Ultrahigh-temperature metallurgical slag molten salt heat exchanger

Abstract

The invention belongs to the technical field of ultra-high temperature metallurgical slag waste heat recovery, and particularly relates to an ultra-high temperature metallurgical slag molten salt heat exchanger. The ultra-high-temperature metallurgical slag molten salt heat exchanger comprises a box body, a heat exchanger and a molten salt heat exchanger, wherein a metallurgical slag inlet is formed in the top of the box body, and a metallurgical slag outlet is formed in the bottom; the internal heat exchange assembly is arranged in the box body; the side wall heat exchange assemblies are installed on the inner walls of the box body correspondingly. Wherein a supporting plate is arranged on the lower portion of the inner wall of the box body, a hanging plate used for being placed on the supporting plate is arranged on the outer wall of a backpack of the side wall heat exchange assembly, then the backpack is movably connected to the inner wall of the box body through a pull rod assembly, and the portion between the lower end of the backpack and the inner wall of the box body is sealed through an elastic piece. In other words, the pull rod assembly of the side wall heat exchange assembly is detachable, the hanging plate is placed on the supporting plate, and the elastic piece design is adopted for sealing, so that when the side wall heat exchange assembly breaks down, the heat exchanger does not need to be overall detached, and the broken-down side wall heat exchange assembly can be maintained and replaced online.

Description

Technical Field

[0001] The invention belongs to the technical field of waste heat recovery of ultra-high temperature metallurgical slag, and in particular relates to an ultra-high temperature metallurgical slag molten salt heat exchanger. Background Art

[0002] In the metallurgical industry, metallurgical slag produced during metallurgy is often processed. In order to improve the utilization of metallurgical slag, the waste heat of metallurgical slag is often recycled. The ultra-high temperature metallurgical slag molten salt heat exchanger can directly recycle the waste heat of ultra-high temperature liquid metallurgical slag, solving the problem that ultra-high temperature liquid metallurgical slag cannot be directly used for heat exchange.

[0003] Patent CN110186019A discloses a waste heat recovery device and a waste heat recovery system for ultra-high temperature liquid metallurgical slag, which can directly recover the waste heat of ultra-high temperature liquid metallurgical slag through molten salt by arranging heat exchange components inside and on the surrounding side walls of the heat exchange box 1.

[0004] However, in the prior art, the side wall heat exchange assembly of the heat exchange box is welded to the box, which results in that when the side wall heat exchange assembly fails, the production can only be stopped and the waste heat recovery device can be disassembled and repaired as a whole, but online rapid inspection and maintenance are impossible. Summary of the invention

[0005] The purpose of the present invention is to provide an ultra-high temperature metallurgical slag molten salt heat exchanger to solve the technical problem in the prior art that when a side wall heat exchange component of the heat exchange device fails, the production can only be stopped and the waste heat recovery device can only be disassembled and repaired as a whole.

[0006] In order to solve the above technical problems, the present invention provides an ultra-high temperature metallurgical slag molten salt heat exchanger, comprising:

[0007] The box body has a metallurgical slag inlet at the top and a metallurgical slag outlet at the bottom;

[0008] An internal heat exchange component is arranged inside the box;

[0009] Multiple side wall heat exchange components are installed on the inner walls of the box respectively;

[0010] A support plate is provided at the lower part of the inner wall of the box body;

[0011] The side wall heat exchange assembly comprises:

[0012] The backpack has a hanging plate for placing on the support plate on its outer wall, and a molten salt heat exchange tube assembly is embedded on its inner wall;

[0013] An elastic member, used for sealing between the lower end of the backpack and the inner wall of the box body; and

[0014] The pull rod assembly is used to movably connect the backpack to the inner wall of the box body.

[0015] In one embodiment of the present application, the elastic member comprises an arc-shaped member, one end of which is fixed to the outer side wall of the lower end of the backpack, and the other end is used to press against the side wall of the box body.

[0016] In one embodiment of the present application, the width of the hanging plate and the width of the supporting plate are both smaller than the width of the elastic member.

[0017] In one embodiment of the present application, the pull rod assembly includes:

[0018] A connecting rod, the inner end of which is fixedly connected to the outer wall of the backpack, and the outer end of which extends out of the box body through a mounting hole on the side wall of the box body;

[0019] A limit nut is arranged on the outer end of the connecting rod; wherein

[0020] When the backpack is deformed by heat, the connecting rod moves outward in the mounting hole.

[0021] In one embodiment of the present application, the backpack includes an outer wall panel, a side panel, a bottom panel and an inner wall panel that are enclosed;

[0022] A heat-conducting material is arranged in the backpack;

[0023] The molten salt heat exchange tube assembly is partially exposed on the inner wall plate.

[0024] In one embodiment of the present application, a positioning angle plate is provided at the inner corner between the inner walls of the box;

[0025] The side edges of the inner wall plates of the backpack are embedded in the positioning angle plates.

[0026] In one embodiment of the present application, the positioning angle plate includes two intersecting positioning plates, and a groove facing the inner corner of the box body is provided at the intersection of the two positioning plates;

[0027] The side edge of the inner wall plate is provided with a flange portion that exceeds the side wall of the backpack, and the flange portion is accommodated in the groove.

[0028] In one embodiment of the present application, the flange portion is bent toward the outer wall plate of the backpack and is pressed against the inner wall of the groove.

[0029] In one embodiment of the present application, the ultra-high temperature metallurgical slag molten salt heat exchanger further includes:

[0030] A sealing door, one end of which is hinged on one side of the box body;

[0031] A door opening actuator, one end of which is mounted on the box body and the other end is connected to the sealed door;

[0032] A plurality of locking devices are used to lock the sealing door when the sealing door is blocked on the metallurgical slag outlet.

[0033] In one embodiment of the present application, the ultra-high temperature metallurgical slag molten salt heat exchanger further includes:

[0034] A push plate is arranged in the box body; and a push cylinder is used to drive the push plate to push the metallurgical slag in the box body out of the metallurgical slag outlet.

[0035] The beneficial effect of the present invention is that the ultra-high temperature metallurgical slag molten salt heat exchanger of the present invention comprises: a box body, a metallurgical slag inlet is arranged on the top, and a metallurgical slag outlet is arranged on the bottom; an internal heat exchange assembly is arranged inside the box body; a plurality of side wall heat exchange assemblies are respectively installed on each inner wall of the box body; wherein a support plate is arranged at the lower part of the inner wall of the box body, and a hanging plate for placing on the support plate is arranged on the outer wall of the backpack of the side wall heat exchange assembly, and then the backpack is movably connected to the inner wall of the box body through a tie rod assembly, and the lower end of the backpack and the inner wall of the box body are sealed by an elastic member. In other words, the tie rod assembly of the side wall heat exchange assembly is detachable, the hanging plate is placed on the support plate, and the sealing adopts the design of elastic members, so that the side wall heat exchange assembly does not need to disassemble the heat exchanger as a whole when it fails, and the failed side wall heat exchange assembly can be repaired and replaced online.

[0036] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention are realized and obtained by the structures particularly pointed out in the description and the drawings.

[0037] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0039] Figure 1 This is a front view of the ultra-high temperature metallurgical slag molten salt heat exchanger of the present invention;

[0040] Figure 2 It is a side view of the ultra-high temperature metallurgical slag molten salt heat exchanger of the present invention;

[0041] Figure 3It is a schematic diagram of the ultra-high temperature metallurgical slag molten salt heat exchanger of the present invention with the sealing door opened;

[0042] Figure 4 It is a cross-sectional view of the ultra-high temperature metallurgical slag molten salt heat exchanger of the present invention from a main viewing angle;

[0043] Figure 5 It is a schematic diagram of the cooperation between the side wall heat exchange assembly and the box body of the present invention;

[0044] Figure 6 It is a schematic diagram of the cooperation between the pull rod assembly and the box body of the present invention;

[0045] Figure 7 is a schematic diagram of a side wall heat exchange assembly of the present invention;

[0046] Figure 8 It is a cross-sectional view from a top view of the ultra-high temperature metallurgical slag molten salt heat exchanger of the present invention;

[0047] Fig. 9 yes Figure 8 A partial enlarged view of the

[0048] Fig.10 yes Fig. 9 A partial enlarged view of the .

[0049] In the figure:

[0050] Box body 1, metallurgical slag inlet 11, metallurgical slag outlet 12, support plate 13, positioning angle plate 14, positioning plate 141, groove 142, mounting hole 15, internal heat exchange component 2, side wall heat exchange component 3, backpack 31, hanging plate 311, molten salt heat exchange tube assembly 312, outer wall plate 313, side plate 314, bottom plate 315, inner wall plate 316, flange portion 3161, elastic member 32, pull rod assembly 33, connecting rod 331, limit nut 332, sealing door 4, door opening drive 5, locking device 6, push plate 7, push cylinder 8. DETAILED DESCRIPTION

[0051] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are 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.

[0052] See also Figures 1 to 4 In one embodiment of the present application, the ultra-high temperature metallurgical slag molten salt heat exchanger may include:

[0053] The box body 1 has a metallurgical slag inlet 11 at the top and a metallurgical slag outlet 12 at the bottom;

[0054] An internal heat exchange component 2 is arranged inside the box body 1;

[0055] A plurality of side wall heat exchange components 3 are respectively installed on the inner walls of the box body 1;

[0056] A sealing door 4, one end of which is hinged on a side surface of the box body 1;

[0057] A door opening driver 5, one end of which is mounted on the box body 1, and the other end is connected to the sealing door 4;

[0058] A plurality of locking devices 6, used to lock the sealing door 4 when the sealing door 4 is blocked on the metallurgical slag outlet 12;

[0059] A push plate 7 is arranged in the box body 1; and

[0060] The pushing cylinder 8 is used to drive the pushing plate 7 to push the metallurgical slag in the box body 1 out of the metallurgical slag outlet 12.

[0061] In this embodiment, molten salt can be transported in the heat exchange tubes of the internal heat exchange component 2 and the side wall heat exchange component 3 to perform heat exchange on the metallurgical slag.

[0062] In one application scenario, metallurgical slag enters the box 1 from the metallurgical slag inlet 11, and the internal heat exchange component 2 and the side wall heat exchange component 3 exchange heat with the metallurgical slag; after the waste heat of the metallurgical slag is absorbed, the locking device 6 opens, the door opening driver 5 drives the sealing door 4 to rotate and open around its hinged end, and the pushing cylinder 8 drives the pushing plate 7 to press down, pushing the metallurgical slag out of the metallurgical slag outlet 12. Finally, the door opening driver 5 is reset, driving the sealing door 4 to close, the locking device 6 locks the sealing door 4, and the pushing plate 7 is reset to carry out the next round of waste heat recovery.

[0063] In order to realize the online replacement of the side wall heat exchange assembly 3, see Figure 4 Preferably, a support plate 13 is provided at the lower part of the inner wall of the box body 1; the side wall heat exchange assembly 3 includes: a backpack 31, on the outer wall of which a hanging plate 311 for being placed on the support plate 13 is provided, and a molten salt heat exchange tube assembly 312 is embedded on the inner wall; an elastic member 32 for sealing between the lower end of the backpack 31 and the inner wall of the box body 1; and a pull rod assembly 33 for movably connecting the backpack 31 to the inner wall of the box body 1.

[0064] Optionally, the elastic member 32 includes an arc-shaped member, one end of which is fixed to the outer side wall of the lower end of the backpack 31, and the other end is used to press against the side wall of the box body 1. The arc-shaped member can be a semi-circular tubular elastic member, one side of which can be welded to the backpack 31. Due to thermal expansion and contraction, the gap between the outer wall of the backpack 31 and the inner wall of the box body 1 will change. By providing the elastic member 32 for sealing, it is possible to prevent the metal liquid from entering the gap between the outer wall of the backpack 31 and the inner wall of the box body 1 from the gap between the bottom end of the backpack 31 and the sealing door 4.

[0065] Furthermore, the width of the hanging plate 311 and the width of the supporting plate 13 are both smaller than the width of the elastic member 32. That is, the width of the hanging plate 311 and the supporting plate 13 can allow the backpack 31 to have a certain displacement.

[0066] See also Figure 6 Optionally, the pull rod assembly 33 includes: a connecting rod 331, whose inner end is fixedly connected to the outer wall of the backpack 31, and the outer end extends out of the box body 1 from the mounting hole 15 on the side wall of the box body 1; a limit nut 332, which is arranged on the outer end of the connecting rod 331; wherein when the backpack 31 is deformed by heat, the connecting rod 331 moves outward in the mounting hole 15.

[0067] In this embodiment, when the backpack 31 is deformed by heat, the connecting rod 331 moves outward in the mounting hole 15 ; when the temperature of the metallurgical slag drops and the backpack 31 is reset, the connecting rod 331 can move into the box in the mounting hole 15 .

[0068] In this embodiment, the installation method of the pull rod assembly 33 and the method of placing the backpack 31 on the support plate 13 through the hanging plate 311 can not only install the backpack 31 on the inner wall of the box body 1, but also allow the backpack 31 to be displaced, and it is also convenient for disassembly and assembly when the side wall heat exchange assembly 3 fails.

[0069] join Figure 7 and Fig. 9 Optionally, the backpack 31 includes an outer wall panel 313, a side panel 314, a bottom panel 315 and an inner wall panel 316; a heat-conducting material is arranged in the backpack 31; and the molten salt heat exchange tube assembly 312 is partially exposed on the inner wall panel 316.

[0070] In this embodiment, the outer wall plate 313, the side plate 314, the bottom plate 315 and the inner wall plate 316 can be connected by welding, or several of the plates can be bent into one piece; the internal enclosed space can be filled with heat-conducting material; a number of holes or gaps can be opened on the inner wall plate 316 to expose part of the molten salt heat exchange tube assembly 312, such as one-third of the circumference of the heat exchange tube.

[0071] In this embodiment, see Figure 8The box body 1 can be square, and side wall heat exchange components 3 are arranged on the four inner walls thereof; the four side wall heat exchange components 3 enclose a metallurgical slag channel.

[0072] In this embodiment, in order to prevent the metal liquid from entering the interlayer space between the side wall heat exchange component 3 and the inner wall of the box body 1 through the gap between the side edges of the side wall heat exchange component 3, as an optional sealing method between the side wall heat exchange component 3, see Fig. 9 A positioning angle plate 14 is provided at the inner corner between the inner walls of the box body 1 ; the side edge of the inner wall plate 316 of the backpack 31 is embedded in the positioning angle plate 14 .

[0073] See also Fig.10 Preferably, the positioning angle plate 14 includes two intersecting positioning plates 141, and the intersection of the two positioning plates 141 is provided with a groove 142 facing the inner corner of the box body 1; the side edge of the inner wall plate 316 is provided with a flange portion 3161 extending beyond the side wall of the backpack 31, and the flange portion 3161 is accommodated in the groove 142.

[0074] In this embodiment, the flange portion 3161 is bent toward the outer wall plate 313 of the backpack 31 and is pressed against the inner wall of the groove 142. The flange portion 3161 may have a certain elasticity and may always exert a force on the backpack 31 to move inwardly of the box body 1, so that the limit nut 332 on the connecting rod 331 may be tightened against the outer wall of the box body 1.

[0075] In summary, the ultra-high temperature metallurgical slag molten salt heat exchanger of the present invention can realize the waste heat recovery of ultra-high temperature metallurgical slag; realize the heat exchange between phase change materials and molten salt, and transform the intermittent metallurgical slag heat energy of each steelmaking furnace into continuous molten salt heat energy; the integrated design of the side wall heat exchange component makes the heat exchange more balanced and the resistance to thermal stress is stronger; the detachable side wall heat exchange component realizes the online rapid inspection and maintenance of the heat exchanger.

[0076] The various devices selected in this application (components whose specific structures are not described) are all universal standard parts or components known to technical personnel in this field, and their structures and principles can be known to technical personnel through technical manuals or through conventional experimental methods.

[0077] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection.

[0078] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0079] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. An ultra-high temperature metallurgical slag molten salt heat exchanger, characterized in that: include: The box body (1) is provided with a metallurgical slag inlet (11) at the top and a metallurgical slag outlet (12) at the bottom; An internal heat exchange component (2) is arranged inside the box (1); A plurality of side wall heat exchange components (3) are respectively mounted on the inner walls of the box body (1); in A support plate (13) is provided at the lower part of the inner wall of the box body (1); The side wall heat exchange assembly (3) comprises: A backpack (31) having a hanging plate (311) for being placed on a support plate (13) on its outer wall and a molten salt heat exchange tube assembly (312) embedded on its inner wall; An elastic member (32) for sealing between the lower end of the backpack (31) and the inner wall of the box body (1); and The pull rod assembly (33) is used to movably connect the backpack (31) to the inner wall of the box body (1).

2. The ultra-high temperature metallurgical slag molten salt heat exchanger according to claim 1, characterized in that: The elastic member (32) comprises an arc-shaped member, one end of which is fixed to the outer side wall of the lower end of the backpack (31), and the other end of which is used to press against the side wall of the box body (1).

3. The ultra-high temperature metallurgical slag molten salt heat exchanger according to claim 1, characterized in that: The width of the hanging plate (311) and the width of the supporting plate (13) are both smaller than the width of the elastic member (32).

4. The ultra-high temperature metallurgical slag molten salt heat exchanger according to claim 1, characterized in that: The pull rod assembly (33) comprises: A connecting rod (331), the inner end of which is fixedly connected to the outer wall of the backpack (31), and the outer end of which extends out of the box body (1) through a mounting hole (15) on the side wall of the box body (1); The limiting nut (332) is arranged on the outer end of the connecting rod (331); When the backpack (31) is deformed by heat, the connecting rod (331) moves outward in the mounting hole (15).

5. The ultra-high temperature metallurgical slag molten salt heat exchanger according to claim 1, characterized in that: The backpack (31) comprises an outer wall panel (313), a side panel (314), a bottom panel (315) and an inner wall panel (316); The backpack (31) is provided with a heat-conducting material; The molten salt heat exchange tube assembly (312) is partially exposed on the inner wall plate (316).

6. The ultra-high temperature metallurgical slag molten salt heat exchanger according to claim 5, characterized in that: Positioning angle plates (14) are provided at the inner corners between the inner walls of the box body (1); The side edge of the inner wall plate (316) of the backpack (31) is embedded in the positioning angle plate (14).

7. The ultra-high temperature metallurgical slag molten salt heat exchanger according to claim 6, characterized in that: The positioning angle plate (14) comprises two intersecting positioning plates (141), and a groove (142) facing the inner corner of the box body (1) is provided at the intersection of the two positioning plates (141); The side edge of the inner wall plate (316) is provided with a flange portion (3161) that extends beyond the side wall of the backpack (31), and the flange portion (3161) is accommodated in the groove (142).

8. The ultra-high temperature metallurgical slag molten salt heat exchanger according to claim 7, characterized in that: The flange portion (3161) is bent toward the outer wall plate (313) of the backpack (31) and is pressed against the inner wall of the groove (142).

9. The ultra-high temperature metallurgical slag molten salt heat exchanger according to claim 1, characterized in that: The ultra-high temperature metallurgical slag molten salt heat exchanger also includes: A sealing door (4), one end of which is hinged on a side surface of the box body (1); A door opening driver (5), one end of which is mounted on the box body (1) and the other end of which is connected to the sealing door (4); A plurality of locking devices (6) are used to lock the sealing door (4) when the sealing door (4) is blocked on the metallurgical slag outlet (12).

10. The ultra-high temperature metallurgical slag molten salt heat exchanger according to claim 1, characterized in that: The ultra-high temperature metallurgical slag molten salt heat exchanger also includes: A push plate (7) is arranged in the box body (1); and The pushing oil cylinder (8) is used to drive the pushing plate (7) to push the metallurgical slag in the box (1) out of the metallurgical slag outlet (12).

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