An ultrafine powder feeding and packaging integrated production system and method

Abstract

The application discloses an ultrafine powder feeding, packaging and integrated production system, which comprises a rack, a long-distance negative pressure feeding system, a screening system, a packaging system and a control system, wherein the long-distance negative pressure feeding system, the screening system and the packaging system are connected with the control system; the long-distance negative pressure feeding system comprises a material furnace, a feeding bin, a feeding pipeline, two material collecting bins, two dust removal devices, a negative pressure fan, an air extraction pipeline and a first bin; the ultrafine powder is discharged from the material furnace, enters the feeding bin, and is transported to the material collecting bin by the negative pressure fan, the air extraction pipeline and the feeding pipeline. The application provides an ultrafine powder feeding, packaging and integrated production system and method, solves the long-distance feeding problem through the long-distance negative pressure feeding system, heats the wall of the material collecting bin, solves the problem that the ultrafine powder is easy to stick to the wall, adopts double-material collecting bin normal-pressure unloading, and thus the purpose of fast powder settlement is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to superfine powder feeding and packaging integrated production system and method. BACKGROUND

[0002] Superfine powder has light density and fine granularity, generally more than 100 mesh, such as activated carbon powder, zinc oxide powder, carbon black powder and the like. During the packaging process, the following problems may occur: 1. When the material is collected in the collection bin, the negative pressure suction of the air feeding system cannot be timely discharged; 2. When the powder is transported at a high temperature, the powder is easily condensed and coagulated. SUMMARY

[0003] In order to overcome the defects of the prior art, the present application provides a superfine powder feeding and packaging integrated production system, which solves the problem of long-distance feeding by using a long-distance negative pressure feeding system, solves the problem of easy condensation and coagulation of superfine powder by heating the wall of the material collection bin, and achieves the purpose of rapid settling of the powder by using double material collection bins for normal pressure discharge.

[0004] The technical scheme adopted by the present application to solve the technical problems is as follows:

[0005] A superfine powder feeding and packaging integrated production system, comprising a rack, a long-distance negative pressure feeding system, a screening system, a packaging system and a control system, wherein the long-distance negative pressure feeding system, the screening system and the packaging system are connected with the control system;

[0006] The long-distance negative pressure feeding system comprises a material furnace, a feeding bin, a feeding pipeline, two material collection bins, two dust removal devices, a negative pressure fan, an air extraction pipeline and a first bin, the discharge port of the material furnace is connected with the feeding port of the feeding bin, the discharge port of the feeding bin is connected with one end of the feeding pipeline through an adjustable valve, the other end of the feeding pipeline is communicated with the feeding ports of the two material collection bins through collection bin feeding valves, the two dust removal devices are respectively installed in the upper parts of the two material collection bins, the negative pressure fan is connected with one end of the air extraction pipeline, the other end of the air extraction pipeline is communicated with the top parts of the two material collection bins through air extraction valves, and a total valve is further arranged on the air extraction pipeline; the top parts of the two material collection bins are respectively provided with a vent valve; the first bin is arranged below the material collection bin, and the discharge port of the material collection bin is connected with the feeding port of the first bin through a collection bin discharge valve;

[0007] The feeding and discharging of the two material collection bins are cross and staggered, the first bin is provided with a stirring device, and the screening system is arranged between the first bin and the packaging system;

[0008] The superfine powder comes out from the material furnace, enters the feeding bin, is transported to the material collecting bin by negative pressure through the negative pressure fan, the air extraction pipeline and the feeding pipeline, the gas is isolated from the powder by the dust removal equipment in the material collecting bin, and the gas is extracted by the negative pressure fan; the pressure in the material collecting bin reaches normal pressure by temporarily stopping air extraction and rapidly entering air, so that the superfine powder can timely fall to the discharge port of the material collecting bin and finally enter the first bin; then, screening is performed through the screening system, and then packaging is completed through the packaging system.

[0009] Further, the heater is wrapped on the outer wall of the material collecting bin, the material collecting bin is heated by the heater while the gas is extracted by the negative pressure fan, so as to prevent the superfine powder from condensation, adhesion and sticking to the inner wall of the material collecting bin or the dust removal equipment.

[0010] Still further, the screening system comprises two screening units, each screening unit comprises an airflow screening machine and a second bin, the airflow screening machine is located between the first bin and the second bin, the discharge port of the airflow screening machine is connected with the discharge port of the first bin, the fine material discharge port of the airflow screening machine is connected with the feeding port of the second bin, the second bin is further provided with a stirring device, and the coarse material discharge port of the airflow screening machine is connected with the coarse material collecting bin.

[0011] Still further, the packaging system comprises two packaging modules, the packaging modules are located below the second bins, and the two packaging modules correspond to the two second bins respectively.

[0012] Still further, the dust removal equipment is a bag dust removal equipment or a filter cartridge dust removal equipment.

[0013] Still further, the stirring device is a screw stirring machine.

[0014] A production method of a superfine powder feeding and packaging integrated production system comprises the following steps:

[0015] The superfine powder comes out from the material furnace, enters the feeding bin, is transported to the material collecting bin by negative pressure through the negative pressure fan, the air extraction pipeline and the feeding pipeline, the gas is isolated from the powder by the dust removal equipment in the material collecting bin, and the gas is extracted by the negative pressure fan; the pressure in the material collecting bin reaches normal pressure by temporarily stopping air extraction and rapidly entering air, so that the superfine powder can timely fall to the discharge port of the material collecting bin and finally enter the first bin; then, screening is performed through the screening system, and then packaging is completed through the packaging system.

[0016] The beneficial effects of the application mainly include:

[0017] 1. For the material with high temperature from the material furnace, a wrapping heater is designed on the material collecting bin wall to heat the material collecting bin wall, so that the gas temperature in the material collecting bin is above the condensation point, thereby solving the problem that the ultrafine powder is originally at a certain temperature, the energy exchange is exchanged through air conveying, and the volume changes after reaching the material collecting bin, which causes the temperature to drop to the gas condensation point, the water is analyzed out, and the ultrafine powder is agglomerated and bonded on the material collecting bin wall, which is not easy to sink to the bottom;

[0018] 2. For the long-distance negative pressure suction conveying of the ultrafine powder, double material collecting bins are adopted, one material collecting bin is used for feeding, and the other material collecting bin is used for discharging. In order to quickly achieve the purpose of discharging, the vent valve at the top of the material collecting bin is opened, and the air extraction valve is closed. In this way, when discharging, the external air enters, and the air in the material collecting bin quickly reaches the normal pressure, so that the purpose of quick sedimentation of the powder is achieved. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a production system structure schematic diagram of the present application.

[0020] Figure 2 is a side view of Figure 1 . DETAILED DESCRIPTION

[0021] The present application will be further described below in combination with the drawings.

[0022] Referring to Figure 1 and Figure 2 , an ultrafine powder feeding and packaging integrated production system comprises a rack 1 and a long-distance negative pressure conveying feeding system, a screening system, a packaging system and a control system 6. The long-distance negative pressure conveying feeding system, the screening system and the packaging system are all connected with the control system 6.

[0023] The long-distance negative pressure conveying feeding system comprises a material furnace 21, a feeding bin 22, a feeding pipeline 24, two material collecting bins, two dust removal devices 27, a negative pressure fan 28, an air extraction pipeline 29 and a first bin 30. The discharge port of the material furnace 21 is connected with the feeding port of the feeding bin 22. The discharge port of the feeding bin 22 is connected with one end of the feeding pipeline 24 through an adjustable valve 23. The other end of the feeding pipeline 24 is communicated with the feeding ports of the two material collecting bins through collecting bin feeding valves. The two dust removal devices 27 are respectively installed in the upper parts of the two material collecting bins. The negative pressure fan 28 is connected with one end of the air extraction pipeline 29. The other end of the air extraction pipeline 29 is communicated with the tops of the two material collecting bins through air extraction valves. Meanwhile, a total valve 33 is arranged on the air extraction pipeline 29. One vent valve is respectively arranged on the top of each of the two material collecting bins. The first bin 30 is arranged below the material collecting bins. The discharge port of the material collecting bin is connected with the feeding port of the first bin 30 through a collecting bin discharge valve.

[0024] The feeding and discharging of the two material collecting bins are cross and staggered, the first bin 30 is provided with a stirring device, and the screening system is arranged between the first bin 30 and the packaging system.

[0025] The superfine powder is discharged from the material furnace 21, enters the feeding bin 22, is transported to the material collecting bin by negative pressure through the negative pressure fan 28, the air extraction pipeline 29 and the feeding pipeline 24, the gas is separated from the powder by the dust removal equipment in the material collecting bin, and the gas is extracted by the negative pressure fan 28; the pressure in the material collecting bin reaches normal pressure by temporarily stopping air extraction and rapidly entering air, so that the superfine powder can timely fall to the discharge port of the material collecting bin and finally enter the first bin 30; then the superfine powder is screened by the screening system and then reaches the packaging system to complete packaging.

[0026] Further, the material collecting bin is further wrapped with a heater 20, the material collecting bin is heated by the heater 20 while the gas is extracted by the negative pressure fan 28, so as to prevent the superfine powder from condensing, coagulating and adhering to the inner wall of the material collecting bin or the dust removal equipment 27.

[0027] Further, the screening system comprises two screening units, each screening unit comprises an air flow screening machine and a second bin, the air flow screening machine is arranged between the first bin 30 and the second bin, the feeding port 40 of the air flow screening machine is connected with the discharge port of the first bin 30, the fine material discharge port 45 of the air flow screening machine is connected with the feeding port of the second bin, the second bin is further provided with a stirring device, and the coarse material discharge port 46 of the air flow screening machine is connected with a coarse material collecting bin.

[0028] Further, the packaging system comprises two packaging modules, the packaging modules are arranged below the second bins, and the two packaging modules correspond to the two second bins respectively. Each packaging module comprises a bin, a dust removal device, a weighing device for weighing the powdery activated carbon in the bin, a vacuum extraction device and a bag clamping mechanism.

[0029] The specific structure of the packaging module refers to the related contents of the patent with the patent number 2016212275156. Of course, the packaging module can also adopt the contents of the packaging unit of the patent with the patent number 2018109670562.

[0030] Further, the dust removal equipment is a bag dust removal equipment or a filter cartridge dust removal equipment. The bag dust removal equipment adopts pulse blowing ash removal technology.

[0031] Further, the stirring device is a screw type stirrer.

[0032] As Figure 1As shown, the collection bin feed valve, the exhaust valve, the total valve 33, the vent valve are butterfly valves; the collection bin discharge valve is a butterfly valve or a air lock.

[0033] The heating of the material collection bin can be electrically controlled heating of a silicon rubber heating plate attached to the steel plate wall of the material collector, or the steel plate wall of the material collector can be equipped with heat exchange pipes, the temperature of the medium in the pipes is controlled to achieve heat exchange between the heat exchange pipes and the steel plate wall of the material collection bin, thereby achieving the purpose of maintaining a certain temperature in the material collection bin.

[0034] The feeding process of the long-distance negative pressure feeding and loading system: the superfine powder falls freely from the discharge port of the material furnace 21 to the feeding bin 22, the amount of discharge of the feeding bin 22 is adjusted by the adjustable valve 23, the negative pressure generated by the negative pressure fan 28 sucks the superfine powder from the feeding bin 22 through the feeding pipeline 24 into the material collection bin, and then the material is left through the dust removal equipment 27, the gas continues to enter the negative pressure fan 28 through the exhaust pipeline 29, and finally is discharged.

[0035] When the first material collection bin 25 is fed, the vent valve 36 and the collection bin discharge valve 38 are closed, the total valve 33, the exhaust valve 34 and the collection bin feed valve 31 are opened, the negative pressure fan 28 performs exhaust on the first material collection bin 25 through the exhaust pipeline 29, the negative pressure causes the superfine powder to be sucked into the first material collection bin 25, then the powder is isolated by the dust removal equipment 27, at the same time, the gas is sucked out by the negative pressure fan 28, the first material collection bin 25 is heated by the heater 20, so that the superfine powder can fall in time to the discharge port at the bottom of the material collection bin;

[0036] When the second material collection bin 26 is fed, the vent valve 37 and the collection bin discharge valve 39 are closed, the total valve 33, the exhaust valve 35 and the collection bin feed valve 32 are opened, the negative pressure fan performs exhaust on the second material collection bin 26 through the exhaust pipeline, the negative pressure causes the superfine powder to be sucked into the second material collection bin 26, then the powder is isolated by the dust removal equipment 27, at the same time, the gas is sucked out by the negative pressure fan 28, the second material collection bin 26 is heated by the heater 20, so that the superfine powder can fall in time to the discharge port at the bottom of the material collection bin; at the same time, the first material collection bin 25 is unloaded, i.e. the vent valve 36 and the collection bin discharge valve 38 are opened, the exhaust valve 34 and the collection bin feed valve 31 are closed, and finally the superfine powder enters the first bin 30;

[0037] When the first material collection bin 25 is fed, at the same time, the second material collection bin 26 is unloaded, i.e. the vent valve 37 and the collection bin discharge valve 39 are opened, the exhaust valve 35 and the collection bin feed valve 32 are closed, and finally the superfine powder enters the first bin 30;

[0038] The feeding and discharging of the first material collecting bin 25 and the second material collecting bin 26 are staggered, that is, when the first material collecting bin 25 is feeding, the second material collecting bin 26 is discharging, and when the first material collecting bin 25 is discharging, the second material collecting bin 26 is feeding.

[0039] The height, diameter and other related parameters of the feeding bin 22 and the feeding pipeline 24 are generally determined by comprehensive calculation of the conveying capacity, installation space, negative pressure conveying capacity provided by the equipment and the like.

[0040] Screening process of the screening system:

[0041] The screening machine of each screening unit can be an airflow screening machine or a vibrating screening machine. The airflow screening machine 41 of the first screening unit is connected with the left second bin 43, and the airflow screening machine 42 of the second screening unit is connected with the right second bin 44. After the superfine powder is screened by the airflow screening machine, the fine powder enters the second bin, and the coarse powder enters the coarse powder collecting bin.

[0042] Packaging of the packaging system:

[0043] The packaging module 51 corresponds to the left second bin 43, the packaging module 52 corresponds to the right second bin 44, and the screened fine powder enters the packaging module through the second bin for packaging.

[0044] The production method of the production system of the application is as follows:

[0045] The long-distance negative pressure conveying feeding system, the screening system and the packaging system are controlled by the control system, and the control system adopts a PLC electric control box.

[0046] Negative pressure conveying of the material: The superfine powder is discharged from the material furnace 21, enters the feeding bin 22, is sucked into the material collecting bin through the negative pressure fan 28, the air suction pipeline 29 and the feeding pipeline 24, and then falls into the bottom of the material collecting bin. The superfine powder enters the first bin 30 through the collecting bin discharge valve 38 or the collecting bin discharge valve 39, the gas passes through the bag dust removal equipment or the filter cartridge dust removal equipment in the material collecting bin to isolate the powder, and the gas is sucked out by the negative pressure fan 28. For the superfine powder with a certain temperature, in order to prevent condensation, the material collecting bin is heated by the wrapping heater 20 on the wall of the material collecting bin, so as to prevent the superfine powder with a certain temperature from condensing and coagulating in the material collecting bin, and adhering to the inner wall of the material collecting bin or the dust removal equipment 27. The pressure in the material collecting bin is raised to normal pressure by temporarily stopping air suction and rapidly entering air, so that the superfine powder can timely fall to the discharge port of the material collecting bin.

[0047] Screening of the material: The superfine powder in the material collecting bin enters the first bin, the superfine powder in the first bin is stirred by the stirring device and enters the screening system, and the airflow screening machine screens the required material into the second bin.

[0048] The packaging material:

[0049] The screened fine material enters the second stock bin, is stirred by the stirring device in the second stock bin, enters the packaging system, and is dedusted and packaged by the packaging module.

[0050] For a long distance and a large conveying amount, such as more than 1 ton per hour of superfine powder, a distance of more than 100 meters, a negative pressure suction type material conveying mode is adopted, which can cause a high negative pressure in the material collecting bin, reaching about 20 KP, which can cause a slow powder material sedimentation speed, and cannot meet the requirement of continuous operation of the enterprise production line. Since continuous operation, the material collecting bin capacity cannot be increased to meet the requirement. Therefore, the present application adopts double material collecting bins for alternate feeding and discharging, and through temporary stopping of air suction and rapid air entry, the pressure in the material collecting bin reaches normal pressure, so that the superfine powder can timely fall, thereby meeting the requirement of continuous production and conveying operation.

[0051] The advantage of negative pressure conveying is that, compared with positive pressure conveying, if sealing is not good, powder material will not overflow immediately as in positive pressure conveying, and the whole workshop will be full of powder.

Claims

1. An integrated production system for feeding and packaging ultrafine powder, characterized in that: The machine frame is connected with a long-distance negative pressure conveying feeding system, a screening system, a packaging system and a control system; The long-distance negative pressure conveying feeding system comprises a material furnace, a feeding bin, a feeding pipeline, two material collecting bins, two dust removal devices, a negative pressure fan, an air extraction pipeline and a first bin, the material outlet of the material furnace is connected with the feeding inlet of the feeding bin, the feeding outlet of the feeding bin is connected with one end of the feeding pipeline through an adjustable valve, the other end of the feeding pipeline is communicated with the feeding inlets of the two material collecting bins through collecting bin feeding valves, the two dust removal devices are respectively installed in the upper parts of the two material collecting bins, the negative pressure fan is connected with one end of the air extraction pipeline, the other end of the air extraction pipeline is communicated with the top parts of the two material collecting bins through air extraction valves, meanwhile, a total valve is arranged on the air extraction pipeline, and an air release valve is arranged on the top part of each material collecting bin; the first bin is arranged below the material collecting bin, and the feeding outlet of the material collecting bin is connected with the feeding inlet of the first bin through a collecting bin feeding valve. When the first material collecting bin is fed, the air release valve and the collecting bin feeding valve of the first material collecting bin are closed, the total valve, the air extraction valve and the collecting bin feeding valve of the first material collecting bin are opened, the second material collecting bin is unloaded, the air release valve and the collecting bin feeding valve of the second material collecting bin are opened, and the air extraction valve and the collecting bin feeding valve of the second material collecting bin are closed; when the second material collecting bin is fed, the air release valve and the collecting bin feeding valve of the second material collecting bin are closed, the total valve, the air extraction valve and the collecting bin feeding valve of the second material collecting bin are opened, the first material collecting bin is unloaded, the air release valve and the collecting bin feeding valve of the first material collecting bin are opened, the air extraction valve and the collecting bin feeding valve of the first material collecting bin are closed, and the feeding and unloading of the two material collecting bins are cross and staggered; the first bin is provided with a stirring device, and the screening system is arranged between the first bin and the packaging system. The superfine powder is conveyed into the material collecting bin through the negative pressure fan, the air extraction pipeline and the feeding pipeline, the gas is separated from the powder by the dust removal device in the material collecting bin, and the gas is extracted by the negative pressure fan; the pressure in the material collecting bin reaches the normal pressure by temporarily stopping air extraction and rapidly entering air, so that the superfine powder can timely fall to the feeding outlet of the material collecting bin and finally enter the first bin; then, the superfine powder is screened through the screening system and then reaches the packaging system to complete packaging.

2. The system of claim 1, wherein the system further comprises a packaging device. The material collecting bin is wrapped with a heater, the material collecting bin is heated by the heater while the gas is extracted by the negative pressure fan, so as to prevent the superfine powder from condensing, coagulating and adhering to the inner wall of the material collecting bin or the dust removal device.

3. The system of claim 1 or 2, wherein the system further comprises a drying device. The screening system comprises two screening units, each screening unit comprising an air flow screening machine and a second bin, the air flow screening machine being located between the first bin and the second bin, the air flow screening machine being connected with the first bin at the material outlet of the first bin, the air flow screening machine being connected with the second bin at the material inlet of the second bin, the second bin being further provided with a stirring device, and the air flow screening machine being connected with the coarse material collecting bin at the coarse material outlet of the air flow screening machine.

4. The system of claim 1 or 2, wherein the system further comprises a powder packaging device. The packaging system comprises two packaging modules, the packaging modules being located below the second bins, and the two packaging modules corresponding to the two second bins respectively.

5. The system of claim 2, wherein the system further comprises a packaging device. The heater is a silicon rubber heating plate or a heat exchange pipe.

6. The system of claim 2, wherein the system further comprises a packaging device. The dust removal equipment is a cloth bag dust removal equipment or a filter cartridge dust removal equipment.

7. The system of claim 3, wherein the system further comprises a packaging device. The stirring device is a screw stirring machine.

8. A production method of the production system according to claim 1, characterized by: The production method comprises the following steps: superfine powder is discharged from a material furnace, enters a feeding bin, is transported to a material collecting bin by a negative pressure fan, an air extraction pipeline and a feeding pipeline, gas is separated from the superfine powder by dust removal equipment in the material collecting bin, the gas is extracted by the negative pressure fan, the material collecting bin is heated by a heater to prevent the superfine powder from condensing, coagulating and adhering to the inner wall of the material collecting bin or the dust removal equipment, the pressure in the material collecting bin is brought to normal pressure by temporarily stopping air extraction and rapidly entering air, so that the superfine powder can timely fall to the material outlet of the material collecting bin and finally enter the first bin, then the superfine powder is screened by a screening system and then is packaged by a packaging system.

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