KR101634596B1 - An apparatus for discharging gasifier slag using simplified circulation water line and a method using thereof - Google Patents

An apparatus for discharging gasifier slag using simplified circulation water line and a method using thereof Download PDF

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Publication number
KR101634596B1
KR101634596B1 KR1020150119486A KR20150119486A KR101634596B1 KR 101634596 B1 KR101634596 B1 KR 101634596B1 KR 1020150119486 A KR1020150119486 A KR 1020150119486A KR 20150119486 A KR20150119486 A KR 20150119486A KR 101634596 B1 KR101634596 B1 KR 101634596B1
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KR
South Korea
Prior art keywords
slag
circulating water
tank
water line
line
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KR1020150119486A
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Korean (ko)
Inventor
박성구
이건주
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두산중공업 주식회사
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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
    • C10J3/02—Fixed-bed gasification of lump fuel
    • C10J3/20—Apparatus; Plants
    • 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
    • C10J3/82—Gas withdrawal means
    • 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
    • C10J2300/00—Details of gasification processes
    • C10J2300/16—Integration of gasification processes with another plant or parts within the plant
    • C10J2300/164—Integration of gasification processes with another plant or parts within the plant with conversion of synthesis gas
    • C10J2300/1643—Conversion of synthesis gas to energy
    • C10J2300/1653—Conversion of synthesis gas to energy integrated in a gasification combined cycle [IGCC]
    • 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
    • C10J2300/00—Details of gasification processes
    • C10J2300/16—Integration of gasification processes with another plant or parts within the plant
    • C10J2300/1671—Integration of gasification processes with another plant or parts within the plant with the production of electricity
    • C10J2300/1675—Integration of gasification processes with another plant or parts within the plant with the production of electricity making use of a steam turbine
    • 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]
    • 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 discharging slag of coal gasifier after treating the same. The present invention further relates to a discharging method. More specifically, the present invention relates to an apparatus for discharging coal gasifier slag, which comprises a simplified circulation water line including a first circulation water line and a second circulation water line coupled to the first circulation water line and thus ensures omission of facilities including additional pumps, valves, and pipes, thereby bringing reduction in production costs of facilities. The present invention further relates to a discharging method.

Description

Technical Field [0001] The present invention relates to an apparatus and a method for discharging a coal gasifier slag having a simplified circulation water line,

The present invention relates to an apparatus for discharging and processing slag of a coal gasifier, and more particularly, to an apparatus and a method for discharging slag of a coal gasifier by constructing a simplified circulating water line including a first circulating water line and a second circulating water line connected thereto, The present invention relates to a discharge device and a discharge method of a coal gasifier slag capable of omitting equipment such as a pump, a valve, and a pipe.

In recent years, regulations for carbon dioxide gas have been strengthened and methods for preventing environmental pollution have been demanded. Therefore, emission of pollutants such as carbon dioxide and other gases such as global warming gas, sulfur oxides (SO x ) and nitrogen oxides (NO x ) The research on the technology to reduce the number of people is getting attention.

Among them, coal gasification combined cycle (IGCC), which is a method of generating clean and efficient energy by using gasification technology instead of pulverized coal-fired thermal power generation, is in the spotlight. (Syngas) by burning incomplete combustion of hydrocarbon feedstock such as coal to generate energy such as electricity by operating a gas turbine or a steam turbine.

The coal gasification combined cycle power plant using the coal gasification combined cycle power generation system can reduce the amount of sulfur oxides, nitrogen oxides, and dusts to a great extent as compared with the existing coal burning power generation system.

Meanwhile, the coal gasification combined cycle power plant includes a coal gasifier such as a coal gasification reactor for extracting coal gas by reacting pulverized coal and an oxidizer at a high pressure. The coal gasifier includes fuel, air or oxygen , An apparatus for converting an incomplete combustion reaction of a mixture of steam, limestone or other solids such as fluxant into a product of partial combustion gas and slag, called syngas.

At this time, the ash generated from the coal gasifier is collected not in the form of dust but in the form of slag after being melted. Therefore, it is environmentally safe, and the sulfur (S) element produced in the slag and desulfurization process is recovered It can be used as an economical by-product.

However, the high-temperature molten slag generated in the coal gasifier must be discharged through an appropriate treatment process. Conventionally, the slag of the coal gasifier is treated and discharged using a device schematically shown in FIG.

The high temperature slag generated in the coal gasifier A is collected in the slag bath 1 and the collected slag is mixed with the slag accumulator vessel together with the circulating water supplied to the slag water tank 1, (2).

At this time, the circulating water in the slag tank 2 is recovered and supplied to the slag water tank 1 through the first circulating water line a, and used to cool the slag water tank 1.

On the other hand, when the slag and the circulating water are accumulated in the slag accumulating tank 2 for a predetermined amount or for a predetermined time, the valve of the pipe connected to the slag sluice vessel 3 located under the slag accumulating tank 2 (11) is opened, and a part of the slag and the circulating water moves to the slag sloshing tank (3).

At this time, the circulating water supplied to the slag slurry tank 3 is recovered and supplied to the slag tank 2 through a separate circulating water line (d), and the slag of the slag tank 2 is smoothly It is used to pressurize to be discharged.

The process in which the valve 11 of the pipe connecting the slag accumulation tank 2 and the slag slurry tank 3 is closed and the slag and the circulating water are accumulated in the slag accumulation tank 2 is referred to as a disconnection mode The process of opening the valve 11 and discharging a part of the slag and the circulating water to the slag sloshing tank 3 is referred to as a connected mode.

As described above, conventionally, a circulating water line (a) for recovering circulating water in the slag collecting tank 2 and supplying the circulating water to the slag water tank 1 to cool the slag water tank 1, (4) and (8), which provide power to the movement of the circulating water, are also provided to the slag collecting tank (2) by separately circulating water in the circulating water line It was necessary separately for each line, and such a pump is an expensive device costing hundreds of millions of yen.

On the other hand, in the separation mode, there is no circulating water supplied to the slag sloshing tank 3, so there is no need to recycle the circulating water from the slag sloshing tank 3 to the slag collecting tank 2. However, The energy efficiency is problematic, and if the pump is idle without circulation, the problem of pump overheating can occur.

Therefore, conventionally, the additional circulating water line e and the valve 42 are provided to constitute a closed circuit of the circulating water, so that when the separation mode is selected, the circulating water line e is circulated by the pump 8 Which has the problem that it is still ineffective in terms of an additional energy source for circulating the circulation water line e and additional facilities as described above.

In order to solve the problems of the prior art described above, the present invention provides a method for treating and discharging slag of a coal gasifier, comprising the steps of: circulating a simplified circulating water line including a first circulating water line and a second circulating water line connected thereto And it is an object of the present invention to provide an apparatus and a method for discharging coal gasifier slag, which can omit facilities such as additional pumps, valves and piping.

Disclosure of Invention Technical Problem [8] Accordingly, the present invention has been made in view of the above problems, and it is an object of the present invention to provide a device for treating and discharging slag of a coal gasifier (A) 1), a slag accumulating tank (2) connected to a lower portion of the slag water tank (1) and storing the collected slag and circulating water, A slag slurry tank 3 supplied with circulating water and slag accumulated when the slag tank 2 communicates with the slag tank 2 and a pump 4 providing power for moving the circulating water, A first circulating water line (a) for allowing the circulating water to be recovered from the first circulating water line (a) and for supplying the circulating water to the slag water tank (1) And the slaver And a second circulating water line (b) for collecting circulated water from the sloshing tank (3) and joining the circulating water passing through the first circulating water line (a) to be recovered to the slag water tank (1) The present invention provides a device for discharging coal gasifier slag in which several lines are simplified.

At this time, it is preferable that the second circulating water line (b) is connected on the first circulating water line (a) by a buffer distance (l) or more in the front end direction of the pump (4).

The ratio of the pipe diameter of the first circulating water line (a) to the diameter of the second circulating water line (b) is preferably 1: 0.8 to 1.2.

The apparatus for discharging the coal gasifier slag of the present invention may further include a cooler 5 installed on the first circulating water line a for cooling the circulating water through heat exchange with the cooling water.

At this time, a temperature sensor 21 provided at the front end of the cooler 5, a coolant valve 15 installed on a line f to which cooling water is supplied to the cooler 5, The cooling water valve 15 may be further opened to increase the flow rate of the cooling water supplied to the cooler 5 if the value exceeds a set value.

In particular, the control of the controller 22 may be performed by a PID (Proportional Integral Derivative) control method.

The apparatus for discharging the coal gasifier slag of the present invention further includes a third circulating water line c connecting the first circulating water line a at the rear end of the pump 4 and the slagging tank 2 The third circulating water line c may be configured to collect a portion of the circulating water passing through the first circulating water line a and supply the circulating water to the slag collecting tank 2.

The present invention provides a method of treating and discharging slag of a coal gasifier (A) according to another embodiment. Specifically, the method comprises steps S1) and S1) of collecting high temperature slag in circulating water supplied to the slag water tank (1) The collected slag and circulating water are accumulated in a slag collecting tank 2 connected to the lower portion of the slag water tank 1, the circulating water in the slag collecting tank 2 is recovered and the first circulating water line a A slag slurry tank 3 connected to the lower portion of the slag tank 2 with slag accumulated in the slag tank 2 is supplied to the slag tank 1 through the slag tank 3, (S4), and the circulating water in the slag sloshing tank (3) is recovered and joined to the circulating water passing through the first circulating water line (a) through the second circulating water line (b) (S5) supplied to the slag water tank (1), wherein the slag tank (S4) in which the slag accumulated in the slag slurry tank (2) is supplied to the slag sloshing tank (3) and the step (S5) in which the circulating water in the slag sloshing tank (3) is recovered and supplied to the slag water tank The method of discharging coal gasifier slag in which the circulation water line is simplified is characterized in that it is performed intermittently with a constant cycle.

The method for discharging the coal gasifier slag of the present invention may further include a step (S6) in which the circulating water is cooled through heat exchange with the cooling water while passing through the cooler (5) provided on the first circulating water line (a) ,

At this time, the cooling step S6 may be controlled by increasing the flow rate of the cooling water supplied to the cooler when the temperature of the circulating water passing through the front end of the cooler 5 exceeds a set value .

In particular, the control may be performed by a PID (Proportional Integral Derivative) control method.

The method of discharging the coal gasifier slag of the present invention may further include a step of recovering a part of the combined circulating water and supplying it to the slag collecting tank 2 through the third circulating water line c .

According to an embodiment of the present invention, there is provided an apparatus and method for treating and discharging slag of a coal gasifier, comprising a simplified circulating water line including a first circulating water line and a second circulating water line connected thereto, By securing the second circulating water line to the first circulating water line by securing the buffer distance to the pump, it is possible to omit facilities such as pumps, valves and piping which are additionally required when the circulating water line is separately constructed, There is an effect that it can be saved.

Figure 1 schematically illustrates an apparatus for treating and discharging conventional coal gasifier slag.
FIG. 2 is a schematic view showing a discharge device for a coal gasifier slag in which a circulating water line is simplified according to an embodiment of the present invention.
3 schematically shows a discharge device for a coal gasifier slag in which a circulating water line further comprising a cooler 5, a third circulating water line c, etc. is simplified according to another embodiment of the present invention.
FIG. 4 schematically illustrates each step of a method for discharging a coal gasifier slag in which a circulating water line is simplified according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. Prior to the description, terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary meanings and should be construed in accordance with the technical concept of the present invention.

Throughout this specification, when an element is referred to as "including" an element, it is understood that it may include other elements as well, without departing from the other elements unless specifically stated otherwise.

The terms "first "," second ", and the like are intended to distinguish one element from another, and the scope of the right should not be limited by these terms. For example, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component.

In each step, the identification code is used for convenience of explanation, and the identification code does not describe the order of the steps, and each step may be performed differently from the stated order unless clearly specified in the context. have. That is, each of the steps may be performed in the same order as described, or may be performed substantially concurrently or in the reverse order.

Throughout this specification, when a member is located on another member "upper" or "lower", this includes not only when a member is in contact with another member, but also when another member exists between the two members.

Throughout this description, the term "shear" of a particular member means any direction in which any fluid enters a particular member, and similarly the term " It means all directions.

It should be noted that, in adding reference numerals to the constituent elements of the drawings, the same constituent elements are denoted by the same reference numerals whenever possible, even if they are shown in different drawings. In the following description of the embodiments of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the difference that the embodiments of the present invention are not conclusive.

When a component is described as being "connected", "coupled", or "connected" to another component, the component may be directly connected or connected to the other component, Quot; may be "connected," "coupled," or "connected. &Quot;

Throughout this specification, when a member is " on "another member, it can be interpreted that the member is positioned to pass through the other member, Can be interpreted.

FIG. 2 is a schematic view showing a discharge device for a coal gasifier slag in which a circulating water line is simplified according to an embodiment of the present invention.

As shown in FIG. 2, the apparatus for treating and discharging slag of a coal gasifier (A) comprises a slag water tank (1) in which high temperature slag is collected in supplied circulating water, a slag water tank The slag collecting tank 2 is connected to the lower portion of the slag collecting tank 2 to accumulate the circulating water and the collected slag, and the slag collecting tank 2 is connected to the lower portion of the slag collecting tank 2 so as to intermittently communicate with the slag collecting tank 2 A slag slurry tank 3 supplied with circulating water and a pump 4 supplying power to the movement of the circulating water so that the circulating water is recovered from the slag tank 2, 1), a first circulating water line (a) which is connected to the first circulating water line (a) in front of the pump (4) and the slag sloshing tank (3) (3), the circulating water is recovered And a second circulating water line (b) which is joined to the circulating water passing through the first circulating water line (a) and recovered to the slag water tank (1).

The high temperature flowing slag generated in the coal gasifier (A) is collected in the circulating water supplied to the slag bath (1) through the slag tap, do.

The granulated slag moves together with the circulating water to the slag accumulator vessel 2, which may be crushed finely while passing through the crusher 7.

At this time, the circulating water supplied to the slag water tank 1 serves to cool the slag water tank 1 in which the high-temperature slag is collected to raise the temperature.

The slag and the circulating water which have moved to the slag collecting tank 2 are accumulated in the slag collecting tank 2 at this time the circulating water in the slag collecting tank 2 is recovered and the slag and the circulating water are discharged through the first circulating water line a, Is supplied to the water tank 1 and is used for cooling the slag water tank 1 as described above and a pump 4 is provided on the first circulating water line a to provide power for movement of the circulating water.

On the other hand, if a certain amount of slag and / or circulating water is accumulated in the slag accumulating tank 2 based on weight, pressure, or the like, or the slag and / or circulating water is accumulated for a predetermined time, A slag sluice vessel 3 is connected to supply a part of the slag and the circulating water to the slag slurry tank 3. The slag slurry tank 2 and the slag slurry tank 3 are connected to each other, The above process can be carried out through the operation and control of the connection valve 11 provided on the pipe connecting the exhaust pipe 11a and the exhaust pipe 11b.

The time during which the slag and / or the circulating water is discharged from the slag collecting tank 2 can be variably set as needed, but it is preferable that the process for discharging the slag and / have.

The circulating water in the slag sloshing tank 3 supplied together with the slag is recovered while the slag accumulation tank 2 and the slag sloshing tank 3 are connected and the slag is supplied to the slag sloshing tank 3 Is supplied to the slag water tank 1 through the second circulating water line b and is supplied to the slag tank 2 through the slag water tank 1 to pressurize the slag so as to smoothly discharge the slag.

In this case, the second circulating water line (b) is provided to connect the first circulating water line (a) at the front end of the pump (4) and the slag sloshing tank (3) (B, a) sequentially through the circulating water lines (b, a) to be recovered from the slag sloshing tank (3) to the slag water tank (1).

That is, the second circulating water line (b) is configured not to be separately configured but merged with the first circulating water line (a) so that the pump, valve, piping, and the like must be additionally provided when the circulating water line is separately configured Can be solved.

Unlike the prior art, the circulating water recovered from the slag sloshing tank 3 is not directly supplied to the slag tank 2 but is supplied to the slag tank 2 through the slag tank 1, The total amount of circulating water flow is not different from the total amount in the prior art.

In order to smoothly flow both the circulating water recovered from the slag collecting tank 2 and the circulating water recovered from the slag sloshing tank 3 by the single pump 4 as described above, A point at which the second circulation water line b is connected to the first circulation water line a is separated from the first circulation water line a by a distance equal to or greater than the buffer distance l in the front end direction of the pump 4 Can be configured.

In this case, the buffering distance (ℓ) means a minimum distance from the front end of the pump (4), that is, a certain angle in the suction direction of the pump, so that the fluid flowing in the bending direction can receive sufficient power from the pump do.

Although the cushion distance (l) varies depending on the specific pump type and the bending angle of the pipe, it is formed within a range of 1.5 to 20 m in a facility used in a typical coal gasification process.

Since the circulating water in the slag sloshing tank 3 is a part of the circulating water in the slag collecting tank 2 and is recovered in the slag sloshing tank 3 and the second circulating water line b, Is smaller than the circulating water passing through the first circulating water line (a) while being recovered in the slag collecting tank (2).

Therefore, even if the pump 8 used in the conventional circulating water line d is removed and only the pump 4 installed on the first circulating water line a is used, an additional capacity increase of the pump is accompanied There is an advantage that there is no need.

However, the difference in pipe diameter due to the flow rate difference causes a problem that a vortex may occur in the flow of the circulating water at the point where the first circulating water line (a) and the second circulating water line (b) are connected, It is preferable that the pipe diameters of the first and second circulating water lines a and b are similar to each other and the ratio of the pipe diameter of the first circulating water line and the second circulating water line is set to 1: .

Flow control valves 12 and 13 may be additionally provided on the first and second circulating water lines a and b and may be connected to the first and second circulating water lines a and b through operation and control of the flow control valves 12 and 13, And the flow rate of the circulating water passing through the two circulating water lines (a, b) can be adjusted.

On the other hand, the slag supplied to the slag sloshing tank 3 is supplied to the dewatering tank 31 for removing moisture in the slag or discharged to the outside of the coal gasifier.

3 schematically shows a discharge device for a coal gasifier slag in which a circulating water line further comprising a cooler 5, a third circulating water line c, etc. is simplified according to another embodiment of the present invention.

The apparatus for discharging the coal gasifier slag of the present invention may further comprise a cooler 5 installed on the first circulating water line a and supplied from the separate cooling water source 6 as the cooler 5 A heat exchanger that cools the circulating water through heat exchange with the cooling water may be used.

The cooler 5 is configured to maintain the temperature of the circulating water at an appropriate level so that the circulating water can normally perform the role of cooling the slag water tank 1.

The apparatus for discharging the coal gasifier slag further includes a temperature sensor 21 installed at the front end of the cooler 5 and a cooling water valve 15 provided on the line f to which cooling water is supplied to the cooler 5, And a control unit (22) for controlling the flow rate of the cooling water supplied to the cooler (5) by further opening the coolant valve (15) when the measured value of the temperature sensor (21) .

That is, although the temperature of the circulating water recovered from the slag sloshing tank 3 is about 50 ° C and the flow rate is small, it does not greatly affect the temperature of the circulating water recovered from the slag collecting tank 2, It is possible to smoothly perform the role of cooling the circulating water in the slag water tank 1 by controlling the degree to which the circulating water is cooled in the cooler 5 based on the temperature of the circulating water.

At this time, the cooler 5 is preferably located at the rear end of the pump 4, but is not limited thereto.

The controller 22 may be controlled by a control method such as P (Proportional) control or PI (Proportional Integral) control, and preferably a PID (Proportional Integral Derivative) control method.

The present invention further includes a third circulating water line (c) connecting the first circulating water line (a) at the rear end of the pump (4) and the slag collecting tank (2) .

The third circulating water line (c) collects a part of the circulating water passing through the first circulating water line (a) and supplies it to the slagging tank (2) 3, and the circulating water passing through the second circulating water line (b) is supplied directly through the slag water tank (1) without being directly supplied to the slag collecting tank (2) This is a structure to supplement the phenomenon that exists.

A flow control valve 16 may be additionally provided on the third circulation water line c and the third circulation water line c may be provided by operating and controlling the flow control valve 16 depending on whether additional pressurization is required. The flow rate of the circulating water directly recovered to the slag collecting tank 2 can be adjusted.

In order to prevent the circulating water from circulating through the slag discharging device and accumulating contaminants, bleed-off may be performed to reduce the concentration ratio by discharging a part of the circulating water to the outside at regular intervals. Supplementary water may be supplied to the slag accumulating tank 2 and the slag slurry tank 3 from the replenishment water supply source 32 to supplement the amount of the circulating water reduced due to the bleed off, The supply amount of the make-up water can be adjusted through the flow control valves 17 and 18.

FIG. 4 schematically illustrates each step of a method for discharging a coal gasifier slag in which a circulating water line is simplified according to an embodiment of the present invention.

The present invention relates to a method of treating and discharging slag of a coal gasifier (A), comprising the steps of: (S1) collecting high temperature slag in circulating water supplied to the slag water tank (1) A step S2 of accumulating in the slag tank 2 connected to the lower part of the slag water tank 1 the circulating water in the slag tank 2 is recovered and the slag water in the slag water tank 1 A step S4 of supplying the slag accumulated in the slag accumulating tank 2 to the slag slurry tank 3 connected to the lower portion of the slag accumulating tank 2 together with the circulating water, And the circulating water in the slag sloshing tank 3 is collected and joined to the circulating water passing through the first circulating water line a through the second circulating water line b and supplied to the slag water tank 1 Step S5 may be included.

In this case, the steps S4 and S5 may be performed intermittently with a predetermined period. The step S4 and S5 may be repeated intermittently without a predetermined period. It means.

The process of performing steps S1 to S3 is referred to as a disconnection mode and the process of performing steps S1 to S5 is referred to as a connection mode. The separation mode is a mode in which slag sloshing ), And the connection mode is a process performed while the slag moves from the slag accumulation tank 2 to the slag sloshing tank 3.

In addition, the step S4 and step S5 are performed intermittently with a constant period means that the separation mode and the connection mode are alternately repeated.

The method for treating a coal gasifier slag of the present invention may further comprise a step (S6) in which circulating water is cooled through heat exchange with cooling water while passing through a cooler (5) installed on the first circulating water line (a) At this time, if the temperature of the circulating water passing through the front end of the cooler 5 exceeds the preset value, the flow rate of the cooling water supplied to the cooler 5 may be controlled to increase.

Also, the control may be performed by a control method such as P (Proportional) control or PI (Proportional Integral) control, and preferably, a PID (Proportional Integral Derivative) control method.

Meanwhile, a part of the combined circulating water may be recovered and supplied to the slag collecting tank 2 through the third circulating water line c, And is a constitution for supplementing the pressurizing action of the circulating water recovered from the loose vessel 3 and passing through the second circulating water line b to the slag collecting tank 2.

The present invention is not limited to the above-described specific embodiment and description, and various changes and modifications may be made by those skilled in the art without departing from the scope of the present invention as claimed in the claims. And such modifications are within the scope of protection of the present invention.

A: Coal gasifier
1: Slag tank
2: slag aggregation tank
3: Slag sloshing
4: Pump
5: Cooler
6: Coolant source
7: Grinder
8: Pump
11: Connecting valve
12, 13, 16, 17, 18: Flow control valve
14: Discharge valve
15: Cooling water valve
21: Temperature sensor
22:
31: Dehydration tank
32: Replenishing water source
41, 42, 43: valve
a: 1st circulating water line
b: second circulating water line
c: Third circulating water line
d, e: circulating water line
ℓ: Cushion distance

Claims (12)

An apparatus for treating and discharging slag of a coal gasifier (A)
A slag water tank 1 in which high temperature slag is collected in the circulating water to be supplied;
A slag collecting tank 2 connected to a lower portion of the slag water tank 1 and accumulating collected slag and circulating water;
A slag slurry tank 3 connected to the lower part of the slag tank 2 so as to be intermittently switched to communicate with the slag tank 2 and supplied with slag and circulating water accumulated when the slag tank 2 is communicated with the slag tank 2;
A first circulating water line (a) for circulating water recovered from the slag collecting tank (2) and supplied to the slag water tank (1), including a pump (4) for supplying power to the movement of circulating water; And
Wherein the first circulation water line (a) before the pump (4) and the slag sloshing tank (3) are connected to each other so that the circulation water is recovered from the slag sloshing tank (3) And a second circulating water line (b) joined to the circulating water passing through the line (a) so as to be recovered to the slag water tank (1). The method according to claim 1,
Characterized in that the second circulating water line (b) is connected on the first circulating water line (a) by a buffer distance (l) or more in the front end direction of the pump (4) Of the coal gasifier slag. The method according to claim 1,
Wherein the ratio of the diameter of the first circulating water line (a) to the diameter of the second circulating water line (b) is 1: 0.8 to 1.2. The method according to claim 1,
Further comprising a cooler (5) installed on the first circulating water line (a) for cooling the circulating water through heat exchange with the cooling water, wherein the circulating water line is simplified. The method of claim 4,
A temperature sensor 21 installed at a front end of the cooler 5;
A cooling water valve (15) installed on a line (f) to which cooling water is supplied to the cooler (5); And
And a control unit 22 for controlling the cooling water valve 15 to increase the flow rate of the cooling water supplied to the cooler 5 when the measured value of the temperature sensor 21 exceeds a predetermined value, Further comprising: a discharge device for the coal gasifier slag in which the circulation water line is simplified. The method of claim 5,
Wherein the control unit (22) is controlled by a PID (Proportional Integral Derivative) control method, wherein the circulation water line is simplified. The method according to claim 1,
Further comprising a third circulating water line (c) connecting the first circulating water line (a) at the rear end of the pump (4) and the slagging tank (2)
Wherein the third circulating water line (c) recovers a part of the circulating water passing through the first circulating water line (a) and supplies it to the slag collecting tank (2). Discharging device of coal gasifier slag. A method for treating and discharging a slag of a coal gasifier (A)
A step S1 of collecting high-temperature slag in the circulating water supplied to the slag water tank 1;
Accumulating the collected slag and circulating water in the slag tank 2 connected to the lower portion of the slag water tank 1;
(S3) in which the circulating water in the slag tank (2) is recovered and supplied to the slag water tank (1) through the first circulating water line (a);
(S4) the slag accumulated in the slag accumulating tank (2) is supplied to the slag slurry tank (3) connected to the lower portion of the slag accumulating tank (2) together with the circulating water; And
The circulating water in the slag sloshing tank 3 is collected and joined to the circulating water passing through the first circulating water line a through the second circulating water line b and supplied to the slag water tank 1 (S5)
A step S4 of supplying slag accumulated in the slag tank 2 to the slag sloshing tank 3 and a step of recovering circulating water in the slag sloshing tank 3 and supplying the slag to the slag tank 1 (S5) is performed intermittently with a predetermined period, wherein the circulating water line is simplified. The method of claim 8,
Further comprising a step (S6) wherein the circulating water is cooled through heat exchange with the cooling water while passing through the cooler (5) installed on the first circulating water line (a), wherein the circulating water line is discharged from the simplified coal gasifier slag Way. The method of claim 9,
The step of cooling (S6)
Characterized in that the circulating water line is controlled in such a manner that the flow rate of the cooling water supplied to the cooler is increased when the temperature of the circulating water passing through the front end of the cooler (5) exceeds the set value. Discharge method of flue gas. The method of claim 10,
Wherein the control is carried out in a PID (Proportional Integral Derivative) control method, wherein the circulation water line is simplified. The method of claim 8,
Wherein a portion of the combined circulating water is recovered and fed to the slag collecting tank (2) through a third circulating water line (c).
KR1020150119486A 2015-08-25 2015-08-25 An apparatus for discharging gasifier slag using simplified circulation water line and a method using thereof KR101634596B1 (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0554440B2 (en) * 1985-09-09 1993-08-12 Dynic Corp
JP4554440B2 (en) 2005-06-02 2010-09-29 日揮株式会社 Gasification combined power generation facility and control method thereof
KR20110034002A (en) * 2008-07-15 2011-04-04 우데 게엠베하 Device for the removal of clinker from a coal gasification reactor
KR101170070B1 (en) * 2009-12-21 2012-08-01 한국전력공사 Coal gasification that By measuring the amount of slag of High temperature and high pressure exhaust-bath
JP5721612B2 (en) * 2011-11-28 2015-05-20 三菱重工業株式会社 Slag discharge system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0554440B2 (en) * 1985-09-09 1993-08-12 Dynic Corp
JP4554440B2 (en) 2005-06-02 2010-09-29 日揮株式会社 Gasification combined power generation facility and control method thereof
KR20110034002A (en) * 2008-07-15 2011-04-04 우데 게엠베하 Device for the removal of clinker from a coal gasification reactor
KR101170070B1 (en) * 2009-12-21 2012-08-01 한국전력공사 Coal gasification that By measuring the amount of slag of High temperature and high pressure exhaust-bath
JP5721612B2 (en) * 2011-11-28 2015-05-20 三菱重工業株式会社 Slag discharge system

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