JPH0823688A - Thermion gneration furnace - Google Patents

Abstract

PURPOSE:To effectively utilize thermal energy and at the same time eliminate the need for bottoming cycle by performing excessive enthalpy combustion utilizing the enthalpy of combustion gas of a thermion generation furnace. CONSTITUTION:A heat-accumulation combustion equipment 6a or 6b of a thermions generation furnace 1 performs excessive enthalpy combustion utilizing the enthalpy of a combustion gas, air 14 for combustion is preheated via a thermion generator 3, and preheated air for combustion 15 is supplied to one heat-accumulation combustion equipment 6 via a switching valve 8. Then, the supplied air is combusted with a fuel 13 and a high-temperature site which can generate thermions is formed in a body 2 and a combustion gas which is combusted in one heat-accumulation combustion equipment 6b heats the other heat-accumulation combustion equipment 6a to produce 200-300 combustion exhaust gas 16' and is exhausted via the switching valve 8, thus remarkably reducing the amount of heat of a combustion exhaust gas 16. As a result, combustion energy can be effectively utilized and no bottoming cycle is required since the combustion exhaust gas temperature sufficiently low.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thermoelectron generator equipped with a thermoelectron generator for supplying electric power to an external load by collecting thermoelectrons emitted from a high temperature emitter electrode by a low temperature collector electrode. It is about.

[0002]

2. Description of the Related Art As a response to global environmental problems such as global warming due to carbon dioxide emissions and ozone layer depletion due to the release of CFCs, and to the tightening of energy supply and demand accompanying the sophistication of living environment, In recent years, there has been a strong demand for the development of an energy supply system that efficiently uses fossil fuels to generate electricity.

For this purpose, the combined cycle of the power generation system, the cogeneration, and the dechlorofluorocarbon of the air conditioning system are achieved, and as shown in FIG. 3, the energy is used in a cascade manner according to its quality. It is necessary to build a utilization supply system. In the topping cycle, power is generated using the engine and turbine, and in the bottoming cycle, exhaust heat from the topping cycle, city exhaust heat, etc. is pumped up using a heat pump to obtain energy saving such as obtaining cold / hot water for heating / cooling and hot water supply. System required.

FIG. 4 shows a conventional power generator having a thermoelectric generator as a topping device and a steam turbine as a bottoming device. The thermoelectron power generation furnace 1 ′ has a main body 2 and a thermoelectron power generator 3 that uses the heat of the main body 2, supplies fuel 13 to the main body 2 and burns the exhaust gas 16 of the bottoming device 20. It is supplied to the heat boiler 21. On the other hand, the external air 14 is sent to the thermoelectron generator 3, is heated by cooling the low temperature side electrode, becomes preheated air 15, is supplied to the main body 2, and is burned in the main body 2 together with the fuel 13 described above. Further, in the bottoming device 20, the exhaust gas 16 from the thermionic power generation furnace 1 ′ is supplied to the exhaust heat boiler 21, and after exchanging heat with the exhaust gas heat, it is exhausted as the exhaust gas 32.

On the other hand, the water 3 supplied from the water supply pump 28
0 becomes steam 31 in the exhaust heat boiler 21, and the steam 31 rotates the generator 29 in the steam turbine (S / T) 26 to generate electricity. The steam 31 ′ discharged from the steam turbine (S / T) 26 passes through a condenser 27 and again a water supply pump 28.
Is supplied to the exhaust heat boiler 21.

[0006]

However, the conventional thermionic power generation reactor 1'has a high temperature field of, for example, 1300 to 1300.
Although a large amount of fuel 13 was required to form 2000 ° C., only part of the heat energy was available. Further, the combustion exhaust gas 16 has a high temperature, for example, 1000 to
Since it is discharged at 1700 ° C., a bottoming cycle such as a Brayton cycle or a Rankine cycle was required also from the viewpoint of thermal efficiency. Therefore, the feature of the thermoelectron generator 3 having no movable part was not utilized. Furthermore, the power plant is complicated, and there are restrictions on cost and installation area.

An object of the present invention is to solve the problems of the conventional thermionic power generation furnace, to provide a simple and economical thermionic power generation furnace which can effectively use thermal energy and does not require a bottoming cycle. It is to be.

[0008]

In order to solve the above problems, the present invention relates to a thermoelectron generator for supplying electric power to an external load, and a combustion for forming a high temperature field necessary for operating the thermoelectron generator. In a thermionic power generator equipped with a furnace, excess enthalpy combustion is performed by utilizing the enthalpy of the combustion gas of the thermionic power generator.

Furthermore, in the above invention, the combustor is a pair of heat storage type combustors capable of storing heat, and the thermionic power generator supplies combustion air to the heat storage type combustor, and the heat storage type combustion. It is equipped with a switching valve for discharging the combustion exhaust gas generated in the reactor.

The thermionic power generator includes a plurality of thermionic power generators.

[0011]

Since the thermionic power generating furnace of the present invention performs the excess enthalpy combustion utilizing the enthalpy of the combustion gas, it is possible to form a high temperature field required for thermionic emission of the thermionic power generator. At the same time, the temperature of the exhaust gas discharged from the thermionic power generator becomes sufficiently low, and the combustion energy is sufficiently utilized for power generation of the thermionic power generator.

That is, the combustor of the above-mentioned thermionic power generator is a pair of heat storage type combustors capable of storing heat, and the thermionic power generation furnace supplies combustion air to the heat storage type combustor and is a heat storage type combustor. Since it is equipped with a switching valve for discharging the generated combustion exhaust gas, the preheated combustion preheated air is supplied to the one heat storage type combustor through the switching valve via the thermoelectron generator.
There, it burns with a relatively small amount of fuel, creating a high temperature field for the thermionic generator. Then, the combustion gas burned in the one heat storage type combustor heats and stores heat in the other heat storage type combustor, and is discharged through the switching valve. Therefore, the combustion gas is subjected to excess enthalpy combustion by giving heat to another heat storage combustor. By switching the switching valve, two heat storage type combustors are used for alternation,
By forming a high temperature field for the thermionic power generator and performing excess enthalpy combustion, it is possible to provide a thermionic power generation furnace that burns with high thermal efficiency and has a simple structure and is economical.

Furthermore, since the thermionic power generator has a plurality of thermionic power generators, the heat generated by the thermionic power generator can be fully utilized and a large amount of power generation can be secured.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a thermoelectric power generation furnace according to the present invention will be described below in detail with reference to the drawings. FIG. 1 is a system diagram showing an embodiment of a thermoelectron power generator according to the present invention, and FIG. 2 is a system diagram showing a state in which the switching valve is switched in the embodiment of FIG.

As shown in FIG. 1, the thermionic power generator furnace 1 includes a thermionic power generator 3 for supplying electric power to an external load, and a pair of high temperature fields required to operate the thermionic power generator 3. The heat storage type combustors 6a, 6b and the thermionic power generator 3 have combustion air 14
And a preheating air 15 to the heat storage type combustor 6b for combustion, and to discharge combustion exhaust gas 16 'generated in the heat storage type combustor 6a. The pair of heat storage type combustors 6a and 6b are capable of storing heat, and an alternating heat exchanger having high temperature efficiency, for example, a switching type heat storage combustor can be used.

The thermoelectron power generation furnace 1 of the present embodiment having the above construction operates as follows. That is, the combustion air 14
Are preheated via the thermionic generator 3. This combustion preheated air 15 is supplied to one heat storage type combustor 6b through the switching valve 8. Therefore, it burns with the fuel 13 and is in a high temperature field where thermoelectron power generation is possible, for example 1300 to 2000 ° C
Are formed in the main body 2. And one heat storage type combustor 6
The combustion gas burned in b heats and stores heat in the other heat storage type combustor 6a, and the combustion exhaust gas 1 having a temperature of 200 to 300 ° C.
6 ', discharged through the switching valve 8 and the combustion exhaust gas 16
The amount of sensible heat of can be reduced. Therefore, the temperature of the conventional combustion exhaust gas 16 was 1000 to 1500 ° C., but became 300 ° C. or less, and the heat quantity was about ⅕.
The combustion exhaust gas temperature was sufficiently low, and the bottoming cycle became unnecessary.

Heat storage type combustor 6a or 6 of thermionic power generation furnace 1
b is for performing the excess enthalpy combustion using the enthalpy of the combustion gas, so that the thermoelectron generator 3
Can form a high temperature field required for thermionic emission of
Is sufficiently low, and the combustion energy is sufficiently used for power generation by the thermionic power generator 3.

Here, the excess enthalpy combustion means the following combustion. That is, in FIG. 1, the specific enthalpy h [J / kg] of the combustion gas 17 of the thermionic power generation furnace 1
And the excess enthalpy Δh [J / kg], which is the difference between the specific enthalpy hi [J / kg] of the mixed gas of the fuel 13 and the combustion air 14 at the thermionic power generation reactor 1, is burned so as to be as large as possible. With respect to the maximum flame temperature, it means that the calorific value of the mixed gas or the mass fraction of the fuel in the mixed gas causes the same effect as when the value is multiplied by the following equation.

(1 + Δhmax / (mf · Hl)) where Δhmax: maximum excess enthalpy [J / kg] (hmax-hi) value mf: mass fraction of fuel in the mixed gas flowing into the thermoelectric generator Rate [kg / kg] Hl: Low calorific value of fuel [J / kg] FIG. 2 is a system diagram showing a state in which the switching valve is switched in the embodiment of FIG. The switching valve 8 is switched so that the heat storage type combustor 6a is used for combustion and the heat storage type combustor 6b is used for heat storage. That is, this time, the preheated combustion preheated air 15 that has passed through the thermoelectron generator 3 is supplied to the other heat storage type combustor 6a through the switching valve 8 and burns together with the fuel 13 to generate the thermoelectron generator. A high temperature field is created for the vessel 3. Then, the combustion gas burned in the heat storage type combustor 6a heats and stores heat in one heat storage type combustor 6b, and becomes combustion exhaust gas 16 'having a temperature of 300 ° C. or less, which is discharged through the switching valve 8.
The amount of sensible heat of combustion exhaust gas can be reduced.

According to the present embodiment, the heat of the combustion gas is sufficiently recovered by the pair of heat storage type combustors, and the temperature of the combustion exhaust gas can be kept at 200 to 300 ° C. or lower. Therefore, the thermionic power generation reactor achieves a high degree of excess enthalpy combustion, can form a high temperature field with a smaller amount of fuel than the conventional thermionic power generation reactor, and has high thermal efficiency.

Further, by constructing a thermionic power generation furnace 1 in which a plurality of thermionic power generators 3 are arranged in the high temperature field,
The generated heat of the thermoelectron power generation furnace 1 can be fully utilized, and a large amount of power generation can be secured. As a result, the combustion exhaust gas temperature is sufficiently low, so that a bottoming cycle using a Brayton cycle, a Rankine cycle, or the like is unnecessary.

Although the present invention has been described in detail with reference to the embodiments shown in the drawings, the present invention is not limited to these embodiments by using the embodiments, and various modifications can be made without departing from the spirit of the present invention. In addition, it goes without saying that various modifications can be made.

[0023]

EFFECTS OF THE INVENTION According to the present invention, since the thermionic power generation furnace performs the excess enthalpy combustion, it is possible to form a high temperature field required for thermionic emission of the thermionic power generator, and at the same time, the thermionic power generation is possible. The temperature of the combustion exhaust gas discharged from the furnace is sufficiently low, the combustion energy is sufficiently effectively used for thermoelectron power generation, and the temperature of the combustion exhaust gas is sufficiently low, so that the bottoming cycle becomes unnecessary.

Further, the combustor of the thermionic power generating furnace is a pair of heat storage type combustors capable of storing heat, and the thermionic power generating furnace supplies combustion air to the heat storage type combustor and also stores the heat storage type combustor. Since the switching valve for discharging the combustion exhaust gas generated in 1 is provided, in addition to the effects of the above invention, the device is simplified, and a high temperature field can be easily formed in the thermoelectric generator by a simple switching operation.

Further, since the thermionic power generator has a plurality of thermionic power generators, in addition to the effects of the present invention, the heat generated by the thermionic power generator can be fully utilized to secure a large amount of power generation. Can be done.

[Brief description of drawings]

FIG. 1 is a system diagram showing an example of a thermionic power generation furnace according to the present invention.

FIG. 2 is a system diagram showing a state in which the switching valve is switched in the embodiment of FIG.

FIG. 3 is a chart showing an energy utilization supply system.

FIG. 4 is a system diagram showing a thermionic power generation reactor according to a conventional technique.

[Explanation of symbols]

 1 Thermionic Power Generator 3 Thermionic Power Generator 4 Combustor 6a, 6b Heat Storage Combustor 8 Switching Valve 14 Combustion Air 16, 16 'Combustion Exhaust Gas 17 Combustion Gas

Claims (3)

[Claims] 1. In a thermionic power generator equipped with a thermionic generator for supplying electric power to an external load and a combustor for forming a high temperature field required for operating the thermionic generator, excess enthalpy combustion is performed. A thermionic power generation furnace characterized by being performed. 2. The heat storage type combustor according to claim 1, wherein the combustor is a pair of heat storage type combustors capable of storing heat, and the thermionic power generator supplies combustion air to the heat storage type combustor, and the heat storage type combustor. A thermionic power generator equipped with a switching valve for discharging combustion exhaust gas generated in a combustor. 3. The thermionic power generator according to claim 2, wherein the thermionic power generator comprises a plurality of thermionic power generators.