KR102397649B1 - Dust Mainly Iron Oxide Treatment Equipment - Google Patents

Abstract

One aspect of the present invention relates to a foreign material treatment apparatus with a harmful material filter, and more particularly, to a foreign material treatment apparatus with a harmful material filter for collecting foreign materials produced in a combined cycle power plant system having an exhaust heat recovery boiler as an essential facility, wherein the foreign materials are mainly iron oxide and harmful materials contained in exhaust gas. According to one embodiment of the present invention, provided is a foreign material treatment apparatus for an exhaust heat recovery boiler, which has a new structure for filtering foreign materials, such as iron oxide, without interfering a flow of fluid inside the exhaust heat recovery boiler.

Description

Foreign matter treatment equipment containing iron oxide {Dust Mainly Iron Oxide Treatment Equipment}

One aspect of the present invention relates to a foreign material treatment device, and more particularly, foreign materials generated in a combined cycle power generation system having an exhaust heat recovery boiler as an essential component, mainly iron oxide, harmful substances contained in exhaust gas, etc. It relates to a foreign material treatment apparatus having a material filtering filter.

The content described in this section merely provides background information on the embodiments of the present invention and does not constitute the prior art.

In general, combined cycle power generation systems use fuels such as natural gas or diesel to generate electricity by first turning a gas turbine, passing the exhaust gas heat from the gas turbine through a boiler again to produce steam, and secondly turning the steam turbine to generate power. equipment that does

Since the combined cycle power generation system generates power in two stages, the thermal efficiency is about 10% higher than that of the conventional thermal power plant, there is less pollution, and the time to restart after stopping is short.

The combined cycle power generation system includes a large amount of steel structures such as heat exchanger tubes, and as it is operated for a long time, the internal steel structures are corroded by moisture and sulfur oxides in the atmosphere to generate iron oxides.

Since iron oxide is generated as the fin tube is corroded by moisture in the atmosphere when the combined cycle power plant system is stopped, the amount of iron oxide produced increases as the shutdown time of the system increases and the moisture content increases.

According to a study by Korea Southern Power, about 0.7 ~ 5.3 mg/Sm³ of iron oxide is emitted during normal operation, but iron oxide is up to 50 times higher when restarted after a no-load stop and 200 times more iron oxide when restarted after a full-load stop. Emissions have been shown to increase.

The generated iron oxide is scattered into the atmosphere together with the exhaust gas, which is a big environmental problem. In particular, combined cycle power plants are often installed in large cities, and since iron oxide dust can cause great damage if it is discharged to a large city, development of facilities for treating iron oxide dust is in progress.

On the other hand, since the high-temperature exhaust gas discharged after generating power in the gas turbine of the combined cycle power generation system still has a large amount of energy, significant energy loss occurs when discharged to the atmosphere.

Therefore, in the combined cycle power plant system, a heat recovery steam generator (HRSG) is applied as a core facility in order to recover and recycle energy, that is, waste heat or heat, which is wasted as exhaust gas emitted to the atmosphere.

A heat recovery boiler is generally installed at the rear end of a water turbine, and includes a duct part and a stack. .

On the other hand, the foreign material treatment apparatus for treating iron oxide dust includes a foreign material filtering filter for filtering foreign materials. This foreign material filtering filter structure is formed of a flexible material, and when exposed to the pressure of the exhaust gas for a long period of time, it stretches and loses its function.

Therefore, in order to prevent the foreign material filtering filter made of flexible material from being stretched or torn and damaged due to the pressure of the exhaust gas, the foreign material treatment device installed in the heat recovery boiler is installed in the duct part when the filter is placed on the flow path through which the exhaust gas moves. A plurality of roller structures supporting the filter are installed on the rear side adjacent to the filter, so that the filter moves on the roller structure or supported by the roller structure inside the heat recovery boiler.

However, the roller configuration supporting the foreign material filtering filter is installed in a position that crosses the flow path inside the heat recovery boiler. Therefore, it becomes an obstacle to the flow of exhaust gas. In particular, since the exhaust gas moves at high pressure in the heat recovery boiler, the roller configuration installed inside the heat recovery boiler increases the internal pressure of the heat recovery boiler, which is fatal to the durability of the boiler.

Therefore, it is urgent to develop a foreign material treatment device with a new structure that can filter foreign substances such as iron oxide while securing durability without installing a structure that prevents the flow of fluid inside the heat recovery boiler.

The above-mentioned background art is technical information that the inventor possessed for the derivation of the embodiments of the present invention or acquired in the process of derivation, and it cannot be said that it is necessarily known technology disclosed to the general public prior to the filing of the embodiments of the present invention. does not exist.

Accordingly, one aspect according to the present invention is proposed to solve the above-mentioned problems, and an object of the present invention is to filter out foreign substances such as iron oxide without interfering with the flow of fluid inside the heat recovery boiler. An object of the present invention is to provide a foreign material treatment device for a heat recovery boiler.

The technical problems to be achieved by the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned can be clearly understood by those of ordinary skill in the art to which the present invention belongs from the description below. will be.

In order to achieve the above object, one aspect of the present invention is provided for treating foreign substances generated in a combined cycle power generation system, etc., one end connected to a gas turbine and the other end having a duct in communication with the stack. In the applied foreign matter processing apparatus,

a harmful substance filtering filter provided to collect and collect foreign substances including iron oxide;

a filter supply unit installed outside the duct part in which a filter supply pipe is formed, and supplying the harmful substance filtration filter to the inside of the duct part through the filter supply pipe;

a filter recovery unit installed outside the duct part in which the filter discharge conduit is formed, and configured to receive the harmful substance filtration filter through the filter discharge conduit;

a differential pressure sensor for measuring the differential pressure between the upstream and downstream of the harmful substance filtering filter;

a power source provided to drive the filter supply unit or the filter recovery unit; and a control unit for controlling the power source.

According to an embodiment, the filter supply unit and the filter recovery unit may each have a first roller and a second roller therein.

The harmful substance filtering filter may be wound and stored on the first roller, and then supplied to the inside of the duct through the filter supply pipe. In addition, the harmful substance filtering filter may be discharged to the outside of the duct part through the filter discharge pipe. In addition, the harmful substance filtering filter may be accommodated by being wound around the second roller.

According to an embodiment, the filter supply unit and the filter recovery unit each include a first roller and a second roller, and the harmful substance filtering filter is wound and stored on the first roller, and then passes through the filter supply pipe to the duct. It may be supplied to the inside of the unit, discharged to the outside of the duct unit through the filter discharge pipe, and received by being wound around the second roller.

According to an embodiment, the filter supply unit and the filter recovery unit each have a cover housing, the inside of the cover housing is sealed, and so that the exhaust gas inside the duct does not flow out, the internal pressure of the cover housing is the inside of the duct. It can be characterized as higher than the pressure.

According to an embodiment, the cover housing may be characterized in that a thermoelectric element for heating the inside of the cover housing to a set temperature is installed.

According to an embodiment, it may be characterized in that an electromagnet module is disposed between the duct part and the second roller to separate the iron oxides collected by the harmful material filtering filter from the harmful material filtering filter by magnetic force.

According to an embodiment, the power source includes a motor and an inverter for controlling the motor, and the control unit receives differential pressure information from the differential pressure sensor to evaluate the load applied to the harmful material filtering filter, and the load of the harmful material filtering filter It may be characterized in that the inverter is controlled in consideration of the

According to an embodiment, when the load value applied to the harmful substance filtration filter deviates from a set range, the control unit may control the motor speed to lower the accommodation speed of the toxic substance filtration filter.

According to an embodiment, a filter guide portion for maintaining the shape of the harmful material filtering filter is installed on both edges of the harmful material filtering filter, and guide rails on which the filter guide portion can ride and move are installed inside the duct portion. can

As described above, according to an embodiment of the present invention, it is possible to provide a foreign material treatment device for a heat recovery boiler of a new structure capable of filtering foreign substances such as iron oxide without interfering with the flow of fluid inside the heat recovery boiler. there is.

In addition, the effects of the present invention have various effects such as having excellent versatility according to the embodiments, and such effects can be clearly identified in the description of the embodiments to be described later.

The following drawings attached to the present specification illustrate one embodiment of the present invention, and together with the detailed description of the present invention serve to further understand the technical spirit of the present invention, the present invention is a matter described in such drawings should not be construed as being limited only to
1 shows a schematic configuration of a heat recovery boiler to which a foreign material treatment apparatus according to an embodiment of the present invention is applied.
2 conceptually shows a foreign material treatment apparatus for a heat recovery boiler according to an embodiment of the present invention.
3 shows a side view of a filter assembly according to an embodiment of the present invention.
4 shows a top down view of a filter assembly according to an embodiment of the present invention.
5 shows a cross-sectional view of a filter assembly according to an embodiment of the present invention.
6 shows a state in which the tension collecting wire and the tension sensor are installed in the filter assembly according to an embodiment of the present invention.
7 shows a state in which the filter assembly according to an embodiment of the present invention moves on the guide rail of the duct part.
8 shows an embodiment of the pressure collecting unit of FIG. 7 according to an embodiment of the present invention.
9 shows an embodiment of a part to be pressed, which is a configuration of the input collection part of FIG. 8 .
10 schematically shows the appearance of an electromagnet dust collector according to an embodiment of the present invention.

Advantages and features of the present invention, and a method for achieving them will become apparent with reference to the detailed description in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments presented below, it can be implemented in a variety of different forms, and should be understood to include all transformations, equivalents, and substitutes included in the spirit and scope of the present invention. . The embodiments presented below are provided so that the disclosure of the present invention is complete, and to completely inform those of ordinary skill in the art to which the present invention pertains to the scope of the invention. In describing the present invention, if it is determined that a detailed description of a related known technology may obscure the gist of the present invention, the detailed description thereof will be omitted.

The terms used in the present application are only used to describe specific embodiments, and are not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise.

In the present application, terms such as “comprise” or “have” are intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, but one or more other features It should be understood that this does not preclude the existence or addition of numbers, steps, operations, components, parts, or combinations thereof. Terms such as first, second, etc. may be used to describe various elements, but the elements should not be limited by the terms. The above terms are used only for the purpose of distinguishing one component from another.

Hereinafter, embodiments according to the present invention will be described in detail with reference to the accompanying drawings. do.

1 shows a schematic configuration of a heat recovery boiler to which a foreign material treatment apparatus according to an embodiment of the present invention is applied.

Referring to FIG. 1 , a heat recovery boiler 100 (HRSG. Heat Recovery Steam Generator) to which a foreign material treatment device 200 according to an embodiment of the present invention can be applied is a core facility applied to a combined cycle power generation system and the like.

However, the heat recovery boiler 100 referred to in this specification is not necessarily a facility applied only to a combined cycle power generation system, and may be applied to all facilities that discharge flue gas (G), such as an incinerator industrial boiler.

The configuration of the heat recovery boiler 100 generally includes a duct portion 170 . One end of the duct unit 170 may be connected to the rear end of the gas turbine on the combined cycle power generation system, and the other end may be connected to the stack 180 . The duct part 170 of the heat recovery boiler 100 may be provided as a flow path through which the exhaust gas G generated in the gas turbine moves and is discharged through the stack 180 .

The duct portion 170 is, for example, a first duct portion (A), a second duct portion (B) having a larger diameter than the first duct portion (A), and a third having a larger diameter than the second duct portion (B). It may be configured to include a duct portion (C) and a stack portion (D). The first duct part (A), the second duct part (B), and the third duct part (C) may be sequentially formed, and the first duct part (A) may be a part directly connected to the rear end of the gas turbine. , the third duct portion (C) may be a portion connected to the stack (180). The exhaust gas (G) discharged from the rear end of the gas turbine may pass through the first duct part (A), the second duct part (B), the third duct part (C), and the stack 180 to be discharged to the atmosphere.

1 is an example of an exhaust gas treatment device installed inside the duct unit 170, that is, SCR (Selective Catalytic Reduction, selective Catalytic reduction method) An example of a denitration facility is shown. 1, the SCR denitrification facility is installed inside the duct unit 170 formed between the stack 180 and the gas turbine of the combined cycle power generation system to which the heat recovery boiler 100 is applied, that is, on the flue gas (G) movement passage. indicates

The exhaust gas processing apparatus of FIG. 1 is demonstrated in detail. According to an embodiment, the first injection nozzle 110 may be installed inside the second duct part (B). The first injection nozzle 110 may be a component of a yellow plume elimination system (YPES) that suppresses the generation of yellow smoke.

The first injection nozzle 110 is a configuration for reducing yellowing, and in a sulfur reducing agent storage tank (not shown) that stores a reactive agent for reducing yellowing, such as ethanol, ethanol glycol, etc., through a first injection nozzle ( 110), and may be injected in a liquid phase to the exhaust gas (G) passing through the first duct part (A) through the first injection nozzle (110) and passing through the inside of the second duct part (B). This method is called a direct injection method, and the liquid sulfur reducing agent injected through the first injection nozzle 110 and the exhaust gas (G) chemically react, and the generation of yellow smoke contained in the exhaust gas (G) without the intervention of the catalyst layer It can be treated by converting nitrogen dioxide, the causative material, to nitrogen monoxide.

According to an embodiment, the sulfur reducing agent may be injected in the gaseous phase through the first injection nozzle 110 as well as the second injection nozzle 150 to be described later.

According to an embodiment, a plurality of heat exchanger units 120 , 130 , 140 provided to recover thermal energy of the exhaust gas G may be installed inside the third duct part C. The heat exchanger units 120 , 130 , and 140 may be composed of a plurality of tube bundles, including a first heat exchanger unit 120 , a second heat exchanger unit 130 , and a third heat exchanger unit 140 . It may be configured, and may function to generate steam by using the thermal energy of the exhaust gas (G).

According to an embodiment, the second injection nozzle 150 may be installed inside the third duct part C, and the catalyst device 160 may be installed downstream of the second injection nozzle 150 . The second injection nozzle 150 and the catalyst device 160 may be one component of a nitrogen oxide treatment apparatus for treating nitrogen oxides.

The second injection nozzle 150 is a configuration for nitrogen oxide treatment, and a reducing agent for nitrogen oxide treatment, such as ammonia water, is supplied from a reducing agent storage tank (not shown) to the vaporizer through a reducing agent supply pump, etc., and the reducing agent vaporized in the vaporizer It may be injected in a gaseous state into the third duct part C through the second injection nozzle 150 .

The gaseous reducing agent and the exhaust gas (G) pass through the catalyst device 160 according to the SCR (Selective Catalytic Reduction) method, and the harmful nitrogen oxides are converted into harmless nitrogen and water vapor by a reduction reaction and discharged.

According to the embodiment, the second injection nozzle 150 may spray the sulfur reducing agent and the reducing agent simultaneously or sequentially. 150 may be included.

In the present invention, the sulfur reducing agent and the nitrogen oxide treatment device according to the above-described configuration may spray the sulfur reducing agent and the reducing agent simultaneously or temporally, or may selectively spray the sulfur reducing agent and the reducing agent.

For example, when the content of iron oxide and nitrogen dioxide is high and the temperature of the exhaust gas (G) is low at the initial stage of operation (or when the operation is stopped), the exhaust gas processing device installed adjacent to the gas turbine is operated to pass through the inside of the second duct (B). Direct injection of the sulfur reducing agent in liquid form is directly injected into the flue gas (G), and the direct injection of the sulfur reducing agent is stopped during normal operation, when the temperature of the flue gas (G) rises and the direct injection efficiency decreases. The efficiency of the reduction treatment can be increased by injecting and supplying a gaseous sulfur reducing agent to the flue gas (G) whose temperature has dropped while passing through the heat recovery module through the injection nozzle 150 .

In the embodiment shown in FIG. 1, the HRSG SCR system as described above is shown as an example to which the exhaust gas processing device is applied, but this is an example, and the exhaust gas processing device according to the present invention is not limited thereto, and the exhaust gas ( It can be naturally applied to other types of exhaust gas (G) emission facilities such as incinerators and industrial boilers, as well as systems (SCR SYSTEM, SNCR SYSTEM, etc.) having other methods of thermal power plants to reduce air pollutants from G).

2 conceptually shows a foreign material treatment apparatus for a heat recovery boiler according to an embodiment of the present invention, and FIG. 3 shows a side view of a filter assembly 210 according to an embodiment of the present invention.

4 shows a top down view of the filter assembly according to an embodiment of the present invention, and FIG. 5 shows a cross-sectional view of the filter assembly according to an embodiment of the present invention.

In the foreign material treatment apparatus 200 for a heat recovery boiler according to an embodiment of the present invention (hereinafter referred to as a foreign material treatment apparatus), the foreign material may include foreign material generated in the combined cycle power plant system. Among the foreign substances generated in the combined cycle power generation system, iron oxide may be typically included.

The foreign material treatment apparatus 200 according to the present embodiment may be applied to the heat recovery boiler 100 to treat foreign materials, particularly iron oxide. One end of the heat recovery boiler 100 according to the present embodiment may be connected to the gas turbine and the other end may have a duct unit 170 communicating with the stack 180 .

The foreign material treatment apparatus 200 according to an embodiment of the present invention may be installed on the duct portion 170 of the heat recovery boiler 100 . 1 shows a state in which the foreign material treatment apparatus 200 for a heat recovery boiler according to the present embodiment is positioned between the third heat exchanger unit 140 and the stack 180, but is not limited to this position, and heat recovery It may be installed in any part on the flow path through which the exhaust gas (G) containing foreign substances in the duct part 170 of the boiler 100 passes.

The configuration of the foreign material treatment apparatus 200 according to the present embodiment includes a harmful material filtering filter 220 provided to collect and collect foreign materials including iron oxide; A filter supply unit that is installed outside the duct part 170 in which the filter supply pipe 330 is formed, and supplies the harmful substance filtering filter 220 into the duct part 170 through the filter supply pipe 330 . (300);

a filter recovery unit 400 installed outside the duct 170 in which the filter discharge conduit 430 is formed and accommodates the harmful substance filtration filter 220 through the filter discharge conduit 430; a differential pressure sensor for measuring the differential pressure between the upstream and downstream of the harmful substance filtering filter 220;

a power source 450 provided to drive the filter supply unit 300 or the filter recovery unit 400; And a control unit for controlling the power source (450); may include one or more of

The foreign material treatment apparatus according to an embodiment of the present invention may use the harmful material filtering filter 220 to collect and collect the foreign material mainly iron oxide contained in the exhaust gas (G). In the present specification, the hazardous substance filtering filter 220 is a filter device that adsorbs, accumulates, accumulates, and collects pollutants distributed in the air on the filter surface to separate and purify hazardous substances from the exhaust gas.

According to an embodiment, a plurality of support rollers 221 for supporting the harmful substance filtering filter 220 may be disposed inside the duct unit 170 . According to an embodiment, the plurality of support rollers 221 may be installed at regular intervals on the fixed frame 222 installed inside the duct.

Since the harmful substance filtering filter 220 is disposed across the duct part 170 inside the duct part 170, it receives the pressure of the exhaust gas (G) as it is. Accordingly, a plurality of support rollers 221 may be disposed adjacent to the filter 220 on the downstream side of the filter in order to prevent the harmful substances filtering filter 220 from being stretched and damaged due to the pressure of the exhaust gas (G). The filter 220 is supported by a plurality of support rollers 221 to withstand the pressure of the exhaust gas (G). The plurality of support rollers 221 also allow the filter 220 to move smoothly from the filter supply unit 300 to the filter recovery unit 400 . Due to the roller structure, the filter can be returned to the filter recovery unit 400 by gently moving on the support rollers 221 .

According to an embodiment of the present invention, the filter supply unit 300 performs a function of supplying the harmful substance filtration filter 220, and the filter recovery unit 400 recovers the harmful substance filtration filter 220 can be done Both the filter supply unit 300 and the filter recovery unit 400 may be installed outside the duct unit 170 , and may be disposed to face each other with the duct unit 170 interposed therebetween.

According to an embodiment of the present invention, the filter supply unit 300 and the filter recovery unit 400 may have a first roller 320 and a second roller 420 therein, respectively. A harmful substance filtering filter 220 may be wound around the first roller 320 and stored in a roll form. The harmful substance filtering filter 220 is wound on the second roller 420 and may be accommodated in a roll form.

According to an embodiment, the harmful substance filtering filter 220 is wound around the first roller 320 and stored, and may be supplied into the duct unit 170 through the filter supply pipe 330 formed in the duct unit 170, , the duct part 170, the harmful substance filtering filter 220 supplied to the inside may perform a filtration function of filtering foreign substances from the exhaust gas (G) in the unfolded state. The harmful substance filtering filter 220 may be disposed to cross the flow of the exhaust gas (G) and close the flow path formed by the duct unit 170 . The harmful substances filtration filter 220 that has performed the filtering function may be discharged to the outside of the duct 170 through the filter discharge pipe 430 when the foreign material load is greater than or equal to the set value, and the filter collection unit 400 has a It may be accommodated by being wound around the 2 rollers 420 .

A sealing means for preventing the exhaust gas flowing from the inside of the duct unit 170 from flowing into the filter supply unit through the filter supply pipe 330 may be interposed in the filter supply conduit 330 .

The sealing means may include a curtain structure made of a flexible material according to an embodiment. The curtain configuration may include, for example, a curtain made of a flexible material extending from the inner wall of the filter supply pipe 330 toward the harmful substance filtering filter moving in the filter supply pipe 330 . According to the embodiment, the sealing means sprays air from the inner wall of the air curtain configuration, that is, the filter supply pipe 330, to the periphery of the harmful substance filtration filter 220 moving in the filter supply pipe 330 from the inside to the duct part 170. It may be configured to prevent the exhaust gas flowing from the inside of the filter from flowing into the filter supply unit through the filter supply pipe 330 .

The above-described sealing means may be interposed in the filter discharge pipe 430 as well as the filter supply pipe 330 .

According to an embodiment, the filter supply unit 300 and the filter recovery unit 400 may each have cover housings 310 and 410 . Here, the inside of the cover housings 310 and 410 may be sealed, and in order to prevent the exhaust gas (G) flowing inside the duct part 170 from leaking out, the cover housing 310 of the filter supply unit 300 and the filter are collected. The internal pressure of the cover housing 410 of the unit 400 may be maintained higher than the internal pressure of the duct unit 170 .

According to an embodiment, an air blower may be installed in the cover housings 310 and 410 to maintain the inside of the cover housings 310 and 410 at a set pressure. The air blower may supply air to the inside of the cover housings 310 and 410 so that the internal pressure is maintained higher than that of the duct unit 170 . Through this configuration, the exhaust gas (G) flowing inside the duct unit 170 is prevented from flowing into the filter supply unit 300 or the filter recovery unit 400 .

According to an embodiment, thermoelectric elements 340 and 440 for heating the inside of the cover housings 310 and 410 to a set temperature may be installed in the cover housings 310 and 410 . The thermoelectric elements 340 and 440 are installed on the cover housings 310 and 410 so that the heating part faces the inside of the cover housings 310 and 410, and the cold substrate faces the outside of the cover housings 310 and 410. Can be installed . As hot air is ejected into the cover housings 310 and 410 through this structure, the pressure inside the cover housings 310 and 410 rises, and the exhaust gas (G) through the filter supply line 330 or the filter discharge line 430 can be prevented from leaking.

According to the embodiment, between the duct unit 170 and the second roller 420 of the filter recovery unit 400, the iron oxide collected by the harmful material filtering filter 220 is separated from the harmful material filtering filter 220 by magnetic force. An exhaustion device 500 may be installed.

The dust removal device 500 according to an embodiment of the present invention includes a cover part 510, a guide roller for guiding the harmful substance filtering filter 220 inside the cover part 510, and an electromagnet module ( 520) may be included. The upper part 560 of the cover part 510 may have a flat shape, and the lower part 530 of the cover part 510 may be formed in a conical shape, and dust is sucked at the end of the lower part 530 of the cover part 510 . An inlet of the passage may be communicated. The dust suction passage may be connected to the suction pump 550 .

The guide rollers are disposed at regular intervals, and the electromagnet module 520 may be disposed under the guide rollers. An inlet of the dust suction passage may be disposed in the lower portion 530 of the electromagnet module 520 .

An operation method of the exhaustion device 500 according to the present embodiment will be described. The harmful substances filtering filter 220 recovered through the filter discharge pipe 430 may be introduced into the dust removal device 500 and may be moved by riding on a guide roller inside the dust removal device 500 . When the power is turned on to the electromagnet module 520 and a magnetic field is formed while the harmful material filtering filter 220 is moving on the guide roller, iron oxide dust attached to the harmful material filtering filter 220 by the magnetic field The separated and moved between the spaced gaps of the guide roller is attached to the electromagnet module 520 disposed under the guide roller. When the power to the electromagnet module 520 is turned off, the magnetic field is extinguished and the iron oxide dust attached to the electromagnet module 520 is separated and falls to the lower part 530 of the cover part 510 . Since the lower portion 530 of the cover portion 510 is formed in a conical shape, iron oxide dust is collected at the lower portion 530 end of the cover portion 510 by gravity, and the dust connected to the lower portion 530 end of the cover portion 510 . It is sucked through the suction pipe 540 and moves to the receiving part.

The used harmful substances filtering filter 220 contains a large amount of foreign substances. Therefore, if the harmful substance filtering filter 220 containing foreign substances is wound around the second roller 420 as it is and recovered, there may be a problem that the foreign substances are accommodated together. When foreign substances are accommodated in the second roller 420 , when an operator separates and replaces the second roller 420 , the health may be problematic due to dust containing iron oxide or the like.

The configuration in which the harmful substances filtering filter 220 according to this embodiment passes through the electromagnet module 520 before being recovered by the second roller 420 can easily separate foreign substances including iron oxide through the electromagnet module 520 . Therefore, it is possible to store the harmful substances filtering filter 220 from which the iron oxide is separated in the second roller 420, thereby improving the work hygiene of the worker.

A filter replacement operation according to the above-described structure will be described. The operator installs the first roller 320 on which the new harmful substance filtration filter 220 is wound in the form of a roll in the filter supply unit 300, and grabs the end of the first roller 320 and drags the filter supply pipe 330. It can be fixed to the second roller 420 by passing it through the duct 170 and passing it through the filter discharge pipe 430 again. The harmful substances filtering filter 220 spread across the inside of the duct unit 170 filters foreign substances in the exhaust gas (G).

When the replacement time of the harmful material filtering filter 220 comes through the differential pressure sensor, the operator operates the second roller 420 to recover the used harmful material filtering filter 220 . Depending on the embodiment, the power source 450 may be connected to the second roller 420, and the power source 450 transmits the power and the second roller 420 rotates while the used harmful substance filtering filter 220 is completed. It can be wound up and collected in roll form. The operator can replace the second roller 420 in which the used harmful substances filtering filter 220 is accommodated in a roll form by separating it from the filter recovery unit 400 .

According to an embodiment, the power source 450 may include a motor and an inverter for controlling the motor. According to an embodiment, the power source 450 may be configured to include a reducer in a motor. The control unit may receive the differential pressure information from the differential pressure sensor, evaluate the load applied to the harmful material filtering filter 220 , and control the inverter in consideration of the load of the harmful material filtering filter 220 .

According to an embodiment, when the load value applied to the harmful substance filtration filter 220 is out of a set range, the control unit determines that the replacement time has come for the harmful substance filtration filter 220 and controls the motor to collect the filter unit By rotating the second roller 420 on the 400, it is possible to control the harmful substance filtering filter 220 to be recovered to the filter recovery unit.

According to the embodiment, the control unit compares the load value applied to the harmful substance filtering filter 220 with the setting range, and controls the speed of the motor to lower the rotation speed of the second roller 420 on the filter recovery unit 400 to reduce harmful substances. It is possible to control to lower the accommodation speed of the material filtering filter 220 or to increase the rotation speed of the second roller 420 to increase the accommodation speed of the harmful material filtering filter 220 .

For example, when the pressure range set to the normal state in the control unit is from the first reference value to the second reference value (the second reference value is defined as a value greater than the first reference value), the pressure information received from the differential pressure sensor (corresponding to the above-described load value) ) is between the first reference value and the second reference value, and when a predetermined time elapses, it is determined as a normal state, and it is determined that the filter replacement time has arrived, and the motor is controlled to control the second on the filter recovery unit 400 . By rotating the roller 420, it is possible to control the harmful substance filtering filter 220 to be recovered to the filter recovery unit.

For example, when a predetermined time elapses when the load value applied to the harmful material filtering filter 220 is lower than the first reference value in the normal operation of the exhaust heat recovery boiler, the harmful material filtering filter 220 is torn or damaged. It can be determined that the exhaust gas passes through the filter without being filtered. In this case, the control unit may control the filter recovery speed of the second roller 420 to be lowered to the first speed (defined as a value lower than the second speed) so that the filter is slowly recovered.

In addition, when a predetermined time elapses in a state in which the load value applied to the harmful substance filtering filter 220 is higher than the second reference value, the control unit may determine that the filter is overloaded. Also in this case, the control unit may control the filter recovery unit 400 to slowly accommodate the filter by controlling the filter recovery speed of the second roller 420 to lower the first speed.

In such an emergency, if the filter is pulled excessively, the filter may break. If the filter is cut off, the normal operation of the exhaust gas (G) must be stopped, so the energy loss is very large. In addition, it is necessary to put a worker into the duct unit 170 to reconnect the filter. This operation is very cumbersome and uneconomical.

According to the control logic of the control unit according to the present embodiment, since the control unit lowers the control speed below the reference value in an emergency situation, it is possible to block in advance the possibility that the harmful substance filtering filter 220 may be cut, so that the above-mentioned problem can be solved. .

According to an embodiment, a filter guide portion for maintaining the shape of the harmful substance filtering filter 220 may be installed on both edges of the harmful material filtering filter 220 . In addition, a guide rail 260 may be installed inside the duct unit 170 to allow the filter guide unit to ride and slide.

Hereinafter, the combination in which the harmful substance filtering filter 220 and the filter guide unit are combined is referred to as a filter assembly 210 .

In the filter assembly 210 according to the present embodiment, the filter guide part may be configured to include a chain slider 230 , a connect rod 231 , and a filter holder 240 . The filter guide unit may be coupled to the harmful substance filtering filter 220 through the filter holder 240 .

In the filter guide part, the chain slider 230 may be formed in a chain structure and may have a flexible bending structure. Since the chain slider 230 can be bent by being combined with the harmful substance filtering filter 220 made of a flexible material, it can be wound and stored in a roll form on the first roller 320 or the second roller 420 . Since the chain slider 230 includes a chain structure, rigidity is high. Therefore, even if the harmful substance filtering filter 220 is exposed to the high pressure of the exhaust gas (G), durability can be maintained, and when the harmful substance filtering filter 220 is recovered, a strong traction force can be generated.

On one side of the chain slider 230, the connect rod 231 may be formed to extend. The connect rod 231 may function to connect the chain slider 230 and the filter holder 240 . The filter holder 240 may have a rod coupling part 241 concavely formed on one side and a filter coupling part 242 formed in a slot shape on the other side.

A plurality of connect rods 231 may be formed to extend on the side surface of the chain slider 230 . In addition, the connect rod 231 may be strongly coupled to the rod coupling portion 241 in a manner such as interference fitting or screw coupling.

The filter coupling part 242 may be coupled to the rim of the harmful substance filtering filter 220 by being fitted. After the harmful substance filtering filter 220 is inserted into the filter coupling part 242, the fastening pin 243 may be inserted and installed. The filter holder 240 may have, for example, a block shape, and since the filter holder 240 of a plurality of block shapes is coupled to each connect rod 231 , the chain slider 230 and the harmful substance filtering filter 220 together with It can be flexibly banded.

6 shows a state in which the tension collecting wire and the tension sensor are installed in the filter assembly according to an embodiment of the present invention.

In the filter assembly 210 , the harmful substances filtering filter 220 may be stored by being wound around the first roller 320 or the second roller 420 in the form of a long extension in the longitudinal direction. The tension collecting wire 251 may be formed to extend along the width direction perpendicular to the longitudinal direction of the harmful substance filtering filter 220 . The tension collecting wire 251 may be connected to the tension sensor 250 installed in the filter holder 240 . Through this structure, the tension sensor 250 may measure the tension of the tension collection wire 251 to collect information on the tension applied to the harmful substance filtering filter 220 itself. The harmful substances filtering filter 220 according to the present embodiment may be manufactured as a tension release type. Therefore, by applying the tension sensor 250 to the harmful material filtering filter 220 to measure the tension applied to the harmful material filtering filter 220 itself, the state of the harmful material filtering filter 220 can be checked.

The tension sensor 250 may measure a load applied to the harmful substance filtering filter 220 together with a differential pressure sensor to be described later. The differential pressure sensor can measure the pressure difference between the upstream and downstream of the harmful material filtering filter 220 to check the state of the harmful material filtering filter 220, and the tension sensor 250 is applied to the harmful material filtering filter 220 itself. Since the tension is measured, the load applied to the harmful substance filtering filter 220 can be measured more directly than the differential pressure sensor.

A guide rail 260 may be installed inside the duct portion 170 of the heat recovery boiler according to the present embodiment. The guide rail 260 may guide the chain slider 230 of the filter assembly 210 . The guide rail 260 may have a shape in which an upstream side structure 260a and a downstream side structure 260b protrude. The upstream side structure 260a and the downstream side structure 260b of the guide rail 260 may interact to seat the chain slider 230 of the filter assembly 210 . According to this structure, the chain slider 230 is guided on the guide rail 260 to slide and move.

That is, the harmful substance filtering filter 220 may move to the filter recovery unit 400 while the chain slider 230 of the filter assembly 210 moves on the guide rail 260 manually or automatically.

The upstream side structure 260a and the downstream side structure 260b of the guide rail 260 may each have a locking part 270 protruding inward. The locking part 270 may function to hold the chain slider 230 so as not to be separated from the outside while being inserted into the guide rail 260 . Even when the harmful substances filtering filter 220 is exposed to the high temperature and high pressure of the exhaust gas (G), since the configuration of the engaging portion 270 of the guide rail 260 strongly binds the chain slider 230, the harmful substances filtering filter 220 is do not depart

According to the embodiment, the foreign material processing apparatus 200 may include a control unit for controlling the rotation speed of the power source 450 and a differential pressure sensor for measuring the differential pressure between the upstream and downstream of the filter assembly 210 . When the control unit receives the sensing value from the differential pressure sensor and deviates from the reference value, the control unit may control the filter assembly 210 to be recovered to protect the harmful substance filtering filter 220 .

The operator can check the usage state of the harmful material filtering filter 220 by the differential pressure sensor. That is, when the differential pressure between the upstream and downstream of the hazardous material filtering filter 220 is out of the set range, the operator can check the hazardous material filtering filter ( 220) can be recognized.

According to an embodiment, the power source 450 may include a motor controlled by an inverter. The inverter may control the motor according to the control signal of the controller. With this structure, the rotation speed of the motor can be precisely controlled. According to this structure, when the replacement time of the harmful substance filtering filter 220 has elapsed, the control unit 200 may control the rotation speed of the second roller 420 so that it can be quickly recovered.

By the control logic of the control unit, it is possible to prevent damage such as tearing or bursting of the harmful substance filtering filter 220 .

Referring to FIG. 7 , a state in which a pressure collecting unit is positioned on a guide rail according to an embodiment of the present invention is shown.

8 shows an embodiment of the pressure collecting unit of FIG. 7 according to an embodiment of the present invention. And FIG. 9 shows an embodiment of the to-be-pressed part, which is a configuration of the input collecting part of FIG. 8 .

When the filter assembly 210 according to an embodiment of the present invention is in a broken state, the situation may become serious. Since many of the combined cycle power generation systems are located in the city center, a large amount of iron oxide scattering into the city center due to the failure of the filter assembly 210 may cause a great risk. Therefore, the above structure for preventing the failure of the filter assembly 210 is very important.

According to an embodiment, the pressure collecting unit 290 may be installed on the guide rail 260 . Each of the pair of pressure collecting units 290 may be installed on a guide rail 260 in which one end and the other end of the filter assembly 210 are held. The pressure collecting unit 290 may include a resistance sensor configured as a pair of the pressing unit 292 and the pressed unit 292 according to an embodiment.

As the filter assembly 210 resists the flow of the exhaust gas G by the flow of the exhaust gas G, a pair of chain sliders 230 of the filter assembly 210 press the guide rail 260, the guide The pressing parts 292 respectively installed inside the rail 260 press the part 292 to be pressed, and the strength of the electric resistance also increases according to the degree of the pressing force, so that the guide rail ( 260) can be measured.

By this structure, the pressure collecting unit 290 installed inside the guide rail 260 according to the present embodiment applies a pressing force to which a pair of chain sliders 230 of the filter assembly 210 press the guide rail 260 . By measuring the durability limit of the filter assembly 210 can be confirmed.

The resistance sensor constituting the pressure collecting unit 290 may be configured to include a pressing unit 292 and a pressed unit 292 . According to the embodiment, the pressurizing part 292 and the to-be-pressed part 292 are sequentially located along the direction in which the exhaust gas G flows inside the guide rail 260 .

The pressing part 292 is a soft material, and includes a conductive material, and is configured to conduct electricity. The pressing part 292 may be installed on the inner surface of the contact surface in contact with the filter assembly 210 of each of the guide rails 260 .

When a pair of chain sliders 230 of the filter assembly 210 press the surface of each guide rail 260 while in contact with each guide rail 260 in the direction in which the exhaust gas G flows, the guide rail 260 The height of the end portion 292a of the pressing portion 292 is contracted in proportion to the pressure applied while the pressing portion 292 disposed directly on the inner surface of the pressing portion 292 comes into contact with the pressed portion 292 .

For this structure, the pressing part 292 and the pressed part 293 are spaced apart from each other at a predetermined interval inside each of the guide rails 260, and a pair of chain sliders of the filter assembly 210 in the guide rail 260 ( 230), the contact surface in contact may have a soft characteristic.

7 shows a case in which the configuration of the pressure collection unit is installed on the downstream side structure 260b among both the protruding structures 260a and 260b of the guide rail 260, the configuration of the pressure collection unit 290 according to the embodiment is It may be installed on the upstream side structure 260a, and in this case, the chain slider 230 of the filter assembly 210 is pushed (retreated) in the direction in which the exhaust gas G flows, and the upstream side structure of the guide rail 260 ( When the pressure is reduced while moving away from the surface of the guide rail 260, the electrical resistance value generated as the pressing part 292 disposed directly on the inner surface of the upstream structure 260a of the guide rail 260 is gradually released from contact with the part 292 to be pressed. It is possible to measure the degree of tension of the filter assembly 210 based on the change in .

In the case of the portion to be pressed 292, it is composed of a pair of conductors 294, and the pair of conductors 294 form a plurality of conduction branches 295 that are disposed to be spaced apart from each other. In this case, when the pressing part 292 presses the plurality of conductive branches 295, the end portion 292a of the pressing part 292 is formed round and compressed, the contact area increases and the plurality of conductive branches ( 295), the number of branches 295 that are in contact with each other is changed, thereby changing the electrical resistance value between the pair of conductors 294 constituting the portion to be pressed 292.

A pair of conductors 294 of the portion to be pressed 292 are connected to a PCB (not shown) by an electric wire, and may transmit resistance value information to the PCB. The PCB has a communication module mounted therein, and resistance value information can be transmitted to the outside through the communication module.

In the configuration of the filter assembly 210 according to an embodiment of the present invention, in order to withstand the large-capacity flow rate and flow rate of the exhaust gas (G) inside the heat recovery boiler 100, the tension should not be tight and should be kept loose within a set range.

The structure employing the resistance sensor inside the guide rail 260 according to the present invention informs the information about the filter durability limit by checking the tension of the glass fiber actuator.

Since the above-described differential pressure sensor measures only the differential pressure between the upstream and downstream of the glass fiber core, it is difficult to directly measure how much load is applied to the glass fiber core. The structure employing the resistance sensor inside the guide rail 260 according to an embodiment of the present invention can directly measure the pressure of the contact surface of the guide rail 260 with which the filter assembly 210 is in contact, so the harmful substance filtering filter Whether or not the 220 is damaged can be easily predicted.

10 schematically shows the appearance of an electromagnet dust collector according to an embodiment of the present invention.

On the other hand, the foreign material treatment apparatus 200 according to the present invention may further include an electromagnet dust collector 600 . The electromagnet dust collector 600 according to the present embodiment may be installed inside the stack 180 according to the embodiment, and may filter iron oxide from the exhaust gas G moving through the flow path formed by the stack 180 . there is.

When the foreign material treatment device 200 is operated, the filter assembly 210 may be damaged due to overload, such as bursting or tearing, and in this case, it becomes an emergency state. When an emergency state occurs, the foreign material processing apparatus 200 cannot operate normally. In this case, the differential pressure sensor and the pressure collecting unit 290 may monitor whether the foreign material treatment device 200 is in failure, and when it is determined that the foreign material treatment device 200 is in a malfunctioning state, the electromagnet dust collector installed on the stack 180 . (600) can be operated in an emergency.

In the present invention, in the electromagnet dust collector 600, a plurality of straight metal rods 610 form a lattice shape and are connected to the plurality of straight metal rods, and an electromagnet having an N pole and an S pole function on opposite surfaces of the lattice shape, respectively ( 620 and 630 may have a structure in which they are installed.

In this way, by forming a grid shape of an appropriate size with the metal rod 610, the flow of the exhaust gas (G) may not be disturbed, and the N-pole and S-pole electromagnets 620 and 630 are performed on opposite surfaces of the grid shape, respectively. By installing an electromagnet that forms a magnetic field in the metal rod 610 that forms a grid in an emergency, it is possible to efficiently collect iron oxide contained in the flue gas (G) as well as to collect magnetic fine dust. there is

On the other hand, the electromagnet dust collector 600 includes a plurality of pressure measuring sensors to block the flow of the exhaust gas (G) by iron oxide and magnetic fine dust collected in the electromagnet dust collector 600 to increase the pressure. It can be detected, and the replacement time of the electromagnet dust collector 600 can be measured.

That is, the electromagnet dust collector 600 includes a plurality of accommodating spaces therein, a frame formed in a shape surrounding the accommodating space, and a plurality of lattice-shaped metal rods 610 and the metal rods installed in the accommodating space. It may include a module in which electromagnets 620 and 630 of N pole and S pole functions are installed on opposite surfaces of the grid shape, respectively, connected to the 610, and the module includes a plurality of pressure measuring sensors (not shown). The scattering of iron oxides can be prevented from scattering by performing an emergency operation in case of a failure of the foreign material treatment device 200 through the structure installed including.

On the other hand, in the configuration of the guide rail 260 according to an embodiment of the present invention, since the chain slider 230 is seated and slidingly moves, a large load is applied, so it is important to maintain durability.

The foreign material treatment apparatus according to this embodiment includes a temperature sensor capable of measuring the temperature of the guide rail 260 and the chain slider 230, and an oil lubricating device capable of refueling lubricating oil into the guide rail 260; , may further include a fueling controller for controlling the oil refueling device.

According to this structure, the oil refueling controller receives the temperature information of the chain slider 230 from the temperature sensor in real time, determines the refueling time of the lubricating oil injected into the chain slider 230 based on this, and the oil refueling device operates the chain slider 230 ) can be controlled to supply lubricating oil to

In the specification of the present invention (especially in the claims), the use of the term "above" and similar referential terms may be used in both the singular and the plural. In addition, when a range is described in the present invention, each individual value constituting the range is described in the detailed description of the invention as including the invention to which individual values belonging to the range are applied (unless there is a description to the contrary). same as

The steps constituting the method according to the present invention may be performed in an appropriate order unless the order is explicitly stated or there is no description to the contrary. The present invention is not necessarily limited to the order in which the steps are described. The use of all examples or exemplary terms (eg, etc.) in the present invention is merely for the purpose of describing the present invention in detail, and the scope of the present invention is limited by the examples or exemplary terms unless limited by the claims. it is not going to be In addition, those skilled in the art will recognize that various modifications, combinations, and changes can be made in accordance with design conditions and factors within the scope of the appended claims or their equivalents.

Therefore, the spirit of the present invention should not be limited to the above-described embodiments, and the scope of the spirit of the present invention is not limited to the scope of the scope of the present invention. will be said to belong to

100: heat recovery boiler
110: first injection nozzle
120: first heat exchanger unit
130: second heat exchanger unit
140: third heat exchanger unit
150: second injection nozzle
160: catalyst device
170: duct part
180: stack
A: 1st duct part
B: second duct part
C: 3rd duct part
D: Stack
200: foreign material processing device
210: filter assembly
220: harmful substances filtering filter
230: chain slider
231: connect rod
241: rod coupling part
242: filter coupling unit
243: fastening pin
250: tension sensor
251: tension collecting wire
260: guide rail
260a: upstream structure
260b: downstream structure
270: catch
290: pressure collection unit
292: pressurized part
293: part to be pressed
294: conductor
295: branch
300: filter supply unit
310: cover housing
320: first roller
330: filter supply pipe
340: thermoelectric element
400: filter recovery unit
410: cover housing
420: second roller
430: filter discharge pipe
440: thermoelectric element
450: power source
500: escapement device
510: cover part
520: electromagnet module
530: the lower part of the cover
540: dust suction pipe
550: suction pump
560: upper part of the cover
600: electromagnet dust collector
610: metal bar
620: N-pole magnet
630: S pole magnet

Claims (8)

In the foreign material treatment apparatus provided to treat foreign substances generated in the combined cycle power generation system, one end connected to a gas turbine and the other end applied to a heat recovery boiler having a duct part communicating with the stack,
a harmful substance filtering filter provided to collect and collect foreign substances including iron oxide;
a filter supply unit installed outside the duct part in which a filter supply pipe is formed, and supplying the harmful substance filtration filter to the inside of the duct part through the filter supply pipe;
a filter recovery unit installed outside the duct part in which the filter discharge conduit is formed, and configured to receive the harmful substance filtration filter through the filter discharge conduit;
a differential pressure sensor for measuring the differential pressure between the upstream and downstream of the harmful substance filtering filter;
a power source provided to drive the filter supply unit or the filter recovery unit; and
a control unit for controlling the power source;
including,
The filter supply unit and the filter recovery unit each include a first roller and a second roller,
The harmful substance filtering filter is wound and stored on the first roller, is supplied into the duct part through the filter supply pipe, is discharged to the outside of the duct part through the filter discharge pipe, and is wound around the second roller is accepted and
The filter supply unit and the filter recovery unit each have a cover housing, the inside of the cover housing is sealed, and the internal pressure of the cover housing is higher than the internal pressure of the duct part so that the exhaust gas inside the duct does not flow out,
A thermoelectric element for heating the inside of the cover housing to a set temperature is installed in the cover housing,
The filter supply pipe or the filter discharge pipe has a sealing that prevents the exhaust gas flowing from the inside of the duct from flowing into the filter supply unit through the filter supply pipe or from flowing into the filter recovery unit through the filter discharge pipe. A foreign material treatment device for a heat recovery boiler having a means interposed therebetween. delete delete delete According to claim 1,
An electromagnet module for separating the iron oxides collected by the harmful material filtering filter from the harmful material filtering filter by magnetic force is disposed between the duct part and the second roller. According to claim 1,
The power source includes a motor and an inverter for controlling the motor, and the control unit receives the differential pressure information from the differential pressure sensor to evaluate the load applied to the harmful substance filtering filter, and considering the load of the harmful substance filtering filter, the A foreign material treatment device for a heat recovery boiler, characterized in that it controls an inverter. According to claim 1,
The power source includes a motor, and the control unit controls the speed of the motor to lower the accommodation speed of the hazardous material filtering filter when the load value applied to the harmful material filtering filter is out of a set range. A foreign material treatment device for a heat recovery boiler. According to claim 1,
Filter guide parts for maintaining the shape of the harmful substance filtering filter are installed on both edges of the hazardous substance filtering filter, and guide rails for riding and moving the filter guide part are installed inside the duct part. Foreign matter handling device.

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