CN211637676U - Ladle hot repair dust arrester installation - Google Patents

Abstract

The ladle hot repair dust collection device mainly comprises an upper wall plate, a side wall plate, a flow guide inclined plate, a necking flue, a straight flue, a movable turning plate, a rotating shaft, an electro-hydraulic push rod, a baffle, a base, a lifting lug and refractory mortar; the method is characterized in that: the smoke inlet of the dust collection cover is provided with a movable turning plate, and the movable turning plate can be quickly opened outwards by 60-65 degrees within 10 seconds after the dust collection cover starts under the action of the electro-hydraulic push rod to form a guide plate together with the side plate, so that the dust collection efficiency is greatly improved. The collected flue gas is connected to an underground flue through a necking flue and a straight flue and finally enters a dust removal system to be discharged after reaching the standard. The air inducing flue adopts an underground flue form, so that the space can be saved, and the influence on the hot repair and the hoisting of the steel ladle is minimized. The dusty flue gas rushes out from the ladle mouth and can collide with the baffle plate covered with refractory mortar, large-particle matters such as waste residues and the like sink to the ground under the action of impact force and gravity, the problem of serious dust deposition caused by entering an underground flue is avoided, and the service life of the device is prolonged.

Description

Ladle hot repair dust arrester installation

The technical field is as follows:

the utility model relates to a steelmaking auxiliary assembly and environmental protection equipment technical field especially relate to a dust arrester installation for ladle hot repair.

Background art:

in the prior art, ladle hot repair refers to a process of hoisting a ladle after continuous casting steel casting is finished into a ladle repair station and repairing a sliding water gap at the bottom of the ladle in a converter steelmaking process. Ladle hot repair is an important process for converter production, and the operation speed of the ladle hot repair directly influences the steel-making yield. The sliding water gap is opened by adopting oxygen blowing drainage, and when oxygen blowing operation is carried out, a large amount of smoke can be generated at the upper opening of the steel ladle instantly due to the reaction of oxygen and steel slag and the pressure brought by the oxygen. The part of the flue gas has high temperature, high flow speed and high dust content, causes serious pollution to the operation posts of workers, and also pollutes the environment when the part of the flue gas overflows to the atmosphere. Along with the control of the environmental protection department on the discharge of unorganized waste gas, each large steel mill is matched with a ladle hot repair smoke treatment facility. At present, two design ideas are provided for the hot repair flue gas collecting device, one adopts a fixed type, and the other adopts a movable type or a semi-fixed type. The existing fixed dust collecting device consists of a semi-closed top suction cover, an outlet pipeline and a rear end dust removing system, the dust collecting device is only suitable for the condition that a hot repair ladle is transported by an overground rail car, and the ladle can be transported to a ladle repairing station through the overground rail car, so that fixed dust collection is realized. However, most steel mills transport the steel ladles by adopting a workshop travelling crane hoisting mode, so that the fixed dust collecting device does not have large-area popularization conditions. Most of the existing movable or semi-fixed dust collecting devices adopt a route of 'ground rail + movable top suction cover + pipeline and valve + fixed rear end dust removing system'. When the ladle is repaired in a hot mode, the top suction cover moves to a ladle repairing station through the ground rail, covers the whole ladle, is opened corresponding to the outlet switching valve, and collects the flue gas generated by hot repair to the rear end dust removal system for treatment. The movable dust collecting device needs to be paved with a ground rail and provided with an electric actuating mechanism, the equipment is complex, and the movable dust collecting device does not work and needs to be placed beside a bag repairing station to occupy a certain space. A large amount of steel slag can be sputtered from a ladle opening during ladle hot repair, and the ground rail is easy to block due to untimely cleaning, so that the problems of derailment or jamming and the like in the moving process of the top suction cover are caused. Therefore, in the actual operation process, the movable dust collecting device has the defects of high failure rate, large occupied area and the like, and is not suitable for steel-making users with compact plants and high capacity utilization rate.

The invention content is as follows:

the invention aims to overcome the defects of the prior art, and provides a ladle hot repair dust collecting device which can solve the problems that a steel plant produces paroxysmal smoke pollution due to a ladle hot repair process, the existing movable dust collecting cover is large in occupied area and not suitable for the plant with compact space, and the movable dust collecting cover is easy to slag and derail or clamp a roller, so that the movable dust collecting cover is frequently required to be repaired or even cannot be used.

The utility model provides a scheme that its technical problem adopted is: the ladle hot repair dust collection device comprises a straight flue and a base; the device is characterized by also comprising an upper wall plate, a side plate, an inclined plate, a movable turning plate, a necking flue, a rotating shaft, an electro-hydraulic push rod, a baffle plate, a lifting lug and an observation port; the external frame of the ladle hot repair dust collection device is formed by connecting an upper wall plate with a rear wall plate, a left side plate, a right side plate, a front baffle plate, an inclined plate, a movable turning plate and an electro-hydraulic push rod, wherein the movable turning plate is movably connected with the upper wall plate through a rotating shaft; the flue gas pipeline in the ladle hot repair dust collection device is formed by welding an inclined plate, a necking flue and a straight flue; the lifting lugs are welded in the middle of the top of the upper wall plate and in the middle of the upper parts of the two side plates; a refractory mud layer is built by the diversion sloping plate and the baffle plate which are close to the ladle side; two observation ports are arranged on the front baffle and the two sides of the refractory mortar layer; the upper end of a straight flue of the ladle hot repair dust collection device is welded with the necking flue, and the lower end of the straight flue is communicated with an underground flue; a sliding water gap is arranged on the ladle; the ladle hot repair dust collection device is arranged in front of and above a flue gas outlet of the ladle; the steel ladle is fixed on the steel ladle hot repair rack; the upper wall plate, the side plate and the lower part of the baffle are fixedly connected with the base; the base is in threaded connection with the ground reference surface; the electro-hydraulic push rod consists of a motor, a coupling, an oil pump, an oil circuit manifold block, an access cover plate, an oil discharge pipe, a piston rod, a working oil cylinder, an oil tank, a sealing assembly and an oil tank base which are connected with each other; the motor is directly connected with the oil pump through a coupler; two oil suction ports arranged on the oil pump are communicated with two oil discharge pipe oil paths arranged on the oil path manifold block; one of the two oil discharge pipes arranged on the oil circuit manifold block is communicated with the working oil cylinder; the other of the two oil discharge pipes of the oil circuit manifold block is communicated with an oil tank; the oil tank is provided with an access hole and a cover plate at the position close to the oil circuit manifold block; a sealing component is arranged at the working end of a piston rod in the working oil cylinder; the working end of the piston rod is connected with one end of the crank connecting rod mechanism; the other end of the crank connecting rod mechanism is movably connected with the rotating shaft; the oil tank base of the electro-hydraulic push rod is welded on the side plate; the oil tank base is fixedly connected with the side plate through a support, and the adjustable angle of the movable turning plate is 0-65 degrees; it is also characterized in that: the inclined plate and the baffle plate are welded on the inner side of the side plate and are fixedly connected with each other; the necking flue is fixedly connected with the upper wall plate, the side plate and the inclined plate;

the upper end of the straight flue is welded with the necking flue, and the lower end of the necking flue is communicated with the underground flue by adopting a flange bolt; the baffle and the inclined plate which plays a role of guiding the flue gas flow are arranged right opposite to the flue gas outlet of the ladle.

The utility model has the advantages that: 1. because the movable turning plate is adopted at the top of the ladle hot repair dust collection device, when the dust collection device works, the movable turning plate is opened to form an effect similar to a top suction cover, dust-containing hot flue gas can be well prevented from flowing upwards so as to be completely collected by the dust collection cover, the problem that the steel ladle hot repair flue gas is inorganically discharged to pollute the atmosphere is well solved, the national environmental protection treatment requirement is met, and meanwhile, the operating conditions of operators in a workshop are greatly improved; 2. the dust-containing flue gas is pumped by a draught fan, passes through the necking flue and the straight flue, then is downwards converged into the underground flue, and then enters the dust removal main pipeline. The design of the underground flue well solves the problem of interference on lifting of the steel ladle caused by arranging the flue on the ground or in the air, and the influence of technical improvement engineering on production is reduced to the minimum. 3. The dust collecting device adopts a side suction type structure, the side length is narrow, the dust collecting device is fixed on the edge of a ladle repairing pit, the occupied space is small, and the dust collecting device is convenient to arrange on site. The smaller occupied space reduces the influence on lifting and transporting of the steel ladle, the fixing on the edge of the ladle repairing pit opposite to the direction of the steel ladle opening is beneficial to collecting dust-containing smoke, and compared with the existing movable air suction cover, the fixed mode has the advantages that the track does not need to be built, the derailment and the like can not occur, meanwhile, the lower cost of the electrified equipment is reduced, the control is simple, the maintenance and the use are convenient, and the service life is longer.

Description of the drawings:

FIG. 1 is a schematic structural diagram of a ladle hot repair dust collecting device according to an embodiment of the present invention;

FIG. 2 is a schematic view of the ladle hot repair dust collection apparatus of FIG. 1 connected to a rear underground flue;

FIG. 3 is a schematic longitudinal sectional view of the ladle hot repair dust collector apparatus of FIG. 1 in an operating state;

fig. 4 is a front view of a ladle hot repair dust collecting device according to an embodiment of the present invention;

FIG. 5 is a view of the ladle hot repair dust collector of the embodiment of the present invention;

fig. 6 is a rear view of a ladle hot repair dust collecting device according to an embodiment of the present invention;

fig. 7 is a right side view of a ladle hot repair dust collecting device according to an embodiment of the present invention;

FIG. 8 is a structural view of a hydraulic push rod with a motor of a member 8 according to an embodiment of the present invention;

fig. 9 is an isometric view of a reduced flue for a piece 4 of an embodiment of the present invention.

In the drawings: 1. an upper wall plate; 2. a side plate; 3. a sloping plate; 4. a necking flue; 5. a straight flue; 6. movable plate turning; 7. a rotating shaft; 8. an electro-hydraulic push rod; 9. a baffle plate; 10. a base; 11. lifting lugs; 12. a refractory mortar layer; 13. a viewing port; 14. a ladle hot repair dust collection device; 15. an underground flue 16, a steel ladle 17 and a sliding water gap; 18. a crank link mechanism; 19. a motor; 20. a coupling; 21. an oil pump; 22. an oil circuit integrated block; 23. an access hole and a cover plate; 24 an oil drain pipe; 25. a piston rod; 26. a working oil cylinder; 27. an oil tank; 28. a seal assembly; 29. an oil tank base; H. hot flue gases; g. a ground reference plane.

The specific implementation mode is as follows:

the embodiments of the invention will be described in further detail below with reference to the accompanying drawings: the ladle hot repair dust collection device shown in fig. 1, 4-7 and 9 comprises an upper wall plate 1, a side plate 2, an inclined plate 3, a necking flue 4, a straight flue 5, a movable turning plate 6, a rotating shaft 7, an electro-hydraulic push rod 8, a baffle plate 9, a base 10, a lifting lug 11, refractory mortar 12 and an observation port 13 which are connected with each other; the lifting lugs 11 are welded in the middle of the upper wall plate 1 and in the upper middle of the side plate 2; the inclined plate 3 and the baffle 9 are welded on the inner side of the side plate 2, and the inclined plate 3 and the baffle 9 are welded; the necking flue 4 is welded with the upper wall plate 1, the side plate 2 and the inclined plate 3; the upper end of the straight flue 5 is welded with the necking flue 4, and the lower end of the straight flue 5 is connected with the underground flue 15 by adopting a flange bolt; the lower parts of the side plates 2 and the baffle 9 are welded with a base 10, and the base 10 is connected with the foundation ground by bolts; the movable turning plate 6 is connected with the electro-hydraulic push rod 8 through a crank connecting rod mechanism 18 and a rotating shaft 7; the rotating shaft 7 penetrates through two ends of the side plate 2 and is connected with the movable turning plate 6 and a crank link mechanism 18 of the electro-hydraulic push rod 8 through a pin shaft, and a base 29 of the electro-hydraulic push rod 8 is welded with the side plate 2 through a support; the refractory mortar layer 12 is laid on the baffle 9 and the inclined plate 3; the observation port 13 is arranged on the baffle 9 and the refractory mortar layer 12, and the adjustable angle of the movable turning plate 6 is 65 degrees. As shown in fig. 2 and 3, the relative positions and installation relations of the dust collecting device 14, the underground flue 15 and the ladle 16 during ladle hot repair are shown; the ladle hot repair dust collection device 14 is arranged in front of and above a flue gas outlet of a ladle 16; the ladle 16 is fixed on the ladle hot repair bench; a sliding water gap 17 is arranged on the ladle 16; the lower end of the straight flue 5 is connected with the underground flue 15 by adopting a flange bolt. As shown in fig. 8: the electro-hydraulic push rod 8 consists of a motor 19, a coupling 20, an oil pump 21, an oil circuit manifold block 22, an access cover plate 23, an oil discharge pipe 24, a piston rod 25, a working oil cylinder 26, an oil tank 27, a sealing assembly 28 and an oil tank base 29 which are connected with one another; the motor 19 is directly connected with the oil pump 21 through a coupling 20; two oil suction ports arranged on the oil pump 21 are communicated with two oil discharge pipes 24 arranged on the oil circuit manifold block 22; one of the two oil discharge pipes 24 arranged on the oil circuit manifold block 22 is communicated with a working oil cylinder 26; the other of the two oil discharge pipes of the oil circuit manifold block 22 is communicated with an oil tank 27; the oil tank 27 is provided with an access hole and a cover plate 23 at the position close to the oil circuit manifold block 22; a sealing assembly 28 is arranged at the working end of a piston rod 25 in the working oil cylinder 26; the working end of the piston rod 25 is connected with one end of the crank connecting rod mechanism 18; the other end of the crank connecting rod mechanism 18 is movably connected with the rotating shaft 7; the oil tank base 29 of the electro-hydraulic push rod 8 is welded on the side plate 2; the oil tank base 29 is fixedly connected with the side plate 2 through a bracket. Fig. 9 is an axial view of the throat tunnel 4. After the ladle hot repair dust collection device 14 is assembled and welded, the lifting lug 11 can be hung by a hanging belt of a crown block to be directly hung and transported to a ladle repair pit edge to be placed at the position of the opening part of a ladle 16, the transverse width of the dust collection cover covers the whole ladle opening height and exceeds about 1m of the inverted lying upper edge of the ladle, the smoke escape range can be effectively covered, the lateral direction is narrow, and the occupied space can be effectively saved, so that the influence on the crown block hoisting ladle is reduced. When the dust collection cover is provided with the movable turning plate 6, the movable turning plate 6 can be opened and closed within the range of 0-65 degrees through the electro-hydraulic push rod 8, the movable turning plate 6 can be quickly opened and closed within 10s to complete response, dust-containing smoke can be effectively prevented from overflowing, and the smoke collection efficiency is greatly improved. The baffle 9 surface covers the effectual life that has improved the steel sheet under the high temperature condition of chamotte 12, and baffle 9 is equipped with two viewing apertures, and the operation workman can observe the inside condition of ladle at the viewing aperture, also can stretch into the inside operation of repairing the package of oxygen-blast of ladle through the viewing aperture with the oxygen lance directly, and the baffle that covers this moment has chamotte 12 has played fine thermal-insulated and guard action, provides the guarantee for operation workman's safety. The steel ladle is opened the dust removal pipeline valve before the packet pit takes one's place and begins to blow oxygen and repair the package, controls the electro-hydraulic push rod 8 through the control box simultaneously and opens the dust collection cover activity version 6 and the biggest contained angle of dust collection cover reaches 65, and the dust collection cover is in operating condition this moment. During ladle hot repair, dust-containing hot flue gas rushes out from a ladle opening in an inclined upward manner and can collide with a baffle 9 protected by a refractory mud layer 12, the hot flue gas can flow upwards and is sucked into a necking flue 4 under the flow guide of an inclined plate 3, a side plate 2 and a movable turnover plate 5, the dust-containing flue gas enters an underground flue through a straight flue 5 after passing through the necking flue 4, the dust-containing flue gas enters a dust remover through a dust removal pipeline converging system under the action of an induced draft fan to filter and purify the flue gas, and the qualified dust-containing flue gas is discharged after reaching the standard. Meanwhile, waste residues sprayed from the ladle opening along with the flue gas sink to the ground under the blocking and gravity effects of the baffle 9, so that particles entering the dust collection flue are reduced, and the problem of too fast dust deposition in the flue is avoided. After the collection of the hot repair flue gas of the steel ladle is finished, a flue valve is closed, and meanwhile, the movable turnover plate 6 is retracted through the electro-hydraulic push rod 8, so that the influence on the hoisting of the steel ladle is avoided. The working principle of the electro-hydraulic push rod 8 is as follows: taking the piston rod 25 pushing forward (left) as an example: through the positive (reverse) rotation of the motor 19, one of the oil suction ports of the oil pump 21 sucks oil from the oil tank 27 and outputs pressure oil to the oil circuit manifold 22, then the pressure oil is sent to the rear end of the piston rod 25 through the oil discharge pipe 24 from one of the oil discharge ports of the oil circuit manifold 22, the piston rod 25 is driven to push forwards (leftwards) under the action of oil pressure, the oil in the working oil cylinder 26 is extruded out under pressure, and is sent back to the oil circuit manifold from the other oil discharge port of the oil circuit manifold 22 through the pipeline of the oil discharge pipe 24, and then the oil is discharged to the oil tank 27 from the other oil suction port of. The working principle of the movable plate-turning 6 is as follows: the crank-link mechanism 18 is driven to rotate by the reciprocating (left-right) movement of the piston rod 25, so that the rotating shaft 7 rotates to drive the movable turning plate 6 to rotate for an angle, and the dust collecting device enters a working state. The smoke inlet of the dust collection cover is provided with a movable turnover plate 6. The movable turning plate 6 consists of a rectangular main plate and two small triangular side plates. When the dust collection cover does not work, the main plate of the turning plate is vertical to the ground, the main plate and the side plate are both collected in the cover so as not to influence the lifting of the ladle, after the ladle falls down, the dust collection cover starts to work, and the movable turning plate 6 is outwards opened by 0-65 degrees. Compared with the traditional side suction hood, the movable turning plate 6 blocks the rapid upward path of the hot flue gas and forms flow guide, and the flow guide effect of the inclined plate 3 and the suction force of the dust collection hood are added, so that the dust collection hood can collect the hot flue gas to the maximum extent. The smoke emission state is as follows: the hot flue gas containing dust from the hot repair ladle 16 enters a dust collection cover of a ladle hot repair dust collection device 14 under the flow guidance of the inclined plate 3 and the movable turnover plate 6, then is connected into an underground flue 15 through a necking flue 4 and a straight flue 5, and finally enters a dust removal system to remove dust and then is discharged after reaching the standard. The upper wall plate 3 is provided with a section of circular arc, and one side edge of the necking flue 4 is shared with the inclined plate 3. The flow guide effect of the smoke dust is improved, and the smoke dust in the dust removal device is mixed uniformly to the maximum extent.

Claims (4)

1. A ladle hot repair dust collection device comprises a straight flue (5) and a base (10); the device is characterized by also comprising an upper wall plate (1), a side plate (2), an inclined plate (3), a movable turning plate (6), a necking flue (4), a rotating shaft (7), an electro-hydraulic push rod (8), a baffle plate (9), a lifting lug (11) and an observation port (13); the external frame of the ladle hot repair dust collection device (14) is formed by connecting an upper wall plate (1) with a rear wall plate, a left side plate, a right side plate (2), a front baffle plate (9), an inclined plate (3), a movable turning plate (6) movably connected with the upper wall plate (1) through a rotating shaft (7) and an electro-hydraulic push rod (8); the flue gas pipeline in the ladle hot repair dust collection device (14) is formed by welding an inclined plate (3), a necking flue (4) and a straight flue (5); the lifting lugs (11) are welded in the middle of the top of the upper wall plate (1) and in the middle of the upper parts of the two side plates (2); a refractory mud layer (12) is built by the diversion sloping plate (3) and the baffle plate (9) which are close to the ladle side; two observation ports (13) are arranged on the front baffle (9) and the fireproof mud layer (12); the upper end of a straight flue (5) of the ladle hot repair dust collection device (14) is welded with the necking flue (4), and the lower end of the straight flue (5) is communicated with an underground flue (15); a sliding water gap (17) is arranged on the ladle (16); the ladle hot repair dust collection device (14) is arranged in front of and above a flue gas outlet of the ladle (16); the ladle (16) is fixed on the ladle hot repair rack; the lower parts of the upper wall plate (1), the side plates (2) and the baffle (9) are fixedly connected with the base (10); the base (10) is in threaded connection with the ground reference surface (g); the electro-hydraulic push rod (8) consists of a motor (19), a coupler (20), an oil pump (21), an oil circuit manifold block (22), an access hole cover plate (23), an oil discharge pipe (24), a piston rod (25), a working oil cylinder (26), an oil tank (27), a sealing assembly (28) and an oil tank base (29) which are connected with one another; the motor (19) is directly connected with the oil pump (21) through a coupling (20); two oil suction ports arranged on the oil pump (21) are communicated with two oil discharge pipes (24) arranged on the oil circuit manifold block (22); one of the two oil discharge pipes (24) arranged on the oil circuit manifold block (22) is communicated with the working oil cylinder (26); the other of the two oil discharge pipes of the oil circuit manifold block (22) is communicated with an oil tank (27); an access hole and a cover plate (23) are arranged on the oil tank (27) close to the oil circuit manifold block (22); a sealing assembly (28) is arranged at the working end of a piston rod (25) in the working oil cylinder (26); the working end of the piston rod (25) is connected with one end of the crank connecting rod mechanism (18); the other end of the crank connecting rod mechanism (18) is movably connected with the rotating shaft (7); an oil tank base (29) of the electro-hydraulic push rod (8) is welded on the side plate (2); the oil tank base (29) is fixedly connected with the side plate (2) through a support, and the adjustable angle of the movable turning plate (6) is 0-65 degrees.

2. The ladle hot repair dust collecting device according to claim 1, characterized in that: the inclined plate (3) and the baffle plate (9) are welded on the inner side of the side plate (2), and the inclined plate (3) and the baffle plate (9) are fixedly connected; the necking flue (4) is fixedly connected with the upper wall plate (1), the side plate (2) and the inclined plate (3).

3. The ladle hot repair dust collecting device according to claim 1, characterized in that: the upper end of the straight flue (5) is welded with the necking flue (4), and the lower end of the straight flue (5) is communicated with the underground flue (15) by adopting flange bolts.

4. The ladle hot repair dust collecting device according to claim 1, characterized in that: the baffle (9) and the sloping plate (3) which plays a role of flue gas flow guiding are arranged at the flue gas outlet of the ladle (16).

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