JPS61218688A - Pyrolyzer for hydrocarbon - Google Patents

Abstract

PURPOSE:A gas turbine is equipped with a supercharger and the supercharger or an airflow-variable blower are controlled to enable stable feed of air to the air duct in such an amount as the pyrolyzer needs, even when the tempera ture of the outside air changes. CONSTITUTION:Air is fed through supercharger 66 into the gas turbine 52 for power generation and the feed rate of the air to the supercharger 66 is con trolled with the inlet guide vane 72 which is equipped with a driver. The guide vanes 72 and the driver for supercharger 74 are controlled by the airflow- controlling unit 32 to allow the exhausted gas from the turbine 52 to correspond to the needed volume of air calculated from the fuel consumption in the pyrolyzer 2, even when the outside temperature changes drastically. When the turbine 52 stops, or the needed amount of air comes down to such a level as not to need the exhaust gas from the turbine 52, the airflow-variable blower 38 and auxiliary blower 40 are driven to control the airflow to an appropriate level.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a hydrocarbon pyrolysis apparatus, and particularly relates to an improvement in the means for supplying combustion air to the pyrolysis furnace.
It can be used in equipment for producing propylene and other olefins.

[Background technology and its problems]

Generally, for olefin production, a pyrolysis furnace containing a large number of pyrolysis tubes is used, and an apparatus is used that is configured so that the pyrolyzed gas is immediately introduced into a quencher.

In this pyrolysis furnace, raw materials such as naphtha and kerosene are
Since it is necessary to heat to 0° C. or higher, fuel consumption is extremely large, and from the standpoint of energy conservation, it is required to reduce this fuel consumption.

In response to this demand, an apparatus has been proposed in which a gas turbine is incorporated into a pyrolysis furnace for producing olefins, thereby significantly improving energy efficiency using high-temperature exhaust gas.

(For example, see Japanese Patent Publication No. 59-43514).

Such conventional equipment connects a variable air volume blower in addition to the exhaust hole of the gas turbine to the combustion air supply system of the pyrolysis furnace. This is compensated for by adjusting the air volume of the blower, thereby eliminating the inconvenience caused by connecting only the gas turbine.

However, the above-mentioned conventional device may not be able to compensate for significant changes in the amount and composition of exhaust gas discharged from the gas turbine due to significant changes in outside air temperature or atmospheric pressure.

Further, since the exhaust gas discharged from the gas turbine and the air blown by the blower are significantly different in temperature, oxygen concentration, etc., it is not necessarily easy to control the latter to compensate for the fluctuations in the former.

For these reasons, it is difficult for the above-mentioned conventional devices to perform stable control, especially when there is a large change in the outside air.

[Purpose of the invention]

An object of the present invention is to maintain the amount of exhaust gas discharged from a gas turbine at a predetermined value even if the temperature of the outside air changes, so that the amount of exhaust gas emitted from the gas turbine is maintained at a predetermined value, and the air duct for supplying combustion air to the pyrolysis furnace is An object of the present invention is to provide a hydrocarbon pyrolysis device that can always control the air flow rate to an optimal value.

[Means and effects for solving the problems] The present invention has the following features:
In an air duct that supplies combustion air to a pyrolysis furnace, an exhaust port of a gas turbine and a discharge port of a variable air volume blower are connected, and the gas turbine is provided with a supercharger, and the supercharger or the variable air volume blower is connected to the air duct that supplies combustion air to the pyrolysis furnace. By controlling the
The air required by the decomposition furnace can be stably supplied to the air duct even when the outside air temperature changes.

Specifically, multiple pyrolysis furnaces with built-in hydrocarbon pyrolysis tubes are installed in parallel, and variable air volume blowers and gas turbines are installed in parallel to supply combustion air to these pyrolysis furnaces. In a configuration in which the discharge port of the blower and the exhaust port of the gas turbine are respectively connected to air ducts leading to each pyrolysis furnace, a supercharger is connected to the intake port of the gas turbine, and the air flow rate in the air duct is The structure includes an air flow rate control device that controls either or both of the supercharger and the blower so as to match the air flow rate calculated from the fuel consumption of the pyrolysis furnace.

,〔Example〕 The drawing is a system diagram showing an embodiment of the present invention.

In the figure, as shown in the upper right corner of the figure, a plurality of pyrolysis furnaces 2 are installed in parallel, and each of these pyrolysis furnaces 2 has a built-in multi-tube pyrolysis tube 4. A quencher (not shown) is directly connected to the outlet of the type pyrolysis tube 4.

In addition, saturated hydrocarbons such as naphtha, kerosene, light oil, or natural gas are supplied to each multi-tubular pyrolysis tube 4 as a pyrolysis raw material, and water vapor is diluted by 0.3~ They are mixed and supplied at a weight ratio of 1.0.

Each of the multi-tubular pyrolysis tubes 4 is heated in the pyrolysis furnace 2 to a temperature of 750 to 900°C within a short time, and is immediately quenched to about 350 to 650°C in the quencher.

Each of the pyrolysis furnaces 2 includes an oxygen concentration controller 6 that detects and adjusts the oxygen concentration in the furnace, and a pressure that detects and adjusts the furnace pressure and is cascade-controlled by a signal from the oxygen concentration controller 6. A controller (PIC) 8 is provided, and the inlet duct 10 of the pyrolysis furnace 2 is provided with a manual damper 12, and the outlet duct 14 is provided with an induction fan 18 driven by a motor 16 and an induction fan with a drive source. A fan damper 20 is provided.

Further, the setting value of the oxygen concentration controller 6 is given an optimum value according to the furnace load by the control computer.

Each of the pyrolysis furnaces 2 is provided with a gas burner and an oil burner (not shown), and each of these burners is configured to be supplied with fuel gas and fuel oil from a gas main pipe 22 and an oil main pipe 24, respectively. The main pipe 22 is provided with a detector 26 for detecting state variables such as the flow rate, density, pressure, and temperature of the fuel gas, and the oil main pipe 24 is provided with a flow meter 28 for detecting the flow rate of fuel oil. There is.

The output signals of these detectors 26 and flow meters 28 as well as the output signals of each of the oxygen concentration controllers 6 are input to the air flow rate control device 32 as an excess air rate signal either directly or via an air amount correction controller 30. ing.

The inlet duct 10 of each pyrolysis furnace 2 is connected to an air duct 34 for supplying combustion air to each pyrolysis furnace 2 .

A branch duct 3 branched from the middle of this air duct 34
6 is connected to the discharge ports of the variable air volume blower 38 and the auxiliary blower 40, and the variable air volume blower drive source 42 and the auxiliary air blower drive source 44 of the variable air volume blower 38 and the auxiliary air blower 40 are composed of an electric motor or a steam turbine, etc. The variable air volume blower drive source 42 of the variable air volume blower 38 is configured to be able to control the rotation speed.

At this time, when the variable air volume blower drive source 42 is configured with an electric motor, it is advantageous to control the rotation speed using a frequency converter.

That is, the variable air volume blower drive source 4'' of the variable air volume blower 38
2 is connected to a rotation speed control device 46 consisting of a frequency converter or the like, and a signal from the air flow rate control device 32 is input to this rotation speed control device 46 to control the rotation speed of the variable air volume blower drive source 42. Control takes place.

Further, a discharge outlet damper 48 with a driving source is provided at the outlet of the auxiliary blower 40, and is configured to control air blowing from the auxiliary blower 40 to the branch duct 36.

An exhaust port of a power generation gas turbine 52 is connected to the air duct 34 on the upstream side of the branch duct 36 via a gas turbine exhaust gas duct 50.

Between this gas turbine exhaust gas duct 50 and the branch duct 36, the air duct 34 has a switching damper 54 with a drive source that switches between introducing and blocking the exhaust gas of the power generation gas turbine 52 into the air duct 34. is provided.

Further, a chimney 56 for releasing into the atmosphere is connected to the exhaust gas duct 50 for the gas turbine, and the chimney 56 for releasing into the atmosphere controls whether or not the exhaust gas of the gas turbine for power generation 52 is released to the atmosphere. A discharge damper 58 with a driving source is provided.

This discharge damper 58 with a drive source is operated via a pressure control device 62 by a detection signal from a pressure regulator (1'IC) 60 provided at the confluence of the gas turbine exhaust gas duct 50 and the air duct 34. It is configured such that its opening degree is controlled by

The output from this pressure control device 62 is the furnace internal pressure controller of the pyrolysis furnace 2, that is, the selector that selects each pyrolysis furnace 2 as the drive source of the induced fan artificial damper 20 with the drive source of each pyrolysis furnace 2. (not shown).

At this time, the output signal of the pressure regulator (PIC) 8 of each pyrolysis furnace 2 is also input to the drive source of each induced fan artificial damper 20 with a drive source via a low selector (not shown), and the low selector controls the pressure. device 62 and the pressure regulator (
The lower signal among the output signals of the PIC 8 is transmitted to the drive source of the induced fan artificial damper 20 with a drive source, thereby controlling the damper opening degree.

One end of the intake vibro 4 is connected to the intake port of the power generation gas turbine 52, the other end of this intake pipe 64 is connected to the discharge port of a supercharger 66, and the intermediate portion thereof is connected to a quencher 68. It is designed to be cooled by This quencher 68 is configured to cool the intake vibro 4 by flowing a cooling medium such as water, and to cool the air passing therethrough.

An intake duct 70 is provided at the intake port of the supercharger 66, and an inlet guide vane 72 with a drive source is installed in the intake duct 70, and the inlet guide vane 72 with a drive source controls the air flow rate. It is configured to be controlled by a control device 32.

The supercharger 66 is driven by a supercharger drive s''t4, and this supercharger drive source 74 is connected to the air flow control device 32.
controlled by

In this case, normally only the supercharger drive source 74 is controlled preferentially, and the rotation speed control device 46 is in a stopped state, so that when the power generation gas turbine 52 is stopped, etc. Control is performed as necessary.

A trip detection control device 78 is provided which is activated by a trip signal of the power generation gas turbine 52 in consideration of the case where the power generation gas turbine 52 trips, that is, the power generation gas turbine 52 stops for some reason. .

The output signal of the trip detection control device 78 is inputted to the auxiliary blower drive source 44 of the variable air volume blower 38 and is manually applied to the auxiliary blower drive source 44 of the variable air volume blower 38 to start the variable air volume blower 38, and the delay circuit It is inputted to the drive source of the discharge damper 48 via 80, and this discharge damper 48 is opened after the variable air volume blower starts up on the 3rd day.

Further, the output signal of the trip detection control device 78 is inputted to the drive sources of the switching damper 54 with a drive source of the air duct 34 and the discharge damper 58 with a drive source of the chimney 56 for releasing into the atmosphere, and the switching damper 54 with a drive source is The discharge damper 58 with a driving source is driven from closed to open from open to closed.

Furthermore, the same output signal is also sent to the fuel control meter of the pyrolysis furnace 2, and the flow rate in the multi-tubular pyrolysis tube 4 of the pyrolysis furnace 2 is minimized for a predetermined period of time to reduce the furnace load. The fuel flow rate is reduced to compensate for the lack of oxygen in the furnace until the auxiliary blower 40 is fully driven.

Furthermore, after the auxiliary blower 40 is activated, it is configured to return to operation at a steady flow rate.

In addition, if the auxiliary blower 40 does not operate, the fuel is cut off and the pyrolysis furnace 2 is shut down.

On the downstream side of the branch duct 36 of the air duct 34, that is, on the pyrolysis furnace 2 side, there is a temperature detector (T/C) 82) pressure that detects the temperature inside the pyrolysis furnace 2 from the left side in the figure. A pressure detector (PT) 84 for detecting the fuel air flow rate, a flow rate detector (FT) 86 for detecting the fuel air flow rate, and an acidity concentration detector (Ox) 88 for detecting the oxygen concentration in the fuel air are provided. Detector (T/C) 82) Pressure detector (PT)
84, flow rate detector (FT) 86 and acidity concentration detector (0
, ) 88 is input to the air flow control device 32 .

This air flow control device 32 includes these temperature detectors (T
/C) 82) Pressure detector (PT) 84, flow rate detector (F
T) 86 and the acidity concentration detector (in addition to the output signals of the 88, as described above, the output signals from the acidity concentration controller 6 of each pyrolysis furnace 2, and the detector of the gas main pipe 22) 26
and the output signals of the flowmeter 28 of the oil main tube 24 are input, and the supercharger drive source 74 is controlled so that the air flow rate in the pyrolysis furnace 2 is appropriate based on these signals.
Alternatively, it is configured to output a control signal to the drive source input log guide base 772 in a predetermined split range.

That is, the air flow rate control device 32 determines the required amount of oxygen from the amount of cracking furnace fuel in the gas main pipe 22 and the oil main pipe 24, and adds the excess air rate from the air amount correction controller 30 to this required oxygen amount. The inlet guide vane 72 with drive source or supercharging is adjusted so that the calculated value becomes the supply oxygen flow rate obtained by correcting the product of the air flow rate and oxygen concentration of the air duct 34 based on temperature and pressure. Visceral motion source 74
is configured to control.

The control of the drive source guide bay 772 and the supercharger part drive source 74 by the air flow rate control device 32 can be performed by controlling the pyrolysis furnace 2 by using only signals such as the air flow rate of the air duct 34 and the fuel flow rate. The optimum amount of air (oxygen amount) required by each temperature sensor (T/C) 8 can be calculated.
2) Pressure detector (PT) 84. Flow rate detector (FT) 86
, acidity concentration detector (Ox) 88. In consideration of the case where the optimum air amount cannot be maintained due to errors in the detector 26, flow meter 28, etc., an excess air ratio signal of the pyrolysis furnace 2 is introduced, and the calculation result based on the supply air flow rate etc. is corrected. It is something that

Next, the operation of this embodiment will be explained by case.

When starting the pyrolysis furnace 2 and the power generation gas turbine 52 at the same time when starting the operation of the apparatus, the discharge damper 58 with a driving source of the chimney 56 for releasing into the atmosphere is opened, and the driving source in the air duct 34 is opened. The attached switching damper 54 is fully opened, and the manual damper 12 in the inlet duct 10 of each pyrolysis furnace 2 is fully opened.

In this state, the power generation gas turbine 52 is started, but since the power generation gas turbine 52 starts automatically, manual control cannot be performed until the no-load rated rotation speed is reached after startup, so the exhaust gas is not released into the atmosphere until then. Extract it to the chimney 56.

Next, the induction fan 18 of each pyrolysis furnace 2 is started, and the switching damper 5 with a drive source in the air duct 34 is activated.
4 is slightly opened to allow a small amount of exhaust gas from the power generation gas turbine 52 to flow into each pyrolysis furnace 2.

When exhaust gas begins to flow a little, heating burners (not shown) in each pyrolysis furnace 2 are ignited to gradually raise the temperature inside the furnace.

At this time, the oxygen concentration control by the air flow rate control device 32 is not performed, and the furnace internal pressure of the pyrolysis furnace 2 is controlled by the induction fan 1.
8, the pressure in the air duct 34 is adjusted by the opening degree of the drive source-equipped discharge damper 58 using a pressure regulator (PIC) 60 provided near the gas turbine exhaust gas duct 50, Performs so-called pressure control.

When the temperature inside the furnace reaches a specified value, steam is allowed to flow into the multitubular pyrolysis tube 4 to protect it.

When the temperature of the steam flowing through the multi-tubular pyrolysis tube 4 reaches the pyrolysis temperature, feedstock hydrocarbon such as naphtha is introduced into the tube, but at the latest before the introduction of this hydrocarbon, the supercharger partial drive source Start up 74.

When hydrocarbons are introduced into the multi-tubular pyrolysis tube 4, the load on the pyrolysis furnace 2 increases rapidly, so the pressure inside the air duct 34 should be carefully monitored as the load is increased.

After charging hydrocarbons to each pyrolysis furnace 2, pressure control is switched to oxygen concentration control.

On the other hand, since it is necessary to increase the amount of air supplied as the furnace load increases, the discharge damper 58 with drive source is completely tightened and control of the supercharger partial drive source 74 is started.

When the feeding of hydrocarbons to the pyrolysis furnace 2 is completed and the pyrolysis furnace 2 enters stable operation, the power generation load of the power generation gas turbine 52 is started.

At this time, as the power generation load increases, the temperature of the exhaust gas from the power generation gas turbine 52 increases and the oxygen concentration in the exhaust gas decreases. Continue increasing the load.

In addition, when starting the apparatus, after starting the pyrolysis furnace 2, when starting the power generation gas turbine 52, when starting each of the pyrolysis furnaces 2, the variable air volume blower 38 and the auxiliary blower 40 are driven. The combustion air is supplied only with fresh air.

Next, the switching damper 54 with a drive source in the air duct 34 is closed, and the discharge damper 5 with a drive source in the chimney 56 for releasing into the atmosphere is closed.
After confirming that the discharge damper 58 is open,
Activate.

After this startup, after the power generation gas turbine 52 reaches the rated rotational speed, the switching damper 54 with a drive source in the air duct 34 is gradually opened, and at the same time the discharge damper 58 with a drive source is gradually closed. Go.

At this time, if the pressure inside the air duct 34 increases, the discharge port damper 48 of the auxiliary blower 40 is gradually tightened.

After the discharge port damper 4B is completely tightened, the auxiliary blower 40 is stopped, and the amount of air supplied by the auxiliary blower 40 is switched to the exhaust gas of the power generation gas turbine 52, the power generation gas turbine 52 The power generation load is gradually increased while monitoring the condition of the pyrolysis furnace 2.

In this way, when the pyrolysis furnace 2 and the power generation gas turbine 52 are in a stable operating state and are in a steady operating state, regardless of whether or not they are started, the air flow rate control device 3
2, oxygen flow rate control is performed.

The combustion air flow rate required in the pyrolysis furnace 2 is equal to the theoretical air flow rate for the total amount of fuel gas and fuel oil to the burner provided in the pyrolysis furnace 2.
The required air flow rate is the sum of the air flow rate corresponding to the excess air rate in the exhaust gas, so the air flow rate in the air duct 34 is controlled so that the required air flow rate and the air flow rate in the air duct 34 are equal to each other.

At this time, the air flow rate in the air duct 34 is corrected based on the oxygen concentration, temperature, or pressure in the air.

By the way, coke is deposited in the multi-tubular pyrolysis tube 4 as a result of the pyrolysis reaction of hydrocarbons in the pyrolysis furnace 2, and the efficiency of the pyrolysis furnace 2 decreases over time.

Therefore, a plurality of the pyrolysis furnaces 2 are installed in parallel and switched to operate at regular intervals, thereby continuously operating the entire olefin production apparatus.

When coke is deposited in the shell-and-tube pyrolysis tube 4 in this way, the supply of hydrocarbons as a raw material is stopped, and steam and air are supplied to the shell-and-tube pyrolysis tube 4 to cool the inside of the tube. Since precipitated coke is removed, the heating burner is finally extinguished, and the inside of the furnace is inspected, the required air flow rate of the pyrolysis furnace varies considerably in such a process.

When the required air flow rate decreases due to a partial stoppage of a plurality of pyrolysis furnaces 2, etc., first the supercharger drive source 74 or the inlet guide with drive source is The vane 72 is controlled by a required air flow rate and a temperature sensor (T/C) provided in the air duct 34.
82. Pressure detector (PT) 84, flow rate detector (FT) 8
6 and the indicated value of the acidity concentration detector (0,) 88 and the like.

If adjustment by the supercharger drive source 74 or the drive source input log guide bay 772 is insufficient, tighten the switching damper 54 with the drive source, open the discharge damper 58 with the drive source, and adjust the exhaust gas of the power generation gas turbine 52. The flow of gas into the air duct 34 is stopped, and then the variable air volume blower 38 or the auxiliary blower 40 is driven and controlled by the rotation speed ll1111nvt setting 46.

On the other hand, when starting the pyrolysis furnace 2 from which coke removal has been completed, the air flow rate is increased by the operation opposite to the above, and if the air flow rate is still insufficient, it is covered by the operation of the power generation gas turbine 52 or the like.

Next, the power generation gas turbine 52 or the drive source attendant log guide vane 72 comes to an emergency stop (trip) due to a failure or the like.
In this case, the stoppage of the power generation gas turbine 52 is immediately detected by the trip detection control device 78, and the switching damper 54 with a drive source in the air duct 34 is closed, and the drive source in the chimney 56 for releasing into the atmosphere is closed. The source discharge damper 5B is opened, and the auxiliary blower 40 is started to compensate for the decrease in the amount of supplied air.

At this time, even if the auxiliary blower 40 is started, it takes 10 seconds to complete the start-up of the auxiliary blower drive source 44, so if the pyrolysis furnace 2 is operated with a constant load, there will be a temporary There will be a lack of air.

Therefore, the negative part of the pyrolysis furnace 2 is reduced until the auxiliary blower 40 is fully activated.

According to this embodiment as described above, the high temperature exhaust gas discharged from the power generation gas turbine 52 can be utilized, and the energy efficiency of the pyrolysis apparatus can be greatly improved.

In this case, air is supplied to the power generation gas turbine 52 via the supercharger 66, and the supercharger 66 is driven by a supercharger drive source 74, and air is supplied to the supercharger 66. The amount can be adjusted by the drive source input log guide vane 772, and these drive source inlet guide vanes 72 and supercharger drive source 74 are controlled by the air flow control device 3.
2, even if the temperature of the outside air changes significantly, the exhaust gas discharged from the power generation gas turbine 52 is controlled by the amount of fuel consumed by the pyrolysis furnace 2. It is possible to correspond to the required air flow rate from summer to mountain.

Furthermore, since the variable air volume blower 3B and the auxiliary blower 40 are provided, even if the power generation gas turbine 52 were to stop due to an accident, or the required air flow rate would be such that the exhaust gas of the power generation gas turbine 52 would not be required. In this case, an appropriate air flow rate can be achieved by driving and controlling the variable air volume blower 38 or the auxiliary blower 40.

Furthermore, since the intake vibro 4 is provided with a cooler 68, the suction volume of the power generation gas turbine 52 can be lowered to increase the output air volume.

In addition, in implementation, as a measure against air shortage when the auxiliary blower 40 starts up when the power generation gas turbine 52 trips, the auxiliary blower 40 is always operated with no load, and when the power generation gas turbine 52 trips, the load is rapidly increased. Alternatively, a method of configuring the auxiliary blower 40 by a large number of small ones that can start up quickly is also considered, but since problems such as operating costs and equipment costs arise, in practice there is no method to limit the furnace load. It's advantageous.

Further, if each pyrolysis furnace 2 is equipped with the induction fan 18 as in the embodiment, an emergency suction duct 90 is provided in the air duct 34 as shown by the chain line in the figure, and the emergency suction duct 90 is A damper 92 provided at the power generation gas turbine 90 may be opened to suck static electricity when the power generation gas turbine 52 is tripped.

Furthermore, the number of failed pyrolysis furnaces 2 is not limited to four as shown in the figure;
The number of aircraft may be four or less or four or more.

〔Effect of the invention〕

As described in detail above, according to the present invention, the gas turbine is provided with a supercharger, and the supercharger is configured to be controlled according to fluctuations in the outside air temperature, etc., so that the outside air temperature, etc. It is possible to always stably supply the air required by the pyrolysis furnace to the pyrolysis furnace even when the air changes significantly.

[Brief explanation of drawings]

The figure is a system diagram showing an embodiment of the present invention. 2...Pyrolysis furnace, 6...Oxygen concentration controller, 18...
- Induced fan, 20... Induced fan artificial damper with drive source, 26... Detector, 28... Flow meter, 30...
Air amount correction adjustment needle, 32...Air flow rate control device, 34
...Air duct, 36... Branch duct, 38...
Variable air volume blower, 40... Auxiliary blower, 42... Variable air volume blower drive source, 46... Rotation speed control device, 50
...Exhaust gas duct for gas turbine, 52...Gas turbine for power generation, 54...Switching damper with drive source, 58
...Release damper with drive source, 60...Pressure regulator (P
TG), 62...Pressure control device, 64...Intake pipe, 66...Supercharger, 68...Cooler, 70...
Intake duct, 72...Inlet guide vane with drive source, 7
4...Supercharger drive source, 78...Trip detection control device, 82...Temperature detector (T/C), 84...Pressure detector (PT), 86...Flow rate detector (FT), 88
...Acidity concentration detector (0□).

Claims (4)

[Claims] (1) Multiple pyrolysis furnaces with built-in hydrocarbon pyrolysis tubes are installed in parallel, and variable air volume blowers and gas turbines are installed in parallel to supply combustion air to these pyrolysis furnaces. A discharge port and an exhaust port of the gas turbine are respectively connected to air ducts leading to each pyrolysis furnace, and a supercharger is connected to the intake port of the gas turbine, and the air flow rate in the air duct is adjusted to match the pyrolysis furnace. A hydrocarbon pyrolysis apparatus comprising an air flow rate control device that controls either or both of the supercharger and the blower so as to match the air flow rate calculated from the fuel consumption of the furnace. . (2) In claim 1, the air flow rate control device may control the supercharger or control the amount of air blown.
A hydrocarbon pyrolysis device characterized in that it is configured to preferentially control a supercharger. (3) In claim 1, a cooling means is provided between the supercharger and the intake port of the gas turbine for cooling the air supplied from the supercharger to the intake port of the gas turbine. A hydrocarbon thermal decomposition device characterized by: (4) In claim 1, the supercharger:
An inlet guide vane is provided at the air intake, and the air flow rate control device is configured to control either or both of the inlet guide vane or a supercharger drive source that drives the supercharger. 1. A hydrocarbon pyrolysis device characterized by comprising: