KR102163230B1 - Caterpillar Type High Pressure Continuous Feeding Machine of Particle Fuel - Google Patents

Abstract

A caterpillar type continuous high pressure powder fuel supplying apparatus of the present invention can replace an existing lock-hopper, completely prevent powder fuel from being leaked, continuously supply the powder fuel, be conveniently driven, and have cheap installation and operation costs. Also, the caterpillar type continuous high pressure powder fuel supplying apparatus can be semi-permanently operated almost without replacement of components for a high pressure hose or the like. In addition, the caterpillar type continuous high pressure powder fuel supplying apparatus can directly and continuously supply the powder fuel such as normal pressure dust coal and chemical fuel to a high pressure container or a high pressure reactor without leakages and supply a lot of the powder fuel compared to the existing continuous high pressure powder fuel supplying apparatus.

Description

Caterpillar Type High Pressure Continuous Feeding Machine of Particle Fuel}

The present invention relates to a device for continuous supply of high-pressure powder fuel of a caterpillar type, specifically, in a caterpillar-type device for continuously supplying powder fuel such as atmospheric pulverized coal and chemical fuel to a high-pressure vessel or a high-pressure reactor. It relates to an improved device so that the powdered fuel pressurized while using the track does not count toward the outside.

Integrated Gasification Combined Cycle (IGCC) refers to a power generation technology in which coal is gasified and then used to operate a combined power plant. In other words, after converting coal into synthetic gas containing hydrogen and carbon monoxide as main components under high temperature and high pressure, harmful substances such as dust and sulfur compounds are removed, purified to a level similar to natural gas, and then used as a raw material for generating electricity. It is an eco-friendly power generation technology.

IGCC is divided into a gasification process that generates syngas from coal, a refining process that removes particles and sulfur compounds contained in the syngas to make clean syngas, and a combined power generation process consisting of a gas turbine and a steam turbine.

The IGCC power generation method has a higher power generation efficiency than the existing pulverized coal power generation method, and thus can achieve a carbon dioxide reduction effect of around 20%. In addition, it can reduce SOx, an air pollutant, by more than 95% and the amount of NOx generated by more than 70%. Since Korea imports almost all of its energy sources from abroad, economical coal should be used as power generation fuel.

Also, due to the ever-intensifying environmental regulations, eco-friendly development methods such as IGCC should continue to be developed until at least the mid-21st century.

In addition to combustion, IGCC technology produces synthetic gas containing hydrogen and carbon monoxide as the main component, and separates and purifies hydrogen as necessary to produce industrial raw materials such as fertilizers and gasification complex fuel cells (IGFCs: Integrated Gasification Fuel Cell) with a power generation efficiency of more than 60%. ) Is also used to supply raw material gas. Through IGCC technology, sulfur, the main component of environmental pollution in coal, can be recovered as pure sulfur that can be sold as a useful product.

In gasification plants such as IGCC, especially dry gasification plants, a storage hopper that stores powdered fuel such as pulverized coal for continuous supply of pulverized coal, is always operated in a high pressure state higher than the gasifier or high pressure reactor pressure. With a feed hopper that supplies the gasifier with airflow transport, and a lock-hopper that continuously supplies powdered fuel from the storage hopper in the normal pressure state to the supply hopper in the pressurized state while repeating pressurization and normal pressure conditions. The high-pressure powder fuel supply system is used.

As shown in Figure 1, in the conventional high-pressure powder fuel supply device, the powder fuel filled in the supply hopper 20 is a powder fuel transfer line by nitrogen gas supplied through the high-pressure nitrogen supply valve 23 in a normal operation state. It is continuously supplied to the high-pressure reactor through 22 and the transfer line opening/closing valve 21. When the powder fuel in the supply hopper 20 is reduced, the transfer line opening/closing valve 21 is closed and a refilling process for refilling the powder fuel into the supply hopper 20 is in progress.

In the refilling process, the storage hopper opening/closing valve 12 of the storage hopper 10 is opened, and a certain amount of powdered fuel in the storage hopper 10 is supplied to the normal pressure lock hopper 14. When the powder fuel is filled in the lock hopper 14, the storage hopper open/close valve 12 is closed and the high-pressure nitrogen supply valve 16 is opened, and the lock hopper 14 is supplied by nitrogen gas supplied through the high-pressure nitrogen supply valve 16. ) Is pressurized to the same pressure as the high pressure supply hopper 20. At this time, the differential pressure transmitter 19 measures whether the lock hopper 14 and the supply hopper 20 have reached the same pressure.

When the pressurization of the lock hopper 14 is completed, the high-pressure nitrogen supply valve 16 is closed and the equalizing valve 18 is opened, and the dome valve 17 is opened, and the powder fuel in the lock hopper 14 is released by gravity. It is refilled with the supply hopper 20. When the powder fuel in the lock hopper 14 is refilled with the supply hopper 20, the dome valve 17 is closed and the equalizing valve 18 is closed, and the vent valve 15 is opened, and the internal pressure of the lock hopper 14 Is depressurized. When the inside of the lock hopper 14 falls to normal pressure through the vent valve 15, the refilling process of the supply hopper 20 is completed. Thereafter, the refilling process of the powder fuel is continuously repeated at regular intervals during the normal operation of the high pressure powder fuel supply device.

In the case of such a conventional high-pressure powder fuel supply device, additional facilities such as a pressurization and decompression device using high-pressure nitrogen for operation, a high-pressure filter system for filtration of vented dust, and a static/differential pressure meter for sequential control are required. The disadvantage is that powder fuel is injected according to a complicated procedure. Along with this, powder fuel is injected in batch, not continuous, so it is impossible to maintain a certain level in the supply hopper, and nitrogen gas is continuously used in the process of pressurizing the lock hopper to the same pressure as the supply hopper, and moisture in the powder fuel When the content is somewhat high, the powder fuel is blocked from the rock hopper to the supply hopper due to a bridging phenomenon, causing a problem that the powder fuel does not come down (see Fig. 2). The bridging phenomenon is a phenomenon in which the powdered fuel in the Rockhopper is pressed by moisture and pressure and cannot be properly discharged to the outside. In order to solve the batch-type supply problem, a plurality of high-pressure powder fuel supply devices are sometimes introduced, but even in this case, there is a problem that only pulse-type continuous supply is possible, and the cost required for the facility is doubled.

Patent Literature 1 is an improvement of the conventional lock hopper system, and aims to solve the problem that it is difficult to accurately measure the amount of transfer of powder fuel from the lock hopper to the supply hopper. To this end, Patent Document 1 introduces a flexible tube between the lock hopper and the supply hopper to respond to pressure changes, and is located at the top of the flexible tube by a distance according to the expansion and contraction of the flexible tube generated during pressurization or exhaust. It is a device that accurately measures the weight of the powder sample loaded in each hopper by moving the rock hopper up and down.

Patent Document 2 relates to a solid feed pump having a pump segment, wherein a plurality of connected cartridges form a closed curve to continuously circulate along a track, and the cartridge relates to an apparatus and method for continuously supplying a solid feed. . However, the device is not designed to withstand high pressure enough to directly supply powdered fuel to the high temperature and high pressure gasifier to be applied in the present invention.

Patent Document 3 relates to a device for transporting a solid feed through a circulating caterpillar. This is also not a method of directly supplying powdered fuel to the high-temperature and high-pressure gasifier applied in the present invention, but is a technology that can be applied simply at normal pressure. Particularly, it is impossible to apply at high pressure because the powder fuel continuously escapes from the side of the caterpillar.

Patent Document 4 relates to an apparatus for supplying a solid supply by rotation of a rotary disk, and is an apparatus using a posimetric pump. Currently, the device provides equipment that can be supplied at 68 bar conditions. However, when the above-described equipment is actually driven, the plugging phenomenon occurs very easily in the rotating part, and thus the rotating driving part is stopped or damaged in severe cases.

Patent Literature 5 is a pump for providing a high-pressure solid feed, which is a device that supplies a pressurized solid feed using the gap while a pair of caterpillars are engaged.

However, in the case of Patent Documents 4 and 5, there is a problem that some powdered fuel leaks when used on a commercial scale for a long period of time due to a perfect sealing problem, and there is a problem that the leakage is too severe at the high pressure required by the present application and thus cannot be used.

Meanwhile, powder fuel continuous supply device using a high pressure hose, high pressure roller, and hollow pin chain by the inventor of the present invention (Korean Patent Application No. 10-2017-0106858) and a high pressure hose combined with a sealing plate, high pressure roller, powder using a hollow pin chain The continuous fuel supply device (Korean Patent Application No. 10-2017-0121120) is a device capable of supplying powdered fuel to a high-pressure device by compressing a high-pressure hose using a high-pressure roller, and a schematic diagram is shown in FIG. 3. The device is the first device capable of continuously supplying powder, which has not been provided in the prior art, to a high-pressure device and substantially continuous use. However, in operating the device, it was found that the maximum pressure was 20 bar, and improvements were needed according to the replacement of the equipment according to the life of the high pressure hose.

In the process of improving and developing the above equipment, the inventor of the present invention developed a screw feeder type high pressure powder fuel continuous supply device (Korean Patent Application No. 10-2018-0073500, hereinafter'conventional device'). The conventional apparatus is a device that pressurizes the powder fuel using a screw feeder and discharges the high-pressure powder fuel in the form of a plug at the end to be supplied to a high-pressure reactor or the like in supplying the powder fuel at high pressure. Here, the plug type is a state in which the powder fuel is pressurized and is united in a cylindrical shape according to the internal shape of the conventional device, and the powder compressed by the pressurization can maintain a certain shape even though there is no moisture. A device using a screw feeder type and a high-pressure hose is a device that can withstand high pressures up to 30 bar, but there is a limit in that the supply of powdered fuel is not large in consideration of the high pressure leakage problem.

Accordingly, the present invention was completed by feeling the need for a device capable of increasing the supply of powdered fuel at a pressure of about 20 bar.

Despite the fact that there are already many inventions for caterpillar type supply devices for supplying powdered fuel as in Patent Documents 2, 4, and 5, all equipment cannot cope with high pressure, and most of them can cope with normal pressure or similar pressure. It is designed, and especially the sealing in the aspect of a caterpillar is not considered at all.

Korean Patent Publication No. 1590135 US Patent Publication No. 8579103 U.S. Patent Publication No. 8739962 U.S. Patent Publication No. 5497873 US Patent Publication No. 8439185

The present invention is to solve the above problems, in a continuous orbit type powder fuel supply device, which can supply powder fuel such as normal pressure pulverized coal and chemical fuel directly to a high pressure container or high pressure reactor without leakage. An object of the present invention is to provide a continuous supply device for high pressure powder fuel of a caterpillar type.

In order to solve the above problems, the present invention provides a powder fuel continuous supply device for continuously supplying powder fuel including a pressurization unit and a discharge unit to a high-pressure container or a high-pressure reactor,

The pressurization part is composed of a powder fuel track feeder that pressurizes the powdered fuel by interlocking with two track assemblies, and the discharge part has an inlet at the lower end of the area where the two track assemblies are engaged. A discharge pipe inlet having a size of one end of the inlet being greater than a distance between the two track assemblies of the caterpillar type; It provides a powder fuel continuous supply device including a discharge pipe including a discharge pipe outlet of the form widening toward the bottom.

The track assembly is composed of three layers and forms the outermost part of a caterpillar track body, and a pressure belt having elasticity is enclosed on the outer shell thereof; A track body convex portion and a track body convex portion disposed at both ends of an outer circumferential surface of the track body and repeatedly formed in an uneven shape to prevent leakage of powder fuel by crossing and pressing each other only when the two track assemblies are engaged;

At least one chain driving the track body;

It includes; at least one sprocket supplying power to the chain.

The present invention has the effect that it is possible to continuously supply powdered fuel without leaking powdered fuel at all, while replacing the existing Rockhopper system, operation is convenient, and installation and operation costs are low. In addition, it has the advantage of being able to operate semi-permanently, which requires little replacement of parts due to high-pressure hoses.

In addition, the present invention has the advantage of being able to continuously supply powder fuel such as atmospheric pressure pulverized coal and chemical fuel to a high pressure container or high pressure reactor without leakage in a continuous track type powder fuel supply device, and the conventional high pressure powder fuel A large amount of powder fuel can be supplied in preparation for a continuous supply device.

1 is a schematic diagram of a device for supplying powder fuel using a lock hopper as a high-pressure powder fuel supply device according to the prior art.
FIG. 2 is a photograph of a bridging phenomenon in which the internal powder fuel is solidified without being discharged even when the rock hopper operates when the moisture content in the powder fuel is somewhat high in the high-pressure powder fuel supply device Rock hopper according to the prior art. It shows the case where pulverized coal, which is the initial powder fuel inside Rockhopper, is properly supplied and the case remains due to bridging.
3 is a perspective view of a powder fuel continuous supply device developed by the inventor of the present invention.
4 is a perspective view of a continuous powder fuel supply device according to an embodiment of the present invention.
5 is a cross-sectional view of a powder fuel continuous supply device according to an embodiment of the present invention.
6 is an exploded perspective view of a continuous powder fuel supply device according to an embodiment of the present invention.
7 is a perspective view of a track assembly according to an embodiment of the present invention.
8 is a perspective view of a track body according to an embodiment of the present invention.
9 is an exploded perspective view of a track body according to an embodiment of the present invention.
10 is a perspective view of a discharge unit according to an embodiment of the present invention.

Hereinafter, specific details of the present invention will be described with reference to FIGS. 4 to 10.

In addition to the matters related to the above technical characteristics, additional elements necessary for carrying out the present invention can be added or subtracted according to the general technical content in the technical field to which this application belongs, so detailed descriptions thereof are omitted, and the technical field to which this application belongs. Known or common techniques generally known in the present invention can be applied to the present invention as needed.

In addition, specific details for carrying out the present invention described above have been described with reference to preferred embodiments of the present invention, but those skilled in the art or those of ordinary skill in the relevant technical field will be in the scope of the claims to be described later. It will be appreciated that various modifications and changes can be made to the present invention without departing from the spirit and scope of the present invention described.

In order to achieve the present invention, in the powder fuel continuous supply device for continuously supplying the powder fuel including a pressurization part and a discharge part to a high-pressure container or a high-pressure reactor,

The pressurization part is composed of a powder fuel track feeder 50 that pressurizes the powder fuel by interlocking with the two track assemblies 100 of the track assembly, and the discharge part has an inlet of the track assembly of the two track assemblies. A discharge pipe inlet 210 disposed at a lower end of a portion where 100 is engaged, and the size of one end of the inlet is greater than a distance between the two caterpillar type track assemblies; It includes a discharge pipe 200 including a discharge pipe outlet 220 in a form that becomes wider toward the bottom.

The track assembly 100 is composed of a three-layered 118, forming the outermost of the caterpillar, and the outermost of the track body 110 is surrounded by an elastic pressure belt 160; It is disposed at both ends of the outer circumferential surface of the track body 110 and has a repetitive concave-convex shape, and only when the two track assemblies 100 are engaged, they cross and compress each other to prevent leakage of powder fuel. ) And the track body convex portion 114; One or more chains 120 driving the track body 110; It includes; one or more sprockets 140 for supplying power to the chain 120.

Referring to FIG. 9, the triple layer 118 of the track body 110 is made of metal, cloth, and metal made of a pressure-resistant material. The fabric of the pressure-resistant material in the middle of the three layers is to prevent the powder fuel in the pressurized state from leaking when the track body 110 moves in a infinite orbit. In addition to the fabric material, any material that can withstand pressure while having elasticity can be replaced.

The pressure belt 160 is made of an elastic cloth material or a rubber material. In the case of a fluid containing gas, a rubber material is required for strict sealing, but since the present invention uses powdered fuel, pressure is maintained by plugging the powdered fuel itself. A cloth made of the same material as the cloth made of the pressure-resistant material of the triple layer 118 may also be used.

At the end of the track body convex portion 112 or the track body convex portion 114, the track body concave-convex buffer portion 115 made of an elastic material to increase the sealing property of the coupling between the track body convex portion 112 and the track body convex portion 1140. ) May be added.

The chain 120 has a length of the entire outer circumference smaller than the outer circumference of the track body 110 and is disposed on the inner track of the track body 110 through the track body connection groove 116 and the chain connection groove 125 It is connected to the track body 110. The power required for the chain 120 is calculated according to the required pressure and the shape of the powder fuel, and a plurality of chains 120 may be installed accordingly. In Figure 9 three chains are shown.

A drive shaft 150 for transmitting power to the sprocket 140; A driving unit (not shown) for driving the drive shaft 150; Is added.

When the chain 120 is driven by the one or more sprockets 140, a track guide 130 capable of maintaining the shape of the chain 120 is disposed inside each chain 120, and the chain A chain roller 127 that can move along the outer surface of the track guide 130 is added to 120, and a track guide hole 135 in which the drive shaft 150 can be disposed is provided in the track guide 130 do.

A track guide 130 for maintaining its shape when the chain 120 is driven by the one or more sprockets 140 is additionally included, and the drive shaft 150 is included in the track guide 130 A track guide hole 1350 that can be arranged is provided.

The outermost portion of the pressure belt 160 is not higher than the track body convex portion 112 and the track body convex portion 114, and the powder fuel at the outermost portion when the track body 110 moves in an endless track. It moves while pressing downward.

In the two track assemblies 100, the track body convex portion 112 and the track body convex portion 114 do not engage with each other at the upper end, but go down to the track body convex portion 112 and the track body convex portion 114. Is arranged to be

The powder fuel is supplied to the powder fuel track feeder 50 by falling from the top of the track assembly 100, and the powder fuel is continuously supplied to the upper part where the two track assemblies 100 do not interlock. A case (not shown) is added to prevent the device from flowing down.

10: storage hopper
12: storage hopper open/close valve
14: Rockhopper
15: vent valve
16: high pressure nitrogen supply valve
17: dome valve
18: equalizing valve
19: differential pressure transmitter
20: supply hopper
21: transfer line open/close valve
22: powder fuel transfer line
23: high pressure nitrogen supply unit
50: powder fuel track feeder
100: track assembly
110: track body
112: track body part
114: track body convex
115: track body uneven buffer
116: track body connection groove
118: Track body 3 layer
120: chain
125: chain connection groove
127: chain roller
130: track guide
135: track guide hole
140: sprocket
150: drive shaft
160: pressure belt
200: discharge pipe
210: discharge pipe entrance
220: discharge pipe outlet

Claims (10)

In the powder fuel continuous supply device for continuously supplying the powder fuel including a pressurization part and a discharge part to a high-pressure container or a high-pressure reactor,
The pressurization part is composed of a powder fuel track feeder that pressurizes the powder fuel by interlocking two track assemblies of the endless track type and inputs it downward,
A discharge pipe inlet having an inlet at a lower end of a portion where the two caterpillar type track assemblies are engaged, and a size of one end portion of the inlet being greater than a distance between the two caterpillar type track assemblies; It includes a discharge pipe outlet in a form that becomes wider toward the bottom,
The track assembly is composed of three layers and forms the outermost part of a caterpillar track body, and a pressure belt having elasticity is enclosed on the outer shell thereof;
A track body convex portion and a track body convex portion disposed at both ends of an outer circumferential surface of the track body and repeatedly formed in an uneven shape to prevent leakage of powder fuel by crossing and pressing each other only when the two track assemblies are engaged;
At least one chain driving the track body;
One or more sprockets supplying power to the chain;
Powder fuel continuous supply device comprising a. delete The method of claim 1,
The triple layer of the track body is composed of metal, cloth, and metal made of a pressure-resistant material,
The pressure belt is made of elastic cloth or rubber material,
Powder fuel continuous supply device to the track body convex portion or the end of the track body convex portion is added to the track body concave-convex buffer portion of an elastic material for increasing the sealing property of the coupling between the track body convex portion and the track body convex portion. The method of claim 3,
The chain has a total outer periphery length smaller than the outer periphery of the track body,
Powder fuel continuous supply device which is disposed on the inner track of the track body and is connected to the track body through the track body connection groove and the chain connection groove. The method of claim 1,
A drive shaft for transmitting power to the sprocket;
A drive unit for driving the drive shaft;
Powder fuel continuous supply device is added. The method of claim 5,
When the chain is driven by the one or more sprockets, a track guide capable of maintaining the shape of the chain is disposed inside each chain,
A chain roller that can move along the outer surface of the track guide is added to the chain,
The continuous powder fuel supply device is provided with a track guide hole through which the drive shaft can be arranged in the track guide. The method of claim 1,
The outermost part of the pressure belt is not higher than the convex part of the track body and the convex part of the track body, and the outermost part of the pressure belt moves while pressing the powder fuel downward when the track body moves in a caterpillar track. Supply. The method of claim 1,
The two track assemblies are arranged so that the track body convex portion and the track body convex portion do not engage with each other at the upper end, but the track body convex portion and the track body convex portion are strongly engaged with each other while going down. The method of claim 1,
The powder fuel continuous supply device to supply the powder fuel to the powder fuel track feeder in a manner that falls above the track assembly. The method of claim 8,
A powder fuel continuous supply device in which a case for preventing the powder fuel from flowing down to the outside of the powder fuel continuous supply device is added to an upper part where the two track assemblies do not interlock.

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