JP5859213B2 - Gasification furnace, combined gasification power generation facility, and method for recovering unburned content of gasification furnace - Google Patents

Description

The present invention relates to a gasification furnace and a gasification combined power generation facility for gasifying carbonaceous solids such as coal, and more particularly, to an unburned matter recovery technique suitable for an air-blown coal gasification furnace and the like.
The present invention also relates to a method for recovering unburned matter in a gasifier that gasifies carbonaceous solid.

For example, a gasification furnace such as a coal gasification furnace is an apparatus that heats pulverized coal and other carbonaceous solids and gasifies them by thermal decomposition. Such gasification furnaces such as coal gasification furnaces have oxygen blowing and air blowing methods.
In addition, for example, a coal gasification combined power generation facility using coal as a fuel drives a gas turbine using the gas generated in the coal gasification furnace as fuel, and heat and gas in the gasification furnace. A steam turbine is driven by steam generated from turbine exhaust gas to generate power in a combined cycle.

  That is, in the coal gasification combined power generation facility, a gas turbine that is operated by using a gas supplied from a coal gasification furnace as a fuel drives a generator to generate electricity, and further, in the combustion exhaust gas discharged from the gas turbine. The exhaust heat is recovered to generate steam, and a steam turbine operated by the steam drives a generator to generate electricity. Therefore, the coal gasification combined power generation facility is a high-efficiency power generation facility that efficiently uses the thermal energy held by the gas generated in the coal gasification furnace and drives the generator with a gas turbine and a steam turbine to generate combined power. It becomes.

In the coal gasification furnace described above, the product gas contains unburned matter (hereinafter referred to as “char”), which is a powder / particulate carbon-containing material, and char is recovered from the product gas. Therefore, a char recovery facility (unburned matter recovery facility) for recovering powdered char from the product gas containing char is provided.
The char recovery facility of the oxygen-blown coal gasifier sometimes removes char by passing the product gas mixed with char through water.

On the other hand, as shown in Patent Documents 1 and 2 below, for example, the char recovery equipment for an air-blown coal gasification furnace directly returns the char separated from the generated gas by a cyclone or a filter to the gasification furnace. Configured to recycle. That is, the char recovery facility of the air-blown coal gasifier recovers unburned char generated by thermal decomposition, burns the char in the coal gasifier, and reuses it as a high-temperature reducing gas source.
In this case, in order to put the char into the gasification furnace in a high pressure state, it is necessary to pressurize with the char supply hopper.

Japanese Patent Laid-Open No. 11-106761 JP 2005-120167 A

As described above, the char recovery equipment of the oxygen-blown coal gasification furnace generates waste water containing a large amount of char due to the char recovery, and the processing requires enormous labor and cost.
On the other hand, the char recovery facility of the air-blown coal gasifier is a facility that does not require wastewater treatment. However, in order to put the char into the high-pressure gasification furnace, it is necessary to set the char supply side to a high pressure. For this reason, the conventional char recovery equipment requires an expensive pressure vessel called a char supply hopper with corrosion resistance at high temperatures, and when the char is directly put into the gasification furnace, the equipment configuration A char burner and attached piping equipment are also required.

From such a background, in a gasification furnace such as an air-blown coal gasification furnace, it is desired to improve and simplify an unburned matter recovery facility (char recovery facility) having an expensive and complicated configuration.
The present invention has been made in view of the above circumstances, and its object is to provide a gasification furnace such as a coal gasification furnace equipped with an unburned component recovery facility having a low-cost and simplified configuration, and gasification. An object of the present invention is to provide an unburned matter recovery method for a combined power generation facility and a gasifier.

In order to solve the above problems, the present invention employs the following means.
The gasification furnace according to the present invention generates gas by heating and thermally decomposing carbonaceous solid particles pulverized in the pulverizer unit, and recovering unburned components in the generated gas. A gasification furnace equipped with an unburned component recovery equipment unit to be reused, wherein the unburned component recovery facility unit includes an unburned component separation and recovery unit that separates and recovers unburned components from the generated gas. A heat exchanger that cools the unburned component being conveyed, a decompressor that depressurizes the unburned component being conveyed cooled by the heat exchanger, and the pulverizer unit that stores the unburned component after depressurization An unburned content storage unit for supplying a predetermined amount to the unburned component storage line, and an unburned component transfer line for transporting unburned components from the unburned component separation and recovery unit to the pulverization unit. is there.

According to such a gasification furnace of the present invention, the unburned matter recovery equipment section cools the unburned matter being transported by separating the unburned matter separating and recovering part by separating the unburned matter from the generated gas and collecting it. Heat exchanger, a decompression device that decompresses unburned components being conveyed cooled by the heat exchanger, and an unburned component storage that stores the unburned components after decompression and supplies a predetermined amount to the pulverizer unit Part and an unburned part transfer line for transporting unburned part from the unburned part separating and collecting part to the pulverizing unit, so that the unburned part storage part stores the unburned part after cooling and decompression. Thus, it is supplied to the pulverizing apparatus section at atmospheric pressure. Therefore, in the conventional unburned matter recovery equipment, an expensive pressure vessel called a char supply hopper, which was necessary for putting unburned matter into the high-pressure gasification furnace, becomes unnecessary.
In addition, the unburned portion in the unburned portion storage unit is not directly supplied to the gasification furnace as in the prior art, but is supplied to the pulverizing unit, so the unburned portion is put into the gasification furnace. A char burner and attached piping equipment are also unnecessary.

And in the gasification furnace of the said invention, the unburned matter collect | recovered by the unburned matter separation-and-recovery part to the charbin passes through the unburned matter transfer line to the unburned matter storage part without going through the char supply hopper. It is preferable to be conveyed.
Further, in the gasification furnace of the above invention, the unburned component storage unit is provided to store the unburned component after cooling and decompression conveyed from the charbin and to supply a predetermined amount to the pulverizer unit. It is a container for unburned portion of a non-pressure vessel.
Moreover, in the gasification furnace of the above invention, the unburned matter storage section is structured to be kept warm and sealed, and configured to discharge internal combustible gas by injecting inert gas. As a result, the combustible gas component in the unburned gas storage part existing together with the unburned content flows out of the container together with the injected inert gas (purge gas), so that the unburned gas storage part is brought into a safe atmosphere. Can keep. In this case, it is desirable to continuously inject a small amount of inert gas into the unburned portion storage unit, and the combustible gas component that has flowed out of the container may be incinerated together with the inert gas.

Gasification combined power generation facility according to the present invention is discharged above the gasifier, a gas turbine is operated with the generated gas to be supplied to the fuel to drive the generator from the gasifier, from the gas turbine An exhaust heat recovery boiler that introduces combustion exhaust gas to generate steam, and a steam turbine that is driven by steam supplied from the exhaust heat recovery boiler and drives a generator. .

According to gasification combined power generation facility to the present invention is provided with the gasification furnace of the above, unburned reservoir of the gasification furnace, to store cooling and unburned after decompression As a result, an expensive pressure vessel char supply hopper, which was necessary in the past, is no longer necessary. Further, since the unburned portion in the unburned portion storage unit is not directly supplied to the gasifier, but is supplied to the pulverizing unit, a char burner and attached piping equipment are not required.

The method for recovering unburned matter in a gasification furnace according to the present invention generates a gas by heating and thermally decomposing carbonaceous solid particles pulverized in a pulverizer unit, An unburned matter recovery method for a gasification furnace equipped with an unburned matter recovery equipment unit that recovers and reuses fuel, wherein the unburned matter recovery equipment part removes unburned content from the generated gas. and unburned separation and recovery step of recovering the unburned coal separation collector to separate, non from the unburned separation collector during transport step of unburned transfer line for transporting the unburned into the crusher unit A cooling step for cooling the fuel, a decompression step for decompressing the unburned component in the transporting step of the unburned component transfer line cooled in the cooling step, and a pulverizer for storing the unburned component after the decompression And an unburned content storage / distribution step for supplying a predetermined amount to the unit.
That is, the unburned matter recovery equipment unit unburned from the unburned matter separation and recovery unit to the pulverization unit as a subsequent step of the unburned matter separation and recovery step of separating and recovering unburned matter from the generated gas. A cooling process for cooling unburned parts in the transport process of the unburned part transfer line for transporting the minutes, a decompression process for reducing the unburned parts in the transport process after cooling in the cooling process, and unburned parts after the decompression And an unburned fuel storage / distribution step of supplying a predetermined amount to the pulverizer unit.

According to such an unburned matter recovery method for a gasifier according to the present invention, the unburned matter recovery equipment section separates and recovers unburned matter from the generated gas as a subsequent step of the unburned matter separation and recovery step. a cooling step of cooling the unburned during transport step of unburned transfer line for transporting the unburned from unburned separation collector to the grinding device unit, the unburned during the conveying process in the cooling step Since it includes a decompression step for decompressing after cooling, and an unburned matter storage / distribution step for storing unburned matter after decompression and supplying a predetermined amount to the pulverizer unit, unburned matter after cooling and decompression And a predetermined amount can be supplied to the pulverizer at atmospheric pressure. For this reason, the unburned component recovery facility does not require an expensive pressure vessel such as a char supply hopper, a char burner that complicates the equipment configuration, and attached piping equipment.

And in the unburned matter recovery method of the gasifier of the above invention, the unburned matter recovered in the charbin in the unburned matter separation and recovery step passes through the unburned matter transfer line without passing through the char supply hopper. It is preferable to be supplied to the unburned fuel storage and distribution process.
Further, in the method for recovering unburned content of the gasifier according to the invention, after performing the unburned content separating and recovering step, the cooling step, the depressurizing step, and the unburned matter storing and distributing step are sequentially performed. It is preferable.
Further, in the method for recovering unburned content in a gasifier according to the above invention, the unburned content storage / distribution step includes injecting an inert gas into an unburned content storage container having a heat-insulating and sealed structure so as to combust the inside. It is preferable to discharge the combustible gas, so that the combustible gas component in the unburned gas storage part existing together with the unburned gas flows out of the container together with the injected inert gas (purge gas). The inside of the club can be kept in a safe atmosphere. In this case, it is desirable to continuously inject a small amount of inert gas into the unburned portion storage unit, and the combustible gas component that has flowed out of the container may be incinerated together with the inert gas.

According to the present invention described above, an expensive pressure vessel such as a char supply hopper and a char burner that complicates the apparatus configuration are not required, so that the unburned matter recovery facility becomes inexpensive and has a simplified configuration. It becomes possible to do. Therefore, for the gasification furnace and the combined gasification power generation facility, which are composed of an unburned component recovery facility with a cheap and simplified configuration, in addition to reducing the facility cost, the maintenance cost is reduced by simplifying the device configuration. It becomes possible.
In addition, since the unburned matter having a relatively high temperature is dried and supplied to the pulverizer, moisture of the carbonaceous solid is dispersed and heat is supplied, so that the drying energy for drying the carbonaceous solid can be reduced. .

1 is a system diagram showing an apparatus configuration example of a coal gasification furnace equipped with an unburned matter recovery facility as an embodiment of a gasification furnace according to the present invention. It is a systematic diagram which shows the apparatus structural example of a coal gasification combined cycle power generation facility as a structural example of the gasification furnace provided with the conventional unburned matter collection | recovery facility, and a gasification combined cycle power generation facility.

DESCRIPTION OF EMBODIMENTS Hereinafter, an embodiment of a gasification furnace, a combined gasification power generation facility, and a method for recovering unburned gas from a gasification furnace according to the present invention will be described with reference to the drawings. In addition, in the following description, it is assumed that the carbonaceous solid to be gasified is coal, the coal gasification furnace that gasifies the coal, and the coal gasification combined power generation facility that generates power using the gas generated in the coal gasification furnace as fuel. Although explained, it is not limited to this.
The coal gasification combined power generation facility 1 shown in FIG. 2 is supplied from a coal gasification furnace 10 that heats coal (carbonaceous solid) fine particles in a furnace and gasifies them by thermal decomposition, and the coal gasification furnace 10. A gas turbine facility 50 that operates with the generated gas (coal gas) as a fuel and drives the generator G; a waste heat recovery boiler 70 that generates steam by introducing combustion exhaust gas discharged from the gas turbine facility 50; And a steam turbine 80 that is driven by steam supplied from the heat recovery boiler 70 and drives the generator G.

  The coal gasification furnace 10 is a coal produced by heating fine coal particles (hereinafter referred to as “pulverized coal”) pulverized by the pulverizer unit 20 in the furnace of the gasification furnace main body 11 and gasifying them by thermal decomposition. An unburned matter recovery equipment unit 30 for collecting and reusing unburned content (char) contained in the gas is provided. The coal gasification furnace 10 of this embodiment is air blown, and therefore air is used instead of oxygen as a gasifying agent for partially oxidizing pulverized coal.

The pulverizer unit 20 is a device that pulverizes (finely pulverizes) coal (raw coal) as fuel to produce pulverized coal, and supplies the produced pulverized coal to the coal gasification furnace 10 by gas conveyance.
The pulverizer unit 20 includes a coal bunker 21 that stores coal, a pulverized coal machine (mill) 22 that pulverizes coal supplied from the coal bunker 21 to produce pulverized coal, and pulverized coal for gas transportation. Bag filter 23 for separating the inert gas, a bottle 24 for temporarily storing the pulverized coal after gas separation, and supplying a predetermined amount of pulverized coal to the gasifier main body 11 of the coal gasifier 10. A pulverized coal supply hopper 25 is provided.

In this case, high-temperature gas for drying pulverized coal supplied from the exhaust heat recovery boiler 70 to the pulverized coal machine 22 is used for gas transfer of the pulverized coal, and for example, an inert gas such as nitrogen gas is used. .
Reference numeral 26 in the figure is a pulverized coal drying blower, which has a function of sucking the inert gas separated by the bag filter 23 and sending it to the exhaust heat recovery boiler. Reference numeral 27 in the figure is air compression. It has a function of increasing the pressure of air supplied to the air-blown coal gasifier 10. In this case, the air compressor 27 is provided as a booster that introduces a part of compressed air obtained by compressing the outside air by a compressor 51 of a gas turbine facility 50 described later, and raises the pressure to a pressure that can be supplied into a high-pressure furnace. Yes.

The gasification furnace main body 11 includes a combustor, a reductor, and the like, and is a reaction furnace for heating and gasifying pulverized coal. In the gasification furnace main body 11, the pulverized coal charged is pyrolyzed into coal gas and slag containing char. One coal gas is guided to the unburned fuel recovery equipment section 30 provided on the downstream side of the gasifier main body 11, and the remaining slag is discharged to the outside of the gasifier main body 11 and recovered.
Coal gas generated in the gasification furnace main body 11 passes through a syngas cooler (SGC) 12 provided on the downstream side. The syngas cooler 12 generates a part of the steam that drives the steam turbine 80 by using the heat of the coal gas.

For example, as shown in FIG. 1, the unburned matter recovery equipment unit 30 separates and recovers unburned char from the coal gas that is the generated gas (a cyclone 31, a porous filter 32, and a cyclone 31). A charbine 33) and an unburned component transfer line 34 for conveying the char from the unburned component separating and collecting unit to a char bunker (unburned component storing unit) 28 provided in the pulverizing unit 20.
The coal gas whose temperature has decreased after passing through the syngas cooler 12 first passes through the cyclone 31, whereby the gaseous coal gas and the particulate char are separated. The char separated from the coal gas by the cyclone 31 has a relatively large particle size. The separated char is collected in the char bin 33.

  On the other hand, the coal gas from which the char is removed by the cyclone 31 is guided to a porous filter 32 installed on the downstream side of the cyclone 31. The porous filter 32 is a facility that collects fine char in the coal gas that has not been separated by the cyclone 31 by using a filter. The fine char separated by the porous filter 32 in this manner is collected in the char bin 33 in the same manner as the char separated by the cyclone 31.

Then, the char collected in the char bin 33 is supplied to a char bunker (unburned content storage unit) 28 of the crushing unit 20 through an unburned content transfer line 34 described later.
On the other hand, the coal gas from which fine char has been removed by the porous filter 32 is guided to a gas purification facility 40 provided on the downstream side, and is desulfurized here and used as fuel for the gas turbine facility 50.

The gas turbine equipment 50 includes a compressor 51 that compresses outside air, a combustor 52 that burns fuel to generate high-temperature combustion gas, and a turbine 53 that converts thermal energy held by the combustion gas into rotational kinetic energy. I have.
In the combustor 52, the coal gas supplied from the coal gasification furnace 10 is used as fuel, and combustion is performed using the compressed air supplied from the compressor 51. When the high-temperature combustion gas obtained in this way is supplied to the turbine 53, the driving force of the compressor 51 and the shaft output of the gas turbine equipment 50 are obtained by rotating the turbine 53.

The shaft output of the gas turbine equipment 50 is used to drive the generator G. As a result, since the electric power generated by the generator G can be obtained, a part of the thermal energy held by the coal gas is converted into electric power.
The combustion exhaust gas after rotating the turbine 53 is still at a high temperature and has sufficient thermal energy, and is therefore led to the exhaust heat recovery boiler 70 and used for generating steam. That is, the exhaust heat recovery boiler 70 recovers the exhaust heat held by the combustion exhaust gas and uses it for generating steam.

The steam generated in the exhaust heat recovery boiler 70 is supplied to the steam turbine 80 and used for driving the turbine. The shaft output of the steam turbine 80 obtained in this way is used to drive the generator G. As a result, since the electric power generated by the generator G can be obtained, a part of the thermal energy held by the coal gas is converted into electric power.
In the configuration example shown in FIG. 2, the gas turbine equipment 50 and the steam turbine 80 drive the same generator G, but each dedicated generator G may be driven to generate power.

In the configuration example shown in FIG. 2, reference numeral 81 in the figure denotes a steam condenser that drives the steam turbine, 90 denotes a flare facility for incineration of combustible gas components and inert gas, and 91 denotes an exhaust heat recovery boiler. A chimney that emits the combustion exhaust gas used for generating steam at 70 to the atmosphere.
Further, in the configuration example shown in FIG. 2, reference numeral 92 in the figure is an air separation facility, and the oxygen obtained here is mixed with the air introduced into the coal gasification furnace 10, and nitrogen is not used for conveying pulverized coal. Used as an active gas.

  Here, the system diagram shown in FIG. 1 shows an apparatus configuration example of the coal gasification furnace 10 provided with the unburned matter recovery facility 30, and a part of the coal gasification combined power generation facility 1 shown in FIG. FIG. Accordingly, the same components are denoted by the same reference numerals, and detailed description thereof is omitted. As for the difference in the number of devices shown in the figure, for example, the difference in the number of installed pulverized coal supply hoppers 25 is not particularly meaningful and can be appropriately changed according to various conditions.

In the unburned portion conveying line 34, a heat exchanger 35 for cooling the char being conveyed, a pressure reducing valve (decompressing device) 36 for depressurizing the char being conveyed, and the char after depressurization are stored and the pulverizing unit 20 A char banker 28 is provided for supplying a predetermined amount.
The char bunker 28 stores the collected char and supplies an appropriate amount to the pulverized coal machine 22 of the pulverizer 20 using a quantitative feeder or the like. That is, the pulverized coal machine 22 of the present embodiment mixes and pulverizes the coal supplied from the coal bunker 21 and the char supplied from the char bunker 28.

The heat exchanger 35 is a heat exchanger that cools the char being conveyed and removes rough heat. For example, steam or the like is used as a refrigerant. In the illustrated configuration example, two heat exchangers 35 are installed in series, but there is no particular limitation.
The pressure reducing valve 36 depressurizes the char that is being transported by an inert gas such as nitrogen gas in order to store the char in the char bunker 28 at atmospheric pressure (normal pressure).

  In the coal gasification furnace 10 configured as described above, the char bunker 28 stores the cooled and decompressed char and supplies it to the atmospheric pulverizer 20. Therefore, a pressure vessel required in the conventional unburned matter recovery facility, that is, an expensive pressure vessel called a char supply hopper required for charging the char into the high-pressure coal gasification furnace 10 becomes unnecessary. In addition, a special expansion for canceling the piping reaction force and a special frame for measuring the hopper weight are not required, and this provides a great advantage. The charbanker 28 is added, but it is an inexpensive device because it is not a pressure vessel.

  Furthermore, the char in the charbanker 28 is not supplied directly into the coal gasification furnace 10 but is supplied to the crushing unit 20, so that a char burner for charging the char into the coal gasification furnace 10 and The piping equipment attached to the char burner is also unnecessary. When the char burner becomes unnecessary in this way, the surrounding structure of the coal gasification furnace 10 is simplified, and the number of through portions of the coal gasification furnace 10 that is a pressure vessel is also reduced, so that maintenance costs can be reduced.

  The charbanker 28 is a container having a heat-insulated and sealed structure. And the char banker 28 is comprised so that the inflammable gas which exists in the inside of a container may be discharged | emitted out of a container by inject | pouring inert gas like nitrogen gas. That is, since there is a combustible gas component together with the char inside the char bunker 28, if an inert gas (purge gas) is injected from the outside of the container, the combustible gas can flow out of the container together with the inert gas. In addition, it is possible to maintain a safe atmosphere in which no self-ignition occurs in the container.

In this case, it is desirable that the inert gas injection is performed by continuously injecting a small amount of the inert gas into the container of the char banker 28. When such a small amount of inert gas is continuously injected, it is possible to keep the atmosphere in the container always safe by letting the amount of the inert gas used to a minimum and allowing the combustible gas to flow out. .
Further, the combustible gas component that has flowed out of the container of the charbanker 28 may be incinerated by the flare equipment 90 together with the inert gas.

Similarly, also in the combined coal gasification combined power generation facility 1 including the coal gasification furnace 10 of the present embodiment described above, the char banker 28 of the coal gasification furnace 10 stores the char after cooling and decompression. Thus, an expensive pressure vessel char supply hopper which has been necessary in the past is not necessary.
Further, the char in the charbanker 28 is not directly supplied to the coal gasifier 10 but is supplied to the crushing unit 20, so that a char burner and attached piping equipment are not required, and the apparatus configuration is improved. Simplified.

  When the char is recovered in the coal gasification furnace 10 described above, that is, the pulverized coal obtained by pulverizing the coal in the pulverizer unit 20 is heated in the furnace of the coal gasification furnace 10 and is thermally decomposed to produce gas. If the unburned matter recovery method of the coal gasification furnace 10 including the unburned matter recovery equipment unit 30 that recovers and reuses the char contained in the generated coal gas is performed in the following order of steps: Good.

The step of recovering unburned components of the present embodiment is a step after the unburned component separating and recovering step of separating and recovering char from coal gas in the unburned component separating and collecting unit of the unburned component collecting equipment unit 30. is there.
Therefore, after performing the unburned matter separation and recovery process, in the char transfer process of the unburned matter transfer line 34 for transferring the char from the char bin 33 of the unburned matter separation and recovery unit to the pulverizer unit 20, the heat exchanger 35 A cooling process for cooling the char, a depressurizing process for depressurizing the char being conveyed by the pressure reducing valve 36, and storing and distributing unburned fuel for storing the char after depressurization in the char banker 28 and supplying a predetermined amount to the crushing unit 20 The steps are performed sequentially.

  If such an unburned part recovery method is adopted, the char after cooling and decompression can be stored in the charvanker 28 and a predetermined amount can be supplied to the pulverizer 20 at atmospheric pressure. The unburned component separation and recovery unit does not require an expensive pressure vessel such as a char supply hopper, a char burner that complicates the equipment configuration, and attached piping equipment.

  Further, in the above-described unburned portion storage / distribution step, when an inert gas such as nitrogen gas is injected into the charvanker 28 having a heat-insulated and sealed structure and the combustible gas inside is discharged, the combustible gas in the container is discharged. Since the component flows out of the container together with the inert gas, the inside of the container can be maintained in a safe atmosphere. In this case, it is assumed that a small amount of inert gas is continuously injected into the charbanker 28, and the combustible gas component that has flowed out of the container together with the inert gas is guided to the flare equipment 90 and incinerated.

  As described above, according to the above-described embodiment, an expensive pressure vessel such as a char supply hopper and a char burner that complicates the apparatus configuration are not required, so that the unburned matter recovery facility 30 is inexpensive and simplified. It becomes the composition which did. Accordingly, the coal gasification furnace 10 and the coal gasification combined power generation facility 1 which are composed of the unburned component recovery facility 30 having a simple and inexpensive configuration are not only reduced in equipment cost but also simplified in device configuration. Maintenance costs can also be reduced.

In addition, since the dried and relatively high temperature char is supplied to the pulverizing unit 20, the coal moisture is dispersed by the char and heat is supplied. Therefore, the drying energy for drying the coal to be crushed can be reduced.
In addition, this invention is not limited to embodiment mentioned above, In the range which does not deviate from the summary, it can change suitably.

DESCRIPTION OF SYMBOLS 1 Coal gasification combined cycle power generation equipment 10 Coal gasification furnace 11 Gasification furnace main body 20 Crusher part 21 Coal bunker 22 Pulverized coal machine 23 Bag filter 24 Bin 25 Pulverized coal supply hopper 28 Char bunker (unburned part storage part)
30 Unburned part recovery equipment part 31 Cyclone (unburned part separation and recovery part)
32 Porous filter (unburned component separation and recovery unit)
33 Charbin (unburned matter separation and recovery part)
34 Unburned part transfer line 35 Heat exchanger 36 Pressure reducing valve (pressure reducing device)
50 Gas turbine equipment 70 Waste heat recovery boiler 80 Steam turbine G Generator

Claims (9)

Unburned matter recovery equipment unit that generates carbon by heating and thermally decomposing carbonaceous solid particles pulverized in the pulverizing unit, and recovering and reusing unburned components in the generated gas A gasifier comprising:
The unburned component recovery equipment unit includes an unburned component separation and recovery unit that separates and recovers unburned components from the generated gas, a heat exchanger that cools unburned components being conveyed, and the heat exchanger. A decompression device that depressurizes the cooled unburned portion during transportation, an unburned portion storage portion that stores the unburned portion after decompression and supplies a predetermined amount to the pulverizing device portion, and the unburned portion separation and recovery portion A gasification furnace comprising: an unburned matter transfer line for conveying unburned matter to the pulverizing unit.   The unburned matter collected in the char bin by the unburned matter separating and collecting unit is transported to the unburned matter storage unit through the unburned component transfer line without going through a char supply hopper. The gasification furnace according to 1.   The unburned component storage unit stores unburned component after cooling and decompression conveyed from the charbin, and for unburned component of a non-pressure vessel provided for supplying a predetermined amount to the pulverizer unit. The gasification furnace according to claim 1, wherein the gasification furnace is a container.   The unburned matter storage part has a heat-insulated and sealed structure, and is configured to discharge internal combustible gas by injecting an inert gas. The gasification furnace of any one of Claims.   The gasification furnace according to any one of claims 1 to 4, a gas turbine that is operated by using the generated gas supplied from the gasification furnace as a fuel, drives a generator, and is discharged from the gas turbine. A gasification composite comprising: an exhaust heat recovery boiler that generates steam by introducing combustion exhaust gas; and a steam turbine that is driven by steam supplied from the exhaust heat recovery boiler and drives a generator Power generation equipment. Unburned matter recovery equipment unit that generates carbon by heating and thermally decomposing carbonaceous solid particles pulverized in the pulverizing unit, and recovering and reusing unburned components in the generated gas A method for recovering unburned content of a gasifier comprising:
The unburned component recovery equipment unit separates the unburned component from the generated gas and recovers it to the unburned component separation and recovery unit, and the unburned component separation and recovery unit from the pulverizer unit The cooling process for cooling the unburned part in the transport process of the unburned part transfer line that transports the unburned part to the unburned part, and the unburned part in the transport process of the unburned part transfer line cooled in the cooling process is decompressed An unburned portion of the gasification furnace comprising: a decompressing step for storing, and an unburned portion storing and distributing step for storing the unburned portion after the decompression and supplying a predetermined amount to the pulverizer unit Collection method. The unburned matter recovered in the charbin in the unburned matter separating and collecting step is supplied to the unburned matter storage / distribution step through the unburned matter transfer line without going through a char supply hopper. The method for recovering unburned content of a gasifier according to claim 6 .   8. The gasifier according to claim 6, wherein after performing the unburned component separation and recovery step, the cooling step, the decompression step, and the unburned component storage / distribution step are sequentially performed. Unburned matter collection method.   8. The unburned matter storage / distribution step is characterized in that an inert gas is injected into an unburned matter storage container having a heat-insulated and sealed structure to discharge the combustible gas therein. The unburned matter collection method of the described gasifier.

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