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CN-117443105-B - Dust removal device for blast furnace ironmaking cast house and filter plate replacement method thereof

CN117443105BCN 117443105 BCN117443105 BCN 117443105BCN-117443105-B

Abstract

The invention belongs to the technical field of iron making and dust removing, and particularly relates to a dust removing device for a blast furnace iron making cast house, which comprises a frame, an air inlet pipe, an exhaust pipe, a filter box mechanism, a screen changing mechanism and a fan, wherein the air inlet pipe, the exhaust pipe, the filter box mechanism, the screen changing mechanism and the fan are arranged on the frame, the filter box mechanism comprises a first box body, a second box body and an opening and closing driving device, the screen changing mechanism comprises a translation bracket, a translation driving device, a rotation bracket, a rotation driving device and a filter plate, two filter plates can be alternatively positioned between the first box body and the second box body through rotation of the rotation bracket, and the first box body and the second box body can clamp the filter plates between the first box body and the second box body and form a sealing structure. The invention also provides a filter plate replacing method of the blast furnace ironmaking cast house dust removing device. The invention can automatically replace the standby filter plate for the in-use filter plate, greatly shortens the shutdown time of the dust removing device, and has the advantages of good dust removing effect, lower cost and smaller space occupation.

Inventors

  • HU YATAO
  • Gu zhao

Assignees

  • 山东钢铁股份有限公司

Dates

Publication Date
20260505
Application Date
20231211

Claims (8)

  1. 1. A dust removal device for a blast furnace ironmaking cast house is characterized in that: comprises a frame, an air inlet pipe (5), an exhaust pipe (12), a filter box mechanism, a net changing mechanism and a fan (4) which are arranged on the frame; the filter box mechanism comprises a first box body (7), a second box body (8) and an opening and closing driving device, wherein the air inlet end of the first box body (7) is connected with an air inlet pipe (5) through a first corrugated pipe (9), the air outlet end of the second box body (8) is connected with an exhaust pipe (12) through a second corrugated pipe (11), the air outlet end of the first box body (7) and the air inlet end of the second box body (8) are oppositely arranged, and the opening and closing driving device is used for driving the first box body (7) and the second box body (8) to move oppositely or reversely; The screen changing mechanism comprises a translation bracket (23), a translation driving device, a rotation bracket (16), a rotation driving device and a filter plate (19), wherein the translation bracket (23) is arranged on a rack in a linearly movable manner, the translation driving device is used for driving the translation bracket (23) to linearly move, the rotation bracket (16) is rotatably arranged on the translation bracket (23), the rotation driving device is used for driving the rotation bracket (16) to rotate, the filter plate (19) is provided with two filter plates which are arranged on the rotation bracket (16) at intervals and can be detachably arranged, the translation driving device can drive the filter plate (19) to be cleaned to leave between the first box (7) and the second box (8), the two filter plates (19) can be alternatively positioned between the first box (7) and the second box (8) through the rotation of the rotation bracket (16), and the first box (7) and the second box (8) can clamp the filter plate (19) between the first box (7) and the second box (8) and form a sealing structure; the fan (4) is used for enabling air to flow from the air inlet pipe (5) to the exhaust pipe (12).
  2. 2. A blast furnace ironmaking cast house dust collector as claimed in claim 1, characterized in that a plurality of air inlet hoods (6) are arranged on the air inlet pipe (5) at intervals.
  3. 3. The blast furnace ironmaking cast house dust collector of claim 1, characterized in that one side of the bottom of the first box body (7) is connected with an ash receiving box (13), the bottom of the first box body (7) is provided with an inclined plane (27) for enabling dust to move towards the ash receiving box (13), the bottom of the ash receiving box (13) is provided with an ash discharging port, and the ash receiving box (13) is provided with a cover plate (28) for opening and closing the ash discharging port.
  4. 4. A blast furnace ironmaking cast house dust collector as claimed in claim 1, characterized in that the fan (4) is located between the air inlet pipe (5) and the first bellows (9).
  5. 5. The blast furnace ironmaking cast house dust collector as claimed in claim 1, characterized in that the opening and closing driving means comprises two cylinders (14) mounted on the frame, the piston rods of the two cylinders (14) being connected with the first box (7) and the second box (8) respectively.
  6. 6. The blast furnace ironmaking cast house dust collector of claim 1, characterized in that the translation driving device comprises a first motor (25) mounted on a frame, a screw transmission mechanism, the screw transmission mechanism comprises a screw (21) and a slide block (22), the screw (21) is in threaded fit with the slide block (22), the slide block (22) is connected with a translation bracket (23), and an output shaft of the first motor (25) is connected with the screw (21).
  7. 7. A blast furnace ironmaking cast house dust collector as claimed in claim 1, characterized in that the rotary drive means comprises a second motor (26) mounted on a translation carriage, the output shaft of the second motor (26) being connected to the rotary carriage (16).
  8. 8. A method for replacing a filter plate of a dust removal device for a blast furnace ironmaking cast house according to any one of claims 1 to 7, comprising the steps of: S1, closing a fan (4); S2, controlling the opening and closing driving device to drive the first box body (7) and the second box body (8) to move reversely, so as to release the filter plate (19) to be cleaned; s3, controlling a translation driving device to drive a filter plate (19) to be cleaned to leave between the first box body (7) and the second box body (8); s4, controlling the rotary driving device to drive the filter plate (19) to be cleaned and the standby filter plate (19) to exchange positions, and controlling the translational driving device to drive the standby filter plate (19) to be inserted between the first box body (7) and the second box body (8); s5, controlling the opening and closing driving device to drive the first box body (7) and the second box body (8) to move in opposite directions, so as to clamp the standby filter plate (19) and form a sealing structure; S6, restarting the fan (4), and finally removing the filter plate (19) to be cleaned from the rotary support (16) and cleaning, and mounting the filter plate back to the original position for standby after the cleaning is finished.

Description

Dust removal device for blast furnace ironmaking cast house and filter plate replacement method thereof Technical Field The invention belongs to the technical field of iron making and dust removing, and particularly relates to a dust removing device for a blast furnace iron making cast house and a filter plate replacing method thereof. Background Blast furnace ironmaking is a method for continuously producing liquid pig iron in a blast furnace by using coke, iron-containing ore and flux, and is one of the most common steel production modes at the present stage, however, in the process of ironmaking, because the blast furnace can emit a large amount of dust with particles in the process of tapping or deslagging, dust removal equipment is correspondingly adopted to treat particle dust, so that the harm to the environment is reduced, and the dust is extracted by using blast equipment, and is filtered in the extraction process, so that the particle impurities in the dust can be filtered. However, in the use process of the dust removing mode, it is found that, due to the large dust content, the filter screen can adhere to more granular dust after being used for a period of time, and the filtering performance of the filter screen can be influenced over time, so that the dust removing equipment needs to be closed at intervals, the filter screen is detached for cleaning or replacement, the whole dust removing equipment can be stopped, and due to the high temperature of dust particles in a cast house, the temperature of the filter screen is also high, the filter screen needs to be cooled for a period of time for cleaning during cleaning, thus delaying the subsequent dust removing work, and the dust removing process is long, which is unfavorable for the continuous operation of blast furnace ironmaking work. The 'one-by-one' is a common way to solve the above problems, namely, two groups of parallel dust collectors are arranged, and the two groups of dust collectors work alternately under the control of a valve, such as a miniature double-fan bag type dust collector disclosed by CN202893093U, which consists of two sets of relatively independent dust collection systems, when one system reaches the ash removal requirement, the centrifugal fan stops working, and the system enters an ash removal state. And after one ash cleaning period is completed, the filter state is again entered. The two systems are mutually switched, one is used for one, and the two systems can also be used simultaneously, so that the functions of off-line ash removal and off-line maintenance among the systems are realized. The disadvantage of this approach is that two separate sets of dust removal devices are required, resulting in high cost and large space occupation. Disclosure of Invention Aiming at the defects in the prior art, the invention provides the dust removing device for the blast furnace ironmaking cast house, and the replacement of the filter plate in use is automatically carried out by the spare filter plate, so that the downtime of the dust removing device is shortened, the dust removing operation is carried out rapidly and continuously, and the dust removing effect is ensured. The invention provides a dust removing device of a blast furnace ironmaking cast house, which comprises a frame, an air inlet pipe, an exhaust pipe, a filter box mechanism, a net changing mechanism and a fan, wherein the air inlet pipe, the exhaust pipe, the filter box mechanism, the net changing mechanism and the fan are arranged on the frame, the filter box mechanism comprises a first box body, a second box body and an opening and closing driving device, the air inlet end of the first box body is connected with the air inlet pipe through a first corrugated pipe, the air outlet end of the second box body is connected with the exhaust pipe through a second corrugated pipe, the air outlet end of the first box body and the air inlet end of the second box body are oppositely arranged, the opening and closing driving device is used for driving the first box body and the second box body to move oppositely or reversely, the net changing mechanism comprises a translation bracket, a translation driving device, a rotary bracket, a rotary driving device and a filter plate, the translation driving device is arranged on the frame in a linear manner, the translation bracket is used for driving the linear movement, the rotary bracket is rotatably arranged on the translation bracket, the rotary driving device is used for driving the rotary bracket to rotate, the filter plate is arranged on the rotary bracket, the rotary bracket is arranged on the rotary bracket, the filter plate is arranged on the rotary bracket, and is arranged on the rotary bracket in a space, the rotary bracket, the filter plate is detachably arranged on the rotary bracket, the first box body and the filter plate can be clamped between the first box and the second box through the first box and the air inl