Pellet feeding device capable of preventing coking fly ash from spraying bin and control method of pellet feeding device

Abstract

The invention discloses a pellet feeding device capable of preventing coking fly ash from spraying a bin and a control method of the pellet feeding device. The pellet feeding device comprises a fixed base, a surge bin, a decrement weighing hopper, a discharging channel I and a screw feeder. A batching belt horizontally and transversely penetrates through the lower middle position of the interior of the fixed base, a discharging channel I is horizontally and transversely formed in the position, opposite to the position over the batching belt, in the fixed base, and a spiral feeder is coaxially arranged in the discharging channel I; the discharging end of the spiral feeder is arranged at the position close to the right end of the first discharging channel, and a second discharging channel is vertically arranged on the lower surface of the first discharging channel relative to the discharging end of the spiral feeder in a communicating mode. A decrement weighing hopper is further vertically arranged in the fixed base relative to the position over the first discharging channel, a buffering bin is arranged above the decrement weighing hopper, and a star-shaped feeding machine is arranged between the buffering bin and the decrement weighing hopper in a communicating mode. The phenomenon that the tail of the roasting machine is hardened due to carbon fluctuation is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of pellet production, and in particular to a pellet feeding device capable of preventing coking dust from spraying into a bin and a control method thereof. Background Art

[0002] In order to reduce costs and increase efficiency, more and more pelletizing plants are looking for ways to add coking dust to reduce coal gas consumption. However, in the process of using coking dust, there is the problem that coking dust is easy to spray into the warehouse. If it is not discovered immediately after spraying, the carbon content of the raw balls will increase sharply, and the fluctuation of carbon content will bring the following problems: 1) It is very easy to cause local overburning and hardening of the tail discharge; 2) Red balls will appear in the discharge, which will burn the belt and even cause a fire; 3) Large pieces will appear in the tail discharge chute, which cannot be discharged and can only be cleared manually with a long chisel, which will eventually force the roasting machine to shut down. Therefore, how to prevent coking dust from spraying into the warehouse has become a problem that needs to be solved urgently. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a pellet feeding device and a control method thereof which can prevent coking dust from spraying the bin. Problems such as coking dust spraying the bin, star-type feeder being blocked and unable to discharge material, spiral feeder always idling, or the amount of coking dust discharged not matching the set amount can be immediately known, and will not cause carbon fluctuations in the mixed material, thereby solving the bin spraying phenomenon and avoiding the occurrence of material compaction at the tail of the roasting machine due to carbon fluctuations, thereby ensuring stable, efficient and safe production.

[0004] In order to solve the above technical problems, the present invention adopts the following technical scheme: a pellet feeding device of the present invention which can prevent the coking dust from spraying out of the bin has the following innovations: it includes a fixed base, a buffer bin, a star feeder, a weight reduction weighing hopper, a feeding channel I, a screw feeder and a feeding channel II; the fixed base is a vertically arranged hollow rectangular frame structure, and the batching belt horizontally passes through the lower middle position of the interior of the fixed base; a feeding channel I is also horizontally and horizontally arranged in parallel with the feeding belt directly above the fixed base, and both ends of the feeding channel I extend vertically out of the left and right sides of the fixed base, and there is also a coaxial feeding channel inside the fixed base. A screw feeder is sleeved; the discharge end of the screw feeder is arranged at the right end of the discharge channel I, and a discharge channel II is vertically connected to the lower surface of the discharge channel I relative to the discharge end of the screw feeder, and ensure that the lower end of the discharge channel II is arranged opposite to the batching belt; a reduction weighing hopper is vertically provided inside the fixed base relative to the top of the discharge channel I, and a buffer bin is provided above it, and a star feeder is connected between the buffer bin and the reduction weighing hopper, and then the material in the buffer bin is added to the reduction weighing hopper through the star feeder, and then sent to the batching belt through the discharge channel II by the screw feeder.

[0005] Preferably, it also includes a pneumatic quick-cut valve; the buffer bin is a horizontally arranged funnel-shaped structure, and its lower end is a small-diameter end; a pneumatic quick-cut valve is also connected to the lower port of the buffer bin, and the pneumatic quick-cut valve is used to automatically cut off the discharge of the buffer bin.

[0006] Preferably, it also includes a manual gate valve; a manual gate valve is also connected between the lower end of the buffer bin and the star feeder, and the manual gate valve does not interfere with the action of the pneumatic quick-cut valve, and the discharge amount of the buffer bin is controlled by the manual gate valve.

[0007] Preferably, it also includes an inspection port; an inspection port is also provided on the upper surface of the feed channel I relative to the feed channel II, and the inspection port does not interfere with the feeding action of the screw feeder.

[0008] Preferably, it also includes a blanking baffle; the decremental weighing bucket is suspended in the fixed base, and a blanking port is vertically embedded and penetrated in the middle position of the inner bottom surface of the decremental weighing bucket, and the decremental weighing bucket is sealed and connected with the inner part of the blanking channel I through the blanking port; blanking baffles matching with it are symmetrically arranged on the inner bottom surface of the decremental weighing bucket relative to the left and right sides of the blanking port, and the lower end of each blanking baffle is fixedly connected to the inner bottom surface of the decremental weighing bucket relative to the edge of the blanking port, and the upper end thereof extends upwardly and obliquely away from the blanking port, and is fixedly connected to the left and right inner side surfaces of the decremental weighing bucket, and then the material in the decremental weighing bucket is guided and collected into the blanking channel I through the blanking baffle, and then transported to the blanking channel II through the screw feeder.

[0009] Preferably, the inclination angle of each of the blanking baffles is 40°~60°, and the distance between the lower ends of the two blanking baffles is 30 cm.

[0010] Preferably, it also includes a material unloading control board; a matching material unloading control board is horizontally inserted in the lower middle position of the material unloading channel II, and the material unloading amount falling onto the batching belt through the material unloading channel II is controlled by the material unloading control board.

[0011] The invention discloses a control method for a pellet feeding device capable of preventing the coking dust from spraying into a bin, and its innovation lies in that it comprises the following steps: (1) First, according to production requirements, the discharge amount of the buffer bin is controlled by the manual gate valve, and the discharge amount of the discharge channel II is controlled by the discharge control panel; (2) Then the material in the buffer bin is added to the weight reduction hopper through the star feeder, and is buffered by the drop baffle and falls into the discharge channel I, and then slowly transported to its discharge end under the action of the screw feeder, and slowly and evenly falls onto the batching belt through the discharge channel II; (3) When the star feeder takes more than 40 seconds to fill the weighing hopper with material and the material is not filled to 900 kg or more, the star feeder and the screw feeder will all stop; (4) When the net weight of the weighing hopper is between 450 kg and 500 kg and cannot be replenished to 500 kg within 15 seconds, the star feeder and the screw feeder will all stop; (5) When the net weight of the weighing bucket is less than 450 kg, the star feeder and the screw feeder will all stop; (6) When the net weight of the weighing bucket drops by more than 10 kg within 10 seconds, the star feeder and the screw feeder will all stop; (7) When the net weight of the weighing bucket drops below 0.6 kg within 10 seconds, the star feeder and the screw feeder will all stop; (8) When the deviation between the set value and the feedback value of the screw feeder exceeds ±0.5t, or the feedback value is greater than 5% of the set ratio and the feedback value is greater than 3t, the star feeder and the screw feeder will all stop; (9) When the buffer bin discharge rate is greater than 850 kg per minute, the pneumatic quick-cut valve automatically cuts off the discharge of the buffer bin.

[0012] Beneficial effects of the present invention: (1) The present invention can immediately detect problems such as the coking dust ash spraying bin, the star feeder being blocked and not feeding, the spiral feeder running idle, or the coking dust ash feeding amount not matching the set amount, etc., without causing carbon fluctuations in the mixed material, solving the bin spraying phenomenon and avoiding the occurrence of the material agglomeration phenomenon at the tail of the roasting machine due to carbon fluctuations, thereby ensuring stable, efficient and safe production; (2) The present invention can prevent the dust-collected coke ash from directly rushing onto the screw feeder and falling onto the belt through the gap during the falling process of the dust-collected coke ash by adding a falling baffle. (3) The present invention provides a material discharge control panel at the discharge end of the screw feeder, thereby controlling the discharge of coking dust onto the belt. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 The present invention is a schematic structural diagram of a pellet feeding device capable of preventing the coking dust from spraying into the silo.

[0015] Among them, 1-fixed base; 2-batching belt; 3-buffer bin; 4-pneumatic quick-cut valve; 5-manual plug valve; 6-star feeder; 7-reducing weighing hopper; 8-discharging channel I; 9-screw feeder; 10-discharging channel II; 11-discharging control panel; 12-inspection port; 13-discharging baffle. DETAILED DESCRIPTION

[0016] The technical solution of the present invention will be clearly and completely described below through specific implementation methods.

[0017] The pellet feeding device of the present invention can prevent the coking dust from spraying the bin, comprising a fixed base 1, a buffer bin 3, a star feeder 6, a weight reduction weighing hopper 7, a feeding channel I8, a screw feeder 9 and a feeding channel II10; the specific structure is as follows Figure 1As shown, the fixed base 1 is a vertically arranged hollow rectangular frame structure, and the batching belt 2 horizontally passes through the lower middle position of the fixed base 1; a feeding channel Ⅰ8 is also horizontally and horizontally arranged in parallel with the upper part of the batching belt 2 inside the fixed base 1, and both ends of the feeding channel Ⅰ8 extend vertically to the left and right sides of the fixed base 1, and a screw feeder 9 is also coaxially sleeved therein; the discharge end of the screw feeder 9 is arranged at the right end of the feeding channel Ⅰ8, and the lower surface of the feeding channel Ⅰ8 is vertically arranged relative to the discharge end of the screw feeder 9. A feeding channel Ⅱ10 is directly connected thereto, and it is ensured that the lower end of the feeding channel Ⅱ10 is arranged opposite to the batching belt 2, and does not interfere with the transmission action of the batching belt 2; a reduction weighing bucket 7 is also vertically provided inside the fixed base 1 relative to directly above the feeding channel Ⅰ8, and a buffer bin 3 is provided above it, and a star feeder 6 is connected between the buffer bin 3 and the reduction weighing bucket 7, and then the material in the buffer bin 3 is added to the reduction weighing bucket 7 through the star feeder 6, and then sent to the batching belt 2 through the feeding channel Ⅱ10 by the screw feeder 9.

[0018] like Figure 1 As shown, the buffer bin 3 is a horizontally arranged funnel-shaped structure, and its lower end is a small-diameter end; a pneumatic quick-cut valve 4 is also connected at the lower port of the buffer bin 3, and the pneumatic quick-cut valve 4 is used to automatically cut off the discharge of the buffer bin 3.

[0019] like Figure 1 As shown, a manual gate valve 5 is also provided between the lower end of the buffer bin 3 and the star feeder 6, and the manual gate valve 5 does not interfere with the action of the pneumatic quick-cut valve 4, and the discharge amount of the buffer bin 3 is controlled by the manual gate valve 5.

[0020] like Figure 1 As shown, an inspection port 12 is provided on the upper surface of the material discharge channel I8 relative to the position of the material discharge channel II10, and the inspection port 12 does not interfere with the feeding action of the screw feeder 9, and the material can enter the material discharge channel I8 through the inspection port 12 for subsequent maintenance work.

[0021] like Figure 1As shown, the weight-reducing weighing bucket 7 is suspended in the fixed base 1, and a discharge port is vertically embedded and penetrated in the middle position of the inner bottom surface of the weight-reducing weighing bucket 7, and the weight-reducing weighing bucket 7 is sealed and connected with the inner part of the discharge channel Ⅰ8 through the discharge port; the inner bottom surface of the weight-reducing weighing bucket 7 is also obliquely and symmetrically provided with matching blanking baffles 13 on the left and right sides relative to the discharge port, and the lower end of each blanking baffle 13 is fixedly connected to the inner bottom surface of the weight-reducing weighing bucket 7 relative to the edge of the discharge port, and the upper end thereof extends obliquely upward away from the discharge port, and is fixedly connected to the left and right inner side surfaces of the weight-reducing weighing bucket 7, and then the material in the weight-reducing weighing bucket 7 is guided and collected into the discharge channel Ⅰ8 through the blanking baffle 13, and then transported to the discharge channel Ⅱ10 through the screw feeder 9; wherein, the inclination angle of each blanking baffle 13 is 40°~60°, and the distance between the lower ends of the two blanking baffles 13 is 30cm.

[0022] like Figure 1 As shown, a material discharge control board 11 matching with the material discharge channel II 10 is horizontally inserted in the middle lower position, and the material discharge amount falling onto the batching belt 2 through the material discharge channel II 10 is controlled by the material discharge control board 11 .

[0023] A control method for a pellet feeding device capable of preventing coking dust from spraying into a bin according to the present invention is as follows: Figure 1 As shown, the following steps are included: (1) First, according to production requirements, the discharge amount of the buffer bin 3 is controlled by the manual gate valve 5, and the discharge amount of the discharge channel II 10 is controlled by the discharge control panel 11.

[0024] (2) The material in the buffer bin 3 is then added to the weight reduction weighing hopper 7 through the star feeder 6, and is buffered by the drop baffle 13 and falls into the discharge channel I8, and is then slowly transported to its discharge end by the action of the screw feeder 9, and slowly and evenly falls onto the batching belt 2 through the discharge channel II10.

[0025] (3) When the time for the star feeder 6 to replenish the weighing hopper 7 exceeds 40 seconds and the material is not replenished to 900 kg or more, the star feeder 6 and the screw feeder 9 will all stop.

[0026] (4) When the net weight of the weight-reducing weighing bucket 7 is between 450 kg and 500 kg and cannot be replenished to 500 kg within 15 seconds, the star feeder 6 and the screw feeder 9 will all stop.

[0027] (5) When the net weight of the weight reduction weighing bucket 7 is less than 450 kg, the star feeder 6 and the screw feeder 9 will all stop.

[0028] (6) When the net weight of the weighing bucket 7 drops by 10 kg or more within 10 seconds, the star feeder 6 and the screw feeder 9 will all stop.

[0029] (7) When the net weight of the weighing bucket 7 drops below 0.6 kg within 10 seconds, the star feeder 6 and the screw feeder 9 will all stop.

[0030] (8) When the deviation between the set value and the feedback value of the screw feeder 9 exceeds ±0.5t, or the feedback value is greater than 5% of the set ratio and the feedback value is greater than 3t, the star feeder 6 and the screw feeder 9 will all stop.

[0031] (9) When the material discharge rate of buffer bin 3 exceeds 850 kg per minute, the pneumatic quick-cut valve 4 automatically cuts off the material discharge of buffer bin 3.

[0032] Through the control method described above, if there are problems such as coking dust spraying, star feeder 6 being blocked and not discharging material, screw feeder 9 always running idle, or the amount of coking dust discharged does not match the set amount, the star feeder 6 and the screw feeder 9 will all stop and issue an alarm, and the operator will proceed with subsequent operations after confirmation.

[0033] Beneficial effects of the present invention: (1) The present invention can immediately detect problems such as the coking dust ash spraying bin, the star feeder 6 being blocked and not feeding, the spiral feeder 9 always running idle, or the coking dust ash feeding amount not matching the set amount, etc., without causing carbon fluctuations in the mixed material, solving the bin spraying phenomenon and avoiding the occurrence of the material agglomeration phenomenon at the tail of the roasting machine due to carbon fluctuations, thereby ensuring stable, efficient and safe production; (2) The present invention adds a falling baffle plate 13 to prevent the dust-removed coke ash from directly rushing onto the screw feeder 9 and falling onto the belt through the gap during the falling process of the dust-removed coke ash. (3) The present invention provides a material discharge control panel 11 at the discharge end of the screw feeder 9, so that the coking dust can be controlled during the material discharge process onto the belt.

[0034] The embodiments described above are merely descriptions of preferred implementation modes of the present invention, and are not intended to limit the concept and scope of the present invention. Without departing from the design concept of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary engineering technicians in the field should fall within the protection scope of the present invention. The technical contents for which protection is sought in the present invention have been fully recorded in the technical requirements.

Claims

1. A pellet feeding device capable of preventing the coking dust from spraying into the bin, characterized in that: It includes a fixed base, a buffer bin, a star feeder, a weight-reducing weighing hopper, a feeding channel I, a screw feeder and a feeding channel II; the fixed base is a vertically arranged hollow rectangular frame structure, and the batching belt horizontally passes through the lower middle position of the fixed base; a feeding channel I is also horizontally and horizontally arranged in parallel with the upper part of the batching belt inside the fixed base, and both ends of the feeding channel I extend vertically out of the left and right sides of the fixed base, and a screw feeder is coaxially sleeved therein; the discharge end of the screw feeder is arranged near the At the right end of the feeding channel I, a feeding channel II is vertically connected to the lower surface of the feeding channel I relative to the discharge end of the screw feeder, and ensure that the lower end of the feeding channel II is arranged opposite to the batching belt; a reduction weighing hopper is vertically arranged inside the fixed base relative to directly above the feeding channel I, and a buffer bin is arranged above it, and a star feeder is connected between the buffer bin and the reduction weighing hopper, and then the material in the buffer bin is added to the reduction weighing hopper through the star feeder, and then sent to the batching belt through the feeding channel II by the screw feeder.

2. A pellet feeding device capable of preventing the coking dust from spraying into the silo according to claim 1, characterized in that: It also includes a pneumatic quick-cut valve; the buffer bin is a horizontally arranged funnel-shaped structure, and its lower end is a small-diameter end; a pneumatic quick-cut valve is also connected at the lower port of the buffer bin, and the pneumatic quick-cut valve is used to automatically cut off the discharge of the buffer bin.

3. A pellet feeding device capable of preventing the coking dust from spraying into the silo according to claim 2, characterized in that: It also includes a manual gate valve; a manual gate valve is also connected between the lower end of the buffer bin and the star feeder, and the manual gate valve does not interfere with the action of the pneumatic quick-cut valve, and the discharge amount of the buffer bin is controlled by the manual gate valve.

4. The pellet feeding device capable of preventing the coking dust from spraying into the silo according to claim 1 is characterized in that: It also includes an inspection port; an inspection port is also opened on the upper surface of the feed channel I relative to the feed channel II, and the inspection port does not interfere with the feeding action of the screw feeder.

5. The pellet feeding device capable of preventing the coking dust from spraying into the silo according to claim 1 is characterized in that: It also includes a blanking baffle; the decrement weighing bucket is suspended in the fixed base, and a blanking port is vertically embedded and penetrated in the middle position of the inner bottom surface of the decrement weighing bucket, and the decrement weighing bucket is sealed and connected with the inner part of the blanking channel I through the blanking port; blanking baffles matching with it are symmetrically arranged on the inner bottom surface of the decrement weighing bucket relative to the left and right sides of the blanking port, and the lower end of each blanking baffle is fixedly connected to the inner bottom surface of the decrement weighing bucket relative to the edge of the blanking port, and the upper end thereof extends upwardly and obliquely away from the blanking port, and is fixedly connected to the left and right inner side surfaces of the decrement weighing bucket, and then the material in the decrement weighing bucket is guided and collected into the blanking channel I through the blanking baffle, and then transported to the blanking channel II through the screw feeder.

6. A pellet feeding device capable of preventing the coking dust from spraying into the silo according to claim 5, characterized in that: The inclination angle of each of the blanking baffles is 40°~60°, and the distance between the lower ends of the two blanking baffles is 30 cm.

7. A pellet feeding device capable of preventing the coking dust from spraying into the silo according to claim 5, characterized in that: It also includes a material unloading control board; a matching material unloading control board is horizontally inserted in the lower middle position of the unloading channel II, and the material unloading amount falling onto the batching belt through the unloading channel II is controlled by the unloading control board.

8. A control method for a pellet feeding device capable of preventing coking dust from spraying into a bin according to any one of claims 1 to 7, characterized in that The following steps are involved: (1) First, according to production requirements, the discharge amount of the buffer bin is controlled by the manual gate valve, and the discharge amount of the discharge channel II is controlled by the discharge control panel; (2) Then the material in the buffer bin is added to the weight reduction hopper through the star feeder, and is buffered by the drop baffle and falls into the discharge channel I, and then slowly transported to its discharge end under the action of the screw feeder, and slowly and evenly falls onto the batching belt through the discharge channel II; (3) When the star feeder takes more than 40 seconds to fill the weighing hopper with material and the material is not filled to 900 kg or more, the star feeder and the screw feeder will all stop; (4) When the net weight of the weighing hopper is between 450 kg and 500 kg and cannot be replenished to 500 kg within 15 seconds, the star feeder and the screw feeder will all stop; (5) When the net weight of the weighing bucket is less than 450 kg, the star feeder and the screw feeder will all stop; (6) When the net weight of the weighing bucket drops by more than 10 kg within 10 seconds, the star feeder and the screw feeder will all stop; (7) When the net weight of the weighing bucket drops below 0.6 kg within 10 seconds, the star feeder and the screw feeder will all stop; (8) When the deviation between the set value and the feedback value of the screw feeder exceeds ±0.5t, or the feedback value is greater than 5% of the set ratio and the feedback value is greater than 3t, the star feeder and the screw feeder will all stop; (9) When the buffer bin discharge rate is greater than 850 kg per minute, the pneumatic quick-cut valve automatically cuts off the discharge of the buffer bin.

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