Dust-containing denitration equipment for high-temperature flue gas of industrial silicon furnace

Abstract

The utility model discloses dust-containing denitration equipment for high-temperature flue gas of an industrial silicon furnace, belongs to the technical field of flue gas denitration, and aims to solve the problems in the prior art that dust is treated through a filter screen, and the high-temperature flue gas contains some unburned substances, so that the damage effect on the filter screen is relatively large, and the filter screen needs to be frequently replaced. Comprising a working table and an atomizing nozzle, the working table is arranged in a step shape, a water tank is arranged on the upper surface of the working table, an air guide assembly is arranged on the water tank, a communicating pipe is connected to the upper end of the side face of the water tank, the other end of the communicating pipe is connected with a filter tank, a filter screen is movably installed on the filter tank, a connecting pipe is arranged at the upper end of the filter tank, and the other end of the connecting pipe is connected with a tank body. According to the dust-containing denitration equipment for the high-temperature flue gas of the industrial silicon furnace, through cooperative use of the water tank and the gas guide assembly, unburned substances in the high-temperature flue gas can be prevented from damaging the filter screen, the service life of the filter screen is prolonged, and the water tank can further preliminarily filter dust of the high-temperature flue gas.

Description

Technical Field

[0001] The utility model belongs to the technical field of flue gas denitration, and in particular relates to dust-containing denitration equipment for high-temperature flue gas from an industrial silicon furnace. Background Art

[0002] When silicon is smelted in an industrial silicon furnace, a large amount of high-temperature flue gas containing dust and nitrates will be generated. In order to prevent these high-temperature flue gases from being directly discharged into the air and polluting the environment, dust removal and denitrification equipment is needed to treat the high-temperature flue gas.

[0003] First, the high-temperature flue gas is subjected to dust removal operations (to prevent dust from covering the surface of the spray liquid and affecting the reaction of the spray liquid with nitrogen oxides, and to spraying urea solution or ammonia water during denitrification). Under the existing technology, the dust is processed through a filter, and the high-temperature flue gas contains some unburned substances, which have a greater damage effect on the filter, and the filter needs to be replaced frequently. Therefore, a technical measure is proposed to solve the problem that the dust is processed through a filter under the existing technology, and the high-temperature flue gas contains some unburned substances, which have a greater damage effect on the filter, and the filter needs to be replaced frequently. Utility Model Content

[0004] (1) Technical problems to be solved

[0005] In response to the shortcomings of the existing technology, the purpose of this utility model is to provide a dust denitrification equipment for high-temperature flue gas from an industrial silicon furnace, aiming to solve the problem that the dust is processed through a filter under the existing technology, and the high-temperature flue gas contains some unburned substances, which have a great damaging effect on the filter, and the filter needs to be replaced frequently.

[0006] (2) Technical solution

[0007] In order to solve the above technical problems, the utility model provides such an industrial silicon furnace high-temperature flue gas dust denitrification equipment, including a workbench and an atomizing nozzle, the workbench is arranged in a stepped shape, the upper surface of the workbench is provided with a water tank, the water tank is provided with an air guide component, the upper end of the side of the water tank is connected to a connecting pipe, the other end of the connecting pipe is connected to a filter box, the filter box is movably installed with a filter screen, the upper end of the filter box is provided with a connecting pipe, the other end of the connecting pipe is connected to a tank body, thanks to the coordinated use of the water tank and the air guide component, it can prevent unburned substances in the high-temperature flue gas from damaging the filter screen, thereby improving the service life of the filter screen, and the water tank can also perform preliminary filtration of dust in the high-temperature flue gas.

[0008] Furthermore, a base frame is provided on the lower surface of the workbench, the tank body is installed at one end at the height of the upper surface of the workbench, and the water tank and the filter box are installed at the lower end of the upper surface of the workbench.

[0009] Furthermore, a discharge pipe is provided at the upper end of the tank body, an exhaust fan is provided in the discharge pipe, a delivery pipe is passed through the side of the tank body, the delivery pipe is connected to an external ammonia delivery mechanism, and multiple groups of atomizing nozzles are installed at the lower part of the delivery pipe.

[0010] Furthermore, a tank cover is threadedly mounted on the upper end of the water tank, a water injection pipe is provided on the upper surface of the tank cover, and a pipe cover is movably provided on the water injection pipe. Thanks to the setting of the water tank, it is convenient to extinguish unburned materials and prevent the filter from being affected.

[0011] Furthermore, a drain pipe is provided at the lower end of the side of the water tank, and a valve is provided on the drain pipe.

[0012] Furthermore, the air guide component includes a hose, which is connected to the gas pipeline, and the hose is connected to a vertical pipe. The vertical pipe is L-shaped, and a disc is connected to the lower end of the vertical pipe. The vertical pipe passes through the box cover. Thanks to the setting of the air guide component, the contact surface area between the high-temperature flue gas and water is increased, thereby improving the initial dust removal effect on the flue gas and at the same time improving the removal effect of unburned substances.

[0013] Furthermore, the disc is equipped with two groups of symmetrically distributed transverse tubes, the other ends of the transverse tubes are connected to a ring, and the lower surface of the ring is equipped with multiple groups of evenly distributed air guide tubes, which are small at the bottom and large at the top.

[0014] (3) Beneficial effects

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] The utility model increases the contact surface area between high-temperature flue gas and water through the arrangement of the air guide component, thereby improving the initial dust removal effect on the flue gas and at the same time improving the removal effect of unburned substances. The high-temperature flue gas enters the air guide pipe through the hose and the vertical pipe, then enters the ring through the horizontal pipe, and finally enters the water through the air guide pipe. The high-temperature flue gas entering the water contacts with the water, and a part of the dust is directly dissolved in the water, and the clean water can extinguish the unburned substances.

[0017] The setting of the water tank makes it convenient to extinguish unburned materials and prevent them from affecting the filter. The high-temperature flue gas enters the water tank through the gas guide component. The water inside the water tank preliminarily absorbs the dust in the flue gas and extinguishes and absorbs the unburned materials.

[0018] By using the water tank in conjunction with the gas guide assembly, unburned materials in the high-temperature flue gas can be prevented from damaging the filter, thus increasing the service life of the filter. The water tank can also perform preliminary filtration of dust in the high-temperature flue gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 It is a structural diagram of the utility model;

[0021] Figure 2 Schematic diagram of the water tank structure;

[0022] Figure 3 It is a schematic diagram of the connection structure between the delivery pipe and the atomizing nozzle;

[0023] Figure 4 Schematic diagram of the gas guide component structure.

[0024] The marks in the accompanying drawings are: 1. workbench; 2. air guide assembly; 3. water tank; 4. filter box; 5. filter screen; 6. base frame; 7. connecting pipe; 8. tank body; 9. discharge pipe; 10. exhaust fan; 11. delivery pipe; 12. pipe cover; 13. water injection pipe; 14. drain pipe; 15. valve; 16. connecting pipe; 17. atomizing nozzle; 18. box cover; 201. hose; 202. vertical pipe; 203. horizontal pipe; 204. ring; 205. air guide pipe; 206. disc. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] This specific embodiment is an industrial silicon furnace high temperature flue gas dust denitrification equipment, and its structural diagram is as follows Figure 1 、 Figure 2 、 Figure 3As shown, it includes a workbench 1 and an atomizing nozzle 17. The workbench 1 is arranged in a stepped shape. A water tank 3 is provided on the upper surface of the workbench 1. An air guide component 2 is provided on the water tank 3. The upper end of the side of the water tank 3 is connected to a connecting pipe 16. The other end of the connecting pipe 16 is connected to a filter box 4. The filter box 4 is movably installed with a filter screen 5. A connecting pipe 7 is provided on the upper end of the filter box 4. The other end of the connecting pipe 7 is connected to a tank body 8. A base frame 6 is provided on the lower surface of the workbench 1. The tank body 8 is installed at one end at the height of the upper surface of the workbench 1. The water tank 3 and the filter box 4 are installed on the upper surface of the workbench 1. At the lower end, a discharge pipe 9 is provided on the upper end of the tank body 8, an exhaust fan 10 is provided in the discharge pipe 9, a delivery pipe 11 is passed through the side of the tank body 8, the delivery pipe 11 is connected to the external ammonia delivery mechanism, a plurality of atomizing nozzles 17 are installed at the lower part of the delivery pipe 11, a box cover 18 is threadedly installed on the upper end of the water tank 3, a water injection pipe 13 is provided on the upper surface of the box cover 18, a pipe cover 12 is movably provided on the water injection pipe 13, a drain pipe 14 is provided at the lower end of the side of the water tank 3, a valve 15 is provided on the drain pipe 14, and when the high-temperature flue gas is subjected to dust removal and denitrification operations, water is supplied to the water tank 3 through the water injection pipe 13. Clean water is injected into the box 3, and the high-temperature flue gas is transported to the inside of the water tank 3 through the air guide component 2 to extinguish the unburned materials contained in the high-temperature flue gas. When the water inside the water tank 3 needs to be discharged, the water is allowed to flow out by opening the valve 15. When there are more impurities inside the water tank 3, the water tank 3 is cleaned by opening the box cover 18. Then the flue gas with preliminary dust removal enters the filter box 4 through the connecting pipe 16. Under the action of the filter screen 5, the dust in the flue gas is further filtered, and then the filtered flue gas enters the tank through the connecting pipe 7 8 performs denitrification operation, and ammonia water is transported to the transport pipe 11 through an external transport mechanism. The ammonia water is then sprayed on the flue gas through the atomizing nozzle 17. The nitrogen oxides in the flue gas directly react with the ammonia water to generate nitrogen and water. The flue gas is then discharged through the exhaust pipe 9. When the flue gas enters, the exhaust fan 10 is started to drive the flue gas to move toward the exhaust pipe 9 of the tank body 8 (the pumping action of the exhaust fan 10 causes the flue gas to flow toward the exhaust pipe 9, and the exhaust speed of the exhaust fan 10 does not need to be too fast to prevent the atomized ammonia water droplets from being drawn out).

[0027] Reference Figure 1 、 Figure 2 、 Figure 4 As shown, the air guide component 2 includes a hose 201, which is connected to the gas pipeline. The hose 201 is connected to a vertical pipe 202, which is L-shaped. The lower end of the vertical pipe 202 is connected to a disc 206, which passes through the box cover 18. The disc 206 is equipped with two groups of symmetrically distributed horizontal pipes 203, and the other end of the horizontal pipe 203 is connected to a ring 204. The lower surface of the ring 204 is equipped with multiple groups of evenly distributed air guide pipes 205, which are small at the bottom and large at the top. The high-temperature flue gas enters the air guide pipe 205 through the hose 201 and the vertical pipe 202, and then enters the ring 204 through the horizontal pipe 203. Finally, the high-temperature flue gas enters the water through the air guide pipe 205, and the high-temperature flue gas entering the water tank comes into contact with the water.

[0028] Working principle: When performing dust removal and denitrification operations on high-temperature flue gas, clean water is injected into the water tank 3 through the water injection pipe 13, and the high-temperature flue gas is transported to the water tank 3 through the air guide component 2. Specifically, the high-temperature flue gas enters the air guide pipe 205 through the hose 201 and the vertical pipe 202, and then enters the ring 204 through the horizontal pipe 203. Finally, the high-temperature flue gas enters the water through the air guide pipe 205. The high-temperature flue gas entering the water tank contacts with the water, and part of the dust is directly dissolved in the water. In addition, the clean water can be used to treat the unburned substances. Extinguished (unburned substances remain in the water). When the water inside the water tank 3 needs to be discharged, the water is allowed to flow out by opening the valve 15. When there are a lot of impurities inside the water tank 3, the water tank 3 is cleaned by opening the tank cover 18. The setting of the air guide component 2 increases the contact surface area between the high-temperature flue gas and the water, thereby improving the initial dust removal effect on the flue gas and the removal effect of the unburned substances. The setting of the water tank 3 facilitates the extinguishing of the unburned substances and prevents the filter 5 from being affected.

[0029] The flue gas that has undergone preliminary dust removal then enters the filter box 4 through the connecting pipe 16. Under the action of the filter screen 5, the dust in the flue gas is further filtered. The filtered flue gas then enters the tank body 8 through the connecting pipe 7 for denitrification. Ammonia water is transported to the delivery pipe 11 through an external delivery mechanism. The ammonia water is then sprayed on the flue gas through the atomizing nozzle 17. The nitrogen oxides in the flue gas directly react with the ammonia water to generate nitrogen and water. The flue gas is then discharged through the exhaust pipe 9. When the flue gas enters, the exhaust fan 10 is started to drive the flue gas to move toward the exhaust pipe 9 of the tank body 8 (the pumping action of the exhaust fan 10 causes the flue gas to flow toward the exhaust pipe 9, and the exhaust speed of the exhaust fan 10 does not need to be too fast to prevent the atomized ammonia water droplets from being drawn out).

[0030] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. Industrial silicon furnace high temperature flue gas dust denitrification equipment, comprising a workbench (1) and an atomizing nozzle (17), characterized in that: The workbench (1) is arranged in a stepped shape. A water tank (3) is provided on the upper surface of the workbench (1). An air guide assembly (2) is provided on the water tank (3). A connecting pipe (16) is connected to the upper end of the side of the water tank (3). The other end of the connecting pipe (16) is connected to a filter box (4). A filter screen (5) is movably installed on the filter box (4). A connecting pipe (7) is provided at the upper end of the filter box (4). The other end of the connecting pipe (7) is connected to a tank body (8).

2. The industrial silicon furnace high temperature flue gas dust denitrification equipment according to claim 1, characterized in that: The lower surface of the workbench (1) is provided with a base frame (6), the tank body (8) is installed with one end at the same height as the upper surface of the workbench (1), and the water tank (3) and the filter box (4) are installed at the lower end of the upper surface of the workbench (1).

3. The industrial silicon furnace high temperature flue gas dust denitrification equipment according to claim 1, characterized in that: The upper end of the tank body (8) is provided with a discharge pipe (9), and an exhaust fan (10) is provided in the discharge pipe (9). A delivery pipe (11) is passed through the side of the tank body (8), and the delivery pipe (11) is connected to an external ammonia delivery mechanism. A plurality of atomizing nozzles (17) are installed at the lower part of the delivery pipe (11).

4. The industrial silicon furnace high temperature flue gas dust denitrification equipment according to claim 1, characterized in that: The upper end of the water tank (3) is threadedly mounted with a tank cover (18), the upper surface of the tank cover (18) is provided with a water injection pipe (13), and the water injection pipe (13) is movably provided with a pipe cover (12).

5. The industrial silicon furnace high temperature flue gas dust denitrification equipment according to claim 4, characterized in that: A drain pipe (14) is provided at the lower end of the side of the water tank (3), and a valve (15) is provided on the drain pipe (14).

6. The industrial silicon furnace high temperature flue gas dust denitrification equipment according to claim 5, characterized in that: The air guide assembly (2) comprises a hose (201), the hose (201) being connected to a gas pipeline, the hose (201) being connected to a vertical pipe (202), the vertical pipe (202) being L-shaped, the lower end of the vertical pipe (202) being connected to a disc (206), and the vertical pipe (202) passing through the box cover (18).

7. The industrial silicon furnace high temperature flue gas dust denitrification equipment according to claim 6, characterized in that: The disc (206) is equipped with two groups of symmetrically distributed transverse tubes (203), the other end of the transverse tube (203) is connected to a circular ring (204), and the lower surface of the circular ring (204) is equipped with multiple groups of evenly distributed air guide tubes (205), and the air guide tubes (205) are small at the bottom and large at the top.

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