CN-117482673-B - Smoke dust treatment device of steelmaking electric furnace

CN117482673BCN 117482673 BCN117482673 BCN 117482673BCN-117482673-B

Abstract

The invention relates to the technical field of steelmaking electric furnaces, and discloses a smoke dust treatment device of a steelmaking electric furnace, a liquid atomization generator, a compressed air generator and a ceramic bracket, wherein the output end of the liquid atomization generator is connected with a water pipe for conveying water mist generated by the liquid atomization generator, one end of the water pipe is communicated with an atomization spray ring with a hollow inside, and the output end of the compressed air generator is connected with a compressed air pipe for conveying compressed air generated by the compressed air generator. According to the invention, the gas curtain and the gas fog layer are arranged at the electrode holes to inhibit dust-containing flue gas in the electric furnace from spraying and overflowing from the electrode holes, so that the environment in the doghouse is improved, the electrodes can be effectively cooled, the electrode consumption is reduced, the failure rate of smelting equipment is reduced, the production cost is reduced, the inhibiting effect on the dust-containing flue gas is effectively improved, the leakage of the dust-containing flue gas is avoided, and the cooling effect on the electrodes can be improved.

Inventors

ZHANG SUYU
ZHANG LIGONG
ZHANG FEI
ZHANG XINKE
WU JIANJUN
WEI MINGKUN
CHEN FANG
WU BEN
SHEN DAN

Assignees

江苏沙钢集团有限公司
江苏沙钢钢铁有限公司

Dates

Publication Date: 20260505
Application Date: 20231218

Claims (7)

1. The smoke dust treatment device of the steelmaking electric furnace is characterized by comprising a liquid atomization generator, a compressed air generator and a ceramic bracket (1), wherein the output end of the liquid atomization generator is connected with a water pipe (2) for conveying water mist generated by the liquid atomization generator, one end of the water pipe (2) is communicated with an atomization spray ring (3) with the inside arranged as a hollow shape, the output end of the compressed air generator is connected with a compressed air pipe (4) for conveying compressed air generated by the compressed air generator, one end of the compressed air pipe (4) is communicated with an air curtain ring (5) with the inside arranged as a hollow shape, and flow regulating valves (6) and a differential pressure transmitter (7) are fixedly arranged on the water pipe (2) and the compressed air pipe (4); The central axes of the atomizing spray ring (3) and the air curtain ring (5) are arranged in line with the central line axis of the electrode, the outer side surfaces of the atomizing spray ring (3) and the air curtain ring (5) are fixedly connected with the ceramic bracket (1), and the outer side surfaces of the ceramic bracket (1) are fixedly connected with the top cover of the electric furnace; a plurality of A spray holes (8) which are distributed in a circumferential array shape by taking the central axis as the center are arranged on the atomizing spray ring (3); the air curtain ring (5) is provided with a plurality of B spray holes (9) which are distributed in a circumferential array shape by taking the central axis as the center; One ends of the spray holes A (8) and B (9) incline downwards towards the bottom end of the electrode; the device also comprises an A guide vane (10), a B guide vane (11), an A driving piece (12) and a B driving piece (13); The two sides of the A guide vane (10) are in sliding connection with the inner wall of the A spray hole (8), the A guide vane (10) can move to a first position and a second position along the moving direction of water mist, the A guide vane (10) is connected with an A driving piece (12) for driving the A guide vane to move, and the A spray hole (8) is divided into an A flow channel and a B flow channel by the A guide vane (10); When the guide vane A (10) moves to the first position, the guide vane A (10) plugs the flow passage A, and the flow passage B is in an open state; the two sides of the B guide vane (11) are in sliding connection with the inner wall of the B spray hole (9), the B guide vane (11) can move to a first position and a second position along the moving direction of water mist, the B guide vane (11) is connected with a B driving piece (13) for driving the B guide vane to move, and the B spray hole (9) is divided into a C flow channel and a D flow channel by the B guide vane (11); when the B guide vane (11) moves to the first position, the B guide vane (11) plugs the C flow channel, and the D flow channel is in an open state; The A driving piece (12) comprises an A rotary table (121) rotatably arranged on the atomizing spray ring (3), two A inclined slots (122) are formed in the A rotary table (121), an A guide pillar (123) is slidably connected to the inner wall of the A inclined slots (122), one end of the A guide pillar (123) is fixedly connected with the A guide vane (10), and the A rotary table (121) is connected with an A driving mechanism (124) for driving the A rotary table to rotate around a spool line; The A driving mechanism (124) comprises an A arc-shaped rack (1241) fixedly arranged outside the A rotary table (121), one side of the A arc-shaped rack (1241) is meshed with an A rack (1242), the A rack (1242) is connected with an A supporting frame (1243) capable of axially moving along the ceramic bracket (1), and the A supporting frame (1243) is connected with an A telescopic driving piece (1244) for driving the A supporting frame to move.
2. A smoke treatment device for a steelmaking electric furnace as claimed in claim 1, characterized in that the liquid atomization generator, the compressed air generator and the flow regulating valve (6) are connected with a controller for controlling the power of the liquid atomization generator, the compressed air generator and the opening of the flow regulating valve (6).
3. The smoke and dust treatment device of a steelmaking electric furnace according to claim 1, wherein the B driving piece (13) comprises a B rotary table (131) rotatably installed on the air curtain ring (5), a B chute (132) is formed in the B rotary table (131), a B guide pillar (133) is slidably connected to the B chute (132), one end of the B guide pillar (133) is fixedly connected with the B guide vane (11), and the B rotary table (131) is connected with a B driving mechanism (134) for driving the B rotary table (131) to rotate around a spool line thereof.
4. A smoke and dust treatment device for a steelmaking electric furnace according to claim 3, wherein the B driving mechanism (134) comprises a B arc-shaped rack (1341) fixedly arranged outside the B turntable (131), a B rack (1342) is meshed with one side of the B arc-shaped rack (1341), the B rack (1342) is connected with a B supporting frame (1343) capable of axially moving along the ceramic bracket (1), and the B supporting frame (1343) is connected with a B telescopic driving piece (1344) for driving the B supporting frame to move.
5. A smoke and dust treatment device for a steelmaking furnace as claimed in claim 1, wherein the a guide vane (10) is provided with a ramp near the outlet end of the a runner.
6. A smoke and dust treatment device for a steelmaking furnace as claimed in claim 5, wherein a ramp is provided at the outlet end of the B-runner (11) adjacent to the B-runner.
7. The smoke and dust treatment device for a steelmaking electric furnace according to claim 6, wherein the boss surfaces on the guide vane A (10) and the guide vane B (11) are respectively provided with elastic rubber pads.

Description

Smoke dust treatment device of steelmaking electric furnace Technical Field The invention relates to the field of steelmaking electric furnaces, in particular to a smoke dust treatment device of a steelmaking electric furnace. Background In order to facilitate the electrode to pass through the furnace cover and move up and down for adjustment, a certain gap exists between the electrode hole on the furnace cover and the electrode positioned in the furnace cover, during the electric furnace steelmaking process, the gas in the furnace is rapidly expanded after high temperature and pressure loss, the fourth hole can not fully absorb the expanded dust-containing smoke, especially in the oxygen blowing stage, the smoke yield is larger, excessive smoke is sprayed into the surrounding environment from the gap between the electrode hole at the top of the furnace cover and the electrode, even if the doghouse is fully closed, and the supporting dust removing facility is used, the smoke still has a certain proportion of deposition after entering the doghouse, the safety of equipment and personnel is affected, the phenomenon is more obvious in a common electric furnace enterprise without the doghouse, and is a great important source of workshop dust concentration, meanwhile, the traditional electrode spray ring is arranged near the electrode holder, and the cooling effect is obviously reduced at the position of the furnace cover. Disclosure of Invention The invention provides a smoke dust treatment device for a steelmaking electric furnace, which solves the technical problems that in the steelmaking process of the electric furnace in the related technology, gas in the furnace rapidly expands after high temperature and pressure loss, the fourth hole cannot fully absorb the expanded dust-containing smoke, and especially in the oxygen blowing stage, the smoke dust yield is larger, excessive smoke gas is sprayed into the surrounding environment from a gap between an electrode hole at the top of a furnace cover and an electrode, the traditional electrode spray ring is arranged near an electrode holder, and the cooling effect is obviously reduced at the position of the furnace cover. The invention provides a smoke dust treatment device of a steelmaking electric furnace, which comprises a liquid atomization generator, a compressed air generator and a ceramic bracket, wherein the output end of the liquid atomization generator is connected with a water pipe for conveying water mist generated by the liquid atomization generator, one end of the water pipe is communicated with an atomization spray ring with a hollow inside, the output end of the compressed air generator is connected with a compressed air pipe for conveying compressed air generated by the compressed air generator, one end of the compressed air pipe is communicated with an air curtain ring with a hollow inside, and flow regulating valves and differential pressure transmitters are fixedly arranged on the water pipe and the compressed air pipe; the central axes of the atomizing spray ring and the air curtain ring are arranged in line with the central line axis of the electrode, the outer side surfaces of the atomizing spray ring and the air curtain ring are fixedly connected with the ceramic bracket, and the outer side surface of the ceramic bracket is fixedly connected with the electric furnace top cover; the atomizing spray ring is provided with a plurality of A spray holes which are distributed in a circumferential array shape by taking the central axis as the center; the air curtain ring is provided with a plurality of B spray holes which are distributed in a circumferential array shape by taking the central axis as the center; one ends of the spray holes A and B face downwards obliquely to the bottom end of the electrode. Further, the liquid atomization generator, the compressed air generator and the flow regulating valve are connected with a controller, and the controller is used for controlling the power of the liquid atomization generator and the compressed air generator and the opening of the flow regulating valve. Further, the device also comprises an A guide vane, a B guide vane, an A driving piece and a B driving piece; The two sides of the guide vane A are in sliding connection with the inner wall of the spray hole A, the guide vane A can move to a first position and a second position along the moving direction of water mist, the guide vane A is connected with a driving piece A which drives the guide vane A to move, and the guide vane A divides the spray hole A into a flow passage A and a flow passage B; When the A flow deflector moves to the first position, the A flow deflector seals the A flow passage, and the B flow passage is in an open state; The two sides of the B guide vane are in sliding connection with the inner wall of the B spray hole, the B guide vane can move to a first position and a second position along the moving direction of water mist, t