A closed water-cooled dust collecting tank for a DC electric furnace

Abstract

The utility model relates to the technical field of smoke pipe equipment, specifically a closed water-cooled dust collecting tank for a direct current electric furnace, comprising a tank body, the tank body is funnel-shaped, a smoke pipe is installed on the top of the tank body, a manhole is provided on the outer wall of the tank body, an ash unloading hole is provided at the bottom of the tank body, a nitrogen interface is provided on the edge of the ash unloading hole, a circulating water interface is installed on the top of the outer wall of the tank body, and a semi-ball valve is installed in the circulating water interface. The utility model has simple ash unloading operation, short ash unloading time, and avoids the clogging of the smoke pipe by dust generated by the electric furnace production, which greatly increases the operation efficiency and safety of the electric furnace. By installing a circulating water interface on the top of the outer wall of the tank body, and installing a semi-ball valve in the circulating water interface, the flow of water can be controlled by the semi-ball valve during use, providing a continuous cooling effect for the tank body, and preventing it from being damaged due to excessive temperature. At the same time, the circulating water can take away part of the heat to reduce the temperature of the electric furnace and the surrounding environment.

Description

Technical Field

[0001] The utility model relates to the technical field of smoke pipe equipment, in particular to a closed water-cooled dust collecting tank for a direct current electric furnace. Background Art

[0002] The water-cooled ash tank equipment is installed on the 18-meter platform of the electric furnace steel structure frame, with a span of 6 meters and a maximum of 6 meters. Water cooling is installed on the 24-meter, 29-meter, and 37-meter smoke pipes to strengthen smoke pipe cooling and remove the 18-meter water-cooled herringbone smoke pipe. The original 18-meter V-shaped smoke pipe of the electric furnace often has ash blockage, which leads to increased pressure in the electric furnace and poses a safety hazard.

[0003] The water-cooled ash tank is welded with steel structure, with a diameter of 3800mm, a length of 6500mm, a weight of 11.2 tons, an outlet smoke pipe diameter of 1150mm, an inlet smoke pipe diameter of 1200mm, a water-cooled ash tank pressure of 0.6MPa, and a working pressure of 0.4MPa. The cooling water is supplied by the furnace wall cooling water system, and no separate water supply pump is added. Utility Model Content

[0004] The utility model aims to provide a closed water-cooled dust collecting tank for a DC electric furnace, so as to solve the problem in the above-mentioned background technology that V-shaped smoke pipes are often blocked by ash, resulting in increased pressure in the electric furnace and potential safety hazards.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A closed water-cooled dust collecting tank for a direct current electric furnace comprises a tank body, which is funnel-shaped, a smoke pipe is installed on the top of the tank body, a manhole is opened on the outer wall of the tank body, an ash discharge hole is opened at the bottom of the tank body, a nitrogen interface is arranged at the edge of the ash discharge hole, a circulating water interface is installed on the top of the outer wall of the tank body, and a semi-ball valve is installed in the circulating water interface.

[0007] Preferably, the tank body is installed at 12-18 meters of the electric furnace.

[0008] Preferably, a fixing device is installed on the outer wall of the tank body.

[0009] Preferably, the fixing device is a fixed leg or a fixed support.

[0010] Preferably, the hemispherical valve comprises a valve body, a valve seat, a ball installed in the valve body, and a pneumatic seat installed on the top of the valve body.

[0011] Preferably, a lower shaft is installed at the bottom of the valve body, and a valve stem is installed at the top of the valve body. The valve stem passes through the valve body and is connected to the ball.

[0012] Preferably, a gasket and a pressure plate ring are installed on the edge of the valve body close to the opening.

[0013] Preferably, a packing area is provided between the top of the valve body and the bottom of the pneumatic seat.

[0014] Preferably, a packing gland is provided on the packing area, and the packing gland is connected to the valve body via fixing bolts.

[0015] Compared with the prior art, the utility model has the following beneficial effects: the ash unloading operation of the closed water-cooled dust collecting tank of the DC electric furnace is simple, the ash unloading time is short, and the dust generated by the electric furnace production is prevented from clogging the smoke pipe, which greatly increases the operation efficiency and safety of the electric furnace. A circulating water interface is installed on the top of the outer wall of the tank body, and a semi-ball valve is installed in the circulating water interface. The flow of water can be controlled by the semi-ball valve during use, providing a continuous cooling effect for the tank body to prevent it from being damaged due to excessive temperature. At the same time, the circulating water can take away part of the heat to reduce the temperature of the electric furnace and the surrounding environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, further detailed explanation is provided, but the accompanying drawings do not constitute a limitation to the present invention.

[0017] Figure 1 This is a schematic diagram of the structure of the utility model in which the water-cooled ash tank is installed 18 meters away from the electric furnace;

[0018] Figure 2 This is a structural schematic diagram of the utility model in which the small ash tank is installed 12 meters away from the electric furnace;

[0019] Figure 3 It is a schematic cross-sectional view of the hemispherical valve of the utility model.

[0020] The meaning of the symbols in the figure:

[0021] 1. Smoke pipe; 2. Manhole; 3. Nitrogen interface; 4. Ash discharge hole; 5. Fixing device; 6. Circulating water interface; 7. Hemispherical valve; 71. Lower shaft; 72. Valve body; 73. Hexagon socket bolt; 74. Valve seat; 75. Ball; 76. Gasket; 77. Pressure plate ring; 78. Valve stem; 79. Packing area; 710. Packing gland; 711. Fixing bolt; 712. Pneumatic seat; 8. Tank body. DETAILED DESCRIPTION

[0022] The following will combine the embodiments of the utility model and the drawings of the specification 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 of 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.

[0023] In the description of the present invention, it should be understood that the terms "center", "vertical", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicating orientations or positional relationships are 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 referred device or element 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] Example 1

[0025] A closed water-cooled dust collecting tank for a DC electric furnace, such as Figure 1 As shown, in this embodiment, the water-cooled ash tank is installed at 18 meters of the electric furnace, including a tank body 8, the tank body 8 is funnel-shaped, a smoke pipe 1 is installed on the top of the tank body 8, a manhole 2 is opened on the outer wall of the tank body 8, an ash unloading hole 4 is opened at the bottom of the tank body 8, a nitrogen interface 3 is set at the edge of the ash unloading hole 4, a circulating water interface 6 is installed on the top of the outer wall of the tank body 8, and a semi-ball valve 7 is installed in the circulating water interface 6.

[0026] In this embodiment, fixed legs are installed on the outer wall of the tank body 8 to increase stability.

[0027] Further, such as Figure 3 As shown, the semi-ball valve 7 includes a valve body 72, a valve seat 74, a ball 75 installed in the valve body 72, and a pneumatic seat 712 installed on the top of the valve body 72. A lower shaft 71 is installed at the bottom of the valve body 72, and a valve stem 78 is installed on the top of the valve body 72. The valve stem 78 passes through the valve body 72 and is connected to the ball 75, so that the semi-ball valve has better sealing performance and longer service life.

[0028] Specifically, a gasket 76 and a pressure plate ring 77 are installed on the edge of the valve body 72 close to the opening.

[0029] A packing area 79 is provided between the top of the valve body 72 and the bottom of the pneumatic seat 712 .

[0030] In addition, a packing gland 710 is provided on the packing area 79 , and the packing gland 710 is connected to the valve body 72 via fixing bolts 711 .

[0031] Example 2

[0032] A closed water-cooled dust collecting tank for a DC electric furnace, such as Figure 2 As shown, in this embodiment, the small ash tank is installed at 12 meters of the electric furnace, including a tank body 8, the tank body 8 is funnel-shaped, a smoke pipe 1 is installed on the top of the tank body 8, a manhole 2 is opened on the outer wall of the tank body 8, an ash unloading hole 4 is opened at the bottom of the tank body 8, a nitrogen interface 3 is set at the edge of the ash unloading hole 4, a circulating water interface 6 is installed on the top of the outer wall of the tank body 8, and a semi-ball valve 7 is installed in the circulating water interface 6.

[0033] In this embodiment, a fixed support is installed on the outer wall of the tank body 8.

[0034] Further, such as Figure 3 As shown, the semi-ball valve 7 includes a valve body 72, a valve seat 74, a ball 75 installed in the valve body 72, and a pneumatic seat 712 installed on the top of the valve body 72. A lower shaft 71 is installed at the bottom of the valve body 72, and a valve stem 78 is installed on the top of the valve body 72. The valve stem 78 passes through the valve body 72 and is connected to the ball 75.

[0035] Specifically, a gasket 76 and a pressure plate ring 77 are installed on the edge of the valve body 72 close to the opening.

[0036] A packing area 79 is provided between the top of the valve body 72 and the bottom of the pneumatic seat 712 .

[0037] In addition, a packing gland 710 is provided on the packing area 79 , and the packing gland 710 is connected to the valve body 72 via fixing bolts 711 .

[0038] Beneficial effects of the closed water-cooled dust collecting tank of the DC electric furnace in the above two embodiments:

[0039] Water cooling protection: By installing a water cooling ash tank 18 meters away from the electric furnace, the heat generated by the electric furnace can be effectively absorbed to protect the equipment from high temperature, while reducing the operating environment temperature and improving operating conditions.

[0040] ·Easy to clean: The tank body 8 is funnel-shaped, which is conducive to collecting and dumping smoke. In addition, the edge of the ash discharge hole 4 set at the bottom is equipped with a nitrogen interface 3, which can provide nitrogen when dumping ashes to prevent air from entering and keep the tank in a closed state, which can effectively prevent dust and smoke from leaking out and ensure smooth operation.

[0041] ·Circulating water system: A circulating water interface 6 is installed on the top of the outer wall of the tank body 8, and a semi-ball valve 7 is installed in the circulating water interface 6. This design can control the water flow through the semi-ball valve 7 during use, provide a continuous cooling effect for the tank body 8, and prevent it from being damaged due to excessive temperature. At the same time, the circulating water can take away some heat and reduce the temperature of the electric furnace and the surrounding environment.

[0042] Safety protection: By opening a manhole 2 on the outer wall of the tank body 8, the operator can observe the situation inside the tank through the manhole 2 and perform necessary operations, such as cleaning and maintenance. At the same time, the manhole 2 can also be used as an emergency passage to facilitate personnel to enter and exit when necessary.

[0043] Environmental protection and energy saving: This product can reduce heat loss through water cooling while collecting and processing smoke, thereby reducing energy consumption and the impact on the environment.

[0044] In addition, the semi-ball valve 7 in the utility model may be a star-shaped discharge valve.

[0045] The working principle of the closed water-cooled dust collecting tank of the DC electric furnace of the utility model: when in use, the closed water-cooled dust collecting tank is installed at 12 or 18 meters of the electric furnace to receive the exhaust gas discharged from the electric furnace. The tank body 8 is funnel-shaped, and a smoke pipe 1 is installed on the top to guide the exhaust gas into the tank body. A manhole 2 is opened on the outer wall of the tank body 8 to facilitate personnel to enter the tank body for maintenance and cleaning. An ash discharge hole 4 is opened at the bottom of the tank body 8, and a nitrogen interface 3 is arranged along the edge of the ash discharge hole 4. When it is necessary to discharge waste slag, nitrogen can be introduced into the tank body through the nitrogen interface 3 to help discharge the waste slag. A circulating water interface 6 is installed on the top of the outer wall of the tank body 8, and a semi-ball valve 7 is installed in the circulating water interface 6. The circulating water can flow through the tank body to help cool and purify the exhaust gas, and the semi-ball valve 7 can control the flow rate of the circulating water. By controlling the flow rate of the circulating water by the semi-ball valve 7, the temperature inside the tank body can be kept within a suitable range to prevent the exhaust gas temperature from being too high, causing scaling or deformation inside the tank body. The cooled and purified waste gas is discharged through the smoke pipe 1, and the collected waste residue can be discharged through the ash discharge hole 4 and the nitrogen interface 3. The coordinated use of circulating water and the semi-ball valve 7 can effectively improve the purification effect of the waste gas and extend the service life of the tank.

[0046] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A closed water-cooled dust collecting tank for a DC electric furnace, comprising a tank body (8), characterized in that: The tank body (8) is funnel-shaped, a smoke pipe (1) is installed on the top of the tank body (8), a manhole (2) is provided on the outer wall of the tank body (8), an ash discharge hole (4) is provided on the bottom of the tank body (8), a nitrogen interface (3) is provided on the edge of the ash discharge hole (4), a circulating water interface (6) is installed on the top of the outer wall of the tank body (8), and a semi-ball valve (7) is installed in the circulating water interface (6).

2. The closed water-cooled dust collecting tank for a DC electric furnace according to claim 1, characterized in that: The tank body (8) is installed at 12-18 meters of the electric furnace.

3. The closed water-cooled dust collecting tank for a DC electric furnace according to claim 1, characterized in that: A fixing device (5) is installed on the outer wall of the tank body (8).

4. The closed water-cooled dust collecting tank for a DC electric furnace according to claim 3, characterized in that: The fixing device (5) is a fixing leg or a fixing support.

5. The closed water-cooled dust collecting tank for a DC electric furnace according to claim 1, characterized in that: The semi-ball valve (7) comprises a valve body (72), a valve seat (74), a ball (75) installed in the valve body (72), and a pneumatic seat (712) installed on the top of the valve body (72).

6. The closed water-cooled dust collecting tank for a DC electric furnace according to claim 5, characterized in that: A lower shaft (71) is installed at the bottom of the valve body (72), and a valve stem (78) is installed at the top of the valve body (72). The valve stem (78) passes through the valve body (72) and is connected to the ball (75).

7. The closed water-cooled dust collecting tank for a DC electric furnace according to claim 5, characterized in that: A gasket (76) and a pressure plate ring (77) are installed on the edge of the valve body (72) close to the opening.

8. The closed water-cooled dust collecting tank for a DC electric furnace according to claim 5, characterized in that: A packing area (79) is provided between the top of the valve body (72) and the bottom of the pneumatic seat (712).

9. The closed water-cooled dust collecting tank for a DC electric furnace according to claim 8, characterized in that: A packing gland (710) is provided on the packing area (79), and the packing gland (710) is connected to the valve body (72) via fixing bolts (711).

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