JP5808465B2 - Gasification furnace start-up method, gasification furnace, and gasification combined power generation facility - Google Patents

Description

  The present invention relates to a gasification furnace start-up method applied to, for example, an integrated gasification combined cycle / IGCC, and more particularly to a flare system of a gasification furnace.

  Coal gasification combined power generation facility (IGCC) is a power generation facility aiming at higher efficiency and higher environmental performance than conventional coal-fired power generation by gasifying coal and combining it with combined cycle power generation. This coal gasification combined cycle power generation facility has a great merit that it can use coal with abundant resources, and it is known that the merit can be further increased by expanding the applicable coal types.

Conventional coal gasification combined power generation facilities generally include a coal supply device, a coal gasification furnace, a char recovery device, a gas purification facility, a gas turbine facility, a steam turbine facility, and an exhaust heat recovery boiler. . Therefore, coal (pulverized coal) is supplied to the coal gasifier by the coal feeder, and gasifying agents (air, oxygen-enriched air, oxygen, water vapor, etc.) are taken in.
In this coal gasification furnace, coal burns and is gasified, and combustible gas (coal gas) is generated. And the produced combustible gas is gas refined after the unreacted part (char) of coal is removed by the char recovery device, and then supplied to the gas turbine equipment.

The combustible gas supplied to the gas turbine equipment is combusted as a fuel in a combustor to generate high-temperature and high-pressure combustion gas, and the gas turbine of the gas turbine equipment is driven by the supply of the combustion gas.
The exhaust gas after driving the gas turbine generates steam by recovering thermal energy in the exhaust heat recovery boiler. The steam is supplied to a steam turbine facility, and the steam turbine is driven by the steam. Therefore, it is possible to generate electric power with a generator using a gas turbine and a steam turbine as driving sources.
On the other hand, the exhaust gas from which thermal energy has been recovered by the exhaust heat recovery boiler is released to the atmosphere via a chimney.

In the coal gasification combined power generation facility described above, the start process of the coal gasification furnace includes the following steps (1) to (9).
That is, the general start-up process of a coal gasifier is: (1) In-furnace nitrogen gas (N ₂ ) purge, (2) Pressurization / warming in the gasifier, (3) Air ventilation and auxiliary fuel Gasifier ignition, (4) gas passing to porous filter, (5) ramping (pressurization), (6) gas passing to gas purification facility, (7) gasifier fuel switching from auxiliary fuel to coal, (8) Gas turbine fuel switching and (9) load increase are performed in this order.
In addition, although what was mentioned above is a case of air blowing, also in the case of the chemical synthesis plant by oxygen blowing gasification, it is common to the process (7) mentioned above.

In such a start-up process, examples of the auxiliary fuel used at the time of gasification furnace ignition in step (3) include kerosene / light oil and natural gas.
In addition, in the gas turbine fuel switching step (7), the starting fuel (for example, kerosene or light oil) used at the time of starting that cannot receive the supply of coal gas is changed to the coal gas generated in the gasifier. The

In Patent Document 1 below, gasification is performed while flue stack (flare equipment) is combusted with exhaust gas until the gas composition and pressure are stable and the gas turbine can be combusted at the start of the coal gasification combined power generation facility. It is described that warming of a furnace and a gas purifier is performed. In addition, it is also described that a flue stack treatment device for flare stacks is required at a location with severe environmental conditions.
Further, the following Patent Document 2 discloses a coal gasification plant in which a bypass line that branches from the upstream side of the dust removal device to the flare stack is provided in the main system line that connects the coal gasification furnace and the dust removal device. Has been.

Japanese Patent Laid-Open No. 62-182443 JP 2006-152081 A

By the way, in the startup process described above, since nitrogen gas is passed between steps (1) and (2), for example, nitrogen gas having a purity of 99 vol% does not contain substantially oxygen (O ₂ ). However, at the time of gasification furnace ignition in step (3), at least at the beginning of gasification furnace ignition, combustion exhaust gas containing residual oxygen (hereinafter also referred to as “oxygen-containing gas”) is generated.
The reason for “at least the beginning of gasifier ignition” is to pass a gas containing substantially no oxygen again through the porous filter after step (4).

Therefore, when this combustion exhaust gas is passed to the porous filter for dust removal, unburned coal (hereinafter referred to as “char”) present in the filter element burns, so this combustion heat causes the filter element temperature to rise excessively. Cause it.
Such an excessive increase in the filter element temperature may cause the design temperature of the material to be exceeded or damage, and therefore, at the beginning of the gasification furnace ignition, it is necessary to bypass at least the porous filter and process the flare system. Note that. For example, as disclosed in Patent Document 2, a general bypass channel is branched on the upstream side of the cyclone inlet in a pipe channel that connects the gasifier outlet and the cyclone.

  However, in the gasification furnace ignition step according to the above-described method (process), although temporarily, there is a concern that the char remaining in the furnace and the piping is discharged as black smoke from the flare of the flare equipment. . Such discharge of black smoke is not preferable even if it is temporary. Therefore, it is desirable to prevent or suppress the generation of temporary black smoke when the gasifier is started.

  The present invention has been made in order to solve the above-mentioned problems, and the object of the present invention is to start a gasifier capable of preventing or suppressing temporary black smoke generation at the time of starting the gasifier. Is to provide. In other words, the object of the present invention is that char is released from the flare equipment via a flow path that bypasses the filter, because the oxygen-containing gas generated when the gasifier is started is not passed through the porous filter. Is to prevent.

In order to solve the above problems, the present invention employs the following means.
A gasification furnace start-up method according to an aspect of the present invention is a gasification furnace start-up method in which a gasifying agent and a solid carbonaceous fuel are supplied to gasify, and an inert gas is supplied to the gasification furnace. And a start-up burner ignition step of supplying a start-up fuel and an oxygen-containing gas to the start-up burner and igniting the start-up burner in the gasification furnace in an inert atmosphere through which the inert gas is passed through the gas-passing step. And the starting burner ignition step adjusts the supply amount of the oxygen-containing gas so that the combustion gas after the starting fuel and the oxygen-containing gas undergo a combustion reaction becomes an inert gas. To do.

According to such a gasification furnace start-up method, in the gasification furnace in the inert atmosphere through which the inert gas is passed, the start-up burner ignition is performed by supplying the start-up fuel and the oxygen-containing gas to the start-up burner and igniting. Since the process is provided, it is possible to prevent or greatly suppress the generation of oxygen during startup. That is, at the beginning of gasification furnace ignition, the generation of combustion exhaust gas containing residual oxygen can be prevented or suppressed. As a result, in order to remove char that causes black smoke, it is passed through a porous filter as in normal operation. It becomes possible to gas.
In this case, the air ratio in the starting burner ignition process in the inert atmosphere is preferably within a range of 0.7 to 1.1, and a more preferable air ratio is 1. When the air ratio is less than 1, the generation amount of soot and carbon monoxide increases. Therefore, 0.7 is set as the lower limit, and when the air ratio is higher than 1, the generation amount of oxygen is increased and the upper limit is set to 1.1.

A gasification furnace according to an aspect of the present invention is a gasification furnace that supplies and gasifies a gasifying agent and a solid carbonaceous fuel, and a gas supply passage that guides the generated combustible gas to a char recovery device An inert gas supply flow path having an inert gas flow rate adjustment valve for supplying an inert gas into the furnace provided with the start burner, an oxygen supply flow path having an oxygen flow rate adjustment valve for supplying oxygen into the furnace, and the interior of the furnace An air supply flow path having an air flow rate adjustment valve for supplying air to, and the inert gas flow rate adjustment valve, the oxygen flow rate adjustment valve, and a flow rate control unit of the air flow rate adjustment valve, the flow rate control unit, After the gasification furnace is ignited, after the inert gas flow rate adjustment valve is opened and the oxygen flow rate adjustment valve and the air flow rate adjustment valve are closed, the starting fuel and the oxygen-containing gas undergo a combustion reaction Burning Gas is adjusting the supply amount of the oxygen-containing gas such that the inert gas, the starting burner for the start in the gasification furnace under inert atmosphere the inert gas is passing gas from the inert gas supply passage The fuel and the oxygen-containing gas are supplied and ignited.

  According to such a gasification furnace, an inert gas supply flow path having a gas supply flow path for guiding the generated combustible gas to the char recovery device and an inert gas flow rate adjusting valve for supplying the inert gas into the furnace provided with the start burner. An oxygen supply channel having an oxygen on-off valve for supplying oxygen into the furnace, an air supply channel having an air on-off valve for supplying air into the furnace, an inert gas flow rate adjusting valve, an oxygen flow rate adjusting valve, and an air flow rate A flow rate control unit for the regulating valve, and the flow rate control unit controls the flow rate so as to supply an amount of oxygen that can reduce the oxygen concentration in the gas to below the ignition limit concentration. The inside is in an inert atmosphere, and the starting fuel and oxygen-containing gas can be supplied to the starting burner and ignited. As a result, when the gasifier is started, the generation of oxygen can be prevented or greatly suppressed. That is, at the beginning of gasification furnace ignition, the generation of combustion exhaust gas containing residual oxygen can be prevented or suppressed. As a result, in order to remove char that causes black smoke, it is passed through a porous filter as in normal operation. It becomes possible to gas.

  A gasification combined power generation facility according to one aspect of the present invention drives a gas turbine facility using the combustible gas obtained by gasifying the solid carbonaceous fuel with the gasifying agent in the gasification furnace described above to generate power. In addition, the steam turbine is driven by steam generated by recovering heat from the combustion exhaust gas discharged from the gas turbine equipment to generate electric power.

  According to such a gasification combined power generation facility, since the combustible gas obtained by gasifying the solid carbonaceous fuel with the gasifying agent in the gasification furnace described above is used as the fuel, it is desired to start the gasification furnace at the time of startup. The gas generated until the combustible gas with the above properties is obtained is free of particles such as char contained in the gas that causes the generation of black smoke at the stage before being processed by the flare equipment etc. Is done.

  According to the present invention described above, it is possible to provide a gasification furnace capable of preventing or suppressing the generation of temporary black smoke at the time of starting the gasification furnace. In other words, it is possible to remove the char by passing the gas whose oxygen concentration in the gas generated from the gasification furnace is reduced to the ignition limit concentration or less to the porous filter or the existing dust collection equipment. Even during startup, it is possible to prevent or suppress the generation of temporary black smoke.

1 is a system diagram showing a schematic configuration example of an integrated coal gasification combined power plant (IGCC) equipped with a gasification furnace as a gasification furnace start-up method and a gasification furnace according to a first embodiment of the present invention. It is a system diagram which shows the schematic structural example of the coal gasification combined cycle power plant (IGCC) provided with the gasification furnace as 2nd Embodiment of the gasification furnace starting method and gasification furnace which concern on this invention.

DESCRIPTION OF EMBODIMENTS Hereinafter, an embodiment of a gasification furnace starting method, a gasification furnace, and a coal gasification combined power generation facility according to the present invention will be described with reference to the drawings.
The gasification furnace described below is combustible by putting pulverized coal (pulverized coal) into the furnace in a coal gasification combined power generation facility (hereinafter referred to as “IGCC”) 1 as shown in FIG. Used in an apparatus for producing sex gas (coal gas). In the following description, the coal gasification furnace 10 that generates flammable gas from pulverized coal is exemplified, but the gasification furnace of the present invention is, for example, thinned wood, waste wood, driftwood, grass, waste, sludge. It can also be applied to a gasification of another solid carbonaceous fuel such as a biomass fuel such as a tire.

  IGCC1 of 1st Embodiment which shows a schematic structural example in FIG. 1 is combustible by gasifying the pulverized coal supplied with the coal supply apparatus 20 which supplies pulverized coal of a fuel, and a gasifying agent as main components. A coal gasification furnace 10 that generates gas; a char recovery device 30 that separates and recovers char discharged together with combustible gas; a gas purification facility 40 that purifies the combustible gas and removes impurities from the gas; A gas turbine facility 50 that is operated using the purified combustible gas as a fuel, and an exhaust heat recovery boiler (HRSG) 60 that recovers heat in the high-temperature combustion exhaust gas discharged from the gas turbine facility 50 to generate steam. And a steam turbine facility 70 that is operated by steam supplied from the exhaust heat recovery boiler 60.

For the coal gasification furnace 10, for example, a furnace called an air-blown two-stage entrained bed gasification furnace is employed. The gasification furnace 10 includes a combustor unit (high air ratio unit) that obtains high-temperature combustion capable of melting and stabilizing ash, and a reductor unit (low air ratio unit) that performs a gasification reaction by effectively using the high-temperature gas. Is a device for gasifying pulverized coal of solid carbonaceous fuel introduced together with a gasifying agent. And the combustible gas produced | generated in the gasification furnace 10 is guide | induced to the char collection | recovery apparatus 30 mentioned later through the combustible gas supply system (gas supply flow path) 11. FIG.
Examples of the gasifying agent used here include air, oxygen-enriched air, oxygen, water vapor, and the like. For example, oxygen supplied from an oxygen separator (ASU) 80 is mixed with compressed air introduced from the gas turbine equipment 50. Used.

The oxygen separator 80 and the combustor section of the gasifier 10 are connected by an inert gas supply channel 81 and an oxygen supply channel 83. The inert gas supply flow path 81 is a piping flow path for supplying nitrogen gas (inert gas) obtained by the oxygen separation device 80 to the combustor unit, and an inert gas flow rate adjustment valve 82 is provided in the middle of the flow path.
The oxygen supply channel 83 is a piping channel that supplies oxygen gas obtained by the oxygen separator 80 to the combustor unit, and an oxygen flow rate adjustment valve 84 is provided in the middle of the channel.

Further, an air supply passage 55 that receives supply of compressed air extracted as a gasifying agent from a compressor 52 of a gas turbine facility 50 described later is connected to the combustor unit. The air supply channel 55 includes an air flow rate adjustment valve 56 provided in the middle of the channel.
The inert gas flow rate adjustment valve 82, the oxygen flow rate adjustment valve 84, and the air flow rate adjustment valve 56 described above are provided with a flow rate control unit CU that performs respective flow rate control. The flow rate control unit CU performs flow rate control by opening the inert gas flow rate adjustment valve 82 and igniting the oxygen flow rate adjustment valve 84 and the air flow rate adjustment valve 56 when the gasifier is ignited.

  The combustible gas produced | generated in the coal gasification furnace 10 mentioned above is guide | induced to the char collection | recovery apparatus 30 in the state containing char. The char recovery device 30 has a configuration in which a cyclone 31 and a porous filter 32 are connected in series via a connecting pipe 33, and a combustible gas component obtained by separating and removing particles with the cyclone 31 installed on the upstream side is porous. It is introduced into the filter 32. The porous filter 32 is a filter installed on the downstream side of the cyclone 31, and is a facility for collecting the fine char of the combustible gas.

The combustible gas from which the char is separated and removed by the char recovery device 30 is guided to the gas purification facility 40 via the combustible gas supply system 34. In the gas purification facility 40, the combustible gas is purified to remove impurities to obtain a gas having a property suitable for the fuel gas of the gas turbine facility 50.
The combustible gas (fuel gas) generated by the gas purification equipment 40 is supplied to the combustor 51 of the gas turbine equipment 50 via the combustible gas supply system 41 and burned using the compressed air introduced from the compressor 52. To do.

When the combustible gas burns in this way, high-temperature and high-pressure combustion gas is generated and supplied from the combustor 51 to the gas turbine 53. As a result, the high-temperature and high-pressure combustion gas works to drive the gas turbine 53, and the high-temperature combustion exhaust gas is discharged. The shaft output of the gas turbine 53 is used as a drive source for a generator and a compressor 52 described later.
Note that the compressed air supplied from the compressor 52 is not only supplied to the combustor 51 for combustible gas combustion but also partially extracted and boosted by the extracted air booster 54, and then supplied to the air supply flow. It is also used as a gasifying agent for the coal gasifier 10 through the passage 55.

The combustion exhaust gas that has worked in the gas turbine 53 is guided to the exhaust heat recovery boiler 60. The exhaust heat recovery boiler 60 is a facility that recovers heat held in the combustion exhaust gas to generate steam. That is, in the exhaust heat recovery boiler 60, steam is generated by heat exchange between the combustion exhaust gas and water, and the generated steam is supplied to the steam turbine 70, and the combustion exhaust gas whose temperature has been reduced is subjected to necessary processing and then returned to the atmosphere. Released.
The gas turbine 53 and the steam turbine 70 thus driven serve as a driving source for driving the coaxial generator 71 to generate electric power, for example. The gas turbine 53 and the steam turbine 70 may each drive a dedicated generator, and are not particularly limited.

In the startup process when starting the IGCC 1 having the above-described configuration, in the process of the nitrogen gas purge in the furnace in step (1) and the pressurization / warming in the gasification furnace in step (2) described in the prior art, for example, purity 99 vol% nitrogen gas is passed from the oxygen separator 80. For this reason, high-purity nitrogen gas containing substantially no oxygen (O ₂ ) is passed through the porous filter 32.
However, at the time of gasification furnace ignition in step (3), combustion exhaust gas that contains residual oxygen at least at the beginning of ignition of the coal gasification furnace 10 and is difficult to use as a combustible gas is generated. When the combustion exhaust gas passes through the porous filter 32 for dust removal, the char remaining in the filter element is combusted. For this reason, in the conventional apparatus, the bypass main flow path 91 of the bypass piping system that bypasses the char recovery device 30 and reaches the flare facility 90 is provided.

  This bypass main flow path 91 is a gas flow path that branches from the combustible gas supply system 11 to the flare equipment 90 upstream of the inlet of the cyclone 31, and the flow path switching on-off valve 12, 92 is provided.

Further, the bypass main flow path 91 branches from the combustible gas supply system (gas supply flow path) 34 connecting the porous filter 32 and the gas purification equipment 40 upstream of the on-off valve 35 and branches. A branch pipe 37 provided with an on-off valve 36 downstream of the position, and a combustible gas supply system (gas supply flow path) 41 connecting the gas purification equipment 40 and the combustor 51 diverges upstream of the on-off valve 42. In addition, a branch pipe 44 having an on-off valve 43 is connected downstream of the branch position.
The combustible gas supply system 11 downstream from the branch position of the bypass main flow path 91 and upstream from the inlet of the cyclone 31 is provided with a flow path inlet opening / closing valve 12.

  The gasification furnace 10 configured as described above is a process of starting up the IGCC 1, and the nitrogen gas purge in step (1) using the nitrogen gas and the pressure / pressure in the gasification furnace in step (2) are performed. After the warming process is completed, the routine proceeds to step (3), where gasifier ignition is performed. At the time of such gasification furnace ignition, auxiliary fuel such as kerosene / light oil or natural gas is used as a starting fuel, and a sufficient amount of oxygen-containing gas sufficient for complete combustion is supplied. Combustion exhaust gas that contains residual oxygen and is difficult to use as a combustible gas is generated at the beginning of ignition.

Then, the starting method demonstrated below is employ | adopted at the time of starting to ignite the coal gasification furnace 10 which gasifies the pulverized coal introduced with the gasifying agent and produces | generates combustible gas.
That is, in a gasification furnace under an inert atmosphere, a start-up burner ignition process is performed, which includes a start-up burner ignition step of supplying start-up fuel and oxygen-containing gas to the start-up burner BS and igniting.

In the starting burner ignition step, the starting fuel is supplied to the starting burner BS together with the oxygen-containing gas and ignited in the combustor section 10C in the inert atmosphere. At this time, since the ignition of the starting fuel is performed using oxygen of the oxygen-containing gas, the ignition is not hindered even if the surrounding is an inert atmosphere.
When starting fuel is ignited in such an inert atmosphere, it is desirable to employ natural gas (LNG) having particularly excellent ignitability as the starting fuel.

Such a gasification furnace start-up method includes an inert gas flow rate adjustment valve 82 for supplying nitrogen gas into a combustor section provided with a gas supply passage 11 for introducing the generated combustible gas to the char recovery device 30 and a start-up burner BS. An inert gas supply channel 81 having oxygen, an oxygen supply channel 83 having an oxygen flow rate adjusting valve 84 for supplying oxygen into the combustor unit, and an air supply channel 55 having an air flow rate adjusting valve 56 for supplying air into the combustor unit. This can be achieved by including the inert gas flow rate adjustment valve 82, the oxygen flow rate adjustment valve 84, and the control unit CU of the air flow rate adjustment valve 56.
The above-described flow rate control unit CU performs flow rate control by opening the inert gas flow rate adjustment valve 82 at the time of ignition of the gasifier, and performs control to close the oxygen flow rate adjustment valve 84 and the air flow rate adjustment valve 56. is there.

  According to such a gasification furnace startup method, the supply amount of the oxygen-containing gas is adjusted so that the combustion gas after the combustion reaction of the startup fuel and the oxygen-containing gas becomes an inert gas containing substantially no oxygen, Oxygen generation can be prevented or greatly suppressed during startup. That is, at the beginning of ignition of the gasifier, ignition is performed in a state where there is almost no excess oxygen, so that generation of combustion exhaust gas containing residual oxygen can be prevented or suppressed. As a result, the cause of black smoke generation Therefore, gas can be passed through the porous filter 32 as in the normal operation.

  In this case, the air ratio in the starting burner ignition process in the inert atmosphere is preferably within a range of 0.7 to 1.1, and a more preferable air ratio is 1. This is because when the air ratio is less than 1, the generation amount of soot and carbon monoxide increases, so 0.7 is the lower limit of the air ratio. When the air ratio is greater than 1, oxygen is generated due to an increase in the excess oxygen amount. In order to increase the amount, the upper limit of the air ratio is 1.1.

  Thus, if the combustible gas (oxygen-containing gas) can be passed through the porous filter 32 during ignition of the coal gasification furnace 10, char in the gas can be removed by the porous filter 32. Accordingly, a pipe flow path from point A to B of the bypass main flow path 91 is not necessary. That is, not only the piping flow path existing from the points A to B of the bypass main flow path 91 but also the flow path inlet opening / closing valve 92 and the dust collecting device 93 are unnecessary, and further, the flow path inlet opening / closing valve of the combustible gas supply system 11. 12 is also unnecessary.

Next, IGCC 1A of 2nd Embodiment is demonstrated with reference to the schematic structural example shown in FIG. In addition, about the structure similar to embodiment mentioned above, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.
In the illustrated IGCC 1A, the gas furnace 10 includes a gas supply channel 11 that guides the generated combustible gas to the char recovery device 30, an oxygen concentration adjusting unit 100 that supplies nitrogen gas (inert gas) to the gas supply channel 11, and It has. The illustrated oxygen concentration adjusting unit 100 includes a nitrogen gas supply pipe 101 that connects a gas supply channel 11 and a nitrogen gas supply source (not shown), and a nitrogen gas on-off valve 102 provided in the nitrogen gas supply pipe 101. And.

According to the gasification furnace 10 of the IGCC 1A configured as described above, the gas supply channel 11 that guides the generated combustible gas to the char recovery device 30, and the oxygen concentration adjustment unit that supplies nitrogen gas to the gas supply channel 11 100, the oxygen concentration in the combustible gas generated in the gasification furnace 10 can be adjusted by mixing an appropriate amount of nitrogen gas. That is, the oxygen concentration adjusting unit 100 can mix the nitrogen gas upstream of the flare equipment 90 and reduce the oxygen concentration in the gas to the ignition limit concentration or less.
As a result, when the gasification furnace 10 is started, the oxygen concentration in the gas is reduced to the ignition limit concentration or less, so that the char can be prevented from burning even if gas is passed through the porous filter 32. That is, in order to remove char that causes black smoke, gas can be passed through the porous filter 32 as in normal operation.

In IGCC1A mentioned above, when starting the gas furnace 10, the starting method demonstrated below is employ | adopted.
That is, the starting method of the gasifier 10 in the IGCC 1A of the second embodiment is that the inert gas nitrogen gas is mixed into the combustible gas generated in the gasifier 10 upstream of the flare equipment 90 to increase the oxygen concentration in the gas. It has an oxygen concentration reduction process that lowers it to below the ignition limit concentration. For this reason, the combustible gas whose oxygen concentration in the gas has been reduced to the ignition limit concentration or less can prevent char from burning even if it is passed through the porous filter 32, and therefore, char that causes black smoke is removed. Therefore, gas can be passed through the porous filter 32 as in normal operation.

  Even if the configuration and the start-up method of the second embodiment are adopted, the combustible gas (oxygen-containing gas) can be passed through the porous filter 32 when the coal gasifier 10 is ignited. The char inside can be removed by the porous filter 32, and therefore, the pipe flow path from the point A to B of the bypass main flow path 91 becomes unnecessary. That is, not only the piping flow path existing from the points A to B of the bypass main flow path 91 but also the flow path inlet opening / closing valve 92 and the dust collecting device 93 are unnecessary, and further, the flow path inlet opening / closing valve of the combustible gas supply system 11. 12 is also unnecessary.

  Thus, according to each embodiment mentioned above, gasification furnace 10 which enabled prevention or control of temporary black smoke generation at the time of gasification furnace starting can be provided. That is, the oxygen-containing gas generated from the gasification furnace 10 can be passed through the porous filter 32 and the existing dust collection equipment 110 to remove the char. Therefore, even during the operation at the time of starting the gasification furnace, It is possible to prevent or suppress the generation of a black smoke.

And also in IGCC1, 1A provided with the coal gasification furnace 10 which gasifies coal, since the temporary black smoke generation | occurrence | production from the flare equipment 90 can be prevented or suppressed at the time of gasification furnace start-up, the excellent emission level It is possible to provide the equipment that has it.
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.

1,1A Coal Gasification Combined Cycle Power Plant (IGCC)
10 Coal gasifier 11 Combustible gas supply system (gas supply flow path)
12, 92 Channel inlet / outlet valve 20 Charging device 30 Char recovery device 31 Cyclone 32 Porous filter 40 Gas purification facility 50 Gas turbine facility 55 Air supply channel 56 Air flow control valve 60 Waste heat recovery boiler (HRSG)
70 Steam turbine 80 Oxygen separator (ASU)
DESCRIPTION OF SYMBOLS 81 Inert gas supply flow path 82 Inert gas flow rate adjustment valve 83 Oxygen supply flow path 84 Oxygen flow rate adjustment valve 90 Flare equipment 91 Bypass main flow path 100 Oxygen concentration adjustment part BS Startup burner CU Flow rate control part

Claims (4)

A gasification furnace start-up method in which a gasifying agent and solid carbonaceous fuel are supplied and gasified,
A gas passing step of passing an inert gas through the gasifier;
A starting burner ignition step of igniting by supplying a starting fuel and an oxygen-containing gas to the starting burner in the gasification furnace in an inert atmosphere through which the inert gas has been passed by the gas passing step;
The starting burner ignition step adjusts the supply amount of the oxygen-containing gas so that the combustion gas after the combustion reaction between the starting fuel and the oxygen-containing gas becomes an inert gas. starting method.   2. The gasification furnace start-up method according to claim 1, wherein an air ratio of the start-up burner ignition process in the inert atmosphere is within a range of 0.7 to 1.1. A gasification furnace for gasifying by supplying a gasifying agent and a solid carbonaceous fuel,
A gas supply channel for guiding the generated combustible gas to the char recovery device;
A starting burner that is supplied with a starting fuel and an oxygen-containing gas and ignites;
An inert gas supply flow path having an inert gas flow rate adjusting valve for supplying an inert gas into the furnace provided with the activation burner;
An oxygen supply flow path having an oxygen flow rate adjusting valve for supplying oxygen into the furnace;
An air supply flow path having an air flow rate adjusting valve for supplying air into the furnace;
A flow rate control unit for the inert gas flow rate adjustment valve, the oxygen flow rate adjustment valve and the air flow rate adjustment valve;
With
The flow rate control unit controls the opening of the inert gas flow rate adjustment valve and closing the oxygen flow rate adjustment valve and the air flow rate adjustment valve when the gasification furnace is ignited to control the startup fuel and the Adjusting the supply amount of the oxygen-containing gas so that the combustion gas after the oxygen-containing gas undergoes a combustion reaction becomes an inert gas ;
The starting burner supplies the starting fuel and the oxygen-containing gas in the gasification furnace in an inert atmosphere through which the inert gas is passed from the inert gas supply flow path, and ignites the gas. Chemical reactor. The gas turbine according to claim 3 generates power by driving a gas turbine facility using the combustible gas obtained by gasifying the solid carbonaceous fuel with the gasifying agent as a fuel, and combustion discharged from the gas turbine facility. A combined gasification power generation facility that generates electricity by driving a steam turbine with steam generated by heat recovery from exhaust gas.

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