JPS5946304A - Power generation - Google Patents

Abstract

PURPOSE:To enable to generate the power without limitation of physical feature by a method wherein a liquid alcohol is manufactured from raw material gas obtained by the gasification of fuel, then said alcohol is stored, also the burning of remaining combustible gas is utilized for electrical power generation. CONSTITUTION:Fuel 1 is gasificated by a gasification process 2, cooled by a heat recovery device 3, then directly fed to burning process from a passage 10 via a gas purification process 4, or fed to a methanol synthetic process 5, a product is fed to methanol recovery device 6, a methanol is stored in a methanol storage tank 7, an extracted gas 8 is recycled by a passage 9 or directly fed to a burning process 12. For reducing of electrical power generation, that is, for increasing of the stored nergy as the methanol, a hydrogen 19 is fed to methanol process 5. A burning gas 14 drives a turbine 15 and generates the electrical power 20.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a power generation method, and more particularly to a power generation method using fuel materials such as hydrocarbons such as fossil fuels such as coal and petroleum. More particularly, the present invention relates to a method of generating electricity by storing or using surplus energy to respond to temporal fluctuations in power demand.

The use of electricity brings great benefits to humanity, and in order to meet the expanding demand, various power generation methods such as hydropower, thermal power, and nuclear power have been proposed and put into practice.

Various power generation facilities are installed to meet the maximum demand that must be met, but on the other hand, power demand fluctuates greatly over time. Since electric power is not easy to store, it would be possible to change the operation of the power generation equipment to follow the above fluctuations, but this is not easy in terms of efficiency. Therefore, as a method of storing surplus power during times of low demand as another type of energy, pumped storage power generation, in which the surplus power is used to pump water into a tank and generate hydroelectric power during times of high demand, has already been put into practical use. However, there are various geographical conditions to use a dam.

Due to geographical constraints, for example, there are almost no economically viable locations in Japan. Pumped storage power generation is completely impossible on islands where it is difficult to construct landforms.

In view of this situation, the present invention was achieved as a result of thorough inspection by the present inventor. That is, the present invention provides a method of pretreating the gas obtained by gasifying a fuel material, if necessary, to obtain a raw material gas, and at least one of the following: - culm or a simultaneous combination of two or more thereof. A power generation method that responds to fluctuations in electricity demand.

a. Burn the raw material waste and use it for power generation.

b. Manufacture and store liquid Alcono 1 from the raw material Enonos.

Liquid alcohol/l is produced from 1 liter of C raw material and stored, and the remaining flammable/J gas is burned and used for power generation.

d The liquid obtained in Suya C above +1., =l,
-71 will be used for power generation.

It is.

The present invention is completely different from conventional pumped storage power generation. That is, in pumped storage power generation, the electric power already generated by various methods is stored as potential energy, whereas in the present invention, the energy contained in the fuel material is stored as chemical energy before being converted into electric power. , which is used for power generation. Furthermore, liquid L-L-1-L, which is a chemical energy storage substance, has the advantage that it can be used for purposes other than power generation, such as basic chemical raw materials or fuel, in some cases, and can be stored with almost no geographical constraints such as in pumped-storage power generation tanks. There are also advantages.

The liquid alcohol referred to in the present invention is a compound consisting of carbon, hydrogen, and oxygen that is liquid in the environment in which it is stored and used, and liquid alkanols, among which butanol, propatool, ethanol, and methanol are typical examples. .

For energy storage, it is better to have a large number of carbon atoms (but it is easier to handle chemical processes with a small number of carbon atoms.It may be a mixture of two or more of these types, but it is easier to handle them in chemical processes.

A temperature with a smaller difference in chemical properties is easier to handle and is preferred for the present invention.

In the present invention, the fuel substance is not particularly limited as long as it is a substance that generates flammable residue that can be converted into liquid 1111)1, but fossil fuels such as coal and petroleum are typically used. , or from these, c+jl, various sea lion derivatives, extracts from plants and animals, tree bark, charcoal, bark, etc., and a few of them.
Lc (both types are used for pre-treatments such as crushing and mixing as necessary).

Typical pretreatments that may be performed on the gas obtained by gasifying fuel materials in the present invention include removal of impurities such as desulfurization and hydrogen CO reaction;
There are steps such as carving to increase the content of ingredients, and in this case, a step of pre-cooling the impurity-containing scum to a required temperature and recovering heat is usually included.

In the present invention, the above-mentioned d)-Lucono! There are no particular limitations on how to use hydrogen, as long as electricity can be obtained, but typical methods include 1) using it by face-to-face combustion, and 11) obtaining hydrogen and carbon monoxide using various types of flannel burners. 1ii) It is converted to Hz using a steam refrigerant and used as fuel for a fuel cell.

When using gas or methanol for power generation in the above Q, c, i) and 11), the scum itself or the scum generated by burning the gas tongue drives the gas star hin to generate electricity, and one caster hin generates electricity. It is desirable to generate electricity by using aetrugy in multiple stages, such as using exhaust gas as a heat source for the boiler and driving a turbine with steam from the boiler to generate electricity.

As mentioned above, the method of the present invention is particularly useful in remote islands, etc., but it is also useful in lands lacking water sources.
If the water discharged from the fuel cell in 1) is recovered, fresh water that can be used for various purposes can be obtained. If necessary, it is possible to recover heat from the four B temples and use seawater, which is abundant and inexpensive, if it is only necessary to cool it.

In the method of the present invention, if it is desired to increase the proportion of energy stored as liquid 7-N-1 alcohol, a recycling method commonly used in methanol synthesis, for example, may be used in the liquid alcohol synthesis step. Hydrogen component in the raw material gas, such as when starting from a hydrocarbon fuel material to increase the storage percentage of liquid alcohol. When there is a shortage of energy, a typical method is b) adding hydrogen as a raw material in addition to the raw material gas to the methanol synthesis process. It is suitable when there is a large amount of surplus power generated by other power generation methods, such as nuclear power generation, which has been increasingly used in recent years, which is difficult to reduce. In other words, hydrogen obtained by electrolyzing water with surplus power is used. do. In general, it is best to receive electricity that is easy to transport near a power plant that implements the method of the present invention, and obtain hydrogen there.

The effects of the method of the present invention will be specifically explained below, but of course the present invention is limited to these examples. It's a method. By the way, as a method of gasifying fuel materials and then combusting them, it is easy to use the efficient Humbind cycle, but gasification is generally a high-temperature chemical operation, and low-load operation is not advantageous and difficult. It is important to increase the operational efficiency of the process.

In the method of Example I, considering fluctuations in power demand over two months of the year, day and night, it is possible to operate only about 70 lines per year on average. On the other hand, in Example U and the side layer method described below, since the method of the present invention is adopted, a sufficiently high operating rate of 90% can be stably maintained even considering the safety factor. .

Example ■ in Table 1 is a method of generating electricity using only fuel materials, apart from operating power, etc. In low-demand B'lVC, a part of the raw material gas is converted to methanol using the one-through method, and the remaining gas is used for combined cycle power generation. (anus-B), and the amount of power generation is 8
Up to 10,000 KWH/H can be reduced by 200,000 KWH/H compared to 1.

Assuming that this operation is carried out for 12 hours for simplicity, if the methanol stored during this period and the raw material gas are used for combined cycle power generation without methanol synthesis (that is, by bypassing the methanol synthesis route) for the same 12 hours, then ( It-A), 200,000 KWH/H more than ■ 31
Electric power of 10,000 KWH/H is obtained, and the gasification operation rate is stably maintained at 90% during this period. In Example 1 of Table 1, the power generation amount in 1-B is 660,000 yen except that hydrogen power is input in addition to the raw material NONOS during methanol synthesis as an external hydrogen source for methanol synthesis. While it is possible to reduce the power consumption to 1.65 million KWH/H, F-A can actually generate 1.65 million KWH/H.

In these examples, the maximum/minimum power generation ratio is 100 in example ■.
/62. The ratio is 100/40, but if the time required for operation A is 6n near and the time for operation B is 18 hours, then the amount of methanol obtained by operation B is 100/40. is 15 times greater, and the amount of methanol that can be inputted per hour to the operation of A is three times greater. During this period, a total of 1,710,000 KWH/H of electric power can be obtained due to this contribution.

Also, in the examples in section 2, it is omitted for simplicity, but in the operation of A,
Then, by inputting some of the raw material gas into the meku/-synthesis route and using the other part directly for power generation, it is possible to store energy and reduce the amount of power generation without reducing the gasification operation rate. .

By combining the various operating methods understood from the above examples and explanations, and changing the gasification operating rate within the permissible range, it is possible to adjust to the temporal fluctuations in electricity demand by considering the safety factor. Easy to drive.

Next, a typical example of the present invention will be explained with reference to FIG. The fuel substance] is gasified in gasification step 2, cooled in heat recovery device 3, and then passed through gas purification step 4 to route 1.
The product stream passes through a methanol collector 6 and the methanol enters a methanol storage tank 7 and the exhaust gas 8 is recycled via path 9 and/or enters a direct combustion step 12. enter.

(The conventional method uses only route 10.) Reduce the ratio of recycle gas, stop recycling, stop methanol synthesis, and add methanol to the combustion process from route 11.
By inputting 1,000 liters of gas, etc., higher output power generation is sequentially performed while the gasification operation remains constant. To reduce the amount of power generation, that is, increase the energy stored as methanol, follow this order in reverse.As shown in the figure, the hydrogen 19 is not input to the methanol synthesis step 5, and the fuel flow input through the methanol synthesis step 5 is combusted by the air 13. The obtained combustion gas 14 is sent to the turbine 15
is driven to generate electric power 20, then steam is generated in the boiler 16, and this manual operation drives the turbine 17 to generate electric power 21.

The exhaust steam from turbine 17 is returned to boiler 16 via condenser 18. Heat recovery device 3゜methanol recovery device 6. The heat obtained by recovering the heat from the raw material gas (not shown) in the condenser 189 may, of course, be utilized in various places inside and outside the main system as appropriate. Note that the above description with reference to FIG. 1 is only one specific example of the present invention, and therefore the present invention is not limited thereto. In addition, in order to use the system of the present invention in a self-contained manner during the σ season when surplus power is still generated by the ``--pile-up method,'' electrolysis of water can be performed to obtain hydrogen, and this hydrogen can be used as appropriate. Can be used for methanol synthesis.

[Brief explanation of the drawing]

FIG. 1 is a schematic process diagram illustrating a typical example of the present invention. Applicant: Toyo En7 Senioring Co., Ltd. Agent: Akimine Osu

Claims (1)

[Claims] The gas obtained by scuming the fuel material is subjected to pretreatment if necessary to obtain a raw material gas, and at least one of the following steps or a simultaneous combination of two or more thereof is performed. A power generation method that responds to fluctuations in electricity demand. a The raw material gas is combusted and used for power generation. b Manufacture and store liquid alcohol from raw material gas. Liquid Alco-1 is produced and stored from the C1 raw material gas, and the remaining pJ flammable residue is burned and used for generation. dJ-Liquid it obtained with C1, near/l
is used for power generation.