CN114259934B - Powder mixing dedusting method and system - Google Patents
Powder mixing dedusting method and system Download PDFInfo
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- CN114259934B CN114259934B CN202111347677.9A CN202111347677A CN114259934B CN 114259934 B CN114259934 B CN 114259934B CN 202111347677 A CN202111347677 A CN 202111347677A CN 114259934 B CN114259934 B CN 114259934B
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- 239000000843 powder Substances 0.000 title claims abstract description 279
- 238000000034 method Methods 0.000 title claims abstract description 43
- 239000000428 dust Substances 0.000 claims abstract description 351
- 230000003139 buffering effect Effects 0.000 claims abstract description 24
- 238000003756 stirring Methods 0.000 claims abstract description 24
- 238000005303 weighing Methods 0.000 claims abstract description 24
- 239000000463 material Substances 0.000 claims abstract description 10
- 238000007789 sealing Methods 0.000 claims description 61
- 230000007246 mechanism Effects 0.000 claims description 31
- 230000001502 supplementing effect Effects 0.000 claims description 5
- 230000007704 transition Effects 0.000 claims description 3
- 238000005265 energy consumption Methods 0.000 abstract description 8
- 238000007599 discharging Methods 0.000 abstract description 4
- 230000008569 process Effects 0.000 description 6
- 230000033228 biological regulation Effects 0.000 description 3
- 239000004568 cement Substances 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000011812 mixed powder Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000004570 mortar (masonry) Substances 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Abstract
The invention provides a powder mixing dedusting method and a powder mixing dedusting system, wherein a loading scale bucket, a stirrer and a powder buffer tank are sequentially arranged along the material flow direction and are connected in parallel through a dust collection balance pipe; conveying powder into a feeding scale hopper for weighing, discharging dust-containing air into a dust collection balance pipe communicated between the feeding scale hopper and a dust remover; after the powder is weighed, the powder falls into a stirrer and is communicated with a dust collection balance pipe between a feeding scale hopper and the stirrer; starting the stirrer after the powder blanking is finished, and communicating a dust collection balance pipe between the stirrer and the dust remover; after the powder stirring is finished, the powder is conveyed to enter a powder buffering box and is communicated with a dust collection balance pipe between the stirrer and the powder buffering box. According to the invention, a set of dust collection balance pipe and a dust remover can ensure that the powder smoothly falls under a constant pressure condition, so that dust removal points in the working procedure are reduced, the cost of powder dust removal equipment is reduced, and meanwhile, a single dust removal point performs centralized dust removal treatment according to the working procedure, and the cost of powder mixing energy consumption is reduced.
Description
Technical Field
The invention belongs to the technical field of powder mixing and dust removal, and particularly relates to a powder mixing and dust removal method and system.
Background
A large amount of dust can be thrown up in the powder conveying, stirring and mixing processes in various fields such as cement, metallurgy and dry-mixed mortar, on one hand, the environmental sanitation, the physical health of workers and the environmental evaluation requirements of equipment operation are influenced by the large amount of dust, and on the other hand, the proportion of the components of the mixture can be changed due to the fact that the light-weight dust is thrown up, and the product quality problem is seriously caused. The dust removal mode of the existing stirring equipment mainly comprises two modes: one is to directly install a filter bag on a container, but the dust removal mode is only suitable for powder with little raised dust, low dust viscosity and difficult moisture regaining, but the filter capacity of the filter bag is fixed, and the filter capacity of the filter bag is smaller along with the increase of the service life, and when the powder input conveying amount is large, the insufficient filter capacity of the filter bag easily causes the increase of the pressure intensity in the container to influence the weighing precision and the feeding speed, so that the air-permeable cloth bag needs to be cleaned and replaced regularly, but the good air-permeable cloth bag is expensive, and the dust removal mode has high use and maintenance cost; the other type is dust collection cover type dust collection, the air pressure balance in the dust collection mode container is not easy to control, the energy consumption requirement is large, light dust is easy to be pumped away, and the component proportion of mixed powder is greatly influenced.
Disclosure of Invention
The invention mainly aims to provide a powder mixing dust removal method and a powder mixing dust removal system, and aims to solve the technical problems of dust removal environment, high dust removal cost and high use energy consumption in the powder circulation and stirring processes in the prior art.
In order to achieve the above object, the present invention provides a powder mixing dust removal method, wherein the powder mixing dust removal method comprises the steps of:
step S1, arranging a loading scale bucket, a stirrer and a powder buffering box in sequence along the material flow direction, connecting the loading scale bucket, the stirrer and the powder buffering box in parallel through a dust collection balance pipe, and arranging a dust remover corresponding to a dust outlet of the dust collection balance pipe;
step S2, conveying powder into the loading scale bucket for powder weighing, communicating the dust collection balance pipe between the loading scale bucket and the dust remover and closing other pipelines, so that air containing dust in the loading scale bucket is sucked into the dust remover through the dust collection balance pipe;
step S3, after the powder is weighed, the powder falls into the stirrer to perform powder blanking, the dust collection balance pipe between the loading scale hopper and the stirrer is communicated, and other pipelines are closed, so that the air in the stirrer is backfilled into the loading scale hopper through the dust collection balance pipe to form air pressure balance;
step S4, after powder blanking is finished, starting the stirrer to stir the powder, communicating the dust collection balance pipe between the stirrer and the dust remover, and closing other pipelines to enable air containing dust in the stirrer to be sucked into the dust remover through the dust collection balance pipe;
and step S5, after the powder is stirred, conveying the powder into the powder cache box, communicating the dust collection balance pipe between the stirrer and the powder cache box and closing the dust collection balance pipe between the stirrer and the dust remover, so that air containing dust in the powder cache box enters the stirrer through the dust collection balance pipe and forms air pressure balance.
In the embodiment of the present invention, before step S1, a dust collector is disposed at a dust outlet of the dust collecting balance pipe after a settling mechanism for settling dust is disposed at the dust outlet;
step S2 further comprises the step of enabling air containing dust in the feeding scale bucket to be sucked into the dust remover through the dust collection balance pipe after being settled by the settling mechanism;
and step S4, the method also comprises the step of sucking the air containing dust in the stirrer into the dust remover through the dust collection balance pipe after the air containing dust is settled by the settling mechanism.
In the embodiment of the invention, the powder mixing dedusting method further comprises the following steps:
and step S6, after the powder is input into the powder cache box, communicating the dust collection balance pipe between the powder cache box and the dust remover according to a preset time interval and closing other pipelines, so that the dust collected in the settling mechanism falls back into the powder cache box.
In the embodiment of the invention, the powder mixing dedusting method further comprises the following steps:
and step S7, after the powder is input into the powder cache box, closing the dust collection balance pipe communicated between the stirrer and the powder cache box, and supplementing air into the powder cache box when a discharge hole of the powder cache box starts to discharge so as to enable the air pressure in the powder cache box to be balanced with the outside.
In this embodiment of the present invention, step S2 is preceded by:
and adjusting the suction force of the dust remover according to the volume of the powder input into the loading scale hopper in unit time.
The invention also provides a powder mixing and dedusting system, which comprises: the powder circulating device comprises a feeding scale bucket, a stirrer and a powder buffering box which are sequentially connected in series; the dust removal device comprises a dust collection balance pipe and a dust remover used for removing dust at a dust outlet of the dust collection balance pipe, and the feeding scale hopper, the stirrer and the powder cache box are connected in parallel to the dust collection balance pipe.
In the embodiment of the present invention, an inlet of the dust collection balance pipe is connected to the powder buffer tank, the feeding scale hopper is connected to the dust collection balance pipe through a first connection pipe with a first sealing valve, the stirrer is connected to the dust collection balance pipe through a second connection pipe with a second sealing valve, the dust collection balance pipe is provided with a third sealing valve, a fourth sealing valve and a fifth sealing valve, the third sealing valve is located at a dust outlet of the dust collection balance pipe, the fourth sealing valve is located between the first sealing valve and the second sealing valve, and the fifth sealing valve is located between the second sealing valve and the powder buffer tank.
In the embodiment of the present invention, the dust removing device further includes a settling mechanism disposed in the dust collecting balance pipe and located between the first connecting pipe and the third sealing valve, and the settling mechanism is used for settling dust and collecting dust.
In an embodiment of the present invention, the settling mechanism comprises: the settling chamber is used for settling and collecting dust, and is provided with a vibrator for driving the settling chamber to vibrate so as to enable the dust to fall back; the input tube, one end with the balance pipe connection gathers dust, the other end stretches into in the deposit room, just the pipe diameter of input tube is less than the pipe diameter of deposit room, the input tube with the return opening has been seted up to deposit room inner wall junction pipe lateral wall, just the return opening with the balance pipe intercommunication gathers dust.
In the embodiment of the invention, the settling chamber comprises a conical hopper and a transition part connected above the conical hopper, the lower end of the input pipe is connected with the dust collection balance pipe, the upper end of the input pipe extends into the conical hopper, and the height of the input pipe is lower than that of the conical hopper.
In the embodiment of the invention, the powder mixing and dedusting system further comprises an air supplementing fan for supplementing air to the powder buffering box.
In the embodiment of the invention, the air supply fan is connected with the powder cache box through an air supply pipeline with a sixth sealing valve.
In the embodiment of the invention, the dust collector is connected with the air pipe and is provided with the dust hood with the air volume regulating valve, and the dust hood and the dust removing opening are oppositely arranged at intervals.
Through the technical scheme, the powder mixing dust removal system provided by the embodiment of the invention has the following beneficial effects:
when the powder mixing and dedusting method is used for dedusting powder, a feeding scale hopper, a stirrer, a powder buffering box, a deduster and a dust collection balance pipe are correspondingly connected, so that the feeding scale hopper, the stirrer and the powder buffering box are sequentially connected in series and are simultaneously connected in parallel on the dust collection balance pipe to finish initial equipment assembly, then the feeding scale hopper can be used for weighing powder, the deduster is opened simultaneously, the dust collection balance pipe between the feeding scale hopper and the deduster is communicated for dedusting operation, dust-containing air in the feeding scale hopper is sucked into the deduster through the dust collection balance pipe, the deduster removes dust from the dust-containing air discharged by the feeding scale hopper in the powder weighing operation, the powder falls into the stirrer for powder blanking operation after the powder weighing is finished, the open-close state of each section of pipeline is adjusted, the dust collection balance pipe between the feeding scale hopper and the stirrer is communicated and closes the rest of pipelines simultaneously, a pressure-balancing loop is formed between a feeding scale hopper and a stirrer, so that air in the stirrer is back filled into the feeding scale hopper through a dust-collecting balance pipe and forms air pressure balance, powder can be guaranteed to smoothly fall into the stirrer, the situation that blanking is difficult due to dust rising and increase of air pressure in the stirrer is avoided, the stirrer is started to stir the powder after the powder blanking is finished, the open-close state of each pipeline is readjusted, the dust-collecting balance pipe between the stirrer and a dust remover is communicated, other pipelines are closed, dust is removed by the dust remover from air containing dust escaping in the powder stirring operation, the open-close state of each pipeline is readjusted in the discharging process after the powder stirring is finished, the gas containing dust in a powder buffer box enters the stirrer through the dust-collecting balance pipe and forms air pressure balance, and smooth falling of the powder is guaranteed. According to the powder mixing and dedusting method, through input of powder weighing, powder blanking, powder stirring and operation adjustment of powder input into the powder buffering box, multiple devices of a feeding weighing hopper, a stirrer and the powder buffering box can be realized through a set of dust collection balance pipe and a dust remover, powder can smoothly fall under the condition of constant pressure, dedusting points in a working procedure are reduced, the cost of powder dedusting equipment is reduced, and meanwhile, a single dedusting point is subjected to centralized dedusting treatment according to the working procedure, so that the energy consumption cost of powder mixing is reduced.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide an understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
FIG. 1 is a schematic flow chart of a method for dust removal by mixing powders according to a first embodiment of the present invention;
FIG. 2 is a schematic flow chart of a method for removing dust by mixing powders according to a second embodiment of the present invention;
FIG. 3 is a schematic flow chart of a method for removing dust by mixing powders according to a third embodiment of the present invention;
FIG. 4 is a schematic flow chart of a method for removing dust by mixing powders according to a fourth embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a powder mixing and dedusting system according to an embodiment of the present invention;
fig. 6 is a schematic structural view of a settling mechanism according to an embodiment of the present invention.
Description of the reference numerals
Detailed Description
The following detailed description of specific embodiments of the invention refers to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative and explanatory of the invention and are not restrictive thereof.
The powder mixing dedusting system according to the present invention is described below with reference to the accompanying drawings.
As shown in fig. 1, in an embodiment of the present invention, a powder mixing and dedusting method is provided, where the powder mixing and dedusting method includes the steps of:
step S1, arranging a loading scale bucket, a stirrer and a powder buffering box in sequence along the material flow direction, connecting the loading scale bucket, the stirrer and the powder buffering box in parallel through a dust collection balance pipe, and arranging a dust remover corresponding to a dust outlet of the dust collection balance pipe;
step S2, conveying powder into the loading scale bucket for powder weighing, communicating the dust collection balance pipe between the loading scale bucket and the dust remover and closing other pipelines, so that air containing dust in the loading scale bucket is sucked into the dust remover through the dust collection balance pipe;
step S3, after the powder is weighed, the powder falls into the stirrer to be subjected to powder blanking, the dust collection balance pipe between the loading scale hopper and the stirrer is communicated, and other pipelines are closed, so that air in the stirrer is backfilled into the loading scale hopper through the dust collection balance pipe to form air pressure balance;
step S4, after powder blanking is finished, starting the stirrer to stir the powder, communicating the dust collection balance pipe between the stirrer and the dust remover, and closing other pipelines to enable air containing dust in the stirrer to be sucked into the dust remover through the dust collection balance pipe;
and step S5, after the powder is stirred, conveying the powder into the powder cache box, communicating the dust collection balance pipe between the stirrer and the powder cache box and closing the dust collection balance pipe between the stirrer and the dust remover, so that the gas containing dust in the powder cache box enters the stirrer through the dust collection balance pipe and forms air pressure balance. It can be understood that the powder mixing and dedusting method in the embodiment is mainly used for conveying and stirring powder such as cement, dry-mixed mortar and the like.
When the powder mixing and dedusting method in the embodiment is used for dedusting powder, the feeding scale hopper, the stirrer, the powder buffer tank, the deduster and the dust collection balance pipe are correspondingly connected, so that the feeding scale hopper, the stirrer and the powder buffer tank are sequentially connected in series and are connected in parallel on the dust collection balance pipe, initial equipment assembly is completed, then the feeding scale hopper is used for powder weighing, the deduster is opened, the dust collection balance pipe between the feeding scale hopper and the deduster is communicated, dedusting operation is performed, air containing dust in the feeding scale hopper is sucked into the deduster through the dust collection balance pipe, the deduster removes dust from the feeding scale hopper in the powder weighing operation, the powder falls into the stirrer for powder blanking operation after the powder weighing is completed, the open-close state of each section of pipeline is adjusted, the dust collection balance pipe between the feeding scale hopper and the stirrer is communicated, and the rest of pipelines are closed simultaneously, a pressure balancing loop is formed between a feeding scale bucket and a stirrer, so that air in the stirrer is back filled into the feeding scale bucket through a dust collection balancing pipe and forms air pressure balance, powder can be guaranteed to smoothly fall into the stirrer, the situation that blanking is difficult due to dust rising and increase of air pressure in the stirrer is avoided, the stirrer is started to carry out powder stirring operation after powder blanking is finished, the open-close state of each pipeline section is adjusted again, the dust collection balancing pipe between the stirrer and a dust remover is communicated, other pipelines are closed, dust is removed by the dust remover when powder stirring operation is carried out, the open-close state of each pipeline section is adjusted again in the discharging process after powder stirring is finished, dust-containing gas in a powder buffer box enters the stirrer through the dust collection balancing pipe and forms air pressure balance, and smooth falling of the powder is guaranteed.
According to the powder mixing and dedusting method, through input powder weighing, powder blanking, powder stirring and operation adjustment of powder input into the powder buffering box, dedusting of a plurality of devices including a feeding scale hopper, a stirrer and the powder buffering box can be realized through a set of dust collection balance pipe and a set of dust remover, smooth falling of powder under a constant pressure condition is guaranteed, dedusting points in a working procedure are reduced, the cost of powder dedusting equipment is reduced, single dedusting point is subjected to centralized dedusting treatment according to the working procedure, and the powder mixing energy consumption cost is reduced.
In one embodiment, when the stirring machine is used for stirring operation, the dust collection balance pipe between the stirring machine and the dust remover is communicated, other pipelines are closed, meanwhile, powder is conveyed into the loading scale hopper for powder weighing, the dust collection balance pipe between the loading scale hopper and the dust remover is communicated, other pipelines are closed, and air containing dust in the loading scale hopper is sucked into the dust remover through the dust collection balance pipe. The steps S2 and S5 are carried out simultaneously, so that the continuity of powder mixing is ensured, and the production efficiency of powder mixing is improved.
As shown in fig. 2, in the embodiment of the present invention, step S1 includes, before the step, providing a settling mechanism for settling the dust at the dust outlet;
step S2 further comprises the step of enabling the dust-containing air in the feeding scale bucket to be sucked into the dust remover through the dust collection balance pipe after the dust-containing air is settled by the settling mechanism;
and step S4, the method also comprises the step of sucking the air containing dust in the stirrer into the dust remover through the dust collection balance pipe after the air containing dust is settled by the settling mechanism.
Through the settlement mechanism that will subside the dust that sets up in advance in dust outlet department in this embodiment for containing dust air can inhale the dust remover through the balance pipe that gathers dust after subsideing by the mechanism that subsides in the material loading scale bucket, containing dust air inhales the dust remover through the balance pipe that gathers dust after subsideing by the mechanism that subsides in the mixer, will contain the great dust of proportion in the dust air and subside in advance through the mechanism that subsides and then carry out the dust removal operation, make the dust remover only remove dust to the less dust air of comparison weight, can prolong dust remover filter bag life, reduce the suction requirement and the use consumption of dust remover.
As shown in fig. 3, in the embodiment of the present invention, the powder mixing dust removal method further includes:
and step S6, after the powder is input into the powder cache box, communicating the dust collection balance pipe between the powder cache box and the dust remover according to a preset time interval and closing other pipelines, so that the dust collected in the settling mechanism falls back into the powder cache box.
After powder input powder buffer memory case was accomplished in this embodiment, can also fall the dust of collecting in the mechanism of subsiding back to powder buffer memory case with the time interval of predetermineeing, realize the dust recovery of removing dust and collecting and recycle, can guarantee that the ratio of mixing powder composition does not change and guarantee product quality, can also reduce the dust discharge amount simultaneously, prolong the life of dust remover.
As shown in fig. 4, in the embodiment of the present invention, the powder mixing dust removal method further includes:
and step S7, after the powder is input into the powder cache box, closing the dust collection balance pipe communicated between the stirrer and the powder cache box, and supplementing air into the powder cache box when a discharge hole of the powder cache box starts to discharge so as to enable the air pressure in the powder cache box to be balanced with the outside.
In this embodiment, after the powder is input into the powder cache box, air is supplemented into the powder cache box according to the output powder volume of the powder cache box, so that air pressure balance is formed, smooth output of the powder is ensured, and the powder output efficiency is improved.
In this embodiment of the present invention, step S2 is preceded by:
and adjusting the suction force of the dust remover according to the volume of the powder input into the loading scale hopper in unit time.
In this embodiment, the dust remover is adjusted to different air volumes according to the volume of the powder input by the loading scale hopper in different unit times, specifically, the larger the volume of the input powder in the unit time is, the larger the air volume and the suction force of the dust remover are, and the air volume and the suction force of the dust remover can be adjusted by adjusting the rotating speed of the fan of the dust remover, so that the suction force of the dust remover can ensure that dust-containing air overflowing from the dust outlet does not escape from the range of the dust hood, and meanwhile, unnecessary energy consumption in the dust removing process can be avoided.
As shown in fig. 5 and fig. 6, the present invention further provides a powder mixing and dust removing system 100, wherein the powder mixing and dust removing system 100 includes a powder circulating device 1 and a dust removing device 2; the powder circulating device 1 comprises a feeding scale bucket 11, a stirrer 12 and a powder buffer tank 13 which are sequentially connected in series; the dust removing device 2 comprises a dust collecting balance pipe 21 and a dust remover 3 for removing dust at a dust outlet of the dust collecting balance pipe 21, and the feeding scale bucket 11, the stirrer 12 and the powder buffering box 13 are connected in parallel to the dust collecting balance pipe 21.
In one embodiment, the upper end of the loading scale bucket 11 is connected with a powder conveying pipeline 5 with a sealing valve, the dust remover 3 is a pulse dust remover, the dust remover 3 can be arranged at a high position, the loading scale bucket 11, the stirrer 12 and the powder buffering box 13 are connected in series from top to bottom through the powder conveying pipeline 5 in a sealing manner, powder transmission among the loading scale bucket 11, the stirrer 12 and the powder buffering box 13 is realized by controlling the opening and closing of the sealing valve of the powder conveying pipeline 5, and the lower end of the powder buffering box 13 outputs powder through the terminal output device 6.
When the powder mixing and dedusting system 100 in this embodiment is used to remove dust from powder, the loading scale bucket 11, the stirrer 12, the powder buffer tank 13, the deduster 3 and the dust collection balance pipe 21 are connected correspondingly, so that the loading scale bucket 11, the stirrer 12 and the powder buffer tank 13 are sequentially connected in series and are simultaneously connected in parallel to the dust collection balance pipe 21, thereby completing the assembly of the powder mixing and dedusting system 100. And then, the feeding scale bucket 11 can be used for weighing powder, the dust remover 3 is started at the same time, the dust collection balance pipe 21 between the feeding scale bucket 11 and the dust remover 3 is communicated, the dust removal operation is carried out, air containing dust in the feeding scale bucket 11 is sucked into the dust remover 3 through the dust collection balance pipe 21, and the dust remover 3 removes dust from the feeding scale bucket 11 in the powder weighing operation. In the feeding process of the feeding scale bucket 11 in the embodiment, air in the feeding scale bucket 11 is passively discharged through the dust collection balance pipe 21, the air pressure in the feeding scale bucket 11 is kept unchanged, the situation that the weighing precision is influenced by the air pressure is avoided, and the weighing precision is improved.
The powder is weighed and will fall into mixer 12 after accomplishing and carry out the powder blanking operation, adjust the state of opening and shutting of each section pipeline, communicate the balanced pipe 21 that gathers dust between material loading scale bucket 11 and mixer 12 and close all the other pipelines simultaneously, form the constant pressure return circuit between material loading scale bucket 11 and mixer 12, make mixer 12 air through gather dust balanced pipe 21 backfill material loading scale bucket 11 and form atmospheric pressure balance, can guarantee that the powder falls into mixer 12 under the smooth and easy, avoided leading to the unsmooth condition of blanking because of the increase of mixer 12 internal gas pressure. After the powder blanking is finished, the stirrer 12 is started to stir the powder, the open-close state of each pipeline is adjusted again, the dust collection balance pipe 21 between the stirrer 12 and the dust remover 3 is communicated, the rest pipelines are closed, and the dust remover 3 removes dust from the air containing dust discharged from the stirrer 12 in the powder stirring operation. After the powder is stirred, the on-off state of each pipeline is adjusted again, so that the gas containing dust in the powder buffering box 13 enters the stirrer 12 through the dust collection balance pipe 21 to form air pressure balance, the powder is guaranteed to smoothly fall into the powder buffering box, and no dust is raised. According to the powder mixing and dedusting system 100, through input powder weighing, powder blanking, powder stirring, operation of the powder input powder buffer tank 13 and opening and closing of the sealing valve, dedusting and pressure balancing of a plurality of devices of the loading scale hopper 11, the stirrer 12 and the powder buffer tank 13 can be realized through one set of dust collection balance pipe 21 and one dust remover 3, smooth falling of powder under a plurality of pressure balancing procedures is guaranteed, meanwhile, dust escape is avoided, and dedusting cost and energy consumption cost of powder mixing and dedusting are reduced. In one embodiment, to ensure the weighing operation of the loading scale 11 and the blanking efficiency of the mixer 12 and to avoid powder residue, the loading scale 11 is provided with a flow-assisting nozzle 111 and the mixer 12 is provided with a vibrating drive 121.
As shown in fig. 5, in the embodiment of the present invention, an inlet of the dust balance pipe 21 is connected to the powder buffer tank 13, the loading scale bucket 11 is connected to the dust balance pipe 21 through a first connecting pipe 22 having a first sealing valve 24, the stirring machine 12 is connected to the dust balance pipe 21 through a second connecting pipe 23 having a second sealing valve 25, the dust balance pipe 21 is provided with a third sealing valve 26, a fourth sealing valve 27 and a fifth sealing valve 28, the third sealing valve 26 is located at a dust outlet of the dust balance pipe 21, the fourth sealing valve 27 is located between the first sealing valve 24 and the second sealing valve 25, and the fifth sealing valve 28 is located between the second sealing valve 25 and the powder buffer tank 13. The first sealing valve 24, the second sealing valve 25, the third sealing valve 26, the fourth sealing valve 27 and the fifth sealing valve 28 can all adopt pneumatic sealing valves, and specifically, the opening and closing of each segment of pipeline to be completed can be controlled by controlling the opening and closing of the pneumatic sealing valves.
Specifically, during the operation of weighing the powder, the first sealing valve 24 and the third sealing valve 26 can be opened, the other sealing valves can be closed, the pipeline between the loading scale bucket 11 and the dust remover 3 is communicated, so that the dust remover 3 removes dust from the loading scale bucket 11, during the operation of blanking the powder, the first sealing valve 24, the second sealing valve 25 and the fourth sealing valve 27 can be opened, the pipeline between the loading scale bucket 11 and the stirrer 12 is communicated, the powder conveying pipeline 5 is matched to form a constant pressure loop, during the operation of stirring the powder, the second sealing valve 25, the third sealing valve 26 and the fourth sealing valve 27 can be opened, the pipeline between the stirrer 12 and the dust remover 3 is communicated, so that the dust remover 3 removes dust from the stirrer 12, during the operation of inputting the powder into the powder buffer tank 13, the second sealing valve 25 and the fifth sealing valve 28 can be opened, the pipeline between the stirrer 12 and the powder buffer tank 13 is communicated, so that a constant pressure loop is formed, and smooth falling of the powder can be realized.
In the embodiment of the present invention, the dust removing device 2 further includes a settling mechanism 4 disposed between the dust-collecting balance pipe 21 and the first connecting pipe 22 and the third sealing valve 26, and the settling mechanism 4 is used for settling and collecting dust. The sedimentation mechanism 4 in the embodiment can perform dust removal operation after the dust with larger specific gravity in the air containing dust is pre-sedimentated by the sedimentation mechanism 4, so that the dust remover 3 only removes dust from the air containing dust with smaller specific gravity, the service life of a filter bag of the dust remover 3 can be prolonged, and the suction requirement and the use energy consumption of the dust remover 3 can be reduced.
As shown in fig. 6, in an embodiment, the settling mechanism 4 comprises a settling chamber 41 and an input pipe 43; the settling chamber 41 is used for settling and collecting dust, and the settling chamber 41 is provided with a vibrator 42 for driving the settling chamber 41 to vibrate so as to make the dust fall back; input tube 43 one end and the balanced pipe 21 that gathers dust are connected, and in the other end stretched into deposit room 41, and the pipe diameter of input tube 43 was less than deposit room 41's pipe diameter, and input tube 43 pipe lateral wall has seted up the feed back mouth, just feed back mouth and deposit room 41 intercommunication. The air containing dust entering the settling chamber 41 through the input pipe 43 suddenly increases in pipe diameter and suddenly decreases in flow speed, so that the dust settles and falls to be collected, the settling chamber 41 is driven by the vibrator 42 to vibrate to make the dust fall back, and the dust orderly flows through the settling chamber 41, the feed back port and the dust collection balance pipe 21 to fall back to the powder buffer tank 13 at preset time intervals, so that the dust collected by dust collection is recycled, the proportion of the components of the mixed powder is unchanged, the dust discharge amount can be reduced, and the service life of a filter bag of the dust collector 3 is prolonged. In another embodiment, the settling mechanism 4 is a spiral dust collector, and in other embodiments, the settling mechanism 4 can be selected according to practical requirements.
In the embodiment of the present invention, the settling chamber 41 includes a conical hopper 411 and a transition part 412 connected above the conical hopper 411, the lower end of the input pipe 43 is connected with the dust collection balance pipe 21, the upper end extends into the conical hopper 411, and the height of the input pipe 43 is lower than that of the conical hopper 411. In one embodiment, the inner surface of the cone 411 is covered with an anti-sticking layer, which can be a teflon-coated layer to prevent the settled dust from sticking.
In one embodiment, the powder mixing and dedusting system 100 further comprises an air supply fan 5 for supplying air to the powder buffer tank 13. The air supply fan 5 in this embodiment has a dryer, and after powder input powder buffer box 13 in this embodiment was accomplished, the volume of powder was exported to powder buffer box 13 according to the discharge opening of powder buffer box 13 and the air was replenished in powder buffer box 13, formed atmospheric pressure balance, guaranteed the smooth and easy output of powder, improved powder discharging efficiency. In other embodiments, the powder buffer tank 13 may be connected to the outside through an opening for pressure equalization.
In the embodiment of the present invention, the air supply fan 5 is connected to the powder buffer tank 13 through an air supply pipeline 52 having a sixth sealing valve 51. In the embodiment of the invention, the dust collector 3 is provided with the dust hood 31 with the air volume adjusting valve 32, and the dust hood 31 and the dust removing opening are arranged at opposite intervals and the intervals can be adjusted. Air regulation valve 32 in this embodiment can adopt manual regulation valve, adjusts the amount of wind and the suction size of tuber pipe through air regulation valve 32, and suction hood 31 and the relative interval setting of dust removal mouth can external air make-up get into, can eliminate 3 negative pressures of dust remover to weighing scale fill internal gas pressure influence, influence weighing precision.
In the description of the present invention, it is to be understood that the terms "first", "second" and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other way between two elements, unless expressly defined otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Moreover, various embodiments or examples and features of various embodiments or examples described in this specification can be combined and combined by one skilled in the art without being mutually inconsistent.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (12)
1. The powder mixing dedusting method is characterized by comprising the following steps:
step S1, arranging a loading scale bucket, a stirrer and a powder buffering box in sequence along the material flow direction, and connecting all the loading scale bucket, the stirrer and the powder buffering box in parallel to a dust collection balance pipe, and arranging a dust remover corresponding to a dust outlet of the dust collection balance pipe;
step S2, conveying powder into the loading scale bucket for powder weighing, communicating the dust collection balance pipe between the loading scale bucket and the dust remover and closing other pipelines, so that air containing dust in the loading scale bucket is sucked into the dust remover through the dust collection balance pipe;
step S3, after the powder is weighed, the powder falls into the stirrer to be subjected to powder blanking, the dust collection balance pipe between the loading scale hopper and the stirrer is communicated, and other pipelines are closed, so that air in the stirrer is backfilled into the loading scale hopper through the dust collection balance pipe to form air pressure balance;
step S4, after powder blanking is finished, starting the stirrer to stir the powder, communicating the dust collection balance pipe between the stirrer and the dust remover, and closing other pipelines to enable air containing dust in the stirrer to be sucked into the dust remover through the dust collection balance pipe;
and step S5, after the powder is stirred, conveying the powder into the powder cache box, communicating the dust collection balance pipe between the stirrer and the powder cache box and closing the dust collection balance pipe between the stirrer and the dust remover, so that air containing dust in the powder cache box enters the stirrer through the dust collection balance pipe and forms air pressure balance.
2. The method for dedusting and mixing powder lot of claim 1, wherein step S1 is preceded by disposing a settling mechanism for settling the dust at the dust outlet;
step S2 further comprises the step of enabling air containing dust in the feeding scale bucket to be sucked into the dust remover through the dust collection balance pipe after being settled by the settling mechanism;
and step S4, the method also comprises the step of sucking the air containing dust in the stirrer into the dust remover through the dust collection balance pipe after the air containing dust is settled by the settling mechanism.
3. The powder mixing dedusting method of claim 2, further comprising:
and step S6, after the powder is input into the powder cache box, communicating the dust collection balance pipe between the powder cache box and the dust remover according to a preset time interval and closing other pipelines, so that the dust collected in the settling mechanism falls back into the powder cache box.
4. The powder mixing dedusting method according to claim 1, further comprising:
and step S7, after the powder is input into the powder cache box, closing the dust collection balance pipe communicated between the stirrer and the powder cache box, and supplementing air into the powder cache box when a discharge hole of the powder cache box starts to discharge so as to enable the air pressure in the powder cache box to be balanced with the outside.
5. The powder mixing dedusting method of any one of claims 1 to 4, wherein step S2 is preceded by the steps of:
and adjusting the suction force of the dust remover according to the volume of the powder input into the loading scale hopper in unit time.
6. A powder mixing dedusting system, characterized in that the powder mixing dedusting system (100) comprises:
the powder circulating device (1) comprises a feeding scale hopper (11), a stirrer (12) and a powder buffering box (13) which are sequentially connected in series;
the dust removal device (2) comprises a dust collection balance pipe (21) and a dust remover (3) for removing dust from a dust outlet of the dust collection balance pipe (21), and the feeding scale hopper (11), the stirrer (12) and the powder buffering box (13) are connected in parallel to the dust collection balance pipe (21);
the inlet of the dust collection balance pipe (21) is connected with the powder buffer tank (13), the feeding scale bucket (11) is connected with the dust collection balance pipe (21) through a first connecting pipe (22) with a first sealing valve (24), the stirrer (12) is connected with the dust collection balance pipe (21) through a second connecting pipe (23) with a second sealing valve (25), the dust collection balance pipe (21) is provided with a third sealing valve (26), a fourth sealing valve (27) and a fifth sealing valve (28), the third sealing valve (26) is located at a dust outlet of the dust collection balance pipe (21), the fourth sealing valve (27) is located between the first sealing valve (24) and the second sealing valve (25), and the fifth sealing valve (28) is located between the second sealing valve (25) and the powder buffer tank (13).
7. The powder mixing dedusting system of claim 6, characterized in that the dedusting device (2) further comprises a settling mechanism (4) arranged in the dust collection balance pipe (21) and between the first connecting pipe (22) and the third sealing valve (26), wherein the settling mechanism (4) is used for settling dust and collecting dust.
8. The powder mixing dedusting system of claim 7, characterized in that the settling mechanism (4) comprises:
the settling chamber (41) is used for settling and collecting dust, and the settling chamber (41) is provided with a vibrator (42) which is used for driving the settling chamber (41) to vibrate so as to enable the dust to fall back;
input tube (43), one end with balance tube (21) of gathering dust connects, and the other end stretches into in deposit room (41), just the pipe diameter of input tube (43) is less than the pipe diameter of deposit room (41), input tube (43) with the feed back mouth has been seted up to the pipe lateral wall of deposit room (41) inner wall junction, just the feed back mouth with deposit room (41) intercommunication.
9. The powder mixing dust removing system of claim 8, wherein the settling chamber (41) comprises a cone (411) and a transition part (412) connected above the cone (411), the lower end of the input pipe (43) is connected with the dust collection balance pipe (21), the upper end of the input pipe extends into the cone (411), and the height of the input pipe (43) is lower than that of the cone (411).
10. The powder mixing dedusting system according to any one of claims 6 to 9, wherein the powder mixing dedusting system (100) further comprises an air supply fan (5) for supplying air to the powder buffer tank (13).
11. The powder mixing dedusting system of claim 10, characterized in that the air supply fan (5) is connected to the powder buffer tank (13) through an air supply pipeline (52) with a sixth sealing valve (51).
12. The powder mixing dedusting system of any one of claims 6 to 9, wherein a dust hood (31) with an air volume adjusting valve (32) is installed on the connecting air pipe of the deduster (3), and the dust hood (31) and the dedusting port are oppositely arranged at intervals.
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Address after: 410013 third floor, 101 office building, Hunan aoshengte Heavy Industry Technology Co., Ltd., No. 569, Dongfanghong Road, high tech Development Zone, Changsha, Hunan Patentee after: Zoomlion New Material Technology Co.,Ltd. Address before: 410013 third floor, 101 office building, Hunan aoshengte Heavy Industry Technology Co., Ltd., No. 569, Dongfanghong Road, high tech Development Zone, Changsha, Hunan Patentee before: Hunan Zoomlion New Material Technology Co.,Ltd. |