KR102290210B1 - Debris removal device for pressure measurement line of power plants - Google Patents

Abstract

The present invention discloses a foreign material removing device for a pressure measurement line of a power plant. The disclosed foreign material removing device for a pressure measurement line of a power plant comprises: a main body combined with a pressure measurement line for measuring pulverized coal; an operational rod member installed on the main body to be able to move so that the same can be inserted into the pressure measurement line; a foreign material removing part combined with the operating rod member to remove foreign materials from the pressure measurement line; a control module included in the main body to selectively supply compressed air for operating the operational rod member; and a timer included in the control module and setting the operating time of the operational rod member. Therefore, the present invention is installed on a pulverized coal supply part of a power plant and can remove pulverized coal adhering to the pressure measurement line into which pulverized coal is transported through the pulverized coal supply part and introduced.

Description

Debris removal device for pressure measurement line of power plants

The present invention relates to a foreign material removal device for a pressure measurement line of a power plant, and more particularly, pulverized coal and ash attached to a pressure measurement line installed in the pulverized coal supply unit of the power plant and transferred through the pulverized coal supply unit are introduced. It relates to a foreign material removal device for the pressure measurement line of the power plant.

In general, thermal power generation is a power generation method that converts chemical energy of petroleum, coal, natural gas, etc. into mechanical energy, and then converts it into electrical energy by a generator. The mechanical energy is obtained from this, and it is converted into electric power by a generator directly connected to the turbine.

In addition, circulating fluidized bed boilers, which have been widely constructed recently, combine solid fuels such as fossil fuels and biomass fuels with a bed material (or circulating medium) such as sand in a combustion chamber, a cyclone, and a loopseal. ) and by producing steam while circulating the combustion chamber, various fuels including fossil fuels such as coal as well as biomass can be burned based on strong mixing power and heat transfer characteristics.

Such a circulating fluidized bed boiler has very high heat transfer efficiency due to direct heat transfer by solid particles, and the combustion temperature in the furnace is much lower than the furnace temperature of the pulverized coal combustion method, so high-temperature corrosion of water pipes and overheating engines, and equipment damage such as scale are small. There is this.

On the other hand, the pulverized coal supply to the boiler of the thermal power plant supplies air to the pulverized coal supply pipe using a blower, and controls the flow of this air to control the supply amount of the pulverized coal transferred through the pulverized coal supply pipe.

In addition, in the boiler of a conventional thermal power plant, pulverized coal pulverized in a pulverizer is usually supplied through four or more pulverized coal supply pipes to improve thermal efficiency, and pressure measurement to measure the particle size and transfer amount of pulverized coal transferred to the pulverized coal supply pipe line is installed. At this time, the pressure measuring line has a structure in which a purge line for removing the pulverized coal adsorbed therein is connected, and foreign substances are removed by compressed air generated from the purge line.

However, in the pressure measurement line of the prior art as described above, the pulverized coal attached to the inner surface is not removed by the purge line due to the iron component contained in the pulverized coal, and is gradually accumulated.

Therefore, there is a need to improve it.

On the other hand, Domestic Utility Model Publication No. 20-1999-0028889 (published date: July 15, 1999) discloses "a device for automatically removing foreign substances from a surge hopper of a pulverized coal manufacturing facility".

The present invention was created by the above necessity, and it is installed in the pulverized coal supply part to which pulverized coal is transported and is attached to a pressure measuring line that measures the amount and particle size of the pulverized coal to be transported so that the pulverized coal attached to the pressure measuring line can be completely removed. An object of the present invention is to provide a foreign material removal device for a pressure measurement line of a power plant.

In order to achieve the above object, a foreign material removal device for a pressure measuring line of a power plant according to an aspect of the present invention includes a body coupled to a pressure measuring line for measuring pulverized coal, and moving to the main body to be inserted into the pressure measuring line An operation rod member that is operably installed, a foreign material removal unit coupled to the operation rod member to remove foreign substances from the pressure measuring line, is provided in the body to selectively supply compressed air for operation of the operation rod member It is provided in the control module, and the control module, characterized in that it comprises a timer and PLC control for setting the operation time of the operation rod member.

In addition, in the present invention, the foreign material removal unit, a brush member made of metal so as to be in contact with the inner surface of the pressure measurement line to remove the foreign material, and the brush member coupled to the operation rod member to fix the brush member to the operation rod member It is characterized in that it includes a brush fixing member.

In addition, in the present invention, the brush fixing member has a fastening groove formed at the end of the operation rod member, and a first fastening hole through which a fixing bolt coupled to the fastening groove passes is formed to be supported on the end of the operation rod member. It characterized in that it comprises a first fixing plate, and a second fixing plate through which the fixing bolt passes, the second fixing plate is formed in close contact with the brush member to the first fixing plate.

In addition, in the present invention, the foreign matter removal unit, the brush fixing member is characterized in that it is rotatably coupled to the end of the operation rod member.

In addition, in the present invention, the brush fixing member includes a rotation support bearing fixed to the bearing coupling groove at the end of the operation rod member by press-fitting, and a bearing fixing shaft fixed to the inner ring of the rotation support bearing by press-fitting, and a central portion is provided. A bolt fastening hole to which a fixing bolt for fixing the brush member is fastened is formed, a first fixing plate to which the brush fixing member is contacted and supported is formed on one surface, and a through hole through which the fixing bolt passes, through the fixing bolt and a second fixing plate coupled to the first fixing plate to attach the brush member to the first fixing plate.

In addition, in the present invention, the brush member has a smaller diameter than the diameter of the brush fixing member, and is joined along the outer surface of the supporting thin plate having a fixing hole through which the fixing bolt passes, and the supporting thin plate, and the brush fixing It is characterized in that it comprises a brush exposed to the outer surface of the member.

In addition, in the present invention, the brush member is characterized in that a plurality of stacked and fixed between the first fixing plate and the second fixing plate.

As described above, in the foreign material removal device for a pressure measurement line of a power plant according to an aspect of the present invention, the foreign material removal unit coupled to the end of the operation rod member is brought into contact with the inner surface of the pressure measurement line and transferred, unlike the prior art. It has the effect of completely removing the pulverized coal attached to the pressure measuring line.

In addition, the foreign material removal device for the pressure measurement line of the power plant according to the present invention can replace only the excessively worn part without replacing the entire brush member when the brush member is worn, thereby reducing maintenance costs. have an effect

In addition, in the foreign material removal device for a pressure measurement line of a power plant according to the present invention, since the foreign material removal unit is rotatably installed on the operation rod member, the foreign material removal unit rotates on the inner surface of the pressure measurement line according to the operation of the operation rod member, It has the effect of more effectively removing foreign substances.

1 is a schematic diagram for explaining an apparatus for removing foreign matter for a pressure measurement line of a power plant according to an embodiment of the present invention.
2 is a perspective view for explaining an apparatus for removing foreign matter for a pressure measurement line of a power plant according to an embodiment of the present invention.
3 is a perspective view illustrating an operation rod member and a foreign material removal unit according to an embodiment of the present invention.
4 is a cross-sectional view for explaining an operation rod member and a foreign material removal unit according to an embodiment of the present invention.
5 is a schematic diagram for explaining the operation of the foreign matter removal device for the pressure measurement line of the power plant according to an embodiment of the present invention.
6 is a perspective view for explaining a foreign material removal unit according to another embodiment of the present invention.
7 is a cross-sectional view for explaining a foreign material removal unit according to another embodiment of the present invention.

Hereinafter, a preferred embodiment of the foreign matter removal device for the pressure measurement line of the power plant according to the present invention will be described with reference to the accompanying drawings. In this process, the thickness of the lines or the size of the components shown in the drawings may be exaggerated for clarity and convenience of explanation.

In addition, the terms to be described later are terms defined in consideration of functions in the present invention, which may vary according to the intention or custom of the user or operator. Therefore, definitions of these terms should be made based on the content throughout this specification.

1 is a schematic diagram for explaining an apparatus for removing foreign matter for a pressure measurement line of a power plant according to an embodiment of the present invention, and FIG. perspective view for

In addition, Figure 3 is a perspective view for explaining the operation rod member and the foreign material removal unit according to an embodiment of the present invention, Figure 4 is a cross-sectional view for explaining the operation rod member and the foreign material removal unit according to an embodiment of the present invention, 5 is a schematic diagram for explaining the operation of a foreign material removal device for a pressure measurement line of a power plant according to an embodiment of the present invention.

Also, FIG. 6 is a perspective view illustrating a foreign material removal unit according to another embodiment of the present invention, and FIG. 7 is a cross-sectional view illustrating a foreign material removal unit according to another embodiment of the present invention.

1 to 5 , the supply of pulverized coal as a raw material for ignition to a thermal power plant by a boiler (not shown) is called a Coal Flow.

And, in order to supply the pulverized coal from the pulverizer to the boiler, the pulverizer and the boiler are connected through the pulverized coal supply pipe 10, the pulverized coal is pulverized in the pulverizer, and is supplied to the boiler through the pulverized coal supply pipe 10 by the flow of air. .

In addition, the pulverized coal supply pipe 10 for supplying the raw material to the boiler is provided with a pressure measuring line 20 to measure the supply information of the raw material. Here, the raw material supply information (call-floor information) includes a pulverized coal supply rate, a pulverized coal particle size, a pulverized coal supply pipe state, and the like.

At this time, the pressure measurement line 20 is connected to the pulverized coal supply pipe 10 , and the pulverized coal transferred from the pulverized coal supply pipe 10 is introduced by using a pneumatic pressure difference. And the pressure measurement line 20 is coupled to the foreign material removal device 100 for the pressure measurement line of the power plant, the measurement unit 30 is connected through the foreign material removal device 100 for the pressure measurement line of the power plant, and the pressure measurement line 20 ) to measure the pulverized coal flowing in through the

At this time, the pulverized coal containing iron is magnetic in the pressure measurement line 20 and is adsorbed to the inner surface of the pressure measurement line 20 , so that the pressure measurement is not performed smoothly by the measurement unit 10 .

The foreign material removal apparatus 100 for a pressure measurement line of a power plant according to an embodiment of the present invention is configured to completely remove the pulverized coal foreign material adsorbed on the inner surface of the pressure measurement line 20 .

Specifically, the apparatus 100 for removing foreign substances for a pressure measurement line according to the present embodiment includes a body 110 coupled to the pressure measurement line 20 and an operation rod member 120 that is installed so as to be capable of linear movement on the body 110 . ), a foreign material removal unit 130 coupled to the operation rod member 120 so as to contact the inner surface of the pressure measuring line 20 , a control module 140 provided in the body 110 , and a control module 140 . It includes a timer 150 provided in the. In this case, the control module 140 may apply a Proportional-Integral-Derivative (PID) control method.

The foreign material removal device 100 for the pressure measuring line according to this embodiment controls the linear reciprocating motion of the operation rod member 120 by controlling the oil and pneumatic pressure supplied to the body 110 by the control module 140 and , the operating time is set by the timer 150 . For example, the timer 150 may be set so that the foreign material removal device 100 for the pressure measurement line operates twice in 24 hours, and the time setting may be adjusted according to the conditions of the site and the needs of the user.

In this embodiment, although the main body 110 has been described as an example that the actuating rod member 120 is operated by oil and pneumatic methods, the main body 110 can operate the actuating rod member 120 by using the electromagnetic induction method. may be

The main body 110 has a fixing flange fixed to the pressure measurement line 20 through a bolt and a nut, and is controlled by a PID (Proportional-Integral-Derivative) control module 140 and a timer 150. it will work At this time, the main body 110 is coupled to the pressure measurement line 20 through the branch pipe 111 , and the measuring unit 30 is connected to the branch pipe 111 .

The operation rod member 120 is movably installed in the body 110 so as to be inserted into the pressure measurement line 20 , and the foreign material removal unit 130 is connected to the end thereof. The operation rod member 120 moves in a straight line by the compressed air selectively supplied to the body 110 through the control module 140 .

The foreign material removal unit 130 according to this embodiment is fixed to the end of the operation rod member 120 so as to be in contact with the inner surface of the pressure measurement line 20 , and moves together according to the linear motion of the operation rod member 120 . Foreign substances adsorbed on the inner surface of the pressure measurement line 20 are removed.

To this end, the foreign material removal unit 130 according to the present embodiment includes a brush member 131 in contact with the inner surface of the pressure measurement line 20 and a brush for fixing the brush member 131 to the operation rod member 120 . Includes a fixing member (133). In this case, the brush member 131 may be made of metal having excellent wear resistance, and the brush fixing member 133 may be made of engineering plastic having excellent heat resistance.

The brush member 131 is fixed to the end of the operation rod member 120 through the brush fixing member 133, and is inserted into the pressure measurement line 20 so as to be in contact with the inner surface of the pressure measurement line 20 to the pressure measurement line ( 20) to remove foreign substances attached to and adsorbed on the inner surface.

The brush member 131 includes a thin support plate 131b having a fixing hole 131a formed in the center thereof, and a brush 131c joined along the outer peripheral surface of the thin support plate 131b, and a brush fixing member 133. A plurality of them are stacked and fixed.

The supporting thin plate 131b is formed in a disk shape to have a diameter smaller than the diameter of the brush fixing member 133 .

The brush 131c is joined to the support thin plate 131b through high-frequency fusion or welding, and is exposed to the outside of the brush fixing member 133 to contact the inner surface of the pressure measurement line 20 . In addition, while moving in the pressure measurement line 20 according to the operation of the operation rod member 120 , foreign substances attached to and adsorbed on the inner surface of the pressure measurement line 20 are removed.

On the other hand, after the operation rod member 120 is operated, the purge unit 40 operates to remove foreign substances remaining in the pressure measurement line 20 toward the pulverized coal supply pipe 10 side.

Since a plurality of brush members 131 according to this embodiment are stacked and fixed to the brush fixing member 133 , the quantity installed can be adjusted according to the diameter of the pressure measuring line 20 , and a lot of wear occurs during replacement. Only some parts can be replaced. Through this, the user's convenience can be improved and maintenance costs can be reduced.

The brush fixing member 133 is coupled to the operation rod member 120 to fix the brush member 131 to the end of the operation rod member 120 .

Specifically, the brush fixing member 130 includes a fastening groove 133a formed at the end of the actuating rod member 120 and a fastening bolt 133b fastened to the fastening groove 133a of the actuating rod member 120 . A first fixing plate 133c fixed to the end thereof, and a second fixing plate 133d for fixing the brush member 131 in pairs with the first fixing plate 133c are provided.

The fastening groove portion 133a is formed along the axial direction of the operation rod member 120 to enable the fastening of the fixing bolt 133b, and a female screw is formed on the inner surface.

The first fixing plate 133c has a first fastening hole 133c ′ formed in the central portion through which the fixing bolt 133b passes, and is supported in contact with the end of the operation rod member 120 . The first fixing plate 133c is formed in a disk shape to have a larger diameter than the diameter of the operation rod member 120 and the thin supporting plate 131b.

The second fixing plate 133d has a second fastening hole 133d ′ formed in the central portion so that the fixing bolt 133b penetrates, and the brush member 131 is in close contact with the first fixing plate 133c by the fixing bolt 133b. to fix That is, a plurality of brush members 131 are stacked and fixedly fixed between the first fixing plate 133c and the second fixing plate 133d.

6 and 7 , the foreign material removal unit according to the present invention may be configured to more effectively remove the foreign material from the pressure measuring line 20 .

Specifically, the foreign material removal unit 160 according to the modified example is provided so that the brush member 131 and the brush fixing member 160a can rotate in the operation rod member 120 as the operation rod member 120 operates. .

In describing the foreign material removing unit according to the modified example, the same reference numerals are used for the same and similar components as the foreign material removing unit according to the embodiment, and a detailed description thereof will be omitted.

In the foreign material removal unit 160 according to a modified example, a brush fixing member 160a for fixing the brush member 131 to the operation rod member 120 is rotatably installed on the operation rod member 120 .

To this end, the brush fixing member 160a according to the present embodiment includes a bearing coupling groove 161 formed on the end surface of the operation rod member 120 and a rotation support bearing 163 press-fitted into the bearing coupling groove 161 . ), and a first fixing plate 165 coupled to the rotation support bearing 163 and a second fixing plate 167 fixed to the first fixing plate 165 through a fixing bolt 133b. In this case, a plurality of brush members 131 are stacked and supported between the first fixing plate 165 and the second fixing plate 167 .

As for the rotation support bearing 163, the outer ring is press-fitted into the bearing coupling groove 161, and the first fixing plate 165 is press-fitted into the inner ring.

The first fixing plate 165 has a bearing fixing shaft 165a that is press-fitted into the inner ring of the rotation support bearing 163 in the central portion of the protruding part, and a bolt fastening hole 165b to which the fixing bolt 133b is fastened at the center of the first fixing plate 165 is penetrated. is formed

The second fixing plate 167 is fixed to the first fixing plate 165 through the fixing bolts 133b to closely fix the brush member 131 .

The foreign material removal device 100 for a pressure measurement line of a power plant according to the present invention configured as described above is a foreign material removal unit 130 at the end of the operation rod member 120 that is inserted into the pressure measurement line 20 and moves linearly. ), it is possible to stably and completely remove foreign substances adhering to and adsorbed on the inner surface of the pressure measurement line 20 .

In addition, the foreign material removal device 100 for the pressure measurement line of the power plant according to the present invention does not replace the entire brush member 131 when the brush member 131 is worn, but only partially replaces the excessively worn portion. Therefore, it is possible to reduce the maintenance cost.

In addition, in the foreign material removal device 100 for a pressure measurement line of a power plant according to the present invention, the first fixing plate 165 of the foreign material removal unit 160 rotates on the operation rod member 120 through the rotation support bearing 163 . Since the installation is possible, the foreign material removal unit 160 is rotated on the inner surface of the pressure measuring line 20 according to the operation of the operation rod member 120, so that the foreign material can be more effectively removed.

Although the present invention has been described with reference to the embodiment shown in the drawings, this is merely exemplary, and it is understood that various modifications and equivalent other embodiments are possible by those of ordinary skill in the art. will understand

Accordingly, the true technical protection scope of the present invention should be defined by the claims.

100: Foreign matter removal device for pressure measurement line of power plant
10: pulverized coal supply pipe 20: pressure measurement line
110: body 120: operation rod member
130, 160: foreign material removal unit 131: brush member
133, 160a: brush fixing member 161: bearing coupling groove
163: rotation support bearing 165: first fixed plate
167: second fixing plate

Claims (6)

a main body coupled to a pulverized coal supply pipe and coupled to a pressure measuring line for measuring pressure; an operation rod member movably installed in the main body to be inserted into the pressure measuring line and having a bearing coupling groove formed at an end thereof; a foreign material removal unit coupled to the operation rod member to remove foreign material from the pressure measuring line; a PID (Proportional-Integral-Derivative) control module provided in the main body to selectively supply compressed air for operation of the operation rod member; and a timer provided in the control module and configured to set the operation time of the operation rod member.
The main body is coupled to the pressure measuring line through a branch pipe to which the measuring part is connected,
The foreign material removal unit may include: a brush member made of metal in contact with the inner surface of the pressure measuring line to remove the foreign material; and a brush fixing member coupled to the operation rod member to fix the brush member to the operation rod member;
The brush fixing member may include a fastening groove formed at an end of the operation rod member; a first fixing plate having a first fastening hole through which a fixing bolt coupled to the fastening groove is formed and supported on an end of the operation rod member; a second fixing plate having a second fastening hole through which the fixing bolt passes to attach the brush member to the first fixing plate; and a rotation support bearing fixed to the bearing coupling groove by press-fitting.
The brush member may include a thin supporting plate having a diameter smaller than that of the brush fixing member and having a fixing hole through which the fixing bolt passes; and a brush joined along the outer surface of the supporting thin plate and exposed to the outer surface of the brush fixing member, manufactured by metal and stacked and fixed in plurality between the first and second fixing plates,
The foreign material removal unit, the brush member and the brush fixing member are rotatably coupled to the end of the operation rod member,
The first fixing plate, the bearing fixing shaft fixed by press-fitting to the inner ring of the rotation support bearing is formed to protrude, and a bolt fastening hole to which the fixing bolt for fixing the brush member is fastened is formed in the central portion, and the brush is formed on one surface A foreign material removal device for a pressure measurement line of a power plant, characterized in that the fixing member is contacted and supported. delete delete delete delete delete

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