KR20230074345A - Gasfication system for preventing overheating of gasfier - Google Patents

Abstract

An embodiment of the present invention is a syngas generator including a gasifier for generating syngas using waste plastic fuel, and a syngas from which heavy metals, tar, and dust are removed from the syngas generated in the syngas generator. and a recycling device for generating electricity by recycling as a heat source, wherein the syngas generating device discharges stuck substances generated by mixing the waste plastic fuel and fluidized sand to prevent overheating inside the gasifier, and It provides a gasification system for preventing overheating inside the gasifier, characterized in that the yarn is replenished.

Description

Gasification system to prevent overheating inside the gasifier {GASFICATION SYSTEM FOR PREVENTING OVERHEATING OF GASFIER}

The present invention relates to a gasification system for preventing overheating of the inside of a gasifier, and more particularly, by discharging stuck substances generated due to a sudden inflow of fuel or non-fluidization in the process of operating the gasifier, thereby preventing overheating of the inside of the gasifier. It relates to a gasification system that prevents

The most important way for humans to obtain thermal energy and kinetic energy is a large amount of energy released through the combustion of fuel and oxygen. However, today's resource-scarce energy issue has already emerged as the most important strategic issue for countries around the world. The fuel type of energy is gaseous fuel, liquid fuel and solid fuel, and the corresponding fossil energy is natural gas, oil and coal. As we are well aware, fossil energy includes coal, and oil and natural gas are non-renewable energies.

However, biomass energy is a type of renewable energy that is typical of plant photosynthesis of solar energy on a fixed Earth.

On the other hand, solid waste is also abbreviated as solid waste for solid and sludge-like materials discarded by mankind during production and daily life activities. It is a variety of combustible solid waste.

By using these wastes, dependence on mineral energy can be reduced by replacing coal, oil and natural gas, etc., and the country's energy resources can be protected and environmental pollution caused by energy consumption can be reduced. Therefore, internationally, it is actively accelerating the development of new and renewable energy. Among them, the gasification of waste plastics and organic household waste is currently an important direction for energy research in countries around the world, but the problems in terms of production cost and produced gas quality of gasification technology have not yet been completely solved domestically and internationally. Gasification and supply of household waste, such as organic matter and organic matter, has not yet been universalized.

Accordingly, a system is developed to produce electricity or steam using waste plastic as an energy source, reduce energy dependence by operating facilities with the generated electricity, and improve energy efficiency by producing steam for self-utilization or supplying to neighboring companies. It is necessary.

On the other hand, in the process of operating the fluidized bed gasification reactor used in the gasification system as described above, fuel is rapidly introduced or defluidization causes overheating, such as a temperature rise of 100 ° C to 200 ° C within 1 minute. This causes a hot spot.

In general, the internal temperature of the gasifier is about 800 ° C to 900 ° C, but in the above case, it is locally formed up to 1000 ° C to 1100 ° C. It forms, which sticks to the bottom of the gasifier, hinders fluidization and eventually becomes a factor that stops operation.

In particular, when waste plastic is used as a fuel, the flash point and decomposition temperature are different due to various components (PE, PP, PVC, PET, biomass, etc.), which makes temperature control very difficult.

Registered Patent Publication No. 10-1402221 (2014.05.26.) Registered Patent Publication No. 10-1123264 (2012.02.27.)

The technical problem to be achieved by the present invention is to prevent a phenomenon in which a mixture of sand and ash is stuck to the gasifier 111 as the mixture agglomerates as the temperature inside the gasifier rises. It is to provide a gasification system that prevents overheating inside the gasifier that can be prevented.

The technical problem to be achieved by the present invention is not limited to the above-mentioned technical problem, and other technical problems not mentioned can be clearly understood by those skilled in the art from the description below. There will be.

In order to achieve the above technical problem, an embodiment of the present invention is a syngas generating device including a gasifier for generating syngas using waste plastic fuel, and heavy metals mixed in the syngas generated in the syngas generating device. , Including a recycling device for generating electricity by recycling syngas from which tar and dust are removed as a heat source, wherein the syngas generating device is generated by mixing the waste plastic fuel and fluidized sand to prevent overheating inside the gasifier It provides a gasification system for preventing overheating inside the gasifier, characterized in that it discharges the stuck matter and replenishes the fluidized sand.

In an embodiment of the present invention, the gasifier includes a gasifier into which the waste plastic fuel and fluidized sand are introduced, a first transfer member formed at a lower portion of the gasifier, and a temperature sensor for measuring an internal temperature of the gasifier. And, a stuck substance discharge valve installed at the lower end of the first transfer member and opened to discharge the stuck substance to the outside when the temperature inside the gasification furnace measured by the temperature sensor exceeds a critical temperature. However, the gasifier may generate the syngas by heating the waste plastic fuel and the fluidized sand.

In an embodiment of the present invention, the gasifier further includes a pressure sensor installed at a lower end of the first transfer member to measure a pressure inside the gasifier, and as a result of the measurement by the pressure sensor, the gasifier When the internal pressure is higher than the external pressure, nitrogen purge may be performed from the bottom of the gasifier toward the inside of the gasifier when the stuck substance discharge valve is opened.

In an embodiment of the present invention, the gasifier may further include a cooling unit for cooling the first transfer member for discharging the fuel and the fluid sand or the stuck substance.

In an embodiment of the present invention, the syngas generator is installed at the top of the gasifier to compensate for the pressure loss inside the gasifier, which is generated as the stuck substance discharge valve is opened and the stuck substance is discharged. It may further include a fluidized sand input device positioned thereon to supply fluidized sand to an upper portion of the gasification furnace.

In an embodiment of the present invention, the fluidized sand input device includes a fluidized sand inputting chamber in which an internal space accommodating the fluidized sand is formed, and a second fluidized sand inputting chamber formed below the fluidized sand inputting chamber and communicating with the gasifier. A conveying member and a fluidized sand supply valve installed on the second conveying member and opened so that the fluidized sand is introduced into the gasifier when the pressure inside the gasifier is lower than a reference pressure.

In an embodiment of the present invention, the syngas generating device further includes a waste plastic fuel input device communicating with the gasifier and supplying waste plastic fuel injected into the gasifier, wherein the waste plastic fuel input device comprises: It includes a waste plastic input path for accommodating waste plastic fuel, and a third transfer member formed at a lower portion of the waste plastic input path and communicating with the gasifier, wherein the third transfer member transfers the waste plastic fuel to the gasifier. can supply

In an embodiment of the present invention, the syngas generator further includes a cyclone communicating with one side and the other side of the gasifier, and the cyclone removes dust mixed in the syngas supplied from one side of the gasifier. It can be removed and discharged to the outside, and the fluidized sand supplied from the gasifier can be supplied to the other side of the gasifier and reused.

In an embodiment of the present invention, the recycling device includes an activated carbon reactor for removing heavy metals and tar mixed in the dust-removed synthesis gas supplied from the cyclone, and a synthetic reactor from which the heavy metals and tar supplied from the activated carbon reactor are removed. A heat exchanger for exchanging gas heat, an oil scrubber for removing some unconverted tar from the heat-exchanged syngas supplied from the heat exchanger, and dusting impurities mixed in the tar-removed syngas supplied from the oil scrubber And may include a dust collection and moisture removal facility for removing the tar and removing moisture.

In an embodiment of the present invention, the recycling device may further include a syngas recycling unit generating at least one of electricity and steam using the syngas from which the impurities are collected and moisture is removed.

In an embodiment of the present invention, the syngas recycling unit, a gas engine for generating electricity by operating the synthesis gas from which the impurities are collected and moisture is removed as a fuel, and the synthesis gas from which the impurities are collected and moisture is removed It may include a boiler that operates with fuel to produce steam, and a steam turbine that operates based on the steam supplied from the boiler to produce at least one of electricity and steam.

According to an embodiment of the present invention, when a phenomenon in which a mixture of sand and ash is agglomerated as the temperature inside the gasifier rises and sticks to the gasifier occurs , it can be removed immediately, so the operation of the gasifier does not stop and continuous operation is possible.

The effects of the present invention are not limited to the above effects, and should be understood to include all effects that can be inferred from the description of the present invention or the configuration of the invention described in the claims.

1 is a configuration diagram schematically showing the configuration of a waste plastic gasification system according to an embodiment of the present invention.
2 is a diagram showing waste plastic fuel input to a waste plastic gasification system according to an embodiment of the present invention.
FIG. 3 is a view showing agglomerates that are stuck or generated in the lower part of the gasifier due to rapid inflow of fuel or non-fluidization in the course of operating the gasification reactor.
4 is an enlarged view showing in detail the configuration of a gasifier according to an embodiment of the present invention.
5 is an enlarged view showing in detail the configuration of a fluidized sand inserting device according to an embodiment of the present invention.

Hereinafter, the present invention will be described with reference to the accompanying drawings. However, the present invention may be embodied in many different forms and, therefore, is not limited to the embodiments described herein. And in order to clearly explain the present invention in the drawings, parts irrelevant to the description are omitted, and similar reference numerals are attached to similar parts throughout the specification.

Throughout the specification, when a part is said to be "connected (connected, contacted, combined)" with another part, this is not only "directly connected", but also "indirectly connected" with another member in between. "Including cases where In addition, when a part "includes" a certain component, it means that it may further include other components without excluding other components unless otherwise stated.

Terms used in this specification are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, terms such as "include" or "have" are intended to indicate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, but one or more other features It should be understood that the presence or addition of numbers, steps, operations, components, parts, or combinations thereof is not precluded.

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

Hereinafter, the waste plastic gasification system of the present invention will be described with reference to FIG. 1.

1 is a configuration diagram schematically showing the configuration of a waste plastic gasification system according to an embodiment of the present invention.

Referring to FIG. 1 , a waste plastic gasification system 300 according to an embodiment of the present invention includes a syngas generating device 100 and a recycling device 200 .

2(a) and (b) are diagrams showing waste plastic fuel input to the waste plastic gasification system according to an embodiment of the present invention.

The syngas generating device 100 generates syngas using waste plastic fuel, and the syngas generating device 100 for this includes a gasifier 110, a fluidized sand injection device 120, a waste plastic fuel injection device ( 130), a cyclone 140 and a temperature rising burner 150.

Here, the waste plastic fuel is a fuel obtained by shaping the separated and collected waste plastic with a molding machine to have a fluff shape or a pellet shape, as shown in (a) and (b) of FIG. 2 .

2 (a) shows waste plastic fuel in the form of fluff, and (b) shows waste plastic fuel in the form of pellets.

Waste plastic fuel (fluff type) Waste plastic fuel (pellet type) appearance 50mm wide, 50mm long Diameter 30-40 mm, length 100 mm Apparent density 2 to 6 kg/m ³ 227.6 kg/m ³ particle density 280kg/ ^m3 898.8 kg/m ³ form fluff pellet

Specifically, the above-described fluff-shaped and pellet-shaped waste plastic fuel has specifications as shown in [Table 1].

In the course of operating a fluidized bed gasification reactor used in a typical gasification system, overheating occurs, such as a temperature rise of 100 ° C to 200 ° C within 1 minute due to rapid inflow of fuel or defluidization, which causes overheating (hot spot) is created. In general, the internal temperature of the gasifier is about 800 ° C to 900 ° C, but when fuel is rapidly introduced or non-fluidization proceeds, the internal temperature is locally formed up to 1000 ° C to 1100 ° C, and this causes a fluid relationship with fuel (waste plastic). The sand is mixed together to form an agglomerate as shown in FIG. 3, which adheres to the bottom of the gasifier, inhibits fluidization and grows, eventually becoming a factor in stopping operation.

4 is an enlarged view showing in detail the configuration of a gasifier according to an embodiment of the present invention.

Referring to FIG. 4, the gasifier 110 according to an embodiment of the present invention generates synthesis gas by heating waste plastic fuel and fluidized sand. It may include a transfer member 112, a stuck substance discharge valve 113, and a cooling unit 114.

Further, the gasifier 110 according to another embodiment of the present invention, although not shown in the drawing, may be configured to further include a temperature sensor and a pressure sensor. A temperature sensor (not shown) measures the temperature inside the gasifier 111, and a pressure sensor (not shown) is installed at the lower end of the first transfer member 112 to measure the pressure inside the gasifier 110. can

The gasification furnace 111 has an internal space for accommodating waste plastic fuel and fluidized sand. In addition, the gasification furnace 111 may be made of a material having a certain level of rigidity or higher to withstand high temperature and high pressure due to heating.

The gasifier 111 according to an embodiment of the present invention may be positioned upright in the vertical direction as shown in FIG.

The upper part and the lower side of the gasifier 111 communicate with the cyclone 140, the upper part of the gasifier 111 communicates with the fluidized sand input device 120, and the side part of the gasifier 111 communicates with waste plastic fuel input. It may be in communication with device 130 .

In the gasifier 111 according to the structure described above, the fluidized sand supplied from the fluidized sand input device 120 is introduced, and the waste plastic fuel supplied from the waste plastic fuel input device 130 is introduced.

Accordingly, the gasifier 111 generates syngas by heating the fluidized sand and waste plastic fuel, and supplies the fluidized sand and syngas to the cyclone 140 through the upper part of the gasifier 111 .

In addition, the fluidized sand from the cyclone 140 flows into the lower side of the gasification furnace 111 .

Referring to FIG. 4 , the first transfer member 112 is formed below the gasification furnace 111 to discharge ash (including incombustibles) generated in the gasification furnace 111 to the outside along with fluid sand.

The stuck substance discharge valve 113 is installed at the lower end of the first transfer member 112 and opens when the temperature inside the gasifier 111 measured by a temperature sensor (not shown) exceeds a predetermined critical temperature. By doing so, it is possible to discharge the stuck material to the outside.

The stuck substance is generated when the mixture of the fluidized sand and the ashes introduced into the gasifier 111 is agglomerated as the temperature inside the gasifier 111 rises, and the stuck substance is stuck to the gasifier 111. In order to prevent the stuck substance discharge valve 113 located at the lower part of the first transfer member 112, when the internal temperature of the gasifier 111 exceeds the critical temperature, the valve is opened so that the stuck substance is removed from the gasifier 111. ) so that it can be discharged to the outside before being burned to the bottom.

The cooling unit 114 may use cooling water to cool the surface of the first transfer member 112 for discharging fuel (waste plastic), fluidized yarn, or stuck materials.

At this time, the gasifier 110 according to an embodiment of the present invention considers the pressure inside the gasifier 110 measured by a pressure sensor (not shown), and the pressure inside the gasifier 110 is the external pressure. If higher, a nitrogen purge may be performed from the bottom to the top of the gasifier 110 when the stuck-on discharge valve 113 is opened. For example, the gasifier 110 of the present invention may perform nitrogen purge from the lower portion of the first transfer member 112 toward the upper portion of the gasifier 111 in the above case.

According to the first embodiment, the gasifier 110 of the present invention further includes a nitrogen purge unit (not shown) connected to the first transfer member 112 to perform nitrogen purge when the internal pressure of the gasifier is high. do.

5 is an enlarged view showing in detail the configuration of a fluidized sand inserting device according to an embodiment of the present invention.

The fluidized sand input device 120 of the present invention is to compensate for the pressure loss inside the gasifier 110, which occurs as the stuck substance discharge valve 113 of the gasifier 110 is opened and the stuck substance is discharged to the outside. For this purpose, the fluidized sand may be injected into the upper portion of the gasifier 111 located at the top of the gasifier.

Referring to FIG. 5, the fluidized sand input device 120 communicates with the gasifier 110 to supply the fluidized sand to the top of the gasifier 111, which is injected. It may be configured to include an input chamber 121, a second transfer member 122, and a fluidized yarn supply valve 123.

The fluidized yarn input chamber 121 is a chamber in which an internal space accommodating the fluidized yarn is formed, and may have a shape in which the width decreases toward the bottom. ) is formed.

The second transfer member 122 is formed in the lower part of the fluidized sand input chamber 121 and communicates with the upper part of the gasification furnace 111 . The second conveying member 122 serves to transfer the fluidized sand in the fluidized sand input chamber 121 to the gasification furnace 111 .

The fluidized sand supply valve 123 is formed on the second transfer member 122 and opens so that the fluidized sand is supplied into the gasifier 111 when the internal pressure of the gasifier 110 is lower than a predetermined reference pressure. can do.

Here, the pressure inside the gasifier may be measured by a pressure sensor (not shown) of the gasifier 110, and the reference pressure may be a separately preset reference pressure value other than an external pressure.

In addition, according to an embodiment of the present invention, the fluidized sand injection device 120 injects a purge gas such as nitrogen into the fluidized sand input chamber 121 when the inside of the gasifier 110 is pressurized, and inserts the fluidized sand. The pressure inside the chamber 121 may be higher than that of the gasifier 110 so that the fluidized sand is smoothly introduced into the gasifier 111 .

Referring back to FIG. 1, the waste plastic fuel injection device 130 communicates with the gasifier 110 to supply the input waste plastic fuel to the gasifier 110, and the waste plastic fuel injection device 130 for this It may include a waste plastic input path 131, a third transfer member 132, and a pressure gauge (not shown).

The waste plastic input path 131 may have an inner space formed to accommodate the waste plastic fuel, and may have a shape in which the width becomes narrower toward the bottom.

In addition, a third transfer member 132 is formed below the waste plastic input path 131 .

The third transfer member 132 is formed below the waste plastic input furnace 131 and communicates with the lower side of the gasification furnace 111 . The third transfer member 132 serves to transfer the waste plastic fuel in the waste plastic input furnace 131 to the gasification furnace 111 .

At least a part of the pressure gauge 133 is located inside the waste plastic input path 131 to measure the internal pressure of the waste plastic input path 131 in real time. Information on the measured internal pressure of the waste plastic input path 131 may be transmitted to a separate controller (not shown).

The cyclone 140 communicates with one side and the other side of the gasifier 110. More specifically, as shown in FIG. 1, the cyclone 140 communicates with the top and bottom sides of the gasification furnace 111.

Specifically, the cyclone 140 removes dust mixed in the syngas supplied from one side of the gasifier 110 and discharges it to the outside. In addition, the cyclone 140 supplies the fluidized sand supplied from the gasifier 110 to the lower side of the gasifier, which is the other side, so that the fluidized sand can be reused.

The temperature rising burner 150 heats the compressed air supplied to the heat exchanger 220 from the outside to raise the temperature, and then supplies the compressed air to the gasifier 110 . LNG gas and air may be introduced into the temperature rising burner 150 for this purpose, and the heated LPG gas may be discharged to the outside.

However, the temperature increasing burner 150 serves to increase the temperature of the initial fluidized yarn. Therefore, the air that has passed through the heat exchanger 220 may be introduced into the gasifier 110 without being introduced into the temperature rising burner 150 in the future.

The recycling device 200 recycles the syngas from which heavy metals, tar, and dust are removed from the syngas generated in the syngas generator 100 as a heat source to produce at least one of electricity and steam, and a recycling device for this 200 may include an activated carbon reactor 210, a heat exchanger 220, an oil scrubber 230, a dust collection and water removal facility 240, and a syngas recycling unit 250.

Here, heavy metals (= mercury (Hg), cadmium (Cd), lead (Pb), arsenic (Gs), etc.) are generally managed in accordance with the quality standards of solid fuel products (related to Article 20-2), so the above standards Waste plastic fuel that exceeds the limit is unlikely to be brought in.

According to the above quality standards for solid fuel products, mercury is less than 1.0 mg/kg, cadmium is less than 5.0 mg/kg, lead is less than 150 mg/kg, and arsenic is less than 13.0 mg/kg.

However, even if some of the above heavy metals are included, the heavy metals can be removed through an adsorption process in the activated carbon reactor 210 in the present invention.

The activated carbon reactor 210 removes heavy metals and tar mixed in the dust-removed syngas supplied from the cyclone 140.

For this, the upper part of the activated carbon reactor 210 communicates with the cyclone 140 and the lower part of the activated carbon reactor 210 communicates with the heat exchanger 220 .

In addition, the activated carbon reactor 210 adsorbs and decomposes tar (C6 or higher benzene, toluene, naphthalene components, etc.) produced in the gasification process, and the tar is additionally dissolved in the oil scrubber 230 and removed.

The activated carbon reactor 210 supplies syngas from which heavy metals and tar are removed to the heat exchanger 220.

The heat exchanger 220 heat-exchanges the heavy metal and tar-removed syngas supplied from the activated carbon reactor 210. At this time, the heat exchanger 220 may be supplied with compressed air from the outside, and the introduced compressed air is used for heat exchange and then introduced into the gasifier 110 via the temperature rising burner 150.

At this time, since the heating burner 150 is used only to increase the temperature of the initial fluidized sand, the compressed air actually flows into the heating burner 150, but flows into the gasifier 110 via the heating burner 150.

The oil scrubber 230 removes some unconverted tar from the heat-exchanged synthesis gas supplied from the heat exchanger 220, and the oil scrubber 230 for this includes an oil chamber 231 and an oil injection member 232 do.

The oil chamber 231 is a chamber that accommodates oil and communicates with the heat exchanger 220, and may be installed upright as shown in FIG. 1. Accordingly, the oil chamber 231 removes some unconverted tar from the heat-exchanged syngas supplied from the heat exchanger 220 .

Specifically, the oil inside the oil chamber 231 absorbs some unconverted tar into syngas, and the oil containing tar is discharged to the lower portion of the oil chamber 231 .

The upper part of the oil chamber 231 communicates with the dust collection and moisture removal equipment 240 .

In addition, at least a part of the oil spraying member 232 is positioned on the inner upper portion of the oil chamber 231 to spray oil downward.

At least a part of the oil spray member 232 is located inside the oil chamber 231 to spray oil.

The dust collection and moisture removal facility 240 collects impurities mixed in the tar-removed syngas supplied from the oil scrubber 230 and removes dust and moisture.

The above dust collection and moisture removal facility 2400 is where the desired synthesis gas is finally produced in the present invention. Accordingly, the dust collection and moisture removal facility 240 supplies the completed synthesis gas to the synthesis gas recycling unit 250. .

The syngas recycling unit 250 generates at least one of electricity and steam using syngas from which impurities are collected and moisture is removed. ), and a steam turbine 253.

The gas engine 251 generates electricity by operating synthesis gas from which impurities are collected and moisture is removed as fuel. Accordingly, the generated electricity may be directly supplied to a recycling company described below or a profit may be generated through sale.

The boiler 252 produces steam by operating synthesis gas from which impurities are collected and moisture is removed as fuel. Accordingly, the boiler 252 supplies the produced steam to the steam turbine 253.

Meanwhile, the boiler 252 may supply the produced steam not only to the steam turbine 253 but also to the recycling company 400 or neighboring companies.

The steam turbine 253 operates based on the steam supplied from the boiler 252 to generate electricity. As a result, electricity produced may be supplied directly to recycling companies or profit may be generated through sale.

Electricity as described above may be produced through the gas engine 251 or through the boiler 252 and the steam turbine 253.

The above description of the present invention is for illustrative purposes, and those skilled in the art can understand that it can be easily modified into other specific forms without changing the technical spirit or essential features of the present invention. will be. Therefore, the embodiments described above should be understood as illustrative in all respects and not limiting. For example, each component described as a single type may be implemented in a distributed manner, and similarly, components described as distributed may be implemented in a combined form.

The scope of the present invention is indicated by the following claims, and all changes or modifications derived from the meaning and scope of the claims and equivalent concepts should be interpreted as being included in the scope of the present invention.

100: syngas generator
110: gasifier
111: gasifier
112: first transfer member
113: stuck material discharge valve
114: cooling unit
120: fluid injection device
121: fluid injection chamber
122: second transfer member
123: fluidized sand supply valve
130: waste plastic fuel injection device
131: waste plastic input furnace
132: third transfer member
140: cyclone
150: elevated temperature burner
200: recycling device

Claims (11)

A syngas generator including a gasifier for generating syngas using waste plastic fuel;
Including a recycling device for generating electricity by recycling the synthesis gas from which heavy metals, tar, and dust are removed from the synthesis gas generated by the synthesis gas generator as a heat source,
The syngas generator prevents overheating inside the gasifier, characterized in that to discharge the stuck material produced by mixing the waste plastic fuel and the fluidized sand and to replenish the fluidized sand in order to prevent overheating inside the gasifier. gasification system.
According to claim 1,
The gasifier,
A gasifier into which the waste plastic fuel and the fluidized sand are introduced;
A first transfer member formed in the lower part of the gasification furnace;
A temperature sensor for measuring the internal temperature of the gasification furnace;
A stuck substance discharge valve installed at the lower end of the first transfer member and opened to discharge the stuck substance to the outside when the temperature inside the gasification furnace measured by the temperature sensor exceeds a critical temperature,
The gasifier is a gasification system for preventing overheating inside the gasifier, characterized in that the gasifier generates the synthesis gas by heating the waste plastic fuel and the fluidized sand.
According to claim 2,
The gasifier,
It is installed at the lower end of the first transfer member, further comprising a pressure sensor for measuring the pressure inside the gasifier,
As a result of measurement by the pressure sensor, when the pressure inside the gasifier is higher than the external pressure, when the stuck substance discharge valve is opened, nitrogen purge is performed from the bottom of the gasifier toward the inside of the gasifier. A gasification system that prevents overheating inside the gasifier.
According to claim 2,
The gasifier,
The gasification system for preventing overheating inside the gasifier, characterized in that it further comprises a cooling unit for cooling the first transfer member for discharging the fuel and the fluidized sand or the stuck substance.
According to claim 2,
The synthesis gas generator,
In order to compensate for the pressure loss inside the gasifier, which occurs as the stuck substance discharge valve is opened and the stuck substance is discharged, the flow is located at the top of the gasifier and supplies fluidized sand to the top of the gasifier. Gasification system for preventing overheating inside the gasifier, characterized in that it further comprises a sand input device.
According to claim 5,
The fluid injection device,
A fluidized yarn input chamber in which an inner space accommodating the fluidized yarn is formed;
A second transfer member formed below the fluidized sand input chamber and communicating with the gasifier;
It is installed on the second transfer member, and when the pressure inside the gasifier is lower than the reference pressure, the fluidized sand supply valve is opened so that the fluidized sand is introduced into the gasifier. gasification system to prevent
According to claim 2,
The synthesis gas generator,
Further comprising a waste plastic fuel input device communicating with the gasifier and supplying waste plastic fuel injected into the gasifier,
The waste plastic fuel injection device,
a waste plastic input path accommodating the waste plastic fuel;
A third transfer member formed at the bottom of the waste plastic input furnace and communicating with the gasification furnace;
The gasification system for preventing overheating inside the gasifier, characterized in that the third transfer member supplies the waste plastic fuel to the gasifier.
According to claim 1,
The synthesis gas generator,
Further comprising a cyclone communicating with one side and the other side of the gasifier,
The cyclone removes dust mixed in the syngas supplied from one side of the gasifier and discharges it to the outside, and supplies the fluidized sand supplied from the gasifier to the other side of the gasifier for reuse. A gasification system that prevents heating inside the gasifier.
According to claim 8,
The recycling device,
An activated carbon reactor for removing heavy metals and tar mixed in the syngas from which dust is removed supplied from the cyclone;
A heat exchanger for heat-exchanging the syngas from which heavy metals and tar are removed supplied from the activated carbon reactor;
An oil scrubber for removing some unconverted tar from the heat-exchanged syngas supplied from the heat exchanger;
Gasification to prevent heating inside the gasifier, characterized in that it includes a dust collection and moisture removal facility for collecting impurities mixed in the tar-removed syngas supplied from the oil scrubber, removing the tar, and removing moisture system.
According to claim 9,
The recycling device,
The gasification system for preventing heating inside the gasifier, characterized in that it further comprises a syngas recycling unit for generating at least one of electricity and steam using the syngas from which the impurities are collected and the moisture is removed.
According to claim 10,
The syngas recycling unit,
A gas engine that generates electricity by operating the syngas from which the impurities are collected and the moisture is removed as fuel;
A boiler that produces steam by operating the syngas from which the impurities are collected and the moisture is removed as a fuel;
A gasification system for preventing heating inside the gasifier, characterized in that it comprises a steam turbine operating based on the steam supplied from the boiler to produce at least one of electricity and steam.

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