CN217083289U - Bottom-blowing smelting furnace pulverized coal injection system - Google Patents

Abstract

The utility model relates to a field of smelting furnace especially relates to a bottom blowing smelting furnace fine coal injection system, and it includes the blending tank, is used for carrying the first pipeline of oxygen-enriched air, is used for to carrying the material feeding unit of fine coal and the second pipeline that communicates with the smelting furnace in the first pipeline, first pipeline and second pipeline all communicate with the blending tank. The utility model provides a fine coal and the oxygen boosting air misce bene that make the entering smelting furnace to make the abundant effect of fuel reaction.

Description

Bottom-blowing smelting furnace pulverized coal injection system

Technical Field

The invention relates to the field of smelting furnaces, in particular to a pulverized coal injection system of a bottom blowing smelting furnace.

Background

The smelting furnace is a device for melting waste metals, necessary components are added into the waste metals, and the waste metals are smelted into required alloys through operations of slagging-off, refining and the like. The smelting furnace can be used for treating solid wastes such as waste steel, waste nonferrous metal, waste gas electronic products and the like, the solid wastes contain toxic and harmful substances such as lead, mercury, cadmium and the like, the direct emission has great harm to the environment, and the smelting furnace also contains metals such as gold, silver, platinum and the like, can be recycled through the smelting furnace, and is environment-friendly.

In the related art, smelting furnaces are divided into a vertical smelting furnace and a horizontal smelting furnace, and when solid waste is smelted in the horizontal smelting furnace, oxygen-enriched air and pulverized coal are generally injected into a furnace chamber of the smelting furnace at a high speed from a position near the bottom of the horizontal smelting furnace by using a spray gun, and the oxygen-enriched air and the pulverized coal are used as fuels for reaction.

In view of the above-mentioned related art, the inventor believes that there is a defect that the pulverized coal and the oxygen-enriched air have uneven concentrations, so that the fuel reaction is insufficient, and the reaction effect is affected.

SUMMERY OF THE UTILITY MODEL

In order to make the fine coal and the oxygen-enriched air misce bene that get into the smelting furnace, this application provides a bottom-blowing smelting furnace fine coal injection system.

The application provides a bottom-blowing smelting furnace fine coal injection system adopts following technical scheme:

the utility model provides a bottom blowing smelting furnace fine coal jetting system, includes the blending tank, is used for carrying the first pipeline of oxygen-enriched air, is used for to the material feeding unit of carrying fine coal in the first pipeline and with the second pipeline of smelting furnace intercommunication, first pipeline and second pipeline all communicate with the blending tank.

Through adopting above-mentioned technical scheme, material feeding unit sends into first pipeline with fine coal in, carries fine coal to get into the hybrid tank when the oxygen-enriched air in the first pipeline flows in, and in fine coal and oxygen-enriched air got into the smelting furnace through the second pipeline after mixing in the hybrid tank to reach the purpose that makes fine coal and oxygen-enriched air get into the smelting furnace in the preceding intensive mixing, make the reaction comparatively abundant, improve the efficiency and the effect of reaction.

Preferably, a mixing device is arranged in the mixing tank, and the mixing device comprises a stirring assembly and a second driving member for driving the stirring assembly to rotate.

Through adopting above-mentioned technical scheme, second driving piece drive stirring subassembly rotates to stir the oxygen-enriched air and the fine coal in the blending tank, in order to reach the purpose that makes fine coal and oxygen-enriched air misce bene.

Preferably, the stirring assembly comprises a stirring shaft and stirring blades, the stirring blades are fixed on the stirring shaft, and the stirring shaft is rotatably connected with the mixing tank.

Through adopting above-mentioned technical scheme, when the (mixing) shaft pivoted, the epaxial stirring vane of stirring rotates to make the oxygen boosting air in the hybrid tank flow with the mist of fine coal, in order to play the purpose of stirring fine coal and oxygen boosting air.

Preferably, the height of the stirring blade is smaller than that of a position where the first pipeline is communicated with the mixing tank, and the height of the stirring blade is larger than that of a position where the second pipeline is communicated with the mixing tank.

Through adopting above-mentioned technical scheme, stirring vane is when rotating, and stirring vane top regional fine coal and oxygen-enriched air flow in stirring vane's below region to form the flow of air, be favorable to the misce bene of fine coal and oxygen-enriched air.

Preferably, material feeding unit includes hopper and the depiler valve that is used for controlling the hopper ejection of compact, the bottom of hopper is provided with the discharging pipe, discharging pipe and first pipeline intercommunication, the depiler valve is installed on the discharging pipe.

Through adopting above-mentioned technical scheme, keep in placing powdered coal in the hopper, powdered coal in the hopper is because in the reason of gravity discharges from the discharging pipe and enters into first pipeline to reach the purpose of continuous unloading, the depiler valve is used for controlling the volume of discharging pipe discharge powdered coal, is favorable to controlling the proportion of powdered coal and oxygen-enriched air.

Preferably, the distributing valve comprises a valve body, a valve shaft and a valve plate fixed on the valve shaft, the valve body is arranged on the discharge pipe, a cavity communicated with the discharge pipe is arranged in the valve body, the valve shaft and the valve plate are arranged in the cavity, the valve shaft is rotatably connected with the valve body, the number of the valve plates is at least two, and the valve plates are arranged at intervals; and the valve shaft further comprises a second driving piece for driving the valve shaft to rotate.

Through adopting above-mentioned technical scheme, second driving piece drive valve shaft rotates to make the valve plate rotate, the fine coal in the hopper drops between adjacent valve plate, and in the fine coal got into first pipeline along with the rotation of valve plate, the rotational speed of valve plate was faster, and the volume of the fine coal of input first pipeline is more, and the rotational speed of valve plate is slower, and the volume of the fine coal of input first pipeline is less, in order to reach the purpose of control fine coal load.

Preferably, the plurality of valve plates are uniformly arranged along the circumferential direction of the cross section of the valve shaft.

Through adopting above-mentioned technical scheme to make the valve plate rotate the volume of pay-off at every turn and keep unanimous, make the interval of every volume of pay-off more even, be favorable to oxygen-enriched air and fine coal misce bene.

Preferably, the valve plate sets up to the semicircle board, the valve plate is provided with arc border portion and sharp border portion, the sharp border portion and the valve shaft of valve plate are fixed, the cavity sets up to cylindrical structure, the arc border portion and the inside butt of valve body of valve plate.

Through adopting above-mentioned technical scheme to reduce the phenomenon that fine coal spills from between valve plate and the valve body lateral wall, be favorable to the maintenance even pay-off volume of feed valve.

Drawings

Fig. 1 is a schematic plan view of a bottom-blowing smelting furnace pulverized coal injection system according to an embodiment of the present application.

Fig. 2 is a sectional view showing an internal structure of a valve body in a pulverized coal injection system of a bottom-blowing smelting furnace according to an embodiment of the present application.

Fig. 3 is a sectional view showing an internal structure of a mixing tank in a pulverized coal injection system of a bottom-blowing smelting furnace according to an embodiment of the present application.

Reference numerals: 1. a feeding device; 10. a hopper; 100. a discharge pipe; 11. a material distributing valve; 110. a valve body; 111. a valve shaft; 112. a valve plate; 113. a first driving member; 114. a storage cavity; 115. a chamber; 2. a first conduit; 3. a second conduit; 4. a mixing tank; 5. a blowing member; 6. a mixing device; 60. a second driving member; 61. a stirring assembly; 610. a stirring shaft; 611. a stirring blade.

Detailed Description

The present application is described in further detail below with reference to figures 1-3.

The embodiment of the application discloses bottom-blowing smelting furnace fine coal injection system, refer to fig. 1, bottom-blowing smelting furnace fine coal injection system includes material feeding unit 1, first pipeline 2, second pipeline 3, blending tank 4 and jetting 5, and first pipeline 2 and material feeding unit 1, 4 intercommunications of blending tank are provided with fine coal in the material feeding unit 1, and 2 circulations of first pipeline have the oxygen boosting air. The blending tank 4 is communicated with one end of the second pipeline 3, the blowing piece 5 is installed at the other end of the second pipeline 3, and the blowing piece 5 is set to be a spray gun. The feeding device 1 conveys the pulverized coal into the first pipeline 2, the oxygen-enriched air circulates at a high speed in the first pipeline 2, and the oxygen-enriched air and the pulverized coal are blown into the smelting furnace through the blowing piece 5 after entering the mixing tank 4 to be fully mixed.

Referring to fig. 1, the feeding device 1 includes a hopper 10 and a material distributing valve 11, the hopper 10 is vertically disposed, a feeding port is disposed at the top of the hopper 10, a discharging pipe 100 is communicated with the bottom of the hopper 10, a first pipeline 2 is communicated with the discharging pipe 100, an axis of the first pipeline 2 is perpendicular to an axis of the discharging pipe 100, and the material distributing valve 11 is mounted on the discharging pipe 100.

Referring to fig. 2, the distributing valve 11 includes a valve body 110, a valve shaft 111, a plurality of valve plates 112 and a first driving member 113, the valve body 110 is flange-connected to the discharging pipe 100, a cavity 115 is provided in the valve body 110, the cavity 115 is cylindrical, and two ends of the cavity 115 penetrate through the valve body 110 to communicate with the discharging pipe 100. Valve shaft 111 and valve plate 112 set up in cavity 115, and valve shaft 111 rotates and sets up on valve body 110, and valve plate 112 sets up to the semicircle board, and valve plate 112 is provided with arc border portion and straight line border portion, and the straight line border portion and the welding of valve shaft 111 of valve plate 112, the arc border portion and the laminating of valve body 110 inner wall of valve plate 112. The quantity of this application valve plate 112 sets up to four, and four valve plates 112 set up along the even interval of circumferencial direction of valve shaft 111 cross section, are formed with between the adjacent valve plate 112 to be used for transporting the thing chamber 114 of putting of fine coal. The first driving member 113 is provided as a motor, the first driving member 113 is welded to the valve body 110, and a motor shaft of the first driving member 113 is coaxially fixed to the valve shaft 111.

The first driving member 113 drives the valve shaft 111 to drive the valve plate 112 to rotate, so that the pulverized coal in the hopper 10 falls into the storage cavities 114, and the valve shaft 111 rotates, so that the pulverized coal in each storage cavity 114 falls into the first pipeline 2 in sequence and is brought into the mixing tank 4 along with the flow of the oxygen-enriched air in the first pipeline 2.

Referring to fig. 3, the first pipe 2 communicates with the mixing tank 4 at a higher position than the second pipe 3 communicates with the mixing tank 4. Be provided with mixing arrangement 6 in blending tank 4, mixing arrangement 6 includes second driving piece 60 and stirring subassembly 61, and stirring subassembly 61 includes (mixing) shaft 610 and a plurality of stirring vane 611, and a plurality of stirring vane 611 are even, the interval sets up along the circumferencial direction of (mixing) shaft 610 cross section, and (mixing) shaft 610 rotates with the roof of blending tank 4 to be connected, and second driving piece 60 sets up to the motor, and the motor shaft of second driving piece 60 is coaxial fixed with (mixing) shaft 610. Wherein, the height of the stirring blade 611 is less than the height of the position where the first pipeline 2 is communicated with the mixing tank 4, and the height of the stirring blade 611 is greater than the height of the position where the second pipeline 3 is communicated with the mixing tank 4.

Oxygen-enriched air and pulverized coal enter the mixing tank 4 from the first pipeline 2, are discharged from the second pipeline 3 after being stirred in the mixing tank 4, and are injected into the smelting furnace from the injection piece 5.

The implementation principle of a bottom-blowing smelting furnace pulverized coal injection system of the embodiment of the application is as follows: in the rotation process of the valve plates 112 in the distributing valve 11, the pulverized coal in the hopper 10 falls into the object placing cavities 114 between the valve plates 112 due to gravity, along with the rotation of the valve plates 112, the pulverized coal in each object placing cavity 114 sequentially falls into the first pipeline 2 and is brought into the mixing tank 4 by the oxygen-enriched air flowing at high speed in the first pipeline 2, and after being stirred and mixed by the stirring assembly 61 in the mixing tank 4, the pulverized coal and the oxygen-enriched air are discharged through the second pipeline 3 and blown into the smelting furnace through the blowing piece 5.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (8)

1. The utility model provides a bottom blowing smelting furnace fine coal injection system which characterized in that: including blending tank (4), be used for carrying oxygen-enriched air first pipeline (2), be used for to feeding device (1) of carrying fine coal in first pipeline (2) and with second pipeline (3) of smelting furnace intercommunication, first pipeline (2) all communicate with blending tank (4) with second pipeline (3).

2. The bottom-blowing smelting furnace pulverized coal injection system according to claim 1, characterized in that: be provided with mixing arrangement (6) in blending tank (4), mixing arrangement (6) are including stirring subassembly (61) and drive stirring subassembly (61) pivoted second driving piece (60).

3. The bottom-blowing smelting furnace pulverized coal injection system according to claim 2, characterized in that: the stirring assembly (61) comprises a stirring shaft (610) and stirring blades (611), the stirring blades (611) are fixed on the stirring shaft (610), and the stirring shaft (610) is rotatably connected with the mixing tank (4).

4. The bottom-blowing smelting furnace pulverized coal injection system according to claim 3, characterized in that: the height of the stirring blade (611) is smaller than that of the position where the first pipeline (2) is communicated with the mixing tank (4), and the height of the stirring blade (611) is larger than that of the position where the second pipeline (3) is communicated with the mixing tank (4).

5. The bottom-blowing smelting furnace pulverized coal injection system according to any one of claims 1 to 4, characterized in that: material feeding unit (1) is including hopper (10) and be used for controlling branch material valve (11) of hopper (10) ejection of compact, the bottom of hopper (10) is provided with discharging pipe (100), discharging pipe (100) and first pipeline (2) intercommunication, branch material valve (11) are installed on discharging pipe (100).

6. The bottom-blowing smelting furnace pulverized coal injection system according to claim 5, characterized in that: the material distribution valve (11) comprises a valve body (110), a valve shaft (111) and a valve plate (112) fixed on the valve shaft (111), the valve body (110) is mounted on the discharge pipe (100), a cavity (115) communicated with the discharge pipe (100) is arranged in the valve body (110), the valve shaft (111) and the valve plate (112) are arranged in the cavity (115), the valve shaft (111) is rotatably connected with the valve body (110), the number of the valve plate (112) is at least two, and the valve plates (112) are arranged at intervals; the valve shaft is also provided with a second driving piece (60) for driving the valve shaft (111) to rotate.

7. The bottom-blowing smelting furnace pulverized coal injection system according to claim 6, characterized in that: the valve plates (112) are uniformly arranged along the circumferential direction of the cross section of the valve shaft (111).

8. The bottom blowing smelting furnace pulverized coal injection system according to claim 7, characterized in that: valve plate (112) set up to the semicircle board, valve plate (112) are provided with arc border portion and straight line border portion, the straight line border portion and valve shaft (111) of valve plate (112) are fixed, cavity (115) set up to cylindrical structure, the arc border portion and the inside butt of valve body (110) of valve plate (112).

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