CN210636008U

CN210636008U - Mixing device of coal injection for blast furnace

Info

Publication number: CN210636008U
Application number: CN201921215989.2U
Authority: CN
Inventors: 于辉; 杨海西; 刘元霞; 马建军
Original assignee: Jingye Steel Co Ltd
Current assignee: Jingye Steel Co Ltd
Priority date: 2019-07-30
Filing date: 2019-07-30
Publication date: 2020-05-29
Anticipated expiration: 2029-07-30

Abstract

The utility model relates to the technical field of blast furnace coal injection, in particular to a mixing device for blast furnace coal injection, which solves the defect of insufficient stirring of the stirring device in the prior art, and comprises a mixing tank and a feed hopper, wherein the upper part of the mixing tank is provided with a driving motor, the output shaft of the driving motor is fixedly connected with a stirring shaft which is matched with the mixing tank in a rotating way, a plurality of stirring turbine discs are arranged on the stirring shaft from top to bottom, the bottom of the mixing tank is provided with a blanking pipe, the bottom of the blanking pipe is hinged with a blanking baffle, the free end of the blanking baffle is connected with the blanking pipe through a lock catch, the bottom of the mixing tank is communicated with a plurality of blast pipes, one side of the top of the mixing tank is fixedly connected with a feed hopper bracket, the feed hopper is hinged with the feed hopper bracket, when the turbine blades stir coal powder, the blast pipes supply air, the mixing is more uniform, the fan can be prevented from being damaged by the powder particles in a reverse flow mode.

Description

Mixing device of coal injection for blast furnace

Technical Field

The utility model relates to a blast furnace coal injection technical field especially relates to a compounding device of coal injection for blast furnace.

Background

The blast furnace coal injection auxiliary fuel is a new technology widely adopted in modern blast furnace iron-making production, can simultaneously benefit from two aspects of coke saving and yield increase, and has two modes of an indirect injection mode and a direct injection mode in a blast furnace coal injection process from the configuration of coal powder preparation and injection facilities. In the indirect jetting technology, a coal pulverizing system and a jetting system are separated, pulverized coal is sent to a jetting station close to a blast furnace from a coal pulverizing workshop through a tank car or a pneumatic conveying pipeline, the pulverized coal is jetted to the blast furnace again, in a separation workshop, feeding enables the pulverized coal to be fully combusted, combustion improver needs to be mixed in the pulverized coal, at present, a special mixing device for the pulverized coal does not exist, the pulverized coal can only be mixed by using a common mixer, stirring is not sufficient, not only the pulverized coal is easy to combust incompletely, but also local deflagration of the pulverized coal is easily caused.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the problem of insufficient stirring of the stirring device in the prior art and providing a mixing device for coal injection for blast furnaces.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a compounding device of coal injection for blast furnace, includes compounding jar and feeder hopper, driving motor is installed on the upper portion of compounding jar, and driving motor's output shaft fixedly connected with and compounding jar normal running fit's (mixing) shaft, and top-down is provided with a plurality of stirring turbine dishes on the (mixing) shaft, the bottom of compounding jar is provided with the unloading pipe, and the bottom of unloading pipe articulates there is the unloading baffle, and the free end and the unloading pipe of unloading baffle pass through the hasp and connect, the bottom intercommunication of compounding jar has many blast pipes, top one side fixedly connected with feeder hopper support of compounding jar, the feeder hopper is articulated with feeder hopper support, the top of compounding jar be seted up with feeder hopper assorted intercommunicating pore.

Preferably, the stirring shaft is connected with the side wall of the mixing tank through a sealing bearing.

Preferably, the turbine disk is composed of a plurality of circumferentially spaced turbine blades.

Preferably, a sealing gasket is arranged between the blanking baffle and the blanking pipe.

Preferably, the blast pipe is provided with an inverted U-shaped dust isolating part, and the upstream section of the dust isolating part is provided with a one-way valve.

Preferably, the downside of intercommunicating pore is provided with the returning face plate that one end and compounding jar rotate to be connected, and the free end and the compounding jar of returning face plate pass through spring coupling, and the upper portion of returning face plate is inlayed and is had the porous sieve board that runs through the returning face plate.

The utility model has the advantages that:

1. the utility model discloses the blast pipe has been add in the bottom of compounding device, when the turbine piece stirs the buggy, the blast pipe air supply promotes the motion of likepowder granule, and granule and turbine piece are to the collision, mix more evenly.

2. The utility model discloses a set up the ash separating portion of the shape of falling U on the blast pipe, can prevent that likepowder granule from haring the fan against the current.

Drawings

FIG. 1 is a schematic structural view of a mixing device for coal injection for blast furnaces according to the present invention;

FIG. 2 is a schematic top view of a mixing device for coal injection for blast furnaces according to the present invention;

fig. 3 is an enlarged schematic structural diagram of a point a in fig. 1 of a mixing device for coal injection for a blast furnace according to the present invention.

In the figure: 1 mixing tank, 2 driving motors, 3 stirring shafts, 4 turbine blades, 5 blanking pipes, 6 blanking baffles, 7 blast pipes, 8 feed hopper supports, 9 feed hoppers, 10 communicating holes, 11 turnover plates, 12 porous sieve plates and 13 springs.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Referring to fig. 1-3, a mixing device of coal injection for blast furnace comprises a mixing tank 1 and a feed hopper 9, a driving motor 2 is arranged on the upper part of the mixing tank 1, and the output shaft key of the driving motor 2 is connected with a stirring shaft 3 which is rotationally matched with the material mixing tank 1, a plurality of stirring turbine discs are arranged on the stirring shaft 3 from top to bottom, the bottom of the material mixing tank 1 is communicated with a blanking pipe 5, and the bottom of unloading pipe 5 articulates there is unloading baffle 6, the free end of unloading baffle 6 passes through the hasp with unloading pipe 5 to be connected, the bottom circumference interval of compounding jar 1 is provided with many blast pipes 7 with 1 intercommunication of compounding jar, blast pipe 7 converges into an air supply house steward, air supply house steward is connected with the fan, the welding of top one side of compounding jar 1 has feeder hopper support 8, feeder hopper 9 is articulated with feeder hopper support 8, feed hopper 9 assorted intercommunicating pore 10 has been seted up at the top of compounding jar 1.

Wherein the stirring shaft 3 is connected with the side wall of the mixing tank 1 through a sealing bearing, the stirring turbine disc is composed of a plurality of turbine blades 4 arranged at intervals in the circumferential direction, and a sealing gasket is arranged between the blanking baffle 6 and the blanking pipe 5.

Specifically, the blast pipe 7 is provided with an inverted U-shaped dust separation part, and the upstream section of the dust separation part is provided with a check valve, so that powdery particles are prevented from damaging the fan in a reverse flow manner, and the downstream part of the dust separation part can play a role in buffering, so that the burden of the check valve is reduced.

Further, the downside of intercommunicating pore 10 is provided with one end and 1 articulated returning face plate 11 of compounding jar, and the free end of returning face plate 11 passes through spring 13 with compounding jar 1 and is connected, and the porous sieve 12 that runs through returning face plate 11 is inlayed on the upper portion of returning face plate 11, and air accessible porous sieve 12, and likepowder granule can not pass through, can prevent that likepowder granule from outwards overflowing through intercommunicating pore 10.

Example (b): when mixing materials, the lower end of a feed hopper 9 is inserted into a communicating hole 10, the gravity of the feed hopper 9 is enough to overcome the pulling force of a spring 13, a turnover plate 11 is turned over, the feed hopper 9 is communicated with the inner cavity of a mixing tank 1, pulverized coal and combustion improver are placed into the mixing tank 1 through the feed hopper 9, after the feeding is finished, the feed hopper 9 is rotated to be separated from the mixing tank 1, the turnover plate 11 is rotated and reset under the traction of the spring 13, and a porous sieve plate 12 covers the communicating hole 10;

the fan is started, the air supply pipe 7 supplies air into the material mixing tank 1, the driving motor 2 is started by electrifying, the driving motor 2 drives the stirring shaft 3 to rotate, the turbine blades 4 stir the materials in the material mixing tank 1 in the circumferential direction and stir the materials up and down at the same time, and the powder particles move under the action of wind power and collide with the turbine blades 4 and the inner wall of the material mixing tank 1 at the same time, so that the materials can be mixed uniformly and quickly;

after the material mixing is finished, the fan and the driving motor 2 are closed, the blanking baffle 6 is opened, and the material is blanked from the blanking pipe 5.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. A mixing device of coal injection for a blast furnace, which comprises a mixing tank (1) and a feed hopper (9), it is characterized in that the upper part of the mixing tank (1) is provided with a driving motor (2), and the output shaft of the driving motor (2) is fixedly connected with a stirring shaft (3) which is rotationally matched with the mixing tank (1), a plurality of stirring turbine discs are arranged on the stirring shaft (3) from top to bottom, a discharging pipe (5) is arranged at the bottom of the mixing tank (1), the bottom of the blanking pipe (5) is hinged with a blanking baffle (6), the free end of the blanking baffle (6) is connected with the blanking pipe (5) through a lock catch, the bottom of the mixing tank (1) is communicated with a plurality of blast pipes (7), one side of the top of the mixing tank (1) is fixedly connected with a feed hopper bracket (8), feed hopper (9) are articulated with feed hopper support (8), intercommunicating pore (10) with feed hopper (9) assorted is seted up at the top of compounding jar (1).

2. The mixing device of the coal injection for the blast furnace according to claim 1, wherein the stirring shaft (3) is connected with the side wall of the mixing tank (1) through a sealed bearing.

3. The mixing device of the coal injection for the blast furnace according to claim 1, wherein the stirring turbine disk is composed of a plurality of turbine blades (4) arranged at intervals in the circumferential direction.

4. The mixing device of the coal injection for the blast furnace as claimed in claim 1, wherein a sealing gasket is arranged between the blanking baffle plate (6) and the blanking pipe (5).

5. The mixing device of coal injection for blast furnaces as claimed in claim 1, wherein the blast pipe (7) is provided with an inverted U-shaped ash-blocking portion, and the upstream section of the ash-blocking portion is provided with a check valve.

6. The mixing device of the coal injection for the blast furnace according to the claim 1, characterized in that the lower side of the communicating hole (10) is provided with a turnover plate (11) with one end rotatably connected with the mixing tank (1), the free end of the turnover plate (11) is connected with the mixing tank (1) through a spring (13), and the upper part of the turnover plate (11) is embedded with a porous sieve plate (12) penetrating through the turnover plate (11).