Flue gas purification dust remover for metal silicon preparation

Abstract

The utility model discloses a flue gas purification dust remover for preparing metal silicon. The flue gas purification dust remover comprises a smelting furnace, a flue gas inlet, a raw material preheating pool, a cooling device and a dust removal filter, the dust removal filter is arranged on the right side of the cooling device, the first three-way valve, the second three-way valve and the filters are matched, the two filters are in threaded connection with the first three-way valve and the second three-way valve through the detachable pipe joints, and the dust removal effect is achieved through adjustment of the first three-way valve and the second three-way valve. When a large amount of dust is accumulated in one set of filters, the flow direction of the smoke can be changed by adjusting the first three-way valve and the second three-way valve, the smoke flows into the other set of filters, and at the moment, a user can replace the filter with the large amount of dust accumulated. Therefore, the filtering resistance is reduced, and the filtering efficiency of the filter is improved.

Description

Technical Field

[0001] The utility model relates to the field related to silicon production, in particular to a flue gas purification and dust removal device for metal silicon preparation. Background Art

[0002] Metallic silicon is also called crystalline silicon or industrial silicon. The main component of metallic silicon is silicon, so it has similar properties to silicon. Its main use is as an additive for non-ferrous alloys. Metallic silicon is a product smelted from quartz and coke in an electric furnace. The content of the main component silicon is about 98%, and the remaining impurities are iron, aluminum, calcium, etc. Silicon is used in large quantities to smelt ferrosilicon alloys as alloying elements in the steel industry and as a reducing agent in many kinds of metal smelting. Silicon is also a good component in aluminum alloys, and most cast aluminum alloys contain silicon. Silicon is the raw material for ultra-pure silicon in the electronics industry. Electronic devices made of ultra-pure semiconductor single crystal silicon have the advantages of small size, light weight, good reliability and long life. A large amount of flue gas will be generated during the production of silicon. The flue gas contains a large amount of smoke and sulfur-containing pollutants. If it is directly discharged into the atmosphere, it will cause a certain degree of pollution to the atmosphere. Therefore, the flue gas generated during the production of metallic silicon needs to be treated.

[0003] The optimization of the flue gas treatment device for silicon production and processing in the prior art is mostly reflected in improving production efficiency. For example, a Chinese patent document with publication number CN209662882U discloses a flue gas treatment device for silicon production, including a smelting furnace, a flue gas inlet is arranged above the smelting furnace, a raw material preheating pool is arranged on the right side of the smelting furnace, an intermediate heat conduction pipe is arranged on the outer surface around the bottom of the raw material preheating pool, the upper end of the flue gas inlet is connected to the flue gas inlet pipe, a fan is installed between the flue gas inlet pipe and the intermediate heat conduction pipe, the input end and the output end of the fan are fixedly connected to the flue gas inlet pipe and the intermediate heat conduction pipe respectively, a cooling device is arranged on the right side of the raw material preheating pool, and a desulfurization device is installed on the right side of the cooling device. The structure is simple, the construction is clear and easy to understand, and the flue gas in the silicon production process can be fully utilized for preheating silicon raw materials, reducing costs and accelerating silicon production efficiency; at the same time, the flue gas is cooled and desulfurized to avoid air pollution caused by direct emissions.

[0004] Although the above device has certain advantages in improving production efficiency, it still has certain shortcomings:

[0005] The flue gas passes through the iron oxide layer, silica gel layer, activated carbon layer and filter cotton layer in turn for desulfurization and filtration, and then the flue gas is discharged into the atmosphere through the outlet pipe. After long-term use, the above-mentioned filtering device will accumulate a large amount of dust, increase the filtration resistance, and thus reduce the efficiency of flue gas purification. Utility Model Content

[0006] Therefore, in order to solve the above-mentioned shortcomings, the utility model provides a flue gas purification and dust removal device for preparing metallic silicon.

[0007] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a flue gas purification and dust removal device for metal silicon preparation, comprising a smelting furnace, a flue gas inlet, a raw material preheating pool, a cooling device, and a dust removal filter. A flue gas inlet is arranged above the smelting furnace, a raw material preheating pool is arranged on the right side of the smelting furnace, and a cooling device is arranged on the right side of the raw material preheating pool; the dust removal filter is arranged on the right side of the cooling device, and the dust removal filter comprises an outer box body, a door leaf, an air intake manifold, a first three-way valve, a filter, a fixing part, a second three-way valve, an air outlet manifold, a first air pump, and the outer A door leaf is provided at the front end of the box body, the air intake main pipe passes through the top of the outer box body to reach the inside of the outer box body, the air intake main pipe is connected with a first three-way valve, both ends of the first three-way valve are connected to the top of the filter, the filter is provided with two groups, the outer surfaces of the two groups of filters are provided with fixings, the fixings are detachably connected to the inner wall of the outer box body, a second three-way valve is provided at the bottom end of the filter, the bottom of the second three-way valve is connected with an air outlet main pipe, the air outlet main pipe passes through the bottom of the outer box body to reach the outside of the outer box body, and a first air pump is provided on the air intake main pipe.

[0008] As a further solution of the utility model, both ends of the two groups of filters are provided with detachable pipe joints, which are threadedly connected to the first three-way valve and the second three-way valve. The detachable pipe joints make it easy to disassemble and install the filters.

[0009] As a further solution of the utility model, the flue gas inlet is connected to the raw material preheating tank through a first gas pipe, and the first gas pipe is used to transport the flue gas to the raw material preheating tank.

[0010] As a further solution of the utility model, a second air pump is provided on the first air supply pipe, and the second air pump ensures that the smoke in the first air supply pipe flows in one direction.

[0011] As a further solution of the utility model, the raw material preheating pool is connected to the cooling device through a second gas pipe, and the second gas pipe is used to transport the flue gas to the cooling device.

[0012] As a further solution of the utility model, a third air pump is provided on the second air supply pipe, and the third air pump ensures that the smoke in the second air supply pipe flows in one direction.

[0013] As a further solution of the utility model, the cooling device includes a cooling box, a water inlet, a water outlet, and a flue gas pipe. The cooling box is provided with a water inlet at the upper end, a water outlet is provided at the bottom of the right side of the cooling box, a flue gas pipe is provided at the top end of the right side of the cooling box, the flue gas pipe is connected to the air intake main pipe, distilled water is placed in the cooling device, and the cooling device is used to cool and purify water-soluble impurities in the flue gas.

[0014] Compared with the prior art, the utility model provides a flue gas purification dust collector for metal silicon preparation, which has the following beneficial effects:

[0015] In the utility model, a dust removal filter is arranged on the right side of the cooling device, and the cooperation between the first three-way valve, the second three-way valve and the filter is utilized, and the two groups of filters are threadedly connected with the first three-way valve and the second three-way valve through a detachable pipe joint. By adjusting the first three-way valve and the second three-way valve, the smoke can pass through one of the groups of filters alone. When a large amount of dust is accumulated in one group of filters, the flow direction of the smoke can be changed by adjusting the first three-way valve and the second three-way valve, so that the smoke flows to the other group of filters. At this time, the user can replace the filter with a large amount of dust accumulated, thereby reducing the filtering resistance and improving the filtering efficiency of the filter. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0017] Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model;

[0018] Figure 3 This is a schematic diagram of the three-dimensional structure of the dust removal filter of the utility model;

[0019] Figure 4 It is a schematic diagram of the cross-sectional structure of the dust removal filter of the utility model;

[0020] Figure 5 It is a schematic diagram of the cross-sectional structure of the cooling device of the utility model.

[0021] Among them: smelting furnace-1, flue gas inlet-2, first gas pipe-21, second vacuum pump-22, raw material preheating pool-3, second gas pipe-31, third vacuum pump-32, cooling device-4, cooling box-41, water inlet-42, water outlet-43, flue gas pipe-44, dust filter-5, outer box body-51, door leaf-52, air inlet main pipe-53, first three-way valve-54, filter-55, detachable pipe joint-551, fixing part-56, second three-way valve-57, air outlet main pipe-58, first vacuum pump-59. DETAILED DESCRIPTION

[0022] In order to further explain the technical solution of the present utility model, it is described in detail through specific embodiments below.

[0023] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0024] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0025] See also Figure 1-2 In the present utility model embodiment:

[0026] A flue gas purification and dust removal device for preparing metallic silicon comprises a smelting furnace 1, a flue gas inlet 2, a raw material preheating pool 3, and a cooling device 4. The flue gas inlet 2 is arranged above the smelting furnace 1, the raw material preheating pool 3 is arranged on the right side of the smelting furnace 1, and the cooling device 4 is arranged on the right side of the raw material preheating pool 3.

[0027] See also Figure 3-4In the embodiment of the utility model, it also includes a dust removal filter 5, which is arranged on the right side of the cooling device 4. The dust removal filter 5 includes an outer box body 51, a door leaf 52, an air intake manifold 53, a first three-way valve 54, a filter 55, a fixing member 56, a second three-way valve 57, an air outlet manifold 58, and a first air pump 59. The front end of the outer box body 51 is provided with a door leaf 52, and the air intake manifold 53 passes through the top of the outer box body 51 to reach the inside of the outer box body 51. The air intake manifold 53 is connected to the first three-way valve 54. The two ends of the first three-way valve 54 are connected to the top of the filter 55. The filter 55 is provided with two groups. The outer surfaces of the two groups of filters 55 are provided with fixing parts 56. The fixing parts 56 are detachably connected to the inner wall of the outer box body 51. The bottom end of the filter 55 is provided with a second three-way valve 57. The bottom of the second three-way valve 57 is connected to the air outlet main pipe 58. The air outlet main pipe 58 passes through the bottom of the outer box body 51 to reach the outside of the outer box body 51. The air intake main pipe 53 is provided with a first air pump 59.

[0028] See also Figure 1-4 In the embodiment of the utility model: both ends of the two groups of filters 55 are provided with detachable pipe joints 551, and the detachable pipe joints 551 are threadedly connected to the first three-way valve 54 and the second three-way valve 57. The detachable pipe joints 551 make it easy to disassemble and install the filters 55.

[0029] See also Figure 1-4 In the embodiment of the utility model: the flue gas inlet 2 is connected to the raw material preheating pool 3 through a first gas pipe 21, and the first gas pipe 21 is used to transport the flue gas to the raw material preheating pool 3.

[0030] See also Figure 1-4 In the embodiment of the utility model: a second air pump 22 is provided on the first air pipe 21, and the second air pump 22 ensures that the smoke in the first air pipe 21 flows in one direction.

[0031] See also Figure 1-4 In an embodiment of the utility model: the raw material preheating pool 3 is connected to the cooling device 4 through a second gas pipe 31, and the second gas pipe 31 is used to transport the flue gas to the cooling device 4.

[0032] See also Figure 1-4 In the embodiment of the utility model: a third air pump 32 is provided on the second air supply pipe 31, and the third air pump 32 ensures that the smoke in the second air supply pipe 31 flows in one direction.

[0033] See also Figure 5In the embodiment of the utility model: the cooling device 4 includes a cooling box 41, a water inlet 42, a water outlet 43, and a flue gas pipe 44. The cooling box 41 is provided with a water inlet 42 at the upper end, and a water outlet 43 is provided at the bottom of the right side of the cooling box 41. A flue gas pipe 44 is provided at the top right side of the cooling box 41, and the flue gas pipe 44 is connected to the air intake main pipe 53. Distilled water is placed in the cooling device 4, and the cooling device 4 is used to cool and purify water-soluble impurities in the flue gas.

[0034] Here’s how it works:

[0035] When in use, the user first places metallic silicon in the smelting furnace 1 for smelting. The flue gas generated during the smelting process enters the first air pipe 21 through the flue gas inlet 2 under the action of the second air pump 22, flows through the raw material preheating pool 3 through the first air pipe 21 to preheat the flue gas, and under the action of the third air pump 32, the flue gas is input into the second air pipe 31, and the flue gas is transported to the cooling device 4 through the second air pipe 31. Distilled water is placed in the cooling device 4, and the cooling device 4 is used to cool and purify water-soluble impurities in the flue gas. At this time, the first air pump 59 is started. Under the action of the first air pump 59, the flue gas enters the air intake main pipe 53 and passes through the filter 55 for dust removal and desulfurization. When a large amount of dust accumulates in one group of filters 55, the user can adjust the first three-way valve 54 and the second three-way valve 57 to change the flow direction of the flue gas so that the flue gas flows to another group of filters 55. The user removes the filter 55 through the detachable pipe joint 551 and replaces it with a new filter 55.

[0036] The control method of the present invention is to control by manually starting and closing the switch. The wiring diagram of the power element and the provision of power supply are common knowledge in the field, and the present invention is mainly used to protect mechanical devices, so the present invention will not explain the control method and wiring arrangement in detail.

[0037] The control method of the present invention is automatic control through a controller. The control circuit of the controller can be realized by simple programming by technicians in this field. The provision of power is also common knowledge in this field. The present invention is mainly used to protect mechanical devices, so the present invention will no longer explain the control method and circuit connection in detail.

[0038] The above description is only a preferred example of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions described in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A flue gas purification and dust removal device for preparing metallic silicon, comprising a smelting furnace (1), a flue gas inlet (2), a raw material preheating pool (3), and a cooling device (4), wherein the flue gas inlet (2) is arranged above the smelting furnace (1), the raw material preheating pool (3) is arranged on the right side of the smelting furnace (1), and the cooling device (4) is arranged on the right side of the raw material preheating pool (3); Features: The cooling device (4) further comprises a dust removal filter (5), wherein the dust removal filter (5) is arranged on the right side of the cooling device (4), and the dust removal filter (5) comprises an outer box (51), a door leaf (52), an air intake manifold (53), a first three-way valve (54), a filter (55), a fixing member (56), a second three-way valve (57), an air outlet manifold (58), and a first air pump (59). The front end of the outer box (51) is provided with a door leaf (52), the air intake manifold (53) passes through the top of the outer box (51) and reaches the interior of the outer box (51), and the air intake manifold (53) and the first three-way valve (54) are connected to each other. The two ends of the first three-way valve (54) are connected to the top of the filter (55), and the filter (55) is provided with two groups. The outer surfaces of the two groups of filters (55) are provided with fixing parts (56), and the fixing parts (56) are detachably connected to the inner wall of the outer box body (51). The bottom end of the filter (55) is provided with a second three-way valve (57), and the bottom of the second three-way valve (57) is connected to the air outlet main pipe (58), and the air outlet main pipe (58) passes through the bottom of the outer box body (51) to reach the outside of the outer box body. The air intake main pipe (53) is provided with a first air pump (59).

2. The flue gas purification and dust removal device for preparing metallic silicon according to claim 1, characterized in that: Both ends of the two groups of filters (55) are provided with detachable pipe joints (551), and the detachable pipe joints (551) are threadedly connected to the first three-way valve (54) and the second three-way valve (57).

3. The flue gas purification and dust removal device for preparing metallic silicon according to claim 1, characterized in that: The flue gas inlet (2) is connected to the raw material preheating pool (3) via a first gas transmission pipe (21).

4. The flue gas purification and dust removal device for preparing metallic silicon according to claim 3, characterized in that: The first air delivery pipe (21) is provided with a second air pump (22).

5. The flue gas purification and dust removal device for preparing metallic silicon according to claim 1, characterized in that: The raw material preheating pool (3) is connected to the cooling device (4) via a second gas transmission pipe (31).

6. The flue gas purification and dust removal device for preparing metallic silicon according to claim 5, characterized in that: The second air delivery pipe (31) is provided with a third air pump (32).

7. The flue gas purification and dust removal device for preparing metallic silicon according to claim 1, characterized in that: The cooling device (4) comprises a cooling box (41), a water inlet (42), a water outlet (43), and a smoke pipe (44); the cooling box (41) is provided with a water inlet (42) at the upper end; the cooling box (41) is provided with a water outlet (43) at the bottom of the right side; the smoke pipe (44) is provided at the top end of the right side of the cooling box (41); and the smoke pipe (44) is connected to an air intake main pipe (53).

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