Waste heat recovery device for metal surface treatment

Abstract

The utility model discloses a waste heat recovery device for metal surface treatment, which relates to the technical field of waste heat recovery and comprises a recovery box, a flue gas outlet fixedly mounted in the middle of a box body penetrating through the top end of the recovery box, two fans fixedly mounted close to the bottom end in the recovery box, and a heat exchange component mounted in the middle of two sides penetrating through the recovery box. The heat exchange assembly comprises two sealing boxes, waste liquid flange pipes are fixedly installed in the middles of side box bodies penetrating through the two sealing boxes, and an outlet flange pipe is fixedly installed in a top box body penetrating through one sealing box. The heat exchange assembly is matched with the fan, the contact area of high-temperature smoke and the surface of the exchange liquid pipeline is increased, heat exchange is facilitated, waste heat recovery of smoke and waste liquid is completed at the same time through one set of equipment, the equipment cost is saved, meanwhile, heat preservation is conducted on the exchange liquid pipeline through the high-temperature smoke, and the heat exchange efficiency is improved. And the loss of heat of exchange liquid after heat exchange is completed is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of waste heat recovery, in particular to a waste heat recovery device for metal surface treatment. Background Art

[0002] A large amount of waste liquid and waste gas will be generated during the metal surface treatment process, and a large amount of heat is contained in the waste liquid and waste gas. If this heat is not treated and directly discharged, it will not only cause environmental pollution, but also cause heat waste. Therefore, it is necessary to recover this heat during the metal surface treatment process. This scheme specifically relates to a waste heat recovery device for metal surface treatment. When the existing waste heat recovery device for metal surface treatment recovers waste heat, it is necessary to use two sets of heat exchangers to perform heat exchange treatment on the high-temperature waste gas and wastewater respectively to facilitate waste heat recovery, so the required equipment cost is high. Utility Model Content

[0003] The main purpose of the utility model is to provide a waste heat recovery device for metal surface treatment, which can effectively solve the problems in the background technology.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A waste heat recovery device for metal surface treatment comprises a recovery box, a smoke outlet is fixedly installed in the center of the top box body penetrating the recovery box, two fans are fixedly installed at the bottom end inside the recovery box, a heat exchange component is installed in the center of both sides of the recovery box, the heat exchange component comprises two sealing boxes, waste liquid flange pipes are fixedly installed in the center of the side boxes penetrating the two sealing boxes, an outlet flange pipe is fixedly installed in the top box body penetrating one of the sealing boxes, an inlet flange pipe is fixedly installed in the bottom box body penetrating the other sealing box, a partition is fixedly installed in the center of the sealing box, a plurality of waste liquid pipes are fixedly installed between the two partitions, an exchange liquid pipe is arranged outside the waste liquid pipe, and a baffle is fixedly installed between the front and rear end exchange liquid pipes and the box body of the recovery box.

[0006] As a further solution of the utility model, the sealing box and the recovery box are fixedly connected by bolts and nuts, and a sealing ring is installed at the junction of the sealing box and the recovery box.

[0007] As a further solution of the utility model, the two ends of the exchange liquid pipeline are respectively fixedly connected to the two side boxes of the recovery box, and the exchange liquid pipeline runs through the boxes on both sides of the recovery box, and the outlet flange pipe and the exchange liquid pipeline are connected to the cavity formed between the sealing box, the recovery box and the partition.

[0008] As a further solution of the utility model, the waste liquid pipeline is fixedly connected to the two side boxes of the recovery box, and the waste liquid pipeline passes through the partition, and the waste liquid flange pipe and the waste liquid pipeline are both connected to the cavity formed between the sealing box and the partition.

[0009] As a further solution of the utility model, the waste liquid pipes in the upper and lower layers are arranged alternately in a wave shape, and the baffle penetrates through the two boxes of the recovery box and is fixedly connected to the box.

[0010] Compared with the prior art, the utility model has the following beneficial effects:

[0011] The utility model sets a heat exchange component in conjunction with a fan. When the fan is started, negative pressure is formed inside the recovery box to suck high-temperature flue gas formed after metal surface treatment into the recovery box, and at the same time, low-temperature exchange liquid is transported to the exchange liquid pipeline through the inlet flange pipe, and high-temperature waste liquid formed after metal surface treatment is transported to the waste liquid pipeline through the waste liquid flange pipe. When the high-temperature flue gas passes through the outer surfaces of several exchange liquid pipelines, it flows upward in a wave shape, and a baffle is used to prevent the high-temperature flue gas from flowing upward in a straight line along the inner wall of the recovery box, thereby increasing the contact time and contact area between the high-temperature flue gas and the surface of the exchange liquid pipeline. In the process of the flow of high-temperature flue gas, low-temperature exchange liquid and high-temperature waste liquid, the low-temperature exchange liquid exchanges heat with the high-temperature flue gas and waste liquid at the same time to complete waste heat recovery. A set of equipment is used to simultaneously complete the waste heat recovery of flue gas and waste liquid, thereby saving equipment cost. At the same time, the high-temperature flue gas is used to insulate the exchange liquid pipeline, thereby reducing the loss of heat of the exchange liquid after the heat exchange is completed. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the overall structure of a waste heat recovery device for metal surface treatment according to the utility model;

[0013] Figure 2 This is a side view of the internal structure of a recovery box in a waste heat recovery device for metal surface treatment according to the utility model;

[0014] Figure 3 This is a front view of the internal structure of a recovery box in a waste heat recovery device for metal surface treatment according to the utility model;

[0015] Figure 4 This is a structural disassembly diagram of a heat exchange component in a waste heat recovery device for metal surface treatment according to the utility model.

[0016] In the figure: 1. recovery box; 2. flue gas outlet; 3. heat exchange component; 4. fan; 301. sealing box; 302. waste liquid flange pipe; 303. outlet flange pipe; 304. inlet flange pipe; 305. partition; 306. waste liquid pipeline; 307. exchange liquid pipeline; 308. baffle. DETAILED DESCRIPTION

[0017] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0018] like Figure 1-Figure 4 As shown, a waste heat recovery device for metal surface treatment comprises a recovery box 1, a smoke outlet 2 is fixedly installed in the center of the top box body of the recovery box 1, two fans 4 are fixedly installed inside the recovery box 1 near the bottom, a heat exchange component 3 is installed in the center of both sides of the recovery box 1, the heat exchange component 3 comprises two sealing boxes 301, waste liquid flange pipes 302 are fixedly installed in the center of the side boxes of the two sealing boxes 301, an outlet flange pipe 303 is fixedly installed in the top box body of one of the sealing boxes 301, an inlet flange pipe 304 is fixedly installed in the bottom box body of the other sealing box 301, a partition 305 is fixedly installed in the center of the sealing box 301, a plurality of waste liquid pipes 306 are fixedly installed between the two partitions 305, an exchange liquid pipe 307 is arranged outside the waste liquid pipe 306, and a baffle 308 is fixedly installed between the exchange liquid pipe 307 at the front and rear ends and the box body of the recovery box 1.

[0019] The sealing box 301 is fixedly connected to the recovery box 1 by bolts and nuts, and a sealing ring is installed at the junction of the sealing box 301 and the recovery box 1 to facilitate the installation and disassembly of the sealing box 301. At the same time, the sealing ring is used to improve the sealing between the sealing box 301 and the recovery box 1 to avoid leakage of the liquid used as the exchange fluid.

[0020] The two ends of the exchange liquid pipeline 307 are fixedly connected to the two side boxes of the recovery box 1, and the exchange liquid pipeline 307 runs through the boxes on both sides of the recovery box 1. The outlet flange pipe 303 and the exchange liquid pipeline 307 are both connected to the cavity formed between the sealing box 301, the recovery box 1 and the partition 305. The low-temperature exchange liquid enters the exchange liquid pipeline 307 through the inlet flange pipe 304 and the cavity. After the heat exchange is completed, the high-temperature exchange liquid flows out through the outlet flange pipe 303.

[0021] The waste liquid pipe 306 is fixedly connected to the two side boxes of the recovery box 1, and the waste liquid pipe 306 passes through the partition 305. The waste liquid flange pipe 302 and the waste liquid pipe 306 are both connected to the cavity formed between the sealing box 301 and the partition 305. The high-temperature waste liquid enters the waste liquid pipe 306 through one of the waste liquid flange pipes 302 and the cavity. After the heat exchange is completed, the low-temperature waste liquid flows out through the other waste liquid flange pipe 302.

[0022] The upper and lower waste liquid pipes 306 are arranged alternately in a wave shape, and the baffle 308 penetrates the two boxes of the recovery box 1 and is fixedly connected to the box. After the fan 4 is started, the high-temperature flue gas generated during the metal surface treatment enters the recovery box 1, and when passing through the outer surfaces of several exchange liquid pipes 307, it flows upward in a wave shape, increasing the contact time and contact area between the high-temperature flue gas and the surface of the exchange liquid pipe 307, which is beneficial to heat exchange.

[0023] It should be noted that the utility model is a waste heat recovery device for metal surface treatment. When in use, firstly, the waste liquid delivery pipeline after metal surface treatment is connected to the waste liquid flange pipe 302 near the side of the inlet flange pipe 304, the delivery pipeline of the low-temperature exchange liquid is connected to the inlet flange pipe 304, and the flue gas delivery pipeline after metal surface treatment is connected to the bottom of the recovery box 1, wherein the low-temperature exchange liquid is used as the medium for waste heat recovery, and the waste heat is recovered by using the principle of heat exchange;

[0024] When the waste heat recovery device for metal surface treatment is in operation, the fan 4 is started, and negative pressure is formed inside the recovery box 1. The high-temperature flue gas formed during the metal surface treatment process is sucked into the recovery box 1, and when passing through the outer surfaces of the plurality of exchange liquid pipes 307, it flows upward in a wave shape, increasing the contact time and contact area between the high-temperature flue gas and the surface of the exchange liquid pipe 307, while the high-temperature waste liquid formed during the metal surface treatment enters the waste liquid pipe 306 through one of the waste liquid flange pipes 302 and the cavity, and the partition 305 is used to prevent the low-temperature exchange liquid from contacting the waste liquid, and the baffle 308 is used to prevent the high-temperature flue gas from flowing upward in a straight line along the inner wall of the recovery box 1;

[0025] The low-temperature exchange liquid serving as a heat exchange medium enters the exchange liquid pipeline 307 through the inlet flange pipe 304 and the cavity. When the low-temperature exchange liquid flows in the exchange liquid pipeline 307, heat exchange occurs with the high-temperature flue gas and high-temperature wastewater to complete waste heat recovery. At the same time, the high-temperature flue gas is outside the exchange liquid pipeline 304 as an insulation medium, which reduces the heat loss of the exchange liquid after the heat exchange is completed. After that, the high-temperature exchange liquid flows out through the outlet flange pipe 303, the low-temperature flue gas is discharged through the flue gas outlet 2, and the low-temperature wastewater is discharged through the waste liquid flange pipe 302 close to the side of the outlet flange pipe 303.

[0026] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A waste heat recovery device for metal surface treatment, characterized in that: The invention comprises a recovery box (1), a smoke outlet (2) is fixedly installed in the center of the top box body of the recovery box (1), two fans (4) are fixedly installed inside the recovery box (1) near the bottom, a heat exchange component (3) is installed in the center of both sides of the recovery box (1), and the heat exchange component (3) comprises two sealing boxes (301), waste liquid flange pipes (302) are fixedly installed in the center of the side boxes of the two sealing boxes (301), and a waste liquid flange pipe (302) is fixedly installed in the top box body of one of the sealing boxes (301). An outlet flange pipe (303) passes through the bottom box body of another sealing box (301) and is fixedly installed with an inlet flange pipe (304); a partition plate (305) is fixedly installed in the center of the sealing box (301); a plurality of waste liquid pipes (306) are fixedly installed between the two partition plates (305); an exchange liquid pipe (307) is arranged outside the waste liquid pipe (306); a baffle plate (308) is fixedly installed between the front and rear exchange liquid pipes (307) and the box body of the recovery box (1).

2. The waste heat recovery device for metal surface treatment according to claim 1, characterized in that: The sealing box (301) and the recovery box (1) are fixedly connected by bolts and nuts, and a sealing ring is installed at the junction of the sealing box (301) and the recovery box (1).

3. The waste heat recovery device for metal surface treatment according to claim 1, characterized in that: The two ends of the exchange liquid pipeline (307) are respectively fixedly connected to the two side boxes of the recovery box (1), and the exchange liquid pipeline (307) runs through the boxes on both sides of the recovery box (1). The outlet flange pipe (303) and the exchange liquid pipeline (307) are both connected to the cavity formed between the sealing box (301), the recovery box (1) and the partition (305).

4. The waste heat recovery device for metal surface treatment according to claim 1, characterized in that: The waste liquid pipeline (306) is fixedly connected to the two side boxes of the recovery box (1), and the waste liquid pipeline (306) passes through the partition (305), and the waste liquid flange pipe (302) and the waste liquid pipeline (306) are both connected to the cavity formed between the sealing box (301) and the partition (305).

5. The waste heat recovery device for metal surface treatment according to claim 1, characterized in that: The waste liquid pipes (306) in the upper and lower layers are arranged alternately in a wave shape, and the baffle (308) passes through the two boxes of the recovery box (1) and is fixedly connected to the box.

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