A heat exchanger for recovering waste heat of cooling water in hot-dip galvanizing of steel pipes

Abstract

The utility model relates to the technical field of waste heat recovery, and disclose a kind of heat exchanger for steel pipe hot galvanizing cooling water waste heat recovery, and the heat exchange subassembly is composed of inlet pipe, outlet pipe, first liquid trap, first fixed plate, first liquid inlet pipe, second liquid trap, second fixed plate, second liquid inlet pipe, heat exchange tube, the inlet pipe is fixedly installed in the side of heat exchange box, and the outlet pipe is fixedly installed in the side of heat exchange box.The heat exchanger for steel pipe hot galvanizing cooling water waste heat recovery by hot cooling water is added to the inside of heat exchange box through inlet pipe, and then the cooling water after heat exchange can be discharged and reintroduced into the cooling system of steel pipe hot galvanizing, the liquid to be heat exchanged is added to the first liquid inlet pipe, and the liquid to be heat exchanged is guided out from the second liquid inlet pipe after first liquid trap, heat exchange tube, second liquid trap, the heat of hot cooling water can be transferred to the liquid to be heat exchanged, and the reuse of heat and water resources is completed.

Description

Technical Field

[0001] This utility model relates to the field of waste heat recovery technology, specifically a heat exchanger for waste heat recovery from cooling water in hot-dip galvanized steel pipes. Background Technology

[0002] During the hot-dip galvanizing process of steel pipes, the steel pipes need to be cooled after galvanizing. Cooling water is usually used for cooling, and the water temperature after cooling is high, containing a large amount of residual heat.

[0003] However, the current industry practices for handling such high-temperature cooling water have significant flaws. Most companies discharge it directly into sewers, resulting in a large loss of heat energy. While some companies perform simple filtration and recirculation of the cooling water, they do not utilize the residual heat. Directly introducing high-temperature cooling water into the circulation system causes cooling equipment to operate under high load for extended periods, increasing energy consumption and reducing cooling efficiency due to excessively high water temperature. This leads to poor cooling of subsequent steel pipes, affecting product quality. Furthermore, directly discharging high-temperature cooling water causes thermal pollution to the surrounding environment and disrupts the aquatic ecosystem. Recirculation requires continuous replenishment of fresh water to maintain cooling effectiveness, increasing water consumption and production costs, which cannot meet current demands. Utility Model Content

[0004] The purpose of this invention is to provide a heat exchanger for recovering waste heat from cooling water in hot-dip galvanizing of steel pipes, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a heat exchanger for waste heat recovery from hot-dip galvanizing cooling water of steel pipes, comprising a heat exchange box, a heat exchange component, and a connecting component, wherein the heat exchange component is disposed inside the heat exchange box, and the connecting component is disposed on the side of the heat exchange box.

[0006] The heat exchange assembly consists of an inlet pipe, an outlet pipe, a first liquid collection hopper, a first fixing plate, a first liquid inlet pipe, a second liquid collection hopper, a second fixing plate, a second liquid inlet pipe, and a heat exchange tube. The inlet pipe is fixedly installed on the side of the heat exchange box, the outlet pipe is fixedly installed on the side of the heat exchange box, the first liquid collection hopper is fixedly installed inside the heat exchange box, the first fixing plate is fixedly installed inside the first liquid collection hopper, the first liquid inlet pipe is fixedly installed on the side of the first liquid collection hopper, the second liquid collection hopper is fixedly installed inside the heat exchange box, the second fixing plate is fixedly installed inside the second liquid collection hopper, the second liquid inlet pipe is fixedly installed on the side of the second liquid collection hopper, and the heat exchange tube is fixedly installed between the first fixing plate and the second fixing plate.

[0007] Preferably, the connecting assembly consists of a rotating shaft, a door body, a fixed cylinder, a slider, a limiting rod, a sliding rod, a spring, and a fixing block. The rotating shaft is rotatably installed inside the heat exchange box, the door body is fixedly installed outside the rotating shaft, the fixed cylinder is fixedly installed on the side of the heat exchange box, the slider is slidably installed inside the fixed cylinder, the limiting rod is fixedly installed at one end of the slider, the sliding rod is fixedly installed at the other end of the slider, the spring is sleeved on the surface of the sliding rod, and the fixing block is fixedly installed at the bottom of the door body.

[0008] Preferably, the heat exchange tubes are arranged in a circumferential array between the first fixed plate and the second fixed plate. This arrangement can increase the contact area between the liquid to be heat exchanged and the hot cooling water, thus enabling better heat exchange.

[0009] Preferably, a handle is fixedly installed on the top of the door, which can drive the door to rotate around the central axis of the pivot.

[0010] Preferably, a pull ring is fixedly installed on the side of the slide rod, and the slide rod can be moved by the pull ring.

[0011] Preferably, one end of the spring abuts against the fixed cylinder, and the other end of the spring abuts against the slider, and the spring is provided for resetting the slider.

[0012] Preferably, the fixing block has a limiting groove inside that matches the limiting rod, so that the limiting rod can enter the interior of the fixing block and fix the door to the top of the heat exchange box.

[0013] Compared with the prior art, the beneficial effects of this utility model are: This heat exchanger for recovering waste heat from the cooling water during hot-dip galvanizing of steel pipes adds hot cooling water into the heat exchange tank through an inlet pipe, and then discharges the cooled water after heat exchange through an outlet pipe and reintroduces it into the cooling system for hot-dip galvanizing of steel pipes. The liquid to be exchanged is added to the first inlet pipe, and after passing through the first collection hopper, heat exchange pipe, and second collection hopper, it is discharged from the second inlet pipe. This process transfers heat from the hot cooling water to the liquid to be exchanged, thus achieving the reuse of heat and water resources.

[0014] The heat exchanger for waste heat recovery of hot-dip galvanized steel pipe cooling water uses a pull ring to move a sliding rod, which can cause the slider to move the limit rod away from the limit groove. The spring is compressed, and the door can be opened by rotating the handle around the central axis of the rotating shaft. This allows the scale on the surface of the heat exchange tube to be cleaned, preventing the scale from affecting the heat exchange effect. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the internal structure of this utility model; Figure 3 This is a schematic diagram of the structure of the second liquid collection hopper, the second liquid inlet pipe, and the heat exchange pipe of this utility model; Figure 4 This is a schematic diagram of the structure of the first liquid collection hopper, the first fixing plate, and the first liquid inlet pipe of this utility model; Figure 5 This is a schematic diagram of the slide bar, spring, and fixing block of this utility model.

[0016] In the diagram: 1. Heat exchange box; 2. Heat exchange assembly; 201. Inlet pipe; 202. Outlet pipe; 203. First liquid collection hopper; 204. First fixing plate; 205. First liquid inlet pipe; 206. Second liquid collection hopper; 207. Second fixing plate; 208. Second liquid inlet pipe; 209. Heat exchange tube; 3. Connecting assembly; 301. Rotating shaft; 302. Door body; 303. Fixing cylinder; 304. Sliding block; 305. Limiting rod; 306. Sliding rod; 307. Spring; 308. Fixing block. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Please see Figure 1-5 This utility model provides a technical solution: a heat exchanger for waste heat recovery of cooling water in hot-dip galvanized steel pipes, including a heat exchange box 1, a heat exchange component 2, and a connecting component 3. The heat exchange component 2 is disposed inside the heat exchange box 1, and the connecting component 3 is disposed on the side of the heat exchange box 1.

[0019] The heat exchange assembly 2 consists of an inlet pipe 201, an outlet pipe 202, a first liquid collection hopper 203, a first fixing plate 204, a first liquid inlet pipe 205, a second liquid collection hopper 206, a second fixing plate 207, a second liquid inlet pipe 208, and a heat exchange tube 209. The inlet pipe 201 is fixedly installed on the side of the heat exchange box 1, the outlet pipe 202 is fixedly installed on the side of the heat exchange box 1, the first liquid collection hopper 203 is fixedly installed inside the heat exchange box 1, the first fixing plate 207 is fixedly installed inside the first liquid collection hopper 203, and the first liquid inlet pipe 209 is fixedly installed inside the first liquid collection hopper 206. The side of the liquid collection hopper 203, the second liquid collection hopper 206 is fixedly installed inside the heat exchange box 1, the second fixing plate 207 is fixedly installed inside the second liquid collection hopper 206, the second liquid inlet pipe 208 is fixedly installed on the side of the second liquid collection hopper 206, and the heat exchange tube 209 is fixedly installed between the first fixing plate 204 and the second fixing plate 207. The heat exchange tube 209 is arranged in a circumferential array between the first fixing plate 204 and the second fixing plate 207. This arrangement can increase the contact area between the liquid to be heat exchanged and the hot cooling water, and can better perform heat exchange.

[0020] The connecting assembly 3 consists of a rotating shaft 301, a door body 302, a fixed cylinder 303, a slider 304, a limiting rod 305, a sliding rod 306, a spring 307, and a fixing block 308. The rotating shaft 301 is rotatably mounted inside the heat exchange box 1, and the door body 302 is fixedly mounted outside the rotating shaft 301. A handle is fixedly mounted on the top of the door body 302, which can drive the door body 302 to rotate around the central axis of the rotating shaft 301. The fixed cylinder 303 is fixedly mounted on the side of the heat exchange box 1, the slider 304 is slidably mounted inside the fixed cylinder 303, the limiting rod 305 is fixedly mounted on one end of the slider 304, and the sliding rod 306... A pull ring is fixedly installed on the side of the slide rod 306, which can drive the slide rod 306 to move. A spring 307 is sleeved on the surface of the slide rod 306. One end of the spring 307 abuts against the fixed cylinder 303, and the other end of the spring 307 abuts against the slide rod 304. The spring 307 is provided to reset the slide rod 304. The fixing block 308 is fixedly installed at the bottom of the door body 302. The fixing block 308 has a limiting groove inside that matches the limiting rod 305, so that the limiting rod 305 can enter the interior of the fixing block 308, which can fix the door body 302 to the top of the heat exchange box 1.

[0021] In use, hot cooling water is added to the inside of the heat exchange box 1 through the inlet pipe 201, and then the cooled water after heat exchange is discharged through the outlet pipe 202 and reintroduced into the cooling system for hot-dip galvanizing of steel pipes. The liquid to be heat exchanged is added to the first inlet pipe 205. The liquid to be heat exchanged passes through the first liquid collection hopper 203, the heat exchange tube 209, and the second liquid collection hopper 206 and is then discharged from the second inlet pipe 208. This transfers heat from the hot cooling water to the liquid to be heat exchanged, thus reusing energy. The pull ring drives the slide bar 306 to move, which causes the slider 304 to drive the limit rod 305 to disengage from the limit groove. The spring 307 is compressed. The handle drives the door 302 to rotate around the central axis of the rotating shaft 301, which opens the door 302 and allows the scale on the surface of the heat exchange tube 209 to be cleaned, preventing the scale from affecting the heat exchange effect.

Claims

1. A heat exchanger for waste heat recovery from cooling water in hot-dip galvanizing of steel pipes, comprising a heat exchange box (1), a heat exchange assembly (2), and a connecting assembly (3), characterized in that: The heat exchange component (2) is disposed inside the heat exchange box (1), and the connecting component (3) is disposed on the side of the heat exchange box (1); The heat exchange assembly (2) consists of an inlet pipe (201), an outlet pipe (202), a first liquid collection hopper (203), a first fixing plate (204), a first liquid inlet pipe (205), a second liquid collection hopper (206), a second fixing plate (207), a second liquid inlet pipe (208), and a heat exchange tube (209). The inlet pipe (201) is fixedly installed on the side of the heat exchange box (1), the outlet pipe (202) is fixedly installed on the side of the heat exchange box (1), and the first liquid collection hopper (206) is fixedly installed inside the heat exchange box (1). A fixing plate (204) is fixedly installed inside the first liquid collection hopper (203), the first liquid inlet pipe (205) is fixedly installed on the side of the first liquid collection hopper (203), the second liquid collection hopper (206) is fixedly installed inside the heat exchange box (1), the second fixing plate (207) is fixedly installed inside the second liquid collection hopper (206), the second liquid inlet pipe (208) is fixedly installed on the side of the second liquid collection hopper (206), and the heat exchange tube (209) is fixedly installed between the first fixing plate (204) and the second fixing plate (207).

2. A heat exchanger for waste heat recovery from hot-dip galvanizing cooling water of steel pipes according to claim 1, characterized in that: The connecting assembly (3) consists of a rotating shaft (301), a door body (302), a fixed cylinder (303), a slider (304), a limiting rod (305), a sliding rod (306), a spring (307), and a fixing block (308). The rotating shaft (301) is rotatably installed inside the heat exchange box (1). The door body (302) is fixedly installed outside the rotating shaft (301). The fixed cylinder (303) is fixedly installed on the side of the heat exchange box (1). The slider (304) is slidably installed inside the fixed cylinder (303). The limiting rod (305) is fixedly installed at one end of the slider (304). The sliding rod (306) is fixedly installed at the other end of the slider (304). The spring (307) is sleeved on the surface of the sliding rod (306). The fixing block (308) is fixedly installed at the bottom of the door body (302).

3. A heat exchanger for waste heat recovery from hot-dip galvanizing cooling water of steel pipes according to claim 1, characterized in that: The heat exchange tubes (209) are arranged in a circular array between the first fixed plate (204) and the second fixed plate (207).

4. A heat exchanger for waste heat recovery from hot-dip galvanizing cooling water of steel pipes according to claim 2, characterized in that: A handle is fixedly installed on the top of the door (302).

5. A heat exchanger for waste heat recovery from hot-dip galvanizing cooling water of steel pipes according to claim 2, characterized in that: A pull ring is fixedly installed on the side of the slide bar (306).

6. A heat exchanger for waste heat recovery from hot-dip galvanizing cooling water of steel pipes according to claim 2, characterized in that: One end of the spring (307) abuts against the fixed cylinder (303), and the other end of the spring (307) abuts against the slider (304).

7. A heat exchanger for waste heat recovery from hot-dip galvanizing cooling water of steel pipes according to claim 2, characterized in that: The fixed block (308) has a limiting groove inside that matches the limiting rod (305).

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