KR102235889B1 - Power generating system by using syngas that pyrolysis and gasification using combustible renewable fuels including biomass - Google Patents

Abstract

The present invention includes a fuel drying input unit including a dry storage silo for drying organic waste fuel; A pyrolysis gas unit for producing syngas by pyrolysis gasification of fuel input from the fuel drying input unit; A gas purification unit including a dust collecting unit, a cooling unit, and a mixing unit for removing impurities contained in the gas transferred from the pyrolysis gas unit; And a gas generator for generating power using the gas supplied from the gas purification unit, wherein the purified synthetic gas of the gas purification unit is circulated to the dust collecting unit or the cooling unit.
Accordingly, according to the present invention, purified synthetic gas after removing impurities mixed in gas generated by pyrolysis of organic waste fuel (combustible renewable fuel including biomass, household, industrial, waste synthetic resin, etc.) can be used. It is possible to produce purified syngas with a homogeneous and stable quality enough to generate power with a turbine.

Description

Pyrolysis gasification and gasification using combustible renewable fuels including biomass {Power generating system by using syngas that pyrolysis and gasification using combustible renewable fuels including biomass}

The present invention relates to a pyrolysis gasification and gas power generation system using combustible renewable fuels including biomass, and in particular, organic waste fuels (solids that can be utilized as all combustible materials including living, industrial, waste synthetic resins, etc.) Or, it relates to a pyrolysis gasification and gas power generation system using a combustible renewable fuel including biomass that has improved the system so that the purified syngas after removing impurities mixed in the gas generated by pyrolysis of liquid fuel can be used and applied.

Unnecessary garbage or waste is generated after productive activities in all fields such as the process of life, industrial production, and medical industry.

Methods of disposing of such waste include landfill, which is gradually stabilized by decomposition of garbage in the ground after being buried in the ground, incineration that can reduce the volume by burning it at a high temperature and utilize the heat generated during this process, and separate required garbage. There are methods such as re-use, recycling, and discharging of manure into the ocean somewhat away from the land. Among these methods, in particular, methods such as discharging manure into the ocean are being banned internationally.

These days, the global environment pollution is serious due to the unprocessed problem of waste plastics, but energy conversion using heat or gas generated during the combustion process replaces fossil fuels and reduces the amount of methane gas generated from landfilling, methane gas (biogas). There is a problem of secondary global pollution such as carbon dioxide gas and fine dust, as well as a means to cope with climate change caused by the high global warming index (21 times carbon dioxide). Therefore, in developed countries, efforts to reduce greenhouse gases are actively made by converting waste into energy such as solid fuel conversion (RDF) of combustible waste and biogas conversion of organic waste.

In line with this trend, related technologies have been proposed in Korea, and the inventors have also proposed a number of technologies in related fields, including references, and are currently making proposals in various fields.

A technology that generates electricity by using heat generated in the process of pyrolysis or incineration of combustible renewable (including non-solidified) fuels that can be used as organic waste fuels (biomass, household, industrial, waste synthetic resin, etc.) among wastes. Was proposed. Most of the methods currently applied are to produce steam using heat generated in a process such as pyrolysis, and use the produced steam to operate a steam turbine to obtain power.

However, in the process of incineration of combustible renewable fuels, various toxic gases including dioxins as well as large amounts of fine dust are generated, which aggravates air pollution and has low efficiency, resulting in global warming due to the large amount of _{CO 2 generated per power generation unit.} It has a problem of weighting.

Accordingly, in the process of combustion, the heat generated through the gas generated through gas combustion was recovered and recycled by steam power generation by converting the first pyrolysis gas to induce complete combustion, but in recent years, the technology has advanced into pyrolysis gas and the gas It is highly desirable in an efficient and eco-friendly way to produce gas by purifying it and recycle it.

In particular, among wastes, a gas engine or gas turbine can be operated using purified synthetic gas after removing impurities mixed in the gas generated by pyrolysis of combustible renewable fuels that can be used as organic waste fuels (biomass, household, industrial, waste synthetic resin, etc.). It is desirable to be able to generate electricity by using it.

[references]

Registered Patent Publication No. 10-0899185 (announced on May 26, 2009)

Unexamined Patent Publication No. 10-2010-0019316 (published on February 18, 2010)

Registered Patent Publication No. 10-0742159 (2007.07.25. Announcement)

Unexamined Patent Publication No. 10-2018-0034033 (published on April 4, 2018)

It is an object of the present invention to use purified synthetic gas after removing impurities mixed in gas generated by pyrolysis of combustible renewable fuel that can be used as organic waste fuel (biomass including living, industrial, waste synthetic resin, etc.) It is to provide a pyrolysis gasification and gas power generation system using a combustible renewable fuel including biomass.

In addition, another object of the present invention is to provide a pyrolysis gasification and gas power generation system using a combustible renewable fuel including biomass capable of producing purified syngas having a stable quality enough to use a gas engine or turbine. will be.

In addition, another object of the present invention is to use nitrogen gas due to the risk of explosion as a purge or pulse gas in the process of purifying a gas containing impurities, but in the present invention, the purified synthetic gas is recycled to explode. Pyrolysis gasification and gas power generation system using combustible renewable fuels containing biomass that can increase economic efficiency while maintaining the calorific value (quality) of the gas, as it prevents danger and uses purified synthetic gas instead of nitrogen gas. To provide.

In addition, another object of the present invention is a pyrolysis gasification and gas power generation system using a combustible renewable fuel including biomass that can utilize the production gas in various fields including the use of purified syngas as a shot blast transfer fluid Is to provide.

An object of the present invention is a fuel drying input unit including a dry storage silo for drying a combustible renewable fuel containing biomass; A pyrolysis gas unit for producing syngas by pyrolysis gasification of fuel input from the fuel drying input unit; A gas purification unit including a dust collecting unit, a cooling unit, and a mixing unit for removing impurities contained in the gas transferred from the pyrolysis gas unit; It is achieved by a gasification power generation system comprising a gas power generation unit for generating power using the gas supplied from the gas purification unit, and circulating the purified synthetic gas of the gas purification unit to the dust collecting unit or the cooling unit.

In addition, the cooling means is downstream of a dust collector including a mixing chamber for cooling the gas generated in the pyrolysis gas unit, and a cyclone or cyclone electric dust collector disposed downstream of the mixing chamber to remove dust and tar from the gas. And a cooling heat exchanger disposed downstream of the cooling heat exchanger to cool the incoming gas, and a cooling scrubber disposed downstream of the cooling heat exchanger to cool the gas and remove impurities, and the dust collecting means comprises the dust collector and the dust collector. It includes a cooling waste heat boiler and a bag filter, and it is preferable to circulate the purified syngas between the cooling heat exchanger and the cooling scrubber to the mixing chamber for rapid cooling.

In addition, it includes a compressed gas storage tank for compressing and storing the gas branched and transferred from the downstream of the mixing buffer tank which is disposed downstream of the cooling scrubber to homogenize the gas supplied to the gas generator, and the compressed gas storage tank It is preferable to use the stored compressed gas for the pulse of the bag filter.

In addition, when the gasification power generation system is stopped, the pyrolysis gas unit, the gas purification unit, or the fluid purging the gas power generation unit compresses and stores exhaust gas containing 5 wt% or less of oxygen exhausted from the gas power generation unit. It is desirable.

In addition, it further comprises a control unit for controlling the dry injection unit, the pyrolysis gas unit, the gas purification unit and the gas power generation unit, the control unit is the pyrolysis gas unit so as to maintain a set quality required by the gas power generation unit. It is characterized in that the transfer ram for transferring the fuel containing pyrolysis gasification is characterized in that it controls the speed and amount of fuel transfer, controls the pyrolysis air, and controls the amount of pyrolysis gasification according to the pressure of the mixing buffer tank. Do.

In addition, a control unit for controlling the dry injection unit, the pyrolysis gas unit, the gas purification unit and the gas power generation unit; The gas purification unit further includes a mixed buffer tank provided to uniformly and uniformly supply the syngas purified by the gas purification unit to the gas generator, wherein the control unit is based on the pressure of the gas stored in the mixed buffer tank. Thus, it is preferable to further include an automatic control valve provided to control the amount of pyrolysis gas production, and to adjust the pressure and amount required by the gas generator.

Accordingly, according to the present invention, purified synthesis after removing impurities mixed in gas generated by pyrolysis of combustible renewable fuel that can be used as organic waste fuel (combustible renewable fuel including biomass, household, industrial, waste synthetic resin, etc.) It is possible to provide a pyrolysis gasification and gas power generation system using a combustible renewable fuel including biomass capable of using gas.

In addition, it is possible to provide a pyrolysis gasification and gas power generation system using a combustible renewable fuel including biomass capable of producing purified syngas having a stable quality such that a gas engine or turbine can operate normally.

In addition, nitrogen gas is used due to the risk of explosion in the process of purifying the gas containing impurities, but in the present invention, the exhaust gas is recycled after gas power generation to prevent the risk of explosion, and at the same time, inexpensive exhaust gas is reduced. Since it is used, it is possible to provide a pyrolysis gasification and gas power generation system using a combustible renewable fuel including biomass that can increase economic efficiency.

In addition, it is possible to provide a pyrolysis gasification and gas power generation system using a combustible renewable fuel including biomass that can be utilized in various fields including a transfer fluid required for shot blasting of purified syngas.

1 is a block diagram of a pyrolysis gasification and gas power generation system using a combustible renewable fuel including biomass according to an embodiment of the present invention;
2A to 2B are flowcharts illustrating a process of circulating and utilizing the purified syngas in a pyrolysis gasification and gas power generation system using a combustible renewable fuel including biomass;
3 is a conceptual diagram illustrating a process of controlling a pyrolysis gasification and gas power generation system using a combustible renewable fuel including biomass.

In accordance with an embodiment of the present invention, a pyrolysis gasification and gas power generation system using a combustible renewable fuel including biomass, and a control method thereof will be described in detail below with reference to FIGS. 1 to 3.

1 is a configuration diagram of a pyrolysis gasification and gas power generation system using a combustible renewable fuel including biomass according to an embodiment of the present invention, and FIGS. 2A to 2B are pyrolysis gasification using a combustible renewable fuel including biomass. And a flow chart illustrating a process of circulating and utilizing the purified syngas in the gas power generation system, and FIG. 3 is a conceptual diagram illustrating a process of controlling the pyrolysis gasification and gas power generation system using a combustible renewable fuel including biomass. .

In accordance with an embodiment of the present invention, a pyrolysis gasification and gas power generation system (100, hereinafter referred to as a'pyrolysis gasification power generation system') using a combustible renewable fuel including biomass is largely divided, as shown in FIG. The "A" part is the area of the dry input unit 110 for drying and inputting the organic waste fuel, and the "B" part is the area of the pyrolysis gas part 120 producing syngas fuel by pyrolysis gasification of the organic waste fuel, and "C. The "section is a gas purification section (not shown) that purifies the produced syngas (a dry or wet device is used in the process of removing foreign substances such as dust contained in the syngas). It is an area of the gas power generation unit 155 that generates electricity by using a gas engine or a gas turbine. Here, the gas purification unit includes a mixing chamber 141 mixed with recycled gas, which is a cooling means, a cooling heat exchanger 146, and a cooling scrubber 147. ) And a cooling waste heat boiler 143, and a dust collector 142 including a cyclone or a cyclone electric dust collector, which is a dust collecting means for removing foreign substances, and a bag filter 145, and if necessary, a cyclone and a wet electric machine. You can use a dust collector.

In the process of proceeding from the "A" part to the "D" part, other parts are included, but the method of purifying the pyrolysis synthesis gas generated in the "B" part and stably supplying it to the "D" part is the core of the present invention. It is a matter. In other words, the quality of clean gas required for gas engines or gas turbines requires very demanding conditions, and in producing clean gas that meets these demanding conditions, there are many problems in the prior art, and these conventional problems are solved. One is the present invention.

For example, the requirements that the clean gas required for a gas engine must have are: First, the clean gas has a heating value of more than a certain amount of heat, and second, the clean gas component is more than a set value, and the fluctuation width is ±2%/30 seconds ( The fluctuation range for 30 seconds is within 2%), third, no tar should exist in the clean gas, and fourth, the moisture present in the clean gas should be less than 25℃ saturated moisture. The inventors of the pyrolysis gasification power generation system 100, which will be described later, capable of implementing such optimal requirements, have been derived by utilizing various experiences, researches, and existing patented technologies in related fields.

In the pyrolysis gasification power generation system 100, purely general air is used, so the calorific value of syngas is very low (1,000 ~ 2,000Kcal/Nm ³ ) unlike LNG or LPG, and the amount and quality of syngas produced according to the input waste fuel conditions. This is characterized by very different. In order to overcome such fluctuating conditions and satisfy conditions required for gas power generation, the present invention is implemented differently from the prior art, as described later.

First, in the "A" process, the fuel having the waste solid organic component is selectively crushed and input, and is introduced into the pyrolysis gas unit 120 through the compression injection device 115 through the simple dry storage silo 111.

The introduced compressed fuel is pulverized through a rotary grinder (distributor, not shown) and supplied to the lower part, and is dried in the fuel drying zone 121 by heating air supplied from the lower heated air injection rotary distributor, and the fuel continues after drying. It is moved to the bottom and pyrolysis takes place near the transfer grate (fixed installation is also possible). This process will be described in more detail as follows.

Most of the heated air supplied by the dried zone air supply fan 122 is discharged to the outside through the purge fan 123 after drying the fuel conveyed from the upper portion, and then mixing the air dried from the fuel and the introduced air. Heat is absorbed and heated by a heat recovery device (e.g., engine exhaust gas heat exchanger, not shown) provided to recover waste heat from the gas discharged in this way, and part of it is supplied to the pyrolysis gasifier. It is gasified and the rest is recycled and supplied for dry air at the top of the pyrolysis furnace.

Then, the fuel that has undergone pyrolysis in the upper part of the grates falls between the grates. At this time, the grate moves periodically to control the amount of fall, and in the case of the fixed grate, the grate is dropped and transferred downward by the periodic rotation of the rotary transfer device 124 at the bottom.

Since most of the fuel dropped to the bottom has undergone pyrolysis of volatile substances, the next step, gasification, can proceed. For gasification, the air supplied by the gasification air supply fan 125 is injected in a heated state through a special nozzle (not shown) at the bottom to promote gasification of the fallen fuel. Stirring is transferred to the next step.

At this time, when the transfer ram transfers the fuel, gasification occurs explosively by stirring. In order to control the gasification of such fuel, a transfer ram may control a transfer speed and a transfer amount of fuel, and one or more rams may be installed in multiple stages according to capacity. In addition, the gasification stage may also be installed in one or more multi-stage, for example, 10 or more multi-stages depending on capacity.

The fuel gasified through this process leaves only ash, and finally, after gasification of residual carbon in the ash, only ash is discharged to the outside. At this time, in order to completely gasify the residual carbon, the residual carbon may be completely gasified through a molten pool using plasma or the like, and only the residual carbon may be discharged to the outside.

In this process through this process, it is preferable to block the inflow of external air by purging the air in the fuel by compressing the fuel in order to block the inflow of external air in the process of introducing the compressed fuel.

Before the input fuel is injected into the pyrolysis gasification part in the pyrolysis furnace, the heating air and the purge fan 123 are used to dry as much as possible.

Two or more transfer rams (more than 10 are possible) are installed so that the thermal decomposition gasification of the injected fuel does not occur in an instant (mass occurs during operation of the transfer ram, etc.), and each operation time and speed are adjusted.

And, in the case of a general incinerator, since a large amount of steam is generated and introduced in the process of being discharged through a water sealing device (a device that seals with water), the remaining ash after combustion or pyrolysis is mechanically compressed to prevent this. Since it is discharged, it can be blocked so that outside air does not flow into the combustion and pyrolysis process when the ash is discharged.

The generated pyrolysis gas has a temperature of 800 ~ 1000 °C, and as it flows downstream, the dust in the gas cracking chamber 126 is centrifuged and dropped to move to the side where the ash is discharged, and the tar and polymer compounds are decomposed. It flows into the “C” part, which is the area to be refined together with. Here, when tar existing without decomposition is attached to the cooling waste heat boiler 143 afterwards, cleaning the interior of the cooling waste heat boiler 143 with a shot blast to remove tar, etc. attached to the inside of the cooling waste heat boiler 143 desirable.

Rapid cooling is required to prevent the generation of free carbon components in the gas introduced into the “C” part of the refining area. To this end, after cooling the purifier, the outlet of the cooling heat exchanger 146 at the rear end of the bag filter 145 The cooled gas (around 60°C) is circulated to the mixing chamber 141 using the mixing chamber circulation blower 171 and mixed with the pyrolysis gas to rapidly cool the 800 ~ 1000°C gas to 500°C (Fig. 2A). See'L113').

The gas that has undergone rapid cooling is a cooling device or cooling means including a cooling waste heat boiler 143 disposed downstream of the dust collector 142 after removing dust through a cyclone type electric precipitator (142, if necessary, only a cyclone can be installed). Here, the cooling waste heat boiler 143 may be provided in a vertical connection type so that there is no clogging of tar or dust that may be introduced into even a minute degree, and a cleaning system using a shot blast method is applied. The gas used for such shot blasting may be circulated by the waste heat boiler circulation blower 173 along'L115' shown in Fig. 2A. A line branched from the upstream of the gas power generation unit 155 and not indicated above is a piping line used for purging the dust collector 142.

In order to remove the dust mixed in the gas, the gas is introduced into the bag filter 145 disposed downstream of the cooling waste heat boiler 143. The bag filter 145 may be installed or replaced with a wet electric precipitator.

After the gas from which the dust has been removed from the bag filter 145 is cooled to about 60°C through a cooling heat exchanger (146, for example, economizer type), some of the gases are mixed in a mixing chamber ( 141), and the remaining gas is cooled while impurities are removed through a cooling scrubber.

Here, in the present invention, a dust collector 142 is applied to prevent a large amount of dust from flowing into the downstream cooling waste heat boiler 143, etc., and a bag filter 145 is provided to remove fine dust passing through the dust collector 142. It is disposed, and is used for removing harmful gases such as acid gas among wastes by water injection. In the case of biomass fuel, it may not be necessary, but it is preferable that a cooling scrubber 147 used for final cooling and removal of harmful gases is used, respectively. Do.

In addition, if necessary, instead of the bag filter 145 and the cooling scrubber 147, a wet electric precipitator may be used.

The syngas purified through this process is transferred under pressure through the rotary blower 151 and stored in the mixing buffer tank 152. Synthetic gas purified in the mixing buffer tank 152 is mixed and stored by a mixing device (not shown) set to be mixed with a time difference (eg, 20 seconds or more).

The purified syngas stored in the mixed buffer tank 152 is dehumidified through the dehumidifier 153, and finally, the gas generator 155 (for example, a gas engine) at an appropriate pressure and an appropriate amount set through the pressure automatic control valve 154. , Gas turbine). Power generation may be performed in the gas power generation unit 155 by the introduced purified syngas.

In addition, the gas branched downstream of the mixed buffer tank 152 and compressed (for example, 6 to 8 bar) by the gas compressor 161 is stored in the compressed gas storage tank 163. The synthesized gas compressed and purified at a high pressure stored in this way may be used for the pulse of the bag filter 145 described above (see “L211” in FIG. 2B). Here, it is preferable that the gas for purge, such as blocking external air in the process of fuel being injected into the pyrolysis gas unit 120, is used by suction and compression (not shown) exhaust gas at the outlet of the engine.

In this process, the dust collector 142 needs a purging fluid, the bag filter 145 needs a pulse fluid, a shot blast fluid of the cooling waste heat boiler 143, and a cooling fluid during rapid cooling. In some cases, the fluid used for purging, pulse, or cooling is compressed air compressed air, whereas fluids applied for purging, pulse, or cooling in the pyrolysis gasification process are at risk of explosion. In the case of the pyrolysis gasification process, nitrogen, which is an inert gas, is used, and the cost of nitrogen is much higher than that of the purified synthesis gas or compressed gas according to the present invention, so that there can be a lot of difference in economic efficiency. In another aspect, when nitrogen is used for pulse, purging, or cooling, there is a problem that the amount of heat generated by the purified synthesis gas decreases due to an increase in the content of nitrogen in the purified synthesis gas. It is preferable that the purified syngas is used, and the purified syngas of low pressure is used for mixing or purging.

That is, the purified synthesis gas capable of operating the gas power generation unit 155 contains 0 wt% oxygen and contains CH ₄ , H ₂ , CO, etc., which can generate a calorific value, so that such purified synthesis gas is used for purging. Even if it is mixed for pulse and cooling, it can prevent explosion with the same gas and it is efficient because it does not change the quality of the produced syngas. In addition, when the system is stopped, the exhaust gas of the gas generator used for safety purge is less than 5wt% of oxygen, and the rest is nitrogen and carbon dioxide, which have inert gas properties, so these gases explode even when mixed with syngas. Because it is out of the range that can be done, explosion can be prevented, so safety is secured and economical when used in the process of operating the system.

According to the present invention, when the purified synthetic gas is recycled and utilized, the gas heat quantity is not changed or the entire process is not affected, and the operation of the generator can be stabilized by homogenizing the gas quality (by circulation, mixing), and nitrogen is reduced. Compared to the conventional technology used, the quality is improved, so that the efficiency is high and economical efficiency can be increased.

Meanwhile, the exhaust gas from the gas generator 155 is cooled by a heat recovery device (not shown), and the cooled exhaust gas is compressed through a compressor, and the compressed air is stored in a storage tank (not shown), and the stored compressed exhaust gas is pyrolyzed and gasified. When the system 100 is stopped, it can also be used for purge of a process line.

And, the control unit 180 according to the present invention, as well as a central control panel capable of controlling and controlling the pyrolysis gasification power generation system 100, like a conventional control unit 180, a flow meter and a thermometer installed in each component or a pipe connecting them. , Various known control means, such as controlling and controlling other components based on a result detected by sensors such as a pressure gauge. Alternatively, the controller 180 may include not only a central control panel but also a local control panel adjacent to each component.

The operation or control process of the pyrolysis gasification power generation system 100 having such a configuration will be described with reference to FIGS. 1 to 3 as follows.

First, as shown in FIG. 3, the inflow of external air is blocked as much as possible through the fuel compression injection device 115. If there is external air inflow, it is forcibly regulated to block the inflow of external air. The external air is primarily purge-blocked by fuel compression, and a small amount of external air introduced in the process of inputting the compressed fuel is mixed and discharged by the purge fan 123 together with dry air. This is because, when external air is introduced, the amount of heated pyrolysis gasification injection air is reduced, so that the gasification efficiency is low and the generated gas is combusted, so that the amount of heat generated by the synthesis gas is reduced.

As the transfer ram is large and large like a general incinerator, it generates a large amount of gas explosively when it is operated in an instant, so several transfer rams with small capacity (multiple including one or more dozens are possible depending on the capacity) It is preferably made of. Agitating and transferring devices are also provided in a number of units, operating at a time difference for stirring, and controlled so that the amount of fuel to be transferred is within a set range so that the amount of heat and components of the generated synthesis gas are stably and uniformly generated ('S117' in Fig. 3). S119').

In order to homogenize the generated gas, a circulation cycle was used (see FIG. 2A, etc.), and the final homogenization of the gas was induced in the mixing buffer tank 152.

The amount of gas generated is a fuel injection device (not shown) including a fuel input amount transfer and stirring device (not shown) by the control unit 180 including the central control panel PLC so that the pressure of the mixed buffer tank 152 can be kept constant. And adjust the pyrolysis gasification injection air control valve (see'S113''S115' in FIG. 3).

In addition, the control unit 180 detects an increase in the amount of power generated by the gas power generation unit 155, adjusts and controls the pressure of the mixed buffer tank 152 and the amount of comparatively produced gas, and supplies purified gas required by the gas power generation unit 155. The pressure of the syngas is adjusted using the automatic pressure control valve 154 (see'S211' and'S213' in FIG. 3).

Accordingly, according to the present invention, purification after removing impurities mixed in gas generated by pyrolysis of combustible renewable fuel that can be used as organic waste fuel (combustible renewable fuel including biomass including biomass including household, industrial, waste synthetic resin, etc.) It is possible to provide a pyrolysis gasification and gas power generation system using a combustible renewable fuel including biomass capable of using the synthesized gas.

In addition, it is possible to provide a pyrolysis gasification and gas power generation system using a combustible renewable fuel including biomass capable of producing purified syngas having a stable quality enough to stably operate a gas engine or turbine.

In addition, nitrogen gas is used due to the risk of explosion in the process of purifying the gas containing impurities, but in the present invention, the purified synthesis gas is recycled to prevent the risk of explosion, and at the same time, the purified synthesis gas is inexpensive compared to nitrogen gas. Because of the use of, it is possible to provide a pyrolysis gasification and gas power generation system using a combustible renewable fuel including biomass that can increase economic efficiency.

In addition, it is possible to provide a pyrolysis gasification and gas power generation system using a combustible renewable fuel including biomass that can be utilized in various fields including a transfer fluid of shot blasting of purified syngas.

Here, although an embodiment of the present invention has been illustrated and described, it will be appreciated that those of ordinary skill in the technical field to which the present invention belongs can modify the present embodiment without departing from the principles or spirit of the present invention. will be. The scope of the invention will be determined by the appended claims and their equivalents.

100: pyrolysis gasification power generation system 110: fuel drying input unit
111: between dry storage 115: compression injection device
120: pyrolysis gas part 121: fuel drying zone
122: dry zone air supply fan 123: purge fan
124: rotary transfer device 125: gasified air supply fan
126: gas decomposition chamber 130: exhaust stack
141: mixing chamber 142: electric dust collector
143: cooling waste heat boiler 145: bag filter
146: cooling heat exchanger 147: cooling scrubber
151: rotary blower 152: mixed buffer tank
153: dehumidifier 154: pressure automatic control valve
155: gas generator 161: gas compressor
163: compressed gas storage tank 171: mixed tank circulation blower
173: waste heat boiler circulation blower 180: control unit

Claims (6)

A fuel drying input unit including a dry storage silo for drying combustible renewable fuels including biomass;
A pyrolysis gas unit for producing syngas by pyrolysis gasification of fuel input from the fuel drying input unit;
A gas purification unit including a dust collecting unit, a cooling unit, and a mixing unit for removing impurities contained in the gas transferred from the pyrolysis gas unit;
Including a gas generator for generating power using the gas supplied from the gas purification unit,
The combustible recycled fuel is first dried in the drying storage silo and then secondly dried in the fuel drying zone of the pyrolysis gas unit,
The pyrolysis gas unit includes a gas cracking chamber in which the temperature of the pyrolysis gas is in the range of 800 to 1000 degrees, and the tar is decomposed and dust is removed, in a form in which a horizontal type and a vertical type are mixed,
Gasification, characterized in that the high-temperature gas flowing into the mixing chamber passing through the gas decomposition chamber is mixed with the purified, cooled and circulated synthetic gas of the gas purification unit in the mixing chamber to rapidly cool the high-temperature gas to prevent carbon regeneration. Power generation system. The method of claim 1,
The cooling means is disposed downstream of a dust collector including a mixing chamber for rapidly cooling the gas generated from the pyrolysis gas unit, and a cyclone or cyclone electric dust collector disposed downstream of the mixing chamber to remove dust and tar from the gas. A cooling heat exchanger configured to cool the incoming gas, and a cooling scrubber disposed downstream of the cooling heat exchanger to cool the gas and remove impurities,
The dust collecting means includes the dust collector, a cooling waste heat boiler and a bag filter disposed downstream of the dust collector,
A gasification power generation system, characterized in that for rapid cooling by circulating the purified syngas between the cooling heat exchanger and the cooling scrubber to the mixing chamber. The method of claim 2,
A compressed gas storage tank disposed downstream of the cooling scrubber to compress and store the gas branched and transferred from the downstream of the mixing buffer tank to homogenize the gas supplied to the gas generator,
And using the compressed gas stored in the compressed gas storage tank for pulses of the bag filter. The method of claim 1,
When the gasification power generation system is stopped, the pyrolysis gas unit, the gas purification unit, or the fluid purging the gas power generation unit is characterized in that the exhaust gas containing 5wt% or less of oxygen exhausted from the gas power generation unit is compressed and stored and used. Gasification power generation system. The method of claim 3,
Further comprising a control unit for controlling the fuel drying injection unit, the pyrolysis gas unit, the gas purification unit and the gas power generation unit,
The control unit controls the speed and amount at which the fuel is transferred by the transfer ram included in the pyrolysis gas part to transfer the pyrolytic gasification fuel so as to maintain the set quality required by the gas power generation unit, and controls the pyrolysis air. And controlling the amount of the pyrolysis gasification according to the pressure of the mixed buffer tank. The method of claim 1,
A control unit for controlling the fuel drying injection unit, the pyrolysis gas unit, the gas purification unit, and the gas power generation unit; The gas purification unit further includes a mixed buffer tank provided to uniformly and uniformly supply the syngas purified by the gas purification unit to the gas power generation unit,
The control unit further comprises an automatic control valve provided to control the amount of pyrolysis gas produced based on the pressure of the gas stored in the mixed buffer tank, and to adjust the pressure and amount required by the gas generator. system.

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