KR101764302B1 - Method and apparatus for removing tar in synthetic gas by using steel-making slag - Google Patents

Method and apparatus for removing tar in synthetic gas by using steel-making slag Download PDF

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KR101764302B1
KR101764302B1 KR1020150041211A KR20150041211A KR101764302B1 KR 101764302 B1 KR101764302 B1 KR 101764302B1 KR 1020150041211 A KR1020150041211 A KR 1020150041211A KR 20150041211 A KR20150041211 A KR 20150041211A KR 101764302 B1 KR101764302 B1 KR 101764302B1
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slag
furnace
fluidized bed
gasification furnace
bed gasification
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KR1020150041211A
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Korean (ko)
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KR20160114833A (en
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남성방
성호진
박영수
구재회
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고등기술연구원연구조합
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    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
    • C10K3/00—Modifying the chemical composition of combustible gases containing carbon monoxide to produce an improved fuel, e.g. one of different calorific value, which may be free from carbon monoxide
    • C10K3/02—Modifying the chemical composition of combustible gases containing carbon monoxide to produce an improved fuel, e.g. one of different calorific value, which may be free from carbon monoxide by catalytic treatment
    • C10K3/023—Reducing the tar content
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J21/00—Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
    • B01J21/06—Silicon, titanium, zirconium or hafnium; Oxides or hydroxides thereof
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10C—WORKING-UP PITCH, ASPHALT, BITUMEN, TAR; PYROLIGNEOUS ACID
    • C10C1/00—Working-up tar

Abstract

The present invention relates to a method and system for reforming tar using a steelmaking slag as a by-product, which is a byproduct of a steel smelting process, as a catalyst for efficiently purifying and reforming tar, and more particularly, By using the slag as a reforming catalyst for tar contained in the syngas after the pretreatment, the steel slag has excellent self-thermal durability, and continuous operation of the process is possible, and addition of a separate tar refining facility is not required It is possible to reduce the coke production gas system and the gasification process system and to reduce the operation cost of the gasification facility.

Description

[0001] METHOD AND APPARATUS FOR REMOVING TAR IN SYNTHETIC GAS BY USING STEEL-MAKING SLAG [0002]

The present invention relates to a method and a system for reforming tar contained in a syngas produced in a coke production or gasification system using a steelmaking slag, which is a byproduct generated in a steelmaking process, more specifically, The present invention relates to a tar reforming method and a system which are excellent in self-thermal durability of a steelmaking slag by using slag as a tar reforming catalyst contained in syngas, enable continuous operation of the process, and reduce the operating cost of the gasification facility.

Gasification is a process in which a gasifier such as air, oxygen, steam or carbon dioxide is added to a solid or liquid fuel, either alone or in combination with each other to react at a high temperature to obtain hydrogen, carbon monoxide and methane as main components, It says.

Gasification can be made from fuels such as coal, waste, and biomass. For example, coal is converted to syngas composed mainly of hydrogen and carbon monoxide at high temperature and high pressure, and then dust and sulfur Remove harmful substances such as compounds and refine them to a level similar to that of natural gas. The gasified gaseous fuel can be used as a source gas of, for example, an integrated gasification combined cycle (IGCC) or an integrated gasification fuel cell (IGFC).

Gasification technology began with the goal of producing convenient gas fuels or syngas at an early stage in the non-catalytic state of coal lumps. In recent years, most of them have been developed in the direction of fixed bed gasification and catalytic gasification for pulverized coal. Since then, flow catalytic gasification using fluidized bed combustion technology has appeared for the purpose of reforming heavy oil and is being promoted as a method of high temperature gasification and purification that minimizes the generation of tar with application of coal and biomass gasification.

Recently, the gasification process, which is used in the gasification process, determines the gasifier and the operating conditions according to the purpose of the reaction and the product. Depending on the gasifier, the entrained bed, the fluidized bed, and the moving fixed bed bed.

Classified bed gasification reactors are used in many coal gasification combined cycle power generation (IGCC), but they have limited fuel use and are applied to large gasification compared to other types of gasifier.

The mobile bed fixed bed gasification reactor is used for comparatively small gasification, has a low efficiency and is difficult to control contaminants such as tar.

In contrast, the fluidized bed gasifier is applicable to a wide range of fuels and various capacities, and it is easy to control tar and synthesis gas composition.

From the raw material, other than the synthesis gas and char, tar is also produced as a product through the gasification process. Tar is a macromolecular organic material having a higher molecular weight than benzene, and its product composition varies greatly depending on the type of reactor, reaction temperature, residence time, etc., and exists as a liquid material having a high viscosity when condensed at a dew point (350 ° C) or lower .

Tars cause fouling or plugging to pipe and tube at below dew point temperature, which makes continuous operation of equipment difficult and causes corrosion of pipe, so it is known as a substance that must be removed for stable continuous operation of system have.

In order to remove tar, a physical treatment method using a wet scrubber, a wet electrostatic precipitator, a barrier filter and a cyclone, a method using a catalyst and a thermal cracking Can be used.

In particular, in a fluidized bed gasifier, a method of removing tar from a catalyst includes a method of reforming tar by introducing a catalyst into a gasifier, and a method of providing a separate reforming furnace at the end of the gasifier. . Such noble metal catalysts are not only expensive but also require additional cost to replace the noble metal catalysts due to the deactivation of the catalyst due to the operation of the gasifier.

A recently known tar removal method is a steam reforming reaction using a catalyst for improving gasification efficiency and efficient tar removal. Since conventional commercial catalysts contain noble metals such as Ni series, Since the cost is considerably high, a lot of maintenance costs are required for application to a large-scale process.

In addition, most conventional catalysts for reforming serve as inhibitors of continuous operation due to sintering of catalyst and carbon deposition due to melting which may occur during high temperature operation.

On the other hand, steelmaking slag generated during the smelting process of steel mills is produced more than 8.3 million tons per year. Since steelmaking mainly contains heavy metals, steelmaking slag is required to be aged for a long time and is processed in simple landfill or large-scale yard. Steelmaking slag is not easy to use as building aggregate due to expansion phenomenon, which is a big environmental problem.

On the other hand, Korean Patent Application No. 10-2010-0136036 discloses "a method for producing an adsorbent for removing volatile organic compounds ". The above registration publication discloses a technique of using steel making slag through alkali treatment in a specific atmosphere as an adsorbent. However, in the above-mentioned registration publication, it is impossible to disclose the alkaline hydrothermal treatment method using the alkali solution and the pretreatment method using the hot water treatment method using steam in order to utilize the steel making slag as the tar reforming catalyst proposed in the present invention There is a large difference from the present invention, and the effect of the present invention is not realized.

In addition, Korean Patent Application No. 10-2006-0087836 discloses "a method and apparatus for removing mercury in incinerator flue gas using blast furnace slag." The above registration publication discloses a technique of using an alkali solution to improve the surface area of a sample. However, since the alkaline hydrothermal treatment method and the hydrothermal treatment method using the alkali solution proposed in the present invention are not disclosed at all in the above-mentioned registration publication, they are different from the present invention in point of view, and the effect of the present invention is not realized.

In addition, Korean Patent Application No. 10-2009-0133423 discloses "a method for producing a catalyst for high temperature desulfurization using steel making slag and a catalyst for desulfurization ". The above registration publication discloses a technique of using steel making slag as a carrier for a desulfurization catalyst. However, in the above registration publication, the alkali hydrothermal treatment method using an alkali solution and the hydrothermal treatment method are not disclosed at all, which is a great difference from the present invention, and the effect of the present invention is not realized.

Korean Patent Application No. 10-2010-0136036 Korean Patent Application No. 10-2006-0087836 Korean Patent Application No. 10-2009-0133423

DISCLOSURE OF THE INVENTION The present invention has been made to solve the above-mentioned problems and it is an object of the present invention to provide a method of manufacturing a steel slag, which uses a steelmaking slag which does not require a separate manufacturing process as compared with a conventional tar reforming catalyst, And it is possible to reduce the operating cost of the gasification plant because it is possible to reduce the coke production gas system and the gasification process system since it is possible to continuously operate the process and does not require the addition of a separate tar refining facility The present invention provides a tar reforming method and system.

In order to achieve the above object, the present invention provides a method for modifying tar contained in a syngas generated in a gasifier by using a slag generated during smelting as a gas reforming catalyst after a pretreatment process.

In the tar reforming method of the present invention, the slag is pretreated in order to improve the surface area of the slag, the synthesis gas is produced by the gasification reaction of the sample, and the steam contained in the pretreated slag is reformed to reform the tar contained in the synthesis gas.

The slag pretreatment method may include at least one of a slag hydrothermal treatment method using steam at a high temperature and a high pressure condition, a slag alkali treatment method using an alkali solution, and a slag alkaline hydrothermal treatment method using a hot alkaline solution .

The slag hydrothermal treatment may be carried out, for example, at a temperature of 230-260 ° C and 35-45 bar, preferably at a pressure of 35-45 bar, using a pressure vessel on a 30: 1 mass ratio of distilled water and slag, It may be maintained at a subcritical state of 250 DEG C and 40 bar for a predetermined time, for example, 5 hours.

In the slag alkaline hydrothermal treatment method, for example, the slag is crushed to a size of 1 mm or less in diameter, and is maintained in a 1 wt.% Or more NaOH aqueous solution by using a pressure vessel at 250 DEG C and 40 bar conditions for 5 hours .

Meanwhile, the present invention provides a tar reforming system using steelmaking slag.

The tar reforming system using the steelmaking slag according to the first example of the present invention includes a fixed-bed gasification furnace inside, generates a synthesis gas by a gasification reaction by supplying a sample, and slag- A double pipe reaction furnace for supplying the pretreated slag and reforming the tar contained in the synthesis gas; A sample supply unit installed on the fixed bed gasification furnace to supply a sample to the fixed bed gasification furnace; A slag supply unit installed above the slag reaction furnace to supply slag pretreated with the slag reaction furnace; An oxidant supplier installed in the fixed bed gasifier for gasification reaction; A steam supply unit installed in the slag reaction furnace for steam reforming; And a reaction gas discharge portion for discharging the reformed gas to the outside of the slag reaction furnace.

The steam supply part promotes upward flow of the reformed gas and the high heat and prevents poisoning of the catalyst by carbon deposition of the slag.

In the tar reforming system using the steelmaking slag according to the second embodiment of the present invention, a sample is supplied to the inside of the steelmaking slag to produce synthesis gas by gasification reaction, and the slag pretreated as a catalyst is supplied to reform tar Fixed bed gasification furnace; A sample slag supply unit installed above the fixed bed gasification furnace to supply the sample and the slag to the fixed bed gasification furnace; An oxidant supplier installed in the fixed bed gasifier for gasification reaction; A steam supply unit installed in the fixed bed gasification furnace for steam reforming; And a reactive gas discharge portion for discharging the reformed gas to the outside of the fixed bed gasification furnace.

Further, the tar reforming system using the steelmaking slag according to the third embodiment of the present invention includes a fixed bed gasification furnace for supplying a sample and generating a syngas by a gasification reaction; A sample supply unit installed above the fixed bed gasification furnace to supply the sample to the fixed bed gasification furnace; A tar reforming furnace connected to (communicated with) the fixed bed gasification furnace to reform the tar contained in the syngas produced in the fixed bed gasification furnace by receiving slag pretreated as a catalyst; A slag supply unit installed above the tar reforming furnace to supply slag pretreated to the tar reforming furnace; An oxidant supplier installed in the fixed bed gasifier for gasification reaction; A steam supply unit installed in the tar reforming furnace for steam reforming; And a reactive gas discharge portion for discharging the reformed gas to the outside of the tar reforming furnace.

The tar reforming system using the steelmaking slag according to the fourth example of the present invention includes a fixed bed gasification furnace, and a sample and slag are supplied to produce a syngas by a gasification reaction, and the outside of the fixed bed gasification furnace A dual pipe reaction furnace having a slag reaction furnace enclosing the slag reactor and supplying slag pretreated as a catalyst to reform the tar contained in the syngas produced in the fixed bed gasification furnace; A sample slag supply unit installed on the fixed bed gasification furnace so as to supply slag pretreated with the sample to the fixed bed gasification furnace; A slag supply unit installed above the slag reaction furnace to supply the slag pretreated with the slag reaction furnace; An oxidant supplier installed in the fixed bed gasifier for gasification reaction; A first steam supply unit installed in the slag reaction furnace for steam reforming; A second steam supply unit installed in the fixed bed gasification furnace for steam reforming; And a reaction gas discharge portion for discharging the reformed gas to the outside of the slag reaction furnace.

In addition, the tar reforming system using the steelmaking slag according to the fifth embodiment of the present invention generates a synthesis gas by a gasification reaction by supplying a sample to the inside of the steelmaking slag, and the slag pretreated as a catalyst is supplied to reform tar Fluidized bed gasification furnace; A sample supply unit installed above the fluidized bed gasification furnace to supply a sample to the fluidized bed gasification furnace; A slag supply unit installed below the fluidized bed gasification furnace to supply slag pretreated to the fluidized bed gasification furnace; A fluidized bed jetting plate installed at a lower portion of the fluidized bed gasification furnace to filter the remaining bottoms after gasification; An oxidant supply unit installed below the fluidized bed ejection plate for gasification reaction; A steam supply unit installed below the fluidized bed ejection plate for steam reforming; And a reactive gas discharge unit for discharging the reformed gas to the outside of the fluidized bed gasification furnace.

In addition, the tar reforming system using the steelmaking slag according to the sixth example of the present invention includes a fluidized bed gasification furnace for supplying a sample and generating a syngas by a gasification reaction; A sample supply unit installed above the fluidized bed gasification furnace to supply a sample to the fluidized bed gasification furnace; A fluidized bed medium supply unit for supplying the fluidized bed medium into the fluidized bed gasification furnace; A tar reforming line communicating with the fluidized bed gasification furnace to reform tar contained in the syngas produced in the fluidized bed gasification furnace using slag pretreated as a catalyst; A slag supply unit installed above the tar reforming furnace to supply slag pretreated to the tar reforming furnace; A fluidized bed jetting plate installed in the fluidized bed gasification furnace for filtering the remaining bottoms after gasification; An oxidant supply unit installed below the fluidized bed ejection plate for gasification reaction; A steam supply unit installed in the tar reforming furnace for steam reforming; And a reactive gas discharge portion for discharging the reformed gas to the outside of the tar reforming furnace.

Also, the tar reforming system using the steelmaking slag according to the seventh example of the present invention includes a fluidized bed gasification furnace for supplying a sample and producing a syngas by a gasification reaction; A sample supply unit installed above the fluidized bed gasification furnace to supply a sample to the fluidized bed gasification furnace; A slag primary supply unit installed below the fluidized-bed gasification furnace to supply slag pretreated to the fluidized bed gasification furnace; A tar reforming line communicating with the fluidized bed gasification furnace to reform tar contained in the syngas produced in the fluidized bed gasification furnace using slag pretreated as a catalyst; A slag secondary supply unit installed above the tar reforming furnace to supply slag pretreated with the tar reforming furnace; A fluidized bed jetting plate installed at a lower portion of the fluidized bed gasification furnace to filter the remaining bottoms after gasification; An oxidant supply unit installed below the fluidized bed ejection plate for gasification reaction; A first steam supply unit installed in the fluidized bed gasification furnace for steam reforming; A second steam supply unit installed in the tar reforming furnace for steam reforming; And a reactive gas discharge portion for discharging the reformed gas to the outside of the tar reforming furnace.

In the tar reforming system using the steelmaking slag according to the eighth example of the present invention, a sample is supplied to the inside of the steelmaking slag to produce synthesis gas by gasification reaction, and the slag pretreated as a catalyst is supplied to reform tar Fluidized bed gasification furnace; A sample supply unit installed above the fluidized bed gasification furnace to supply a sample to the fluidized bed gasification furnace; A slag supply unit installed below the fluidized bed gasification furnace to supply slag pretreated to the fluidized bed gasification furnace; A cyclone for receiving the synthesis gas produced in the fluidized bed gasification furnace and separating the slag contained in the synthesis gas; A downcomer installed at a lower portion of the cyclone for moving the slag separated by the cyclone to a lower portion of the fluidized bed gasification furnace; A fluidized bed jetting plate installed at a lower portion of the fluidized bed gasification furnace to filter the remaining bottoms after gasification; An oxidant supply unit installed below the fluidized bed ejection plate for gasification reaction; A steam supply unit installed below the fluidized bed ejection plate for steam reforming; And a reactive gas discharge unit for discharging the reformed gas passed through the cyclone to the outside.

In the tar reforming system using the steelmaking slag according to the ninth example of the present invention, a sample is supplied to the inside of the steelmaking slag to produce synthesis gas by gasification reaction, and the slag pretreated as a catalyst is supplied to reform tar Fluidized bed gasification furnace; A sample supply unit installed above the fluidized bed gasification furnace to supply a sample to the fluidized bed gasification furnace; A slag supply unit installed below the fluidized bed gasification furnace to supply slag pretreated to the fluidized bed gasification furnace;

A first cyclone for receiving the synthesis gas produced in the fluidized bed gasification furnace and separating the slag contained in the synthesis gas; A downfalling pipe installed at a lower portion of the first cyclone to move the slag to a lower portion of the fluidized bed gasification furnace; A circulation slag supply unit connected to the downcomer to circulate and supply the slag moved to the downcomer; A reaction gas discharge pipe connected to the downfalling pipe to discharge the reformed gas; A second cyclone that receives the reformed gas discharged to the reaction gas discharge pipe and separates the dust contained in the reformed gas again; A fluidized bed jetting plate installed at a lower portion of the fluidized bed gasification furnace to filter the remaining bottoms after gasification; An oxidant supply unit installed below the fluidized bed ejection plate for gasification reaction; A steam supply unit installed below the fluidized bed ejection plate for steam reforming; And a reactive gas discharge unit for discharging the reformed gas passed through the second cyclone to the outside.

As described above, according to the present invention, the steelmaking slag, which is produced at 1,200 ° C., can be used as a tar reforming catalyst after pretreatment of steelmaking slag which does not require a separate manufacturing process as compared with existing commercial reforming tar- (Fe 2 O 3 ), which is the main component, is excellent in durability due to sintering and carbon deposition, enabling continuous operation of the process.

Further, by directly inputting the steelmaking slag into the gasification furnace, it is possible to reduce the coke production gas system and the gasification process system, and it is possible to reduce the operating cost of the gasification facility, since no additional tar refining facility is required.

In addition, steel slag can be continuously supplied at a low cost, so that it can be easily applied to various gasification furnaces and reforming reactors.

In addition, the process is simpler than that of the conventional pretreatment method, and it is easy to utilize the catalyst of the steelmaking slag mass-produced through a quick pretreatment process.

In addition, unlike steel slag that is used in steel mills, coal slag is mainly used as aggregate or landfill, which can be used as a high value added resource through catalyst utilization.

In addition to the tar reforming catalyst, pretreated steelmaking slag can also be used as an adsorbent for removing VOCs in the workplace and as a catalyst for removing organic matters contained in a large amount of wastewater.

Steelmaking slag used as a catalyst can also sell iron oxide recovered through charcoal separation as a valuable material.

1 is a graph showing the steam reforming performance evaluation of the present invention
2 is a view showing a tar reforming system using steelmaking slag according to the first embodiment of the present invention
3 is a view showing a tar reforming system using steel making slag according to a second embodiment of the present invention
4 is a view showing a tar reforming system using steelmaking slag according to a third embodiment of the present invention
5 is a view showing a tar reforming system using steelmaking slag according to a fourth embodiment of the present invention
6 is a view showing a tar reforming system using steel making slag according to a fifth embodiment of the present invention
7 is a view showing a tar reforming system using steelmaking slag according to a sixth embodiment of the present invention
FIG. 8 is a view showing a tar reforming system using steelmaking slag according to a seventh embodiment of the present invention
9 is a view showing a tar reforming system using steelmaking slag according to an eighth embodiment of the present invention
10 is a view showing a tar reforming system using steel making slag according to a ninth embodiment of the present invention

Hereinafter, a tar reforming method and a tar reforming system using steelmaking slag according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

The present invention provides a method for reforming tar contained in a syngas produced in a gasifier by using slag generated during smelting as a catalyst after pretreatment.

The tar reforming method of the present invention performs a process of pretreating slag in order to improve the surface area of the slag.

Then, a sample is supplied to a gasifier to perform a gasification reaction to produce a synthesis gas, and slag pretreated as a catalyst is used to remove tar contained in the synthesis gas produced by the gasification reaction, The tar contained in the gas is reformed.

Here, the sample includes both municipal wastes and industrial wastes, and can be produced in the form of pellets.

The slag pretreatment step may include at least one of a slag hydrothermal treatment process using steam at a high temperature and a high pressure condition, a slag alkali treatment process using an alkali solution, and a slag alkali hydrothermal treatment process using a hot alkali solution .

In the slag hydrothermal treatment method, the slag is pulverized to a size of 1 mm or less in diameter, and then is pulverized in a subcritical state of 250 ° C and 40 bar for a predetermined time, for example, 5 minutes using distilled water and slag at a mass ratio of 30: It can be maintained for a period of time.

In the slag alkaline hydrothermal treatment, the slag may be crushed to a size of 1 mm or less in diameter and maintained in a 1 wt.% Or more NaOH aqueous solution using a pressure vessel at 250 ° C. and 40 bar for 5 hours.

Since the steelmaking slag produced as a by-product in a steel mill is formed at a high temperature, the sintering phenomenon that may occur during the catalytic reaction does not occur, so that the catalytic activity is continuously maintained.

Refining facilities for treating tar generated from waste, biomass syngas, and coke oven gas can be scaled down through the construction of tar reforming using steelmaking slag.

≪ Evaluation of steam reforming performance >

In order to evaluate the tar reforming performance using the steel slag of the present invention, steam reforming performance was evaluated using steam, which is a typical component of tar, in a steam reforming reactor.

The reactor was charged with 0.3 g of steelmaking slag, the reactants were fed under a 2: 1 carbon-to-carbon ratio of steam to benzene, and nitrogen was supplied to maintain the residence time at 0.3 seconds.

In order to apply the slag pretreatment method of the present invention, examples of the components include 22.1 wt% of SiO 2 , 7.6 wt% of Al 2 O 3 , 0.6 wt% of TiO 2 , 3.9% of P 2 O 5 , 22.8 wt% of Fe 2 O 3 , 32.2 wt% of CaO, 7.3 wt% of MgO, and 0.6 wt% of Na 2 O were applied to the examples of the present invention.

FIG. 1 is a graph showing an evaluation of steam reforming performance of the present invention, and a comparative example shows a pretreatment method using a conventional iron oxide-based commercial catalyst. Example 1 shows a hydrothermal treatment method in which steam is used for pretreatment. Example 2 shows an alkali treatment method for pretreating with an alkaline aqueous solution, and Example 3 shows an alkaline hydrothermal treatment method for performing a pretreatment using an alkaline aqueous solution of warming.

The carbon conversion rate, that is, the activity, according to each reaction temperature (800 °, 850 °, 900 °) was 21%, 27%, 40% 45% and 82%, respectively, and Example 2 of the present invention was 30%, 35% and 53%, and Example 3 of the present invention was 11.6%, 25% and 53.4%, respectively.

In the hydrothermal treatment of the slag pretreatment method proposed in the present invention, the carbon conversion rate at the reaction temperature condition was about 42% higher than that of the conventional iron oxide based commercial catalyst pretreatment method.

Therefore, among the methods of pretreating the slag for tar removal, it was confirmed that the efficiency of the hydrothermal treatment method was the highest, followed by the alkali treatment method and the alkaline hydrothermal treatment method.

Both the hydrothermal treatment method, the alkali treatment method and the alkaline hydrothermal treatment method proposed in the present invention can be confirmed to be improved as compared with the pretreatment method using the conventional iron oxide based commercial catalyst.

Meanwhile, the present invention provides a tar reforming system using steelmaking slag through the above-mentioned pretreatment method.

Hereinafter, a tar reforming system using steel making slag according to the first to ninth embodiments of the present invention will be described with reference to FIGS. 2 to 11. FIG.

FIG. 2 is a view showing a tar reforming system using steelmaking slag according to the first embodiment of the present invention.

As shown in FIG. 2, the tar reforming system using steelmaking slag according to the first embodiment of the present invention includes a fixed bed gasification furnace 111, a sample is supplied, a synthesis gas is produced by a gasification reaction, And a slag reaction path 112 surrounding the outside of the fixed bed gasification furnace 111. A dual pipe reaction furnace 110 is provided for reforming the tar contained in the synthesis gas by receiving the slag.

A sample supply unit S 1 is installed above the fixed bed gasification furnace 111 to supply a sample to the fixed bed gasification furnace 111.

A slag supply unit (S 2) is installed above the slag reaction furnace (112) to supply the slag pretreated to the slag reaction furnace (112).

For the gasification reaction, the fixed bed gasification furnace 111 is provided with an oxidant supply unit 120.

The steam supply unit 130 is installed in the slag reaction furnace 112 for steam reforming.

The steam supply part 130 promotes upward flow of the reformed gas and high heat and prevents poisoning of the catalyst due to carbon deposition of the slag.

A reaction gas discharge part 140 is installed on the upper part of the slag reaction path 112 to discharge the reformed gas to the outside of the dual pipe reaction furnace 110.

A bottom material discharging portion 111a for discharging the remaining flooring after gasification is provided in the lower portion of the fixed bed gasification furnace 111 and a slag discharging portion 112a for discharging the slag is installed in the lower portion of the slag reaction path 112 do.

In the tar reforming system using the steelmaking slag according to the first embodiment of the present invention shown in FIG. 2, a sample supplied into the fixed bed gasification furnace 111 through the sample supply unit S 1 is supplied from the oxidant supply unit 120 Combustion and gasification reactions occur with the oxidizer and produce syngas. The syngas moves downward and flows into the slag reaction furnace 112. At this time, the synthesis gas may contain tar, which is a form in which the sample is not completely decomposed. Therefore, slag pretreated as a catalyst acts to modify the gas. The steam supply unit 130 is configured to supply the reformed gas and the high- Promoting the inflow and preventing catalyst poisoning by carbon deposition of slag. The reformed gas is supplied to the outside through the reaction gas discharge unit 140.

In the tar reforming system using the steelmaking slag according to the first embodiment of the present invention shown in FIG. 2, since the double-bed structure having the fixed-bed gasification furnace 111 inside and the slag reaction path 112 outside is used, A gas reforming process can be performed.

3 is a view showing a tar reforming system using steelmaking slag according to a second embodiment of the present invention.

As shown in FIG. 3, the tar reforming system using the steelmaking slag according to the second example of the present invention receives a sample to generate a synthesis gas by a gasification reaction, receives slag pretreated as a catalyst, And a fixed-bed gasification furnace 210 for reforming the contained tar.

A sample slag supply unit (S 1) is installed above the fixed bed gasification furnace (210) to supply the slag pretreated with the sample to the fixed bed gasification furnace (210).

An oxidant supply unit 220 is installed below the fixed bed gasification furnace 210 for the gasification reaction.

A steam supply unit 230 is installed below the fixed bed gasification furnace 210 for steam reforming.

The reaction gas discharge unit 240 is installed above the fixed bed gasification furnace 210 to discharge the reformed gas to the outside of the fixed bed gasification furnace 210.

In addition, a bottom material discharging part 210a for discharging the remaining flooring material and slag after gasification may be installed in the lower part of the fixed bed gasification furnace 210.

In the tar reforming system using the steelmaking slag according to the second embodiment of the present invention shown in FIG. 3, the sample supplied into the fixed bed gasification furnace 210 through the sample slag supply unit S 1 is supplied from the oxidizer supply unit 220 And combustion and gasification reactions are performed to produce synthesis gas. Also, the slag pretreated as a catalyst acts to reform the gas. The steam supply part 230 promotes upward flow of the reformed gas and the high heat, and prevents poisoning of the catalyst due to carbon deposition of the slag. The reformed gas is supplied to the outside through the reaction gas discharge unit 240.

4 is a view showing a tar reforming system using steelmaking slag according to a third embodiment of the present invention.

As shown in FIG. 4, the tar reforming system using the steelmaking slag according to the third example of the present invention includes a fixed bed gasification furnace 311 which receives a sample and generates a syngas by a gasification reaction.

In order to supply the sample to the fixed bed gasifier 311, a sample feeder S 1 is installed above the fixed bed gasifier 311.

A tar reforming furnace 312 is installed at a position connected to the fixed bed gasification furnace 311 in order to reform the tar contained in the syngas of the fixed bed gasification furnace 311 by supplying the slag pretreated with the catalyst .

A slag supply unit (S 2) is installed on the tar reforming furnace (312) to supply slag to the tar reforming furnace (312).

For the gasification reaction, an oxidant supply unit 320 is installed in the fixed bed gasification furnace 311.

The steam reformer (312) is provided with a steam supply unit (330) for steam reforming.

A reaction gas discharge unit 340 is installed below the tar reforming furnace 312 to discharge the reforming gas to the outside of the tar reforming furnace 312.

A bottom material discharging portion 311a for discharging the bottom material left after gasification is provided in the lower portion of the fixed bed gasification furnace 311 and a slag discharging portion 312a for discharging the slag is provided in the lower portion of the tar reforming furnace 312 Respectively.

In the tar reforming system using the steelmaking slag according to the third embodiment of the present invention shown in FIG. 4, a sample supplied into the fixed bed gasification furnace 111 through the sample supply unit S 1 is supplied from the oxidant supply unit 320 Combustion and gasification reactions occur with the oxidizer and produce syngas. The syngas moves upward and flows into the tar reforming furnace 312.

At this time, the syngas may include tar, which is a form in which the sample is not completely decomposed. Therefore, the slag pretreated as a catalyst acts to reform the gas. The steam supply unit 330 is disposed above the reformed gas and the high- Promoting the inflow and preventing catalyst poisoning by carbon deposition of slag. The reformed gas is supplied to the outside through the reaction gas outlet 340.

5 is a view showing a tar reforming system using steelmaking slag according to a fourth embodiment of the present invention.

As shown in FIG. 5, the tar reforming system using the steelmaking slag according to the fourth example of the present invention includes a fixed bed gasification furnace 411 therein, receives a sample and slag, generates a syngas by a gasification reaction, And a slag reaction path 412 surrounding the outside of the fixed bed gasification furnace 411. The slag reaction furnace 411 is provided with a slag reactor 412 for reforming the tar contained in the synthesis gas generated by the fixed bed gasification furnace 411, Tube reaction furnace 410.

A sample slag supply unit S 1 is installed in the upper part of the fixed bed gasification furnace 411 to supply slag pretreated with the sample to the fixed bed gasification furnace 411.

A slag supplying unit S 2 is provided above the slag reaction furnace 412 to supply slag pretreated to the slag reaction furnace 412.

For the gasification reaction, the fixed bed gasification furnace 411 is provided with an oxidizing agent supply unit 420.

A first steam supply unit 430 is installed in the slag reaction furnace 412 and a second steam supply unit 431 is installed in the fixed bed gasification furnace 411 for steam reforming for steam reforming.

The reaction gas discharge unit 440 is installed at the upper part of the slag reaction path 412 to discharge the reformed gas to the outside of the slag reaction path 412.

A bottom portion discharging portion 411a for discharging the remaining flooring material and slag after the gasification is provided in the lower portion of the fixed bed gasification furnace 411 and a slag discharging portion 412a for discharging the slag is provided in the lower portion of the slag reaction path 412 Is installed.

In the tar reforming system using the steelmaking slag according to the fourth embodiment of the present invention shown in FIG. 5, the sample supplied into the fixed bed gasification furnace 411 through the sample supply unit S 1 is supplied from the oxidant supply unit 420 Combustion and gasification reactions occur with the oxidizer and produce syngas. The syngas moves upward and flows into the slag reaction furnace 412. At this time, the syngas may include tar, which is a form in which the sample is not completely decomposed. Therefore, the slag pretreated as a catalyst acts to modify the gas. The first and second steam supplying units 430 and 431, Promotes upward flow of the reformed gas and high heat, and serves to prevent catalyst poisoning by carbon deposition of slag. The reformed gas is supplied to the outside through the reaction gas discharge portion 440.

In the tar reforming system using the steelmaking slag according to the fourth embodiment of the present invention shown in FIG. 5, since the fixed bed gasification furnace 411 is provided therein and the slag reaction furnace 412 is provided outside, Can be performed.

6 is a view showing a tar reforming system using steelmaking slag according to a fifth embodiment of the present invention.

As shown in FIG. 6, the tar reforming system using the steelmaking slag according to the fifth example of the present invention supplies a sample to a synthesis gas by a gasification reaction, receives slag pretreated as a catalyst, And a fluidized-bed gasification furnace 510 for reforming the included tar.

A sample supply unit S 1 is installed above the fluidized-bed gasification furnace 510 to supply the sample to the fluidized-bed gasification furnace 510.

A slag feeder (S 2) is installed below the fluidized-bed gasification furnace (510) to feed the slag pretreated to the fluidized bed gasification furnace (510) to the catalyst and the fluidized bed.

In order to filter the remaining bottoms after the gasification, a fluidized bed spraying plate P is installed below the fluidized bed gasification furnace 510.

For the gasification reaction, an oxidant supply unit 520 is installed below the fluidized-bed spray plate P.

A steam supply unit 530 is installed under the fluidized bed spray plate P for steam reforming.

A reactive gas discharge unit 540 is installed above the fluidized bed gasification furnace 510 to discharge the reformed gas to the outside of the fluidized bed gasification furnace 510.

In addition, a bottom material discharging portion 510a for discharging the bottom material and the slag remaining after gasification is installed in the lower portion of the fluidized bed gasification furnace 510.

In the tar reforming system using the steelmaking slag according to the fifth embodiment of the present invention shown in FIG. 6, the sample supplied into the fluidized bed gasification furnace 510 through the sample supply unit S 1 meets the oxidizing agent, To produce syngas.

Also, the slag pretreated as a catalyst acts to reform the gas. The steam supply unit 530 promotes upward flow of the reformed gas and the high heat, and prevents poisoning of the catalyst due to carbon deposition of the slag. The reformed gas is supplied to the outside through the reaction gas outlet 540.

FIG. 7 is a view showing a tar reforming system using steelmaking slag according to the sixth embodiment of the present invention.

As shown in FIG. 7, the tar reforming system using the steelmaking slag according to the sixth embodiment of the present invention includes a fluidized bed gasification furnace 611 that receives a sample and generates a syngas by a gasification reaction.

A sample supply unit S 1 is installed above the fluidized-bed gasification furnace 611 to supply the sample to the fluidized bed gasification furnace 611.

A fluidized bed medium supply unit (S 2) is installed below the fluidized bed gasification furnace (611) to supply the fluidized bed medium into the fluidized bed gasification furnace (611).

A tar reforming furnace 612 is installed at a position communicating with the fluidized bed gasification furnace 611 to modify the tar contained in the syngas produced in the fluidized bed gasification furnace 611 by using the slag pretreated as a catalyst.

A slag supplying unit S 3 is installed above the tar reforming furnace 612 to supply the slag pretreated to the tar reforming furnace 612.

In order to filter the remaining bottoms after the gasification, a fluidized bed jetting plate P is installed below the fluidized bed gasification furnace 611.

For the gasification reaction, an oxidant supply unit 620 is installed below the fluidized bed spray plate P.

A steam supply unit 630 is installed in the tar reforming furnace 612 for steam reforming.

The reaction gas discharge unit 640 may be installed below the tar reforming furnace 612 to discharge the reforming gas to the outside of the tar reforming furnace 612.

The bottom of the fluidized bed gasification furnace 611 is provided with a bottom material discharging portion 611a for discharging the remaining flooring material after the gasification and a slag discharging portion 611b for discharging the remaining slag after the reforming reaction is provided in the lower portion of the tar reforming furnace 612. [ (612a).

In the tar reforming system using the steelmaking slag according to the sixth embodiment of the present invention shown in FIG. 7, a sample supplied into the fluidized bed gasification furnace 611 through the sample supply unit S 1 is supplied from the oxidant supply unit 620 Oxidizing agent and fluid medium to produce a synthesis gas by combustion and gasification reaction.

The syngas is transferred to the tar reforming furnace 612. At this time, the syngas may include tar, which is a type in which the sample is not completely decomposed. Therefore, the slag pretreated as a catalyst acts to reform the gas. The steam supply unit 630 supplies the reformed gas and the high- And serves to prevent catalyst poisoning by carbon deposition of slag. The reformed gas is supplied to the outside through the reaction gas discharge portion 640.

FIG. 8 is a view showing a tar reforming system using steelmaking slag according to a seventh embodiment of the present invention.

As shown in FIG. 8, the tar reforming system using the steelmaking slag according to the seventh example of the present invention includes a fluidized bed gasification furnace 711 that receives a sample and generates a syngas by a gasification reaction.

A sample supply unit S 1 is installed above the fluidized-bed gasification furnace 711 to supply the sample to the fluidized bed gasification furnace 711.

A slag primary feeder (B 2) is installed below the fluidized-bed gasification furnace (711) to feed the slag pretreated to the fluidized-bed gasification furnace (711) to the catalyst and the fluidized bed.

A tar reforming furnace 712 is installed at a position communicating with the fluidized bed gasification furnace 711 in order to modify the tar contained in the synthesis gas generated in the fluidized bed gasification furnace 711 using slag pretreated as a catalyst.

The slag secondary supply unit B 3 is installed above the tar reforming furnace 712 to supply the slag pretreated to the tar reforming furnace 712.

In order to filter the remaining bottoms after the gasification, a fluidized bed jetting plate P is installed below the fluidized bed gasification furnace 711.

For the gasification reaction, an oxidant supply part 720 is installed below the fluidized bed injection plate P.

A first steam supply unit 730 is installed in the fluidized bed gasification furnace 711 for steam reforming.

A second steam supply unit 731 is installed in the tar reforming furnace 712 for steam reforming.

A reactive gas discharge unit 740 is installed below the tar reforming furnace 712 to discharge the reformed gas to the outside of the fluidized bed gasification furnace 711.

A bottom material discharge portion 711a for discharging the remaining flooring material after the gasification is provided in the lower portion of the fluidized bed gasification furnace 711 and a slag discharge portion 711b for discharging the remaining slag after the reforming reaction 712a.

In the tar reforming system using the steelmaking slag according to the seventh embodiment of the present invention shown in FIG. 8, the sample supplied into the fluidized bed gasification furnace 711 through the sample supply unit S 1 and the pretreated slag meet with the oxidizing agent, And a gasification reaction to produce a synthesis gas. The syngas is transferred to the tar reforming furnace 712. At this time, the syngas may include tar, which is a form in which the sample is not completely decomposed. Therefore, the slag pretreated as a catalyst acts to modify the gas. The first and second steam supplying units 730 and 731 Promotes upward flow of reformed gas and high heat, and prevents catalyst poisoning by carbon deposition of slag. The reformed gas is supplied to the outside through the reaction gas discharge portion 740.

9 is a view showing a tar reforming system using steelmaking slag according to an eighth embodiment of the present invention.

As shown in FIG. 9, the tar reforming system using the steelmaking slag according to the eighth example of the present invention is a system in which a sample is supplied to the inside of a steelmaking slag to produce a synthesis gas by a gasification reaction, And a fluidized-bed gasification furnace 810 for reforming the tar contained in the gasification furnace.

A sample supply unit (S 1) is installed above the fluidized bed gasification furnace (810) to supply the sample to the fluidized bed gasification furnace (810).

A slag supplying portion C 2 is installed below the fluidized-bed gasification furnace 810 to supply the slag pretreated to the fluidized bed gasification furnace 810 to the catalyst and the fluidized bed.

A cyclone 850 is installed in a position to communicate with the fluidized-bed gasification furnace 810 in order to separate the slag contained in the syngas supplied from the syngas produced in the fluidized bed gasification furnace 810.

A downfalling pipe 860 for moving the slag separated by the cyclone 850 to the lower portion of the fluidized-bed gasification furnace 810 is installed in the lower portion of the cyclone 850.

A fluidized bed jetting plate 870 is installed below the fluidized bed gasification furnace 810 to filter the remaining bottoms after being gasified and stacked on the inner bottom of the fluidized bed gasification furnace 810.

For the gasification reaction, an oxidant supply unit 820 is installed below the fluidized bed injection plate 870.

A steam supply unit 830 is installed under the fluidized bed injection plate 870 for steam reforming.

A reactive gas discharge unit 840 is connected to the cyclone 850 to discharge the reformed gas passed through the cyclone 850 to the outside.

A bottom material discharging portion 810a for discharging the remaining bottom material after gasification is installed in the lower portion of the fluidized bed gasification furnace 810.

In the tar reforming system using the steelmaking slag according to the eighth embodiment of the present invention shown in FIG. 9, the sample supplied into the fluidized-bed gasification furnace 810 through the sample supply unit S 1 and the pretreated slag meet with the oxidizer, And a gasification reaction to produce a synthesis gas. Slag pretreated as a catalyst acts to reform the gas. The syngas produced in the fluidized bed gasification furnace 810 is circulated to the cyclone 850. At this time, the slag included in the syngas is separated by the cyclone 850, then is transferred to the downfalling pipe 860, and then flows into the lower portion of the fluidized-bed gasification furnace 810. The steam supply unit 830 promotes upward flow of the reformed gas and the high heat and prevents poisoning of the catalyst due to carbon deposition of the slag. The reformed gas is supplied to the outside through the reaction gas outlet 840.

10 is a view showing a tar reforming system using steelmaking slag according to a ninth embodiment of the present invention.

10, in the tar reforming system using the steelmaking slag according to the ninth example of the present invention, a sample is supplied to the inside of the steelmaking slag, and a synthesis gas is produced by a gasification reaction. The slag pretreated as a catalyst is supplied, And a fluidized-bed gasification furnace 910 for reforming the tar contained in the gasification furnace.

A sample supply unit (S 1) is installed above the fluidized bed gasification furnace (910) to supply the sample to the fluidized bed gasification furnace (910).

A slag supply part D 2 is installed below the fluidized-bed gasification furnace 910 to supply the slag pretreated to the fluidized bed gasification furnace 910 to the catalyst and the fluidized bed.

A first cyclone 950 is installed at a position connected to the fluidized-bed gasification furnace 910 to separate the slag contained in the syngas supplied from the syngas produced in the fluidized-bed gasification furnace 910.

A downfalling pipe 960 for moving the slag to the lower part of the fluidized-bed gasification furnace 910 is installed in the lower part of the first cyclone 950. The downfalling pipe 960 is provided with a circulation slag supply unit 961 for circulating and supplying the separated slag.

A reaction gas discharge pipe 980 is connected to the downfalling pipe 960 to discharge the reformed gas.

The second cyclone 990 is installed at a position connected to the downfalling pipe 960 to receive the reformed gas discharged to the reaction gas discharge pipe 980 and to separate the dust contained in the reformed gas again.

In the lower part of the fluidized bed gasification furnace 910, a fluidized bed jetting plate 970 is installed to filter the remaining bottoms after the gasification reaction.

For the gasification reaction, an oxidant supply unit 920 is installed below the fluidized bed injection plate 970.

A steam supply unit 930 is installed under the fluidized bed injection plate 970 for steam reforming.

A reactive gas discharge port 940 is provided at a position connected to the second cyclone 990 for discharging the reformed gas passing through the second cyclone 990 to the outside, A sedimentation tank T for storing the sedimentation tank T is installed.

The bottom of the fluidized-bed gasification furnace 910 is provided with a bottom material discharge portion 910a for discharging the remaining bottom material after gasification.

In the tar reforming system using the steelmaking slag according to the ninth embodiment of the present invention shown in FIG. 10, a sample supplied into the fluidized-bed gasification furnace 910 through the sample feeder S 1 and the slag feeder D 2 The slag of the supplied pretreatment meets with the oxidizing agent and combusts and gasifies to produce syngas. Slag pretreated as a catalyst acts to reform the gas. The syngas produced in the fluidized-bed gasification furnace 910 is circulated to the first cyclone 950. At this time, the slag included in the syngas is separated by the first cyclone 950 and then moved to the downfalling pipe 960, and then circulated by the circulation slag supply unit 961. The steam supply unit 930 promotes upward flow of the reformed gas and the high heat and prevents poisoning of the catalyst due to carbon deposition of the slag.

The reformed gas moves along the reaction gas discharge pipe 980 and the second cyclone 990 receives the reformed gas discharged to the reaction gas discharge pipe 980 and separates the dust contained in the reformed gas again , And the reformed gas is supplied to the outside through the reaction gas discharge portion 940.

As described above, according to the present invention, the steelmaking slag, which does not require a separate manufacturing process as compared with the commercial catalyst for reforming tar, is pretreated and used as a catalyst to reduce the operation cost of the gasification facility, The slag has excellent thermal durability, and the iron oxide (Fe 2 O 3 ) component, which is the main component, has excellent durability due to sintering and carbon deposition, enabling continuous operation of the process.

Further, by directly injecting the steelmaking slag into the gasification furnace, it is possible to reduce the coke production gas system and the gasification process system, since no additional tar refining facility is required.

In addition, steel slag can be continuously supplied at a low cost, so that it can be easily applied to various gasification furnaces and reforming reactors.

In addition, the process is simpler than that of the conventional pretreatment method, and it is easy to utilize the catalyst of the steelmaking slag mass-produced through a quick pretreatment process.

In addition, unlike steel slag that is used in steel mills, coal slag is mainly used as aggregate or landfill, which can be used as a high value added resource through catalyst utilization.

In addition to the tar reforming catalyst, pretreated steelmaking slag can also be used as an adsorbent for removing VOCs in the workplace and as a catalyst for removing organic matters contained in a large amount of wastewater.

Steelmaking slag used as a catalyst can also sell iron oxide recovered through charcoal separation as a valuable material.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, Various modifications and variations are possible within the scope of the present invention.

110: double pipe reaction furnace
111: fixed bed gasifier
111a:
112: slag reaction furnace
112a: Slag discharge portion
120: oxidant supplier
130: Steam supply
140: reaction gas outlet
210: fixed bed gasifier
210a:
220: oxidant supplier
230: Steam supply
240: reaction gas outlet
311: Fixed-bed gasification furnace
311a:
312: tar reforming furnace
312a: slag discharge portion
320: oxidant supplier
330: Steam supply
340: reaction gas outlet
410: double tube reactor
411: Fixed-bed gasification furnace
411a:
412: slag reaction furnace
412a: Slag discharge section
420: oxidant supplier
430: first steam supply part
431: the second steam supply
440: reaction gas outlet
510: fluidized bed gasification furnace
510a:
530: Steam supply
520: oxidant supplier
530: Steam supply
540: reaction gas outlet
611: Fluidized bed gasification furnace
611a:
612: tar reforming furnace
620: oxidant supplier
630: Steam supply
640: reaction gas outlet
711: Fluidized bed gasification furnace
712: tar reforming furnace
712a: Slag discharge section
720: oxidant supplier
730: First steam supply part
731: the second steam supply section
740: reaction gas outlet
810: Fluidized bed gasification furnace
820: oxidant supplier
830: Steam supply
840: reaction gas outlet
850: Cyclone
860: Downward pipe
870: Fluidized bed spray plate
910: Fluidized bed gasification furnace
910a:
920: oxidant supplier
930: Steam supply
940: reaction gas outlet
950: first cyclone
960: Downward pipe
961: Circulating slag supply
970: Fluidized bed spray plate
980: Exhaust pipe
990: Second cyclone
P: Fluidized bed spray plate
T: Precipitation tank

Claims (17)

As a method for modifying the tar contained in the synthesis gas generated in the gasifier by using the slag generated in the smelting as a catalyst, a slag is pretreated in order to improve the surface area of the slag, a synthesis gas is produced by the gasification reaction of the sample , The pretreated slag is subjected to steam reforming to modify the tar contained in the syngas,
The slag pretreatment method may include at least one of a slag hydrothermal treatment method using steam at a high temperature and a high pressure condition, a slag alkali treatment method using an alkali solution, and a slag alkaline hydrothermal treatment method using a hot alkaline solution Wherein the slag hydrothermal treatment method maintains a subcritical state in the slag hydrothermal treatment method. The method according to claim 1,
The slag hydrothermal treatment method comprises grinding the slag to a size of 1 mm or less in diameter and then maintaining it in a subcritical state of 250 ° C and 40 bar for 5 hours by using a pressure vessel at a mass ratio of distilled water and slag of 30: A method of reforming tar using steelmaking slag. The method according to claim 1,
The slag alkali hydrothermal treatment method is characterized in that the slag is crushed to a size of 1 mm or less in diameter and then maintained in a 1 wt.% Or more NaOH aqueous solution using a pressure vessel for 5 hours at 250 DEG C and 40 bar under subcritical conditions By weight of the steel slag. And a slag reaction furnace which surrounds the outside of the fixed bed gasification furnace. The slag reactor is supplied with slag to reform the tar contained in the syngas, Double tube reactors;
A sample supply unit installed in the fixed bed gasification furnace to supply a sample to the fixed bed gasification furnace;
A slag supply part installed in the slag reaction furnace to supply slag pretreated to the slag reaction furnace;
An oxidant supplier installed in the fixed bed gasifier for gasification reaction;
A steam supply unit installed in the slag reaction furnace for steam reforming; And
And a reaction gas discharge part for discharging the reformed gas to the outside of the slag reaction furnace,
A slag alkaline treatment method using an alkaline solution, and a slag alkaline hydrothermal treatment method using an alkaline solution of a warming treatment, and a slag alkaline hydrothermal treatment method using a hot alkaline solution, And,
Wherein the slag hydrothermal treatment method maintains a sub-critical state. The method of claim 4,
Wherein the steam supply part promotes upward flow of the reformed gas and the high heat and prevents poisoning of the catalyst by carbon deposition of the slag. A fixed-bed gasification furnace for supplying a sample to the inside of the furnace to produce a syngas by a gasification reaction, and supplying the pretreated slag to reform the tar contained in the syngas;
A sample slag supply unit installed in the fixed bed gasification furnace so as to supply slag pretreated with the sample to the fixed bed gasification furnace;
An oxidant supplier installed in the fixed bed gasifier for gasification reaction;
A steam supply unit installed in the fixed bed gasification furnace for steam reforming; And
And a reaction gas discharge portion for discharging the reformed gas to the outside of the fixed bed gasification furnace,
A slag alkaline treatment method using an alkaline solution, and a slag alkaline hydrothermal treatment method using an alkaline solution of a warming treatment, and a slag alkaline hydrothermal treatment method using a hot alkaline solution, And,
Wherein the slag hydrothermal treatment method maintains a sub-critical state. A fixed-bed gasification furnace that receives a sample and generates a syngas by a gas reaction;
A sample supply unit installed in the fixed bed gasification furnace to supply a sample to the fixed bed gasification furnace;
A tar reforming furnace connected to the fixed bed gasification furnace for reforming the tar contained in the syngas of the fixed bed gasification furnace by receiving the pretreated slag;
A slag supply unit installed in the tar reforming furnace to supply slag pretreated to the tar reforming furnace;
An oxidant supplier installed in the fixed bed gasifier for gasification reaction;
A steam supply unit installed in the tar reforming furnace for steam reforming; And
And a reactive gas discharge portion for discharging the reformed gas to the outside of the tar reforming furnace. And a slag reaction furnace for externally supplying a slag to the slag reaction furnace, wherein the pretreated slag is supplied to the fixed bed gasification furnace, A double pipe reaction furnace for reforming the tar contained in the syngas produced in the furnace;
A sample slag supply unit installed in the fixed bed gasification furnace so as to supply slag pretreated with the sample to the fixed bed gasification furnace;
A slag supply part installed in the slag reaction furnace to supply slag pretreated to the slag reaction furnace;
An oxidant supplier installed in the fixed bed gasifier for gasification reaction;
A first steam supply unit installed in the slag reaction furnace for steam reforming;
A second steam supply unit installed in the fixed bed gasification furnace for steam reforming; And
And a reaction gas discharge portion for discharging the reformed gas to the outside of the slag reaction furnace. A fluidized-bed gasification furnace for supplying a sample to the inside of the reactor and generating a syngas by a gasification reaction, and supplying the pretreated slag to reform the tar contained in the syngas;
A sample supply unit installed in the fluidized bed gasification furnace to supply a sample to the fluidized bed gasification furnace;
A slag supply unit installed in the fluidized bed gasification furnace to supply slag pretreated to the fluidized bed gasification furnace;
A fluidized bed jetting plate installed at a lower portion of the fluidized bed gasification furnace to filter the remaining bottoms after gasification;
An oxidant supply unit installed below the fluidized bed ejection plate for gasification reaction;
A steam supply unit installed below the fluidized bed ejection plate for steam reforming; And
And a reaction gas discharge portion for discharging the reformed gas to the outside of the fluidized bed gasification furnace. A fluidized-bed gasification furnace which receives a sample and generates a syngas by a gasification reaction;
A sample supply unit installed in the fluidized bed gasification furnace to supply a sample to the fluidized bed gasification furnace;
A fluidized bed medium supply unit for supplying the fluidized bed medium into the fluidized bed gasification furnace;
A tar reforming line communicating with the fluidized bed gasification furnace to reform tar contained in the syngas produced in the fluidized bed gasification furnace using slag pretreated as a catalyst;
A slag supply unit installed in the tar reforming furnace to supply slag pretreated to the tar reforming furnace;
A fluidized bed jetting plate installed in the fluidized bed gasification furnace for filtering the remaining bottoms after gasification;
An oxidant supply unit installed below the fluidized bed ejection plate for gasification reaction;
A steam supply unit installed in the tar reforming furnace for steam reforming; And
And a reactive gas discharge portion for discharging the reformed gas to the outside of the tar reforming furnace. A fluidized-bed gasification furnace which receives a sample and generates a syngas by a gasification reaction;
A sample supply unit installed in the fluidized bed gasification furnace to supply a sample to the fluidized bed gasification furnace;
A slag primary supply unit installed in the fluidized bed gasification furnace to supply slag pretreated to the fluidized bed gasification furnace;
A tar reforming line communicating with the fluidized bed gasification furnace to reform tar contained in the syngas produced in the fluidized bed gasification furnace using slag pretreated as a catalyst;
A slag secondary supply unit installed in the tar reforming furnace to supply slag pretreated to the tar reforming furnace;
A fluidized bed jetting plate installed at a lower portion of the fluidized bed gasification furnace to filter the remaining bottoms after gasification;
An oxidant supply unit installed below the fluidized bed ejection plate for gasification reaction;
A first steam supply unit installed in the fluidized bed gasification furnace for steam reforming;
A second steam supply unit installed in the tar reforming furnace for steam reforming; And
And a reactive gas discharge portion for discharging the reformed gas to the outside of the tar reforming furnace. A fluidized-bed gasification furnace for supplying a sample to the inside of the reactor and generating a syngas by a gasification reaction, and supplying the pretreated slag to reform the tar contained in the syngas;
A sample supply unit installed in the fluidized bed gasification furnace to supply a sample to the fluidized bed gasification furnace;
A slag supply unit installed in the fluidized bed gasification furnace to supply slag pretreated to the fluidized bed gasification furnace;
A cyclone for receiving the synthesis gas produced in the fluidized bed gasification furnace and separating the slag contained in the synthesis gas;
A downcomer installed at a lower portion of the cyclone for moving the slag separated by the cyclone to a lower portion of the fluidized bed gasification furnace;
A fluidized bed jetting plate installed at a lower portion of the fluidized bed gasification furnace to filter the remaining bottoms after gasification;
An oxidant supply unit installed below the fluidized bed ejection plate for gasification reaction;
A steam supply unit installed below the fluidized bed ejection plate for steam reforming; And
And a reaction gas discharge portion for discharging the reformed gas passed through the cyclone to the outside. A fluidized-bed gasification furnace for supplying a sample to the inside of the reactor and generating a syngas by a gasification reaction, and supplying the pretreated slag to reform the tar contained in the syngas;
A sample slag supply unit installed in the fluidized bed gasification furnace to supply the sample and the pretreated slag to the fluidized bed gasification furnace;
A first cyclone for receiving the synthesis gas produced in the fluidized bed gasification furnace and separating the slag contained in the synthesis gas;
A downfalling pipe installed at a lower portion of the first cyclone to move the slag to a lower portion of the fluidized bed gasification furnace;
A circulation slag supply unit connected to the downcomer to circulate and supply the slag moved to the downcomer;
A reaction gas discharge pipe connected to the downfalling pipe to discharge the reformed gas;
A second cyclone that receives the reformed gas discharged to the reaction gas discharge pipe and separates the dust contained in the reformed gas again;
A fluidized bed jetting plate installed at a lower portion of the fluidized bed gasification furnace to filter the remaining bottoms after gasification;
An oxidant supply unit installed below the fluidized bed ejection plate for gasification reaction;
A steam supply unit installed below the fluidized bed ejection plate for steam reforming; And
And a reaction gas discharge portion for discharging the reformed gas passed through the second cyclone to the outside. The method according to any one of claims 4 to 6,
The slag hydrothermal treatment method comprises grinding the slag to a size of 1 mm or less in diameter and then maintaining it in a subcritical state of 250 ° C and 40 bar for 5 hours by using a pressure vessel at a mass ratio of distilled water and slag of 30: A tar reforming system using steelmaking slag. The method according to any one of claims 7 to 13,
The pre-
A slag alkaline treatment method using an alkaline solution, and a slag alkaline hydrothermal treatment method using an alkaline solution of a warming treatment, and a slag alkaline hydrothermal treatment method using a hot alkaline solution, And,
The slag hydrothermal treatment method comprises grinding the slag to a size of 1 mm or less in diameter and then maintaining it in a subcritical state of 250 ° C and 40 bar for 5 hours by using a pressure vessel at a mass ratio of distilled water and slag of 30: A tar reforming system using steelmaking slag. 16. The method of claim 15,
The slag alkali hydrothermal treatment method is characterized in that the slag is crushed to a size of 1 mm or less in diameter and then maintained in a 1 wt.% Or more NaOH aqueous solution using a pressure vessel for 5 hours at 250 DEG C and 40 bar under subcritical conditions By weight of the steel slag. delete
KR1020150041211A 2015-03-25 2015-03-25 Method and apparatus for removing tar in synthetic gas by using steel-making slag KR101764302B1 (en)

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