Steam recovery system of blast furnace water slag filter tank

Abstract

The utility model discloses a steam recovery system for a blast furnace water slag filter tank, belongs to the technical field of blast furnace water slag flushing, and aims to solve the problem that slag particles scattered by a grab bucket of a crown block for a long time easily crush a movable steam collection cover. The blast furnace water slag filter tank steam recovery system comprises a slag sluice (1), a filter tank body (3), a movable steam collecting device (4) and an intelligent slag grabbing crown block (5), the movable 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 cover areas (431), and each sealing cover area (431) comprises a plurality of self-weight discharging type turning plates (432). The slag particles fall on the self-weight discharging type turning plate, so that the self-weight discharging type turning plate can rotate and fall into the bottom filter tank, the situation that the movable steam collecting cover is easily crushed by accumulated slag can be avoided, the operation environment of a blast furnace water slag area is also improved, and equipment guarantee is provided for realizing green factories.

Description

Technical Field

[0001] The utility model relates to the technical field of blast furnace water slagging, in particular to a steam recovery system for a blast furnace water slag filtering tank. Background Technique

[0002] High-temperature liquid slag is the main by-product of blast furnace smelting, with extremely high value of solid waste resource recycling and economic benefits. At present, the mainstream slag treatment method in iron and steel enterprises is the water slagging process. High-speed water flow is used to break and quench the molten slag into a loose slag-water mixture (hereinafter referred to as water slag), which flows into the filtering tank through the slag flushing channel. The liquid water is filtered through the filter layer in the filtering tank, leaving solid and wet slag particles on the top of the filter material, and then the slag particles are grabbed by a bridge-type grab crane and transported out by a vehicle or a belt.

[0003] The liquid molten slag has a relatively high temperature (1350°C - 1500°C). During the water quenching granulation process of a large amount of molten slag, intense heat transfer continuously occurs, generating a large amount of steam. Especially in winter, the environmental temperature is low and the environmental temperature difference is large, resulting in more steam generation. To avoid the escape and direct emission of the generated steam, a steam collection device is provided on the top of the filtering tank. However, during the slag grabbing process, the slag particles in the grab bucket will spill, 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, as Figure 1 shown, the existing bottom filtering tank includes a first sub-tank 31 and a second sub-tank 32 arranged left and right. The bottom filtering tank further includes a mobile steam collection device 4, which can move left and right on the first sub-tank 31 and the second sub-tank 32. A slag particle collection hopper 33 is arranged outside the right side of the second sub-tank 32. During the process of the intelligent slag grabbing crane 5 grabbing the slag particles in the first sub-tank 31 and transporting them into the slag particle collection hopper 33, the slag particles in the intelligent slag grabbing crane 5 will spill onto the mobile steam collection device 4 on the second sub-tank 32. After long-term operation, the slag accumulation on the top of the mobile steam collection device 4 is relatively serious and is easily crushed. Content of the Utility Model

[0005] In order to solve the problem that the slag particles spilled by the overhead crane grab for a long time are easy to crush the mobile steam collection cover, the utility model provides a steam recovery system for a blast furnace water slag filtering tank. The steam recovery system of the filtering tank is provided with a self-weight unloading type flap. When the slag particles fall on the self-weight unloading type flap, the self-weight unloading type flap can rotate and fall into the bottom filtering tank, which can not only avoid the situation that the mobile steam collection cover is easily crushed by the accumulated slag, but also improve the working environment in the blast furnace water slag area, and provide equipment guarantee for realizing a green factory.

[0006] The technical solution adopted by the utility model to solve its technical problems is:

[0007] A steam recovery system for a blast furnace slag filtration pond, comprising a slag flushing channel, a filtration pond body, and a movable steam collection device. The filtration pond body includes a first sub-pond and a second sub-pond arranged left and right. The movable steam collection device includes a support frame, a top cover, and a driving mechanism. The top cover contains multiple cover areas, and each cover area contains multiple self-weight discharging flap plates. The self-weight discharging flap plates are connected to the support frame through rotating shafts, the rotating shafts are in a horizontal state, the self-weight discharging flap plates can rotate around the rotating shafts, and the driving mechanism can drive the movable steam collection device to move left and right on the first sub-pond and the second sub-pond.

[0008] The top cover contains multiple cover areas arranged in the front-back direction. The support frame contains a bottom frame, and the bottom frame contains cross beams and longitudinal beams. The cross beams extend in the left-right direction, the longitudinal beams extend in the front-back direction, two longitudinal beams are arranged at a left-right interval, multiple cross beams are located between the two longitudinal beams, and the multiple cross beams are arranged at intervals in the front-back direction. A cover installation area is formed between two adjacent cross beams.

[0009] Each cover area contains multiple self-weight discharging flap plates arranged in the left-right direction. The cover areas and the cover installation areas are in one-to-one correspondence. An installation cross bar is arranged above the cross beam, and the installation cross bar is arranged parallel to the cross beam up and down. The installation cross bar is connected and fixed to the cross beam through installation columns.

[0010] Multiple bearing seats are arranged on each installation cross bar, and the multiple bearing seats are arranged at intervals in the left-right direction. The rotating shaft extends in the front-back direction, and the end of the rotating shaft is connected to the bearing seat through a bearing.

[0011] The self-weight discharging flap plate has a pointed roof-shaped structure. The self-weight discharging flap plate contains a front side plate, a rear side plate, a left side plate, and a right side plate. The front side plate and the rear side plate are arranged at a front-back interval. The left side plate and the right side plate are located between the front side plate and the rear side plate, and the left side plate and the right side plate are connected to form an inverted V-shaped structure.

[0012] Both the front side plate and the rear side plate are triangular. The front side plate and the rear side plate are front-back symmetric and mirror images of each other. The front end of the left side plate and the front end of the right side plate are both connected to the upper side edge of the front side plate in a matching manner. The rear end of the left side plate and the rear end of the right side plate are both connected to the upper side edge of the rear side plate in a matching manner.

[0013] The left side plate and the right side plate are left-right symmetric and mirror images of each other, or the length of the left side plate is greater than the length of the right side plate in the left-right direction.

[0014] The self-weight discharging flap plate is connected and fixed to the rotating shaft. The opening of the self-weight discharging flap plate faces downward. A sealing strip is arranged at the lower end edge of the self-weight discharging flap plate. The sealing strips of two adjacent self-weight discharging flap plates on the left and right can rub against each other, and the sealing strip of one self-weight discharging flap plate can rub against the bottom frame.

[0015] The steam recovery system of the filtration tank further includes a slag water conveying device and an intelligent slag grabbing crane. The slag water conveying device can send the slag water mixture in the slag flushing ditch into the first sub-tank or the second sub-tank, and the intelligent slag grabbing crane can perform slag grabbing operations on the first sub-tank or the second sub-tank.

[0016] The steam recovery system of the filtration tank further includes a liquid level monitoring device, a drainage device and a control system. The liquid level monitoring device is located in the first sub-tank and the second sub-tank. The liquid level monitoring device can monitor the liquid level heights in the first sub-tank and the second sub-tank in real time. The filtered water in the first sub-tank and the second sub-tank is discharged from the drainage device, and the control system can control the operation of the steam recovery system of the blast furnace slag filtration tank.

[0017] The beneficial effect of the present utility model is that the steam recovery system of the blast furnace slag filtration tank is provided with a self-weight discharging type flap. The slag particles scattered by the overhead crane grab fall on the self-weight discharging type flap, which can cause the self-weight discharging type flap to rotate and fall into the bottom filtration tank, avoiding situations such as the steam collection device being easily crushed by accumulated slag and being easily damaged by the overhead crane grab. It has the advantages of more feasible solutions, more stable and reliable operation, and more convenient and rapid maintenance, improving the working environment in the blast furnace slag area and providing equipment guarantee for the realization of a green factory. Brief Description of the Drawings

[0018] The specification drawings forming a part of this application are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model.

[0019] Figure 1 is a top view schematic diagram of the steam recovery system of the filtration tank in the prior art.

[0020] Figure 2 is a front view schematic diagram of the steam recovery system of the filtration tank described in the present utility model.

[0021] Figure 3 is a left view schematic diagram of the steam recovery system of the filtration tank described in the present utility model.

[0022] Figure 4 is a top view schematic diagram of the steam recovery system of the filtration tank described in the present utility model.

[0023] Figure 5 is a top view schematic diagram of the mobile steam collection device.

[0024] Figure 6 is Figure 5 an enlarged schematic diagram of part A in

[0025] Figure 7 is a left view schematic diagram of the support frame.

[0026] Figure 8 It is a three-dimensional schematic diagram of the support frame.

[0027] Figure 9 It is a schematic diagram of a self-weight unloading flap.

[0028] Figure 10 It is a schematic diagram of the working status of the self-weight unloading flap.

[0029] Description of reference numerals:

[0030] 1. Slag flushing ditch; 2. Slag water conveying device; 3. Filter tank; 4. Mobile steam collection device; 5. Intelligent slag grabbing crane; 6. Liquid level monitoring device; 7. Drainage device; 8. Slag particles;

[0031] 31. First sub-tank; 32. Second sub-tank; 33. Slag particle collection bucket;

[0032] 41. Support frame; 42. Driving mechanism; 43. Top cover;

[0033] 411, bottom frame; 412, cross beam; 413, longitudinal beam; 414, enclosure installation area; 415, installation cross bar; 416, installation column; 417, bearing seat;

[0034] 431. Enclosure area; 432. Self-weight unloading flap; 433. Rotating shaft; 434. Bearing; 435. Front side plate; 436. Rear side plate; 437. Left side plate; 438. Right side plate. DETAILED DESCRIPTION

[0035] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0036] In order to facilitate understanding and description, the following description of the present invention adopts an absolute position relationship. Unless otherwise specified, the directional word "upper" means Figure 3 The directional word "下" indicates the upper direction. Figure 3 The downward direction in the word "left" indicates Figure 3 The left direction in the word "right" indicates Figure 3 The right direction in the word "front" means perpendicular to Figure 3 The paper surface and points to the inside of the paper surface. The directional word "后" means perpendicular to Figure 3 The paper surface and points to the direction outside the paper surface. The utility model adopts the observation perspective of the reader or user to describe, but the above-mentioned directional words cannot be understood or interpreted as limiting the protection scope of the utility model. Regarding the size and angle of the components, those skilled in the art can determine them specifically according to actual needs.

[0037] As Figures 2 to 6 shown, a steam recovery system for a blast furnace slag filtration tank according to an embodiment of the present utility model includes a slag flushing channel 1, a filtration tank body 3, and a mobile steam collection device 4. The filtration tank body 3 includes a first sub-tank 31 and a second sub-tank 32 arranged left and right. The mobile steam collection device 4 includes a support frame 41, a top cover 43, and a driving mechanism 42. The top cover 43 contains a plurality of cover areas 431, and each cover area 431 contains a plurality of self-weight discharging flaps 432. The self-weight discharging flaps 432 are connected to the support frame 41 through a rotating shaft 433. The rotating shaft 433 is in a horizontal state, and the self-weight discharging flaps 432 can rotate around the rotating shaft 433. The driving mechanism 42 can drive the mobile steam collection device 4 to move left and right on the first sub-tank 31 and the second sub-tank 32.

[0038] As Figures 4 to 10 shown, the filtration tank steam recovery system contains a plurality of self-weight discharging flaps 432. After the slag particles 8 fall on the self-weight discharging flaps 432, the slag particles 8 can cause the self-weight discharging flaps 432 to rotate, and the slag particles 8 can fall into the bottom filtration tank, which can not only avoid the situation that the blast furnace slag filtration tank steam recovery system is easily collapsed by accumulated slag, but also improve the working environment in the blast furnace slag area, providing equipment guarantee for realizing a green factory.

[0039] The support frame 41 can select a steel structure beam that meets the size according to the size of a single filtration tank body. The top cover 43 contains a plurality of cover areas 431 arranged in the front-back direction. The support frame 41 contains a bottom frame 411. The bottom frame 411 has a rectangular structure. The bottom frame 411 contains cross beams 412 and longitudinal beams 413. The cross beams 412 extend in the left-right direction, and the longitudinal beams 413 extend in the front-back direction. The two longitudinal beams 413 are arranged parallel and spaced left and right. A plurality of cross beams 412 are located between the two longitudinal beams 413. The plurality of cross beams 412 are arranged at intervals in the front-back direction. The left and right ends of the cross beams 412 are respectively connected and fixed to the two longitudinal beams 413. A cover installation area 414 is formed between two adjacent cross beams 412.

[0040] As Figures 4 to 8 shown, each cover area 431 contains a plurality of self-weight discharging flaps 432 arranged in the left-right direction. The cover areas 431 and the cover installation areas 414 are in one-to-one correspondence. For example, both the cover areas 431 and the cover installation areas 414 contain 7. An installation cross bar 415 is arranged above the cross beam 412. The installation cross bar 415 extends in the left-right direction. The installation cross bar 415 is arranged parallel to the cross beam 412 up and down. The installation cross bar 415 is connected and fixed to the cross beam 412 through installation columns 416. The plurality of installation columns 416 are arranged at intervals in the left-right direction.

[0041] A plurality of bearing seats 417 are provided on each mounting cross bar 415, and the plurality of bearing seats 417 are arranged at intervals in the left - right direction. Each enclosure area 431 contains a plurality of rotating shafts 433. Within each enclosure area 431, the gravity - discharge type flap 432 and the rotating shaft 433 are connected in one - to - one correspondence, and each gravity - discharge type flap 432 can be disassembled individually. The rotating shaft 433 extends in the front - rear direction, and the end of the rotating shaft 433 is connected to the bearing seat 417 through a bearing 434.

[0042] To ensure that the steam collection device can be used for a long time and maintain structural stability in a water slag environment, the gravity - discharge type flap 432 is preferably made of a material resistant to acid, alkali, and high temperature (such as 100 °C), such as fiberglass. As Figure 9 shown, the gravity - discharge type flap 432 is generally in the shape of a pointed roof structure (or arch - bridge shape). The gravity - discharge type flap 432 includes a front side plate 435, a rear side plate 436, a left side plate 437, and a right side plate 438. The front side plate 435 and the rear side plate 436 are arranged at intervals in the front - rear direction. The left side plate 437 and the right side plate 438 are located between the front side plate 435 and the rear side plate 436. The left side plate 437 and the right side plate 438 are connected to form an inverted V - shaped structure, and the included angle between the left side plate 437 and the right side plate 438 can be 110° - 160°.

[0043] Both the front side plate 435 and the rear side plate 436 are triangular. The front side plate 435 and the rear side plate 436 are symmetric in the front - rear direction and are 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 hermetically connected to the upper side edge of the front side plate 435 in a matching manner. The rear end of the left side plate 437 and the rear end of the right side plate 438 are hermetically connected to the upper side edge of the rear side plate 436 in a matching manner. The upper ends of the left side plate 437 and the right side plate 438 are hermetically connected in a matching manner.

[0044] The gravity - discharge type flap 432 is fixedly connected to the rotating shaft 433. The rotating shaft 433 passes through the front side plate 435 and the rear side plate 436 of the gravity - discharge type flap 432. The tip of the gravity - discharge type flap 432 faces upward, and the opening of the gravity - discharge type flap 432 faces downward. The left side plate 437 and the right side plate 438 can be symmetric in the left - right direction and be mirror images of each other. Or, in order to make it easier for the gravity - discharge type flap 432 to rotate after the slag particles 8 fall on it, the length of the left side plate 437 can be greater than the length of the right side plate 438 in the left - right direction.

[0045] In order to enable the blast furnace slag filtration tank steam recovery system to have good sealing performance, the lower ends of two adjacent self-weight discharging flap plates 432 match each other, and the lower end of the self-weight discharging flap plate 432 matches the cross beam 412 adjacent to it in the front and back. A sealing strip is provided at the lower end edge of the self-weight discharging flap plate 432. The sealing strips of two adjacent self-weight discharging flap plates 432 on the left and right can rub against each other, and the sealing strip of one self-weight discharging flap plate 432 can rub against the cross beam 412 of the adjacent bottom frame 411.

[0046] 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 not only ensure good sealing effect during the rotation of the self-weight discharging flap plate 432, but also avoid excessive frictional resistance caused by using a rubber sealing strip, which is not conducive to the self-weight discharging flap plate 432 not rotating flexibly due to insufficient gravity of the slag particles 8.

[0047] Four wheels and multiple layers of sealing components are connected below the support frame 41. 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 multiple layers of sealing components (also called a sealing curtain) are in a rectangular structure. The support frame 41 and the multiple layers of sealing components are connected in an up-and-down matching manner. The multiple layers of sealing components can ensure the sealed connection between the support frame 41 and the bottom filtration tank. Ensure that the steam collection device can also ensure the sealing effect and service life in the presence of movement errors.

[0048] The driving mechanism 42 can adopt an existing motor. The driving mechanism 42 can drive the wheels to rotate, and the driving mechanism 42 is connected and fixed to the support frame 41. To ensure the stability and smoothness during the translation of the equipment, the motors are preferably arranged on the opposite sides, and two motors are appropriate. The installation position is above the support frame 41 of the steam collection device 4. Rails are provided on the first sub-tank 31 and the second sub-tank 32. 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 moving 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, realizing the full closure of the filtration tank and the "zero emission" of steam.

[0049] As Figures 2 to 4 shown, the blast furnace slag filtration tank steam recovery system further includes a slag water conveying device 2, an intelligent slag grabbing crane 5, and a slag particle collecting hopper 33. The slag particle collecting hopper 33 is located directly to the right of the filtration tank body 3. The slag flushing ditch 1 is connected to the filtration tank body 3 through the slag water conveying device 2. The slag water conveying device 2 can send the slag water mixture in the slag flushing ditch 1 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. The slag particle collecting hopper 33 is located on the right side of the filtration tank body 3.

[0050] During the water slag flushing operation, the slag-water mixture flows along the slag flushing channel 1 and the slag-water conveying device 2 into the filtration tank body 3, and the separation of slag and water is completed within the filtration tank body 3. The inlet of the slag-water conveying device 2 is communicated with the outlet of the slag flushing channel 1, and the outlet of the slag-water conveying device 2 can be communicated with the first sub-tank 31 or the second sub-tank 32. Generally, to ensure the continuous production of the water slag flushing process, the filtration tank body 3 is composed of two or more adjacent filter tanks. When the slag-water capacity in a certain filter tank reaches the maximum capacity, the slag-water mixture can be led to the other filter tanks through the hydraulic control of the slag-water conveying device 2 to realize the switching function between adjacent filter tanks. The intelligent slag-grabbing overhead crane 5 is mainly used to transport the solid slag particles in the filtration tank body 3 into the collection hopper, and the subsequent resource treatment of the slag particles is realized by using a vehicle or a slag conveyor belt.

[0051] As Figures 2 to 4 shown, the blast furnace water slag filtration tank steam recovery system further includes a liquid level monitoring device 6, a drainage device 7 and a control system. The liquid level monitoring device 6 is located in the first sub-tank 31 and the second sub-tank 32. The liquid level monitoring device 6 can monitor the liquid level heights in the first sub-tank 31 and the second sub-tank 32 in real time. The drainage device 7 discharges the filtered water in the first sub-tank 31 and the second sub-tank 32, and the control system can control the operation of the blast furnace water slag filtration tank steam recovery system.

[0052] The drainage device 7 is placed at the bottom of the filtration tank body 3, and different particle size filtering media can be laid above the drainage device 7. Through physical filtration of the slag-water mixture, the slag particles are left on the surface of the filtering media, and the slag flushing water passes through the filtering media and is discharged along the drainage device 7 to realize the physical separation of solid slag particles and liquid water. The selection of the particle size of the filtering media is related to the size of the slag particles, and the principle to be followed is that the particle size of the topmost filtering media must be smaller than the diameter of the slag particles to ensure that the slag particles can be retained on the top of the filtering media.

[0053] The main media stored in the filtration tank body 3 are: the mixture of solid slag particles and liquid water (i.e., when the filtration operation has not started in the tank), and solid slag particles (i.e., when the liquid water in the tank has been filtered out). The water level height in the filtration tank body 3 is the key to ensuring that the high-temperature slag flushing water does not overflow and realizing safe slag flushing production. Because during the slag flushing operation, the mobile steam collection device 4 forms a closed space with the filtration tank body 3, it is necessary to set up a liquid level monitoring device 6 to observe the liquid level situation in real time.

[0054] The working process of the bottom filtration tank and the blast furnace water slag filtration tank steam recovery system is introduced below.

[0055] Step 1: When the blast furnace meets the tapping conditions, the blast furnace water granulation system issues an interlock control instruction to drive the driving mechanism 42 to work. The mobile steam collection device 4 moves rightward to the second sub-pool 32, and the mobile steam collection device 4 seals the upper end of the second sub-pool 32. Then the driving mechanism 42 stops working. After the mobile steam collection device 4 stops, a stop-in-place instruction is issued. At the same time, a staff member sends a control signal to the granulation control room to start the water granulation production operation, and the control system turns on the granulation signal. The granulation water electric valve and the valve of the granulation trench 1 are opened, and the outlet of the slag-water conveying device 2 rotates to connect the outlet of the slag-water conveying device 2 with the second sub-pool 32. The slag-water mixture enters the second sub-pool 32 through the granulation trench 1 and the slag-water conveying device 2 in sequence. After the granulation command for the second sub-pool 32 is issued, the first sub-pool 31 synchronously starts the slag-grabbing process, that is, the intelligent slag-grabbing crane 5 grabs the slag particles in the first sub-pool 31 and transports them into the slag particle collection hopper 33, and then uses the belt or vehicle area to realize the external transportation of slag particles. After the slag particles 8 scattered by the intelligent slag-grabbing crane 5 fall on any self-weight unloading flap 432, the slag particles 8 can rotate the self-weight unloading flap 432 by relying on their own gravity and impact force. After the self-weight unloading flap 432 rotates, the slag particles 8 on the self-weight unloading flap 432 can fall into the second sub-pool 32.

[0056] Alternatively, after the slag particles 8 scattered by the intelligent slag-grabbing crane 5 fall on any self-weight unloading flap 432, the slag particles 8 move along the inclined direction of the left side plate 437 or the right side plate 438 and slide to the junction of two adjacent self-weight unloading flaps 432. When the accumulated amount of the scattered slag particles 8 is large enough, a relatively large pressure will be generated, causing two adjacent self-weight unloading flaps 432 to deflect and form a gap, so that the accumulated slag particles 8 fall into the second sub-pool 32, realizing the automatic slag unloading function of the steam collection device and also 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 in pairs also provide a solid guarantee for the rapid maintenance of the steam collection device.

[0057] In addition, anti-collision steel columns can be added to avoid damage caused by the grab of the crane colliding with the steam collection device due to manual operation errors or automation failures of the slag-grabbing crane.

[0058] Step 2: When the blast furnace meets the tapping conditions, the blast furnace water granulation system issues an interlock control instruction, causing the driving mechanism 42 to operate. The movable steam collection device 4 moves leftward to the first sub-pool 31, and the movable steam collection device 4 seals the upper end of the first sub-pool 31. Then the driving mechanism 42 stops working. After the movable steam collection device 4 stops, a stop-in-place instruction is issued. Meanwhile, a staff member sends a control signal to the slag granulation control room to start the water granulation production operation, and the control system turns on the slag granulation signal. The slag granulation water electric valve and the slag granulation trench valve are opened, and the outlet of the slag water conveying device 2 rotates to connect the outlet of the slag water conveying device 2 with the first sub-pool 31. The slag water mixture sequentially enters the first sub-pool 31 through the slag granulation trench 1 and the slag water conveying device 2. After the slag granulation command for the first sub-pool 31 is issued, the second sub-pool 32 synchronously starts the slag-grabbing process, that is, the intelligent slag-grabbing overhead crane 5 grabs the slag particles in the second sub-pool 32 and transports them into the slag particle collection hopper 33, and then uses the belt or vehicle area to realize the external transportation of the slag particles.

[0059] Step 3: The above steps 1 and 2 can be sequentially repeated as needed to achieve continuous operation. Observing the water level height information in the first sub-pool 31 and the second sub-pool 32 is the key to switching the working filter tank and the systematic process control. To ensure that the water level height in the filter tank is lower than the filter tank wall during the water granulation process, scanning devices or imaging equipment can be added to the blast furnace slag filter steam recovery system, the first sub-pool 31, and the second sub-pool 32 to dynamically measure the water level height in the first sub-pool 31 and the second sub-pool 32 in real time during the slag granulation process.

[0060] As described above, the above are only specific embodiments of the present invention, and the scope of the implementation of the invention cannot be limited by them. Therefore, the replacement of equivalent components or the equivalent changes and modifications made according to the protection scope of the present invention should still fall within the scope covered by the present invention. In addition, the technical features in the present invention, between technical features, between technical features and technical solutions, and between technical solutions can be freely combined and used.

Claims

1. A blast furnace slag filter tank steam recovery system, characterized in that: The steam recovery system for a blast furnace slag filter pool comprises a slag flushing ditch (1), a filter pool body (3) and a mobile steam collecting device (4); the filter pool body (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 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); and 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 blast furnace slag filter tank steam recovery system 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 blast furnace slag filter tank steam recovery system 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 blast furnace slag filter tank steam recovery system 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 blast furnace slag filter tank steam recovery system 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 blast furnace slag filter tank steam recovery system 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 blast furnace slag filter tank steam recovery system according to claim 5, characterized in that: The left side plate (437) and the right side plate (438) are symmetrical and mirror images of each other, or the length of the left side plate (437) along the left-right direction is greater than the length of the right side plate (438).

8. The blast furnace slag filter tank steam recovery system 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).

9. The blast furnace slag filter tank steam recovery system according to claim 1, characterized in that: The blast furnace slag filter pool steam recovery system also includes a slag water conveying device (2) and an intelligent slag grabbing overhead crane (5), wherein the slag water conveying device (2) is capable of conveying the slag water mixture in the slag flushing ditch (1) into the first sub-pool (31) or the second sub-pool (32), and the intelligent slag grabbing overhead crane (5) is capable of performing slag grabbing operations on the first sub-pool (31) or the second sub-pool (32).

10. The blast furnace slag filter tank steam recovery system according to claim 1, characterized in that: The steam recovery system for the blast furnace slag filter pool also includes a liquid level monitoring device (6), a drainage device (7) and a control system. The liquid level monitoring device (6) is located in the first sub-tank (31) and the second sub-tank (32). The liquid level monitoring device (6) 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 control system can control the operation of the steam recovery system for the blast furnace slag filter pool.

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