Industrial silicon furnace waste heat utilization device

Abstract

The utility model relates to the technical field of industrial silicon furnace waste heat treatment, and discloses an industrial silicon furnace waste heat utilization device which comprises a waste heat recovery groove body, an empty groove is formed in the middle of the waste heat recovery groove body, a water storage box body is embedded in the empty groove, a pipe groove is formed in the inner wall of the waste heat recovery groove body, and a heat transfer water pipe is installed in the pipe groove. The heat transfer water pipe is attached to the water storage tank body, and a beating mechanism is arranged between the first filter screen and the second filter screen. According to the waste heat recovery device for the silicon furnace, the empty groove and the pipe groove are formed in the waste heat recovery groove body, the water storage tank body is arranged in the empty groove, and the heat transfer water pipe is arranged in the pipe groove, so that clean water in the water storage tank body is conveniently heated, and waste water heat in the silicon furnace is prevented from being lost; the flue gas in the silicon furnace can be purified, and the first filter screen and the second filter screen can be beaten through the arrangement of the beating mechanism, so that the first filter screen and the second filter screen are prevented from being blocked.

Description

Technical Field

[0001] The utility model relates to the technical field of the waste heat treatment of industrial silicon furnaces, and discloses a waste heat utilization device for industrial silicon furnaces. Background Art

[0002] Industrial silicon is smelted in an industrial silicon furnace, which is a slag-free submerged arc high-temperature smelting process. The raw materials are silica, petroleum coke, wood blocks, low-ash coal, etc. as reducing agents. Through high-temperature smelting, silicon is gradually reduced from silica. During the production process of crude silicon, silica needs to be crushed to a specified particle size and uniformly mixed with carbon reducing agents (charcoal, oil coke, and bituminous coal) in proportion. With the enlargement of silicon furnaces, the waste heat flue gas power generation technology of silicon furnaces has gradually entered engineering applications. In the existing waste heat flue gas power generation of silicon furnaces, a steam turbine generator set is driven by high-temperature flue gas to generate electricity, and a bag filter and the like are arranged at the rear end of the waste heat recovery device of the silicon furnace to filter and purify the flue gas so that the flue gas meets the emission standards. In this process, a large amount of particulate matter in the flue gas generated during the smelting process of the industrial silicon furnace needs to pass through the waste heat recovery device of the silicon furnace and contact the steam turbine generator set. The particulate matter is easily attached and accumulated on the surface of the steam turbine blades, affecting the performance of the steam turbine blades, and requires regular maintenance and replacement, increasing the production cost and reducing the production efficiency.

[0003] Most of the existing solutions are to set up a filter screen in the waste heat recovery device of the silicon furnace to filter the dust in the flue gas. However, too much dust easily causes the blockage of the filter screen, thereby affecting the filtering effect of the filter screen and resulting in poor filtering in the later stage, which has limitations. Moreover, the traditional waste heat recovery device of the silicon furnace only recovers the waste heat of the tail gas of the silicon furnace, and the waste heat of the waste water in the silicon furnace cannot be effectively recovered, resulting in a waste of resources. Summary of the Utility Model

[0004] A waste heat utilization device for an industrial silicon furnace provided by the utility model can effectively recover the waste heat of the flue gas and waste water in the silicon furnace, and at the same time prevent the dust in the flue gas from blocking the filter screen, with high practicability.

[0005] In order to solve the above technical problems, the utility model proposes the following technical solutions:

[0006] A waste heat utilization device for an industrial silicon furnace includes a waste heat recovery tank body. An empty tank is opened in the middle of the waste heat recovery tank body, and a water storage tank body is embedded in the empty tank. Pipe grooves are opened on the inner wall of the waste heat recovery tank body, and heat transfer water pipes are installed in the pipe grooves. The heat transfer water pipes are arranged in a fitting manner with the water storage tank body; exhaust pipe openings and air inlet pipe openings are respectively arranged at the bottom ends of both sides of the waste heat recovery tank body. A first filter screen and a second filter screen are installed at the inner bottom end of the waste heat recovery tank body, and a knocking mechanism is arranged between the first filter screen and the second filter screen.

[0007] Further, a water inlet and a water outlet are respectively arranged on the water storage tank body, and valves are installed on both the water inlet and the water outlet.

[0008] Further, water inlet ports and drain pipe ports are respectively arranged at the top ends of both sides of the waste heat recovery tank body. The water inlet ports and the drain pipe ports are respectively connected to both ends of the heat transfer water pipe, the water inlet ports are connected to the drain outlet of the silicon furnace, and the drain pipe ports are connected to the drain pool.

[0009] Further, four dust collection boxes are penetrated and clamped at the bottom of the waste heat recovery tank body, and the four dust collection boxes are respectively arranged below both sides of the first filter screen and the second filter screen.

[0010] Further, the knocking mechanism includes a rotating motor, a connecting rod, a spring and a knocking ball. The rotating motor is installed at the bottom of the waste heat recovery tank body, the connecting rod is arranged at the output end of the rotating motor, the spring is installed at the end of the connecting rod, and the knocking ball is connected to the connecting rod through the spring.

[0011] Further, both the pipe groove and the heat transfer water pipe are arranged in a zigzag shape, and a flange for contacting with the steam turbine generator set is arranged at the end of the exhaust pipe port.

[0012] As can be seen from the above technical solutions, the beneficial effects of the present utility model are as follows:

[0013] By opening an empty groove and a pipe groove in the waste heat recovery tank body, arranging a water storage tank body in the empty groove, and arranging a heat transfer water pipe in the pipe groove, the present utility model facilitates the heating of the clear water in the water storage tank body, prevents the heat loss of the waste water in the silicon furnace, and can purify the flue gas in the silicon furnace by arranging the first filter screen and the second filter screen in the waste heat recovery tank body, preventing the flue gas from directly entering the steam turbine generator set and causing damage to the steam turbine generator set. At the same time, since the flue gas is arranged in the waste heat recovery tank body, the waste heat of the flue gas can be further utilized to heat the clear water in the water storage tank body. Through the arrangement of the knocking mechanism, the first filter screen and the second filter screen can be knocked to prevent blockage of the first filter screen and the second filter screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0015] Figure 1 is the overall schematic diagram of the present utility model;

[0016] Figure 2 is the schematic diagram of the waste heat recovery tank body in the present utility model;

[0017] Figure 3 This is a schematic cross-sectional connection diagram of the waste heat recovery tank body in the present utility model.

[0018] Reference numerals:

[0019] 1 - Waste heat recovery tank body, 101 - Empty tank, 102 - Pipe groove, 2 - Water storage tank body, 201 - Water inlet, 202 - Water outlet, 3 - Drain pipe port, 4 - Exhaust pipe port, 401 - Flange, 5 - Water inlet pipe port, 6 - Air inlet pipe port, 7 - First filter screen, 8 - Second filter screen, 9 - Dust collection box, 10 - Rotating motor, 11 - Connecting rod, 12 - Spring, 13 - Knocking ball, 14 - Heat transfer water pipe. Specific implementation manners

[0020] Hereinafter, embodiments of the technical solution of the present utility model will be described in detail with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present utility model, and therefore are only examples and cannot be used to limit the protection scope of the present utility model.

[0021] Referring to Figures 1-3 As shown, an industrial silicon furnace waste heat utilization device includes a waste heat recovery tank body 1. An empty tank 101 is provided in the middle of the waste heat recovery tank body 1. A water storage tank body 2 is embedded in the empty tank 101. A pipe groove 102 is provided on the inner wall of the waste heat recovery tank body 1. A heat transfer water pipe 14 is installed in the pipe groove 102, and the heat transfer water pipe 14 is arranged in contact with the water storage tank body 2. At both ends of the side surface of the waste heat recovery tank body 1, an exhaust pipe port 4 and an air inlet pipe port 6 are respectively provided. A first filter screen 7 and a second filter screen 8 are installed at the inner bottom end of the waste heat recovery tank body 1. A knocking mechanism is arranged between the first filter screen 7 and the second filter screen 8.

[0022] In actual use, by providing an empty tank 101 and a pipe groove 102 in the waste heat recovery tank body 1, arranging a water storage tank body 2 in the empty tank 101, and arranging a heat transfer water pipe 14 in the pipe groove 102, it is convenient to heat the clear water in the water storage tank body 2 and prevent the heat loss of the waste water in the silicon furnace. By providing a first filter screen 7 and a second filter screen 8 in the waste heat recovery tank body 1, the flue gas in the silicon furnace can be purified to prevent the flue gas from directly entering the steam turbine generator set and causing damage to the steam turbine generator set. At the same time, since the flue gas is arranged in the waste heat recovery tank body 1, the waste heat of the flue gas can be further utilized to heat the clear water in the water storage tank body 2. By providing the knocking mechanism, the first filter screen 7 and the second filter screen 8 can be knocked to prevent the blockage of the first filter screen 7 and the second filter screen 8.

[0023] In this embodiment, a water inlet 201 and a water outlet 202 are respectively arranged on the water storage tank body 2, and valves are installed on both the water inlet 201 and the water outlet 202. Specifically, water injection and pumping operations can be carried out on the water storage tank body 2 through the water inlet 201 and the water outlet 202, so as to facilitate the heating of the water in the water storage tank body 2, prevent the waste of the heat of the silicon furnace, and have high practicability.

[0024] In this embodiment, water inlet ports 5 and drain ports 3 are respectively provided at the top ends of both sides of the waste heat recovery tank body 1. The water inlet ports 5 and the drain ports 3 are respectively connected to both ends of the heat transfer water pipe 14. The water inlet port 5 is connected to the drain port of the silicon furnace, and the drain port 3 is connected to the drain pool. Specifically, the waste water drain port of the silicon furnace can be conveniently connected through the water inlet port 5 and the drain port 3, so as to effectively utilize the waste heat of the waste water in the silicon furnace, and have high practicability.

[0025] In this embodiment, four dust collection boxes 9 are penetrated and clamped at the bottom of the waste heat recovery tank body 1, and the four dust collection boxes 9 are respectively arranged below both sides of the first filter screen 7 and the second filter screen 8. Specifically, by setting the dust collection boxes 9, the dust particles filtered out by the first filter screen 7 and the second filter screen 8 can be collected. By respectively arranging the dust collection boxes 9 at the bottom ends of both sides of the first filter screen 7 and the second filter screen 8, the dust particles accumulated on the first filter screen 7 and the second filter screen 8 can be effectively collected.

[0026] Among them, the four dust collection boxes 9 are all clamped at the bottom of the waste heat recovery tank body 1, and the dust collection boxes 9 can be disassembled regularly to process the dust.

[0027] In this embodiment, the knocking mechanism includes a rotating motor 10, a connecting rod 11, a spring 12 and a knocking ball 13. The rotating motor 10 is installed at the bottom of the waste heat recovery tank body 1. The connecting rod 11 is arranged at the output end of the rotating motor 10. The spring 12 is installed at the end of the connecting rod 11. The knocking ball 13 is connected to the connecting rod 11 through the spring 12. Specifically, by starting the rotating motor 10, the connecting rod 11 can be driven to rotate, so as to drive the spring 12 and the knocking ball 13 to rotate, and knock on the first filter screen 7 and the second filter screen 8 to prevent the blockage of the first filter screen 7 and the second filter screen 8. Among them, the output end of the rotating motor 10 penetrates the bottom of the waste heat recovery tank body 1 and is sealed. The sealing treatment can be carried out by setting a sealing bearing, and the rotating motor 10 is a heat-resistant motor.

[0028] In this embodiment, both the pipe groove 102 and the heat transfer water pipe 14 are arranged in a zigzag shape. A flange 401 for contacting the steam turbine generator set is provided at the end of the exhaust pipe port 4. By arranging both the pipe groove 102 and the heat transfer water pipe 14 in a zigzag shape, the silicon furnace wastewater in the heat transfer water pipe 14 can effectively wind around the side and bottom of the water storage tank body 2, so as to effectively heat the clear water in the water storage tank body 2. Through the setting of the flange 401, it is convenient to introduce the filtered silicon furnace flue gas into the steam turbine generator set for subsequent power generation work.

[0029] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered by the scope of the claims and the description of the present invention.

Claims

1. An industrial silicon furnace waste heat utilization device, comprising a waste heat recovery tank (1), characterized in that: The waste heat recovery tank body (1) has an empty slot (101) in the middle, a water storage tank body (2) is embedded in the empty slot (101), a pipe slot (102) is provided on the inner wall of the waste heat recovery tank body (1), a heat transfer pipe (14) is installed in the pipe slot (102), and the heat transfer pipe (14) is arranged in close contact with the water storage tank body (2); the bottom of both ends of the side of the waste heat recovery tank body (1) are respectively provided with an exhaust pipe port (4) and an intake pipe port (6); the bottom of the interior of the waste heat recovery tank body (1) is provided with a first filter screen (7) and a second filter screen (8), and a knocking mechanism is provided between the first filter screen (7) and the second filter screen (8).

2. The industrial silicon furnace waste heat utilization device according to claim 1, characterized in that: The water storage box (2) is provided with a water inlet (201) and a water outlet (202), respectively, and valves are installed on the water inlet (201) and the water outlet (202).

3. The industrial silicon furnace waste heat utilization device according to claim 1, characterized in that: The tops of both ends of the side of the waste heat recovery tank body (1) are respectively provided with a water inlet pipe opening (5) and a drainage pipe opening (3), the water inlet pipe opening (5) and the drainage pipe opening (3) are respectively connected to the two ends of the heat transfer pipe (14), the water inlet pipe opening (5) is connected to the drainage port of the silicon furnace, and the drainage pipe opening (3) is connected to the drainage pool.

4. The industrial silicon furnace waste heat utilization device according to claim 1, characterized in that: The bottom through-card of the waste heat recovery tank body (1) is provided with four dust collecting boxes (9), and the four dust collecting boxes (9) are respectively arranged below the two sides of the first filter screen (7) and the second filter screen (8).

5. The industrial silicon furnace waste heat utilization device according to claim 1, characterized in that: The knocking mechanism comprises a rotating motor (10), a connecting rod (11), a spring (12) and a knocking ball (13); the rotating motor (10) is installed at the bottom of the waste heat recovery tank (1); the connecting rod (11) is arranged at the output end of the rotating motor (10); the spring (12) is installed at the end of the connecting rod (11); and the knocking ball (13) is connected to the connecting rod (11) through the spring (12).

6. The industrial silicon furnace waste heat utilization device according to claim 1, characterized in that: The pipe groove (102) and the hot water transfer pipe (14) are both arranged in a zigzag shape, and the end of the exhaust pipe port (4) is provided with a flange (401) for contacting the steam turbine generator set.

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