Submerged arc furnace cooling water waste heat recycling device

Abstract

The utility model discloses a submerged arc furnace cooling water waste heat recycling device which comprises a recycling assembly, and the recycling assembly comprises a heat exchange shell, a partition plate, a heat exchange pipe, a driving motor, a threaded rod, a scraping plate, a second water inlet pipe, a second water pump, a liquid storage tank and a liquid inlet pipe. Two partition plates are symmetrically and fixedly connected to the inner side wall of the heat exchange shell, heat exchange pipes are evenly and fixedly connected between the two partition plates, two driving motors are symmetrically installed at the top of the heat exchange shell, and output shafts of the driving motors are fixedly connected with one ends of threaded rods. Cleaning liquid is stored in the liquid storage tank, after the waste heat recovery device works for a period of time, the cleaning liquid is fed into the heat exchange shell through the liquid inlet pipe, the threaded rod is driven by the driving motor to rotate, the scraper blade moves along the heat exchange pipe, scales on the heat exchange pipe are removed, the scales are prevented from hindering heat transfer, and the waste heat recovery efficiency is improved. Meanwhile, the water flow resistance is reduced, and the energy consumption of the waste heat recycling device is reduced.

Description

Technical Field

[0001] The utility model relates to a waste heat recovery device, in particular to a waste heat recovery and utilization device for cooling water of a submerged arc furnace, belonging to the technical field of submerged arc furnaces. Background Art

[0002] Submerged arc furnace is a key equipment used by many mining enterprises to process ore. Its working principle is to use high temperature to melt ore. During the smelting process, the submerged arc furnace will generate a large amount of heat energy, which is partly dissipated through the cooling water system. The submerged arc furnace cooling water waste heat recovery device is designed to capture and recover this part of heat energy.

[0003] In the process of waste heat recovery of cooling water of submerged arc furnace, the heat exchange tube is in contact with water containing various minerals and impurities for a long time. These substances are deposited on the surface of the heat exchange tube and gradually form a scale layer. The existence of the scale layer will hinder the transfer of heat, which greatly reduces the waste heat recovery efficiency. At the same time, the thickening of the scale layer will also increase the water flow resistance, increase the power consumption of the water pump, and further increase the production cost. Therefore, a device for recovering waste heat from cooling water of submerged arc furnace is proposed. Utility Model Content

[0004] The utility model aims to provide a device for recovering waste heat of cooling water of a submerged arc furnace, so as to solve one of the problems raised in the above-mentioned background technology.

[0005] The utility model is implemented by the following technical scheme: a device for recycling waste heat from cooling water of a submerged arc furnace, comprising a recycling assembly, wherein the recycling assembly comprises a heat exchange shell, a partition, a heat exchange tube, a drive motor, a threaded rod, a scraper, a second water inlet pipe, a second water pump, a liquid storage tank and a liquid inlet pipe;

[0006] The inner wall of the heat exchange shell is symmetrically and fixedly connected with two partitions, and a heat exchange tube is evenly and fixedly connected between the two partitions. Two driving motors are symmetrically installed on the top of the heat exchange shell, and the output shaft of the driving motor is fixedly connected to one end of the threaded rod. The outer wall of the threaded rod is threadedly connected with a scraper, and the scraper is slidably connected to the outer wall of the heat exchange tube. The outer wall of the heat exchange shell is connected with a second water inlet pipe, and a second water pump is installed on the second water inlet pipe. The outer wall of the second water inlet pipe is connected with a liquid inlet pipe, and one end of the liquid inlet pipe is connected with a liquid storage tank.

[0007] As a further preferred embodiment of the present technical solution: the top of the heat exchange shell is connected to a first water inlet pipe.

[0008] As a further preferred embodiment of the present technical solution: a first water pump is installed on the first water inlet pipe.

[0009] As a further preferred embodiment of the present technical solution: one end of the first water inlet pipe is connected to a submerged arc furnace body, and a controller is installed on the submerged arc furnace body.

[0010] As a further preferred embodiment of the present technical solution: the bottom of the heat exchange shell is connected to a first drain pipe.

[0011] As a further preferred embodiment of the technical solution: the outer side wall of the heat exchange shell is connected to a second drain pipe, and one end of the second drain pipe is connected to a water tank.

[0012] As a further preferred embodiment of the present technical solution: the outer side wall of the second drain pipe is connected to a sewage pipe.

[0013] As a further preferred embodiment of the present technical solution: electric valves are installed on the first water inlet pipe, the first drain pipe, the second water inlet pipe, the liquid inlet pipe, the second drain pipe and the sewage pipe.

[0014] Advantages of the utility model: The utility model stores cleaning liquid in a liquid storage tank. When the waste heat recovery device has been working for a period of time, the cleaning liquid is sent into the heat exchange shell through the liquid inlet pipe, and the threaded rod is driven by the driving motor to rotate, so that the scraper moves along the heat exchange tube, and the scale on the heat exchange tube is removed to prevent the scale from hindering the heat transfer, thereby improving the waste heat recovery efficiency, reducing the water flow resistance, reducing the energy consumption of the waste heat recovery device, and saving energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the second water inlet pipe of the utility model;

[0018] Figure 3 This is a schematic diagram of the internal structure of the heat exchange shell of the utility model;

[0019] Figure 4 This is a schematic diagram of the second drainage pipe structure of the utility model.

[0020] In the figure: 10, recovery component; 11, heat exchange shell; 12, first water inlet pipe; 13, first water pump; 14, partition; 15, heat exchange tube; 16, first drain pipe; 17, drive motor; 18, threaded rod; 19, scraper; 110, second water inlet pipe; 111, second water pump; 112, liquid storage tank; 113, liquid inlet pipe; 114, second drain pipe; 115, sewage pipe; 20, electric arc furnace body; 30, water tank. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] Example

[0023] See also Figure 1-Figure 4 The utility model provides a technical solution: a device for recycling waste heat from cooling water of a submerged arc furnace, comprising a recycling assembly 10, the recycling assembly 10 comprising a heat exchange shell 11, a partition 14, a heat exchange tube 15, a drive motor 17, a threaded rod 18, a scraper 19, a second water inlet pipe 110, a second water pump 111, a liquid storage tank 112 and a liquid inlet pipe 113;

[0024] The inner wall of the heat exchange shell 11 is symmetrically fixedly connected with two partitions 14, and a heat exchange tube 15 is evenly fixedly connected between the two partitions 14. Two drive motors 17 are symmetrically installed on the top of the heat exchange shell 11. The output shaft of the drive motor 17 is fixedly connected to one end of the threaded rod 18. The outer wall of the threaded rod 18 is threadedly connected with a scraper 19, and the scraper 19 is slidably connected to the outer wall of the heat exchange tube 15. The outer wall of the heat exchange shell 11 is connected with a second water inlet pipe 110, and a second water pump 111 is installed on the second water inlet pipe 110. The outer wall of the second water inlet pipe 110 is connected with a second water pump 111. The side wall is connected with a liquid inlet pipe 113, one end of which is connected with a liquid storage tank 112. The liquid storage tank 112 stores cleaning liquid for cleaning. When the waste heat recovery device has been working for a period of time, the water inlet pipe and the drain pipe are closed, and the liquid inlet pipe 113 and the sewage pipe 115 are opened. Cleaning liquid is fed into the heat exchange shell 11 through the liquid inlet pipe 113, and the threaded rod 18 is driven to rotate by the driving motor 17, so that the scraper 19 moves along the heat exchange tube 15 to remove the scale on the heat exchange tube 15, prevent the scale from hindering the heat transfer, and improve the waste heat recovery efficiency.

[0025] In this embodiment, specifically: the top of the heat exchange shell 11 is connected to a first water inlet pipe 12 , and the first water inlet pipe 12 is connected to the cooling system of the submerged arc furnace body 20 .

[0026] In this embodiment, specifically: a first water pump 13 is installed on the first water inlet pipe 12 , and cooling water is pumped into the heat exchange shell 11 through the first water pump 13 .

[0027] In this embodiment, specifically: one end of the first water inlet pipe 12 is connected to the submerged arc furnace body 20, and a controller is installed on the submerged arc furnace body 20. The controller controls the operation of the submerged arc furnace body 20 and also controls the operation of the waste heat recovery device.

[0028] In this embodiment, specifically: the bottom of the heat exchange shell 11 is connected to a first drain pipe 16 , and the cooling water exchanges heat with external cold water after passing through the heat exchange pipe 15 , and then is discharged through the first drain pipe 16 .

[0029] In this embodiment, specifically: the outer wall of the heat exchange shell 11 is connected to a second drain pipe 114, one end of the second drain pipe 114 is connected to a water tank 30, and the water after heat exchange is stored in the water tank 30 so that the recovered heat can be used in other production links.

[0030] In this embodiment, specifically: the outer wall of the second drainage pipe 114 is connected to a sewage pipe 115 , and after cleaning is completed, sewage is discharged through the sewage pipe 115 .

[0031] In the present embodiment, specifically: electric valves are installed on the first water inlet pipe 12, the first drain pipe 16, the second water inlet pipe 110, the liquid inlet pipe 113, the second drain pipe 114 and the sewage pipe 115. The opening and closing of the first water inlet pipe 12, the first drain pipe 16, the second water inlet pipe 110, the liquid inlet pipe 113, the second drain pipe 114 and the sewage pipe 115 are controlled by the electric valves to meet the needs of heat exchange and cleaning. The adjustment of the electric valves can send operating instructions through the control system on the electric arc furnace body 20.

[0032] Working principle or structural principle: When in use, the first water inlet pipe 12 is connected to the cooling system of the electric arc furnace body 20, and the cooling water is pumped into the heat exchange shell 11 through the first water pump 13. The cooling water exchanges heat with the external cold water after passing through the heat exchange tube 15, and is then discharged through the first drain pipe 16. The cold water enters the heat exchange shell 11 through the second water inlet pipe 110, and enters the water tank 30 for storage through the second drain pipe 114 after heat exchange and temperature rise, thereby completing the recovery of the heat of the cooling water. When the waste heat recovery device has been working for a period of time, the water inlet pipe and the drain pipe are closed, the liquid inlet pipe 113 and the sewage pipe 115 are opened, and the cleaning liquid is sent into the heat exchange shell 11 through the liquid inlet pipe 113, and the threaded rod 18 is driven to rotate by the driving motor 17, so that the scraper 19 moves along the heat exchange tube 15, and the scale on the heat exchange tube 15 is removed to prevent the scale from hindering the heat transfer, thereby improving the waste heat recovery efficiency, reducing the water flow resistance, reducing the energy consumption of the waste heat recovery device, and saving energy.

[0033] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A device for recovering waste heat from cooling water of a submerged arc furnace, comprising a recovery component (10), characterized in that: The recovery assembly (10) comprises a heat exchange shell (11), a partition (14), a heat exchange tube (15), a drive motor (17), a threaded rod (18), a scraper (19), a second water inlet pipe (110), a second water pump (111), a liquid storage tank (112), and a liquid inlet pipe (113); Two partitions (14) are symmetrically fixedly connected to the inner wall of the heat exchange shell (11), and a heat exchange tube (15) is evenly fixedly connected between the two partitions (14). Two drive motors (17) are symmetrically installed on the top of the heat exchange shell (11), and the output shaft of the drive motor (17) is fixedly connected to one end of a threaded rod (18). The outer wall of the threaded rod (18) is threadedly connected to a scraper (19), and the scraper (19) is slidably connected to the outer wall of the heat exchange tube (15). The outer wall of the heat exchange shell (11) is connected to a second water inlet pipe (110), and a second water pump (111) is installed on the second water inlet pipe (110). The outer wall of the second water inlet pipe (110) is connected to a liquid inlet pipe (113), and one end of the liquid inlet pipe (113) is connected to a liquid storage tank (112).

2. The device for recovering waste heat from cooling water of a submerged arc furnace according to claim 1, characterized in that: The top of the heat exchange shell (11) is connected to a first water inlet pipe (12).

3. The device for recovering waste heat from cooling water of a submerged arc furnace according to claim 2, characterized in that: A first water pump (13) is installed on the first water inlet pipe (12).

4. The device for recovering waste heat from cooling water of a submerged arc furnace according to claim 3, characterized in that: One end of the first water inlet pipe (12) is connected to the submerged arc furnace body (20), and a controller is installed on the submerged arc furnace body (20).

5. The device for recovering waste heat from cooling water of a submerged arc furnace according to claim 2, characterized in that: The bottom of the heat exchange shell (11) is connected to a first drain pipe (16).

6. The device for recovering waste heat from cooling water of a submerged arc furnace according to claim 5, characterized in that: The outer wall of the heat exchange shell (11) is connected to a second drain pipe (114), and one end of the second drain pipe (114) is connected to a water tank (30).

7. The device for recovering waste heat from cooling water of a submerged arc furnace according to claim 6, characterized in that: The outer side wall of the second drainage pipe (114) is connected to a sewage pipe (115).

8. The device for recovering waste heat from cooling water of a submerged arc furnace according to claim 7, characterized in that: Electric valves are installed on the first water inlet pipe (12), the first drainage pipe (16), the second water inlet pipe (110), the liquid inlet pipe (113), the second drainage pipe (114) and the sewage pipe (115).

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