KR101447032B1 - Coal and Flux Supply Apparatus of Integrated gasification combined cycle power plant, and Supply Method thereof - Google Patents
Coal and Flux Supply Apparatus of Integrated gasification combined cycle power plant, and Supply Method thereof Download PDFInfo
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- KR101447032B1 KR101447032B1 KR1020110147819A KR20110147819A KR101447032B1 KR 101447032 B1 KR101447032 B1 KR 101447032B1 KR 1020110147819 A KR1020110147819 A KR 1020110147819A KR 20110147819 A KR20110147819 A KR 20110147819A KR 101447032 B1 KR101447032 B1 KR 101447032B1
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- 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]
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- 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]
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Abstract
The coal and additive supply method of the gasification plant according to an embodiment of the present invention is a coal and additive supply method of a gasification plant in which the coal and the additive are respectively transported to a gasifier by moving to a conveyor, The composition of the mixture is measured in real time using a fluorescent X-ray analyzer in the state of measuring the composition of the additive in real time using a fluorescent X-ray analyzer and the transferred coal and additives in a mixed state. Based on the measured results, And estimating the minimum operating temperature and the maximum operating temperature of the gasifier considering the slagging property and comparing the operating temperature of the actual gasifier with the predicted minimum operating temperature and the maximum operating temperature to determine whether the coal or additive The efficiency of the entire plant is improved By maximizing the calorific value of the syngas, the power generation can be maximized.
Description
One embodiment of the present invention relates to a feeder for feeding coal and additives to a gasification plant and a feed method.
The Integrated Gasification Combined Cycle (IGCC) technology refers to gasification of coal, purification of the coal gas, and combined power generation of the purified coal gas as fuel.
Currently, many research institutes around the world are working on the development of various clean fuels to solve the problem of depletion of energy resources and environmental problems. Particularly, in order to overcome the problem of limited resources, the development of new and renewable energy field is being promoted all over the world, among which IGCC technology is also in the field of renewable energy.
The volatile matter and fixed carbon in the coal that is input to the gasifier are converted into syngas, but most of the ash is converted to molten slag and discharged to the bottom of the gasifier.
Since the molten slag discharged to the lower part of the gasifier causes the wall slag layer defects when the fluidity is low and the clogging of the discharge port is high, it is required to operate the gasifier at a specific temperature.
Therefore, as one of the measures for this, a method of supplying coal and additives to the gasifier at an appropriate ratio can be considered.
One object of the present invention is to provide a more efficient way of supplying coal and additives to the gasifier.
To achieve these and other advantages and in accordance with the purpose of the present invention, as embodied and broadly described herein, there is provided a method of supplying coal and additives to a gasification plant, the coal and additive being supplied to a gasifier, In the feeding method, the step of measuring the composition of coal or additive transferred from each conveyor in real time using a fluorescent X-ray analyzer and the step of measuring the composition in real time using a fluorescent X- , The composition of the mixture is measured and the minimum operating temperature and the maximum operating temperature of the gasifier considering the slagging property are estimated based on the measured result and the operation temperature of the actual gasifier is compared with the predicted minimum operating temperature and maximum operating temperature , Controlling the amount of coal or additive transferred to each conveyor belt .
According to one embodiment of the present invention, controlling the amount of coal or additive may be performed by controlling the conveying speed of each conveyor to control the amount of coal or additive.
Further, in order to realize the above-described object, another embodiment of the present invention is a method for controlling a coal gasifier, comprising: a plurality of silos connected by a conveyor to supply coal or an additive to a gasifier; The minimum operating temperature and the maximum operating temperature of the gasifier are predicted based on the measured results of the fluorescent X-ray analyzer and the fluorescent X-ray analyzer, and compared with the operating temperature of the actual gasifier, And a control unit for determining an input amount of the coal or additive to be supplied to the gasification plant.
According to an embodiment of the present invention, a fluorescent X-ray analyzer formed in the mixing conveyor is further provided so as to analyze the composition of the mixed conveyor and the mixed coal and additive mixture in which the coal and additives supplied to the conveyor are mixed can do.
The coal and additive feeder of the gasification plant according to at least one embodiment of the present invention configured as described above can reduce the maintenance cost of the gasifier wall by preventing the gasifier wall from overheating by maintaining the optimum gasifier operating temperature can do.
In addition, it is possible to maximize power production by improving the efficiency of the entire plant and maximizing the calorific value of the syngas.
By operating under optimum operating conditions, it is possible to minimize the operation cost by reducing the injection amount of coal as fuel and the injection amount of oxygen necessary for gasification.
By optimizing the amount of the additive, the consumption amount of the additive can be reduced to minimize the amount of the discharged slag, and the cost of the additive and the cost of slag treatment can be reduced.
1 is a conceptual view of a coal and additive feeder of a gasification plant according to an embodiment of the present invention;
2 is a flow chart showing an example of a method of supplying coal and additives for a gasification plant according to an embodiment of the present invention;
3 is in connection with an embodiment of the present invention, real-time batch analysis using the data, four-component system for the ash to be carried out in the process of predicting the temperature Yongyu (SiO 2 -Al 2 O 3 -FeO -CaO) solid-liquid Phase Diagram.
BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an apparatus and a method for supplying coal and an additive of a gasification plant according to the present invention will be described in detail with reference to the drawings. The suffix "module" and " part "for the components used in the following description are given or mixed in consideration of ease of specification, and do not have their own meaning or role. In the present specification, the same or similar reference numerals are given to different embodiments in the same or similar configurations. As used herein, the singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise.
1 is a conceptual diagram of a coal and additive feeder of a gasification plant according to an embodiment of the present invention.
In general, the gasifier is supplied with calcium carbonate or silica additive (Flux) which regulates the fluid temperature of the slag for smooth discharge of the slag as well as oxygen, coal and steam necessary for the gasification reaction.
In general, the calcium carbonate additive is added to lower the slag melting temperature and the silica additive is added to increase the viscosity when the melt slag viscosity is predicted too low. 60 to 70% of the coal ash and calcium carbonate or silica additives contained in the fuel are discharged to the lower part of the gasifier in the form of molten slag at a high temperature, and the remaining 30 to 40% are collected in the fly ash collecting facility at the downstream of the gasifier.
The molten slag discharged to the bottom shows a great difference in fluidity depending on the ash composition and the operating temperature. In other words, when the fluidity is low, clogging of the discharge port causes a wall slag layer defect when the fluidity is high. Therefore, it is important to operate the gasifier in a specific temperature range to prevent this.
Therefore, a mixed plant equipment for mixing coal and additives can be considered. It is possible to improve the gasification characteristics by improving the characteristics of the coal, maintaining the calorific value appropriately through the mixing of the coal, and by appropriately mixing the high sulfur and low sulfur carbons, thereby maintaining the economical exhaust lending tolerance standard .
In addition, it is possible to reduce the fuel purchase cost by minimizing the addition of additives and leveling the calorific value and the volatile content through the mixing of the carbon black and the low carbon.
For the determination of slagging property during the mixing, ash composition and oil temperature should be analyzed such as SiO 2 , Al 2 O 3 , Fe 2 O 3 , CaO, MgO, Na 2 O, K 2 O and TiO 2 . Analysis of coal ash composition and oil temperature was generally carried out in a separate laboratory after coal sampling and pretreatment.
According to the present invention, it is possible to control the coal and the additive supplied to the gasifier by analyzing the ash in real time without pretreatment of the coal.
A coal and additive feeder for a gasification plant according to an embodiment of the present invention includes a silo, a fluorescent X-ray analysis device and a control part.
The silos are formed in a plurality and are connected to the gasifier by a conveyor to supply coal or additives to the gasifier.
The fluorescent X-ray analyzer can be placed on each conveyor to analyze the composition of the coal or additive being conveyed.
The control unit predicts the minimum operation temperature and the maximum operation temperature of the gasifier based on the measurement result of the fluorescent X-ray analysis apparatus and compares the operating temperature of the gasifier with the operation amount of the coal or additive .
At this time, a fluorescence X-ray analysis apparatus (XRF) can be arranged as a real-time ash analysis apparatus in a region where coal and additives are mixed and transported, as well as the outlet of coal, calcium carbonate and silica additive silos.
2 is a flow chart showing an example of a method of supplying coal and additives for a gasification plant according to an embodiment of the present invention.
The method of supplying the coal and the additive of the gasification plant is a step of measuring the composition of the coal or the additive transferred from each conveyor in real time using a fluorescent X-ray analyzer and the step of mixing the transferred coal and the additive, A method for estimating the minimum operating temperature and maximum operating temperature of the gasifier considering the slagging property based on the measured results, and a step for estimating the operating temperature of the gasifier and the predicted minimum operating temperature And comparing the maximum operating temperature to control the amount of coal or additive transferred to each conveyor belt.
The controlling of the amount of coal or additive may be performed by controlling the conveying speed of each conveyor to control the amount of coal or additive.
Referring to FIG. 2, a method of supplying coal and additives of the gasification plant will be described in detail.
The Blending Ratio
The composition data of the mixed ash measured in real time are used as predictive data of the minimum operating temperature (16) and the maximum operating temperature (17) required for smooth slag discharge through the ash lubrication temperature prediction process (15). At this time, the minimum operating temperature is a value obtained by adding the operation margin (α, for example, 100 ° C.) to the leaning oil temperature estimated in the leaning oil temperature predicting process.
In addition, the maximum operating temperature is a value reflecting the temperature at which the liquid viscosity of 20% of the liquid viscosity value of the ash corresponding to the operation temperature predicted by the leaning oil temperature predicting process.
The final operating predicted temperature (18), taking into consideration the slagging properties of the mixed ash, is set to the midpoint between the minimum operating temperature and the maximum operating temperature of the ash output from the leaning temperature prediction procedure. Finally, after confirming that the difference between the final operating predicted temperature of mixed ash (18) and the on-line measured gasifier operating temperature (19) converges to within a certain temperature deviation (ΔT) do.
If the difference between the final operating predicted temperature of the mixed ash (18) and the on-line measured gasifier operating temperature does not converge within a certain temperature deviation, analyze the ash case that can converge to within a certain temperature deviation. Among the analyzed cases, the most similar case is selected (21) when compared with the mixed ash composition data measured in real time, and it is determined as the updated optimal mixing ratio and additive input ratio (22). The updated optimum mix of minerals and
3 is in connection with an embodiment of the present invention, real-time batch analysis using the data, four-component system for the ash to be carried out in the process of predicting the temperature Yongyu (SiO 2 -Al 2 O 3 -FeO -CaO) solid-liquid Is a phase diagram.
The conventional method of predicting the temperature of the circulating fluid was a method of utilizing the correlation derived by analyzing the ash composition and the temperature measurement database. However, in this case, the accuracy of the prediction of the oil temperature is deteriorated with respect to the ash composition when leaving the database.
Therefore, it is necessary to classify the clusters according to the type of the crystal phase of the slag and to derive the correlation of the temperature of the clay oil for each cluster.
For this, a phase balance diagram is constructed as shown in FIG. 3, and a liquid phase temperature in which slag exists as 100% liquid is obtained.
The liquid phase temperature values of the ash composition were classified into four clusters according to the type of slag crystal phase, and the correlation was derived based on the measured values of the circulating fluid temperature in each cluster and the temperature of the fluidized oil was predicted.
The following table is a table comparing the measured fusing oil temperature with the estimated fusing oil temperature for the eight coal types to confirm the reliability of the method. As shown in the table, the error rate is 1.5% or less, which is significantly lower than the conventional error rate.
By combining real-time component analysis with real-time ash analysis technology, real-time prediction of the melt temperature is made possible.
The coal and additive supply apparatus and method of supplying the gasification plant as described above are not limited to the configuration and the method of the above-described embodiments, but the embodiments can be applied to all of the embodiments Or some of them may be selectively combined.
Claims (4)
Measuring the composition of coal or additive transferred from each conveyor in real time using a fluorescent X-ray analyzer;
The composition of the mixture is measured in real time using a fluorescent X-ray analyzer in the state of mixed coal and additives, and the minimum operating temperature and maximum operating temperature of the gasifier considering the slagging property are predicted based on the measured results step; And
Comparing the operating temperature of the actual gasifier with the predicted minimum operating temperature and the maximum operating temperature to control the amount of coal or additive transferred to each conveyor belt.
Wherein controlling the amount of coal or additive comprises:
Wherein the conveying speed of each conveyor is controlled to control the amount of coal or additive.
A fluorescent X-ray analyzer placed on each conveyor to analyze the composition of the coal or additive being conveyed; And
The minimum operating temperature and the maximum operating temperature of the gasifier are predicted based on the results of the measurement by the fluorescent X-ray analyzer and compared with the operating temperature of the actual gasifier, the amount of coal or additive supplied to the conveyor The coal and additive supply unit of the gasification plant including the control unit for determining the coal and the additive.
A mixing conveyor in which coal and additives supplied to the conveyor are mixed; And
Further comprising a fluorescent X-ray analyzer formed in the mixing conveyor to analyze the composition of the mixed coal and additive mixture.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020110147819A KR101447032B1 (en) | 2011-12-30 | 2011-12-30 | Coal and Flux Supply Apparatus of Integrated gasification combined cycle power plant, and Supply Method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| KR1020110147819A KR101447032B1 (en) | 2011-12-30 | 2011-12-30 | Coal and Flux Supply Apparatus of Integrated gasification combined cycle power plant, and Supply Method thereof |
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| KR20130078714A KR20130078714A (en) | 2013-07-10 |
| KR101447032B1 true KR101447032B1 (en) | 2014-10-07 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101816212B1 (en) | 2016-09-12 | 2018-01-08 | 두산중공업 주식회사 | Apparatus for analyzing influence of combustibles |
| KR20200002417A (en) | 2018-06-29 | 2020-01-08 | 한국생산기술연구원 | Selection method of additive to reduce ash sticking occurred when using solid fuel |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3185203B1 (en) * | 2015-12-22 | 2018-09-19 | Doosan Heavy Industries & Construction Co., Ltd. | Method for predicting slagging production position and slagging production possibility in furnace |
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| JPH10259387A (en) * | 1997-03-19 | 1998-09-29 | Hitachi Ltd | Diagnostic and operating methods for coal gasification oven |
| KR101010520B1 (en) | 2007-11-21 | 2011-01-24 | 두산중공업 주식회사 | System for controlling operation of gasification and contorl method thereof |
| KR101071453B1 (en) | 2009-11-16 | 2011-10-10 | 두산중공업 주식회사 | Automatic control system for the slagging gasifier |
| KR101123883B1 (en) | 2010-06-30 | 2012-03-23 | 한국전력공사 | Method for operating of gasifier |
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2011
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH10259387A (en) * | 1997-03-19 | 1998-09-29 | Hitachi Ltd | Diagnostic and operating methods for coal gasification oven |
| KR101010520B1 (en) | 2007-11-21 | 2011-01-24 | 두산중공업 주식회사 | System for controlling operation of gasification and contorl method thereof |
| KR101071453B1 (en) | 2009-11-16 | 2011-10-10 | 두산중공업 주식회사 | Automatic control system for the slagging gasifier |
| KR101123883B1 (en) | 2010-06-30 | 2012-03-23 | 한국전력공사 | Method for operating of gasifier |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101816212B1 (en) | 2016-09-12 | 2018-01-08 | 두산중공업 주식회사 | Apparatus for analyzing influence of combustibles |
| KR20200002417A (en) | 2018-06-29 | 2020-01-08 | 한국생산기술연구원 | Selection method of additive to reduce ash sticking occurred when using solid fuel |
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| KR20130078714A (en) | 2013-07-10 |
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