System for steam recovery and white elimination of blast furnace granulated slag filter tank and working method of system
By using a steam collection device with self-heavy unloading flap and a driving mechanism moving in the blast furnace slag filter tank, the equipment damage caused by slag backlog is solved, the effective recycling of steam and the improvement of the working environment is achieved, and the green environment is achieved. The factory provides equipment guarantee.
Patent Information
- Application Number
- CN202411258194.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-09
- Publication Date
- 2024-12-27
AI Technical Summary
In the blast furnace slag filter tank, the mobile steam collection device is easily damaged by the backlog of slag particles in the grab bucket, resulting in ineffective steam collection and affecting the stability of the equipment and operating environment.
The self-heavy discharge flip plate is used on the top of the mobile steam collection device. The slag particles fall into the filter tank through its own gravity and impact force to avoid slag collapse and equipment damage. The steam collection device is moved through the driving mechanism to move the steam collection device in different partition tanks. switch between the two sides to achieve effective steam recovery.
It effectively avoids damage to the steam collection device, improves the stability of the equipment and the safety of the working environment, and achieves the goal of efficient steam recycling and green factory.
Smart Images
Figure CN119193943A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of blast furnace water slag flushing, in particular to a system for steam recovery and descaling of blast furnace water slag filtering pool, and also to a working method of the system for steam recovery and descaling of blast furnace water slag filtering pool. Background Art
[0002] High-temperature liquid slag is the main by-product of blast furnace smelting, with extremely high solid waste resource recycling value and economic benefits. At present, the mainstream slag treatment method for domestic and foreign steel enterprises is the water slag flushing process. The slag is crushed and quenched by high-speed water flow, turning it into a loose slag-water mixture (hereinafter referred to as water slag), which flows into the filter tank through the slag flushing ditch. The liquid water is filtered through the filter layer in the filter tank, leaving solid and wet slag particles on the top of the filter material, and then the slag particles are grabbed by a bridge grab crane and transported by car or belt.
[0003] Liquid slag has a high temperature (1350℃-1500℃). A large amount of slag continues to undergo intense heat transfer during the water quenching and granulation process, generating a large amount of steam. Especially in winter, when the ambient temperature is low and the ambient temperature difference is large, more steam is generated. In order to prevent the generated steam from escaping and being directly discharged, a steam collection device is installed on the top of the filter tank. However, during the slag grabbing process, the slag particles in the grab bucket will fall, and the slag accumulation on the top of the steam collection device is relatively serious. The equipment structure is easily damaged, and the steam cannot be effectively collected.
[0004] Specifically, Figure 1 As shown, the existing filter pool 3 includes a first sub-pool 31 and a second sub-pool 32 arranged on the left and right, and the filter pool 3 also includes a mobile steam collecting device 4, which can move left and right on the first sub-pool 31 and the second sub-pool 32. A slag collecting bucket 33 is arranged on the right side of the second sub-pool 32. When the intelligent slag grabbing overhead crane 5 grabs the slag particles in the first sub-pool 31 and transports them to the slag collecting bucket 33, the slag particles in the intelligent slag grabbing overhead crane 5 will be spilled onto the mobile steam collecting device 4 on the second sub-pool 32. After long-term operation, the top of the mobile steam collecting device 4 will have serious slag accumulation and will be easily crushed. Summary of the invention
[0005] In order to solve the problem that the slag particles scattered by the overhead crane grab bucket for a long time are easy to crush the mobile steam collection hood, the present invention provides a system for steam recovery and descaling of blast furnace slag filter tank and a working method thereof, the system for steam recovery and descaling of blast furnace slag filter tank comprises a self-weight unloading type flap, and the slag particles falling on the self-weight unloading type flap can cause the self-weight unloading type flap to rotate and fall into the filter tank, which can avoid the situation that the mobile steam collection hood is easily crushed by the accumulated slag, and also improve the working environment of the blast furnace slag area, providing equipment guarantee for realizing a green factory.
[0006] The technical solution adopted by the present invention to solve its technical problem is:
[0007] A system for steam recovery and descaling in a blast furnace slag filter pool comprises a granulation tower, a slag flushing ditch, a filter pool and a mobile steam collecting device arranged in sequence, the filter pool comprises a first sub-pool and a second sub-pool arranged on the left and right, the mobile steam collecting device comprises a supporting frame, a top sealing cover and a driving mechanism, the top sealing cover comprises a plurality of sealing areas, each sealing area comprises a plurality of self-weight unloading type flaps, the self-weight unloading type flaps are connected to the supporting frame via a rotating shaft, the rotating shaft is in a horizontal state, the self-weight unloading type flaps can rotate around the rotating shaft, and the driving mechanism can drive the mobile steam collecting device to move left and right on the first sub-pool and the second sub-pool.
[0008] A working method of the above-mentioned blast furnace slag filter tank steam recovery and descaling system comprises the following steps:
[0009] Step 1: The control system of the steam recovery and descaling system of the blast furnace slag filtration pool sends an interlocking control command, the mobile steam collecting device moves rightward to the second sub-pool, the mobile steam collecting device closes the upper end of the second sub-pool, and the water slag flushing production operation starts. The slag-water mixture in the granulation tower enters the second sub-pool through the slag flushing ditch and the slag-water conveying device in turn, the intelligent slag grabbing crane grabs the slag particles in the first sub-pool and transports them to the slag particle collection bucket; the slag particles scattered by the intelligent slag grabbing crane fall on any piece of self-weight unloading flip After the slag particles are on the self-weight unloading flap, they can rely on their own gravity and impact force to rotate the self-weight unloading flap, and after the self-weight unloading flap rotates, the slag particles on the self-weight unloading flap fall into the second sub-pool; or, after the slag particles scattered by the intelligent slag grabbing overhead crane fall on any self-weight unloading flap, the slag particles move along the inclined direction of the left plate or the right plate, and slide to the intersection of the two adjacent self-weight unloading flaps, and the two adjacent self-weight unloading flaps deflect to form a gap, so that the collected slag particles fall into the second sub-pool;
[0010] Step 2: The control system of the steam recovery and desmoking system of the blast furnace slag filter pool issues an interlocking control command, the mobile steam collecting device moves leftward to the first sub-pool, the mobile steam collecting device closes the upper end of the first sub-pool, and the water slag flushing production operation starts. The slag-water mixture in the granulation tower enters the first sub-pool through the slag flushing ditch and the slag-water conveying device in turn, and the intelligent slag grabbing crane grabs the slag particles in the second sub-pool and transports them to the slag particle collection bucket;
[0011] Step 3: Repeat steps 1 and 2 above.
[0012] The beneficial effects of the present invention are as follows: the steam recovery and descaling system of the blast furnace slag filter tank contains a self-weight unloading type flap, and the slag particles scattered by the overhead crane grab bucket fall on the self-weight unloading type flap, which can cause the self-weight unloading type flap to rotate and fall into the filter tank, thereby avoiding the steam collection device being easily crushed by accumulated slag and easily damaged by collision with the crane grab bucket. The scheme has the advantages of more feasible scheme, more stable and reliable operation, faster and more convenient maintenance, etc., which improves the working environment of the blast furnace slag area and provides equipment guarantee for realizing a green factory. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] The drawings in the specification, which constitute a part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.
[0014] Figure 1 It is a schematic top view of a filter tank in the prior art.
[0015] Figure 2 It is a main schematic diagram of the system for steam recovery and descaling in the blast furnace slag filter tank according to the present invention.
[0016] Figure 3 It is a left-side schematic diagram of the system for steam recovery and descaling in the blast furnace slag filter tank according to the present invention.
[0017] Figure 4 It is a top view schematic diagram of the system for steam recovery and descaling in the blast furnace slag filter tank of the present invention.
[0018] Figure 5 Schematic diagram of a top view of a mobile steam collection device.
[0019] Figure 6 yes Figure 5 A magnified schematic diagram of area A in the middle.
[0020] Figure 7 It is a left side view schematic diagram of the support frame.
[0021] Figure 8 It is a three-dimensional schematic diagram of the support frame.
[0022] Fig. 9 It is a schematic diagram of a self-weight unloading flap.
[0023] Fig.10 It is a schematic diagram of the working status of the self-weight unloading flap.
[0024] Description of reference numerals:
[0025] 1. Granulation tower; 2. Slag flushing ditch; 3. Filter tank; 4. Mobile steam collection device; 5. Intelligent slag grabbing crane; 6. Air duct; 7. Drainage device; 8. Cooling tower; 9. Slag particles;
[0026] 11. Slag flushing device; 12. Slag channel; 13. Condensing spray device; 14. Outlet device;
[0027] 21. Slag-water conveying device;
[0028] 31. First sub-pool; 32. Second sub-pool; 33. Slag particle collection hopper; 34. Liquid level monitoring device;
[0029] 41. Support frame; 42. Driving mechanism; 43. Top cover;
[0030] 61. Electric valve;
[0031] 71. Water pump;
[0032] 411. Bottom frame; 412. Cross beam; 413. Longitudinal beam; 414. Cover installation area; 415. Installation cross bar; 416. Installation column; 417. Bearing seat;
[0033] 431. Cover area; 432. Self-weight discharging type flap; 433. Rotating shaft; 434. Bearing; 435. Front side plate; 436. Rear side plate; 437. Left side plate; 438. Right side plate. Detailed implementation manners
[0034] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the drawings and in combination with the embodiments.
[0035] For the convenience of understanding and description, absolute positional relationships are adopted in the following description of the present invention. Without special explanation, the orientation word "up" represents Figure 3 the upper side direction in Figure 3 the lower side direction in Figure 3 the left side direction in Figure 3 the right side direction in Figure 3 the "front" orientation word represents the direction perpendicular to Figure 3 the paper surface of
[0036] and pointing to the inside of the paper surface, and the orientation word "rear" represents the direction perpendicular to Figures 2 to 6As shown, a system for steam recovery and descaling in a blast furnace slag filter pool described in an embodiment of the present invention comprises a granulation tower 1, a slag flushing ditch 2, a filter pool 3 and a mobile steam collecting device 4 arranged in sequence, the filter pool 3 comprises a first sub-pool 31 and a second sub-pool 32 arranged on the left and right, the mobile steam collecting device 4 comprises a supporting frame 41, a top sealing cover 43 and a driving mechanism 42, the top sealing cover 43 comprises a plurality of sealing areas 431, each sealing area 431 comprises a plurality of self-weight unloading type flaps 432, the self-weight unloading type flaps 432 are connected to the supporting frame 41 via a rotating shaft 433, the rotating shaft 433 is in a horizontal state, the self-weight unloading type flaps 432 can rotate around the rotating shaft 433, and the driving mechanism 42 can drive the mobile steam collecting device 4 to move in the left and right directions on the first sub-pool 31 and the second sub-pool 32.
[0037] like Figures 4 to 10 As shown, the steam recovery and descaling system of the blast furnace slag filter pool contains a plurality of self-weight unloading flaps 432. After the slag particles 9 fall on the self-weight unloading flaps 432, the slag particles 9 can cause the self-weight unloading flaps 432 to rotate, and the slag particles 9 can fall into the filter pool, which can prevent the steam recovery and descaling system of the blast furnace slag filter pool from being easily crushed by accumulated slag, and also improve the working environment of the blast furnace slag area, providing equipment guarantee for realizing a green factory.
[0038] The support frame 41 can select a steel structure beam of a suitable size according to the size of a single filter tank. The top cover 43 contains multiple cover areas 431 arranged along the front-to-back direction. The support frame 41 contains a bottom frame 411. The bottom frame 411 is a rectangular structure. The bottom frame 411 contains a crossbeam 412 and a longitudinal beam 413. The crossbeam 412 extends in the left-right direction, and the longitudinal beam 413 extends in the front-to-back direction. The two longitudinal beams 413 are arranged in parallel and spaced apart on the left and right. Multiple crossbeams 412 are located between the two longitudinal beams 413. Multiple crossbeams 412 are spaced apart in the front-to-back direction. The left and right ends of the crossbeam 412 are correspondingly connected and fixed to the two longitudinal beams 413. A cover installation area 414 is formed between two adjacent crossbeams 412.
[0039] like Figures 4 to 8 As shown, each enclosure area 431 includes a plurality of self-weight unloading flaps 432 arranged in the left-right direction, and the enclosure area 431 corresponds to the enclosure installation area 414 one by one. For example, the enclosure area 431 and the enclosure installation area 414 each include 7 flaps. An installation crossbar 415 is arranged above the crossbeam 412, and the installation crossbar 415 extends in the left-right direction. The installation crossbar 415 is arranged vertically parallel to the crossbeam 412, and the installation crossbar 415 is connected and fixed to the crossbeam 412 through installation columns 416, and a plurality of installation columns 416 are arranged at intervals in the left-right direction.
[0040] Each mounting cross bar 415 is provided with a plurality of bearing seats 417, which are arranged at intervals in the left-right direction, and each enclosure area 431 contains a plurality of rotating shafts 433. In each enclosure area 431, the self-weight unloading flap 432 and the rotating shaft 433 are connected one by one, and each self-weight unloading flap 432 can be removed separately. The rotating shaft 433 extends in the front-back direction, and the end of the rotating shaft 433 is connected to the bearing seat 417 through a bearing 434.
[0041] In order to ensure that the steam collection device can be used for a long time in the water-slag environment and has structural stability, the self-weight unloading flap 432 should be made of acid-resistant, alkali-resistant, and high-temperature-resistant (such as 100°C) materials, such as fiberglass. Fig. 9 As shown, the self-weight unloading type flap 432 is roughly in the shape of a pointed roof (or an arch bridge), and the self-weight unloading type flap 432 includes a front side panel 435, a rear side panel 436, a left side panel 437 and a right side panel 438. The front side panel 435 and the rear side panel 436 are spaced apart from each other, the left side panel 437 and the right side panel 438 are located between the front side panel 435 and the rear side panel 436, the left side panel 437 and the right side panel 438 are connected to form an inverted V-shaped structure, and the angle between the left side panel 437 and the right side panel 438 can be 110°-160°.
[0042] The front side panel 435 and the rear side panel 436 are both triangular in shape, and are symmetrical front to back and mirror images of each other. The front end of the left side panel 437 and the front end of the right side panel 438 are both matched and sealed with the upper side edge of the front side panel 435, the rear end of the left side panel 437 and the rear end of the right side panel 438 are both matched and sealed with the upper side edge of the rear side panel 436, and the upper end of the left side panel 437 and the upper end of the right side panel 438 are matched and sealed.
[0043] The self-weight unloading flap 432 is connected and fixed to the rotating shaft 433, and the rotating shaft 433 passes through the front side plate 435 and the rear side plate 436 of the self-weight unloading flap 432. The tip of the self-weight unloading flap 432 faces upward, and the opening of the self-weight unloading flap 432 faces downward. The left side plate 437 and the right side plate 438 can be symmetrical and mirror images of each other. Alternatively, in order to make it easier to rotate the self-weight unloading flap 432 after the slag particles 9 fall on the self-weight unloading flap 432, the length of the left side plate 437 in the left-right direction can be greater than the length of the right side plate 438.
[0044] In order to make the steam recovery and descaling system of the blast furnace slag filter tank have better sealing performance, the lower ends of the two adjacent self-weight unloading flaps 432 on the left and right are matched, and the lower ends of the self-weight unloading flaps 432 are matched with the adjacent crossbeams 412 in front and behind. The lower edge of the self-weight unloading flap 432 is provided with a sealing strip, and the sealing strips of the two adjacent self-weight unloading flaps 432 on the left and right can rub against each other, and the sealing strip of one self-weight unloading flap 432 can rub against the crossbeam 412 of the adjacent bottom frame 411.
[0045] Preferably, the sealing strip can be a sealing brush strip or a sealing felt strip. The sealing brush strip or the sealing felt strip can ensure that the self-weight unloading type flap 432 has a good sealing effect during the rotation process, and can also avoid the excessive friction resistance caused by the use of rubber sealing strips, which is not conducive to the slag particles 9 making the self-weight unloading type flap 432 inflexible in rotation due to insufficient gravity.
[0046] The support frame 41 is connected to the bottom with (four) wheels and a multi-layer sealing component. The wheels can be connected and fixed to the support frame 41 by bolts. The driving mechanism 42 can drive the support frame 41 to move in the left and right directions. The multi-layer sealing component (also called a sealing curtain) is a rectangular structure. The support frame 41 and the multi-layer sealing component are matched and connected up and down. The multi-layer sealing component can ensure that the support frame 41 is sealed and connected to the filter tank. It is ensured that the steam collection device can also ensure the sealing effect and service life even when there is a movement error.
[0047] The driving mechanism 42 can use an existing motor, which can drive the wheels to rotate, and the driving mechanism 42 is connected and fixed to the support frame 41. In order to ensure the stability and smoothness of the equipment during translation, the motors are arranged on the opposite sides as much as possible, with two motors being preferably installed above the support frame 41 of the steam collection device. Rails are provided on the first sub-tank 31 and the second sub-tank 32, and the rails can be used to move the steam collection device 4 left and right on the first sub-tank 31 and the second sub-tank 32. The mobile steam collection device 4 can close the upper end of the first sub-tank 31 or the upper end of the second sub-tank 32, thereby achieving full closure of the filter tank and "zero emission" of steam.
[0048] like Figures 2 to 4 As shown, the granulating tower 1 is connected with a slag punching device 11 and an outlet device 14 , the granulating tower 1 contains a condensation spraying device 13 , the slag ditch 12 is connected with the inlet of the granulating tower 1 , and the slag punching device 11 is located directly below the slag ditch 12 .
[0049] The slag flushing device 11 is located below the slag ditch 12. The slag flushing device 11 is externally connected to a slag flushing water pipeline, and its main function is to divide the water flow column in the pipeline into multiple water flow beams. The slag flushing device 11 and the slag ditch 12 extend into the granulation tower 1 as a whole. The granulation tower 1 mainly completes the punching operation of high-temperature slag and the condensation recovery of steam. In order to reduce the amount of saturated steam in the high-temperature steam, a condensation spray device 13 can be added inside the granulation tower 1, above the slag flushing point, to condense the high-temperature saturated steam and reduce its water vapor content. At the same time, the relatively sealed granulation tower 1 also provides necessary conditions for safe production.
[0050] The steam recovery and desmoking system of the blast furnace slag filter pool also includes an air duct 6, an intelligent slag grabbing crane 5 and a slag particle collecting bucket 33. The air duct 6 can transport the steam in the first sub-tank 31 and the second sub-tank 32 to the granulation tower 1. The air duct 6 is provided with an electric valve 61. The outlet device 14 can transport the slag-water mixture in the granulation tower 1 into the slag flushing ditch 2. The outlet end of the slag flushing ditch 2 is connected to the slag-water conveying device 21.
[0051] The air duct 6 is set up between the filter pool 3 and the granulation tower 1. The steam generated by the filter pool 3 during operation is uniformly recovered to the granulation tower 1 through the air duct 6 for uniform condensation treatment. In order to ensure that the slag-water mixture does not flow into the air duct and the steam is uniformly recovered and treated, when an interface is set on the side wall of the filter pool 3, the interface of the air duct 6 should be higher than the maximum water level in the filter pool 3; the condensation spray device 13 should be set as far as possible in the granulation tower 1.
[0052] The slag-water conveying device 21 can convey the slag-water mixture in the slag flushing ditch 2 into the first sub-tank 31 or the second sub-tank 32 , the intelligent slag grabbing overhead crane 5 can perform slag grabbing operations on the first sub-tank 31 or the second sub-tank 32 , and the slag particle collecting bucket 33 is located directly on the right side of the filter tank 3 .
[0053] In order to ensure the smooth flow of the slag-water mixture, the slag flushing ditch 2 should be guaranteed to have a certain slope. On the one hand, the slag-water conveying device 21 is used to convey the slag-water mixture into the interior of the filter tank 3, and on the other hand, it can also realize the switching function between adjacent filter tanks. When the slag-water capacity in the first sub-tank 31 reaches the maximum volume that can be accommodated, the slag-water mixture can be guided to the second sub-tank 32 through hydraulic control.
[0054] During the water slag flushing operation, the slag-water mixture flows along the slag flushing ditch 2 and the slag water conveying device 21 into the filter pool 3, and the slag-water separation is completed in the filter pool 3. The inlet of the slag water conveying device 21 is connected with the outlet of the slag flushing ditch 2, and the outlet of the slag water conveying device 21 can be connected with the first sub-pool 31 or the second sub-pool 32. Generally, in order to ensure the continuous production of the water slag flushing process, the filter pool 3 is composed of 2 or more adjacent filter pools. When the slag water load in a filter pool reaches the maximum capacity, the slag water conveying device 21 can be hydraulically controlled to lead the slag-water mixture to the remaining filter pools to realize the switching function between adjacent filter pools. The intelligent slag grabbing crane 5 is mainly used to transport the solid slag particles in the filter pool 3 to the collecting bucket, and use a car or a slag conveyor belt to realize the subsequent resource processing of the slag particles.
[0055] like Figures 2 to 4 As shown, the steam recovery and descaling system of the blast furnace slag filter pool also includes a liquid level monitoring device 34, a drainage device 7, a cooling tower 8 and a control system. The liquid level monitoring device 34 is located in the first sub-tank 31 and the second sub-tank 32. The liquid level monitoring device 34 can monitor the liquid level in the first sub-tank 31 and the second sub-tank 32 in real time. The filtered water in the first sub-tank 31 and the second sub-tank 32 is discharged through the drainage device 7. The drainage device 7 is connected to the cooling tower 8 through a drainage pipe. A water pump 71 is provided on the drainage pipe. The control system can control the operation of the steam recovery and descaling system of the blast furnace slag filter pool. The slag flushing water is recycled through the drainage pipe, the water pump 71 and the cooling tower 8, and is pumped back to the slag flushing device 11 through the water pump.
[0056] The drainage device 7 is placed at the bottom of the filter pool 3, and filter media of different particle sizes can be laid on the drainage device 7. The slag-water mixture is physically filtered, and the slag particles are left on the surface of the filter medium. The slag-washing water passes through the filter medium and is discharged along the drainage device 7, realizing the physical separation of solid slag particles and liquid water. The particle size selection of the filter medium is related to the size of the slag particles. The principle to be followed is: the particle size of the top filter medium must be smaller than the diameter of the slag particles to ensure that the slag particles can be retained on the top of the filter medium.
[0057] The main media stored in the filter pool 3 are: a mixture of solid slag particles and liquid water (i.e., the filtering operation has not started in the pool), and solid slag particles (i.e., the liquid water in the pool has been filtered out). The water level in the filter pool 3 is the key to ensuring that the high-temperature slag flushing water does not overflow and to achieve safe slag flushing production. During the slag flushing operation, the mobile steam collection device 4 and the filter pool 3 form a closed space, so a liquid level monitoring device 34 must be set to observe the liquid level in real time.
[0058] The working process of the steam recovery and descaling system of the filter tank and blast furnace slag filter tank is introduced below.
[0059] Step 1: When the blast furnace meets the conditions for iron tapping, the blast furnace water slag flushing system issues an interlocking control command, the drive mechanism 42 works, the mobile steam collecting device 4 moves rightward to the second sub-tank 32, the mobile steam collecting device 4 closes the upper end of the second sub-tank 32, and the drive mechanism 42 stops working. After the mobile steam collecting device 4 stops, a stop position command is issued, and at the same time, the staff sends a control signal to the slag flushing control room to start the water slag flushing production operation, and the control system turns on the slag flushing signal. The slag flushing water electric valve and the valve of the slag flushing ditch 2 are opened, and the outlet of the slag water conveying device 21 is rotated so that the outlet of the slag water conveying device 21 is connected to the second sub-tank 32, and the high-temperature liquid slag enters the granulation tower 1 through the slag ditch 12. The slag is quenched and granulated to form a slag-water mixture. The slag-water mixture in the granulation tower 1 passes through the slag flushing ditch 2 and the slag water conveying device 21 and enters the second sub-tank 32 in turn. After the slag flushing command for the second sub-tank 32 is issued, the first sub-tank 31 starts the slag grabbing process synchronously, that is, the intelligent slag grabbing crane 5 grabs the slag particles in the first sub-tank 31 and transports them to the slag particle collection bucket 33, and then transports them away by belt or car to realize the outward transportation of slag particles. After the slag particles 9 scattered by the intelligent slag grabbing crane 5 fall on any self-weight unloading flap 432, the slag particles 9 can rely on their own gravity and impact force to rotate the self-weight unloading flap 432, and after the self-weight unloading flap 432 rotates, the slag particles 9 on the self-weight unloading flap 432 can fall into the second sub-tank 32.
[0060] Alternatively, after the slag particles 9 spilled by the intelligent slag grabbing crane 5 fall on any self-weight unloading flap 432, the slag particles 9 move along the inclined direction of the left plate 437 or the right plate 438 and slide to the junction of two adjacent self-weight unloading flaps 432. If the amount of spilled slag particles 9 collected is large enough, a large pressure will be generated, and the two adjacent self-weight unloading flaps 432 will deflect and form a gap, so that the collected slag particles 9 fall into the second sub-pool 32, realizing the automatic slag unloading function of the steam collection device and avoiding the possibility of damage to the device structure. At the same time, the self-weight unloading flaps 432 that are independent of each other also provide a solid guarantee for the rapid maintenance of the steam collection device.
[0061] In addition, anti-collision steel columns can also be added to prevent the grab bucket of the slag grab crane from colliding with the steam collection device and causing damage due to manual operating errors or automated failures of the slag grab crane.
[0062] Step 2: When the blast furnace meets the conditions for iron-making, the blast furnace water slag flushing system issues an interlocking control command, the driving mechanism 42 works, the steam recovery and descaling system of the blast furnace water slag filter pool moves to the left to the first sub-pool 31, the steam recovery and descaling system of the blast furnace water slag filter pool closes the upper end of the first sub-pool 31, and the driving mechanism 42 stops working. After the steam recovery and descaling system of the blast furnace water slag filter pool stops, a stop position command is issued, and at the same time, the staff sends a control signal to the slag flushing control room to start the water slag flushing production operation, and the control system starts the slag flushing signal. The slag flushing water electric valve and the slag flushing ditch valve are opened, and the outlet of the slag water conveying device 21 rotates, so that the outlet of the slag water conveying device 21 is connected with the first sub-pool 31, and the high-temperature liquid slag enters the granulation tower 1 through the slag ditch 12, and the slag water is quenched and granulated to form a slag-water mixture. The slag-water mixture in the granulation tower 1 enters the first sub-pool 31 through the slag flushing ditch 2 and the slag water conveying device 21 in turn. After the slag flushing command is issued to the first sub-pool 31, the second sub-pool 32 starts the slag grabbing process synchronously, that is, the intelligent slag grabbing overhead crane 5 grabs the slag particles in the second sub-pool 32 and transports them to the slag particle collection bucket 33, and then transports them away by belt or car to realize the outward transportation of the slag particles.
[0063] Step three, the above steps one and two can be repeated in sequence as needed to achieve continuous operation. Observing the water level information in the first sub-tank 31 and the second sub-tank 32 is the key to switching the working filter tank and the system process control. In order to ensure that the water level in the filter tank is lower than the filter tank wall during the water slag flushing process, a scanning device or a camera device can be added to the steam recovery and descaling system of the blast furnace slag filter tank, the first sub-tank 31 and the second sub-tank 32 to measure the water level in the first sub-tank 31 and the second sub-tank 32 in real time and dynamically during the slag flushing process.
[0064] The above is only a specific embodiment of the present invention, and cannot be used to limit the scope of the invention. Therefore, the replacement of equivalent components, or equivalent changes and modifications made according to the protection scope of the present invention should still fall within the scope of the present invention. In addition, the technical features in the present invention can be freely combined with each other, with technical features and technical solutions, and with technical solutions.
Claims
1. A system for steam recovery and descaling in a blast furnace slag filter tank, characterized in that: The steam recovery and descaling system of the blast furnace slag filter pool comprises a granulation tower (1), a slag flushing ditch (2), a filter pool (3) and a mobile steam collecting device (4) which are arranged in sequence. The filter pool (3) comprises a first sub-pool (31) and a second sub-pool (32) which are arranged on the left and right. The mobile steam collecting device (4) comprises a support frame (41), a top sealing cover (43) and a driving mechanism (42). The top sealing cover (43) comprises a plurality of sealing areas (431). Each sealing area (431) comprises a plurality of self-weight unloading type flaps (432). The self-weight unloading type flaps (432) are connected to the support frame (41) via a rotating shaft (433). The rotating shaft (433) is in a horizontal state. The self-weight unloading type flaps (432) can rotate around the rotating shaft (433). The driving mechanism (42) can drive the mobile steam collecting device (4) to move left and right on the first sub-pool (31) and the second sub-pool (32).
2. The system for steam recovery and descaling in blast furnace slag filter pool according to claim 1, characterized in that: The top cover (43) includes a plurality of cover areas (431) arranged in the front-to-back direction, the support frame (41) includes a bottom frame (411), the bottom frame (411) includes a crossbeam (412) and a longitudinal beam (413), the crossbeam (412) extends in the left-right direction, the longitudinal beam (413) extends in the front-to-back direction, the two longitudinal beams (413) are arranged at intervals in the left-right direction, the plurality of crossbeams (412) are located between the two longitudinal beams (413), the plurality of crossbeams (412) are arranged at intervals in the front-to-back direction, and a cover installation area (414) is formed between two adjacent crossbeams (412).
3. The system for steam recovery and descaling in blast furnace slag filter pool according to claim 2, characterized in that: Each enclosure area (431) includes a plurality of self-weight unloading flaps (432) arranged in the left-right direction. The enclosure area (431) corresponds to the enclosure installation area (414) one by one. A mounting crossbar (415) is arranged above the crossbeam (412). The mounting crossbar (415) is arranged vertically parallel to the crossbeam (412). The mounting crossbar (415) is connected and fixed to the crossbeam (412) via a mounting column (416).
4. The system for steam recovery and descaling in blast furnace slag filter pool according to claim 3, characterized in that: A plurality of bearing seats (417) are arranged on each mounting cross bar (415), and the plurality of bearing seats (417) are arranged at intervals in the left-right direction. The rotating shaft (433) extends in the front-back direction, and the end of the rotating shaft (433) is connected to the bearing seat (417) through a bearing (434).
5. The system for steam recovery and descaling in blast furnace slag filter pool according to claim 1, characterized in that: The self-weight unloading flap (432) is in the shape of a pointed roof. The self-weight unloading flap (432) comprises a front side panel (435), a rear side panel (436), a left side panel (437) and a right side panel (438). The front side panel (435) and the rear side panel (436) are arranged with a front-to-back spacing. The left side panel (437) and the right side panel (438) are located between the front side panel (435) and the rear side panel (436). The left side panel (437) and the right side panel (438) are connected to form an inverted V-shaped structure.
6. The system for steam recovery and descaling in blast furnace slag filter pool according to claim 5, characterized in that: The front side plate (435) and the rear side plate (436) are both triangular in shape, symmetrical in front and back and mirror images of each other, the front end of the left side plate (437) and the front end of the right side plate (438) are both matched and connected to the upper side edge of the front side plate (435), and the rear end of the left side plate (437) and the rear end of the right side plate (438) are both matched and connected to the upper side edge of the rear side plate (436).
7. The system for steam recovery and descaling in blast furnace slag filter pool according to claim 5, characterized in that: The self-weight unloading type flap (432) is connected and fixed to the rotating shaft (433), the opening of the self-weight unloading type flap (432) faces downward, and a sealing strip is arranged at the lower edge of the self-weight unloading type flap (432). The sealing strips of two self-weight unloading type flaps (432) adjacent to each other can rub against each other, and the sealing strip of one self-weight unloading type flap (432) can rub against the bottom frame (411).
8. The system for steam recovery and descaling in blast furnace slag filter pool according to claim 1, characterized in that: The granulation tower (1) is connected to a slag flushing device (11) and an outlet device (14). The granulation tower (1) contains a condensation spray device (13). The steam recovery and descaling system of the blast furnace slag filter pool also includes an air bleed pipe (6) and an intelligent slag grabbing crane (5). The air bleed pipe (6) can convey the steam in the first sub-tank (31) and the second sub-tank (32) to the granulation tower (1). An electric valve (61) is arranged on the air bleed pipe (6). The outlet device (14) can convey the slag-water mixture in the granulation tower (1) into the slag flushing ditch (2). The outlet end of the slag flushing ditch (2) is connected to a slag-water conveying device (21). The slag-water conveying device (21) can convey the slag-water mixture in the slag flushing ditch (2) into the first sub-tank (31) or the second sub-tank (32). The intelligent slag grabbing crane (5) can perform slag grabbing operations on the first sub-tank (31) or the second sub-tank (32).
9. The system for steam recovery and descaling in blast furnace slag filter pool according to claim 1, characterized in that: The steam recovery and descaling system for the blast furnace slag filter pool also includes a liquid level monitoring device (34), a drainage device (7), a cooling tower (8) and a control system. The liquid level monitoring device (34) is located in the first sub-tank (31) and the second sub-tank (32). The liquid level monitoring device (34) can monitor the liquid level in the first sub-tank (31) and the second sub-tank (32) in real time. The filtered water in the first sub-tank (31) and the second sub-tank (32) is discharged from the drainage device (7). The drainage device (7) is connected to the cooling tower (8) through a drainage pipe. A water pump (71) is provided on the drainage pipe. The control system can control the operation of the steam recovery and descaling system for the blast furnace slag filter pool.
10. A method for operating the steam recovery and descaling system of the blast furnace slag filter pool according to claim 1, characterized in that: The working method of the system for steam recovery and descaling in the blast furnace slag filter tank comprises the following steps: Step 1: The control system of the steam recovery and desmoking system of the blast furnace slag filter pool issues an interlocking control command, the mobile steam collecting device (4) moves rightward to the second sub-pool (32), the mobile steam collecting device (4) closes the upper end of the second sub-pool (32), and the water slag flushing production operation starts. The slag-water mixture in the granulating tower (1) enters the second sub-pool (32) through the slag flushing ditch (2) and the slag-water conveying device (21) in turn, and the intelligent slag grabbing overhead crane (5) The slag particles in the first sub-tank (31) are grabbed and transported to the slag particle collection bucket (33); after the slag particles (9) dropped by the intelligent slag grabbing overhead crane (5) fall on any self-weight unloading type flap (432), the slag particles (9) can rotate the self-weight unloading type flap (432) by relying on their own gravity and impact force, and after the self-weight unloading type flap (432) rotates, the slag particles (9) on the self-weight unloading type flap (432) fall into the second sub-tank (32); Alternatively, after the slag particles (9) spilled by the intelligent slag grabbing crane (5) fall on any of the self-weight unloading flaps (432), the slag particles (9) move along the inclined direction of the left plate (437) or the right plate (438) and slide to the junction of two adjacent self-weight unloading flaps (432). The two adjacent self-weight unloading flaps (432) deflect and form a gap, so that the collected slag particles (9) fall into the second sub-pool (32); Step 2: The control system of the steam recovery and desmoking system of the blast furnace slag filter tank sends an interlocking control command, the mobile steam collecting device (4) moves to the left to the first sub-tank (31), the mobile steam collecting device (4) closes the upper end of the first sub-tank (31), and the water slag flushing production operation starts. The slag-water mixture in the granulating tower (1) enters the first sub-tank (31) through the slag flushing ditch (2) and the slag-water conveying device (21) in turn, and the intelligent slag grabbing crane (5) grabs the slag particles in the second sub-tank (32) and transports them to the slag particle collection bucket (33); Step 3: Repeat steps 1 and 2 above.