cone 30 is combined with the air conveyed into the inner cavity of the tank 28 by the air conveying pipe 34 under the action of the mixing blade 31, the air is directly mixed with the air filtered by the air filter 36, after heat exchange is finished, the flow is fed back by the air flow sensor 8, the air is heated by the electric heater 7 to form a hot air flow, and the output power of the electric heater 7 and the opening of the second regulating valve 35 are required to be regulated by the air flow sensor 8 according to the parameter fed back by the first temperature sensor 21.

In step S3, the filtered air conveyed from the air conveying pipe 34 is a supplementary air flow, which mainly overcomes the leakage of the hot air flow caused by the air leakage of the system, and the main air flow is the backflow hot air returned to the inner cavity of the tank 28 by the hot air return pipe 23, so that the heat carried by the low-moisture tail gas is fully utilized, and the output power of the electric heater 7 is further reduced, so that the electric energy is saved.

By the embodiment, the contact area of the air with low moisture content and the bran is increased in the drying process by utilizing the shape of the inner cavity of the second buffer tank 10, and the contact time of hot air flow and the bran is increased, so that the drying efficiency is improved.

The above-described embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model, so that all equivalent changes or modifications of the structure, characteristics and principles described in the claims should be included in the scope of the present utility model.

Claims (6)

1. The utility model provides a bran drying device which characterized in that: including first buffer tank (1), the bottom of first buffer tank (1) be provided with the entrance point of first solid material conveyer pipe (2), first solid material conveyer pipe (2) have set gradually first moisture content sensor (3) in the direction of keeping away from first buffer tank (1) along being close to first buffer tank (1), glassware (4) down, be provided with the first end of tee bend (5) on the exit end of first solid material conveyer pipe (2), the second end of tee bend (5) is provided with first steam conveyer pipe (6), be close to tee bend (5) along being close to on first steam conveyer pipe (6) to keeping away from the direction of tee bend (5) in proper order have set gradually electric heater (7), gas flow sensor (8) and fan (9), the intercommunication has the bottom of second buffer tank (10) on the third end of tee bend (5), the intercommunication has the feed end of cyclone (11) on the top of second buffer tank (10), the solid phase exit end of cyclone (11) and the first buffer tank (1) the bottom of second buffer tank (10) increases with the diameter of the inscribed circle of second buffer tank (10) and the diameter increases gradually.

2. The bran drying apparatus according to claim 1, wherein: the cyclone separator is characterized in that a gas phase outlet end of the cyclone separator (11) is communicated with a first tail gas conveying pipe (12), an air inlet end of a dust remover (13) is arranged on the first tail gas conveying pipe (12), a second tail gas conveying pipe (14) is communicated with a gas phase outlet end of the dust remover (13), and a second moisture content sensor (15) is arranged on the second tail gas conveying pipe (14).

3. The bran drying apparatus according to claim 1, wherein: the novel material feeding device is characterized in that a first stop valve (16) is arranged on a first solid material conveying pipe (2) between the first moisture content sensor (3) and the material discharging device (4), a second stop valve (17) is arranged on the first solid material conveying pipe (2) between the material discharging device (4) and the tee joint (5), a second solid material conveying pipe (18) is arranged on the first solid material conveying pipe (2) between the second stop valve (17) and the material discharging device (4), a third stop valve (19) is arranged on the second solid material conveying pipe (18), and a material discharging motor (20) is arranged on the material discharging device (4).

4. The bran drying apparatus according to claim 1, wherein: a first temperature sensor (21) is arranged on the first hot gas conveying pipe (6) between the electric heater (7) and the tee joint (5).

5. Bran drying apparatus according to claim 2 wherein: a fourth stop valve (22) is arranged on a second tail gas conveying pipe (14) at one side, far away from the dust remover (13), of the second moisture content sensor (15), a water removing device and a hot air return pipe (23) are sequentially communicated on the second tail gas conveying pipe (14) between the fourth stop valve (22) and the second moisture content sensor (15), and the water removing device comprises a water removing conveying pipe (24), an adsorption pipe (25) arranged on the water removing conveying pipe (24), a molecular sieve layer (26) arranged in the adsorption pipe (25) and fifth stop valves (27) respectively arranged on the water removing conveying pipes (24) at two sides of the adsorption pipe (25); the hot air return pipe (23) is communicated with the first hot air conveying pipe (6).

6. The bran drying apparatus as claimed in claim 5, wherein: a wind mixer is arranged between the hot air return pipe (23) and the first hot air conveying pipe (6), and comprises a tank body (28), a bypass air inlet pipe (29) arranged on the tank body (28), a cone (30) arranged in the tank body (28) between the outlet end of the tank body (28) and the outlet end of the bypass air inlet pipe (29) and a mixing blade (31) arranged in the tank body (28) between the cone (30) and the outlet end of the tank body (28); the inlet end of the bypass air inlet pipe (29) is communicated with the hot air return pipe (23), the outlet end of the tank body (28) is communicated with the first hot air conveying pipe (6), the hot air return pipe (23) is provided with a first regulating valve (32) and a second temperature sensor (33), the inlet end of the tank body (28) is provided with the outlet end of the air conveying pipe (34), the air conveying pipe (34) is provided with a second regulating valve (35), and the inlet end of the air conveying pipe (34) is provided with an air filter (36).