KR101616816B1 - Device and method for separation discharge of slag during process of gasification of coal using rotating pipe - Google Patents

Device and method for separation discharge of slag during process of gasification of coal using rotating pipe Download PDF

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Publication number
KR101616816B1
KR101616816B1 KR1020150046208A KR20150046208A KR101616816B1 KR 101616816 B1 KR101616816 B1 KR 101616816B1 KR 1020150046208 A KR1020150046208 A KR 1020150046208A KR 20150046208 A KR20150046208 A KR 20150046208A KR 101616816 B1 KR101616816 B1 KR 101616816B1
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South Korea
Prior art keywords
slag
pressure water
piping
rotating
coal
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KR1020150046208A
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Korean (ko)
Inventor
황상연
전동환
이승종
윤용승
나한진
Original Assignee
고등기술연구원연구조합
한국서부발전(주)
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Priority to KR1020150046208A priority Critical patent/KR101616816B1/en
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    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
    • C10J3/46—Gasification of granular or pulverulent flues in suspension
    • C10J3/48—Apparatus; Plants
    • C10J3/52—Ash-removing devices
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
    • C10J3/72—Other features
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00—Combustion technologies with mitigation potential
    • Y02E20/16—Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]
    • Y02E20/18—Integrated gasification combined cycle [IGCC], e.g. combined with carbon capture and storage [CCS]

Abstract

The present invention relates to an apparatus for separating and discharging slag by particle size.
More particularly, the present invention relates to an apparatus and a method for separating and discharging a slag from a coal gasification process using a rotating body piping having a porous structure, and more particularly, To be able to do so.
The present invention relates to a coal gasifier for producing a synthesis gas using coal; A slag storage part for receiving and storing slag generated in the coal gasifier; A slag moving line connecting the slag reservoir from the coal gasifier to provide a path through which the slag is transferred to the slag storage; A rotating body piping for constituting a part of the slag moving line and separating a part of the slag transferred to the slag storing part; And a cooling unit for receiving the separated slugs; .

Description

Technical Field [0001] The present invention relates to a method and apparatus for separating and discharging slag from a coal gasification process using a rotating body piping,

The present invention relates to an apparatus and a method for separating and discharging slag generated in a coal gasification process, and more particularly, to an apparatus and a method for separating and discharging slag using a rotating body piping.

Coal gasification (Coal gasification) is a technology to produce syngas by converting coal into gas with high heat. That is, when coal is reacted with oxygen and water vapor under high temperature / high pressure, synthesis gas such as carbon dioxide and hydrogen is generated, and the coal gasification process is a process of producing such synthesis gas.

The reason why the coal gasification process is popular in the next generation renewable energy field is that when the syngas is used as the fuel of the power plant, the cost for collecting the carbon dioxide is 30 to 50 compared with the case of using the coal as the fuel in the existing coal- %, And pollutants such as sulfuric acid and dust are remarkably reduced.

In addition, since coal is distributed evenly throughout the world, it is less affected by domestic and international political situation than oil that is concentrated in specific regions and is cheaper than petroleum. In addition to this, coal production is 150 years The coal gasification process related to coal is attracting attention.

In particular, the Integrated Gasification Combined Cycle (IGCC), which uses electricity generated from the syngas produced through the coal gasification process, is in the early stage of commercialization but is expected to have a market value of 1200 trillion won by 2030 .

On the other hand, in the process of gasification of coal through the coal gasification process, depending on the type of coal to be gasified, the combustion process, or the gasification method, the amount and composition of the byproducts are slightly different, but the slag is produced as a by-product.

The slag discharging device, which has been applied to the conventional coal gasification process, will now be described.

In the conventional slag discharging device, the slag discharged through the coal gasifier is stored in the cooling water tank, the relatively large-sized slag is transferred from the cooling water tank to the slag storage tank, and the slag with relatively small particle size is detected by the cooling water tank And discharged as mixed wastewater to be transported to a wastewater treatment facility. In this case, the cooling water tank is at a high pressure in the process of discharging the wastewater, while the outlet pipe line through which the wastewater is discharged from the cooling water tank is relatively low pressure. The slag having a large particle size due to the pressure difference between the two is discharged together with the wastewater through the outlet pipe line .

As a result, the piping was damaged, and in particular, the flow control valve installed in the piping was damaged. This causes leakage of wastewater and malfunction of the valve.

Therefore, it is difficult to maintain a constant water level in the cooling water tank, which causes a fluctuation of the pressure to be increased, giving a load to the entire process, which makes it difficult to operate the system for a long period of time.

It is therefore an object of the present invention to provide a method and apparatus for effectively separating slag generated in a coal gasifier by a rotating body piping according to particle size while preventing slag having a large particle size from being introduced into a wastewater treatment line for processing slag having a small particle size Thereby preventing damage to the wastewater treatment line and decreasing the pressure change in the cooling water tank, thereby reducing the load on the system and enabling stable operation of the system over a long period of time.

According to an aspect of the present invention, there is provided a coal gasification process for producing a syngas using coal; A slag storage part for receiving and storing slag generated in the coal gasifier; A slag moving line connecting the slag reservoir from the coal gasifier to provide a path through which the slag is transferred to the slag storage; A rotating body piping included in the slag moving line for separating a part of the slag to be transferred to the slag storing part; And a cooling unit for receiving the separated slugs; There is provided a slag separating and discharging device for a coal gasification process using a rotating body piping.

The rotating body piping can separate a part of the slug while rotating around an axis in the longitudinal direction of the rotating body piping.

The rotating body piping may have a working part.

A high pressure water injection unit provided between the coal gasifier and the slag moving line for spraying water; As shown in FIG.

A water compression unit for supplying water injected through the high-pressure water injection unit; And

A high-pressure water supply main line providing a path for supplying compressed water from the water compression unit to the high-pressure water injection unit; As shown in FIG.

The rotating body piping includes: a cylindrical body rotating about an axis in the longitudinal direction; A rotary high-pressure water supply unit for supplying water into the rotary pipe; A high pressure water discharging portion for discharging water from the inside of the rotating body piping; And an impeller for transmitting a force from the high-pressure water to the cylindrical body so that the cylindrical body can be rotated by colliding with high-pressure water supplied to the inside of the rotary body piping; . ≪ / RTI >

A rotary injection unit formed downstream of the rotary high-pressure water discharge unit for spraying water discharged from the rotary high-pressure water discharge unit to the rotary pipe; As shown in FIG.

A high-pressure water supply branch line branched from the high-pressure water supply main line and supplying high-pressure water to the rotation high-pressure water supply unit; And can supply water to the rotating high-pressure water supply unit through the high-pressure water supply branch line.

A discharge line formed at one side of the cooling unit and providing a path for discharging the fluid stored in the cooling unit; And a bypass line bypassing the discharge line to provide a path for discharging the fluid stored in the cooling unit; As shown in FIG.

According to another aspect of the present invention, there is provided a coal gasification process for transferring slag generated from a coal gasifier for producing a synthesis gas using coal to a slag moving line, There is provided a method for separating and discharging slag from a coal gasification process using a rotating body piping for separating slag according to the particle size of the slag by rotating around a longitudinal axis of the pipeline.

According to the present invention, the slag generated during the coal gasification process proceeding at a high temperature / high pressure is collected through piping and the slag is separated and discharged according to the particle size of the slag while passing through the rotating body piping rotated by the high pressure water, It is possible to reduce the damage of the waste water discharge pipe and the load of the waste water discharge system.

In addition, according to the present invention, since the high-pressure water used in the conventional process is used to rotate the rotating body piping, no separate power device is required, so that the problem of the existing system can be solved while minimizing the design change.

In addition, since the fluctuation of the pressure of the entire system is minimized, stable continuous operation of the coal gasification process operated at a high pressure is possible.

1 is a configuration diagram of a slag separating and discharging apparatus for coal gasification process using a rotating body piping according to an embodiment of the present invention.
FIG. 2 is an enlarged view of a rotating body piping as an enlarged view of a rotating body piping used in a slag separating and discharging apparatus for a coal gasification process using a rotating body piping according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The present invention will be described with reference to an embodiment shown in the drawings, but it is to be understood that various modifications and equivalent embodiments are possible without departing from the scope of the present invention. Therefore, the true scope of protection of the present invention should be defined only by the appended claims.

1 is a configuration diagram of a slag separating and discharging apparatus for coal gasification process using a rotating body piping according to an embodiment of the present invention.

As shown in FIG. 1, the apparatus for separating and discharging a slag from a coal gasification process using a rotating body piping according to an embodiment of the present invention includes a coal gasifier 11, a coal gasifier 11, A cooling section 12 for cooling and storing the slag having a small grain size among the slag generated in the coal gasifier 11, a cooling section 12 for cooling the slag generated in the coal gasifier 11, A slag moving line 16 for providing slag moving path to the slag storing part 13, a cooling part 12 and a dust removing part 14 for processing dust by receiving slag generated in the slag storing part 13 A water compression unit 15 for supplying water at a high pressure required in the slag treatment process and slag movement line 16 for separating the slag generated from the coal gasifier 11 according to the particle size Whole ship It comprises 200.

Among them, the slag is separated by the granularity while passing through the rotary pipe 200 rotating. More specifically, the rotating body piping 200 separates the slag by particle size using the punching. The structure and operation of the rotating body piping 200 including the punching work will be described in more detail with reference to FIG.

In addition, a high-pressure water jetting device is provided between the coal gasifier 11 and the slag moving line 16 and injects high-pressure water into the slag discharged from the coal gasifier 11 to produce slag as a water- Unit 120 may be provided. The rotary pipe 200 may further include a rotary injection unit 130 for injecting high-pressure water into the rotary pipe. The high-pressure water injection unit 120 and the rotary injection unit 130 may be plural in number.

A high pressure water supply main line 100 providing a path through which high pressure water is transferred between the water compression unit 15 and the high pressure water injection unit 120 to supply high pressure water to the high pressure water injection unit 120 . Pressure water is supplied between the water-compressing unit 15 and the rotary injection unit 130 to supply the high-pressure water to the rotary injecting unit 130, And a high-pressure water supply branch line 110. [

On the other hand, in order to transfer slag and fluid such as water (hereinafter referred to as wastewater) stored in the cooling unit 12 to the dust removing unit 14, which is provided between the cooling unit 12 and the dust removing unit 14 And may further include an exhaust line 150. The discharge line 150 may further include a flow control valve 140 for regulating the flow rate of the wastewater discharged from the cooling unit 12.

Likewise, a path provided between the cooling section 12 and the dust removing section 14 for supplying wastewater discharged from the cooling section 12 to the dust removing section 14, And a bypass line 151 for providing a bypass route. The bypass line 151 may further include a bypass valve 160 for regulating the flow rate of the wastewater discharged from the cooling unit 12.

The control unit may further include a differential pressure meter 170 provided in the cooling unit 12 and measuring the water level of the cooling unit 12. [ More specifically, the differential pressure gage 170 can measure the water level by measuring the pressure inside the cooling water tank.

In addition, it is possible to control the opening and closing of the flow rate control valve 140 on the basis of the information on the level of the cooling unit 12, which is provided in the discharge line 150 and obtained through the differential pressure meter 170, And a level controller 190 that adjusts the level of the signal.

In addition, when the water level of the cooling unit 12 reaches a dangerous level, the alarm signal is provided to the cooling unit 12 so that the waste water can be discharged from the cooling unit 12 through the bypass line 151 A level switch 180 may be further included.

 The water compression unit 15 is also connected to a dust removing unit 14 for processing dust contained in the slag supplied through the cooling unit 12 and the slag storage unit 13 via a separate supply line Can supply.

Hereinafter, the operation of the slag separating and discharging apparatus for coal gasification using the rotating body piping according to one embodiment of the present invention will be described with reference to FIG.

Slag is generated together with the syngas by the gasification reaction of coal which is carried out in the coal gasifier 11.

The generated slag is discharged from the coal gasifier 11 and supplied to the slag moving line 16. The slag is brought into contact with the high pressure water sprayed from the high-pressure water injection unit 120 before being supplied to the slag moving line 16. [ Through this process, the slag in a high temperature state becomes a water-chain slug state, which is solidified while being cooled.

At this time, since the particle size of the water-chain slug, that is, the particle size is different, the slag treatment process is different according to the particle size, so it is necessary to separate the slag according to the particle size.

With respect to the method of separating the slag, conventionally, the slag was collectively stored in the cooling water tank. Of these, slag having a large particle size sinks to the bottom of the cooling water tank, and fine slag and fly ash with a small particle size float in water or on the water of the cooling water tank. Among them, the slag having a small particle size was discharged through the outlet pipe line, thereby separating the slag by the particle size.

However, in order to solve the above-mentioned problems, according to one embodiment of the present invention shown in FIG. 1, the slag moving line 16 is provided with a rotating body pipe 200 constituting a part of the slag moving line 16, do.

That is, the rotating body pipe 200 rotates about the longitudinal axis of the rotating body pipe 200. The slag having a large particle size passes through the rotating body pipe 200 and the slag moving line 16 as it is, While the slag having a small particle size is supplied to the cooling unit 12 through the slurry formed in the rotating body pipe 200. [ The details of the work formed in the rotating body piping 200 will be described in detail with reference to FIG.

On the other hand, a rotary injection unit 130 is provided outside the rotary pipe 200, and high-pressure water is injected toward the rotary pipe 200 by the rotary injection unit 131. The high-pressure water injected through the rotary injecting unit 131 serves to cool the rotary pipe 200 heated by the slag, and at the same time, the slag formed in the rotary pipe 200 is clogged with slag having a small particle size Thereby preventing the phenomenon.

On the other hand, the high-pressure water sprayed through the high-pressure water spray unit 120 and the rotary spray unit 130 is supplied by the water compression unit 15. The high-pressure water supplied to the high- The high pressure water supplied to the spinning main injection line unit 130 to the supply main line 100 is conveyed by the high pressure water supply branch line 110. The detailed structure of the high-pressure water supply main line 100 and the high-pressure water supply branch line 110 has been described above.

The discharge line 150 provided between the cooling unit 12 and the dust removing unit 14 serves to discharge the wastewater stored in the cooling unit 12. More specifically, the level controller 190 collects information on the water level of the cooling unit 12 through the differential pressure meter 170 and controls whether the flow control valve 140 is open or closed. When the water level of the cooling section 12 reaches a certain level, the level controller 190 opens the flow rate control valve 140, thereby discharging the wastewater from the cooling section 12.

However, even if the cooling unit 12 reaches a certain level due to a malfunction of the differential pressure meter 170, the level controller 190, or the flow control valve 140, the waste water may not be properly discharged. In this case, (12) can reach a danger level beyond a certain level. To this end, the cooling unit 12 is provided with a reel switch 180. When the cooling unit 12 reaches a certain water level and reaches a danger level, an alarm signal is sent. At this time, the normally closed bypass valve The waste water can be discharged through the bypass line 151 by bypassing the discharge line 150 by opening the drain line 160. Therefore, the stability of the entire system is further improved.

FIG. 2 is an enlarged view of a rotating body piping, which is an enlarged view of a rotating body piping used in a slag separating and discharging apparatus for a coal gasification process using a rotating body piping according to an embodiment of the present invention.

The rotating body piping 200 includes a cylindrical body 201 and a cylinder 210. The rotary pipe 200 is provided with a rotary high-pressure water supply unit 220 for supplying high-pressure water supplied through the water compression unit 15 to the rotary pipe 200, Pressure water discharge unit 230 for discharging the water.

The high-pressure water discharge unit 230 is connected to the rotary high-pressure water discharge unit 230 and is supplied with the high-pressure water discharged from the rotary high-pressure water discharge unit 230, And may further include an injection unit 130.

The rotating body 200 may further include an impeller 240 which collides with the high pressure water supplied to the rotating body pipe 200. Although not shown in the drawing, And may further include bearings for allowing relative rotational movement with the slag movement line 16. [

Hereinafter, the operation of the rotating body piping 200 according to an embodiment of the present invention will be described with reference to FIG.

The rotating fluid pipe 200 is rotated by the high pressure water supplied to and discharged from the rotating fluid pipe 200. That is, the high-pressure water supplied to the rotating body pipe 200 collides with the impeller 240 provided in the rotating body pipe 200. At this time, a force is transmitted from the high-pressure water to the impeller 240, thereby rotating the cylindrical body 201.

That is, the rotating body pipe 200 including the cylindrical body 201 rotates due to the collision between the high-pressure water and the impeller 240. This high-pressure water is supplied to the water compressing unit 120 provided for the high- (15). Therefore, according to one embodiment of the present invention, there is an effect that the slag can be effectively separated without requiring a separate driving device for rotating the rotating body pipe 200.

Meanwhile, as described above, the puddings 210 are made of holes that are capable of separating the slag according to the particle size, thereby separating the slag by the particle size.

11: Coal gasifier
12: Cooling section
13: slag storage part
14: Dust removal
15: Water compression unit
16: slag moving line
100: High pressure water supply main line
110: High-pressure water supply branch line
120: High-pressure water injection unit
130: Spraying unit for rotation
140: Flow control valve
150: discharge line
151: Bypass line
160: Bypass valve
170: Differential pressure gauge
180: Level switch
190: Level controller
200: Rotor plumbing
201: Cylindrical body
210: studying
220: high pressure water supply part for rotation
230: High pressure water discharge unit
240: Impeller

Claims (10)

Coal gasifier producing synthesis gas using coal;
A slag storage part for receiving and storing slag generated in the coal gasifier;
A slag moving line connecting the slag reservoir from the coal gasifier to provide a path through which the slag is transferred to the slag storage;
A rotating body piping included in the slag moving line for separating a part of the slag to be transferred to the slag storing part; And
A cooling unit for receiving the separated slug; / RTI >
Slag Separation and Discharging System for Coal Gasification Process Using Rotating Piping. The method according to claim 1,
Wherein the rotating body piping separates a part of the slug while rotating around an axis in the longitudinal direction of the rotating body piping,
Slag Separation and Discharging System for Coal Gasification Process Using Rotating Piping. The method according to claim 1,
The rotating body piping has a multi-
Slag Separation and Discharging System for Coal Gasification Process Using Rotating Piping. The method according to claim 1,
A high pressure water injection unit provided between the coal gasifier and the slag moving line for spraying water; ≪ / RTI >
Slag Separation and Discharging System for Coal Gasification Process Using Rotating Piping. The method of claim 4,
A water compression unit for supplying water injected through the high-pressure water injection unit; And
A high-pressure water supply main line providing a path for supplying compressed water from the water compression unit to the high-pressure water injection unit; ≪ / RTI >
Slag Separation and Discharging System for Coal Gasification Process Using Rotating Piping. The method of claim 5,
In the rotary body piping,
A cylindrical body rotating about an axis in the longitudinal direction;
A rotary high-pressure water supply unit for supplying water into the rotary pipe;
A high pressure water discharging portion for discharging water from the inside of the rotating body piping; And
An impeller for transmitting a force from the high-pressure water to the cylindrical body so that the cylindrical body can be rotated by colliding with the high-pressure water supplied to the inside of the rotating body piping; / RTI >
Slag Separation and Discharging System for Coal Gasification Process Using Rotating Piping. The method of claim 6,
A rotary injection unit formed downstream of the rotary high-pressure water discharge unit for spraying water discharged from the rotary high-pressure water discharge unit to the rotary pipe; ≪ / RTI >
Slag Separation and Discharging System for Coal Gasification Process Using Rotating Piping. The method of claim 6,
A high-pressure water supply branch line branched from the high-pressure water supply main line and supplying high-pressure water to the rotation high-pressure water supply unit; Further comprising:
And supplying water to the rotating high-pressure water supply unit through the high-pressure water supply branch line,
Slag Separation and Discharging System for Coal Gasification Process Using Rotating Piping. The method according to claim 1,
A discharge line formed at one side of the cooling unit and providing a path for discharging the fluid stored in the cooling unit; And
A bypass line bypassing the discharge line to provide a path for discharging the fluid stored in the cooling unit; ≪ / RTI >
Slag Separation and Discharging System for Coal Gasification Process Using Rotating Piping. The slag generated from the coal gasifier producing the syngas using coal is transferred through the slag moving line and some of the slag moving lines are rotated about the longitudinal axis of the pipe to separate the slag according to the particle size of the slag doing,
Separation and Discharge Method of Slag in Coal Gasification Process Using Rotating Piping.
KR1020150046208A 2015-04-01 2015-04-01 Device and method for separation discharge of slag during process of gasification of coal using rotating pipe KR101616816B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111057810A (en) * 2019-11-25 2020-04-24 中国石油化工股份有限公司 Method for removing impurity iron in gasified slag

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10287886A (en) * 1997-04-11 1998-10-27 Babcock Hitachi Kk Discharging method of slag and apparatus by using the same
JPH11140464A (en) * 1997-11-05 1999-05-25 Babcock Hitachi Kk Coal gasification apparatus and slag discharge by the same apparatus
JP2004035748A (en) * 2002-07-04 2004-02-05 Nippon Steel Corp Slag discharge apparatus in gasification furnace of waste plastic and method for discharging slag by using the same
JP2013112734A (en) * 2011-11-28 2013-06-10 Mitsubishi Heavy Ind Ltd Slag discharge system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10287886A (en) * 1997-04-11 1998-10-27 Babcock Hitachi Kk Discharging method of slag and apparatus by using the same
JPH11140464A (en) * 1997-11-05 1999-05-25 Babcock Hitachi Kk Coal gasification apparatus and slag discharge by the same apparatus
JP2004035748A (en) * 2002-07-04 2004-02-05 Nippon Steel Corp Slag discharge apparatus in gasification furnace of waste plastic and method for discharging slag by using the same
JP2013112734A (en) * 2011-11-28 2013-06-10 Mitsubishi Heavy Ind Ltd Slag discharge system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111057810A (en) * 2019-11-25 2020-04-24 中国石油化工股份有限公司 Method for removing impurity iron in gasified slag
CN111057810B (en) * 2019-11-25 2021-10-08 中国石油化工股份有限公司 Method for removing impurity iron in gasified slag

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