CN219301239U

CN219301239U - Pulverized coal preparation device

Info

Publication number: CN219301239U
Application number: CN202320243721.XU
Authority: CN
Inventors: 李秀红; 胡文国
Original assignee: Changning Hongshi Cement Co ltd
Current assignee: Changning Hongshi Cement Co ltd
Priority date: 2023-02-17
Filing date: 2023-02-17
Publication date: 2023-07-04
Anticipated expiration: 2033-02-17

Abstract

The utility model provides a coal dust preparation device relates to coal dust preparation technical field, including coal pulverizer, selection powder machine and drying cabinet, the drying cabinet is connected with the air-blower, be equipped with conveying mechanism in the drying cabinet, conveying mechanism's material loading end is located the below of the feed inlet of drying cabinet, conveying mechanism's unloading end extends to the discharge gate department of drying cabinet, the raw materials get into selection powder machine after the coal pulverizer grinds and divide into coarse powder and fine powder, the coarse powder falls into the drying cabinet and dries, the coarse powder after the drying continues to get into the coal pulverizer and grinds, repeat above action, make coal dust particle diameter and moisture reach blast furnace injection system's requirement, steerable conveying mechanism's conveying speed, and then control coarse powder dry time in the drying cabinet, and then better to dry the coarse powder, prevent that too much in the coarse powder from leading to the buggy agglomeration after the repetition grinding, reduce the number of times of repeatedly grinding buggy, improve coal dust production efficiency.

Description

Pulverized coal preparation device

Technical Field

The application relates to the technical field of coal dust preparation, in particular to a coal dust preparation device.

Background

The preparation of the pulverized coal refers to a technological process that raw coal is processed into the pulverized coal with granularity and moisture content meeting the requirements of blast furnace coal injection, and the requirements of a blast furnace injection system on the pulverized coal are as follows: the particle size is less than 74 μm and accounts for more than 80%, and the water content is not more than 1%.

However, in the production process of coal powder, the pulverized coal particles are easy to agglomerate due to high water content of raw materials, the particle size and the water content are difficult to meet the requirements of a blast furnace injection system on the coal powder, the coal powder with the particle size which is not matched with the particle size needs to be repeatedly ground, and the water content still causes the repeatedly ground coal powder to agglomerate. The common treatment mode is that a drying box is arranged between the coal mill and the powder selecting machine and used for drying the coal powder, so that the moisture in the coal powder is reduced to prevent the coal powder from agglomerating, and the conventional drying box is uneven in blowing and low in drying efficiency, so that the production efficiency of the coal powder is low.

Disclosure of Invention

An object of the embodiment of the application is to provide a pulverized coal preparation device, which can solve the technical problem proposed by the background technology.

The embodiment of the application provides a coal dust preparation device, which comprises a coal mill;

the powder selecting machine is provided with a coarse material outlet and a fine material outlet;

the feeding port of the drying box is connected with the coarse material outlet of the powder concentrator, and the discharging port of the drying box is connected with the feeding port of the coal mill;

the drying box is internally provided with a conveying mechanism, the feeding end of the conveying mechanism is located below the feeding port of the drying box, the discharging end of the conveying mechanism extends to the discharging port of the drying box, the drying box is connected with a blower, the blower is located at the top of the drying box and is connected with a blowing pipe, the blowing pipe is connected with a fan housing, the fan housing is located above the conveying mechanism, and an air distribution plate is arranged in the fan housing.

Further, conveying mechanism includes support frame, conveyer belt, initiative roller bearing, driven roller bearing and motor, the support frame level is installed on the inner wall of drying cabinet, initiative roller bearing with driven roller bearing is all installed on the support frame, pass through during the initiative roller bearing rotates the conveyer belt drives driven roller bearing is rotatory, initiative roller bearing extends to outside the drying cabinet, the motor is installed outside the drying cabinet, the motor with initiative roller bearing is connected.

Further, an air outlet is arranged on the drying box, and a bag filter is connected to the air outlet.

Further, a scraping plate is arranged in the drying box and is positioned between the conveying belt and the fan housing.

Further, the distance between the scraper and the conveyor belt is 3cm.

Further, a scraping rod is arranged at the bottom of one end, close to the discharge port of the drying box, of the conveying belt.

The utility model has the beneficial effects that:

according to the utility model, the feed inlet of the powder concentrator is connected with the discharge outlet of the coal mill, raw materials enter the powder concentrator for powder concentration after being ground by the coal mill, the powder concentrator is provided with a coarse material outlet and a fine material outlet, the feed inlet of the drying box is connected with the coarse material outlet of the powder concentrator, the ground raw materials are separated into coarse powder and fine powder by the powder concentrator, the coarse powder falls into the drying box for drying, the discharge outlet of the drying box is connected with the feed inlet of the coal mill, the dried coarse powder continuously enters the coal mill for grinding, the above actions are repeated, the particle size and moisture of the pulverized coal reach the requirements of a blast furnace blowing system, wherein a conveying mechanism is arranged in the drying box, the feed end of the conveying mechanism is positioned below the feed inlet of the drying box, the feed end of the conveying mechanism extends to the discharge outlet of the drying box, the pulverized coal is conveyed on the conveying mechanism, the conveying speed of the conveying mechanism can be controlled, the drying time of the coarse powder in the drying box is controlled, the drying box is further better dried, the drying box is connected with a blower, the blower is positioned at the top of the drying box, the blower is connected with a blast pipe, the blower is connected with a blower cover, the blower cover is positioned above the conveying mechanism, the blower cover is positioned above the conveying mechanism, and the blower cover is arranged in the blowing mechanism, and the blowing fan is arranged in the air blowing mechanism, and the blowing fan is uniformly through the blower fan, and the blower fan into the drying mechanism, and the blowing efficiency is arranged in the blowing mechanism, and the blowing fan into the blowing mechanism.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered limiting the scope, and that other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic diagram of the structure of FIG. 1 3;

FIG. 3 is a cross-sectional view of FIG. 2;

fig. 4 is a left side view of fig. 2.

The reference numerals are respectively:

1. a coal mill; 2. a powder selecting machine; 3. a drying box; 4. a blower; 5. a conveying mechanism; 51. a support frame; 52. a conveyor belt; 53. a driving roller; 54. a driven roller; 55. a motor; 6. an air outlet; 7. a bag filter; 8. a blowing pipe; 9. a fan housing; 10. a wind distribution plate; 11. a scraper; 12. a scraping rod.

Detailed Description

For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, which are generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, as provided in the accompanying drawings, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present application, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships that are conventionally put in use of the product of the application, are merely for convenience of description of the present application and simplification of description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be configured and operated in a specific direction, and therefore should not be construed as limiting the present application. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal," "vertical," "overhang," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present application, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.

The following are specific examples of the present application:

the application provides a coal dust preparation device, which comprises a coal mill 1;

the powder selecting machine 2, wherein a feed inlet of the powder selecting machine 2 is connected with a discharge outlet of the coal mill 1 through a chain conveyor, the powder selecting machine 2 is provided with a coarse material outlet and a fine material outlet, and raw materials are ground by the coal mill 1 and enter the powder selecting machine 2 for powder selecting;

the feeding port of the drying box 3 is connected with the coarse material outlet of the powder concentrator 2, the ground raw materials are divided into coarse powder and fine powder by the powder concentrator 2, the coarse powder falls into the drying box 3 for drying, the discharging port of the drying box 3 is connected with the feeding port of the coal mill 1, and the dried coarse powder continuously enters the coal mill 1 for grinding, and the actions are repeated to ensure that the particle size and the moisture of the pulverized coal meet the requirements of a blast furnace injection system;

wherein be equipped with conveying mechanism 5 in the drying cabinet 3, the material loading end of conveying mechanism 5 is located the below of the feed inlet of drying cabinet 3, the unloading end of conveying mechanism 5 extends to the discharge gate department of drying cabinet 3, the buggy carries on conveying mechanism 5, the transport speed of steerable conveying mechanism 5, and then the dry time of control middlings in drying cabinet 3, and then better dry the middlings, drying cabinet 3 is connected with air-blower 4, air-blower 4 is located the top of drying cabinet 3, air-blower 4 is connected with blowpipe 8, blowpipe 8 is connected with fan housing 9, fan housing 9 is located the top of conveyer belt 52, install grid plate 10 in the fan housing 9, air-blower 4 blows into hot-blast through blowpipe 8 and fan housing 9 in drying cabinet 3, grid plate 10 in its fan housing 9 makes the hot-blast energy evenly blow to conveyer belt 52, and then make the middlings that are located on conveyer belt 52 can receive even hot-blast, make the middlings evenly air-dried, and further improve drying efficiency, and further improve buggy production efficiency.

The conveying mechanism 5 comprises a supporting frame 51, a conveying belt 52, a driving roller 53, a driven roller 54 and a motor 55, the supporting frame 51 is horizontally arranged on the inner wall of the drying oven 3, the driving roller 53 and the driven roller 54 are both arranged on the supporting frame 51, the driven roller 54 is driven to rotate through the conveying belt 52 when the driving roller 53 rotates, the driving roller 53 extends out of the drying oven 3, the motor 55 is arranged out of the drying oven 3, the motor 55 is connected with the driving roller 53, the motor 55 drives the driving roller 53 to rotate, the conveying belt 52 is enabled to rotate, the conveying belt 52 drives the driven roller 54 to rotate, coarse powder falls on the conveying belt 52 to be conveyed, the motor 55 drives the driving roller 53 to drive the driven roller 54 to rotate through the conveying belt 52, the number of the motor 55 is saved under the condition that the rotation requirement is met, and the cost is saved.

The drying cabinet 3 is provided with the air outlet 6, the air outlet 6 is connected with the bag filter 7, the air outlet 6 is used for discharging air blown by the air blower 4, so that air in the drying cabinet 3 is exchanged, an exhaust fan can be arranged at the air outlet 6 to accelerate the air flow in the drying cabinet 3, and the belt filter can filter the air passing through the air outlet 6 to prevent dust in the air from being directly discharged from the air outlet 6 to cause environmental pollution.

Be equipped with scraper blade 11 in the drying cabinet 3, scraper blade 11 is located between conveyer belt 52 and the fan housing 9, scrapes the coarse fodder that is located on the conveyer belt 52 through scraper blade 11 and levels, increases the air-dry area of coarse fodder, further improves air-dry efficiency.

The distance between the scraping plate 11 and the conveying belt 52 is 3cm, coarse materials on the conveying belt 52 are kept to be 3cm thick after passing through the scraping plate 11 for air drying, the air drying efficiency is further improved, and the production efficiency of coal dust is further improved.

The bottom of the end of the conveyer belt 52, which is close to the discharge port of the drying box 3, is provided with the scraping rod 12, and the pulverized coal adhered to the conveyer belt 52 is scraped by the scraping rod 12, so that the pulverized coal adhered to the conveyer belt 52 is prevented from falling below the conveyer belt 52 along with the rotation of the conveyer belt 52, waste is caused, and the cleaning cost is increased.

The foregoing is merely a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and variations may be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. The utility model provides a buggy preparation facilities which characterized in that: comprises a coal mill;

2. A pulverized coal producing unit as claimed in claim 1, wherein: the conveying mechanism comprises a supporting frame, a conveying belt, a driving roller, a driven roller and a motor, wherein the supporting frame is horizontally arranged on the inner wall of the drying oven, the driving roller and the driven roller are all arranged on the supporting frame, the driving roller is driven by the conveying belt to rotate when rotating, the driving roller extends out of the drying oven, the motor is arranged outside the drying oven, and the motor is connected with the driving roller.

3. A pulverized coal producing unit as claimed in claim 2, wherein: an air outlet is arranged on the drying box, and a bag filter is connected to the air outlet.

4. A pulverized coal preparing unit as claimed in claim 3, wherein: the drying box is internally provided with a scraping plate, and the scraping plate is positioned between the conveying belt and the fan housing.

5. The pulverized coal producing unit as claimed in claim 4, wherein: the distance between the scraper and the conveying belt is 3cm.

6. The pulverized coal producing unit as claimed in claim 5, wherein: the bottom of the end, close to the discharge port of the drying box, of the conveying belt is provided with a scraping rod.