Molten steel slag waste heat recovery device

Abstract

The invention discloses a molten steel slag waste heat recovery device, relates to the technical field of steel slag treatment, is particularly suitable for waste heat recovery treatment and coarse crushing treatment of molten steel slag, and comprises a recovery chamber, the recovery chamber is composed of a heat extraction housing, a housing wall frame and a heat exchange cooling bed, and a membrane wall heat exchanger is arranged in the heat extraction housing; the device is reasonable in design and simple in principle, the heat exchange mode of combining dividing wall type heat exchange and heat radiation heat exchange is adopted, waste heat recovery and coarse crushing of molten steel slag can be effectively and rapidly completed, no water resource is wasted in the whole process, dust is removed through a dry method, the energy consumption is low, and the production cost is low. Water treatment equipment such as a sedimentation water tank is not needed, energy consumption equipment is few, steel slag and equipment are not prone to adhering, equipment abrasion is small, waste heat recovery is carried out in a closed space, the high-temperature condition of a working area is obviously improved, long-term operation and overhaul of the equipment are more convenient, the equipment can be continuously laid and connected in parallel, the working efficiency is obviously improved, and the device is suitable for large-range popularization.

Description

Technical Field

[0001] The invention relates to the technical field of steel slag treatment, and in particular to a molten steel slag waste heat recovery device. Background Art

[0002] As we all know, steel slag is a variety of solid wastes produced during the steelmaking process, generally including converter slag, electric furnace slag and refined steel slag. The slag tapping temperature is often between 1200℃ and 1400℃, and its specific heat capacity is about 1.25. k J / (kg·℃). For example, if the waste heat of one ton of steel slag is reduced from 1400℃ to 400℃, 1.2×109J of heat can be obtained, which is a very high-quality waste heat resource.

[0003] At present, the traditional cooling processes for high-temperature molten steel slag are mainly hot stuffing, drum method, wind quenching, hot pouring, etc. The hot pouring method has been eliminated due to the serious environmental pollution. The remaining processes are to cool the steel slag by pumping water, ventilation, etc. These processes not only waste water resources, but also have problems such as high energy consumption and high pollution. Taking the hot stuffing method as an example, the high-temperature steel slag is poured into a slag pool or slag tank and cooled by pumping water. After the liquid water contacts the high-temperature steel slag, it quickly vaporizes and takes away the heat, thereby realizing the rapid cooling and solidification of the steel slag. However, in this process, a large amount of dust-containing water vapor will be generated, which not only wastes a lot of water resources, but also brings huge atmospheric pollutants. It is an unorganized emission behavior, and the waste heat resources contained in the high-temperature molten steel slag are completely wasted.

[0004] In view of this, the two-step process of roller crushing combined with hot stuffing gradually replaces the traditional process. The principle is to pour the high-temperature molten slag into the roller crushing bed, and then the material is continuously disturbed by the relative movement between the roller crushing roller and the crushing bed and the rotation of the crushing roller itself. In this process, water is pumped to achieve the initial cooling and granulation of the slag. This process can usually cool the high-temperature molten slag to 600-500℃, and then the high-temperature slag that has been initially cooled and granulated is discharged to the transfer slag tank and sent to the hot stuffing pool or hot stuffing tank in the second step, where water is pumped for cooling. Compared with the traditional process, the water consumption of this process is reduced. The roller crushing device is placed in a closed cover and a wet dust removal system is set up to ensure that the pollutants are discharged in compliance with the standards. The hot stuffing pool or hot stuffing tank is then equipped with a sealed cover to collect the steam generated by water pumping and hot stuffing for waste heat recovery. However, there is still the problem that the heat of the high-temperature section of the slag cannot be recovered, and there are still problems such as large equipment, high operating costs, high energy consumption, and waste of water resources. Summary of the invention

[0005] In view of the problems disclosed in the background technology, the present invention provides a molten steel slag waste heat recovery device.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A molten steel slag waste heat recovery device comprises a recovery chamber, wherein the recovery chamber is composed of a heat extraction cover shell at the top, a shell wall frame in the middle and a heat exchange cooling bed at the bottom, forming a closed heat exchange space;

[0008] Among them, the heat extraction cover shell closes the top of the shell wall frame and can be opened and closed. A membrane wall heat exchanger is arranged inside it. The membrane wall heat exchanger is suspended above the shell wall frame. The heat exchange cooling bed is composed of a plurality of heat exchange bed plates, which close the bottom of the shell wall frame and can be opened and closed. A heat exchange coil is wound inside the heat exchange bed plate. Slag extrusion heads are symmetrically arranged in the shell wall frame. The slag extrusion heads are relatively close or far away to perform an extrusion movement.

[0009] The above-mentioned molten steel slag waste heat recovery device is characterized in that a plurality of guide heat exchange tubes consistent with the movement direction of the slag extrusion head are arranged at the lower end of the heat extraction cover shell, the lower end surface of the guide heat exchange tube is matched and close to the upper end surface of the heat exchange cooling bed, and the lower end surface of the slag extrusion head is provided with a guide groove matched with the cross-section of the guide heat exchange tube.

[0010] The above-mentioned molten steel slag waste heat recovery device is characterized in that the upper end surface of the heat exchange bed plate is in a serrated groove shape to increase the surface area of ​​its upper end surface, the serrated groove structures on adjacent heat exchange bed plates are continuous and smoothly transitioned to each other, and the lower end of the slag extrusion head is also serrated and matches the serrated groove structure on the upper end surface of the heat exchange bed plate.

[0011] The above-mentioned molten steel slag waste heat recovery device is characterized in that tracks are arranged on both sides of the recovery chamber, and a gantry across the recovery chamber is arranged through the tracks, and a rotatable and dumpable slag bag is arranged on the gantry.

[0012] The above-mentioned molten steel slag waste heat recovery device is characterized in that the heat extraction shell is equipped with an opening and closing mechanism to control the opening and closing of the heat extraction shell. The opening and closing mechanism includes a column, a cantilever and a cantilever driver. The column is fixedly arranged on one side of the recovery chamber, and the cantilever driver is installed on the column. The cantilever is hingedly connected to the top of the column, one end of the cantilever is hingedly connected to the top of the heat extraction shell, and the other end is hingedly connected to the driving end of the cantilever driver. The cantilever driver controls the rotation of the cantilever, thereby controlling the opening and closing of the heat extraction shell.

[0013] The above-mentioned molten steel slag waste heat recovery device is characterized in that the inlet end and the return end of the membrane wall heat exchanger are led out from the cantilever and the column through pipelines and rotary joints, and interact with the heat-using equipment and / or the heat storage equipment.

[0014] The above-mentioned molten steel slag waste heat recovery device is characterized in that the heat extraction shell is composed of two symmetrical and oppositely opened heat extraction shell units, and a membrane wall heat exchanger is arranged in each heat extraction shell unit, one side of which is hingedly connected to the upper end surface of the shell wall frame, and the heat extraction shell unit is controlled to open and close by a heat extraction shell driver, and the heat extraction shell driver is installed at the hinge position of the heat extraction shell unit and the shell wall frame.

[0015] The above-mentioned molten steel slag waste heat recovery device is characterized in that the inlet end and the return end of the membrane wall heat exchanger are led out from the side of the recovery chamber through pipelines and rotary joints, pass through the underground track and gantry, and then interact with the heat-using equipment and / or heat storage equipment.

[0016] The above-mentioned molten steel slag waste heat recovery device is characterized in that the slag extrusion head is controlled to move by a slag extrusion driver, the slag extrusion driver is installed on the shell wall frame, the driving end of the slag extrusion driver extends into the shell wall frame and is connected to the slag extrusion head, and the slag extrusion head is controlled to move linearly under the guidance of the guide heat exchange tube;

[0017] A support column is provided at the bottom of the recovery chamber, and its horizontal height is raised by the support column to leave unloading space below the recovery chamber. A cooling bed driver is provided on the support column. One side of the heat exchange bed plate is hingedly connected to the lower end of the shell wall frame. One end of the cooling bed driver is hingedly connected to the support column, and the other end is hingedly connected to the heat exchange bed plate to control the opening and closing of the heat exchange cooling bed.

[0018] The above-mentioned molten steel slag waste heat recovery device is characterized in that the inlet end and the return end of the heat exchange coil and the guide heat exchange tube are led out from the side of the recovery chamber through pipelines and rotary joints, pass through the underground track and gantry, and then interact with the heat-using equipment and / or heat storage equipment.

[0019] Technical effects and advantages of the present invention:

[0020] The invention discloses a molten steel slag waste heat recovery device, relates to the technical field of steel slag treatment, and is particularly suitable for waste heat recovery treatment and coarse crushing treatment of molten steel slag, comprising a recovery chamber, the recovery chamber is composed of a heat extraction hood, a shell wall frame and a heat exchange cooling bed, a membrane wall heat exchanger is arranged in the heat extraction hood, the heat exchange cooling bed is composed of a plurality of heat exchange bed plates, and a slag extrusion head is arranged in the shell wall frame. The invention has reasonable design and simple principle, adopts a heat exchange mode combining inter-wall heat exchange and thermal radiation heat exchange, can effectively and quickly complete the waste heat recovery and coarse crushing of molten steel slag, no water resource is wasted in the whole process, dry dust removal can be adopted, no water treatment equipment such as sedimentation tank is required, less energy-consuming equipment is required, steel slag is not easy to stick to equipment, equipment wear is small, waste heat recovery is carried out in a closed space, high temperature situation in the working area is significantly improved, and long-term operation and maintenance of equipment are more convenient, and at the same time, equipment can be continuously laid in parallel, work efficiency is significantly improved, and it is suitable for large-scale promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a front cross-sectional view of the present invention (unloading state).

[0022] Figure 2 It is a front cross-sectional view of the present invention (feeding state).

[0023] Figure 3 This is a top view of the cross section of the heat exchange cooling bed.

[0024] Figure 4 This is a front cross-sectional view of the present invention (Example 6).

[0025] Figure 5 It is a simplified side cross-sectional view of the present invention.

[0026] Figure 6 : is a cross-sectional view of a heat exchange bed plate (Example 3).

[0027] Figure 7 It is a front cross-sectional view of the present invention (Examples 10 and 11).

[0028] Among them, the figure numbers are as follows: 1. recovery chamber; 2. heat extraction shell; 3. shell wall frame; 4. heat exchange cooling bed; 5. membrane wall heat exchanger; 6. heat exchange bed plate; 7. heat exchange coil; 8. slag extrusion head; 9. guide heat exchange tube; 10. guide groove; 11. track; 12. gantry; 13. slag bag; 14. opening and closing mechanism; 15. column; 16. cantilever; 17. cantilever drive; 18. heat extraction shell unit; 19. heat extraction shell drive; 20. slag extrusion drive; 21. support column; 22. cooling bed drive; 23. rotary joint; 24. slag stopper; 25. air inlet; 26. circulating fan. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] Example 1

[0031] As shown in the figure, this embodiment discloses a molten steel slag waste heat recovery device, which is used for waste heat recovery and preliminary granulation treatment of steel slag, and is particularly suitable for molten steel slag. Specifically, the waste heat recovery device includes a recovery chamber 1, wherein the recovery chamber 1 is composed of a heat extraction cover shell 2 at the top, a shell wall frame 3 in the middle, and a heat exchange cooling bed 4 at the bottom, forming a closed heat exchange space, which is also used as a granulation treatment space;

[0032] In this embodiment, the heat extraction cover 2 closes the top of the shell wall frame 3 and can be opened and closed to facilitate the feeding of molten steel slag. In order to achieve the waste heat recovery effect, a membrane wall heat exchanger 5 is arranged in the heat extraction cover 2, and the membrane wall heat exchanger 5 is suspended above the shell wall frame 3 to achieve the radiation heat exchange effect. In addition, the heat exchange cooling bed 4 of this embodiment is composed of a plurality of heat exchange bed plates 6, which close the bottom of the shell wall frame 3 and can be opened and closed to carry materials and discharge materials. A heat exchange coil 7 is wound inside the heat exchange bed plate 6 to achieve a partition wall heat exchange effect. At the same time, a slag extrusion head 8 is symmetrically arranged in the shell wall frame 3 of this embodiment, and the slag extrusion head 8 is relatively close or far away to perform an extrusion movement;

[0033] When the molten slag enters the recovery chamber 1 (at this time the heat exchange cooling bed 4 is closed and the slag extrusion head 8 is in a relatively distant state), the heat extraction cover 2 is closed, and the heat exchange coil 7 and the heat extraction cover 2 start to work to perform inter-wall heat exchange and radiation heat exchange. The molten slag then begins to cool and gradually solidify, and its outer layer forms a cooling shell, especially its bottom and top. The bottom of the molten slag shrinks due to cooling and solidification, and then separates from the upper end surface of the heat exchange bed plate 6 (to prevent adhesion), but also reduces the inter-wall heat exchange effect of the heat exchange bed plate 6. The cooling shell on the top of the molten slag will affect the radiation heat exchange effect of the membrane wall heat exchanger 5. Based on this, the slag extrusion head 8 starts to work and performs an extrusion movement. During this process, the molten slag The outer cooling shell is then broken, and the inter-wall heat exchange effect of the heat exchange bed plate 6 and the radiation heat exchange effect of the membrane wall heat exchanger 5 are stably and continuously carried out. As the extrusion movement of the slag extrusion head 8 is repeated many times, the molten steel slag is quickly cooled and solidified, and is squeezed and roughly crushed at the same time; and with the completion of the rough crushing (preliminary granulation treatment), the residual heat inside the steel slag gradually loses its recovery value. At this time, the slag extrusion head 8 is reset (restored to a relatively distant state), the heat exchange cooling bed 4 is opened, and the roughly crushed steel slag falls due to gravity, completing the unloading. After the unloading is completed, the heat exchange cooling bed 4 is reset and closed, and the heat removal cover shell 2 is opened, waiting for the next molten steel slag to be fed, and the waste heat recovery and preliminary granulation treatment of the steel slag are repeated.

[0034] Example 2

[0035] Based on the technical solution disclosed in Example 1, a molten steel slag waste heat recovery device in this embodiment is provided with a plurality of guide heat exchange tubes 9 in the same direction as the movement direction of the slag extrusion head 8 at the lower end of the heat extraction cover shell 2. The guide heat exchange tubes 9 have a partition wall heat exchange effect, and their upper surfaces can be designed to be arc-shaped to increase the heat exchange area and enhance the partition wall heat exchange effect. At the same time, the lower end surface of the guide heat exchange tubes 9 is in conformity with and close to the upper end surface of the heat exchange cooling bed 4 in the closed state, and the lower end surface of the slag extrusion head 8 is provided with a guide groove 10 that is in conformity with the cross-section of the guide heat exchange tubes 9, which provides a guiding function for the movement of the slag extrusion head 8 and ensures the stable operation of the extrusion movement of the slag extrusion head 8.

[0036] Example 3

[0037] In order to enhance the inter-wall heat exchange effect of the heat exchange cooling bed 4, a molten steel slag waste heat recovery device of this embodiment designs the upper end surface of the heat exchange bed plate 6 into a toothed groove structure to increase the surface area of ​​its upper end surface. The toothed groove structures on adjacent heat exchange bed plates 6 are continuous and smoothly transitioned to each other. Correspondingly, the lower end of the slag extrusion head 8 is also designed to be toothed and fits with the toothed groove structure on the upper end surface of the heat exchange bed plate 6. While enhancing the inter-wall heat exchange effect, it also has a better guiding effect of the slag extrusion head 8. At this time, it is also more conducive to conducting the accumulated heat on the slag extrusion head 8 toward the heat exchange bed plate 6, providing a guarantee for the long-term and stable operation of the molten steel slag waste heat recovery device.

[0038] In addition, to ensure the extrusion and crushing effects, in the present embodiment, the extrusion surface of the slag extrusion head 8 is provided with extrusion teeth distributed up and down in a stepped manner. Due to the extrusion crushing method, the equipment wear is greatly reduced compared to the existing crushing roller crushing method; at the same time, to prevent the slag from falling on the upper end surface of the slag extrusion head 8, in the present embodiment, a corresponding slag stopper 24 is fixedly provided in the shell wall frame 3 and above the slag extrusion head 8. The front edge of the slag stopper 24 is close to the upper end surface of the slag extrusion head 8. With the reciprocating motion of the slag extrusion head 8, the slag stopper 24 can effectively push the slag falling on the slag extrusion head 8 away from the upper end surface of the slag extrusion head 8.

[0039] Example 4

[0040] In order to achieve more convenient loading and feeding, a molten steel slag waste heat recovery device in this embodiment is provided with tracks 11 on both sides of the recovery chamber 1, and a gantry 12 spanning the recovery chamber 1 is provided through the track 11. The gantry 12 can move through the track 11, and a rotatable dumping slag bag 13 is provided thereon, which can effectively control the dumping angle (dumping amount) and dumping position of the molten steel slag, which helps to ensure equal quality slag dumping, and helps the dumped molten steel slag to form a thin and uniform material layer at the bottom of the recovery chamber 1, which helps to enhance the heat exchange and cooling effect of the molten steel slag waste heat recovery device.

[0041] Example 5

[0042] In order to facilitate the inflow and reflux of the membrane wall heat exchanger 5 and avoid interference with the gantry 12, a molten steel slag waste heat recovery device of this embodiment is provided, wherein the heat extraction cover shell 2 is provided with an opening and closing mechanism 14 to control the opening and closing of the heat extraction cover shell 2. The opening and closing mechanism 14 comprises a column 15, a cantilever 16 and a cantilever driver 17. The column 15 is fixedly arranged on one side of the recovery chamber 1 to avoid the track 11 on one side. The cantilever driver 17 is installed on the column 15. The cantilever 16 is hingedly connected to the top of the column 15. One end of the cantilever 16 is hingedly connected to the top of the heat extraction cover shell 2, and the other end is hingedly connected to the driving end of the cantilever driver 17. When the cantilever driver 17 is running, the lever principle is used to control the rotation of the cantilever 16, thereby controlling the movement of the heat extraction cover shell 2 to perform an opening and closing action. After the cantilever 16 rotates to a certain angle, it will not affect the movement of the gantry 12 on the track 11, thereby avoiding the influence on the feeding of the molten steel slag.

[0043] In addition, in order to avoid interference with the gantry 12, the inlet and return ends of the membrane wall heat exchanger 5 are led out from the cantilever 16 and the column 15 through pipelines and rotary joints 23, and then interact with the heat-using equipment and / or heat storage equipment to achieve the utilization and / or storage of waste heat.

[0044] Example 6

[0045] In order to more conveniently realize the opening and closing of the heat extraction shell 2 and the pipeline design of the membrane wall heat exchanger 5, a molten steel slag waste heat recovery device in this embodiment discloses the following technical scheme. Specifically, the heat extraction shell 2 in this embodiment is composed of two symmetrical and oppositely opened heat extraction shell units 18, one side of which is hingedly connected to the upper end surface of the shell wall frame 3, and is provided with a heat extraction shell driver 19, which is controlled to open and close by the heat extraction shell driver 19. The heat extraction shell driver 19 is installed at the hinge position of the heat extraction shell unit 18 and the shell wall frame 3. At the same time, in order to realize the heat exchange function, an independent membrane wall heat exchanger 5 is arranged in the heat extraction shell unit 18. When the heat extraction shell 2 is opened and closed, the membrane wall heat exchanger 5 moves along with it, and the inlet end and the return end of the membrane wall heat exchanger 5 are led out from the side of the recovery chamber 1 through the pipeline and the rotary joint 23, pass through the track 11 and the gantry 12 underground, and then interact with the heat-using equipment and / or the heat storage equipment.

[0046] Example 7

[0047] Based on the technical solutions of the above embodiments, a molten steel slag waste heat recovery device of this embodiment, wherein the slag extrusion head 8 is controlled to move by a slag extrusion driver 20, the slag extrusion driver 20 is installed on the shell wall frame 3, and its driving end extends into the shell wall frame 3 and is connected to the slag extrusion head 8, and the slag extrusion head 8 is controlled to move linearly under the guidance of the guide heat exchange tube 9, and with the technical solution disclosed in Example 3, it will have a better guiding effect;

[0048] In addition, a support column 21 is provided at the bottom of the recovery chamber 1, and its horizontal height is raised by the support column 21, so that unloading space is left under the recovery chamber 1. Of course, it can also be achieved by digging the foundation. During unloading, a dust suction device is correspondingly arranged around the bottom of the recovery chamber 1 for dry dust removal. In this embodiment, a cooling bed driver 22 is provided on the support column 21, and one side of the heat exchange bed plate 6 is hingedly connected to the lower end of the shell wall frame 3. One end of the cooling bed driver 22 is hingedly connected to the support column 21, and the other end is hingedly connected to the heat exchange bed plate 6 to control the opening and closing of the heat exchange cooling bed 4.

[0049] Example 8

[0050] Based on the technical solutions of the above embodiments, a molten steel slag waste heat recovery device of this embodiment, wherein the inlet and return ends of the heat exchange coil 7 and the guide heat exchange tube 9 are led out from the side of the recovery chamber 1 through the pipeline and the rotary joint 23, pass through the track 11 and the gantry 12 underground, and then interact with the heat-using equipment and / or heat storage equipment. In combination with the technical solutions disclosed in Example 6, the inlet and return ends of the heat exchange coil 7 and the guide heat exchange tube 9 can be led out together with the inlet and return ends of the membrane wall heat exchanger 5 after reflux, of course, the premise is that the refrigerant medium used therein is the same;

[0051] At the same time, a pump is provided on the pipeline connected to the relevant inlet end and return end to promote the flow of the refrigerant medium in the pipe, force the flow, and improve the heat exchange efficiency.

[0052] Example 9

[0053] The heat extraction housing driver 19, the slag extrusion driver 20 and the cooling bed driver 22 mentioned in the above embodiments may be one or more of pneumatic, hydraulic and electric drive devices, such as a gas cylinder, an oil cylinder and the like.

[0054] Example 10

[0055] Based on the molten steel slag waste heat recovery device disclosed in the above embodiment, it is not difficult to find that when the recovery chamber 1 is in a closed state, the air in the recovery chamber 1 is disturbed by natural convection. In order to further improve the heat exchange rate and effect, this embodiment sets an air inlet 25 and an air outlet on the front and rear sides of the shell wall frame 3, and communicates through an external air duct. The air duct is fixed on the outer wall of the shell wall frame 3, and a circulating fan 26 is arranged thereon. When the circulating fan 26 is started, it can effectively drive the gas flow in the recovery chamber 1, thereby accelerating the relative movement of the hot air in the recovery chamber 1 and the heating surface of the membrane wall heat exchanger 5 and the upper surface of the steel slag, realizing forced convection heat exchange with air as the medium and the membrane wall heat exchanger 5 as the heating party, enhancing the heat exchange effect and utilization effect of the membrane wall heat exchanger 5, and indirectly improving the overall heat exchange effect of the waste heat recovery device;

[0056] In addition, a heat-resistant dust collector (such as a cyclone dust collector) should be installed at one end of the air duct near the air outlet to filter dust, prevent dust pollution from affecting the normal operation of the equipment and increase its service life. The dust collector is detachable for regular cleaning and maintenance.

[0057] Embodiment 11

[0058] Based on the above-mentioned embodiment scheme, a molten steel slag waste heat recovery device of this embodiment, wherein the heat storage device can be a heat accumulator or a molten salt heat storage device, which can effectively balance the problem of uneven waste heat recovery and achieve the effect of continuous and stable heating. At the same time, it can achieve the technical effect of waste heat power generation by interacting with the generator set, can quickly respond to load changes, assist the generator set to smoothly adjust the output, and reduce the frequent start and stop of the generator set. In addition, there is also heat exchange between the heat storage device and the generator set, which can recover the heat generated by the generator set during operation, thereby improving the thermal energy utilization efficiency.

[0059] Example 12

[0060] Based on the contents of the above embodiments, in this embodiment, the recovery chambers 1 of the molten steel slag waste heat recovery device can be continuously distributed along the track 11, and the slag bags 13 are moved through the gantry 12 and the track 11, and are successively fed to the continuous recovery chambers 1 to achieve the purpose of continuous treatment of the molten steel slag. In addition, a conveying device can be arranged under the recovery chamber 1 which is lifted to a height by the support column 21 to collect the solidified steel slag that has completed waste heat recovery and coarse crushing, and send it to the rear end for more refined granulation treatment or other treatments.

[0061] In the description of the present invention, unless otherwise clearly specified and limited, the terms "set", "install", "connect", "connect", and "fix" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0062] The standard parts used in the present invention can all be purchased from the market, and the special-shaped parts can all be customized according to the description and the drawings.

[0063] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A molten steel slag waste heat recovery device, comprising a recovery chamber (1), characterized in that: The recovery chamber (1) is composed of a heat extraction cover shell (2) at the top, a shell wall frame (3) in the middle, and a heat exchange cooling bed (4) at the bottom, forming a closed heat exchange space; The heat extraction cover (2) seals the top of the shell wall frame (3) and can be opened and closed, and a membrane wall heat exchanger (5) is arranged therein. The membrane wall heat exchanger (5) is suspended above the shell wall frame (3). The heat exchange cooling bed (4) is composed of a plurality of heat exchange bed plates (6) and seals the bottom of the shell wall frame (3) and can be opened and closed. A heat exchange coil (7) is wound inside the heat exchange bed plate (6).

2. A molten steel slag waste heat recovery device according to claim 1, characterized in that: Slag extrusion heads (8) are symmetrically arranged in the shell wall frame (3), and the slag extrusion heads (8) are relatively close to or far away from each other to perform extrusion movement.

3. A molten steel slag waste heat recovery device according to claim 2, characterized in that: The lower end of the heat extraction housing (2) is provided with a plurality of guide heat exchange tubes (9) which are consistent with the movement direction of the slag extrusion head (8); the lower end surface of the guide heat exchange tube (9) is matched with and close to the upper end surface of the heat exchange cooling bed (4); and the lower end surface of the slag extrusion head (8) is provided with a guide groove (10) which is matched with the cross section of the guide heat exchange tube (9).

4. A molten steel slag waste heat recovery device according to claim 3, characterized in that: The upper end surface of the heat exchange bed plate (6) is in the shape of a toothed groove to increase the surface area of ​​the upper end surface. The toothed groove structures on adjacent heat exchange bed plates (6) are continuous and smoothly transitioned to each other. The lower end of the slag extrusion head (8) is also toothed and matches the toothed groove structure on the upper end surface of the heat exchange bed plate (6).

5. The molten steel slag waste heat recovery device according to claim 4, characterized in that: Tracks (11) are arranged on both sides of the recovery chamber (1), and a gantry (12) spanning the recovery chamber (1) is arranged via the tracks (11), and a slag bag (13) that can be rotatably dumped is arranged on the gantry (12).

6. The molten steel slag waste heat recovery device according to claim 5, characterized in that: The heat extraction cover (2) is provided with an opening and closing mechanism (14) for controlling the opening and closing of the heat extraction cover (2); the opening and closing mechanism (14) comprises a column (15), a cantilever (16) and a cantilever driver (17); the column (15) is fixedly arranged on one side of the recovery chamber (1); the cantilever driver (17) is installed on the column (15); the cantilever (16) is hingedly connected to the top of the column (15); one end of the cantilever (16) is hingedly connected to the top of the heat extraction cover (2); and the other end is hingedly connected to the driving end of the cantilever driver (17); the cantilever driver (17) controls the rotation of the cantilever (16) to thereby control the opening and closing of the heat extraction cover (2).

7. A molten steel slag waste heat recovery device according to claim 6, characterized in that: The inlet and return ends of the membrane wall heat exchanger (5) are led out from the cantilever (16) and the column (15) through pipelines and rotary joints, and interact with heat-using equipment and / or heat storage equipment.

8. The molten steel slag waste heat recovery device according to claim 5, characterized in that: The heat extraction casing (2) is composed of two symmetrical and split heat extraction casing units (18), each of which is provided with a membrane wall heat exchanger (5), one side of which is hingedly connected to the upper end surface of the shell wall frame (3), and the opening and closing of the heat extraction casing unit (18) is controlled by a heat extraction casing driver (19), and the heat extraction casing driver (19) is installed at a hinged position between the heat extraction casing unit (18) and the shell wall frame (3).

9. A molten steel slag waste heat recovery device according to any one of claims 4, 5, 6, 7 and 8, characterized in that: The slag extrusion head (8) is controlled to move by a slag extrusion driver (20). The slag extrusion driver (20) is installed on the shell wall frame (3). Its driving end extends into the shell wall frame (3) and is connected to the slag extrusion head (8). The slag extrusion head (8) is controlled to move linearly under the guidance of the guide heat exchange tube (9). A support column (21) is provided at the bottom of the recovery chamber (1), and its horizontal height is raised by the support column (21) so that a discharge space is left below the recovery chamber (1). A cooling bed driver (22) is provided on the support column (21). One side of the heat exchange bed plate (6) is hingedly connected to the lower end of the shell wall frame (3). One end of the cooling bed driver (22) is hingedly connected to the support column (21), and the other end is hingedly connected to the heat exchange bed plate (6) to control the opening and closing of the heat exchange cooling bed (4).

Images