KR20230074346A - Gasfication system using by-pass line for sustainble use of gasfier - Google Patents

Abstract

One embodiment of the present invention provides a gasfication system using a detour pipe for continuous use of a gasifier, including: a synthetic gas generator that generates synthetic gas using waste plastic fuel, and a recycling device that produces electricity by recycling synthetic gas from which heavy metals, tar, and dust mixed in the synthetic gas generated by the synthetic gas generator are removed as a heat source, wherein the recycling device allows the movement path of the synthetic gas to detour using a detour pipe when exceeding a critical differential pressure as the synthetic gas is heat-exchanged.

Description

Gasification system using bypass pipe for continuous use of gasifier {GASFICATION SYSTEM USING BY-PASS LINE FOR SUSTAINBLE USE OF GASFIER}

The present invention relates to a gasification system using bypass piping for continuous use of the gasifier.

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, when the waste plastic gasifier is operated in the gasification system as described above, very high-temperature syngas is supplied to the activated carbon reactor, and accordingly, a large amount of unburned carbon (dust) is generated by the high-temperature syngas, and the connection pipe is As a result, the pressure of the entire system not only increases, but also causes the operation of the gasifier to stop.

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

A technical problem to be achieved by the present invention is to provide a gasification system for preventing a phenomenon in which pipes are clogged as a large amount of unburnt carbon (dust) is generated by high-temperature syngas.

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 for generating syngas using waste plastic fuel, and heavy metals, tar and dust mixed in the syngas generated in the syngas generating device Including a recycling device for generating electricity by recycling the removed synthesis gas as a heat source, wherein the recycling device uses a bypass pipe to change the movement path of the synthesis gas when the critical differential pressure is exceeded by heat exchanging the synthesis gas Provided is a gasification system using a bypass pipe for continuous use of a gasifier, characterized in that bypass.

In an embodiment of the present invention, the syngas generating device communicates with a gasifier including a gasifier into which the waste plastic fuel and fluidized sand are introduced and a first transfer member formed below the gasifier, and the gasifier A fluidized sand injection device for supplying injected fluidized sand to the gasifier, a waste plastic fuel injection device for supplying waste plastic fuel injected through communication with the gasifier to the gasifier, and a cyclone communicating with one side and the other side of the gasifier may further include.

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 heat exchanger includes a first heat exchanger connected to the rear end of the activated carbon reactor and supplied with the syngas from which the heavy metal and tar are removed from the activated carbon reactor, the first heat exchanger and the oil scrubber It may include a second heat exchanger which is disposed between the first heat exchanger and supplies the second heat exchanger to the oil scrubber by heat-exchanging the syngas heat exchanged from the first heat exchanger.

In an embodiment of the present invention, the recycling device is a pipe connecting between the rear end of the activated carbon reactor and an external flare stack, and a vent for transferring the syngas discharged from the activated carbon reactor to the flare stack line, and a first vent valve formed between a rear end of the activated carbon reactor and the vent line, wherein a differential pressure according to a difference between a pressure at a front end of the first heat exchanger and a pressure at a rear end of the heat exchanger is a first critical differential pressure. When the amount exceeds the first heat exchanger, the first vent valve operates to transfer the syngas supplied from the activated carbon reactor to the flare stack instead of the first heat exchanger through the vent line.

In an embodiment of the present invention, the recycling device is formed on a bypass line connecting the first heat exchanger and the oil scrubber and a heat exchanger line connecting the first heat exchanger and the second heat exchanger. And further comprising a second vent valve formed between the heat exchanger line and the bypass line to directly transfer the heat-exchanged syngas supplied from the first heat exchanger to the oil scrubber, When the differential pressure according to the difference between the pressure at the rear end of the second heat exchanger and the pressure at the rear end of the second heat exchanger exceeds the second critical differential pressure, the second vent valve operates to supply the syngas heat-exchanged by the first heat exchanger to the bypass. It can be directly transferred to the oil scrubber through the line.

In an embodiment of the present invention, the gasifier is installed at 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 lower end of the first transfer member, When the temperature inside the gasifier exceeds a critical temperature, a stuck substance discharge valve is opened to discharge the stuck substance to the outside, wherein the gasifier heats the waste plastic fuel and the fluidized sand to generate the syngas. can create

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 waste plastic fuel input device includes a waste plastic input passage for accommodating the waste plastic fuel, and a third transfer member formed below the waste plastic input passage and communicating with the gasification furnace. And, the third transfer member may supply the waste plastic fuel to the gasifier.

In an embodiment of the present invention, the cyclone removes dust mixed in the syngas supplied from one side of the gasifier and discharges it to the outside, and the fluidized yarn supplied from the gasifier to the other side of the gasifier. It can be supplied and reused.

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.

According to an embodiment of the present invention, it is possible to prevent a phenomenon in which pipes are clogged as a large amount of unburnt carbon (dust) is generated by high-temperature syngas.

In addition, according to an embodiment of the present invention, it is possible to increase the continuous operation period of the gasification system, thereby increasing economic benefits (power generation revenue, chemical fuel production, etc.).

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 gasification system using a bypass pipe according to an embodiment of the present invention.
2 is a view showing waste plastic fuel introduced into a gasification system according to an embodiment of the present invention.
3 is a view showing a state in which the connection pipe of the gasification system is blocked by dust generated due to the high-temperature syngas passing through the gasifier.
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 gasification system using a bypass pipe 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]. The gasifier 110 generates syngas by heating waste plastic fuel and fluidized sand, and the gasifier 110 for this includes a gasifier 111 and a first transfer member 112 .

The gasification furnace 111 has an internal space for accommodating waste plastic fuel and fluidized sand, and thus waste plastic fuel and fluidized sand are introduced. 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.

As shown in FIG. 1, the gasifier 111 may be positioned upright in the vertical direction.

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

The first transfer member 112 is formed at the bottom of the gasifier 111 to discharge materials not used in the gasifier 111 to the outside.

The fluidized sand input device 120 communicates with the gasifier 110 to supply the injected fluidized sand to the gasifier 110. A transfer member 122 is included.

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 below the fluidized sand input chamber 121 and communicates with the side of the gas 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 waste plastic fuel input device 130 communicates with the gasifier 110 to supply the inputted waste plastic fuel to the gasifier 110, and the waste plastic fuel input device 130 for this feeds the waste plastic input furnace 131 and a third transfer member 132.

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 .

The cyclone 140 communicates with one side and the other side of the gasifier 110. In more detail, the cyclone 140 communicates with the top and bottom sides of the gasification furnace 111 as shown in FIGS. 1 and 2 .

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 from the outside to raise the temperature and supplies it 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.

The above-mentioned temperature rising burner 150 has an effect of improving energy efficiency by heating compressed air by reusing oil containing tar supplied from the atmospheric pressure chamber unit 270 .

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 includes 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.

In particular, when the recycling device 200 of the present invention heat-exchanges the syngas generated in the syngas generating device 100 and exceeds the critical differential pressure, the movement path of the syngas can be bypassed using a bypass pipe.

Here, heavy metals (= mercury (Hg), cadmium (Cd), lead (Pb), arsenic (As), 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, compressed air may be introduced into the heat exchanger 220 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.

As shown in FIG. 1, the heat exchanger 220 of the present invention includes a first heat exchanger 221, a vent line 222, a first vent valve 223, a second heat exchanger 224, and a bypass line. 225, and a second vent valve 226.

The first heat exchanger 221 is connected to the rear end of the activated carbon reactor 210 and receives the syngas from which heavy metals and tar are removed from the activated carbon reactor 210 .

In addition, the vent line 222 is a pipe connecting between the rear end of the activated carbon reactor 210 and the flare stack 80, and the syngas discharged from the activated carbon reactor 210 is discharged from the flare stack ( 280) can be transferred.

As shown in FIG. 1 , the first vent valve 223 is formed between the rear end of the activated carbon reactor 210 and the vent line 222 .

In general, the syngas passing through the cyclone 140 is discharged with a very high temperature of about 800 to 900 ° C. As a large amount of carbon (dust) is generated, as shown in FIG. 3, the connection pipe connecting the activated carbon reactor 210 and the heat exchanger 220 is blocked, which causes the pressure of the entire system to increase and the gas It even leads to the phenomenon of stopping the operation of firearms.

In order to solve the conventional problem as described above, the recycling apparatus 200 of the present invention has a differential pressure according to the difference between the pressure at the front end of the first heat exchanger 221 and the pressure at the rear end of the first heat exchanger 221 set in advance. When the first critical differential pressure is exceeded, the first vent valve 223 is controlled to flare the syngas supplied from the activated carbon reactor 210 without sending it to the first heat exchanger 221 and through the vent line 222 It can be transferred to the stack 280.

In one embodiment, the recycling device 200 of the present invention controls the control unit (not shown), the pressure at the front end and the pressure at the rear end of the first heat exchanger 221, and the pressure at the rear end of the second heat exchanger 224 It may be configured to further include pressure gauges (not shown) for measuring.

The controller (not shown) operates the first vent valve 223 when the differential pressure according to the difference between the pressure at the front end and the pressure at the rear end of the first heat exchanger 221 measured by the pressure gauges exceeds a first critical differential pressure. to transfer the syngas to the vent line 222, and conversely, if the differential pressure according to the difference between the pressure at the front end and the pressure at the rear end of the first heat exchanger 221 is equal to or less than the first critical differential pressure, supplied from the activated carbon reactor 210 The syngas can be transferred to the first heat exchanger (221).

The second heat exchanger 224 is disposed between the first heat exchanger 221 and the oil scrubber 230 and secondarily heat-exchanges the syngas that has undergone the primary heat exchange from the first heat exchanger 221, resulting in secondary heat exchange. It is a device for supplying syngas to the oil scrubber 230.

The bypass line 225 is a pipe that directly connects the first heat exchanger 221 and the oil scrubber 230 without passing through the second heat exchanger 224 .

And, as shown in FIG. 1 , the second vent valve 226 is formed between the side of the first heat exchanger 221 and the vent line 222 . More specifically, the second vent valve 226 is formed on a heat exchanger line connecting between the first heat exchanger 221 and the second heat exchanger 224, and the line at the rear end of the first heat exchanger 221 It may be located at a branch point branching off into a line going to the second heat exchanger 224 and a bypass line going to the oil scrubber 230.

In one embodiment of the present invention, the controller (not shown) determines the difference between the pressure at the rear of the first heat exchanger 221 and the pressure at the rear of the second heat exchanger 224 measured by pressure gauges (not shown). When the differential pressure exceeds the second critical differential pressure, the second vent valve 226 is operated to transfer the syngas primarily heat-exchanged from the first heat exchanger 221 to the bypass line 225, and vice versa. When the differential pressure according to the pressure difference between the pressure at the rear of the first heat exchanger 221 and the pressure at the rear of the second heat exchanger 224 is equal to or less than the second critical differential pressure, the first heat exchanged syngas is transferred to the second heat exchanger 224 can be transferred to

The bypass line 225 is used when clogging occurs in the second heat exchanger 224, which is a water-cooled heat exchanger, rather than in the first heat exchanger 221, which is an air-cooled heat exchanger. When the differential pressure according to the difference between the pressure at the rear of the heat exchanger 221 and the pressure at the rear of the second heat exchanger 224 exceeds the second critical differential pressure, it is determined that the second heat exchanger 224 is blocked and the second vent The valve 226 is controlled so that the syngas passing through the first heat exchanger 221 can be directly introduced into the oil scrubber 230 through the bypass line 225.

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 FIGS. 1 and 2 . 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.

In the above-described dust collection and water removal facility 240, the syngas desired in the present invention is finally produced. Accordingly, the dust collection and moisture removal facility 240 supplies the completed syngas to the syngas recycling unit 250 .

The syngas recycling unit 250 may generate at least one of electricity and steam by using the syngas from which impurities are collected and moisture is removed.

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.

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. ) before it gets stuck on the bottom so that it can be discharged to the outside.

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 substances.

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.

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 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.

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
120: fluid injection device
130: waste plastic fuel injection device
140: cyclone
150: elevated temperature burner
200: recycling device
210: activated carbon reactor
220: heat exchanger
221: first heat exchanger
222: vent line
223: first vent valve
224: second heat exchanger
225: bypass line
226: second vent valve
230: oil scrubber
240: dust collection and moisture removal equipment
250: syngas recycling unit

Claims (11)

A syngas generating device 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 recycling device is a gasification system using a bypass pipe for continuous use of the gasifier, characterized in that for bypassing the movement path of the syngas using a bypass pipe when the critical differential pressure is exceeded as the heat exchange of the syngas. .
According to claim 1,
The synthesis gas generator,
A gasifier including a gasifier into which the waste plastic fuel and fluidized sand are introduced and a first transfer member formed below the gasifier;
A fluidized sand input device communicating with the gasifier and supplying the injected fluid into the gasifier;
A waste plastic fuel injection device communicating with the gasifier and supplying waste plastic fuel injected into the gasifier;
Gasification system using a bypass pipe for continuous use of the gasifier, characterized in that it further comprises a cyclone communicating with one side and the other side of the gasifier.
According to claim 2,
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;
Bypass pipe for continuous use of 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 Gasification system using.
According to claim 3,
The heat exchanger,
A first heat exchanger connected to the rear end of the activated carbon reactor and receiving the syngas from which the heavy metal and tar are removed from the activated carbon reactor;
Continuous use of the gasifier, characterized in that it comprises a second heat exchanger disposed between the first heat exchanger and the oil scrubber to supply the syngas heat-exchanged from the first heat exchanger to the oil scrubber through secondary heat exchange Gasification system using bypass piping for
According to claim 4,
The recycling device,
a vent line as a pipe connecting between the rear end of the activated carbon reactor and an external flare stack, which transfers syngas discharged from the activated carbon reactor to the flare stack;
Further comprising a first vent valve formed between the rear end of the activated carbon reactor and the vent line,
When the differential pressure according to the difference between the pressure at the front end of the first heat exchanger and the pressure at the rear end of the heat exchanger exceeds a first critical differential pressure, the first vent valve operates to discharge the syngas supplied from the activated carbon reactor into the vent. Gasification system using a bypass pipe for continuous use of the gasifier, characterized in that the transfer to the flare stack rather than the first heat exchanger through the line.
According to claim 4,
The recycling device,
A bypass line connecting between the first heat exchanger and the oil scrubber;
It is formed on a heat exchanger line connecting between the first heat exchanger and the second heat exchanger to directly transfer the heat-exchanged syngas supplied from the first heat exchanger to the oil scrubber. Further comprising a second vent valve formed between the pass lines,
When the differential pressure according to the difference between the pressure at the rear of the first heat exchanger and the pressure at the rear of the second heat exchanger exceeds the second critical differential pressure, the second vent valve operates to generate heat exchanged by the first heat exchanger. A gasification system using a bypass pipe for continuous use of the gasifier, characterized in that the gas is directly transferred to the oil scrubber through the bypass line.
According to claim 2,
The gasifier,
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 gasifier exceeds a critical temperature,
The gasification system using a bypass pipe for continuous use of 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 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, a fluidized sand supply valve is opened so that the fluidized sand is introduced into the gasifier, characterized in that it includes a continuous use of the gasifier. Gasification system using bypass piping for
According to claim 2,
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 using a bypass pipe for continuous use of the gasifier, characterized in that the third transfer member supplies the waste plastic fuel to the gasifier.
According to claim 2,
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. Gasification system using bypass piping for continuous use of the gasifier.
According to claim 1,
The recycling device,
A gasification system using a bypass pipe for continuous use of the gasifier, characterized in that it further comprises a syngas recycling unit for generating at least one of electricity and steam using syngas from which impurities are collected and moisture is removed.

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