JPH09110401A - Control method of hydrogen producing equipment and device therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain hydrogen of high purity by performing feedforward control of the flow rate of hydrocarbon for hydrodesulfurization and the flow rate of hydrocarbon for reforming in two stages to control the pressure of gaseous hydrogen to a prescribed value. SOLUTION: Sulfur in hydrocarbon feedstock is converted into H2 S by a hydrogenation reactor 2, and the H2 S is removed by a sulfur adsorption reactor 3 to turn the hydrocarbon into desulfurized hydrocarbon, and it is turned into reformed gas by steam in a reforming reactor 4 to form hydrogen by a CO shift reactor 5, and components other than gaseous hydrogen are absorbed and desorbed by a pressure swing adsorption/desorption device 6 and removed and discharged, to obtain gaseous hydrogen of high purity. A control signal for combining pressure displacement calculated by a hydrogen pressure controller PC1 with a time lag factor from a control system arithmetic unit 7 to which the flow rate value is inputted is sent to a flow controller FC1 to automatically change an operation load according to the quantity of gaseous hydrogen, allowing the flow rate of hydrocarbon for reforming to be controlled. Similarly, the flow rate of hydrocarbon for hydrodesulfurization is automatically controlled, and feedforward control is performed together to keep the pressure of gaseous hydrogen product constant.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for controlling a hydrogen production apparatus and the apparatus therefor, and more specifically, to keep the product hydrogen pressure at a predetermined value even when the demand for hydrogen gas fluctuates.
Adjusting the amount of feedstock hydrocarbons supplied to the equipment in two stages: the flow rate of hydrodesulfurization hydrocarbons used for hydrodesulfurization and the amount of reforming hydrocarbons used for steam reforming reaction after hydrodesulfurization The present invention relates to a method for controlling a hydrogen production device and a device for performing feedforward control of a product hydrogen gas pressure to a predetermined value.

[0002]

2. Description of the Related Art Conventionally, there has been well known a method of steam-reforming hydrogen gas using hydrocarbons such as naphtha, C4 fraction hydrocarbon, and recovered gas as raw materials to produce hydrogen. This hydrogen production method is mainly used for hydrogen purification such as hydrodesulfurization process of raw material hydrocarbons, steam reforming process of desulfurized and refined hydrocarbons, CO shift process of reformed gas, methanation process and decarbonation process. It is carried out by using a hydrogen production device composed of steps, and normally, product hydrogen gas is supplied in accordance with the demands of customers of various plants using hydrogen such as an oil refining plant. In this case, the required amount of hydrogen gas at the demand destination is relatively variable, and the valve of the flow path of the hydrogen gas is opened / closed according to the variation, so that the pressure on the outflow side of the hydrogen production device increases or decreases. On the other hand, it is necessary to keep the pressure of the product hydrogen gas constant for the following reasons. That is, if the product hydrogen gas pressure is left to fluctuate as it is, it adversely affects the hydrogen partial pressure in the hydrotreating device or hydrocracking device of the customer, which also affects the reactivity, which is not preferable. . Also, in refineries and chemical plants, hydrogen gas is used in various devices and has a strong character as a utility, but if the pressure of the product hydrogen gas changes due to load fluctuations in each device, such as in factories, etc. It is not preferable because it may affect the overall operation. Further, the hydrogen gas supplied to the demand destination is generally carried out by using a compressor, and the feed pressure is usually constant, and the pressure fluctuation is not preferable.

Therefore, in the hydrogen production apparatus, conventionally, the supply amount of the raw material hydrocarbons has been manually adjusted to cope with the fluctuation of the hydrogen consumption amount of the demand destination. On the other hand, hydrogen production equipment installed in various plants is generally large in size, and after increasing or decreasing the feedstock hydrocarbons due to fluctuations in the amount of hydrogen at the demand destination, the increase or decrease will become apparent as a change in the amount of hydrogen in the product. It is essential that there be a time delay. Previously, this time lag was dealt with by predicting the fluctuation range of hydrogen consumption at the demand destination, constantly producing the maximum amount of hydrogen, and discharging surplus hydrogen to the outside. After that, as described in, for example, Japanese Patent Laid-Open No. 63-55102, fluctuations in the amount of hydrogen consumed at the demand destination are detected as fluctuations in the hydrogen pressure flowing out of the manufacturing apparatus, and dead time compensation is incorporated. A bleed hydrogen minimization method has been proposed in which the amount of released hydrogen is controlled to a minimum by adjusting the flow rate of the raw material to the reforming furnace. In this bleed hydrogen minimization control method, since the reforming hydrocarbon flow rate to the reforming reactor fluctuates greatly, the steam / carbon (S / C) ratio corresponds to the fluctuation of the reforming hydrocarbon flow rate. The steam amount to the reforming reactor is manually adjusted and controlled so that it remains constant, and the fuel flow rate is manually adjusted so that the outlet temperature of the reforming reactor is maintained at a constant design value. It is controlled, and in JP-A-60-90802, it has been proposed to control these with a computer. Further, Japanese Patent Application Laid-Open No. 7-206401 proposes a control system for a hydrogen production device that adjusts the temperature on the outlet side of the reformer by computer control with delay time compensation in order to maintain the hydrogen purity at a predetermined value. Has been done.

[0004]

In the above bleed hydrogen minimization control method, useless hydrogen gas production can be suppressed as much as possible compared with the conventional excess hydrogen release method, and most of the hydrogen production apparatuses currently in operation. Can basically be said to have adopted this method. However, even if it is a small amount, it is not preferable to constantly release the product hydrogen gas to the outside because it lowers the productivity. Further, in particular, in recent years, as a step for removing impurities in crude hydrogen gas, a pressure swing adsorption / desorption method (PSA) has been adopted instead of a decarbonation step by a conventional chemical absorption method,
Product hydrogen gas is being converted into a process that is discharged through the PSA process. In this PSA method, impurity gases such as methane, CO, carbon dioxide gas, and steam in crude hydrogen gas are physically adsorbed and separated by the difference between the crude hydrogen gas pressure and the discharged impurity gas pressure. When the pressure fluctuates, particularly when the hydrogen gas pressure decreases, the PSA separation performance such as hydrogen recovery rate and product hydrogen purity will be affected. Therefore, in the hydrogen production equipment that adopts the PSA method for refining the product hydrogen gas, the outflow pressure of the hydrogen gas must be controlled more strictly than in the conventional hydrogen gas refining method of the chemical absorption decarboxylation treatment, and the demand side It is necessary to maintain the hydrogen gas pressure on the outflow side at a predetermined value without fluctuating due to fluctuations in the hydrogen required amount, and even if fluctuations in hydrogen gas consumption occur on the demand side, the hydrogen gas flowing out from the hydrogen production equipment It is desirable to control the flow rate of the hydrogen gas so that the outflowing hydrogen gas pressure does not fluctuate and the hydrogen gas loss is zero during normal operation.

The present invention provides a control method and an apparatus for controlling the outflow hydrogen gas pressure in a hydrogen production apparatus adopting the PSA method for removing impurities in the above hydrogen purification to a predetermined value and releasing the hydrogen gas to zero. With the goal. The inventors of the present invention have various types of hydrogen gas flow rate in the hydrogen production process operation, desulfurization reforming hydrocarbon flow rate to be supplied to the reforming reactor, feed hydrocarbon flow rate to be supplied to the hydrogen production apparatus, etc. The present invention has been completed as a result of earnestly studying the manipulated variables.

[0006]

According to the present invention, a hydrodesulfurization step for hydrogenating and removing a sulfur content from a raw material hydrocarbon by adsorption, and a steam reforming reaction step for steam-reforming desulfurized hydrocarbons In a hydrogen production device having a reforming gas shift reaction step, and a pressure swing adsorption / desorption step of adsorbing and separating impurities in the reforming gas to purify hydrogen gas,
(1) The pressure of the hydrogen gas to be produced is set to a predetermined value in advance, and it is based on the displacement between the pressure detected on the outlet side of the hydrogen producing device and the preset hydrogen gas pressure set, and the produced hydrogen gas flow rate. The flow rate of the reforming hydrocarbons introduced into the steam reforming reaction step is adjusted by the delay time compensation element,
Feed-forward control of the hydrogen gas pressure to a predetermined value and (2) the upstream pressure for adjusting the flow rate of the reforming hydrocarbons introduced into the steam reforming reaction step is set to a predetermined value in advance, and the upstream pressure is set. Introduced into the hydrodesulfurization step by the displacement between the pressure detected in step 1 and the preset predetermined upstream pressure and a delay time compensation element based on the flow rate of the reforming hydrocarbons supplied to the steam reforming reaction step. By adjusting the flow rate of the raw material hydrocarbons and feed-forward controlling the upstream pressure to a predetermined value, the product hydrogen pressure is controlled to a predetermined value without releasing hydrogen to the outside of the system. A control method is provided. In the method for controlling a hydrogen production apparatus according to the present invention, the delay time compensation element based on the hydrogen gas flow rate is calculated from a signal of the product hydrogen gas flow rate, and the delay time compensation based on the flow rate of the reforming hydrocarbons is performed. Preferably, the element is one that is calculated from the reforming hydrocarbon flow rate signal.

The present invention also relates to a hydrodesulfurization reactor for hydrogenating and removing a sulfur content from raw hydrocarbons by adsorption, a steam reforming reactor for steam reforming desulfurized hydrocarbons,
A shift reactor for reformed gas, a pressure swing adsorption / desorption device for producing high-purity hydrogen gas by adsorbing and separating impurities in the reformed gas for purification, and desorption / desorption. (1) The steam reforming reactor, the reforming gas shift reactor, and the pressure swing adsorption / desorption device are sequentially connected by a distribution line, and the reforming hydrocarbon and steam supply line are connected to the steam reforming reactor. The hydrogen gas outflow line and the adsorbed gas exhaust line are installed in the pressure swing adsorption / desorption device, and the hydrogen gas pressure regulator and the hydrogen gas flow rate measuring device are arranged in the hydrogen gas outflow line for reforming. A reforming hydrocarbon amount controller is arranged in the hydrocarbon supply line, and a signal line from the hydrogen gas flow rate measuring device to the calculator, a signal line from the calculator to the hydrogen gas pressure controller, and Signal lines from the hydrogen gas pressure controller to the reforming hydrocarbon amount controller are respectively provided, and the delay time element signal calculated based on the signal from the hydrogen gas flow rate measuring device by the calculator is The reforming carbonization is sent to the hydrogen gas pressure regulator and is added to the hydrogen gas pressure displacement between the hydrogen gas outflow pressure measurement value and the hydrogen gas pressure set value calculated by the hydrogen gas pressure regulator and used as a flow rate control signal. A feed-forward control system for the hydrogen gas pressure sent to the hydrogen amount regulator, and (2) a hydrodesulfurization reactor is provided with a feed hydrocarbon feed line and a desulfurized hydrocarbon outflow line, and the desulfurized hydrocarbon outflow line And the reforming hydrocarbon supply line are connected to each other, a raw hydrocarbon flow rate controller is arranged in the raw hydrocarbon supply line, and desulfurized hydrocarbon water is provided in the desulfurized hydrocarbon outflow line. A pressure controller is disposed, a signal line from the reforming hydrocarbon amount controller to the computing unit, a signal line from the computing unit to the desulfurized hydrocarbon pressure controller, and the desulfurized hydrocarbon pressure controller to the signal line. Signal lines to the feedstock hydrocarbon flow rate controller are respectively provided, and the delay time element signal calculated by the calculator based on the signal from the reforming hydrocarbon amount controller is supplied to the desulfurized hydrocarbon pressure controller. The raw hydrocarbon flow rate controller, which is sent and is added to the desulfurized hydrocarbon pressure displacement between the desulfurized hydrocarbon outflow pressure measurement value and the desulfurized hydrocarbon pressure set value calculated in the desulfurized hydrocarbon pressure controller as a flow rate control signal. And a feedforward control system for the reforming hydrocarbon pressure to be sent to the reactor. In the method for controlling a hydrogen production apparatus and the apparatus thereof according to the present invention, it is preferable that the hydrodesulfurization step includes a hydrogenation reaction step and a hydrogen sulfide content chemisorption step. In the present invention, the delay time element means a delay,
It includes a parameter including three elements of gain and dead time.

The control of the hydrogen production apparatus of the present invention is configured as described above, and the flow rate of the raw material hydrocarbons supplied to the hydrodesulfurization apparatus of the hydrogen production apparatus and the reforming carbonization supplied to the reforming reactor. The flow rate of hydrogens is rapidly adjusted to meet the fluctuation of the demanded hydrogen gas demand. Therefore, the pressure of the hydrogen gas flowing out from the PSA process of the hydrogen production device, which immediately fluctuates in response to the fluctuation of the required amount of hydrogen gas, is measured, and the displacement between the predetermined set pressure value and the measured value is measured as the raw hydrocarbons. The flow rate of the reforming hydrocarbons after hydrodesulfurization supplied to the reforming reactor is adjusted so as to be reflected in the supply amount. In addition, the flow rate of the raw material hydrocarbons supplied to the hydrodesulfurization process that is linked to the outflow amount of the reforming hydrocarbons, and the pressure of the hydrodesulfurization hydrocarbons that flow out from the hydrodesulfurization process are measured. The flow rate of the raw material hydrocarbons is adjusted by the displacement between the gas pressure of the hydrodesulfurization step and the measured value set in advance. At the same time, the results of calculating the delay time elements consisting of the delay based on the product hydrogen gas flow rate and the desulfurized hydrocarbon flow rate, the gain, and the dead time as the parameters of the feedforward control in the control calculators are used together with the above-mentioned pressure displacements for the raw material carbonization. The flow rate of hydrogens and the flow rate of reforming hydrocarbons are adjusted respectively. In this way, by adjusting the flow rate of the raw material hydrocarbons, the product hydrogen gas pressure can be controlled by quickly following the fluctuation in the required amount of the product hydrogen gas at the demand destination.

Further, the control of the present invention controls the hydrogen gas pressure to a predetermined value by feed-forward control in two stages of the hydrodesulfurization process and the steam reforming reaction process. The controllability is improved, and for example, even if the operating load fluctuation that was difficult to control in the past is small and the delay time element in the control system is very large, it becomes possible to control and the fluctuation of the required hydrogen gas demand Can be controlled in a reliable manner. That is, the flow rate of the raw material hydrocarbons introduced into the apparatus is changed in two steps from the direction close to the outflow of hydrogen gas, and the operating load fluctuation in the apparatus is linked with the product hydrogen gas flow rate and the reforming reactor inlet raw material flow rate. Since the rapid adjustment is made according to the parameters, the outflow hydrogen gas pressure can be easily controlled to a predetermined value. Further, since the control can be performed reliably and accurately, the hydrogen bleeding as in the conventional case is not necessary at all, except in the case of a large and drastic demand change such as the start-up and shutdown of the device.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in more detail with reference to the drawings. However, the present invention is not limited to the embodiments described below. FIG. 1 is a schematic explanatory diagram showing the configuration of an embodiment of a method for controlling a hydrogen production apparatus of the present invention and the apparatus. In FIG. 1, the recovered gas and the raw material hydrocarbons containing naphtha or butane as a main component are fed from the raw material hydrocarbons supply section 1 through a heating line (not shown) through a distribution line L1 to a hydrogenation reactor 2 in a desulfurization section. Is flowed into. In the hydrogenation reactor 2, raw material hydrocarbons are converted into hydrogen sulfide by converting the contained sulfur into hydrogen sulfide and subsequently flowing into the sulfur content adsorption reactor 3 to remove hydrogen sulfide and become hydrogenated desulfurized hydrocarbons. The hydrodesulfurized hydrocarbons are further distributed in the distribution line L2.
Through the distribution line L3 as reforming hydrocarbons,
It flows into the reforming reactor 4 together with a predetermined amount of steam from the distribution line L4. In the steam reforming reactor 4, the desulfurized raw material hydrocarbons are heated to a predetermined temperature and steam-reformed to generate a reformed gas containing hydrogen. The reformed gas generated in the steam reforming reactor 4 flows into the CO shift reactor 5 through the distribution line L5 and hydrogen is continuously generated. The hydrogen-containing shift gas flowing out from the CO shift reactor 5 flows into the PSA device 6 for impurity treatment through the distribution line L6, and hydrogen gas in the gas is not adsorbed, but adsorbed methane, CO, carbon dioxide gas. Impurity gas such as steam is sequentially desorbed, discharged from the distribution line L8, and sent as fuel for a heating furnace (not shown) of the steam reforming reactor. On the other hand, hydrogen gas not adsorbed is about 9
High-purity hydrogen gas of 9.9% or more is sent to the demand destination through the distribution line L7 at a predetermined pressure.

A control system of the outflowing hydrogen gas pressure when the hydrogen consumption amount at the demand destination fluctuates from the state in which the hydrogen production apparatus is operated in a predetermined steady state will be described. That is, the control of the outflowing hydrogen gas pressure from the PSA device 6 will be described by adjusting the flow rates of the reforming hydrocarbons and the raw material hydrocarbons in response to the fluctuations of the demanded hydrogen gas amount during the steady state operation. . In FIG. 1, a hydrogen pressure controller PC1 that communicates with a distribution line L7 that sends hydrogen gas from a PSA device 6 to a customer has a measured value of hydrogen gas pressure flowing out of the PSA device and a predetermined set pressure value during steady operation. Calculate the displacement of. On the other hand, the flow rate detector FI arranged on the distribution line L7 detects the flow rate of the hydrogen gas flowing out from the PSA device, and the signal of the hydrogen gas flow rate detection value is sent to the signal line SL1.
Is sent to the control system calculator 7 to calculate an operation load value according to the detected hydrogen gas flow rate, and an operation setting parameter signal composed of a delay time element based on the calculated operation load value is sent to the signal line SL2.
To the hydrogen pressure controller PC1. In this case, for example,
The control system calculator 7 inputs and holds a delay time element consisting of a gain corresponding to each operating load value, a dead time and a delay at a predetermined interval from 0% to 100% of the operating load as a setting parameter of the feedforward control. , The detected hydrogen gas flow rate value can be calculated by calculating the operating load percentage at the design flow rate of the device and incorporating it in advance so that the operating parameter is automatically changed to the set parameter and the operating operation is continued. . Therefore, hydrogen pressure controller PC
A control signal obtained by combining the pressure displacement calculated in 1 with the delay time element is sent to the flow rate controller FC1 arranged in the distribution line L3 into which the reforming hydrocarbons flow in via the signal line SL3, and the customer needs it. The parameter of the operating load is automatically changed to match the amount of hydrogen gas, and the flow rate of the reforming hydrocarbons is adjusted.

Further, the flow rate of the raw material hydrocarbons supplied to the hydrodesulfurization step is also the flow rate detector FC arranged in L3.
1, the signal of the flow rate detection value of the hydrodesulfurized hydrocarbon is sent to the control system calculator 7 through the signal line SL4 to calculate the operation load value according to the detected hydrodesulfurized hydrocarbon flow rate,
A hydrodesulfurized hydrocarbon pressure controller PC for connecting an operation setting parameter signal based on the delay time element to a distribution line L2 for hydrodesulfurized hydrocarbons via a signal line SL5.
Send to 2. The hydrodesulfurized hydrocarbon pressure controller PC2 calculates the displacement between the measured value of the hydrodesulfurized hydrocarbon pressure flowing out from the adsorption reactor 3 and a predetermined set pressure value during steady operation, and further,
It is automatically placed in the distribution line L1 into which the feedstock hydrocarbons flow in via the signal line SL6 by combining with the operation parameter signal sent through the signal line SL5 after being automatically changed to the operating parameter of the operating load corresponding to the outflowing hydrogen gas amount. The flow rate of the raw material hydrocarbons is adjusted by automatically changing the setting parameter of the operating load corresponding to the required amount of hydrogen gas at the demand destination to the flow rate controller FC2. As described above, in the hydrogen production device of the present invention, the flow rate of the reforming hydrocarbons supplied to the reforming reactor 4 is adjusted, and the flow rate of the raw material hydrocarbons to the hydrodesulfurization reactor 2 is adjusted. The pressure and flow rate of the hydrogen gas flowing out from the hydrogen production device to the customer are measured, and the flow rate of the hydrocarbons is divided into two stages from the delay time element based on the hydrogen gas flow rate due to the displacement with the preset pressure predetermined value. Can be rapidly adjusted to finally feedforward control the hydrogen gas pressure from the PSA device 6 to a predetermined value. It should be noted that it is the same as in a general large-scale chemical device that a discharge pressure relief valve (not shown) is provided to respond to the start or stop of operation, an emergency, or the like.

According to the control system of the hydrogen production apparatus of the present invention, when the hydrogen gas demand on the demand side fluctuates and the product hydrogen gas pressure tends to decrease or increase, the amount of hydrogen outflow is changed as described above. Feed-forward control of the quality hydrocarbon flow rate and the desulfurization feedstock hydrocarbon flowrate, especially by controlling in two stages, the hydrogen production equipment automatically increases or decreases the feedstock hydrocarbon feed rate, and the product hydrogen gas pressure Can be held constant. As a result, the operation of the PSA device for purifying the crude hydrogen gas is stable, and the adsorption / desorption performance such as the hydrogen recovery rate can be maximized, which is effective. In particular, since the feedforward control is performed in two stages as described above depending on the amount of outflowing hydrogen, compared to the conventional one-stage control, the hydrogen gas pressure is controlled to a predetermined level according to most of the fluctuations in the demand destination. Yes, there is no need to schedule the release of hydrogen gas. As a result, the loss of hydrogen gas can be always zero except in an emergency. As a result, the raw material hydrocarbons and fuels for hydrogen production can be reduced, the waste of global resources can be prevented, and the effects on air pollution and global pollution can be reduced, which is favorable for the global environment. Also,
When the control system of the hydrogen production apparatus is small, both the reforming hydrocarbon flow rate and the desulfurization raw material hydrocarbon flow rate can be feedforward controlled based on the outflowing hydrogen amount.

[0014]

The method and apparatus for controlling a hydrogen production device of the present invention can automatically and quickly control the product hydrogen gas pressure to a predetermined value in response to fluctuations in the product hydrogen gas consumption. Therefore, unlike the conventional bleed hydrogen minimization control method that controls the excess release hydrogen amount of the production hydrogen amount set to a large amount, it is not necessary to schedule the release of a small amount of hydrogen in the normal steady operation. Further, according to the present invention, since the outflow hydrogen gas pressure can be controlled and maintained at a predetermined value at all times, the pressure swing adsorption / desorption method can be incorporated into the manufacturing apparatus for stable operation, and the performance of hydrogen purification can be improved. It is possible to purify hydrogen gas and stably produce 99.9% or more high-purity hydrogen gas with stable hydrogen purification performance and a high recovery rate.

[Brief description of the drawings]

FIG. 1 is a schematic explanatory diagram showing a configuration of an embodiment of the present invention.

[Explanation of symbols]

1 raw material hydrocarbons supply part 2 hydrogenation reactor 3 sulfur content adsorption reactor 4 steam reforming reactor 5 CO shift reactor 6 PSA device 7 control system calculator PC1 hydrogen pressure controller PC2 hydrodesulfurization hydrocarbon pressure control Meter FI Flow rate detector FC1, FC2 Flow rate control meter L1, L2, L3, L4, L5, L6, L7, L8 Distribution line SL1, SL2, SL3, SL4, SL5, SL6 Signal line

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Fumiaki Mimatsu 2-12-1, Tsurumi Chuo, Tsurumi-ku, Yokohama-shi, Kanagawa Chiyoda Kako Construction Co., Ltd. (72) Inventor Takeshi Nakajima Tsurumi-chuo, Tsurumi-ku, Yokohama-shi, Kanagawa 2-12-1 Chiyoda Kakoh Construction Co., Ltd. (72) Inventor Takaya Ohne 2-12-1 Tsurumi Chuo, Tsurumi-ku, Yokohama-shi, Kanagawa Chiyoda Kakoh Construction Co., Ltd.

Claims (5)

[Claims] 1. A hydrodesulfurization step of hydrogenating and removing a sulfur content from raw material hydrocarbons by adsorption, a steam reforming reaction step of steam reforming desulfurized hydrocarbons, a reforming gas shift reaction step, and In a hydrogen production apparatus having a pressure swing adsorption / desorption step of adsorbing and separating impurities in a reformed gas to purify hydrogen gas, (1) the pressure of the produced hydrogen gas is set to a predetermined value in advance, and the hydrogen production is performed. Displacement of the pressure detected at the outlet side of the device and the preset hydrogen gas pressure set,
The flow rate of the reforming hydrocarbons introduced into the steam reforming reaction step is adjusted by the delay time compensating element based on the produced hydrogen gas flow rate, and the hydrogen gas pressure is feedforward controlled to a predetermined value, and (2 ) The upstream pressure for adjusting the flow rate of the reforming hydrocarbons to be introduced into the steam reforming reaction step is set to a predetermined value in advance, and the displacement between the pressure detected by the upstream pressure and the set predetermined upstream pressure is set. And the delay time compensating element based on the flow rate of the reforming hydrocarbons supplied to the steam reforming reaction step, the flow rate of the raw material hydrocarbons to be introduced into the hydrodesulfurization step is adjusted, and the upstream pressure is set to a predetermined value. A method for controlling a hydrogen production apparatus, wherein the product hydrogen pressure or flow rate is controlled to a predetermined value by performing feedforward control to a value without releasing hydrogen to the outside of the system. 2. A delay time compensation element based on the hydrogen gas flow rate is calculated from a product hydrogen gas flow rate signal, and
The method for controlling a hydrogen production apparatus according to claim 1, wherein the delay time compensation element based on the flow rate of the reforming hydrocarbons is calculated from a signal of the reforming hydrocarbon flow rate. 3. The method for controlling a hydrogen production apparatus according to claim 1, wherein the hydrodesulfurization step includes a hydrogenation reaction step and a hydrogen sulfide content chemical adsorption step. 4. A hydrodesulfurization reactor for adsorbing and removing a sulfur content from raw material hydrocarbons by adsorption, a steam reforming reactor for steam reforming desulfurized hydrocarbons, a reforming gas shift reactor, A hydrogen production apparatus having a pressure swing adsorption / desorption device for adsorbing and separating impurities in a reformed gas to purify hydrogen gas, and a control computing unit, comprising: (1) a steam reforming reactor and a shift reaction of a reformed gas. The reactor and the pressure swing adsorption / desorption device are sequentially connected by a distribution line, the reforming hydrocarbon and steam supply line are installed in the steam reforming reactor, and the pressure swing adsorption / desorption device is equipped with a hydrogen gas outflow line and adsorption. A gas discharge line is provided, a hydrogen gas pressure controller and a hydrogen gas flow rate measuring device are arranged in the hydrogen gas outflow line, and a reforming hydrocarbon amount controller is arranged in the reforming hydrocarbon supply line. A signal line from the hydrogen gas flow rate measuring device to the computing device, a signal line from the computing device to the hydrogen gas pressure regulator, and the hydrogen gas pressure regulator to the reforming hydrocarbon amount regulator. Each signal line is provided, and the delay time element signal calculated by the calculator based on the signal from the hydrogen gas flow rate measuring device is sent to the hydrogen gas pressure controller and calculated by the hydrogen gas pressure controller. Hydrogen gas outflow pressure measured value and hydrogen gas pressure set value are added to the hydrogen gas pressure displacement and sent to the reforming hydrocarbon amount controller as a flow rate control signal, and a feedforward control system of the hydrogen gas pressure, and ( 2) A raw material hydrocarbon supply line and a desulfurized hydrocarbon outflow line are provided in the hydrodesulfurization reactor, and the desulfurized hydrocarbon outflow line and the reforming hydrocarbon supply line are connected to each other, A raw hydrocarbon flow rate controller is arranged in the raw hydrocarbon supply line, a desulfurized hydrocarbon pressure controller is arranged in the desulfurized hydrocarbon outflow line, and a desulfurized hydrocarbon pressure controller is provided from the reforming hydrocarbon amount controller to the arithmetic unit. A signal line, a signal line from the computing unit to the desulfurized hydrocarbon pressure controller, and a signal line from the desulfurized hydrocarbon pressure controller to the raw hydrocarbon flow rate controller are respectively provided, and in the computing unit, The delay time element signal calculated based on the signal from the quality hydrocarbon amount controller is sent to the desulfurized hydrocarbon pressure controller, and the desulfurized hydrocarbon outflow pressure measurement value calculated in the desulfurized hydrocarbon pressure controller and A feedforward control system for the reforming hydrocarbon pressure which is added to the desulfurized hydrocarbon pressure set value and desulfurized hydrocarbon pressure displacement and is sent to the raw hydrocarbon flow rate controller as a flow rate control signal. Controller of the hydrogen production apparatus characterized by. 5. The hydrogen production apparatus control device according to claim 4, wherein the hydrodesulfurization reactor comprises a hydrogenation reactor and a hydrogen sulfide content chemisorption reactor.