CN218011090U

CN218011090U - Novel collision flow dryer

Info

Publication number: CN218011090U
Application number: CN202222004198.3U
Authority: CN
Inventors: 史勇春; 张洪建; 吴静; 王宏耀; 尹凤交; 刘峰; 邢召良; 刘法鑫
Original assignee: Shandong Tianli Energy Co ltd
Current assignee: Shandong Tianli Energy Co ltd
Priority date: 2022-08-01
Filing date: 2022-08-01
Publication date: 2022-12-13
Anticipated expiration: 2032-08-01

Abstract

The utility model relates to a novel collision flow desiccator belongs to industrial drying equipment technical field. The impinging stream dryer comprises a dryer shell, a feeding mechanism, an air supply mechanism and a dry material separation mechanism, wherein an impinging drying chamber is arranged inside the dryer shell, the feeding mechanism comprises a plurality of feeding spray heads, the feeding spray heads are uniformly distributed on the upper part of the drying chamber, the spraying direction is downward, the air supply mechanism is positioned at the bottom of the drying chamber, the air outlet direction is upward, a plurality of air outlets are formed in the top of the dryer shell, and the dry material separation mechanism is connected with the air outlets through pipelines. The utility model discloses a novel impinging stream desiccator utilizes impinging stream drying principle, and drying strength is big, and the throughput is strong.

Description

Novel collision flow dryer

Technical Field

The utility model relates to an industrial drying equipment technical field, concretely relates to novel impinging stream desiccator.

Background

The impinging stream drying is a new drying technology, and the biggest characteristic of the impinging stream drying is high-strength drying effect. The heat and mass transfer between the gas flow and the material can be well completed within a period of several seconds, and the mechanism is the high turbulence, reciprocating oscillation and penetrating action of particles in the gas flow. The existing vertical impinging stream drying device mainly comprises a fan, an electric heater, a screw feeder, a vertical impinging chamber, a cyclone separator, an electric cabinet and the like. The working process is as follows: air is sent into the system by a fan, and enters the collision chamber from the upper path and the lower path after being heated. The wet material is fed into the upper air inlet pipe by the feeding machine, mixed with hot air and fed into the collision chamber. After colliding, the air and the materials are subjected to heat and mass transfer, and the dried materials and the air are separated in a cyclone separator to obtain a dried product.

The existing impinging stream drying technology mainly has the following defects:

(1) The existing impinging stream drying technology is mainly used for the drying process of grains, wood chips and the like at present and is not suitable for drying slurry materials or solutions;

(2) When the existing impinging stream dryer is used for treating slurry materials or solution, the wall surface of the drying chamber is easy to stick to the wall and cannot stably run for a long time;

(3) The existing impinging stream dryer is easy to accumulate materials and uneven in air distribution;

(4) The single machine processing capacity of the current collision flow dryer is small;

(5) The current impinging stream drying technology can only be used for primary drying and is not suitable for deep drying (the water content of a dried product is less than or equal to 5 percent).

Disclosure of Invention

For solving the problem among the prior art, the utility model discloses a novel impinging stream desiccator has been designed to solve current impinging stream desiccator and be not suitable for the dry problem of liquid material.

The utility model adopts the technical proposal that: the impinging stream dryer comprises a dryer shell, a feeding mechanism, an air supply mechanism and a dry material separation mechanism, wherein the dryer shell is cylindrical, an impinging drying chamber is arranged in the dryer shell, the feeding mechanism comprises a plurality of feeding spray heads, the feeding spray heads are uniformly distributed on the upper part of the drying chamber, the spraying direction is downward, the air supply mechanism is positioned at the bottom of the drying chamber, the air outlet direction is upward, a plurality of air outlets are formed in the top of the dryer shell, and the dry material separation mechanism is connected with the air outlets through pipelines. Liquid materials are injected into the drying chamber from top to bottom through the feeding mechanism by the feeding spray head, high-temperature drying air is blown into the drying chamber from bottom to top by the air supply mechanism at a high speed, the liquid materials and the drying air collide at a high speed in the drying chamber to form a turbulent flow zone for heat exchange, the drying of the liquid materials is completed, and the dried materials are sent into the separation mechanism for material collection.

Furthermore, the feeding nozzle is a two-fluid nozzle and is respectively connected with a feeding pump and a compressed air source through pipelines. The two fluid nozzles complete the mixing of compressed air and material, atomize liquid material into small liquid drops and spray the small liquid drops into the drying chamber, so that the drying efficiency is improved.

Furthermore, the air supply mechanism is connected with an air inlet device through a pipeline, the air inlet device comprises an air blower and an air heating device which are connected through a pipeline, the air supply mechanism is one or divided into a plurality of air distribution chambers, and the air distribution chambers are in one-to-one correspondence with the feeding nozzles of the feeding mechanism and are respectively positioned under the feeding nozzles. The air distribution chamber and the feeding nozzle are arranged oppositely, so that the collision effect is improved.

Furthermore, the upper side of the air distribution chamber is separated by a layer of air distribution plate, the air distribution plate is composed of a plurality of layers of pore plates, a plurality of air outlet holes are uniformly distributed on each layer of pore plate, and the air outlet holes of two adjacent layers of pore plates are vertically staggered. The air distribution plate plays a role in uniform and stable air flow.

Furthermore, the center department of air distribution plate just opens the air outlet that has the large aperture to the feeding shower nozzle of top, the air outlet passes through independent air inlet pipeline and connects hot blast blowpipe apparatus. The air outlet with large aperture increases the air output, and the effect of intensifying turbulence is achieved.

Furthermore, dry material separating mechanism includes pipeline connection's cyclone and draught fan, the desiccator casing is opened to the bottom side of drying chamber has the large granule material export to be connected with the discharge valve. The cyclone separator is a main material collecting mechanism, and partial large-particle materials cannot enter the cyclone separator along with wind and are discharged from a large-particle material outlet.

Furthermore, a circle of wall sweeping air pipes are arranged on the inner side of the dryer shell and above the drying chamber, and a plurality of air ports are arranged on the wall sweeping air pipes to blow air to the inner wall of the shell. The wall sweeping air pipe is connected with the air pump to continuously or regularly sweep the inner wall of the drying chamber, so that the materials are prevented from being bonded on the inner wall of the drying chamber.

Compared with the prior art, the utility model discloses a novel impinging stream desiccator's of patent design progress part lies in: the impinging stream dryer utilizes the impinging stream drying technical principle, and the liquid material and the drying air are vertically collided at high speed in the drying chamber in the vertical direction by the feeding nozzle and the air distribution chamber to form turbulence to finish heat exchange, so that the drying of the liquid material is realized, and the drying efficiency of the material is greatly improved; by introducing a spraying technology, after the feed slurry is atomized into fine liquid drops, the contact area of the slurry and hot air is increased, the drying efficiency is greatly improved, and the moisture content of a dried product can be dried to be less than or equal to 2%; moreover, a plurality of spray heads can be arranged on a single device, so that the single device has large treatment capacity; the air supply mechanism is provided with the air distribution chamber, and the air distribution plate is arranged on the air distribution chamber, so that the stability of air pressure in the drying chamber is ensured, the air distribution is uniform, and the uniformity and the stability of a dried product are ensured; the wall sweeping air pipe is arranged in the drying chamber, so that small drops colliding with turbulence in the drying chamber are prevented from being adhered to the wall surface due to incomplete drying, and the long-period stable operation of the drying system is ensured.

Drawings

Fig. 1 is a schematic structural diagram of a novel impinging stream dryer.

Fig. 2 is a partial top view structural schematic diagram of a wind distribution plate of the novel impinging stream dryer.

Fig. 3 is a schematic view of a partial section structure of a wind distribution plate of the novel impinging stream dryer.

Fig. 4 is a schematic top view of a part of an air distribution plate of a second embodiment of the novel impinging stream dryer.

Fig. 5 is a schematic view of a partial cross-sectional structure of an air distribution plate of a second embodiment of the novel impinging stream dryer.

In the figure, 1 a dryer shell, 2 a drying chamber, 3 a feeding spray head, 4 a cyclone separator, 5 an induced draft fan, 6 an air blower, 7 an air heater, 8 an air distribution chamber, 11 a wall sweeping air pipe, 12 an air outlet, 13 a large-particle material outlet, 14 a discharge valve, 31 a feeding pipeline, 32 an air pipeline, 81 an air distribution plate, 82 a pore plate, 83 an air outlet and 84 an air outlet.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and specific embodiments. The technical solutions in the embodiments of the present invention are clearly and completely described, and the described embodiments are only some embodiments of the present invention, not all embodiments of the present invention. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without any creative effort belong to the protection scope of the present invention.

Example 1

As shown in fig. 1, 2 and 3, the utility model discloses a first embodiment of a novel impinging stream dryer, which comprises a dryer shell 1, a feeding mechanism, an air supply mechanism and a dry material separating mechanism, wherein the dryer shell 1 is of a closed columnar structure, and an impinging drying chamber 2 is arranged inside the dryer shell. The feeding mechanism is positioned at the upper part of the drying chamber 2 and comprises 4 feeding spray heads 3, and the 4 feeding spray heads 3 are uniformly distributed at the upper part of the drying chamber 2 and have downward spraying directions. The feeding spray head 3 is a two-fluid spray head and can be selected to be an internal mixing type or an external mixing type. The feeding spray head 3 is respectively connected with a feeding pump and a compressed air source through a feeding pipeline 31 and an air pipeline 32, the compressed air and the materials are mixed in the spray head, the volume ratio of liquid and gas entering the spray head is controlled to be 1.

The air supply mechanism is positioned at the bottom of the drying chamber 2, the air outlet direction is upward, and a distance of 500-3000 mm is reserved between the air supply mechanism and the discharge nozzle. The air supply mechanism is connected with the air inlet device through a pipeline. The air intake device comprises a blower 6 and an air heater 7 which are connected through pipelines. The air supply mechanism is divided into 4 air distribution chambers 8, the 4 air distribution chambers 8 are arranged side by side, correspond to the 4 feeding nozzles 3 one by one and are respectively positioned under the feeding nozzles 3. The bottom of the air distribution chamber 8 is an inclined plane and gradually rises from the air inlet end to the inside, thus playing the role of pressure equalization. The top end of the air distribution chamber 8 is sealed with an air distribution plate 81, and the air distribution plate 81 is composed of two layers of pore plates 82. A plurality of air outlet holes 83 are uniformly distributed on the pore plate 82, and the air outlet holes 83 of the two layers of pore plates 82 are vertically staggered, so that the effect of uniform air is achieved. The top of the dryer shell 1 is provided with a plurality of air outlets 12, and the dry material separating mechanism is connected with the air outlets 12 through pipelines. The dry material separating mechanism comprises a cyclone separator 4 and a draught fan 5 which are connected through pipelines. The induced draft fan 5 provides negative pressure, and introduces the material airflow dried in the drying chamber into the cyclone separator 4. The cyclone separator 4 is a main material collecting mechanism, and the separated tail gas is purified and then is emptied. The dryer housing 1 is provided with a large-particle material outlet 13 on the bottom side of the drying chamber 2 and is connected with a discharge valve 14. Part of the large-particle materials cannot enter the cyclone separator along with the wind and are discharged from the large-particle material outlet 13.

In addition, a circle of wall sweeping air pipes 11 are arranged at the upper part of the drying chamber 2 at the inner side of the dryer shell 1, and a plurality of air outlets are arranged on the wall sweeping air pipes 11 to blow air to the inner wall of the shell. The wall sweeping air pipe 11 is connected with an air pump to provide high-pressure blowing air, the inner wall of the drying chamber 2 is continuously blown and swept in the drying process, and materials are prevented from being bonded on the inner wall of the drying chamber 2.

Example 2

The utility model discloses a novel collision flow desiccator's second kind embodiment, collision flow desiccator and embodiment 1's difference lie in the structure of grid plate 81 in this embodiment, open the air outlet 84 that has the heavy-calibre at grid plate 81's middle part, and air outlet 84 provides independent blowing through independent air inlet line connection hot blast blowpipe apparatus. The air outlet 84 is just opposite to the lower part of the feeding nozzle 3, so that the effect of enhancing material turbulence is achieved, and the drying efficiency is improved.

The above description is only for the preferred embodiment of the present invention, and it should not be construed as limiting the scope of the invention, and all the equivalent changes and modifications made by the claims and the description of the invention are also included in the scope of the present invention.

Claims

1. The utility model provides a novel impinging stream desiccator, its characterized in that, impinging stream desiccator includes desiccator casing, feed mechanism, air supply mechanism and dry material separating mechanism, the desiccator casing is the cylindricality, and its inside is the colliding drying chamber, feed mechanism includes a plurality of feeding shower nozzles, and a plurality of feeding shower nozzles equipartitions are on the upper portion of drying chamber, and the direction of injection is down, air supply mechanism is located the bottom of drying chamber, and the air-out direction is up, open at the top of desiccator casing has a plurality of air outlets, dry material separating mechanism passes through the pipeline and is connected with the air outlet.

2. The novel impinging stream dryer of claim 1, wherein the feed nozzle is a two-fluid nozzle, and is connected with a feed pump and a compressed air source through pipelines respectively.

3. The novel impinging stream dryer as claimed in claim 2, wherein the air supply mechanism is connected with an air intake device through a pipeline, the air intake device comprises an air blower and an air heating device which are connected through a pipeline, the air supply mechanism is one or divided into a plurality of air distribution chambers, and the plurality of air distribution chambers are in one-to-one correspondence with the feeding nozzles of the feeding mechanism and are respectively positioned under the feeding nozzles.

4. The novel impinging stream dryer as claimed in claim 3, wherein the air distribution chamber is separated from the upper side by a layer of air distribution plate, the air distribution plate is composed of multiple layers of orifice plates, each layer of orifice plate is uniformly provided with a plurality of air outlets, and the air outlets of two adjacent layers of orifice plates are vertically staggered.

5. The novel impinging stream dryer as claimed in claim 4, wherein the feeding nozzle directly above the center of the air distribution plate is provided with a large-aperture air outlet, and the air outlet is connected with the air inlet device through an independent air inlet pipeline.

6. The novel impinging stream dryer as claimed in claim 1, wherein the dry material separating mechanism comprises a cyclone separator and an induced draft fan which are connected by pipelines, and the dryer shell is provided with a large particle material outlet on the bottom side surface of the drying chamber and is connected with a discharge valve.

7. The novel impinging stream dryer as claimed in claim 1, wherein the inner side of the dryer housing is provided with a circle of wall-sweeping wind pipes at the upper part of the drying chamber, and the wall-sweeping wind pipes are provided with a plurality of wind ports arranged to blow air to the inner wall of the housing.