Petroleum coke powder fuel injector for carbon roasting furnace

Abstract

The utility model discloses a petroleum coke powder fuel injector for a carbon roasting furnace. The petroleum coke powder fuel injector comprises a first mixing jet pipe, a second mixing jet pipe, a burner nozzle disc and a mixing wheel, the first mixed material jet pipe, the second mixed material jet pipe and the burner nozzle disc are sequentially communicated through a pipeline; a first fluid access pipe and a first drainage pipe are arranged on a pipe body of the first mixing jet pipe; a second drainage pipe and a mixing cavity are arranged on a pipe body of the second mixing jet pipe; the first drainage pipe is arranged on one side of the first mixing jet pipe; the second drainage pipe is arranged on one side of the second mixing jet pipe; the mixing wheel is vertically coupled in the mixing cavity; combustible gas is introduced into the first fluid access pipe; combustion-supporting gas is introduced into the first fluid access pipe; petroleum coke powder is connected into the second drainage pipe, and the combustible gas and the combustion-supporting gas are mixed to drain the petroleum coke powder into the second mixing jet pipe; the solid-gas mixture is sprayed out from a plurality of nozzles on the burner nozzle disc after being mixed in the mixing cavity, so that the aims of fully burning and saving energy are fulfilled.

Description

Technical Field

[0001] The utility model belongs to the technical field of kiln equipment, and in particular relates to a petroleum coke powder fuel injector for a carbon roasting furnace. Background Art

[0002] Carbon products are essential materials in industrial production. Carbon materials are used as anodes for roasting in the electrolytic aluminum production process. In the past, carbon roasting used heavy oil, coal gas, natural gas, etc. as fuel, which had high energy consumption and cost. In order to save energy, we use petroleum coke powder instead of the original fuel, which greatly reduces the fuel cost. However, petroleum coke powder has poor fluidity and a certain degree of viscosity, making it difficult to transport, unevenly dispersed, and unable to fully burn, affecting the roasting effect. Summary of the invention

[0003] The purpose of the present invention is to solve the above problems and provide a petroleum coke powder fuel injector for a carbon roasting furnace.

[0004] A petroleum coke powder fuel injector for a carbon roasting furnace comprises: a first mixing jet tube, a second mixing jet tube, a burner nozzle disk, and a mixing wheel; the first mixing jet tube, the second mixing jet tube and the burner nozzle disk are connected in sequence by pipelines; the first mixing jet tube body is provided with a first fluid access tube, a first drainage tube and a first air outlet; the second mixing jet tube body is provided with a second fluid access tube, a second drainage tube and a mixing chamber; the first air outlet and the second fluid access tube are flange-connected; the first drainage tube is arranged on one side of the first mixing jet tube; the second drainage tube is arranged on one side of the second mixing jet tube; the mixing wheel is vertically axially connected in the mixing chamber; the first fluid access tube is connected to the combustible gas; the first drainage tube is connected to the combustion-supporting gas; the second drainage tube is connected to the petroleum coke powder, and the solid-gas mixture is mixed in the mixing chamber and then sprayed from a plurality of nozzles on the burner nozzle disk.

[0005] The tube body of the first mixing jet tube is also provided with: a first negative pressure chamber, a first nozzle, and a first throat; a first fluid access pipe is arranged at the upper end of the first negative pressure chamber; a first throat is arranged at the lower end of the first negative pressure chamber; a first air outlet is arranged below the first throat; the first nozzle is arranged in the first negative pressure chamber, and the first fluid access pipe is connected to the first nozzle pipeline; the end of the first nozzle is arranged at the transition point between the first negative pressure chamber and the first throat; a first drainage interface is provided at one end of the first drainage tube, and a connecting thread is provided on the first drainage interface; the other end of the first drainage tube is connected to the first negative pressure chamber.

[0006] The tube body of the second mixing jet tube is also provided with: a second negative pressure chamber, a second nozzle, a second throat, and an upper axle frame; a second fluid access pipe is arranged at the upper end of the second negative pressure chamber; the second negative pressure chamber, the second throat and the mixing chamber are connected in sequence; the second nozzle is arranged in the second negative pressure chamber; the end of the second nozzle is arranged at the transition between the second negative pressure chamber and the second throat; the upper axle frame is arranged at the transition between the second throat and the mixing chamber; one end of the second drainage tube is provided with a connecting thread, and the other end of the second drainage tube is connected to the second negative pressure chamber.

[0007] An upper shaft rod through hole is arranged at the center of the upper wheel shaft frame; an axle support cone is arranged in the middle of the upper end of the burner nozzle plate, and a lower shaft hole is arranged in the middle of the axle support cone; the shaft rods at both ends of the mixing wheel are respectively connected to the axle support cone and the lower shaft hole.

[0008] The upper end of the burner nozzle plate is provided with an annular stopper, the outer diameter of the annular stopper is provided with an external thread; the lower end of the mixing chamber is provided with an internal thread opening; the annular stopper and the internal thread opening are thread-locked and connected.

[0009] The mixing wheel is a conical component, and a plurality of spiral blades are arranged on the oblique conical surface of the mixing wheel; the spiral blades stir the solid-gas mixture.

[0010] A plurality of nozzles are arranged in a circular array with the axis-cone as the axis.

[0011] The present technical scheme provides a petroleum coke powder fuel injector for a carbon roasting furnace, comprising: a first mixing jet tube, a second mixing jet tube, a burner nozzle disk, and a mixing wheel; the first mixing jet tube, the second mixing jet tube and the burner nozzle disk are connected in sequence by pipelines; a first fluid access tube and a first drainage tube are provided on the tube body of the first mixing jet tube; a second drainage tube and a mixing chamber are provided on the tube body of the second mixing jet tube; the first drainage tube is arranged on one side of the first mixing jet tube; the second drainage tube is arranged on one side of the second mixing jet tube; the vertical axis of the mixing wheel is connected in the mixing chamber; the first fluid access tube is connected to the combustible gas; the first fluid access tube is connected to the combustion-supporting gas; the second drainage tube is connected to the petroleum coke powder, and the combustible gas and the combustion-supporting gas are mixed to drain the petroleum coke powder into the second mixing jet tube; the solid-gas mixture is mixed in the mixing chamber and then sprayed from a plurality of nozzles on the burner nozzle disk, thereby achieving the purpose of full combustion and energy saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is an overall schematic diagram of a petroleum coke powder fuel injector for a carbon roasting furnace;

[0013] Figure 2 This is a schematic cross-sectional view of the structure of a petroleum coke powder fuel injector for a carbon roasting furnace;

[0014] Figure 3 This is a schematic diagram of the combustion nozzle structure of a petroleum coke powder fuel injector for a carbon roasting furnace;

[0015] Figure 4 This is a schematic diagram of a mixing wheel of a petroleum coke powder fuel injector for a carbon roasting furnace;

[0016] In the figure: 1, first mixing jet tube, 11, first fluid access tube, 12, first negative pressure chamber, 13, first nozzle, 14, first drainage tube, 141, first drainage interface, 15, first throat, 16, first air outlet, 2, second mixing jet tube, 21, second fluid access tube, 22, second negative pressure chamber, 23, second nozzle, 24, second drainage tube, 25, second throat, 26, upper wheel shaft frame, 261, upper shaft rod through hole, 27, mixing chamber, 3, burner nozzle plate, 31, annular stop, 311, external thread, 32, shaft against cone, 321, lower shaft hole, 33, nozzle, 4, mixing wheel, 41, upper shaft rod, 42, lower shaft rod, 43, spiral blade. DETAILED DESCRIPTION

[0017] The technical scheme will be further described clearly and completely below in conjunction with the accompanying drawings of the technical scheme. The described embodiments are only a part of the technical scheme, not all of the embodiments. Based on the technical scheme, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model. Example

[0018] See also Figures 1 to 4 As shown, a petroleum coke powder fuel injector for a carbon roasting furnace comprises: a first mixing jet pipe 1, a second mixing jet pipe 2, a burner nozzle plate 3, and a mixing wheel 4;

[0019] The first mixing jet tube 1 and the second mixing jet tube 2 are flange-connected; the second mixing jet tube 2 and the burner nozzle plate 3 are threadedly connected; a mixing chamber is provided in the second mixing jet tube 2, and a mixing wheel 4 is vertically axially connected in the mixing chamber.

[0020] The first mixing jet tube 1 is a Venturi effect tube.

[0021] The first mixing jet pipe 1 is provided with: a first fluid inlet pipe 11, a first negative pressure chamber 12, a first nozzle 13, a first drainage pipe 14, a first throat pipe 15, and a first air outlet 16;

[0022] The first fluid access pipe 11 is arranged at the upper part of the first mixing jet pipe 1; a flange is arranged at the end of the first fluid access pipe 11; the first fluid access pipe 11 is connected to the working fluid supply pipeline through the flange;

[0023] The working fluid supply source is a combustible gas tank or a combustible gas supply network pipeline;

[0024] The first fluid access pipe 11 is arranged at the upper end of the first negative pressure chamber 12; the first throat pipe 15 is arranged at the lower end of the first negative pressure chamber 12; the first nozzle 13 is arranged in the first negative pressure chamber 12, and the first fluid access pipe 11 is connected to the first nozzle 13 by pipeline; the first air outlet 16 is arranged below the first throat pipe 15;

[0025] The end of the first nozzle 13 is arranged at the transition between the first negative pressure chamber 12 and the first throat pipe 15;

[0026] One end of the first drainage tube 14 is provided with a first drainage interface 141 , and the first drainage interface 141 is provided with a connecting thread; the other end of the first drainage tube 14 is connected to the first negative pressure chamber 12 .

[0027] The first fluid inlet pipe 11 is connected to the combustible gas; the first drainage pipe 14 is connected to the combustion-supporting gas;

[0028] The combustible gas is fuel gas or natural gas; the combustion-supporting gas is oxygen.

[0029] The second mixing jet pipe 2 is provided with: a second fluid inlet pipe 21, a second negative pressure chamber 22, a second nozzle 23, a second drainage pipe 24, a second throat pipe 25, an upper wheel shaft frame 26, and a mixing chamber 27;

[0030] The second fluid inlet pipe 21 is arranged at the upper part of the second mixing jet pipe 2 ; the second fluid inlet pipe 21 is flange-connected to the first air outlet 16 .

[0031] The second fluid inlet pipe 21 is arranged at the upper end of the second negative pressure chamber 22; the second negative pressure chamber 22, the second throat pipe 25 and the mixing chamber 27 are connected in sequence; the second nozzle 23 is arranged in the second negative pressure chamber 22; the end of the second nozzle 23 is arranged at the transition between the second negative pressure chamber 22 and the second throat pipe 25; the upper wheel shaft frame 26 is arranged at the transition between the second throat pipe 25 and the mixing chamber 27;

[0032] One end of the second drainage tube 24 is provided with a connecting thread, and the other end of the second drainage tube 24 is connected to the second negative pressure chamber 22;

[0033] An upper shaft rod through hole 261 is provided at the center of the upper wheel shaft frame 26 .

[0034] The upper end of the burner nozzle plate 3 is provided with an annular stop 31, and the outer diameter of the annular stop 31 is provided with an external thread 311;

[0035] The lower end of the mixing chamber 27 is provided with an internal thread opening 271; the annular stop opening 31 is thread-lockedly connected to the internal thread opening 271;

[0036] The middle part of the upper end of the burner nozzle plate 3 is provided with an axis-receiving cone 32, and the middle part of the axis-receiving cone 32 is provided with a lower axis hole 321;

[0037] The burner nozzle plate 3 is provided with a plurality of nozzles 33; the plurality of nozzles 33 are arranged in a circular array with the axis-cone 32 as the axis center;

[0038] A plurality of reinforcing ribs 34 are provided between the plurality of nozzles 33 , and a guide slope is provided on the side of the reinforcing ribs 34 .

[0039] The mixing wheel 4 is a conical component, and an upper shaft 41 and a lower shaft 42 are respectively provided at the upper and lower ends of the mixing wheel 4; a plurality of spiral blades 43 are provided on the oblique conical surface of the mixing wheel 4; the spiral blades 43 stir the solid-gas mixture;

[0040] The upper shaft rod 41 is axially connected to the upper shaft rod through hole 261 ; the lower shaft rod 42 is axially connected to the lower shaft hole 321 .

[0041] The first fluid inlet pipe 11 is connected to the combustible gas; the first drainage pipe 14 is connected to the combustion-supporting gas; the second drainage pipe 24 is connected to the petroleum coke powder; the first mixing jet pipe 1 with a Venturi effect mixes the combustible gas and the combustion-supporting gas to increase the speed, and then guides the petroleum coke powder into the mixing chamber 27 through the second mixing jet pipe 2, and the high-speed airflow drives the mixing wheel 4 to rotate; and the mixed gas and the petroleum coke powder are spirally stirred and mixed in the mixing chamber 27, and sprayed from a number of nozzles on the burner nozzle plate, so as to achieve the purpose of full combustion and energy saving.

Claims

1. A petroleum coke powder fuel injector for a carbon roasting furnace, comprising: A first mixing jet tube (1), a second mixing jet tube (2), a burner nozzle disk (3), and a mixing wheel (4); characterized in that: the first mixing jet tube (1), the second mixing jet tube (2), and the burner nozzle disk (3) are connected in sequence by pipelines; the first mixing jet tube (1) is provided with a first fluid inlet tube (11), a first drainage tube (14), and a first air outlet port (16); the second mixing jet tube (2) is provided with a second fluid inlet tube (21), a second drainage tube (24), and a mixing chamber (27); the first air outlet port (16 ) and a second fluid access pipe (21) are flange-connected; the first drainage pipe (14) is arranged on one side of the first mixing jet pipe (1); the second drainage pipe (24) is arranged on one side of the second mixing jet pipe (2); the mixing wheel (4) is vertically axially connected in the mixing chamber (27); a plurality of nozzles (33) are arranged on the burner nozzle plate (3); the first fluid access pipe (11) is connected to the combustible gas; the first drainage pipe (14) is connected to the combustion-supporting gas; the second drainage pipe (24) is connected to the petroleum coke powder, and the solid-gas mixture is mixed in the mixing chamber (27) and then sprayed out from the nozzle (33).

2. The petroleum coke powder fuel injector for carbon roasting furnace according to claim 1, characterized in that: The tube body of the first mixing jet tube (1) is also provided with: a first negative pressure chamber (12), a first nozzle (13), and a first throat (15); the first fluid access tube (11) is arranged at the upper end of the first negative pressure chamber (12); the first throat (15) is arranged at the lower end of the first negative pressure chamber (12); the first air outlet (16) is arranged below the first throat (15); the first nozzle (13) is arranged in the first negative pressure chamber (12), and the first fluid access tube (11) is connected to the first nozzle (13) by pipeline; the end of the first nozzle (13) is arranged at the transition point between the first negative pressure chamber (12) and the first throat (15); one end of the first drainage tube (14) is provided with a first drainage interface (141), and the first drainage interface (141) is provided with a connecting thread; the other end of the first drainage tube (14) is connected to the first negative pressure chamber (12).

3. The petroleum coke powder fuel injector for carbon roasting furnace according to claim 2, characterized in that: The tube body of the second mixing jet tube (2) is further provided with: a second negative pressure chamber (22), a second nozzle (23), a second throat pipe (25), and an upper axle frame (26); the second fluid access pipe (21) is arranged at the upper end of the second negative pressure chamber (22); the second negative pressure chamber (22), the second throat pipe (25) and the mixing chamber (27) are connected in sequence; the second nozzle (23) is arranged in the second negative pressure chamber (22); the end of the second nozzle (23) is arranged at the transition point between the second negative pressure chamber (22) and the second throat pipe (25); the upper axle frame (26) is arranged at the transition point between the second throat pipe (25) and the mixing chamber (27); one end of the second drainage tube (24) is provided with a connecting thread, and the other end of the second drainage tube (24) is connected to the second negative pressure chamber (22).

4. The petroleum coke powder fuel injector for carbon roasting furnace according to claim 3, characterized in that: An upper shaft rod through hole (261) is provided at the center of the upper wheel shaft frame (26); an axle support cone (32) is provided at the middle of the upper end of the burner nozzle plate (3), and a lower shaft hole (321) is provided at the middle of the axle support cone (32); and shafts at both ends of the mixing wheel (4) are axially connected to the axle support cone (32) and the lower shaft hole (321) respectively.

5. The petroleum coke powder fuel injector for carbon roasting furnace according to claim 4, characterized in that: The upper end of the burner nozzle disc (3) is provided with an annular stop (31), and the outer diameter of the annular stop (31) is provided with an external thread (311); the lower end of the mixing chamber (27) is provided with an internal thread opening (271); the annular stop (31) and the internal thread opening (271) are thread-lockedly connected.

6. The petroleum coke powder fuel injector for carbon roasting furnace according to claim 5, characterized in that: The mixing wheel (4) is a conical component, and a plurality of spiral blades (43) are provided on the oblique conical surface of the mixing wheel (4); the spiral blades (43) stir the solid-gas mixture.

7. The petroleum coke powder fuel injector for carbon roasting furnace according to claim 6, characterized in that: A plurality of nozzles (33) are arranged in a ring array with the axial cone (32) as the axis.

Images