JPS61239567A - Power generation method by fuel cell - Google Patents

Abstract

PURPOSE:To make installation of a storage tank and security of its site to be unnecessary, abridge facilities for transmitting power to the spot, and enable the existing pipe line to be utilized, by using a pipe line as buffer tank to generate electric power at a consumption place. CONSTITUTION:Gas fuel produced e.g., in a coal gas furnace 1 is supplied into fuel cells 3, which are installed at an electric power consumption place or the like, via a pipe line 2 laid underground. The coal gas furnace 1 is operated under the maximum load condition of 100% at the peak time P of electric power consumption, and on the other hand the coal gas furnace 1 is operated under the minimum load condition of 20% at the other time not having electric power generation by the fuel cells so that the gas fuel produced during this time can be stored to be supplied at the peak time of electric power consumption with the gas produced under the maximum load condition being combined. Hence, the pipe line 2 itself is enabled to serve as buffer tank for extra gas fuel produced under the minimum load condition.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a method of generating electricity using a fuel cell.

[Prior Art] In recent years, the supply of electric power has been reduced to 14% by nuclear power, 2% by thermal power, and about 7% by hydropower, and nuclear power redundancy is increasing. However, nuclear power generation operates at almost constant output1.
However, it is problematic that the installed capacity is 3% of the total power generation equipment capacity, which is the minimum required amount of electric power. Therefore, there is no need to rely on other power generation sources to meet the peak demand for electricity depending on the time and season. . o7oah, 1ya7□1. 7. . . 7) □1. The firepower is 50~
J-Unit is operated at 100%, while hydropower is operated at 0 to 100% (dedicated to the beak route), and the load changes are applied to cope with fluctuations in the amount of electricity required.

[Problem to be solved by the invention 1,
1 However, it is certain that the supply of LN'G for thermal power generation, which is currently the main source of power generation (11), will become unstable in a short period of several decades, and the Check various power generation methods 1
It is. As this method, reserves have increased in recent years.
・As a method of effectively utilizing the abundant coal, we have developed a combustion system that generates electricity through an electrochemical reaction of gas fuel (+-12, CO), which is made from coal. are collecting. However, this type of battery is also required to function as a peak load battery. but,
(coal) 2) Combine the sulfurizing furnace at the maximum load of the fuel cell!
It is uneconomical to install a separate coal gasifier, and when the amount of electricity needed is low, the coal gasifier is operated at a reduced capacity, and the gas generated at that time is stored and supplied when needed. In order to do so, storage tanks and the like would be required, but there would be problems with the maintenance of the site where they would be installed and the cost of construction.

The present invention was made in view of the above-mentioned problems, and it is possible to connect the nozzle gas generated in a coal gasifier to a power consumption area via a pipeline buried underground. Moe')1
Generate power consumption by transporting it to batteries,
The purpose of this invention is to increase the amount of power generated by the 4' fuel cell during peak power demand by using the pipeline as a buffer tank.

Means for Solving Problem 1] The present invention attempts to solve the above technical problem, and
The gas fuel generated in the coal gasification furnace is transported via underground pipelines to the energy battery installed in the consumption area. The coal gasifier is operated at a low load during non-peak hours (Jl, coal), and the raw material is stored in the vibration line, and the coal gasifier is operated at maximum power during peak power hours. This invention relates to a power generation method using a fuel cell, characterized in that the fuel cell generates power using the valve body gas during load operation and the gas stored in the pipeline.

[Function] Therefore, with the present invention (jl, the pipeline is used as a baranoa tank), it becomes unnecessary to install a storage tank and maintain the site for it, and moreover, electricity is generated at the consumption area. Since it is designed to be connected to C5, it is possible to eliminate the need for expensive power transmission equipment, and it is also possible to use the existing vibe line.

[Example] Embodiments of the present invention will be described below with reference to the drawings.

Figure 1 shows that when operating at 100% maximum load, the fuel cell
This is a schematic diagram showing how to operate a coal gasifier that can produce gas fuel in an amount that can generate electricity for 2000 hours.
- For example, power generation using one combustible battery is required for about 6 hours during the peak power period P, and for the other 1 day.
Nuclear power is sufficient for 8 hours, so fuel cell power generation is not necessary. Therefore, in such a case, it is conceivable to operate the coal gasifier at 100% only during the peak power period P, and stop the operation at other times. However, from the viewpoint of stable operation, it is not suitable for coal gasifiers to start and stop frequently.

The coal gasifier is operated at the maximum load of 100% during the peak power period P, and the coal gasifier is operated at the minimum load of 20% during other times when the fuel cell is not generating power. The gas fuel produced at that time is stored, and the gas produced under the maximum load condition and the stored fuel are combined and supplied to the fuel cell during peak electricity demand. Even if the installed capacity of the coal gasification furnace is set to be equivalent to 50 OMW of electric power switching valve, even the installed capacity of the fuel-O'11 battery can be increased to generate 80 ONW of electricity. A shaded area X in the figure indicates an increase in power.

But said minimum load? In order to store the gaseous fuel produced during operation in the 0% state, a very large capacity and number of storage tanks are required as described above.

To this end, the present invention aims to send the gas fuel produced by the coal gasification furnace to the power consumption area via an existing or newly constructed pipeline buried underground, and to install the gas fuel in the power consumption area. The I-fuel cell is used to generate power shortages at peak times at the consumption area.

Figure 2.3 shows an example of this, in which gas fuel produced in a coal gasifier 1 is supplied to a fuel cell 3 installed in an electric power consumption area via a pipeline 2 buried underground. I try to do that.

Is 4 in the diagram a pipeline? 5 is a storage tank for safety, and 6 is a valve cover.

According to the coincidence mentioned above, pipeline? It can itself be used as a buffer tank for excess gas (yH\"I) produced under the lowest load condition.

Next, “-” pipe line? The storage of gas fuel by itself will be specifically explained.

As shown in Fig. 1 above, taking as an example a coal-gas hedge that can produce the gas fuel necessary to generate 500 N II+ power, the gas generated at maximum load is @51oo.
is 3100 = 300 mowing 0"N...3/h, so the amount of gas generated S2o at 20% load is 820 = 300
X 103X 0.2 = 60
V=60X10'X18=1080X10''l
It becomes t1m'.

Next, a case will be explained in which the above-mentioned gas fuel is transported and stored using commonly used high-density main line piping (10.about.70 kg/cnl') to 600 kg.

Let 1 coin in the pipe be 7 Kv, -' cut2,
::! 0kiJ / C11l' (7) When transported under pressure and covered, it is stored in the pipe);
21°V = 0.27 Lx (30-7) = 6.21
l flJm3”+4. Therefore, 1080x1
It would take 174km to store 0"l.

In addition, in -, of course, the length of the piping can be shortened by increasing the diameter of the piping, laying the piping in multiple lines, or increasing the transport pressure. . Also, is it okay to install 711 of the above piping? Since the number of existing high pressure φ♀ piping is increasing, it is also possible to reuse it, and in that case, it is possible to install it to the power consumption area. The installation of power transmission equipment can be omitted.

FIG. 4 shows another example of the present invention. Conventionally, in a general electric railway network, power is supplied every required distance (approximately 5 km); A pipeline? The figure shows a case in which power is supplied by fuel cells 3 provided at required distances.

It goes without saying that the generated gas can be stored while generating low power generation with the fuel cell at times other than peak load times, and that gases other than the gas produced in the coal-gas hedge can also be used in the same way.

[Effects of the Invention] As described above, according to the power generation method using a fuel cell of the present invention, gas fuel generated in a coal-gas hedge is transferred to a power consumption area via a pipeline buried underground. The electricity is generated at the consumption area while using the pipeline as a batza tank.
(A), the power transmission equipment MV to the site is omitted, and the existing pipeline can be used, etc. The excellent ``Aj Song'' that enables power generation that corresponds to the ☆ of ``i''.
1

[Brief explanation of drawings]

Figure 1 is an explanatory diagram that does not show an example of how a coal-gas hedge is operated;
FIG. 2 is an explanatory sectional view showing an example of the method of the present invention, and FIG.
Figure (J1 is an explanatory sectional view of Figure 2, and Figure 4 is an explanatory top view of another example of the method of the present invention. 1 is a coal gasification furnace, 2 is a pie/line, 3 is an explanatory top view. (2I,
1 fuel cell, 4 pressure control 91? 5 indicates the gas storage tank, 6 indicates the valve, and 7 indicates the electric railway network. Za←Moya

Claims (1)

[Claims] 1) The gas fuel generated in the coal gasification furnace will be transported to the fuel cell installed in the power consumption area via a pipeline buried underground, and the coal gasification furnace will be operated during non-peak periods of power consumption. The coal gasifier is operated at a low load and the generated gas is stored in the pipeline, and the coal gasifier is operated at maximum load during peak power consumption to combine the generated gas and the gas stored in the pipeline. A power generation method using a fuel cell, characterized in that power generation is performed using a fuel cell.