A blast furnace circulating cooling water waste heat recovery device

Abstract

The utility model belongs to the technical field of waste heat recovery device, concretely relates to a waste heat recovery device of blast furnace circulating cooling water, include: heat exchange case, guide flow filter mechanism and reciprocating heat exchange mechanism. Guide flow filter mechanism fixedly arranged in heat exchange case, guide flow filter mechanism includes assembly sealing plate and multiple sets of filter screen cylinder. Reciprocating heat exchange mechanism sets up below multiple sets of filter screen cylinder, reciprocating heat exchange mechanism includes upper heat exchange plate, lower heat exchange plate and multiple sets of guide flow heat exchange plate, and the cooperation of upper heat exchange plate, lower heat exchange plate and multiple sets of guide flow heat exchange plate forms multiple heat delivery cavities and cold guide flow cavities, and multiple heat delivery cavities and cold guide flow cavities are staggered arrangement. The waste heat recovery device of blast furnace circulating cooling water disclosed by the utility model can carry out filter treatment to the backflow high temperature cooling water through the setting of guide flow filter mechanism and reciprocating heat exchange mechanism, increase the area of heat exchange area, and improve the high efficiency of heat exchange.

Description

Technical Field

[0001] This utility model belongs to the technical field of waste heat recovery devices, specifically relating to a waste heat recovery device for blast furnace circulating cooling water. Background Technology

[0002] Blast furnace circulating cooling water is a circulating water system used in industrial production to cool blast furnace equipment. It primarily removes the heat generated during blast furnace operation through heat exchange, thus preventing overheating and damage. Currently, after heat exchange, the blast furnace cooling water is typically transported to a cooling tower for further cooling, and the cooled water then continues to cool the blast furnace.

[0003] While this method allows cooling water to circulate and cool the blast furnace equipment, the cooling water carries heat after heat exchange. This heat is directly released into the environment, causing adverse effects and wasting resources. Existing waste heat recovery devices typically utilize waste heat by passing high-temperature cooling water through heat exchange tubes for heat exchange. Although these devices can recover waste heat, the contact between the heat exchange tubes and the heat exchange fluid is poor. Furthermore, they do not consider the presence of impurities in the cooling water, resulting in poor waste heat recovery and the heat exchange tubes being prone to blockage due to impurities during practical applications.

[0004] Therefore, in order to address the above-mentioned technical problems, it is necessary to provide a waste heat recovery device for blast furnace circulating cooling water.

[0005] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0006] The purpose of this invention is to provide a waste heat recovery device for blast furnace circulating cooling water, which can efficiently recover waste heat from blast furnace circulating cooling water.

[0007] To achieve the above objectives, the technical solution provided by a specific embodiment of this utility model is as follows:

[0008] A waste heat recovery device for blast furnace circulating cooling water includes: a heat exchange box, a flow guiding and filtering mechanism, and a reciprocating heat exchange mechanism.

[0009] The flow guiding and filtering mechanism is fixedly installed inside the heat exchange box. The flow guiding and filtering mechanism includes an assembly sealing plate and multiple sets of filter screens. The assembly sealing plate is fixedly connected to the inner wall of the heat exchange box, and the multiple sets of filter screens are evenly inserted into the assembly sealing plate for filtering impurities from the high-temperature cooling water.

[0010] The reciprocating heat exchange mechanism is located below multiple sets of filter screens. The reciprocating heat exchange mechanism includes an upper heat exchange plate, a lower heat exchange plate, and multiple sets of flow guiding heat exchange plates. The upper and lower heat exchange plates are fixedly installed inside the heat exchange box. The multiple sets of flow guiding heat exchange plates are fixedly installed between the upper and lower heat exchange plates. The upper heat exchange plate, the lower heat exchange plate, and the multiple sets of flow guiding heat exchange plates cooperate to form multiple heat delivery chambers and cold flow guiding chambers. The multiple heat delivery chambers and cold flow guiding chambers are arranged alternately.

[0011] In one or more embodiments of this utility model, a cover is fixedly installed on the top of the heat exchange box. The cover and the heat exchange box cooperate to form a semi-enclosed heat exchange box body. A liquid filling pipe is fixedly connected to the top of the cover, through which high-temperature cooling water is transported into the cover. A drain pipe is fixedly connected to the bottom of the heat exchange box, through which the high-temperature cooling water after heat exchange is discharged from the heat exchange box.

[0012] In one or more embodiments of this utility model, the assembly sealing plate is sealed to the heat exchange box, and the upper side of the assembly sealing plate and the box cover cooperate to form a flow guiding cavity, and the liquid adding pipe is connected to the flow guiding cavity. The flow guiding cavity limits and guides the high-temperature cooling water added by the liquid adding pipe, thereby enabling multiple sets of filter screens to filter impurities from the high-temperature cooling water.

[0013] In one or more embodiments of this utility model, the flow guiding and filtering mechanism further includes a flow collecting plate and a guide pipe. The flow collecting plate is fixedly installed inside the heat exchange box and located below multiple sets of filter screens. The flow collecting plate guides and transports the high-temperature cooling water filtered by the multiple sets of filter screens. One end of the guide pipe is connected to the flow collecting plate, and the other end is connected to the heat transfer chamber. The guide pipe serves to connect the flow collecting plate and the heat transfer chamber, facilitating the transport of the filtered high-temperature cooling water in the flow collecting plate to the heat transfer chamber along the guide pipe.

[0014] In one or more embodiments of this utility model, limiting grooves are formed on the side of the upper and lower heat exchange plates that are close to each other, and on both sides of the flow guiding heat exchange plate, and sealing rings are provided in the limiting grooves. By forming limiting grooves to limit the assembly of sealing rings, and by setting sealing rings on the upper heat exchange plate, lower heat exchange plate and multiple sets of flow guiding heat exchange plates, the sealing performance between the heat transfer cavity and the cold flow guiding cavity is ensured.

[0015] In one or more embodiments of this utility model, multiple sets of heat exchange plates are connected by multiple heat-conducting circulation pipes. These heat-conducting circulation pipes are symmetrically arranged on both sides of the heat exchange plates, and their ends are respectively connected to the upper and lower heat transport chambers. The high-temperature cooling water flows in a Z-shaped reciprocating motion from top to bottom under the guidance of the heat transport chambers and the multiple heat-conducting circulation pipes. This facilitates the reciprocating flow and transport of the high-temperature cooling water within the heat transport chambers through the multiple heat-conducting circulation pipes.

[0016] In one or more embodiments of this utility model, a hot drain pipe is fixedly connected below the lower heat exchange plate. One end of the hot drain pipe is connected to the heat transfer chamber, and the other end is connected to a drain pipe. The high-temperature cooling water after heat exchange in the heat transfer chamber is discharged through the hot drain pipe.

[0017] In one or more embodiments of this utility model, multiple sets of heat exchange plates are connected by multiple cold flow circulation pipes. These multiple cold flow circulation pipes are symmetrically arranged on both sides of the heat exchange plates, and both ends of each cold flow circulation pipe are connected to a cold flow cavity. The heat exchange fluid circulates within the multiple cold flow cavities through these multiple cold flow circulation pipes.

[0018] In one or more embodiments of this utility model, a cold liquid injection pipe is provided below the lower heat exchange plate, and one end of the cold liquid injection pipe is connected to the cold flow guiding cavity. Heat exchange fluid is supplied to the cold flow guiding cavity through the cold liquid injection pipe. A cold liquid discharge pipe is provided above the upper heat exchange plate, one end of the cold liquid discharge pipe is connected to the cold flow guiding cavity, and the other ends of both the cold liquid injection pipe and the cold liquid discharge pipe penetrate the heat exchange box. The heat exchange fluid after heat exchange in the cold flow guiding cavity is discharged through the cold liquid discharge pipe.

[0019] In one or more embodiments of this utility model, a heat exchange fluid is transported in the cold guide cavity, and the heat exchange fluid flows back and forth in a Z-shape from bottom to top along the cold liquid filling pipe, the cold guide cavity, multiple sets of cold guide circulation pipes and the cold liquid draining pipe.

[0020] Compared with the prior art, the waste heat recovery device for blast furnace circulating cooling water disclosed in this utility model can filter impurities from the returned high-temperature cooling water by setting a flow guiding and filtering mechanism, thereby reducing the adverse effects of subsequent impurities on the heat exchange process.

[0021] By setting up a reciprocating heat exchange mechanism, the area of ​​the heat exchange zone can be increased, thereby improving the efficiency of heat exchange. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a cross-sectional perspective view of a waste heat recovery device for blast furnace circulating cooling water in one embodiment of the present invention;

[0024] Figure 2 for Figure 1 Schematic diagram of the structure at point A in the middle;

[0025] Figure 3 for Figure 1 Schematic diagram of the structure at point B;

[0026] Figure 4 This is a partial structural schematic diagram of a waste heat recovery device for blast furnace circulating cooling water in one embodiment of the present invention.

[0027] Figure 5 This is a schematic diagram of the structure of the upper heat exchange plate, the lower heat exchange plate, and the flow guiding heat exchange plate in one embodiment of the present invention;

[0028] Figure 6 This is a front sectional view of a waste heat recovery device for blast furnace circulating cooling water in one embodiment of the present invention;

[0029] Figure 7 for Figure 6 Schematic diagram of the structure at point C;

[0030] Figure 8 This is a perspective view of a waste heat recovery device for blast furnace circulating cooling water in one embodiment of the present invention.

[0031] Explanation of key figure labels:

[0032] 1-Heat exchange box, 101-Box cover, 102-Liquid filling pipe, 103-Liquid drain pipe, 2-Flow guiding and filtration mechanism, 201-Assembled sealing plate, 202-Filter screen cylinder, 203-Collector plate, 204-Guide pipe, 3-Reciprocating heat exchange mechanism, 301-Upper heat exchange plate, 302-Lower heat exchange plate, 303-Flow guiding heat exchange plate, 304-Sealing ring, 305-Hot flow guiding circulation pipe, 306-Hot drain pipe, 307-Cold flow guiding circulation pipe, 308-Cold liquid filling pipe, 309-Cold drain pipe. Detailed Implementation

[0033] To enable those skilled in the art to better understand the technical solutions in this disclosure, the technical solutions in the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this disclosure.

[0034] like Figures 1 to 8 As shown, a waste heat recovery device for blast furnace circulating cooling water in one embodiment of this utility model includes: a heat exchange box 1, a flow guiding and filtering mechanism 2, and a reciprocating heat exchange mechanism 3. In practical applications, the flow guiding and filtering mechanism 2 filters impurities from the high-temperature cooling water for waste heat recovery, and the reciprocating heat exchange mechanism 3 recovers heat from the high-temperature cooling water.

[0035] Specifically, the heat exchange box 1 has a heat preservation function, which reduces the heat loss generated during the transportation of high-temperature cooling water and heat exchange fluid.

[0036] like Figure 1 As shown, a cover 101 is fixedly installed on the top of the heat exchange box 1. The cover 101 and the heat exchange box 1 cooperate to form a semi-enclosed heat exchange box. A liquid filling pipe 102 is fixedly connected to the top of the cover 101, through which high-temperature cooling water is transported into the cover 101. A drain pipe 103 is fixedly connected to the bottom of the heat exchange box 1. The high-temperature cooling water after heat exchange in the heat exchange box 1 is discharged through the drain pipe 103.

[0037] Specifically, the cover 101 can be fixedly installed on top of the heat exchange box 1 by means of bolt connection.

[0038] Among them, a flange is fixedly connected to one end of the liquid filling pipe 102 and the liquid draining pipe 103, which improves the convenience of connecting the liquid filling pipe 102 and the liquid draining pipe 103 to the external conveying pipeline.

[0039] like Figure 6 As shown, the flow guiding and filtering mechanism 2 is fixedly installed inside the heat exchange box 1. The flow guiding and filtering mechanism 2 includes an assembly sealing plate 201 and multiple sets of filter screens 202. The assembly sealing plate 201 is fixedly connected to the inner wall of the heat exchange box 1. The assembly sealing plate 201 guides and transports high-temperature cooling water and also limits the assembly of the multiple sets of filter screens 202. The multiple sets of filter screens 202 can filter impurities from the transported high-temperature cooling water, reducing the possibility of blockage in the subsequent heat transfer chamber and cold flow guiding chamber due to impurities.

[0040] Specifically, the sealing plate 201 is sealed to the heat exchange box 1, and the upper side of the sealing plate 201 and the box cover 101 cooperate to form a flow guide cavity, through which the liquid filling pipe 102 is connected. The flow guide cavity limits and guides the high-temperature cooling water added by the liquid filling pipe 102, thereby enabling the multiple sets of filter screens 202 to filter impurities from the high-temperature cooling water.

[0041] like Figures 1 to 2 As shown, multiple sets of filter screens 202 are evenly inserted and arranged within the assembly sealing plate 201. The multiple sets of filter screens 202 filter impurities from the high-temperature cooling water, ensuring the stability of subsequent waste heat recovery from the high-temperature cooling water.

[0042] Specifically, the filter screen cylinder 202 can be fixedly connected to the assembly sealing plate 201 by means of bolts and sealing washers.

[0043] When it is necessary to clean or replace the filter screen 202, the cover 101 is separated from the heat exchange box 1, and then the filter screen 202 is disassembled by pulling it out. The filter screen 202 can then be cleaned or replaced according to the actual situation.

[0044] like Figure 1 and Figure 4 As shown, the flow guiding and filtering mechanism 2 also includes a flow collecting plate 203 and a guide pipe 204. The flow collecting plate 203 is fixedly installed inside the heat exchange box 1 and is located below the multiple sets of filter screens 202. The flow collecting plate 203 guides and transports the high-temperature cooling water filtered by the multiple sets of filter screens 202.

[0045] like Figure 1 and Figure 4 As shown, one end of the guide pipe 204 is connected to the manifold 203, and the other end of the guide pipe 204 is connected to the heat transfer chamber. The guide pipe 204 serves to connect the manifold 203 and the heat transfer chamber, facilitating the transport of the filtered high-temperature cooling water in the manifold 203 to the heat transfer chamber via the guide pipe 204.

[0046] like Figure 6 As shown, the reciprocating heat exchange mechanism 3 is located below multiple sets of filter screen cylinders 202. The reciprocating heat exchange mechanism 3 includes an upper heat exchange plate 301, a lower heat exchange plate 302, and multiple sets of flow-guiding heat exchange plates 303. Through the cooperation of the upper heat exchange plate 301, the lower heat exchange plate 302, and the multiple sets of flow-guiding heat exchange plates 303, the high-temperature cooling water and heat exchange fluid are guided, transported, and heat exchanged, thereby achieving the purpose of waste heat recovery from the high-temperature cooling water.

[0047] like Figures 1 to 5As shown, the upper heat exchange plate 301 and the lower heat exchange plate 302 are both fixedly installed inside the heat exchange box 1. Multiple sets of flow-guiding heat exchange plates 303 are fixedly installed between the upper heat exchange plate 301 and the lower heat exchange plate 302. The upper heat exchange plate 301, the lower heat exchange plate 302, and the multiple sets of flow-guiding heat exchange plates 303 cooperate to form multiple heat delivery chambers and cold flow guiding chambers, which are arranged alternately. High-temperature cooling water is guided and transported through the heat delivery chambers, and the heat exchange fluid is guided and transported through the cold flow guiding chambers. By alternating the heat delivery chambers and cold flow guiding chambers, the contact area between the high-temperature cooling water and the heat exchange fluid is increased, thereby improving the heat exchange effect.

[0048] like Figure 5 As shown, limiting grooves are provided on the side of the upper heat exchange plate 301 and the lower heat exchange plate 302 that are in close contact with each other, and on both sides of the flow guiding heat exchange plate 303. A sealing ring 304 is provided in the limiting groove. The sealing ring 304 is assembled and limited by providing limiting grooves. The sealing ring 304 is provided on the upper heat exchange plate 301, the lower heat exchange plate 302 and the multiple sets of flow guiding heat exchange plates 303 to ensure the sealing of the heat transfer cavity and the cold flow guiding cavity.

[0049] like Figures 1 to 3 As shown, multiple sets of heat exchange plates 303 are connected by multiple heat-conducting circulation pipes 305. These pipes are symmetrically arranged on both sides of the heat exchange plates 303, with both ends connected to the upper and lower heat transfer chambers respectively. High-temperature cooling water flows in a Z-shaped reciprocating motion from top to bottom under the guidance of the heat transfer chambers and the multiple heat-conducting circulation pipes 305. This facilitates the reciprocating flow and transport of the high-temperature cooling water within the heat transfer chambers through the multiple heat-conducting circulation pipes 305.

[0050] like Figure 6 As shown, a hot drain pipe 306 is fixedly connected to the lower heat exchange plate 302. One end of the hot drain pipe 306 is connected to the heat transfer chamber, and the other end is connected to the drain pipe 103. The high-temperature cooling water after heat exchange in the heat transfer chamber is discharged through the hot drain pipe 306.

[0051] like Figures 6 to 7 As shown, multiple sets of heat exchange plates 303 are connected by multiple cold flow circulation pipes 307. The multiple cold flow circulation pipes 307 are symmetrically arranged on both sides of the heat exchange plates 303, and both ends of the multiple cold flow circulation pipes 307 are connected to the cold flow chambers. The heat exchange fluid flows through the multiple cold flow circulation pipes 307.

[0052] like Figures 6 to 7As shown, a cold liquid injection pipe 308 is disposed below the lower heat exchange plate 302, with one end of the cold liquid injection pipe 308 connected to the cold flow guiding cavity. Heat exchange fluid is supplied to the cold flow guiding cavity through the cold liquid injection pipe 308. A cold liquid discharge pipe 309 is disposed above the upper heat exchange plate 301, with one end of the cold liquid discharge pipe 309 connected to the cold flow guiding cavity. The other ends of both the cold liquid injection pipe 308 and the cold liquid discharge pipe 309 penetrate the heat exchange box 1. The heat exchange fluid after heat exchange in the cold flow guiding cavity is discharged through the cold liquid discharge pipe 309.

[0053] Specifically, the cold flow cavity carries heat exchange fluid, which flows back and forth in a Z-shape from bottom to top along the cold liquid filling pipe 308, the cold flow cavity, multiple sets of cold flow circulation pipes 307 and cold liquid discharge pipe 309.

[0054] The heat exchange fluid is water with a lower temperature. The waste heat of the high-temperature cooling water is recovered by heating the lower-temperature water, which facilitates subsequent recycling and reuse.

[0055] In practical use, the liquid addition pipe 102 is connected to the drain pipe of the blast furnace circulating cooling water, and the liquid discharge pipe 103 is connected to the water inlet pipe of the cooling tower. At the same time, the water inlet pipe of the heat exchange fluid is connected to the cold liquid addition pipe 308.

[0056] When the blast furnace circulating cooling water is transported to the heat exchange box 1 along the liquid injection pipe 102, it is guided by the sealing plate 201 and filtered by multiple sets of filter screens 202 before being concentrated in the collector plate 203. Subsequently, the filtered high-temperature cooling water flows into the heat transfer chamber along the guide pipe 204. The high-temperature cooling water flows back and forth in a Z-shape along the heat transfer chamber and multiple heat flow circulation pipes 305 and heat discharge pipes 306, and can be transported to the cooling tower along the heat discharge pipes 306 and discharge pipes 103.

[0057] Meanwhile, the heat exchange fluid can be transported along the cold filling pipe 308 to the cold guiding cavity, and under the guiding action of the cold filling pipe 308, the cold guiding cavity, multiple cold guiding circulation pipes 307, and the cold drain pipe 309, it flows back and forth in a Z-shape from bottom to top. The heat exchange fluid in the cold guiding cavity can absorb heat from the high-temperature cooling water, thereby realizing the function of waste heat recovery.

[0058] It will be apparent to those skilled in the art that this disclosure is not limited to the details of the exemplary embodiments described above, and that this disclosure can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of this disclosure is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this disclosure. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0059] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A waste heat recovery device for blast furnace circulating cooling water, characterized in that, include: Heat exchange box (1); A flow guiding and filtration mechanism (2) is fixedly installed inside the heat exchange box (1). The flow guiding and filtration mechanism (2) includes an assembly sealing plate (201) and multiple sets of filter screens (202). The assembly sealing plate (201) is fixedly connected to the inner wall of the heat exchange box (1). Multiple sets of filter screens (202) are evenly inserted into the assembly sealing plate (201) for filtering impurities from the high-temperature cooling water. A reciprocating heat exchange mechanism (3) is disposed below multiple sets of filter screen cylinders (202). The reciprocating heat exchange mechanism (3) includes an upper heat exchange plate (301), a lower heat exchange plate (302), and multiple sets of flow guiding heat exchange plates (303). The upper heat exchange plate (301) and the lower heat exchange plate (302) are both fixedly disposed inside the heat exchange box (1). The multiple sets of flow guiding heat exchange plates (303) are fixedly disposed between the upper heat exchange plate (301) and the lower heat exchange plate (302). The upper heat exchange plate (301), the lower heat exchange plate (302), and the multiple sets of flow guiding heat exchange plates (303) cooperate to form multiple heat conveying chambers and cold flow guiding chambers. The multiple heat conveying chambers and cold flow guiding chambers are arranged alternately.

2. The waste heat recovery device for blast furnace circulating cooling water according to claim 1, characterized in that, A cover (101) is fixedly installed on the top of the heat exchange box (1), a liquid filling pipe (102) is fixedly connected to the top of the cover (101), and a drain pipe (103) is fixedly connected to the bottom of the heat exchange box (1).

3. The waste heat recovery device for blast furnace circulating cooling water according to claim 2, characterized in that, The assembly sealing plate (201) is sealed to the heat exchange box (1), and the upper side of the assembly sealing plate (201) and the box cover (101) cooperate to form a flow guide cavity, and the liquid adding pipe (102) is connected to the flow guide cavity.

4. The waste heat recovery device for blast furnace circulating cooling water according to claim 1, characterized in that, The flow guiding and filtering mechanism (2) also includes a flow collecting plate (203) and a guide pipe (204). The flow collecting plate (203) is fixedly installed in the heat exchange box (1) and located below multiple sets of filter screen cylinders (202). One end of the guide pipe (204) is connected to the flow collecting plate (203), and the other end of the guide pipe (204) is connected to the heat transfer chamber.

5. The waste heat recovery device for blast furnace circulating cooling water according to claim 1, characterized in that, Limiting grooves are provided on the lower side of the upper heat exchange plate (301), the upper side of the lower heat exchange plate (302), and both sides of the flow guiding heat exchange plate (303), and sealing rings (304) are provided in the limiting grooves.

6. The waste heat recovery device for blast furnace circulating cooling water according to claim 1, characterized in that, Multiple sets of heat exchange plates (303) are connected by multiple heat flow circulation pipes (305). The multiple heat flow circulation pipes (305) are symmetrically arranged on both sides of the heat exchange plates (303), and the two ends of the heat flow circulation pipes (305) are respectively connected to the heat conveying chambers on the upper and lower sides. The high-temperature cooling water flows back and forth in a Z-shape from top to bottom under the guidance of the heat conveying chambers and the multiple heat flow circulation pipes (305).

7. The waste heat recovery device for blast furnace circulating cooling water according to claim 2, characterized in that, A hot drain pipe (306) is fixedly connected to the lower heat exchange plate (302). One end of the hot drain pipe (306) is connected to the heat transfer chamber, and the other end of the hot drain pipe (306) is connected to the drain pipe (103).

8. The waste heat recovery device for blast furnace circulating cooling water according to claim 1, characterized in that, Multiple sets of heat exchange plates (303) are connected by multiple cold flow circulation pipes (307). The multiple cold flow circulation pipes (307) are symmetrically arranged on both sides of the heat exchange plates (303), and both ends of the multiple cold flow circulation pipes (307) are connected to the cold flow cavities on the upper and lower sides.

9. The waste heat recovery device for blast furnace circulating cooling water according to claim 8, characterized in that, A cold liquid filling pipe (308) is provided below the lower heat exchange plate (302), one end of which is connected to the cold flow guiding cavity. A cold liquid draining pipe (309) is provided above the upper heat exchange plate (301), one end of which is connected to the cold flow guiding cavity. The other ends of both the cold liquid filling pipe (308) and the cold liquid draining pipe (309) pass through the heat exchange box (1).

10. The waste heat recovery device for blast furnace circulating cooling water according to claim 9, characterized in that, The cold flow chamber carries heat exchange fluid, which flows back and forth in a Z-shape from bottom to top along the cold liquid filling pipe (308), the cold flow chamber, multiple sets of cold flow circulation pipes (307) and the cold liquid discharge pipe (309).

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