CN214105840U

CN214105840U - Novel nozzle of spray dryer

Info

Publication number: CN214105840U
Application number: CN202022692314.6U
Authority: CN
Inventors: 孙涛; 王斯诺; 徐勇军; 王亚芳
Original assignee: Guangdong College of Industry and Commerce
Current assignee: Guangdong College of Industry and Commerce
Priority date: 2020-11-19
Filing date: 2020-11-19
Publication date: 2021-09-03
Anticipated expiration: 2030-11-19

Abstract

A novel spray nozzle of a spray dryer comprises a rear seat internally provided with a hollow pipeline, a front cover provided with a nozzle, and a first spray sheet, a second spray sheet and a rotary sheet which are sequentially arranged from the nozzle to the rear seat; the rear seat is connected with the front cover; the rear end of the front cover is provided with a drainage hole, a flow deflector and a baffle plate in sequence from the nozzle direction, the flow deflector is a circular ring provided with a plurality of channels on the ring wall, and the baffle plate is fixedly arranged in the front cover and is abutted against the flow deflector; the first spraying piece and the second spraying piece are both in a similar ring shape, the first spraying piece is arranged against the second spraying piece, and a cyclone chamber with a spherical cavity can be formed between the first spraying piece and the second spraying piece; the rotary piece is arranged between the second spraying piece and the baffle, and two end faces of the rotary piece respectively abut against the second spraying piece and the baffle. The utility model discloses an aspect sets up globular whirl room through the setting, can solve the poor problem of atomized particles circularity more effectively.

Description

Novel nozzle of spray dryer

Technical Field

The utility model relates to a spray dryer nozzle field, concretely relates to novel nozzle of spray dryer.

Background

Along with the development of urbanization and new rural construction, a steady growth space is provided for the building sanitary ceramics, particularly the urban and rural construction of new rural areas and the middle and western areas develops rapidly, and the demand of building ceramic products is greatly pulled.

At present, spray drying technology is widely adopted in the production of ceramic building materials, and a spray dryer is a thermal device which plays an important role in a wet powder production line and is a drying device for manufacturing dry-pressed powder by dehydrating ceramic raw materials by a physical method. Meanwhile, the social and economic development puts new requirements on the building sanitary ceramic industry, and the energy conservation and emission reduction are related to the survival and development of the building sanitary ceramic industry.

In other words, the old dryer nozzles as shown in fig. 1 have not kept up with the time requirements for optimizing and improving product quality and production efficiency, and also for reducing energy consumption.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a technical problem that an aspect was solved is the uneven problem of atomizing granule circularity and moisture content, through setting up globular whirl room, can solve the poor problem of atomizing granule circularity more effectively.

In order to achieve the above object, the utility model provides a following technical scheme:

a novel spray nozzle of a spray dryer comprises a rear seat internally provided with a hollow pipeline, a front cover provided with a nozzle, and a first spray sheet, a second spray sheet and a rotary sheet which are sequentially arranged from the nozzle to the rear seat; the rear seat is connected with the front cover; the rear end of the front cover is provided with a drainage hole, a flow deflector and a baffle plate in sequence from the nozzle direction, the flow deflector is a circular ring provided with a plurality of channels on the ring wall, and the baffle plate is fixedly arranged in the front cover and is abutted against the flow deflector; the first spraying piece and the second spraying piece are both in a similar ring shape, the first spraying piece is arranged against the second spraying piece, and a cyclone chamber with a spherical cavity can be formed between the first spraying piece and the second spraying piece; the rotary piece is arranged between the second spraying piece and the baffle, and two end faces of the rotary piece respectively abut against the second spraying piece and the baffle.

Further, the swirl chamber is ellipsoidal.

Further, the inner diameter of the flow deflector is smaller than the diameter of the drainage hole.

Further, the aperture of the drainage hole is smaller than the diameter of the rear seat hollow pipeline.

Furthermore, the flow deflector and the baffle are integrally arranged and fixed in the front cover.

Further, the outer end face of the nozzle is conical.

Further, the rotary vane is a three-channel rotary vane.

Further, the rear seat is screwed with the front cover through threads.

Further, still include the sealing washer, set up on the back seat, be located protecgulum one end.

Furthermore, the aperture of the central circular through hole of the second spray piece is larger than or equal to the aperture of the central circular through hole of the first spray piece.

The utility model has the advantages as follows:

1. the water content is uniform, and the big end and the small end of the ceramic tile cannot be caused;

2. the grain composition is reasonable and uniform, and the compactness of the ceramic tile is uniform;

3. the granule shape has high roundness, the powder molding fluidity is good, and the high-bottom reduction of the patterns of the ceramic tiles is easy;

4. simple structure, high reliability and easy maintenance.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic structural view of an old nozzle of a dryer according to the background art of the present invention;

fig. 2 is a schematic structural diagram of a novel spray nozzle of a spray dryer disclosed by an embodiment of the invention;

FIG. 3 is a schematic cross-sectional view of the cyclone chamber of the embodiment of FIG. 2;

FIG. 4 is a schematic structural diagram of a first nozzle plate in the embodiment of FIG. 2;

FIG. 5 is a schematic structural view of a second nozzle plate in the embodiment of FIG. 2;

FIG. 6 is a schematic diagram of a three-channel rotary vane structure in the embodiment of FIG. 2;

fig. 7 is a schematic view of a single-channel spinning sheet structure.

Description of reference numerals:

1. a rear seat; 2. a front cover; 3. a spout; 4. a first spray sheet;

5. a second spray sheet; 6. rotating the sheet; 7. a drainage hole; 8. a flow deflector;

9. a baffle plate; 10. a swirl chamber;

61 three-channel spiral sheet.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention and the accompanying drawings are combined together to clearly and completely describe the technical solutions in the embodiments of the present invention. It should be noted that the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The following describes embodiments of the present invention with reference to the drawings.

Examples

As shown in fig. 2, the novel nozzle of the spray dryer provided for the invention comprises a rear seat 1 with a built-in hollow pipeline, a front cover 2 with a nozzle 3, and a first spray sheet 4, a second spray sheet 5 and a rotary sheet 6 which are arranged in sequence from the nozzle 3 to the rear seat 1; the rear seat 1 is connected to the front cover 2, preferably by screwing.

Set gradually drainage hole 7, water conservancy diversion piece 8 and baffle 9 toward spout 3 direction in 1 end of protecgulum 2 back seat, water conservancy diversion piece 8 is for being equipped with the ring of a plurality of passageways on the rampart, and baffle 9 is fixed to be set up in protecgulum 2, supports in the setting of water conservancy diversion piece 8, as preferred, in this embodiment, water conservancy diversion piece 8 and baffle 9 integration set up, are fixed in protecgulum 2.

Preferably, the inner diameter of the guide vanes 8 is smaller than the diameter of the drainage holes 7.

Preferably, the diameter of the drainage hole 7 is smaller than the diameter of the hollow pipeline of the rear seat 1.

As shown in fig. 3, 4 and 5, the first spraying piece 4 and the second spraying piece 5 are both similar to a circular ring, the first spraying piece 4 is disposed against the second spraying piece 5, and a cyclone chamber 10 with a spherical cavity can be formed between the first spraying piece and the second spraying piece. As shown in figure 1, the nozzle spray channel for the traditional old nozzle spray dryer is short, the atomization stroke of slurry liquid drops is short, the atomization effect is general, the water content of powder is not uniform enough, the requirement on uniformity is low because the water content of the powder of the original glazed tile is 6.5-7.5%, and the requirement on uniformity is high because the water content of the powder of the currently produced glazed tile is 6.7-7.2%. The non-uniformity of the water content of the powder material and the easy generation of big and small heads of the ceramic tile. In order to solve the problems, the working length of the nozzle is properly lengthened, the liquid flow passes through the nozzle pipeline with the too long length, the resistance of the channel to the liquid flow can be increased, the liquid drop atomization effect is better, the diameter of the liquid drop is reduced, the size of the atomized liquid drop is more uniform, the uniformity of the moisture content of the powder is improved, the moisture is easier to evaporate, and the energy consumption is reduced. In order to better match the improved nozzle with the working matching of the rotary vane 6, the structure of the spray vane is also improved in the embodiment, so that the diameter of a single nozzle is increased, and the flow rate is improved. The improved nozzle has raised atomizing performance and swirling performance, and thus increased spray sheet diameter and flow rate, increased flow rate and output.

The rotary piece 6 is arranged between the second spraying piece 5 and the baffle 9, and two end faces respectively abut against the second spraying piece 5 and the baffle 9.

Preferably, in the present embodiment, the outer end surface of the spout 3 is conical surface-shaped.

As shown in fig. 6, in the preferred embodiment, there is a three-channel convolute 616.

As shown in fig. 7, the single-channel rotary vane 6 adopted by most of the sprayer nozzles in China at present is weak in rotational flow capacity of the single-channel rotary vane 6, so that the rotation time of mist drops in hot air is not so long, particles for preheating and explosion of the mist drops are not uniform enough, the percentage of particles of 40 meshes to 80 meshes cannot meet the product quality requirement, the percentage of particles of 20 meshes to 40 meshes is high, and a large amount of fine powder of 80 meshes to 100 meshes is generated. These high percentages of fines severely affect the quality of the fired micro-powder bricks. In consideration of the problems of the single rotary vane 6, the structure of the single rotary vane is improved into the three rotary vanes 6, the structure can ensure that the spraying rotation effect of the slurry is good, the rotating floating time of the vaporific slurry in the spraying tower is longer, the heating is uniform, the granulation forming is better, the particle size is more than 80 percent from 40 meshes to 80 meshes, the fine powder of more than 80 meshes is greatly reduced, and the product quality is greatly improved.

In order to ensure the sealing performance, the nozzle in this embodiment further includes a sealing ring, which is disposed on the rear seat 1 and located at one end of the front cover 2.

As another variation of this embodiment, the swirl chamber 10 is ellipsoidal.

The utility model adopts the design of Bernoulli principle, and the atomizer is made by utilizing the principle of large flow velocity and small pressure intensity. Air flows out from the small hole rapidly, the pressure near the small hole is small, the air pressure on the liquid surface in the container is strong, the liquid rises along the thin tube below the small hole, and after the liquid flows out from the upper opening of the thin tube, the impact of the air flow is sprayed into mist. When silt moves, because the flow of water flows, the flow velocities of the top and the bottom of silt particles are different, the former is the movement velocity of water flow, and the latter is the flow velocity of water permeating among particles, which is much smaller than the velocity of water flow. The resulting pressure differential produces a lifting force.

The sprayer adopting the novel nozzle is very quick in drying process and can be finished within a few seconds; the temperature of liquid drops is not high in the drying process, and the product quality is good; the process of the product is simplified after spray drying; during spray drying, the drying conditions can be adjusted and changed to adjust the quality indexes of the product (such as the bulk density, the particle size and the like of powder); the product has good dispersibility, fluidity and solubility. Because the drying process is completely finished in the air, the product can basically keep a hollow spherical shape or loose powder shape similar to liquid drops, and has good dispersibility; the sealing and negative pressure ensure the sanitary condition of production.

Principle of operation

When the spray dryer works, slurry with the water content of about 35% is firstly pumped into a nozzle arranged on the spray dryer through a high-pressure plunger pump, the slurry is sprayed out through a small hole of the nozzle to form rotary fog-shaped tiny liquid drops, the liquid drops move to the top from the middle lower part of a cylinder body of the spray dryer and move in the reverse direction with hot air flowing from the top to the bottom, the liquid drops are rapidly dried and exploded in a very short time to form a hollow mud mass particle product with the water content of 6-7%, and a small amount of very dry micro powder particles are generated. After large particles are removed by screening, the raw materials are pressed into brick blanks by a large-tonnage press, the surfaces of the glaze lines are decorated, and the brick blanks are fired into wall and floor tiles with various patterns on the market.

The above embodiments only represent one embodiment of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A novel spray nozzle of a spray dryer comprises a rear seat internally provided with a hollow pipeline, a front cover provided with a nozzle, and a first spray sheet, a second spray sheet and a rotary sheet which are sequentially arranged from the nozzle to the rear seat; the utility model is characterized in that the rear seat is connected with the front cover;

the rear end of the front cover is provided with a drainage hole, a flow deflector and a baffle plate in sequence from the nozzle direction, the flow deflector is a circular ring provided with a plurality of channels on the ring wall, and the baffle plate is fixedly arranged in the front cover and is abutted against the flow deflector;

the first spraying piece and the second spraying piece are both in a similar ring shape, the first spraying piece is arranged against the second spraying piece, and a cyclone chamber with a spherical cavity can be formed between the first spraying piece and the second spraying piece;

the rotary piece is arranged between the second spraying piece and the baffle, and two end faces of the rotary piece respectively abut against the second spraying piece and the baffle.

2. The spray dryer nozzle of claim 1, wherein said swirl chamber is ellipsoidal.

3. The spray dryer new nozzle of claim 2, wherein said deflector has an inner diameter less than said drainage hole diameter.

4. The spray dryer new nozzle of claim 3, wherein the bore diameter of said drainage holes is smaller than the diameter of said rear seat hollow conduit.

5. The spray dryer new nozzle of any one of claims 1, 2, 3 or 4, wherein said deflector is integral with said baffle and is fixed within said front cover.

6. The spray dryer new nozzle as claimed in claim 5, wherein the outer end surface of said spout is conical.

7. The spray dryer new nozzle of claim 6, wherein said flight is a three-channel flight.

8. The spray dryer nozzle of claim 7, wherein said rear seat is threadably connected to said front cover.

9. The spray dryer nozzle of claim 8, further comprising a seal ring disposed on said rear seat at an end of said front cover.

10. The spray dryer new nozzle according to any one of claims 1-4 and 6-9, characterized in that the diameter of the central circular through hole of the second spray piece is greater than or equal to the diameter of the central circular through hole of the first spray piece.