KR102532786B1 - Carrying system for powdered article - Google Patents

Abstract

The present invention relates to a powder transport system, comprising: a powder transport connection pipe serially connected to a powder transport pipe for transporting powder stored in a powder storage tank; and an air compressor for generating compressed air for transport supplied to the powder transport pipe; And, a heat exchanger connected to the air compressor to cool the compressed air for transport; And, a compression tank for storing the compressed air for transport supplied from the heat exchanger and discharging it at a constant pressure; And, connected to the compression tank of A compressed air transport pipe connected to the powder transport connection pipe so that compressed air for transportation is sent to the powder transport pipe; the heat exchanger is heated to a temperature range of 180 ° C to 200 ° C by the compression heat of the air compressor and the engine operating heat The compressed air for transportation is reduced to a temperature in the range of 100 ° C to 120 ° C and supplied to a compression tank, and the compression tank reduces the temperature of the compressed air for transportation to a temperature in the range of 90 ° C to 100 ° C, which is a temperature at which powder is not carbonized, at a constant pressure. It is characterized in that the cooling jacket is externally supplied so that it is continuously supplied to the inside of the powder transfer pipe.

Description

Powder transport system {CARRYING SYSTEM FOR POWDERED ARTICLE}

The present invention relates to a powder conveying system capable of preventing transportation delay or clogging due to agglomeration and sticking of powders transported through compressed air for transportation, and more particularly, to an engine heat of an air compressor, The high-temperature compressed air for transportation generated by the compression heat is firstly cooled through a heat exchanger, and secondarily reduced to a temperature in the range of 90 ℃ to 100 ℃, which is a temperature at which powder is not carbonized, through a compression tank, and continuously supplied to the powder transfer pipe. It relates to a powder conveying system that allows

Generally, a powder conveying device for conveying powder is used for various purposes. Here, the powder includes a fine particle material in a powdery state or a raw material in a granular form.

The powder transfer device is classified in various ways according to the type of powder, transfer amount, transfer time, and surrounding conditions. For example, the powder conveying device includes a pressure conveying type powder conveying device, a coil spring type powder conveying device, a powder conveying member type powder conveying device, and the like.

The pressure feed type powder transport device is a device for transporting a certain distance by supplying high-pressure air through a nozzle, and has the advantage of being capable of long-distance transport.

However, in the pressure-feeding type powder transport device, when the temperature of the high-pressure air transporting the powder is 80 ° C or less, the powder is agglomerated due to wetness, and when the temperature is 100 ° C or more, the powder is carbonized.

Accordingly, it is necessary to continuously supply compressed air at 80 ° C to 100 ° C. In this case, a large-capacity air compressor is required.

However, when a large-capacity air compressor is supplied, a heat exchanger capable of heating and cooling the temperature of the air generated by the engine operation heat and the air compression heat to a temperature range of 180 ° C to 200 ° C is required.

Conventional heat exchangers are configured by bundling a plurality of coolant pipes having small inner diameters. When scale is generated inside these coolant pipes, clogging occurs, resulting in a rapid drop in cooling efficiency.

In addition, in order to efficiently transport the powder, it is necessary to remove the wetness of the powder and scatter the powder at the same time. Generally, when the powder is partially adhered to the powder transfer pipe, the scattering efficiency of the powder rapidly decreases.

Republic of Korea Patent No. 10-1388405

The present invention has been made in view of the above problems, and the first object of the present invention is to prevent powders transported through compressed air for transportation from being delayed or clogged due to agglomeration and sticking due to wetness. It is to provide a powder conveying system.

A second object of the present invention is to firstly reduce the temperature of the engine heat of the air compressor and the high-temperature compressed air for transportation generated by the compression heat through a heat exchanger, and secondarily to a temperature of 90, which is a temperature at which powder is not carbonized through a compression tank. It is an object of the present invention to provide a powder transport system capable of continuously supplying the powder to a powder transfer pipe by reducing the temperature in the range of ℃ to 100 ℃.

According to a feature for achieving the above object, a first invention relates to a powder transport system, which is connected in series to a powder transfer pipe for transporting powder stored in a powder storage tank; and An air compressor that generates compressed air for transport supplied to the powder transfer pipe; and a heat exchanger that is connected to the air compressor to cool the compressed air for transport; and stores the compressed air for transport supplied from the heat exchanger at a constant pressure. A compression tank for discharging; and a compressed air transport pipe connected to the compression tank and connected to the powder transport connection pipe so that compressed air for transportation is sent to the powder transport pipe. Compressed air for transport heated to a temperature range of 180 ° C to 200 ° C by heat and engine operating heat is reduced to a temperature range of 100 ° C to 120 ° C and supplied to a compression tank, and the compression tank supplies compressed air for transportation to a temperature at which powder is not carbonized A cooling jacket is externally supplied so that a constant pressure is continuously supplied to the inside of the powder transfer pipe in a state in which the temperature is reduced in the range of 90 ℃ to 100 ℃, and the powder transfer connection pipe has a spiral portion that generates a spiral vortex along the powder transfer direction on the inner circumferential surface of one side. Partially formed on one side, characterized in that the rubber corrugated portion is further formed on both sides.

In the second invention, in the first invention, the heat exchanger has an inner tube having a first inlet and a first outlet so that the high-temperature compressed air for transport generated by the air compressor can be de-energized and discharged, and the cooling tower is external to the inner tube. It is characterized in that it consists of an outer cylinder formed with a second inlet and a second outlet to circulate the cooling water stored in the.

In the third invention, in the second invention, a plurality of first baffles arranged in a zigzag pattern are formed inside the inner cylinder to delay the discharge of the compressed air for transport that has flowed in, and the cooling water is discharged between the outer cylinder and the inner cylinder. It is characterized in that a plurality of second baffles are formed in a zigzag manner so as to delay and exchange heat with compressed air for transportation.

In the fourth invention, in the third invention, the second baffle is formed in an inclined shape in the flow direction of the coolant to prevent the internal pressure from increasing, and a plurality of hemispherical grooves are formed on the surface to generate vortexes, so that scale is formed inside. It is characterized in that it is made to prevent this from occurring.

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In the sixth invention, in the first invention, the compressed air transport pipe is connected in a tangential direction to the front of the spiral portion of the powder transport connection pipe, and is expanded from the first transport pipe to the rear of the spiral portion. It is characterized in that it is configured by branching into a second transport pipe connected in an inclined direction.

According to the powder transport system of the present invention, there is an advantage in that the engine heat of the air compressor and the high-temperature compressed air for transportation generated by the compression heat can be effectively reduced in temperature through the heat exchanger and the cooling jacket.

In addition, by branching the compressed air transport pipe into a first transport pipe forming a spiral air flow and a second transport pipe allowing the spiral air flow to continue over a long distance, there is an effect of increasing powder transport efficiency.

1 is a block diagram of a powder conveying system according to the present invention;
2 is a flow chart showing the flow of compressed air, cooling water, and powder in the powder conveying system of FIG. 1;
3 and 4 are perspective and cross-sectional views of the heat exchanger extracted from FIG. 1;
5 is a block diagram showing a powder transport connection pipe extracted from FIG. 1 and a compressed air transport pipe connected to the powder transport connection pipe.

Objects, other objects, features and advantages of the present invention below will be easily understood through the following preferred embodiments in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments described herein and may be embodied in other forms.

Rather, the embodiments introduced herein are provided so that the disclosed content will be thorough and complete and the spirit of the present invention will be sufficiently conveyed to those skilled in the art.

Embodiments described and illustrated herein also include complementary embodiments thereof.

In this specification, singular forms also include plural forms unless specifically stated otherwise in a phrase. The terms 'comprise' and/or 'comprising' used in the specification do not exclude the presence or addition of one or more other elements.

Hereinafter, the present invention will be described in detail with reference to the drawings. In describing the specific embodiments below, various specific details have been prepared to more specifically describe the invention and aid understanding. However, readers who have knowledge in this field to the extent that they can understand the present invention can recognize that it can be used without these various specific details. In some cases, it is mentioned in advance that parts that are commonly known in describing the invention and are not greatly related to the invention are not described in order to prevent confusion in describing the present invention.

Hereinafter, a powder conveying system according to the present invention will be described in detail together with the accompanying drawings.

1 is a block diagram of a powder transport system according to the present invention, FIG. 2 is a flowchart showing the flow of compressed air, cooling water, and powder in the powder transport system of FIG. 1, and FIGS. 3 and 4 are excerpts from FIG. FIG. 5 is a configuration diagram showing a powder transport connection pipe extracted from FIG. 1 and a compressed air transport pipe connected to the powder transport connection pipe.

As shown in FIGS. 1 to 5, the present invention is a powder transport system 100 that can prevent transport delay or clogging due to agglomeration and sticking caused by wetness of powder transported through compressed air for transport. It is about.

The powder transport system 100 of the present invention primarily reduces the temperature of the engine heat of the air compressor 20 and the high-temperature compressed air for transportation generated by the compression heat through a heat exchanger, and secondarily the compression tank 40 Through this, the temperature is reduced to a temperature in the range of 90 ° C. to 100 ° C., which is a temperature at which powder is not carbonized, so that it can be continuously supplied to the powder transfer pipe 300.

The powder transport system 100 of the present invention is largely composed of five parts, which include a powder transport connection pipe 10, an air compressor 20, a heat exchanger 30, a compression tank 40, and compressed air It is composed of a transport pipe (50).

The powder transport connection pipe 10 has a structure connected in series to the powder transport pipe 300 transporting the powder stored in the powder storage tank 200.

The air compressor 20 has a large capacity to continuously generate compressed air for transport, and functions to generate compressed air for transport supplied to the powder transport pipe 300.

Compressed air for transportation generated in such a large air compressor 20 is typically heated to a temperature range of 180° C. to 200° C. by compression heat and engine operating heat.

In the heat exchanger 30, when compressed air for transport heated to 180 ° C to 200 ° C is supplied to the powder transfer pipe 300, the powder may be carbonized, so the first temperature reduction is performed in the temperature range of 100 ° C to 120 ° C (cooling) functions.

Here, as shown in FIGS. 3 and 4, the heat exchanger 30 crosses the compressed air for transport and the cooling water to finally reduce the temperature of the compressed air for transport, and the high temperature generated in the air compressor 20 is compressed for transport. An inner cylinder 31 in which a first inlet 312 and a first outlet 313 are formed so that air can be cooled and discharged, and a cooling water external to the inner cylinder 31 and stored in the cooling tower 60 can be circulated. It consists of an outer cylinder 32 in which two inlets 322 and a second outlet 323 are formed.

Here, a plurality of first baffles 311 arranged in a zigzag pattern are formed inside the inner cylinder 31 to delay the discharge of the introduced compressed air for transportation.

And, between the outer cylinder 32 and the inner cylinder 31, a plurality of second baffles 321 arranged in a zigzag pattern are formed to delay the discharge of cooling water and exchange heat with compressed air for transportation.

At this time, the second baffle 321 is formed in an inclined shape in the flow direction of the cooling water to prevent the internal pressure from increasing, and a plurality of hemispherical grooves 321a generating vortexes are formed on the surface to generate scale inside. made to prevent this from happening.

Here, a first temperature sensor T for measuring the temperature of the reduced compressed air for transport may be provided at the first outlet 313 of the inner cylinder 31 .

In addition, a solenoid valve (V) capable of adjusting the amount of cooling water is connected to the second inlet 322 of the outer cylinder 32, so that the inflow amount of cooling water can be adjusted according to the temperature of the compressed air for transportation of the first temperature sensor (T). can be configured.

In addition, the compression tank 40 stores the compressed air for transportation discharged through the first discharge port 313 and discharges it at a certain pressure, and also functions to reduce the temperature of the compressed air for transportation secondarily.

More specifically, the compression tank 40 reduces the temperature of the compressed air for transportation to a temperature in the range of 90 ° C to 100 ° C, which is a temperature at which powder is not carbonized, in consideration of -10 ° C heat loss, and the powder transfer pipe 300 at a constant pressure It functions so that it is continuously supplied to the inside of the

The compression tank 40 may also have a third inlet 42 connected to the first outlet 313 and a third outlet 43 for discharging the stored compressed air for transportation.

In addition, the compression tank 40 may be configured to include a cooling jacket 41 through which cooling water is circulated along with a pressure gauge 44 and a temperature sensor T, and the amount of compressed air for transportation is supplied to the third outlet 43. The controlling solenoid valve (V) may be connected and configured.

In addition, the compression tank 40 may be configured to receive cooling water by branching a cooling water circulation line connected to the outer cylinder 32 of the heat exchanger 30 .

On the other hand, as shown in FIG. 5, the powder transfer connector 10 has a spiral part 11 that generates a spiral vortex along the powder transfer direction on one side of the inner circumferential surface, and a rubber corrugated pipe 12 is further formed on both sides. can be configured.

The compressed air transport pipe 50 is connected to the third outlet 43 of the compression tank 40, and is connected to the powder transport connection pipe 10 so that compressed air for transportation is sent to the powder transport pipe 300. .

And the compressed air transport pipe 50 is connected to the compression tank 40, and a first transport pipe 51 connected in a tangential direction to the front of the spiral portion 11 of the powder transport connection pipe 10 And, the second transport pipe 52, which is expanded from the first transport pipe 51 and connected in an inclined direction to the rear of the spiral portion 11, is configured to branch.

Here, since the inner diameter of the first transport pipe 51 is relatively smaller than that of the second transport pipe 52, the pressure of the supplied compressed air for transportation is lowered and the supply speed is increased more rapidly.

Accordingly, the compressed air for transport supplied through the first transport pipe 51 is quickly turned and supplied, and the supplied compressed air for transport passes through the spiral part 11 to continue the swirling air flow so that the powder can be scattered. do.

At this time, the powder transport connection pipe 10 is vibrated by the swirling air flow, and this vibration can further spread the scattering of the powder.

In addition, the vibration generated in the powder transfer pipe 10 can be prevented from being transmitted to the powder transfer pipe 300 through the rubber corrugated portion 12 .

And the second transport pipe 52 has an expanded inner diameter so that the pressure is higher than that of the first transport pipe 51, and the function of the second transport pipe 52 is to reduce the internal negative pressure of the powder transport pipe 300. In addition, it functions to amplify the scattering effect of the powder by allowing the swirling airflow generated in the spiral part 11 to continue over a long distance.

That is, the second transport pipe 52 supplies a larger amount of compressed air for transport, thereby amplifying the negative pressure inside the powder transport pipe 300 so that the powder stored in the powder storage tank 200 is transported more quickly without clogging function

Hereinafter, the operation of the powder conveying system according to the present invention will be briefly described.

When the air compressor 20 is operated, compressed air for transportation in a temperature range of 180° C. to 200° C. is generated by engine operating heat and compression heat.

This high-temperature compressed air for transportation can carbonize the powder, so that it is discharged to the first outlet 313 through the first inlet 312 formed in the inner cylinder 31 of the heat exchanger 30 in order to reduce the temperature of the powder. .

At the same time, the cooling water received in the external cooling tower 60 is discharged to the second outlet 323 through the second inlet 322 formed in the outer cylinder 32 and circulated.

At this time, a plurality of first baffles 311 are formed in the inner cylinder 31 of the heat exchanger 30, and a plurality of second baffles 321 are formed between the inner cylinder 31 and the outer cylinder 32. By delaying the flow, it is made so that the heat exchange efficiency between them can be increased.

Then, the high-temperature compressed air for transportation is heat-exchanged with the cooling water and is first reduced (cooled) to a temperature range of 100° C. to 120° C.

Here, since the solenoid valve (V) is mounted on the second inlet 322 of the outer cylinder 32 and the temperature sensor is mounted on the first outlet 313 of the inner cylinder 31, the first outlet of the inner cylinder 31 An inflow amount of cooling water into the outer cylinder 32 may be adjusted according to the temperature of compressed air for transportation discharged through the outlet 313 .

In addition, the compressed air for transportation discharged through the first discharge port 313 of the inner cylinder 31 is stored in the compression tank 40 at a constant pressure.

At this time, a pressure gauge 44 and a temperature sensor T are mounted on the compression tank 40, and a solenoid valve V is provided at the third outlet 43, and the compression tank 40 is external The temperature is secondarily reduced through the cooling jacket 41 to a temperature in the range of 90° C. to 100° C., which is a temperature at which the powder is not carbonized.

In addition, the compressed air for transportation discharged from the compression tank 40 is supplied through the compressed air transport pipe 50 .

The compressed air transport pipe 50 is branched into a first transport pipe 51 and a second transport pipe 52. At this time, the first transport pipe 51 has a relatively small inner diameter, so that the speed is high. Compressed air for transport is supplied, and since the inner diameter of the second transport pipe is configured to be relatively expanded, compressed air for transport having a high pressure is supplied.

Here, the compressed air for transport supplied through the first transport pipe 51 passes through the spiral portion formed in the powder transport connection pipe 10 to form a swirling air flow so that the powder is scattered.

At this time, the powder transport connection pipe 10 is vibrated by the swirling air flow, and this vibration can further spread the scattering of the powder.

In addition, since the pressure of the second transport pipe 52 is higher than that of the first transport pipe 51, the swirling air current is amplified to continue over a long distance so that the powder stored in the powder storage tank 200 is transported more quickly without clogging. do.

Since the embodiments described in this specification and the configurations shown in the drawings are only one of the most preferred embodiments of the present invention and do not represent all of the technical spirit of the present invention, various equivalents that can replace them at the time of this application It should be understood that there may be variations and examples.

10: powder transfer connector 11: spiral part 12: rubber corrugated part
20: air compressor
30: heat exchanger 31: inner cylinder 311: first baffle
312: first inlet 313: first outlet
32: outer tube 321: second baffle
321a: hemisphere groove 322: second inlet
323: second outlet
40: compression tank 41: cooling jacket 42: third inlet
43: third outlet 44: pressure gauge
50: compressed air transport pipe 51: first transport pipe 52: second transport pipe
60: cooling tower
T: temperature sensor V: solenoid valve
100: powder conveying system
200: powder storage tank
300: powder transfer pipe

Claims (6)

A powder transport connection pipe 10 connected in series to the powder transport pipe 300 transporting the powder stored in the powder storage tank 200;
an air compressor (20) generating compressed air for transportation supplied to the powder transport pipe (300);
A heat exchanger 30 connected to the air compressor 20 to cool the compressed air for transportation;
a compression tank (40) for storing compressed air for transport supplied from the heat exchanger (30) and discharging it at a constant pressure;
A compressed air transport pipe 50 connected to the compression tank 40 and connected to the powder transport connection pipe 10 so that compressed air for transportation is sent to the powder transport pipe 300;
The heat exchanger 30 reduces the temperature of compressed air for transport heated to a temperature range of 180 ° C to 200 ° C by the compression heat of the air compressor 20 and the engine operation heat to a range of 100 ° C to 120 ° C and supplies it to the compression tank 40 do,
The compression tank 40 has a cooling jacket 41 so that compressed air for transportation is continuously supplied to the inside of the powder transfer pipe 300 at a constant pressure in a state where the compressed air for transportation is reduced to a temperature in the range of 90 ° C to 100 ° C, which is a temperature at which powder is not carbonized. being encased,
The powder transport connector 10 is characterized in that a spiral portion 11 generating spiral vortex along the powder transport direction is partially formed on one side of the inner circumferential surface on one side, and rubber corrugated portions 12 are further formed on both sides. Powder conveying system to be.
According to claim 1,
The heat exchanger 30 includes an inner cylinder 31 having a first inlet 312 and a first outlet 313 formed so that the high-temperature compressed air for transport generated by the air compressor 20 can be cooled and discharged, Characterized in that it is composed of an outer cylinder 32 external to the inner cylinder 31 and formed with a second inlet 322 and a second outlet 323 to circulate the cooling water stored in the cooling tower 60. Powder transport system.
According to claim 2,
A plurality of first baffles 311 arranged in a zigzag pattern are formed inside the inner cylinder 31 to delay the discharge of the introduced compressed air for transportation.
A powder transport system, characterized in that a plurality of second baffles 321 are formed between the outer cylinder 32 and the inner cylinder 31 to delay the discharge of cooling water and exchange heat with compressed air for transportation.
According to claim 3,
The second baffle 321 is formed in an inclined shape in the flow direction of the coolant to prevent internal pressure from increasing, and a plurality of hemispherical grooves 321a generating vortexes are formed on the surface to prevent scale from occurring inside. Powder conveying system, characterized in that made to prevent.
delete According to claim 1,
The compressed air transport pipe 50 has a first transport pipe 51 tangentially connected to the front of the spiral portion 11 of the powder transport connection pipe 10, and is expanded beyond the first transport pipe 51. The powder transport system, characterized in that it is branched into a second transport pipe (52) connected in an inclined direction to the rear of the spiral portion (11).

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