Dust suction pipe and non-metal electric arc furnace

Abstract

The utility model belongs to the field of non-metal electric arc furnaces, and particularly relates to a dust suction pipe and a non-metal electric arc furnace. When the dust suction pipe is used, the end, away from a four-way pipe connector, of a dust suction cover is in butt joint with a dust suction opening in the side face of a furnace cover, and a pipe connector in the side wall of the lower end of a main pipe body is connected with dust removal equipment through a pipeline; dust-containing flue gas in the furnace body is sucked into the dust suction pipe through the dust suction opening under the action of negative pressure, and due to the fact that the main pipe body is vertically arranged, the dust-containing flue gas enters through the dust suction cover, then collides with the inner sides of the first sealing cover and the second sealing cover at the position of the four-way pipe connector and turns downwards to enter the main pipe body. When the dust suction hood is used, only the first sealing cover and the second sealing cover need to be opened, crusts accumulated in the covers can be removed, meanwhile, after the first sealing cover and the second sealing cover are opened, crusts on the inner wall of the dust suction hood and the inner wall of the four-way pipe connector can be conveniently removed through the third connector and the fourth connector of the four-way pipe connector, operation is easy, and time and labor are saved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of non-metal electric arc furnaces, in particular to a dust extraction pipe and a non-metal electric arc furnace. BACKGROUND

[0002] A non-metal electric arc furnace refers to an electric arc furnace mainly used for melting non-metallic materials (such as graphite, ceramics, glass, etc.) during the smelting process. Compared with traditional metal electric arc furnaces, this type of furnace has different design and operation characteristics. The high temperature generated in the furnace is combined with a strong electric arc, which makes the non-metallic materials reach a molten state in a short time, thereby realizing an efficient production process.

[0003] The problem of crust formation near the dust extraction port inside the dust extraction pipe is a difficulty in the production of zirconia furnaces in non-metal smelting furnaces. During smelting, the silicon in the zirconia sand is oxidized and reduced to silicon dioxide gas under high-temperature oxidation conditions. When these gases pass through the dust extraction port of the furnace cover, the gas cools down due to the drop in ambient temperature, and eventually forms a solid silicon deposit, which causes crust formation near the dust extraction port inside the dust extraction pipe. Once the crust is formed, it will gradually block the dust extraction pipe, seriously affecting the ventilation and smoke exhaust efficiency of the system. Therefore, the crust inside the pipe needs to be cleaned regularly to ensure normal production. In existing non-metal electric arc furnaces, the dust extraction pipe connected to the dust extraction port is usually a vertical pipe arranged vertically or an inclined pipe arranged obliquely. When cleaning the crust inside the pipe later, it is difficult and time-consuming. CONTENT OF THE UTILITY MODEL

[0004] The present application provides a dust extraction pipe and a non-metal electric arc furnace, which aims to facilitate the subsequent cleaning of the crust inside the dust extraction pipe.

[0005] To this end, according to one aspect of the present application, a dust extraction pipe is provided, which is suitable for a non-metal electric arc furnace, the non-metal electric arc furnace comprising a furnace body and a furnace cover arranged on the top of the furnace body, the side of the furnace cover being provided with a dust extraction port, the dust extraction pipe comprising a dust extraction cover, a four-way pipe joint, a main pipe body, a first sealing cover and a second sealing cover, a first interface of the four-way pipe joint being connected to one end of the dust extraction cover, the other end of the dust extraction cover being used to butt joint the dust extraction port, the main pipe body being arranged vertically, the top of the main pipe body being connected to a second interface of the four-way pipe joint, the first sealing cover being arranged on a third interface of the four-way pipe joint, the second sealing cover being arranged on a fourth interface of the four-way pipe joint, and a pipe interface for connecting a pipeline being arranged on the lower end side wall of the main pipe body.

[0006] Optionally, the edge of the first sealing cover is hinged to the third interface, and the first sealing cover can rotate relative to the hinge to open and close the third interface.

[0007] The edge of the second sealing cover is hinged to the fourth interface, and the second sealing cover can rotate relative to the hinge to open and close the fourth interface.

[0008] Optionally, the lower end of the main pipe body is provided with a slag discharge port, and a slag discharge door is arranged on the slag discharge port, and the slag discharge door is used to open and close the slag discharge port.

[0009] Optionally, the dust extraction pipe further comprises a fixing support mounted on the main pipe body, and the fixing support is used to be fixed on the furnace body or is used to be fixed on the same carrier as the furnace body, so that the main pipe body and the furnace body remain relatively static.

[0010] According to another aspect of the present application, a non-metal electric arc furnace is provided, comprising a furnace body, a furnace cover arranged on the top of the furnace body, and a dust extraction pipe as described above, the side of the furnace cover is provided with a dust extraction port, and the dust extraction cover on the dust extraction pipe is connected to the dust extraction port.

[0011] Optionally, the furnace cover comprises:

[0012] a cylinder body, the side of which is provided with the dust extraction port;

[0013] a first water cooling plate arranged at the bottom of the cylinder body, the first water cooling plate is used to be mounted on the opening on the top of the furnace body, the middle part of the first water cooling plate is provided with a avoiding hole, the inside of the first water cooling plate is provided with a first water cooling cavity, and the side of the first water cooling plate is provided with a first water inlet pipe and a first water outlet pipe in communication with the first water cooling cavity; and

[0014] a second water cooling plate arranged at the top of the cylinder body, the second water cooling plate is provided with a charging hole and three electrode holes, the projections of the charging hole and the three electrode holes in the vertical direction fall into the avoiding hole on the first water cooling plate, the inside of the second water cooling plate is provided with a second water cooling cavity, and the side of the second water cooling plate is provided with a second water inlet pipe and a second water outlet pipe in communication with the second water cooling cavity.

[0015] Optionally, the first water cooling plate and the second water cooling plate are both hollow sandwich structures.

[0016] The dust extraction pipe and the non-metal electric arc furnace provided by the application have the following beneficial effects: compared with the prior art, when the dust extraction pipe is used, the end of the dust extraction cover away from the four-way pipe joint is connected to the dust extraction port on the side of the furnace cover, the pipe interface on the side wall of the lower end of the main pipe body is connected to the dust removal equipment (such as a bag-type dust collector) through a pipeline, and during the non-metal smelting process, the dust-containing flue gas in the furnace body is sucked into the dust extraction pipe through the dust extraction port under the action of negative pressure. Since the main pipe body is vertically arranged, the dust-containing flue gas enters the dust extraction cover and collides with the inner side of the first sealing cover and the second sealing cover at the four-way pipe joint and is turned downward to the main pipe body. Crust mainly occurs on the inner side wall of the first sealing cover and the second sealing cover. Therefore, when the crust in the pipe is cleaned periodically, the first sealing cover and the second sealing cover only need to be opened, and the accumulated crust in the cover can be removed. At the same time, after the first sealing cover and the second sealing cover are opened, the crust on the inner wall of the dust extraction cover and the inner wall of the four-way pipe joint can also be conveniently cleaned through the third interface and the fourth interface of the four-way pipe joint, which is simple to operate and saves time and effort. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only show some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without any creative effort.

[0018] Among them:

[0019] Figure 1 is a schematic diagram of the combination of the dust extraction pipe, the furnace body and the furnace cover in the non-metal electric arc furnace according to an embodiment of the present application;

[0020] Figure 2 is a schematic diagram of the three-dimensional structure of the dust extraction pipe according to an embodiment of the present application;

[0021] Figure 3 is a schematic diagram of the cross-sectional structure of the dust extraction pipe according to an embodiment of the present application;

[0022] Figure 4 is a schematic diagram of the structure of the dust extraction cover in the dust extraction pipe according to an embodiment of the present application;

[0023] Figure 5 is a schematic diagram of the three-dimensional structure of the furnace cover in the non-metal electric arc furnace according to an embodiment of the present application;

[0024] Figure 6 is a schematic diagram of the cross-sectional structure of the furnace cover in the non-metal electric arc furnace according to an embodiment of the present application;

[0025] Figure 7 is a schematic diagram of the disassembly of the furnace cover in the non-metal electric arc furnace according to an embodiment of the present application.

[0026] Main component symbol explanation:

[0027] 10, furnace body;

[0028] 20, furnace cover;

[0029] 30, dust extraction pipe; 31, dust extraction cover; 32, four-way pipe joint; 33, main pipe body; 331, pipe interface; 34, first sealing cover; 35, second sealing cover; 36, fixed support;

[0030] 100, cylinder body; 101, dust extraction port;

[0031] 200, first water cooling plate; 201, avoidance hole; 202, first water cooling cavity; 210, first water inlet pipe; 220, first water outlet pipe;

[0032] 300, second water cooling plate; 301, charging hole; 302, electrode hole; 303, second water cooling cavity;

[0033] 310, second water inlet pipe; 320, second water outlet pipe. DETAILED DESCRIPTION

[0034] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the accompanying drawings. The preferred embodiments of the present application are shown in the drawings. However, the present application can be implemented in many other different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0035] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0036] It should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0037] Moreover, the terms "first", "second", and the like, similar descriptions, are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as understood by those skilled in the art to which the present application belongs. The terms used in the specification of the present application are only for the purpose of describing the specific embodiments, and are not intended to limit the present application.

[0038] According to one aspect of the present application, the embodiments of the present application provide a dust extraction pipe suitable for a non-metal electric arc furnace, such as Figure 1 and Figure 5 As shown in the drawings, the non-metal electric arc furnace comprises a furnace body 10 and a furnace cover 20 arranged on the top of the furnace body 10, and the side of the furnace cover 20 is provided with a dust extraction port 101. In combination with Figures 1-4 As shown in the drawings, the dust extraction pipe 30 comprises a dust extraction cover 31, a four-way pipe joint 32, a main pipe body 33, a first sealing cover 34 and a second sealing cover 35. It can be understood that the four-way pipe joint 32 has four interfaces, which are respectively marked as a first interface, a second interface, a third interface and a fourth interface, and the first interface and the third interface are arranged opposite to each other in the horizontal direction, and the second interface and the fourth interface are arranged opposite to each other in the vertical direction. One end of the dust extraction cover 31 is connected with the first interface of the four-way pipe joint 32, and the other end of the dust extraction cover 31 is used for abutting against the dust extraction port 101, the main pipe body 33 is arranged vertically, the top of the main pipe body 33 is connected with the second interface of the four-way pipe joint 32, the first sealing cover 34 is arranged on the third interface of the four-way pipe joint 32, the second sealing cover 35 is arranged on the fourth interface of the four-way pipe joint 32, and a pipe interface 331 for connecting a pipeline is arranged on the lower end side wall of the main pipe body 33.

[0039] In the embodiments of the present application, when the dust extraction pipe 30 is used, one end of the dust extraction cover 31 away from the four-way pipe joint 32 is abutted against the dust extraction port 101 on the side of the furnace cover 20, and the pipe interface 331 on the lower end side wall of the main pipe body 33 is connected with a dust removal device (such as a bag-type dust collector) and an air extractor through a pipeline. In the non-metal smelting process, the dust-containing flue gas in the furnace body 10 is sucked into the dust extraction pipe 30 through the dust extraction port 101 under the action of negative pressure. Since the main pipe body 33 is arranged vertically, the dust-containing flue gas enters the dust extraction cover 31 and collides with the inner side of the first sealing cover 34 and the second sealing cover 35 at the four-way pipe joint 32 and turns downward to the main pipe body 33. Crusting mainly occurs on the inner side walls of the first sealing cover 34 and the second sealing cover 35. Therefore, when the crust in the pipe is cleaned periodically, the first sealing cover 34 and the second sealing cover 35 are only opened, and the crust accumulated in the covers is cleaned. At the same time, after the first sealing cover 34 and the second sealing cover 35 are opened, the crust on the inner wall of the dust extraction cover 31 and the inner wall of the four-way pipe joint 32 can also be conveniently cleaned through the third interface and the fourth interface of the four-way pipe joint 32. The operation is simple, time-saving and labor-saving.

[0040] In one embodiment, as shown in Figure 2 the edge of the first sealing cover 34 is hinged with the third interface, and the first sealing cover 34 can rotate relative to the hinge to open and close the third interface; the edge of the second sealing cover 35 is hinged with the fourth interface, and the second sealing cover 35 can rotate relative to the hinge to open and close the fourth interface.

[0041] In addition, the outer wall of the first sealing cover 34 and the second sealing cover 35 are each provided with a handle for exerting force when opening and closing.

[0042] It is conceivable that in other embodiments, the first sealing cover 34 and the third interface, and the second sealing cover 35 and the fourth interface can also be connected by threads.

[0043] In one embodiment, the lower end of the main pipe body 33 is provided with a slag discharge port (not shown in the figure), and a slag discharge door (not shown in the figure) is arranged on the slag discharge port for opening and closing the slag discharge port. Specifically, the slag discharge door and the slag discharge port can be connected by threads.

[0044] During use, the hard shell that falls downward when cleaning the incrustation on the inner wall of the four-way pipe joint 32 and the inner wall of the dust extraction hood 31 can be discharged outward through the slag discharge port.

[0045] In one embodiment, as shown in Figures 1-2 the dust extraction pipe 30 further comprises a fixing bracket 36 mounted on the main pipe body 33, and the fixing bracket 36 is used to be fixed on the furnace body 10, or the fixing bracket 36 is used to be fixed on the same carrier as the furnace body 10, so that the main pipe body 33 and the furnace body 10 remain relatively stationary. By this design, the dust extraction pipe 30 can move with the furnace body 10, and during the tilting process of the furnace body 10, the dust extraction pipe 30 does not separate from the dust extraction port 101, and can always extract dust, reducing dust raising and improving the environment.

[0046] According to another aspect of the present application, the embodiments of the present application also provide a non-metal electric arc furnace, as shown in Figure 1 and Figure 5 The non-metal electric arc furnace comprises the furnace body 10, the furnace cover 20 arranged on the top of the furnace body 10, and the dust extraction pipe 30 in any of the above embodiments. It can be understood that the non-metal electric arc furnace also comprises a tilting platform (not shown in the figure) for carrying the furnace body 10, a lifting electrode device (not shown in the figure) for heating, and related supporting equipment (not shown in the figure), etc., and the side of the furnace cover 20 is provided with the dust extraction port 101, and the dust extraction hood 31 on the dust extraction pipe 30 is connected to the dust extraction port 101.

[0047] Since the non-metal electric arc furnace adopts the dust extraction pipe 30 in the embodiments of the present application, it also has the advantages and benefits brought by the dust extraction pipe 30. When cleaning the crust in the dust extraction pipe 30, the operation is simple, and the normal production is ensured.

[0048] In one embodiment, as shown in Figure 1 and Figures 5-7 The furnace cover 20 includes a cylinder body 100, a first water cooling plate 200 and a second water cooling plate 300. The side of the cylinder body 100 is provided with a dust extraction port 101, the first water cooling plate 200 is arranged at the bottom of the cylinder body 100, the first water cooling plate 200 is arranged on the opening at the top of the furnace body 10, the middle part of the first water cooling plate 200 is provided with a avoiding hole 201, the inside of the first water cooling plate 200 is provided with a first water cooling cavity 202, and the side of the first water cooling plate 200 is provided with a first water inlet pipe 210 and a first water outlet pipe 220 which are in communication with the first water cooling cavity 202. The second water cooling plate 300 is arranged at the top of the cylinder body 100, and the second water cooling plate 300 is provided with a feeding hole 301 and three electrode holes 302. The projections of the feeding hole 301 and the three electrode holes 302 in the vertical direction all fall into the avoiding hole 201 on the first water cooling plate 200. The inside of the second water cooling plate 300 is provided with a second water cooling cavity 303, and the side of the second water cooling plate 300 is provided with a second water inlet pipe 310 and a second water outlet pipe 320 which are in communication with the second water cooling cavity 303.

[0049] Among them, the first water cooling plate 200 and the second water cooling plate 300 can adopt a hollow sandwich structure.

[0050] In the embodiments of the present application, the furnace cover 20 is mainly composed of the first water cooling plate 200, the second water cooling plate 300 and the cylinder body 100 connected between the first water cooling plate 200 and the second water cooling plate 300. In the working process of the non-metal electric arc furnace, cooling water is supplied to the first water cooling cavity 202 inside the first water cooling plate 200 and the second water cooling cavity 303 inside the second water cooling plate 300, so as to cool the furnace cover 20, avoid the influence of high temperature on the installation and operation of the corresponding equipment on the furnace cover 20 and the activity and operation of personnel. At the same time, before the high-temperature flue gas in the furnace body 10 is discharged outward, it will enter the water cooling space formed by the first water cooling plate 200, the second water cooling plate 300 and the cylinder body 100 through the avoiding hole 201 in the middle part of the first water cooling plate 200, and then be discharged from the dust extraction port 101 on the side of the cylinder body 100 through the dust extraction pipe 30 after being preliminarily cooled in the water cooling space. Compared with the direct discharge of high-temperature flue gas, the non-metal electric arc furnace using the furnace cover 20 does not affect the dust removal performance and service life of the subsequent bag-type dust collector.

[0051] Any technical features in the above embodiments can be combined, and for the sake of brevity, not all possible combinations are described above, however, it should be understood that any combination of the technical features is within the scope of the present disclosure.

[0052] The above embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the scope of the application. It should be pointed out that for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A dust extraction tube suitable for use in a non-metallic electric arc furnace comprising a furnace body and a furnace cover arranged on top of the furnace body, the furnace cover being provided with a dust extraction port in its side face, characterized in that, The dust extraction pipe comprises a dust extraction cover, a four-way pipe joint, a main pipe body, a first sealing cover and a second sealing cover, a first interface of the four-way pipe joint is connected with one end of the dust extraction cover, the other end of the dust extraction cover is used for abutting against the dust extraction port, the main pipe body is vertically arranged, a top of the main pipe body is connected with a second interface of the four-way pipe joint, the first sealing cover is arranged on a third interface of the four-way pipe joint, the second sealing cover is arranged on a fourth interface of the four-way pipe joint, and a pipe interface for connecting a pipeline is arranged on a lower end side wall of the main pipe body.

2. The dust extraction hose of claim 1, wherein, An edge of the first sealing cover is hinged with the third interface, the first sealing cover can rotate relative to the hinge to open and close the third interface. An edge of the second sealing cover is hinged with the fourth interface, the second sealing cover can rotate relative to the hinge to open and close the fourth interface.

3. The dust extraction hose of claim 1, wherein, A lower end of the main pipe body is provided with a slag discharge port, and a slag discharge door is arranged on the slag discharge port, and the slag discharge door is used for opening and closing the slag discharge port.

4. The dust extraction hose of claim 1, wherein, The dust extraction pipe further comprises a fixing support, the fixing support is mounted on the main pipe body, and the fixing support is used for being fixed on the furnace body or being fixed on the same carrier as the furnace body, so that the main pipe body and the furnace body remain relatively static.

5. A non-metal electric arc furnace, characterized in that, The furnace body, the furnace cover arranged on the top of the furnace body and the dust extraction pipe according to any one of claims 1-4 are comprised, a side of the furnace cover is provided with a dust extraction port, and the dust extraction cover on the dust extraction pipe is abutted against the dust extraction port.

6. The non-metal electric arc furnace according to claim 5, characterized in that, The furnace cover comprises: a cylinder body, a side of which is provided with the dust extraction port; a first water cooling plate arranged on the bottom of the cylinder body, the first water cooling plate is used for being mounted on an opening on the top of the furnace body, a middle part of the first water cooling plate is provided with a avoiding hole, an inside of the first water cooling plate is provided with a first water cooling cavity, and a side of the first water cooling plate is provided with a first water inlet pipe and a first water outlet pipe which are in communication with the first water cooling cavity; and a second water cooling plate arranged on the top of the cylinder body, the second water cooling plate is provided with a feeding hole and three electrode holes, projections of the feeding hole and the three electrode holes in the vertical direction fall into the avoiding hole on the first water cooling plate, an inside of the second water cooling plate is provided with a second water cooling cavity, and a side of the second water cooling plate is provided with a second water inlet pipe and a second water outlet pipe which are in communication with the second water cooling cavity.

7. The non-metal electric arc furnace according to claim 6, characterized in that, The first water cooling plate and the second water cooling plate are both hollow sandwich structures.

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