Waste heat recovery device for drying type aluminum hydroxide production

Abstract

The utility model discloses a waste heat recovery device for drying type aluminum hydroxide production, which comprises a drying machine, a feed port is arranged on the right side of the drying machine, a discharge port is arranged on the left side of the drying machine, and a smoke outlet pipe is fixedly connected to the upper side of the drying machine. The recovery unit comprises a first concentration pipe, the first concentration pipe is fixedly connected to the upper end of the smoke outlet pipe, and first branch pipes are fixedly connected to the upper sides of the left end and the right end of the first concentration pipe. By arranging the first concentration pipe, the second concentration pipe, the first branch pipe, the second branch pipe, the filter box, the filter plate and the first recovery cylinder, flue gas waste heat in the drying machine can be conveniently recovered, flue gas is filtered through the filter plate, by controlling opening and closing of a valve, when the filter plate is replaced, the waste heat recovery device does not need to be stopped, and the waste heat recovery efficiency is improved. The influence on the production of the drying type aluminum hydroxide is avoided.

Description

Technical Field

[0001] This utility model relates to the field of aluminum hydroxide production, and in particular to a waste heat recovery device for drying-type aluminum hydroxide production. Background Technology

[0002] Dry-processed aluminum hydroxide refers to aluminum hydroxide that has undergone a specific drying process. It is mainly used to remove moisture or water of crystallization to meet the needs of different industrial applications.

[0003] A search revealed a Chinese patent with application number "202320034039.X", which specifically describes a waste heat recovery device for the production of aluminum hydroxide using a drying type. In the process of drying aluminum hydroxide using a dryer, air outlets one and two serve as the air outlet positions. The installation of filters reduces dust and powder emitted from air outlets one and two. By squeezing a block, the filter is slidably inserted into air outlets one and two. A locking block positions the filter during this sliding insertion. A rubber layer ensures a seal between the block and the pipe. The filter design avoids the blockage of the pipe by dust and powder in existing waste heat recovery methods, thus preventing the impact on heat recovery efficiency. The support block and support plate provide support and fixation for the dryer.

[0004] The above-mentioned filter screen filters the exhaust gas from the dryer to prevent dust from clogging the air inlet for waste heat recovery. However, if the filter screen becomes clogged, the entire waste heat recovery device needs to be shut down, the filter screen replaced, and waste heat recovery can be resumed. This can easily affect the drying of aluminum hydroxide and reduce the production speed. Utility Model Content

[0005] In order to overcome the shortcomings of existing technologies that require stopping the waste heat recovery device and reducing production speed when replacing the filter screen at the flue gas outlet, one of the purposes of this utility model is to provide a waste heat recovery device for the production of drying-type aluminum hydroxide.

[0006] One of the objectives of this utility model is achieved by the following technical solution: a waste heat recovery device for the production of drying-type aluminum hydroxide, including a dryer, wherein a feed inlet is provided on the right side of the dryer, a discharge outlet is provided on the left side of the dryer, and a smoke outlet pipe is fixedly connected to the upper side of the dryer, characterized in that: a recovery unit is provided on the upper side of the dryer;

[0007] The recycling unit includes a central pipe, which is fixedly connected to the upper end of the smoke outlet pipe. Branch pipes are fixedly connected to the upper sides of both ends of the central pipe. Filter boxes are fixedly connected to the upper ends of both branch pipes. Valves are installed on the outer sides of both branch pipes. Filter plates are installed on the inner sides of both filter boxes. A drawer plate is fixedly connected to the outer side of each filter plate. Branch pipes are fixedly connected to the upper sides of both filter boxes. Valves are installed on the outer sides of both branch pipes. A central pipe is fixedly connected to the upper end of each branch pipe. A fan is fixedly connected to the right side of the central pipe. An air inlet pipe is fixedly connected to the right side of the fan. A recycling cylinder is fixedly connected to the lower end of the air inlet pipe.

[0008] According to the aforementioned waste heat recovery device for drying aluminum hydroxide production, the filter plate is slidably connected to the filter box.

[0009] According to the aforementioned waste heat recovery device for drying aluminum hydroxide production, a recovery pipe is fixedly connected to the inner side of the first recovery cylinder, an outlet pipe is fixedly connected to the right side of the first recovery cylinder, a second recovery cylinder is fixedly connected to the front side of the first recovery cylinder, a second recovery pipe is fixedly connected to the inner side of the second recovery cylinder, the second recovery pipe is connected to the first recovery pipe, a water outlet pipe is fixedly connected to the left side of the second recovery pipe, an inlet pipe is fixedly connected between the second recovery cylinder and the dryer, and a second fan is fixedly connected to the right side of the second recovery cylinder.

[0010] According to the aforementioned waste heat recovery device for drying aluminum hydroxide production, both the first recovery pipe and the second recovery pipe are arranged in a spiral structure.

[0011] According to the aforementioned waste heat recovery device for drying aluminum hydroxide production, a heat insulation cover is provided on the upper side of the dryer, and the second and first recovery cylinders are both located inside the heat insulation cover.

[0012] According to the aforementioned waste heat recovery device for drying aluminum hydroxide production, the air inlet pipe is configured in an L-shape.

[0013] According to the aforementioned waste heat recovery device for drying aluminum hydroxide production, a water inlet pipe is fixedly connected to the rear side of the recovery pipe.

[0014] Beneficial effects:

[0015] By setting up a central pipe 1, a central pipe 2, a branch pipe 1, a branch pipe 2, a filter box, a filter plate, and a recovery cylinder 1, it is convenient to recover the waste heat of the flue gas in the dryer, and filter the flue gas through the filter plate. By controlling the opening and closing of the valve, it is convenient to replace the filter plate without stopping the waste heat recovery device, thus avoiding affecting the production of dried aluminum hydroxide.

[0016] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0018] Figure 1 This is a three-dimensional structural diagram of a waste heat recovery device for drying aluminum hydroxide production according to this utility model;

[0019] Figure 2 This is a three-dimensional cross-sectional view of the recovery unit in a waste heat recovery device for drying aluminum hydroxide production according to this utility model.

[0020] Figure 3 This is a three-dimensional structural diagram of the recovery unit in a waste heat recovery device for drying aluminum hydroxide production according to this utility model;

[0021] Figure 4 This is a cross-sectional perspective view of recovery cylinder one and recovery cylinder two in a waste heat recovery device for drying aluminum hydroxide production according to this utility model.

[0022] Legend:

[0023] 1. Dryer; 2. Feed inlet; 3. Discharge outlet; 4. Smoke outlet pipe; 5. Recovery unit; 501. Central pipe one; 502. Branch pipe one; 503. Valve one; 504. Filter box; 505. Filter plate; 506. Draw plate; 507. Branch pipe two; 508. Valve two; 509. Central pipe two; 510. Fan one; 511. Air inlet pipe; 512. Recovery cylinder one; 513. Recovery pipe one; 514. Air outlet pipe; 515. Recovery cylinder two; 516. Fan two; 517. Inlet pipe; 518. Water outlet pipe; 519. Recovery pipe two; 6. Insulation cover. Detailed Implementation

[0024] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0025] Reference Figure 1 - Figure 4A waste heat recovery device for drying aluminum hydroxide production includes a dryer 1, a feed inlet 2 on the right side of the dryer 1, a discharge outlet 3 on the left side of the dryer 1, a flue pipe 4 fixedly connected to the upper side of the dryer 1, and a recovery unit 5 on the upper side of the dryer 1. The recovery unit 5 facilitates the recovery and utilization of waste heat from the flue gas discharged from the flue pipe 4.

[0026] The recycling unit 5 includes a central pipe 501, which is fixedly connected to the upper end of the smoke outlet pipe 4. Branch pipes 502 are fixedly connected to the upper sides of both ends of the central pipe 501. Filter boxes 504 are fixedly connected to the upper ends of both branch pipes 502. Valves 503 are installed on the outer sides of both branch pipes 502. Filter plates 505 are installed on the inner sides of both filter boxes 504. A drawer plate 50 is fixedly connected to the outer side of each filter plate 505. 6. Branch pipes 507 are fixedly connected to the upper side of both filter boxes 504. Valves 508 are installed on the outer side of both branch pipes 507. A central pipe 509 is fixedly connected to the upper end of branch pipe 507. A fan 510 is fixedly connected to the right side of central pipe 509. An air inlet pipe 511 is fixedly connected to the right side of fan 510. A recovery cylinder 512 is fixedly connected to the lower end of air inlet pipe 511. Air inlet pipe 511 has an L-shaped structure. Filter plate 50 5 is slidably connected to filter box 504. During recovery, flue gas enters central pipe 501 through flue outlet pipe 4. At this time, open one of the valves 503 and 508 on the left and right sides to allow the flue gas to enter one of the filter boxes 504 and be filtered by filter plate 505. Then, the flue gas enters the inlet pipe 511 through central pipe 509 to facilitate the recovery of waste heat by recovery cylinder 512. When filter plate 505 is blocked, open the other valve 503 and valve 508 to connect the other branch pipe 502 and branch pipe 507, and close one valve 503 and valve 508 to prevent flue gas from entering the blocked path of filter plate 505. Then, pull the pull plate 506 to remove the blocked filter plate 505 and replace it with a new filter plate 505. At the same time, the other filter plate 505 continues to filter the flue gas, so that the flue gas can be filtered without stopping the equipment. The operation is simple.

[0027] A first recovery pipe 513 is fixedly connected to the inner side of the first recovery cylinder 512. An air outlet pipe 514 is fixedly connected to the right side of the first recovery cylinder 512. A second recovery cylinder 515 is fixedly connected to the front side of the first recovery cylinder 512. A second recovery pipe 519 is fixedly connected to the inner side of the second recovery cylinder 515. The second recovery pipe 519 communicates with the first recovery pipe 513. A water outlet pipe 518 is fixedly connected to the left side of the second recovery pipe 519. An inlet pipe 517 is fixedly connected between the second recovery cylinder 515 and the dryer 1. A second fan 516 is fixedly connected to the right side of the second recovery cylinder 515. Both pipe 1 (513) and recovery pipe 2 (519) are spiral structures. A water inlet pipe is fixedly connected to the rear side of recovery pipe 1 (513). During recovery, cold water is first introduced into recovery pipe 1 (513), which then enters recovery pipe 2 (519) and is discharged through water outlet pipe 518. As shown, recovery pipe 1 (513) exchanges heat with the high-temperature flue gas. The water falls into recovery cylinder 2 (515), and fan 2 (516) is started to heat the drawn-in airflow. The hot air is then introduced into dryer 1 through inlet pipe 517 to dry aluminum hydroxide, facilitating the utilization of heat.

[0028] A heat insulation cover 6 is installed on the upper side of the dryer 1. The second recovery cylinder 515 and the first recovery cylinder 512 are both located inside the heat insulation cover 6. The heat insulation cover 6 can conveniently keep the second recovery cylinder 515 and the first recovery cylinder 512 warm, thus avoiding excessive heat loss.

[0029] Working principle: During operation, when the dryer 1 dries aluminum hydroxide, the flue gas is discharged from the exhaust pipe 4 and enters the central pipe 501. At this time, one of the valves, valve 503 and valve 508, is opened, allowing the flue gas to enter the filter box 504 for filtration. Then, it enters the central pipe 509 and passes through the inlet pipe 511 into the recovery cylinder 512. Cold water is introduced into the recovery pipe 513 to exchange heat with the flue gas. The heated water enters the recovery pipe 519, and the fan 516 is started to return the heat to the dryer 1 for reuse. When the filter plate 505 becomes clogged, valves 503 and 508 are opened on the other side, and the above-mentioned valves 503 and 508 are closed, allowing the filter box 504 on the other side to filter the flue gas. The filter plate 505 on the other side is then removed and replaced, allowing the flue gas to be filtered without stopping the equipment.

[0030] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A waste heat recovery device for drying aluminum hydroxide production, comprising a dryer (1), wherein a feed inlet (2) is provided on the right side of the dryer (1), a discharge outlet (3) is provided on the left side of the dryer (1), and a smoke outlet pipe (4) is fixedly connected to the upper side of the dryer (1), characterized in that: A recovery unit (5) is provided on the upper side of the dryer (1); The recycling unit (5) includes a central pipe (501), which is fixedly connected to the upper end of the smoke outlet pipe (4). Branch pipes (502) are fixedly connected to the upper sides of both ends of the central pipe (501). Filter boxes (504) are fixedly connected to the upper ends of both branches (502). Valves (503) are installed on the outer sides of both branches (502). Filter plates (505) are installed on the inner sides of both filter boxes (504). A drawer plate (506) is fixedly connected to the side. A branch pipe (507) is fixedly connected to the upper side of the filter box (504) on both sides. A valve (508) is provided on the outer side of the branch pipe (507) on both sides. A central pipe (509) is fixedly connected to the upper end of the branch pipe (507). A fan (510) is fixedly connected to the right side of the central pipe (509). An air inlet pipe (511) is fixedly connected to the right side of the fan (510). A recovery cylinder (512) is fixedly connected to the lower end of the air inlet pipe (511).

2. The waste heat recovery device for drying-type aluminum hydroxide production according to claim 1, characterized in that, The filter plate (505) is slidably connected to the filter box (504).

3. The waste heat recovery device for drying-type aluminum hydroxide production according to claim 1, characterized in that, A first recycling pipe (513) is fixedly connected to the inner side of the first recycling cylinder (512). An air outlet pipe (514) is fixedly connected to the right side of the first recycling cylinder (512). A second recycling cylinder (515) is fixedly connected to the front side of the first recycling cylinder (512). A second recycling pipe (519) is fixedly connected to the inner side of the second recycling cylinder (515). The second recycling pipe (519) is connected to the first recycling pipe (513). A water outlet pipe (518) is fixedly connected to the left side of the second recycling pipe (519). An inlet pipe (517) is fixedly connected between the second recycling cylinder (515) and the dryer (1). A second fan (516) is fixedly connected to the right side of the second recycling cylinder (515).

4. The waste heat recovery device for drying-type aluminum hydroxide production according to claim 3, characterized in that, Both the first recovery tube (513) and the second recovery tube (519) are spiral-shaped.

5. The waste heat recovery device for drying-type aluminum hydroxide production according to claim 3, characterized in that, The dryer (1) is provided with a heat insulation cover (6) on its upper side, and the second recovery cylinder (515) and the first recovery cylinder (512) are both located inside the heat insulation cover (6).

6. The waste heat recovery device for drying-type aluminum hydroxide production according to claim 1, characterized in that, The air intake pipe (511) is designed with an L-shaped structure.

7. A waste heat recovery device for drying-type aluminum hydroxide production according to claim 3, characterized in that, A water inlet pipe is fixedly connected to the rear side of the recovery pipe (513).

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