CN211912760U

CN211912760U - Adjusting device for amount ratio of coarse powder to fine powder of white carbon black spray-dried product

Info

Publication number: CN211912760U
Application number: CN202020276591.6U
Authority: CN
Inventors: 曾志恩; 黄永生; 李陈楚; 温秋镇; 檀东宇
Original assignee: FUJIAN ZHENGSHENG INORGANIC MATERIAL CO LTD
Current assignee: FUJIAN ZHENGSHENG INORGANIC MATERIAL CO LTD
Priority date: 2020-03-09
Filing date: 2020-03-09
Publication date: 2020-11-13
Anticipated expiration: 2030-03-09

Abstract

The utility model discloses a white carbon black spray drying product coarse powder and fine powder volume ratio adjusting device, which comprises a fluidized bed, a drying tower, a spray feeding pipe, a hot air pipe, a big bag-type dust remover, a bidirectional conveying screw, a new discharging pipe, a coarse powder discharging port, a powder returning pipe, a discharging pipe, a high-level stock bin and a tail gas fan; the bottom outlet of the drying tower is connected with an inlet pipeline of the fluidized bed, the middle upper part of the drying tower is connected with a spray feeding pipe, the top part of the drying tower is connected with a hot air pipe, and a hot air outlet of the drying tower is connected with an inlet pipeline of a large bag-type dust collector; one end of the conveying screw is connected with the discharge pipe to a high-level bin with a tail gas fan, and the other end of the conveying screw is connected with a new discharge pipe to the coarse powder fluidized bed; the upper part of the fluidized bed is additionally provided with a negative pressure powder-returning pipe, so that the fine powder in the fluidized bed is conveyed back to the high-level bin, thereby forming a new material circulation. The utility model discloses can improve middlings product output when promoting white carbon black farine product particle diameter quality, satisfy the customer and to the different requirements of supplying goods finished product particle diameter size and supply quantity of goods.

Description

Adjusting device for amount ratio of coarse powder to fine powder of white carbon black spray-dried product

Technical Field

The utility model relates to an inorganic chemical product white carbon black apparatus for producing, concretely relates to white carbon black spray drying product thick, fine powder volume ratio adjusting device.

Background

The precipitated white carbon black is a fine new material with wide application, and is mainly used in the fields of rubber, silicon rubber, plastics, coating, printing ink, pesticides, papermaking, food, medicine, feed and the like. The production flow of the white carbon black by the precipitation method comprises the following steps: precipitation reaction of water glass and concentrated sulfuric acid, aging, filter pressing, washing, pulping and spray drying. In the prior art, spray drying generally adopts a plurality of spray guns which are uniformly distributed around a drying tower to spray feed liquid, hot air entering from the upper part of the tower carries dried fine-particle white carbon black products to pass through a bag-type dust remover behind the tower, air enters an induced draft fan to be evacuated, and white carbon black finished products removed by the bag-type dust remover behind the tower are conveyed into a fine powder bin by a conveying screw to wait for packaging; and the coarse-grained white carbon black finished product falls into a fluidized bed at the bottom of the tower, is dried for the second time, and then enters a coarse powder bin through a lifting machine to wait for packaging. There are problems in that: on one hand, the white carbon black particles fed into the fine powder bin still contain partial coarse powder products, so that the quality of fine powder finished products is influenced, and meanwhile, the yield of the coarse powder is also reduced; on the other hand, the existing equipment and process have irreversibility, can not carry out secondary screening, and can not meet the requirements of customers on different particle sizes and supply quantities of supplied finished products.

Disclosure of Invention

The utility model aims at providing a simple structure, preparation and maintenance cost are low, convenient to use efficient white carbon black spray drying product is thick, the thin powder volume is than adjusting device, improves middlings product output when promoting white carbon black fine powder product particle diameter quality, satisfies the customer to the different requirements of supplying material finished product particle diameter size and supply quantity.

In order to realize the purpose, the device for adjusting the ratio of the coarse powder to the fine powder of the white carbon black spray-dried product comprises a fluidized bed, a drying tower, a spray feeding pipe, a hot air pipe, a large bag-type dust remover, a conveying screw, a new discharging pipe, a coarse powder discharging port, a powder returning pipe, a discharging pipe, a high-level stock bin and a tail gas fan; the bottom outlet of the drying tower is connected with an inlet pipeline of the fluidized bed, the middle upper part of the drying tower is connected with a spray feeding pipe, the top part of the drying tower is connected with a hot air pipe, and a hot air outlet of the drying tower is connected with an inlet pipeline of a large bag-type dust collector; the conveying screw is a bidirectional conveying screw, one end of the conveying screw is connected with the discharge pipe to a high-level bin with a tail gas fan, and the other end of the conveying screw is connected with a new discharge pipe and connected into the coarse powder fluidized bed; and a negative pressure powder pumping return pipe is additionally arranged at the upper part of the fluidized bed, so that the fine powder in the fluidized bed is conveyed back to the high-level bin, and a new material circulation is formed.

The adjusting device for the ratio of the coarse powder to the fine powder of the white carbon black spray-dried product with the structure changes a unidirectional conveying screw into bidirectional conveying, and a powder feeding pipe is additionally arranged at the other end of the screw and is connected into a coarse powder fluidized bed. The spiral conveying direction can be changed as required, and the materials sent into the fine powder bin are conveyed to the fluidized bed from the newly-added powder discharging pipe in a changed direction; a negative pressure pumping pipeline is additionally arranged at the upper part of the fluidized bed, and the fine powder in the fluidized bed is conveyed back to the fine powder bin, so that a new material circulation is formed; the quantity proportion of the coarse powder and the fine powder is adjusted at any time by controlling the conveying spiral direction and the opening and closing of related valves.

The utility model discloses white carbon black spray drying product thick, the thin powder volume is than adjusting device on keeping original process flow basis, newly-increased a process line, has following technical characterstic and beneficial effect:

1. through changing unidirectional transport screw into bidirectional transport, the other end of the screw is added with a discharge pipe which is connected into a coarse powder fluidized bed and is fluidized and separated with coarse powder falling in a drying tower, and meanwhile, a powder return pipe is additionally arranged, so that the problem that the proportion of coarse powder and fine powder output in a drying section in the prior art cannot be adjusted is solved, the particle size quality and the coarse powder output of fine powder products are improved, and different requirements of customers on the particle size of supplied finished products and the supply quantity are met.

2. The utility model discloses simple structure, preparation and maintenance cost are low, and convenient to use is high-efficient.

Drawings

FIG. 1 is the schematic structural diagram of the adjusting device for the ratio of the coarse powder to the fine powder of the spray-dried white carbon black product.

Reference numerals: the device comprises a fluidized bed 1, a drying tower 2, a spray feeding pipe 3, a hot air pipe 4, a large bag-type dust remover 5, a bidirectional conveying screw 6, a new discharging pipe 7, a coarse powder discharging port 8, a powder returning pipe 9, a discharging pipe 10, a high-level bin 11 and a tail gas fan 12.

Detailed Description

The device for adjusting the amount ratio of coarse powder to fine powder of the spray-dried white carbon black product of the present invention is further described in detail with reference to the following embodiments.

As shown in fig. 1, the device for adjusting the ratio of the amount of coarse powder to the amount of fine powder in the spray-dried white carbon black product of the present invention comprises a fluidized bed 1, a drying tower 2, a spray feeding pipe 3, a hot air pipe 4, a large bag-type dust collector 5, a conveying screw 6, a new discharging pipe 7, a coarse powder discharging port 8, a powder returning pipe 9, a discharging pipe 10, a high-level bin 11 and a tail gas fan 12; the bottom outlet of the drying tower 2 is connected with an inlet pipeline of the fluidized bed 1, the middle upper part of the drying tower 2 is connected with a spray feeding pipe 3, the top part of the drying tower 2 is connected with a hot air pipe 4, and a hot air outlet of the drying tower 2 is connected with an inlet pipeline of a large bag-type dust collector 5; the conveying screw 6 is a bidirectional conveying screw; one end of the conveying screw is connected with a discharge pipe 10 to a high-level bin 11 with a tail gas fan 12, the other end of the conveying screw is connected with a new discharge pipe 7 and connected into the coarse powder fluidized bed 1, and a negative pressure powder pumping return pipe 9 is additionally arranged at the upper part of the fluidized bed 1 so as to convey fine powder in the fluidized bed 1 back to the high-level bin 11, so that a new material circulation is formed.

When the device for adjusting the ratio of the coarse powder to the fine powder of the white carbon black spray-dried product with the structure works, slurry enters the drying tower 2 from the spray feeding pipe 3 and is dried by the hot air pipe 4, fine powder and part of coarse powder enter the large bag-type dust collector 5 along with tail gas, and a white carbon black finished product falls into the bidirectional spiral 6 and enters the high-level bin 11 through the discharging pipe 10; when the quantity ratio of the coarse powder to the fine powder needs to be adjusted, the bidirectional screw 6 is operated in a reversing mode, the finished product falls into a new discharge pipe 7 and then enters the fluidized bed 1, the finished product and the coarse powder falling into the drying tower 2 are fluidized and sorted together, the fine powder after fluidized and sorting is conveyed to a high-level bin 11 through a powder return pipe 9 on the upper portion of the fluidized bed 1, and the coarse powder is discharged to a coarse powder bin through a discharging pipe 8 and packaged.

Claims

1. A device for adjusting the quantity ratio of coarse powder to fine powder of a white carbon black spray-dried product comprises a fluidized bed, a drying tower, a spray feeding pipe, a hot air pipe, a large bag-type dust remover, a conveying screw, a coarse powder discharging port, a discharging pipe, a high-level bin and a tail gas fan; the bottom outlet of the drying tower is connected with an inlet pipeline of the fluidized bed, the middle upper part of the drying tower is connected with a spray feeding pipe, the top part of the drying tower is connected with a hot air pipe, and a hot air outlet of the drying tower is connected with an inlet pipeline of a large bag-type dust collector; the method is characterized in that: it also comprises a new discharge pipe and a powder return pipe; the conveying screw is a bidirectional conveying screw, one end of the conveying screw is connected with the discharge pipe to a high-level bin with a tail gas fan, and the other end of the conveying screw is connected with a new discharge pipe and connected into the coarse powder fluidized bed; and a negative pressure powder pumping return pipe is additionally arranged at the upper part of the fluidized bed, so that the fine powder in the fluidized bed is conveyed back to the high-level bin, and a new material circulation is formed.