A waste heat recovery system for metallurgical high-temperature solid waste

Abstract

The present application discloses a waste heat recovery system for high-temperature metallurgical solid waste, which relates to the field of waste heat recovery for high-temperature metallurgical waste, and comprises: a slide rail base, which is laid in a closed cave, and a sliding support is slidably arranged on the slide rail base, a storage water tank is arranged inside the slide rail base, and cooling water is injected and discharged through the tank interface, and an auxiliary component is arranged between the sliding support and the slide rail base, and the auxiliary component is fitted and fixed on the lower end surface of the sliding support, and the auxiliary component is connected to the storage water tank; a waste slag bin, which is arranged above the sliding support, and a wind gathering piece is arranged on the waste slag bin; a waste heat storage piece, which is arranged on one side of the auxiliary component, and the waste heat storage piece is connected to the storage water tank, and is used for transferring the heat transferred from the waste slag bin to the cooling water by heat conduction.

Description

Technical Field

[0001] The present application relates to the field of waste heat recovery from metallurgical high-temperature waste slag, and in particular to a waste heat recovery system for metallurgical high-temperature solid waste slag. Background Art

[0002] Modern steel industry production can produce a large amount of slag with high temperature sensible heat while obtaining main products such as molten iron and molten steel. According to statistics, 100-150kg of hot molten steel slag will be produced in every ton of molten steel, and the temperature is usually as high as 1600℃. However, the high-temperature waste heat of these hot slags is usually simply discharged into the atmosphere, which not only causes huge energy waste but also brings environmental pollution. Therefore, if the waste heat of hot slag can be reasonably recycled and utilized, it can not only reduce energy consumption, but also reduce emissions. At the same time, slag can be used to develop high-value-added product materials, expand the application field of slag, realize resource recycling, and improve the sustainability of steel industry production.

[0003] After the hot steel slag is transported out from the slag discharge site, most of it is cooled through different processes, and then crushed, ground, magnetically separated, and screened to recover the magnetic iron-containing raw materials in the slag, resulting in a large amount of preheating loss in the hot steel slag, and the recovery effect of hot steel waste heat is poor. In addition, the resource utilization of hot steel slag is also difficult, affected by the performance characteristics of the hot steel slag itself, such as low thermal conductivity, large composition fluctuations, high temperature, high phosphorus content, high free CaO content, viscosity that increases sharply with decreasing temperature, the contradiction between intermittent slag discharge and continuous heat utilization, etc., it is difficult to connect well with the production rhythm of the steelmaking process.

[0004] Therefore, it is necessary to provide a metallurgical high-temperature solid waste heat recovery system to solve the problems raised in the above background technology. Summary of the invention

[0005] To achieve the above purpose, the present application provides the following technical solution: a metallurgical high-temperature solid waste slag waste heat recovery system, comprising:

[0006] A slide rail base is laid in a closed cave, and a slide support is slidably arranged on the slide rail base, a storage water tank is arranged inside the slide rail base, and cooling water is injected and discharged through the tank interface, and an auxiliary component is arranged between the slide support and the slide rail base, and the auxiliary component is fitted and fixed on the lower end surface of the slide support, and the auxiliary component is communicated with the storage water tank;

[0007] A waste residue bin is arranged above the sliding support, and a wind gathering member is arranged on the waste residue bin;

[0008] A waste heat storage component is arranged on one side of the auxiliary component and is connected to the storage water tank, and is used to transfer the heat transferred from the waste slag bin to the cooling water by heat conduction.

[0009] Further, preferably, the sliding support comprises a flat heat conducting plate frame and a guide groove arranged below the heat conducting plate frame, and the heat conducting plate frame is provided with a dovetail groove for mounting a movable pad.

[0010] Furthermore, preferably, an inlet is provided at an upper end surface of the waste slag bin, and a discharge port is provided at a side end of the waste slag bin.

[0011] Further, as a preference, the wind gathering member is divided into two parts, a head seat and a tail seat, and the head seat and the tail seat are symmetrically distributed on both sides of the waste slag bin, the head seat and the tail seat both penetrate the waste slag bin wall, and the head seat is provided with a main air outlet connected to the interior of the waste slag bin, and a secondary air outlet is provided on the head seat.

[0012] Further, as a preference, the head seat is composed of a plurality of bosses, and a plurality of auxiliary air outlets are provided through-through the side walls of the bosses.

[0013] Further, preferably, the auxiliary component comprises:

[0014] An adapter shell is fixedly arranged at the lower end of the sliding support, and a ventilation window is opened on the side wall of the adapter shell along the axis direction of the wind gathering member;

[0015] A heat sink is disposed in the adapter shell, and a plurality of heat sinks are disposed in parallel and spaced apart, and the heat sink is made of a heat-conducting material;

[0016] A circulation pipe, which is formed by splicing a plurality of curved pipe sections, the circulation pipe is interspersed with the heat sink at intervals, and both ends of the circulation pipe extend through the side wall of the adapter shell and are externally connected to the storage tank;

[0017] The necked air duct is arranged at intervals between the heat dissipation plates, and the necked air duct is arranged close to the ventilation window.

[0018] Further, as a preference, the necked air duct is a square bent tube with a sunken groove in the middle, the end of the necked air duct facing the ventilation window is an air inlet, and the end facing the upper end surface of the adapter shell is an air outlet.

[0019] Further, as a preference, the waste heat storage component includes: a fixed bracket fixed to the side wall of the adapter shell, the fixed brackets are arranged in parallel in two, and a heat storage tube 1 and a heat storage tube 2 are arranged in parallel between the two fixed brackets, the heat storage tube 1 and the heat storage tube 2 are connected by a connecting tube, and heat conductive rods are evenly distributed on the cylindrical wall of the heat storage tube 1.

[0020] Further, as a preference, the heat conductive rod extends through the interior of the adapter shell and passes through the heat sink. In addition, both ends of the heat storage tube extend to the storage water tank, and a water pump is provided in the storage water tank to connect to one end of the heat storage tube.

[0021] Compared with the prior art, the present application provides a waste heat recovery system for metallurgical high-temperature solid waste slag, which has the following beneficial effects:

[0022] In the present application, the waste slag heat is quickly converted into water with higher specific heat capacity by heat conduction through waste heat storage components for storage. The waste slag heat is reduced in time to enter the next process. Based on the intermittent nature of slag discharge, while waiting for new waste slag to be produced, heat exchange is continuously carried out through heat conduction with the air through auxiliary components, and the subsequent hot air output heat is recycled to ensure operation continuity. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0024] Figure 1 It is a schematic diagram of the overall structure of a waste heat recovery system for metallurgical high-temperature solid waste;

[0025] Figure 2 It is a schematic diagram of the sliding support structure of a metallurgical high-temperature solid waste slag waste heat recovery system;

[0026] Figure 3 This is a schematic diagram of the structure of auxiliary components of a waste heat recovery system for metallurgical high-temperature solid waste;

[0027] Figure 4 It is a schematic diagram of the shrinking duct structure of a waste heat recovery system for high-temperature solid waste slag in metallurgy;

[0028] Figure 5 It is a schematic diagram of the structure of a waste heat storage component of a waste heat recovery system for metallurgical high-temperature solid waste slag;

[0029] In the figure: 1. Slide rail base; 11. Slot interface; 12. Storage tank; 2. Sliding support; 21. Heat conduction plate frame; 22. Guide groove; 23. Dovetail groove; 24. Movable pad; 3. Auxiliary component; 31. Adapter shell; 32. Heat sink; 33. Circulation pipe; 34. Neck shrinkage duct; 341. Air inlet; 342. Recessed groove; 343. Exhaust outlet; 4. Waste slag bin; 41. Feed inlet; 42. Discharge outlet; 5. Wind gathering piece; 51. Head seat; 511. Main air outlet; 512. Auxiliary air outlet; 52. Tail seat; 6. Waste heat storage piece; 61. Fixed bracket; 62. Heat storage tube one; 63. Heat storage tube two; 64. Heat conduction rod; 65. Connecting pipe. DETAILED DESCRIPTION

[0030] See also Figure 1 In an embodiment of the present application, a metallurgical high-temperature solid waste slag waste heat recovery system comprises:

[0031] A slide rail base 1 is laid in a closed cave, and a slide support 2 is slidably arranged on the slide rail base 1, a storage water tank 12 is arranged inside the slide rail base 1, and cooling water is injected and discharged through a tank interface 11, and an auxiliary component 3 is arranged between the slide support 2 and the slide rail base 1, and the auxiliary component 3 is fitted and fixed on the lower end surface of the slide support 2, and the auxiliary component 3 is communicated with the storage water tank 12;

[0032] A waste residue bin 4 is arranged above the sliding support 2, and a wind gathering member 5 is arranged on the waste residue bin 4;

[0033] The waste heat storage component 6 is arranged on one side of the auxiliary component 3, and the waste heat storage component 6 is connected to the storage water tank 12, and is used to transfer the heat transferred from the waste residue bin 4 to the cooling water by heat conduction.

[0034] It needs to be explained that in the cave with controllable openings, through-wind is introduced for heat exchange and utilized through hot air output. During this period, waste slag is placed in the waste slag bin 4, and the sliding support 2 slides at a uniform speed along the slide rail base 1. During this period, the auxiliary component 3 and the waste heat storage component 6 remain connected to the storage water tank 12. The auxiliary component 3 mainly exchanges heat with the air through circulating cooling water to provide continuous heat output, while the waste heat storage component 6 mainly exchanges heat with the waste slag bin 4 through heat conduction through circulating cooling water, so that the heat in the waste slag is transferred to the cooling water with higher specific heat capacity in a more efficient way. After the heat exchange is completed, the steel slag with residual temperature is finely crushed and iron is selected for secondary selection, and finally metal iron blocks, iron particles and steel slag tailings and other products are obtained. The remaining steel slag tailings are directly carbon-fixed to produce negative carbon materials, high-strength and high-performance negative carbon aggregates, negative carbon cementitious materials, or carbon-fixed by quality to produce 50%-55% iron concentrate and ultrafine calcium carbonate.

[0035] As a preferred embodiment, the sliding support 2 includes a flat heat conducting plate frame 21 and a guide groove 22 arranged below the heat conducting plate frame 21 , and a dovetail groove 23 for mounting a movable pad 24 is arranged on the heat conducting plate frame 21 .

[0036] As a preferred embodiment, an inlet 41 is provided on the upper end surface of the waste slag bin 4 , and a discharge port 42 is provided on the side end of the waste slag bin 4 .

[0037] As a preferred embodiment, the wind gathering member 5 is divided into two parts, namely a head seat 51 and a tail seat 52, and the head seat 51 and the tail seat 52 are symmetrically distributed on both sides of the waste slag bin 4. The head seat 51 and the tail seat 52 both penetrate the bin wall of the waste slag bin 4. In addition, the head seat 51 is provided with a main air outlet 511 connected to the inside of the waste slag bin 4, and a secondary air outlet 512 is provided on the head seat 51.

[0038] As a preferred embodiment, the head seat 51 is composed of a plurality of bosses, and a plurality of auxiliary air outlets 512 are provided through the side walls of the bosses.

[0039] In this embodiment, Figure 3 , the auxiliary component 3 comprises:

[0040] The adapter shell 31 is fixedly arranged at the lower end of the sliding support 2, and a ventilation window is opened on the side wall of the adapter shell 31 along the axial direction of the wind gathering member 5;

[0041] The heat sink 32 is disposed in the adapter shell 31, and a plurality of heat sinks 32 are disposed in parallel and spaced apart. The heat sink 32 is made of a heat-conducting material. Specifically, the heat sink 32 is used as a heat dissipation medium to promote the heat in the cooling water to be replaced by the air for subsequent use.

[0042] The circulation pipe 33 is formed by splicing a plurality of curved pipe sections. The circulation pipe 33 is interspersed with the heat dissipation plate 32 at intervals, and both ends of the circulation pipe 33 extend through the side wall of the adapter shell 31 and are externally connected to the storage tank 12.

[0043] The constricted air duct 34 is disposed between the heat dissipation plates 32 at intervals, and the constricted air duct 34 is disposed close to the ventilation window.

[0044] As a preferred embodiment, the necked air duct 34 is a square bent tube with a sunken groove 343 in the middle. The end of the necked air duct 34 facing the ventilation window is an air inlet 341, and the end facing the upper end surface of the adapter shell 31 is an air outlet 342.

[0045] It needs to be explained that when the liquid slag solidifies, exchanges heat and cools down to a certain temperature, there will be a solidification and crusting phenomenon on the inner surface of the waste slag bin 4. The air flow generates vibration through the necked air duct 34, and the vibration is transmitted to the waste slag bin 4, causing the clean skin layer of the slag to break and peel off from the basin wall, which is conducive to pouring the slag out of the waste slag bin 4.

[0046] In this embodiment, Figure 5The waste heat storage element 6 includes: a fixing bracket 61 fixed to the side wall of the adapter shell 31, the fixing bracket 61 is arranged in parallel in two, and a heat storage tube 1 62 and a heat storage tube 2 63 are arranged in parallel between the two fixing brackets 61, the heat storage tube 1 62 and the heat storage tube 2 63 are connected by a connecting pipe 65, and heat conductive rods 64 are evenly distributed on the cylindrical wall of the heat storage tube 1 62.

[0047] As a preferred embodiment, the heat conductive rod 64 extends through the interior of the adapter shell 31 and passes through the heat sink 32. In addition, both ends of the heat storage tube 62 extend to the storage water tank 12, and a water pump is provided in the storage water tank 12 to connect the head end of the heat storage tube 62.

[0048] It needs to be explained that the waste slag heat is quickly converted into water with higher specific heat capacity by heat conduction through the waste heat storage component 6 for storage, and the waste slag heat is reduced in time to enter the next process. Based on the intermittent nature of slag discharge, while waiting for new waste slag to be produced, heat exchange is continuously carried out through heat conduction with the air through the auxiliary component 3, and the subsequent hot air output heat is recycled to ensure operation continuity.

[0049] What has been described above is only a preferred specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes within the technical scope disclosed in the present application according to the technical solution and application concept of the present application, which should be covered by the protection scope of the present application.

Claims

1. A waste heat recovery system for metallurgical high-temperature solid waste, characterized by: include: A slide rail base (1) is laid in a closed cave, and a slide support (2) is slidably arranged on the slide rail base (1), a storage water tank (12) is arranged inside the slide rail base (1), and cooling water is injected and discharged through a tank interface (11), and an auxiliary component (3) is arranged between the slide support (2) and the slide rail base (1), and the auxiliary component (3) is fixed to the lower end surface of the slide support (2), and the auxiliary component (3) is communicated with the storage water tank (12); A waste residue bin (4) is arranged above the sliding support (2), and a wind gathering member (5) is arranged on the waste residue bin (4); A waste heat storage element (6) is arranged on one side of the auxiliary component (3), and the waste heat storage element (6) is connected to the storage water tank (12), and is used to transfer the heat transferred from the waste residue bin (4) to the cooling water by heat conduction; The auxiliary component (3) comprises: An adapter shell (31) is fixedly arranged at the lower end of the sliding support (2), and a ventilation window is provided on the side wall of the adapter shell (31) along the axial direction of the wind gathering member (5); A heat dissipation plate (32) is arranged in the adapter shell (31), and a plurality of heat dissipation plates (32) are arranged in parallel and at intervals, and the heat dissipation plates (32) are made of a heat-conducting material; The circulation pipe (33) is formed by splicing a plurality of curved pipe sections, the circulation pipe (33) is inserted through the heat dissipation plate (32) at intervals, and both ends of the circulation pipe (33) extend through the side wall of the adapter shell (31) and are externally connected to the storage tank (12); A constricted air duct (34) is arranged at intervals between the heat dissipation plates (32), and the constricted air duct (34) is arranged close to the ventilation window; The necked air duct (34) is a square bent tube with a sunken groove (343) in the middle. The end of the necked air duct (34) facing the ventilation window is an air inlet (341), and the end facing the upper end surface of the adapter shell (31) is an air outlet (342).

2. A metallurgical high-temperature solid waste heat recovery system according to claim 1, characterized in that: The sliding support (2) comprises a flat heat-conducting plate frame (21) and a guide groove (22) arranged below the heat-conducting plate frame (21), and a dovetail groove (23) for mounting a movable pad (24) is arranged on the heat-conducting plate frame (21).

3. A metallurgical high-temperature solid waste slag waste heat recovery system according to claim 1, characterized in that: The upper end surface of the waste residue bin (4) is provided with an inlet (41), and the side end of the waste residue bin (4) is provided with an outlet (42).

4. The metallurgical high-temperature solid waste heat recovery system according to claim 1 is characterized by: The wind gathering member (5) is divided into two parts, namely a head seat (51) and a tail seat (52), and the head seat (51) and the tail seat (52) are symmetrically distributed on both sides of the waste residue bin (4). Both the head seat (51) and the tail seat (52) penetrate the bin wall of the waste residue bin (4). In addition, the head seat (51) is provided with a main air outlet (511) connected to the interior of the waste residue bin (4), and a secondary air outlet (512) is provided on the head seat (51).

5. A metallurgical high-temperature solid waste slag waste heat recovery system according to claim 4, characterized in that: The head seat (51) is composed of a plurality of bosses, and a plurality of auxiliary air outlets (512) are provided through the side walls of the bosses.

6. The metallurgical high-temperature solid waste slag waste heat recovery system according to claim 1, characterized in that: The residual heat storage element (6) comprises: a fixing bracket (61) fixed to the side wall of the adapter shell (31), the fixing bracket (61) being arranged in parallel in two, and a heat storage pipe 1 (62) and a heat storage pipe 2 (63) being arranged in parallel between the two fixing brackets (61), the heat storage pipe 1 (62) and the heat storage pipe 2 (63) being connected via a connecting pipe (65), and heat conducting rods (64) being evenly distributed on the cylindrical wall of the heat storage pipe 1 (62).

7. A metallurgical high-temperature solid waste heat recovery system according to claim 6, characterized in that: The heat conducting rod (64) extends into the interior of the adapter shell (31) and passes through the heat sink (32). In addition, both ends of the heat storage tube (62) extend to the storage water tank (12), and a water pump connected to the head end of the heat storage tube (62) is provided in the storage water tank (12).

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