Discharging blocking device for fluidized bed roaster

Abstract

The utility model relates to the technical field of fluidized bed roamers, in particular to a discharging blocking device for a fluidized bed roaster, which comprises a flashboard and a fixing mechanism, the flashboard is placed at an overflow port of the fluidized bed roaster and seals the overflow port, and the fixing mechanism comprises a first fixing seat and a second fixing seat. The first fixing seat is arranged on the outer wall of the fluidized bed roaster and located on the side of the overflow port, the second fixing seat is arranged on the gate plate and corresponds to the first fixing seat, a movable column is movably arranged on the second fixing seat, and the movable column is detachably connected with the first fixing seat. The blocking and discharging device for the fluidized bed roaster is simple in structure, convenient to take and use and capable of blocking the overflow port, and when a certain device in a roasted product conveying system breaks down, the working requirement that the roaster does not stop working is met.

Description

Technical Field

[0001] The utility model relates to the technical field of fluidized bed roasting furnaces, in particular to a blocking and discharging device for fluidized bed roasting furnaces. Background Art

[0002] The conventional hydrometallurgical zinc smelting industry uses a fluidized bed roaster to process zinc concentrate to produce zinc roasted sand. After zinc concentrate enters the roaster through the discharge port, it fluidizes and boils within the roaster, fully reacting to produce zinc roasted sand, which is then discharged through the overflow port. The zinc roasted sand is discharged from the overflow port at a temperature of approximately 900°C. It is then cooled to 100°C by a fluidized bed cooler and cooling drum, and then transported to a ball mill via a buried scraper device for milling. The milled zinc roasted sand is then transported to the hydrometallurgical system via a gasification jet pump.

[0003] Currently, conventional roasted sand conveying systems for hydrometallurgical zinc smelting are single-line equipment with a conveying capacity of 30 tons per hour, requiring continuous and stable operation. When equipment such as the fluidized bed cooler, cooling drum, buried scraper device, and ball mill in the roasted sand conveying system malfunctions and requires shutdown for maintenance, the zinc roasted sand discharged from the roaster's overflow port cannot be effectively handled. Consequently, the roaster is forced to shut down for a short period of time, requiring only a short-term restart after the malfunction is resolved. This costly shutdown and restart process also poses a risk of sintering within the furnace.

[0004] Therefore, there is an urgent need for a blocking and discharging device for a fluidized bed roasting furnace to solve the above problems. Utility Model Content

[0005] In order to solve the technical problem that the roasting furnace can only be forced to shut down for a short period of time when a certain device in the roasting sand conveying system fails, the utility model provides a blocking discharge device for a boiling roasting furnace. The device has a simple structure, is easy to use, and can block the overflow port. When a certain device in the roasting sand conveying system fails, it meets the working requirement of the roasting furnace without stopping.

[0006] The utility model provides a blocking and discharging device for a fluidized bed roasting furnace, comprising a gate plate and a fixing mechanism, wherein the gate plate is placed at the overflow port of the fluidized bed roasting furnace and seals the overflow port, and the fixing mechanism comprises a first fixing seat and a second fixing seat, wherein the first fixing seat is arranged on the outer wall of the fluidized bed roasting furnace and is located on the side of the overflow port, the second fixing seat is arranged on the gate plate and corresponds to the first fixing seat, and a movable column is movably arranged on the second fixing seat, and the movable column is detachably connected to the first fixing seat. When the gate plate is placed at the overflow port of the fluidized bed roasting furnace and the gate plate seals the overflow port, the movable column on the second fixing seat is fixedly connected to the first fixing seat again, and at this time, the second fixing seat is fixedly connected to the first fixing seat, thereby achieving a tight fit between the gate plate and the fluidized bed roasting furnace, and the gate plate thereby blocks the overflow port, effectively preventing zinc roasted sand from being discharged from the overflow port.

[0007] Furthermore, a through hole is provided on the second fixed seat, one end of the movable column passes through the through hole and is provided with a limit block, the other end of the movable column is provided with a suction cup, and a smooth plate is provided at a position corresponding to the suction cup of the first fixed seat, and the suction cup is fixedly connected to the smooth plate.

[0008] Furthermore, a return spring is wound around the movable column, and the end of the return spring is fixedly connected to the inner wall of the through hole. The return spring keeps the movable column stable on the second fixing seat when not in use.

[0009] Furthermore, the second fixing seat is provided with a first pin hole that communicates with the through hole, and the movable column is provided with a second pin hole. A pin shaft is fixedly connected to the first pin hole and the second pin hole. When the pin shaft is fixed in the first pin hole and the second pin hole, the movable column remains fixed; when the pin shaft is removed from the first pin hole and the second pin hole, the movable column can move.

[0010] Furthermore, the first fixing seat is provided with a fixing post, and the second fixing seat is provided with a fixing hole at a position corresponding to the fixing post, through which the fixing post passes. When the first fixing seat and the second fixing seat are fixedly connected, the fixing post passes through the fixing hole, and the cooperation between the fixing post and the fixing hole further secures the first fixing seat and the second fixing seat, thereby securing and sealing the gate at the overflow port.

[0011] Furthermore, a fixed plate is rotatably mounted on the outer wall of the fluidized bed roaster. The fixed plate is located on a side of the first fixed seat away from the overflow port. The gate plate is provided with a slot located on the side of the gate plate away from the overflow port, and the end of the fixed plate is snapped into the slot. After the gate plate is fixed and sealed to the overflow port, the fixed plate is manually rotated, and the end of the fixed plate snaps into the slot. The cooperation between the slot and the fixed plate further ensures a tight fit between the gate plate and the fluidized bed roaster.

[0012] Furthermore, a handle is provided on the gate plate 1 and is located on the side of the gate plate 1 away from the overflow port, and a plurality of reinforcing ribs are fixedly connected between the gate plate and the handle. The handle facilitates the movement of the gate plate so as to fix the gate plate at the overflow port of the fluidized bed roaster.

[0013] Furthermore, a sealing gasket is provided on the end surface of the gate plate in contact with the overflow port, which further ensures that the gate plate seals the overflow port and prevents the zinc roasted sand from being discharged from the overflow port.

[0014] Compared with the prior art, the present invention has the following technical effects:

[0015] When the gate is placed at the overflow port of the fluidized bed roaster and the gate seals the overflow port, the movable column on the second fixing seat is fixedly connected to the first fixing seat. At this time, the second fixing seat and the first fixing seat are fixedly connected, thereby achieving a tight fit between the gate and the fluidized bed roaster. The gate thus blocks the overflow port, effectively preventing the zinc roasted sand from being discharged from the overflow port. The blocking and discharge device of the utility model has a simple structure and is easy to use. It can block the overflow port and meet the operating requirements of the roaster without stopping when a device in the roasted sand conveying system fails. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural schematic diagram of a blocking and discharging device for a fluidized bed roasting furnace according to the present invention;

[0017] Figure 2 This utility model Figure 1 A schematic diagram of the structure of the middle part;

[0018] Figure 3 This is a side structural diagram of the blocking and discharging device of the utility model;

[0019] Figure 4 It is a structural schematic diagram of the fixing plate of the utility model;

[0020] The reference numerals in the accompanying drawings are:

[0021] 1. Gate; 11. Handle; 12. Reinforcement rib; 13. Slot; 14. Sealing gasket;

[0022] 2. First fixing seat; 21. Smooth plate; 22. Fixing column;

[0023] 3. Second fixed seat; 31. Movable column; 32. Limit block; 33. Suction cup; 34. Return spring;

[0024] 4. Fixed plate;

[0025] 5. Boiling roaster. DETAILED DESCRIPTION

[0026] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0027] like Figures 1 to 4As shown, a blocking discharge device for a fluidized bed roasting furnace includes a gate 1 and a fixing mechanism. The gate 1 is placed at the overflow port of the fluidized bed roasting furnace 5 and seals the overflow port. Generally, the fluidized bed roasting furnace 5 is provided with a furnace, and a bayonet is provided at the overflow port of the furnace of the fluidized bed roasting furnace 5. The gate 1 can seal the overflow port after being placed on the bayonet. The fixing mechanism includes a first fixing seat 2 and a second fixing seat 3. The first fixing seat 2 is provided on the outer wall of the fluidized bed roasting furnace 5 and is located on the side of the overflow port. The second fixing seat 3 is provided on the gate 1 and corresponds to the first fixing seat 2. A movable column 31 is movably provided on the second fixing seat 3. The movable column 31 is detachably connected to the first fixing seat 2. The gate 1 has a thickness of 1 cm, a length of 50 cm, and a width of 40 cm. The gate 1 is made of high-temperature resistant steel plate. Generally, the size of the gate 1 is designed to be exactly the same as or slightly larger than the size of the overflow port.

[0028] When the gate plate 1 is placed at the overflow port of the boiling roasting furnace 5 and the gate plate 1 seals the overflow port, the movable column 31 on the second fixed seat 3 is fixedly connected to the first fixed seat 2. At this time, the second fixed seat 3 and the first fixed seat 2 are fixedly connected, thereby achieving a close fit between the gate plate 1 and the boiling roasting furnace 5. The gate plate 1 thereby blocks the overflow port, effectively preventing zinc roasted sand from being discharged from the overflow port.

[0029] The blocking and discharging device of this embodiment has a simple structure and is easy to use. It can block the overflow port and meet the working requirement of the roasting furnace without stopping when a device in the roasted sand conveying system fails.

[0030] In this embodiment, the fluidized bed roaster 5 is a 109 m2 Lurgi-type roaster. The roaster hearth area is 109 m2, the boiling height of the zinc concentrate in the furnace is approximately 1 m, and the overflow outlet is also approximately 1 m high. The overflow outlet is 50 cm long and 40 cm wide, with a 10 cm wide platform reserved at the bottom of the overflow outlet. The spontaneous combustion of the zinc concentrate in the furnace generates a large amount of heat. To ensure the fluidized roasting of the zinc concentrate and the quality of the roasted sand, the furnace temperature is stabilized between 900°C and 960°C. That is, the zinc roasted sand is approximately 900°C when it is discharged from the overflow outlet. The zinc roasted sand is then cooled to 100°C by a fluidized bed cooler, cooling drum, and other devices. It is then transported to a ball mill via an embedded scraper device for ball milling. The milled zinc roasted sand is then transported to the wet process system via a gasification jet pump for use.

[0031] When a device in the roasted sand conveying system fails, the fluidized bed roaster can provide 1-3 hours of equipment maintenance time for the roasted sand conveying system without stopping the furnace by blocking the discharge device, and resume normal production after the equipment is repaired. Specific steps:

[0032] 1. During the normal production process of the fluidized bed roaster 5, the fluidized bed roaster 5 stabilizes the roasting air volume, roasting furnace temperature, and bellows pressure, adjusts the material quantity, and maintains normal production;

[0033] 2. When a device in the roasted sand conveying system fails, the equipment management personnel shall determine the equipment maintenance time. If the maintenance time is within 3 hours, the overflow port shall be blocked using the blocking discharge device. If the maintenance time exceeds 3 hours, the boiling roasting furnace 5 shall be temporarily shut down.

[0034] 3. After confirming that the maintenance time is within 3 hours, the boiling roasting furnace 5 shall reduce the air flow and reduce the material on the premise of ensuring that the material in the furnace is in a boiling state and the furnace temperature is not lower than 800℃ to reduce the boiling height of the material in the furnace. The air volume, material quantity and maintenance time of the boiling roasting furnace 5 are as follows:

[0035]

[0036] 4. While the fluidized bed roasting furnace 5 is reducing air and material, the operator places a blocking and discharging device for the fluidized bed roasting furnace at the overflow port of the fluidized bed roasting furnace 5 to ensure that there is no overflow of material in the furnace;

[0037] 5. After confirming that there is no material overflow at the overflow port of the boiling roasting furnace 5, a device in the calcined sand conveying system is repaired within the planned time, and after the equipment maintenance is completed, the boiling roasting furnace 5 is notified to start discharging;

[0038] 6. After receiving the notice of discharge after equipment maintenance is completed, the boiling roasting furnace 5 stabilizes the air volume and the feeding amount remains unchanged. The operator slowly removes the blocking discharge device at the overflow port, and the overflow port starts discharging. During the discharge process, continuous attention is paid to the discharge temperature and discharge volume to ensure that the fluidization temperature is within the process control range and the load of the buried scraper device meets the requirements. In the event of overload, the removal of the blocking discharge device of the boiling roasting furnace 5 needs to be temporarily suspended;

[0039] 7. After the blocked discharge device is completely lifted and moved out of the overflow port, and the discharge temperature and material quantity meet the process requirements, the boiling roasting furnace 5 begins to slowly add air and material to increase the furnace temperature and resume normal production.

[0040] As an implementable embodiment, a through hole is provided on the second fixed seat 3, one end of the movable column 31 passes through the through hole and is provided with a limit block 32, the other end of the movable column 31 is provided with a suction cup 33, and a smooth plate 21 is provided at a position corresponding to the suction cup 33 of the first fixed seat 2, and the suction cup 33 is fixedly connected to the smooth plate 21. After the gate plate 1 is placed at the overflow port of the boiling roasting furnace 5 and the gate plate 1 seals the overflow port, a person pushes the movable column 31 to move through the limit block 32, and makes the suction cup 33 on the movable column 31 suck the smooth plate 21, and the second fixed seat 3 and the first fixed seat 2 are fixedly connected. When the gate plate 1 needs to be removed, the person again pulls the movable column 31 in the opposite direction through the limit block 32, and makes the suction cup 33 on the movable column 31 leave the smooth plate 21, and the second fixed seat 3 and the first fixed seat 2 are disconnected.

[0041] Furthermore, the suction cup 33 can be a vacuum suction cup, which is connected to a cylinder, and the cylinder controls the placement and removal of the vacuum suction cup.

[0042] In one embodiment, a return spring 34 is wound around the movable column 31, with the end of the return spring 34 fixedly connected to the inner wall of the through hole. The return spring 34 stabilizes the movable column 31 on the second fixing base 3 when not in use. Furthermore, when the stop block 32 is released, the elastic force of the return spring 34 drives the movable column 31 back to its initial position, facilitating the suction cup 33 to quickly engage the smooth plate 21 the next time.

[0043] In one embodiment, the second fixing seat 3 is provided with a first pin hole that communicates with the through hole, and the movable column 31 is provided with a second pin hole. A pin is fixedly connected to the first and second pin holes. When the pin is fixed in the first and second pin holes, the movable column 31 remains stationary; when the pin is removed from the first and second pin holes, the movable column 31 can move.

[0044] As an embodiment, the first fixing seat 2 is provided with a fixing post 22, and the second fixing seat 3 is provided with a fixing hole at a position corresponding to the fixing post 22, through which the fixing post 22 passes. When the first fixing seat 2 and the first fixing seat 2 are fixedly connected, the fixing post 22 passes through the fixing hole, and the cooperation between the fixing post 22 and the fixing hole further secures the first fixing seat 2 and the first fixing seat 2, thereby securing and sealing the gate plate 1 at the overflow port.

[0045] As an implementable embodiment, a fixed plate 4 is rotatably provided on the outer wall of the boiling roasting furnace 5, and a shaft is provided on the fixed plate 4. The shaft on the fixed plate 4 is rotated by a bearing in a bearing seat provided on the outer wall of the boiling roasting furnace 5. On the outer wall of the boiling roasting furnace 5, two fixed plates 4 are provided and the two fixed plates 4 are opposite to each other. The fixed plates 4 are located on the side of the first fixed seat 2 away from the overflow port. A card slot 13 is provided on the gate plate 1 and the card slot 13 is located on the side of the gate plate 1 away from the overflow port, and the end of the fixed plate 4 is snapped into the card slot 13. After the gate plate 1 is fixed and sealed at the overflow port, the two fixed plates 4 are manually rotated, and the ends of the two fixed plates 4 are snapped into the card slot 13 (that is, the fixed plate 4 presses the gate plate 1). The cooperation of the card slot 13 and the two fixed plates 4 further makes the gate plate 1 and the boiling roasting furnace 5 fit tightly.

[0046] In one embodiment, the gate plate 1 is provided with a handle 11, located on the side of the gate plate 1 away from the overflow port. Four reinforcing ribs 12 are fixedly connected between the gate plate 1 and the handle 11. The handle 11 facilitates movement of the gate plate 1 and secures it to the overflow port of the fluidized bed roaster 5. In this embodiment, the handle 11 is a high-temperature resistant steel pipe with a diameter of 5 cm and a length of 2.5 m. The handle 11 is welded to the center of the gate plate 1.

[0047] As an embodiment, a sealing gasket 14 is provided on the end surface of the gate plate 1 that contacts the overflow port. The sealing gasket 14 further ensures that the gate plate 1 seals the overflow port, thereby preventing the zinc roasted sand from being discharged from the overflow port.

[0048] The embodiments described above are only preferred embodiments of the present invention and are only used to explain the present invention, not to limit the scope of implementation of the present invention. For those skilled in the art, it is of course possible to easily make other implementation methods by replacing or changing the technical content disclosed in this specification. Therefore, all changes and improvements made to the principles and process conditions of the present invention should be included in the scope of the patent application of the present invention.

Claims

1. A blocking and discharging device for a fluidized bed roasting furnace, characterized in that: The invention comprises a gate plate (1) and a fixing mechanism, wherein the gate plate (1) is placed at the overflow port of a fluidized bed roasting furnace (5) and the gate plate (1) seals the overflow port, and the fixing mechanism comprises a first fixing seat (2) and a second fixing seat (3), wherein the first fixing seat (2) is arranged on the outer wall of the fluidized bed roasting furnace (5) and is located on the side of the overflow port, and the second fixing seat (3) is arranged on the gate plate (1) and corresponds to the first fixing seat (2), and a movable column (31) is movably arranged on the second fixing seat (3), and the movable column (31) is detachably connected to the first fixing seat (2).

2. The blocking and discharging device according to claim 1, characterized in that: A through hole is provided on the second fixing seat (3), one end of the movable column (31) passes through the through hole and is provided with a limit block (32), the other end of the movable column (31) is provided with a suction cup (33), a smooth plate (21) is provided at a position of the first fixing seat (2) corresponding to the suction cup (33), and the suction cup (33) is fixedly connected to the smooth plate (21).

3. The blocking and discharging device according to claim 2, characterized in that: A return spring (34) is wound around the movable column (31), and the end of the return spring (34) is fixedly connected to the inner wall of the through hole.

4. The blocking and discharging device according to claim 2, characterized in that: The second fixing seat (3) is provided with a first pin hole and the first pin hole is communicated with the through hole. The movable column (31) is provided with a second pin hole. A pin shaft is fixedly connected in the first pin hole and the second pin hole.

5. The blocking and discharging device according to claim 1, characterized in that: A fixing column (22) is provided on the first fixing seat (2), and a fixing hole is provided on the second fixing seat (3) at a position corresponding to the fixing column (22), and the fixing column (22) passes through the fixing hole.

6. The blocking and discharging device according to claim 1, characterized in that: A fixed plate (4) is rotatably provided on the outer wall of the fluidized bed roasting furnace (5), and the fixed plate (4) is located on a side of the first fixed seat (2) away from the overflow port. A slot (13) is provided on the gate plate (1), and the slot (13) is located on a side of the gate plate (1) away from the overflow port, and an end portion of the fixed plate (4) is snapped into the slot (13).

7. The blocking and discharging device according to claim 1, characterized in that: A handle (11) is provided on the gate plate (1), and the handle (11) is located on a side of the gate plate (1) away from the overflow port. A plurality of reinforcing ribs (12) are fixedly connected between the gate plate (1) and the handle (11).

8. The blocking and discharging device according to claim 1, characterized in that: A sealing gasket (14) is provided on the end surface of the gate plate (1) that contacts the overflow port.

Images