Feeding system

Abstract

The utility model provides a feeding system. The feeding system comprises a stock bin, a conveyor, a discharge valve and at least one flap valve, a discharge port is formed in the stock bin, one end of the conveyor is communicated with the discharge port, the other end of the conveyor is communicated with the discharge valve, an outlet and an inlet communicated with the discharge valve are formed in the flap valve, an upper flap which is opened or closed in a rotating mode is arranged at the inlet, and the discharge port is communicated with the discharge port. And a lower turning plate which is opened or closed in a rotating manner is arranged at the outlet. According to the utility model, the lower turning plate is arranged at the outlet of the turning plate valve for charging the high-temperature furnace mouth, and the valve body is opened or closed through rotation of the lower turning plate, so that closing or opening between the turning plate valve and the high-temperature furnace mouth is realized, stable charging is realized, and smoke dissipation can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of metallurgical engineering, in particular to a feeding system. Background Art

[0002] The charging port of industrial furnaces is usually a complex high-temperature environment. The temperature of the charging port of a high-oxygen-enriched side-blown furnace for nonferrous smelting can reach over 1000°C, and the flue gas at the charging port often contains SO2, Cl2, F2, CO, etc. The working environment of the charging system is harsh. In order to prevent the flue gas inside the furnace from escaping from the charging port, industrial furnaces often use a slightly negative pressure working condition to make the charging port form an air intake state. Although this method can largely prevent the escape of flue gas, it will also inhale a large amount of air, resulting in an increase in the amount of flue gas and oxidation of the elemental elements in the flue gas. It can be seen that the sealing of the charging port of industrial furnaces cannot be ignored.

[0003] The existing furnace feeding method is that the material falls onto the mobile belt conveyor on the furnace top through a quantitative feeder or a belt conveyor, and then the material is added from the mobile belt conveyor to the high-temperature furnace through the feed hopper. The feeding port is an open structure, which has the following disadvantages: (i) the feeding system is not sealed, so that the smoke in the furnace is easy to overflow and the material is easy to be oxidized; (ii) the high temperature of the furnace body is easy to cause the feeding system to wear out. Utility Model Content

[0004] The utility model aims to provide a feeding system which can realize the effective closing of a flap valve used for feeding materials to a high-temperature furnace mouth and the stable feeding.

[0005] The technical solution of the utility model is: a feeding system, including a silo, a conveyor, a discharge valve and at least one flap valve, the silo is provided with a discharge port, one end of the conveyor is connected with the discharge port, and the other end is connected with the discharge valve, the flap valve is provided with an outlet and an inlet connected with the discharge valve, the inlet is provided with an upper flap that is opened or closed in a rotating manner, and the outlet is provided with a lower flap that is opened or closed in a rotating manner.

[0006] In the above scheme, a lower flap is set at the outlet of the flap valve used to feed the high-temperature furnace mouth. The outlet of the flap valve is opened or closed by rotating the lower flap to achieve stable feeding between the flap valve and the high-temperature furnace mouth and reduce smoke escape.

[0007] Preferably, there are two flap valves, the inlet is arranged on the upper flap valve, and the outlet is arranged on the lower flap valve.

[0008] Preferably, the discharge valve is connected to the conveyor through a first transition pipe, and the discharge valve is connected to the flap valve through a second transition pipe.

[0009] Preferably, the upper flap and the lower flap both include a central axis and a flap body connected to an axial surface of the central axis; the central axis is rotatably disposed on the flap valve; a driving member for driving the central axis to rotate is disposed on an outer wall of the flap valve; the central axis rotates to place the flap body in a horizontal or vertical position; when the flap body is in a horizontal position, the flap body blocks the inlet or outlet; when the flap body is in a vertical position, the inlet or outlet is opened.

[0010] Preferably, the feeding system also includes a water inlet pipe and a water outlet pipe, the central axis is a hollow axis to form a cooling chamber, the water inlet pipe is connected to one end of the central axis, and the water outlet pipe is connected to the other end of the central axis, and the water inlet pipe and the water outlet pipe are both connected to the cooling chamber to form a circulating water channel.

[0011] Preferably, the lower end of the silo is conical, the discharge port is arranged at the bottom of the silo, and a control valve for adjusting the opening or closing of the discharge port is provided at the discharge port.

[0012] Preferably, the silo is provided with an inspection hole and a detection hole.

[0013] Preferably, two level meters are arranged in the flap valve, one of which is arranged close to the upper flap and electrically connected to the upper flap, and the other of which is arranged close to the lower flap and electrically connected to the lower flap.

[0014] Compared with the related art, the beneficial effects of the utility model are:

[0015] 1. A lower flap is provided at the outlet of the flap valve used for feeding the high-temperature furnace port, and the outlet of the flap valve is opened or closed by rotating the lower flap, so as to achieve stable feeding between the flap valve and the high-temperature furnace port and reduce smoke emission;

[0016] Second, the feeding system is provided with a silo in front of the flap valve to buffer the material, which can eliminate the problem of mismatch in the timing between the flap valve and the external feeding equipment after the flap valve is directly connected to the external feeding equipment;

[0017] 3. A material level meter is installed inside the flap valve, which can monitor the material height in the valve body, automatically control the movement of the flap, realize automatic feeding, and reduce the manual operation of the feeding port of the high-temperature furnace;

[0018] 4. The flap valve is cooled by water inside, which effectively prolongs the service life of the flap valve and is beneficial to improving the stability and operation rate of the feeding system. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the structure of the feeding system provided by the utility model;

[0020] Figure 2It is a structural schematic diagram of the flap.

[0021] In the attached drawings: 1. silo; 2. control valve; 3. conveyor; 4. first transition pipe; 5. discharge valve; 6. flap valve; 7. second transition pipe; 8. frame; 9. water inlet pipe; 10. water outlet pipe; 11. inspection hole; 12. feed port; 13. detection hole; 61. upper flap; 62. material level meter; 63. lower flap; 64. inlet; 65. outlet; 611. center axis; 612. flap body; 613. drive member. DETAILED DESCRIPTION

[0022] The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments. It should be noted that the embodiments and features in the embodiments of the present invention can be combined with each other without conflict. For the convenience of description, if the words "upper", "lower", "left" and "right" appear in the following text, they only indicate that the upper, lower, left and right directions are consistent with the drawings themselves, and do not limit the structure.

[0023] like Figure 1 As shown, a feeding system provided in this embodiment includes a silo 1, a control valve 2, a conveyor 3, a first transition pipe 4, a discharge valve 5, a flap valve 6, a second transition pipe 7, a frame 8, a water inlet pipe 9 and a water outlet pipe 10.

[0024] An inspection hole 11, a feed port 12 and a detection hole 13 are provided at the top of the silo 1. The lower end of the silo 1 is conical, and a discharge port 14 is provided at the bottom of the cone. When the silo 1 is inspected or the material is replaced, the material in the silo can be discharged through the discharge port 14. The detection hole 13 is used to monitor the material level in the silo 1. A level meter is provided inside the silo 1. When the material reaches a certain height and triggers the level meter, the discharge port 14 is opened to allow the material to fall onto the conveyor 3, and the feed port 12 is closed at the same time. In this way, the material level in the silo 1 is automatically monitored and the feeding is automatically controlled. A control valve 2 is provided at the discharge port 14. The control valve 2 is a pneumatic control valve that can open or close the discharge port 14.

[0025] One end of the conveyor 3 is connected to the discharge port 14, and the other end is connected to the first transition pipe 4. The conveyor 3 is a screw conveyor, which can ensure the sealing of the conveying process and reduce the spillage of smoke and material oxidation during the conveying process. From the first transition pipe 4 downward, the discharge valve 5, the second transition pipe 7 and the inlet 64 of the flap valve 6 are connected in sequence. The connection interfaces of the above-mentioned parts need to be sealed by sealing members (such as sealing rings), and the above-mentioned parts are detachably connected. By replacing the first transition pipe 4 and the second transition pipe 7 of different lengths, the height position of the outlet 65 can be adjusted to connect it to the high-temperature furnace body.

[0026] The flap valve 6 is fixed to the corresponding wall or beam around the equipment through the frame 8. There can be one or more flap valves 6. When there are multiple flap valves 6, they are connected in sequence from top to bottom, and the flap valves 6 at both ends are respectively provided with an inlet 64 and an outlet 65. In this embodiment, there are two flap valves 6, the inlet 64 is provided on the flap valve 6 at the upper end, and the outlet 65 is provided on the flap valve 6 at the lower end. The inlet 64 is provided with an upper flap 61 that is opened or closed in a rotating manner, and the outlet 65 is provided with a lower flap 63 that is opened or closed in a rotating manner.

[0027] like Figure 2 As shown, the upper flap 61 and the lower flap 63 have the same structure, and both include a central shaft 611 and a flap body 612 connected to the axial surface of the central shaft 611. The central shaft 611 is rotatably arranged on the flap valve 6, and a driving member 613 for driving the central shaft 611 to rotate is arranged on the outer wall of the flap valve 6. The driving member 613 is a cylinder, which is telescopic to drive the central shaft 611 to rotate, so that the flap body 612 is placed in a horizontal (closed valve body) or vertical (opened valve body) position.

[0028] The central shaft 611 is a hollow shaft to form a cooling cavity. The water inlet pipe 9 is connected to one end of the central shaft 611, and the water outlet pipe 10 is connected to the other end of the central shaft 611. The water inlet pipe 9 and the water outlet pipe 10 are both connected to the cooling cavity to form a circulating water channel.

[0029] A material storage cavity is formed in the flap valve 6 , and a material level meter 62 is arranged in each of the two material storage cavities. One of the material level meters 62 is arranged close to the upper flap 61 and electrically connected to the upper flap 61 , and the other material level meter 62 is arranged close to the lower flap 63 and electrically connected to the lower flap 63 .

[0030] When the lower flap 63 is closed and the upper flap 61 is opened, the feeding system is isolated from the high-temperature furnace through the lower flap 63, and the material enters the storage chamber of the flap valve 6 through the conveyor 3 under the regulation of the control valve 2. When the upper flap 61 is closed and the lower flap 63 is opened, the feeding system is isolated from the silo 1 by closing the upper flap 61, and the material in the storage chamber enters the furnace from the outlet 65 under the action of gravity, thereby completing one feeding. The outlet 65 is the discharge port of the entire feeding system, and a flange is provided to seal and connect with the feed port of the furnace.

[0031] The silo 1 is used to directly receive and store materials from the mixer. The outlet 65 is airtightly connected to the high-temperature kiln. During operation, materials such as pulverized coal, lead slag, alkali slag, lead mud, limestone, etc. enter the silo 1 from the feed port 12 via a quantitative feeder or a belt conveyor (not shown) to achieve feeding. During feeding, the lower flap 63 of the outlet 65 is in a closed state, the control valve 2 is opened, and the material is transported by the conveyor 3. When it reaches the discharge valve 5, the discharge valve 5 and the upper flap 61 are opened, and the material enters the storage chamber of the flap valve 6 from the inlet 64. When the material reaches the set value of the level meter 62, the level meter 62 is triggered, the upper flap 61 is closed, and the lower flap 63 is opened to achieve unloading. The material enters the kiln from the outlet 65, and the upper flap 61 is closed at this time.

[0032] The upper flap 61 and the lower flap 63 can realize the closing or opening of the inlet 64 and the outlet 65 of the flap valve 6, and a circulating water channel is provided inside so that circulating water cooling can be performed in the flap valve 6. The cooling water flows from the bottom to the top, forming convection cooling, effectively extending the service life of the flap valve 6, and is conducive to improving the stability and operation rate of the feeding system.

[0033] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A feeding system, comprising a silo (1) and a conveyor (3), wherein the silo (1) is provided with a discharge port (14), characterized in that: The conveyor (3) further comprises a discharge valve (5) and at least one flap valve (6); one end of the conveyor (3) is in communication with the discharge port (14), and the other end is in communication with the discharge valve (5); the flap valve (6) is provided with an outlet (65) and an inlet (64) in communication with the discharge valve (5); the inlet (64) is provided with an upper flap (61) that can be opened or closed in a rotating manner; and the outlet (65) is provided with a lower flap (63) that can be opened or closed in a rotating manner.

2. The feeding system according to claim 1, characterized in that: There are two flap valves (6), the inlet (64) is arranged on the upper flap valve (6), and the outlet (65) is arranged on the lower flap valve (6).

3. The feeding system according to claim 1, characterized in that: The discharge valve (5) is connected to the conveyor (3) via a first transition pipe (4), and the discharge valve (5) is connected to the flap valve (6) via a second transition pipe (7).

4. The feeding system according to claim 1, characterized in that: The upper flap (61) and the lower flap (63) both comprise a central axis (611) and a flap body (612) connected to an axial surface of the central axis (611); the central axis (611) is rotatably arranged on the flap valve (6); a driving member (613) for driving the central axis (611) to rotate is arranged on an outer wall of the flap valve (6); the central axis (611) rotates to place the flap body (612) in a horizontal or vertical position; when the flap body (612) is in a horizontal position, the flap body (612) blocks the inlet (64) or outlet (65); when the flap body (612) is in a vertical position, the inlet (64) or outlet (65) is opened.

5. The feeding system according to claim 4, characterized in that: It also includes a water inlet pipe (9) and a water outlet pipe (10), the central axis (611) is a hollow axis to form a cooling cavity, the water inlet pipe (9) is connected to one end of the central axis (611), the water outlet pipe (10) is connected to the other end of the central axis (611), and the water inlet pipe (9) and the water outlet pipe (10) are both connected to the cooling cavity to form a circulating water channel.

6. The feeding system according to claim 1, characterized in that: The lower end of the silo (1) is conical, the discharge port (14) is arranged at the bottom of the silo (1), and a control valve (2) for adjusting the opening or closing of the discharge port (14) is arranged at the discharge port (14).

7. The feeding system according to claim 1, characterized in that: The silo (1) is provided with an inspection hole (11) and a detection hole (13).

8. The feeding system according to claim 1, characterized in that: Two material level meters (62) are arranged in the flap valve (6), one of the material level meters (62) is arranged close to the upper flap (61) and is electrically connected to the upper flap (61), and the other of the material level meters (62) is arranged close to the lower flap (63) and is electrically connected to the lower flap (63).

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