JPS61200359A - Metal combustion device for underwater sailing body - Google Patents

Abstract

PURPOSE:To prevent hole blocking of a nozzle and its reverse flow or the like, by shielding the point end of the nozzle, which injects oxidizing agent gas, by an alkaline metal, in the case of a combustion device placing the alkaline metal in a melted condition to perform its combustion by injecting the oxidizing agent gas. CONSTITUTION:A combustion device, when it performs combustion of an alkaline metal 5 in a combustion chamber 1, first ignites a starting heat generating agent 6, inserted into said alkaline metal 5, by an ignition cable 7. In this way, the heat generating agent 6, being heated, heats the alkaline metal 5 to be melted. Here a point end part 3a of an oxidizing agent gas injection nozzle 3 is spaced from the heat generating agent 6 and shielded by an alkaline metal 5'. And the alkaline metal 5', being melted and absorbing high temperature heat generated by said heat generating agent 6, protects said point end part 3a from the heat generated by the heat generating agent 6. Thereafter, the combustor, injecting the oxidizing agent gas from the injection nozzle 3 into the combustion chamber 1 and inducing the reaction of Li as the alkaline metal 5 and SF6 as the oxidizing agent gas in the combustion chamber 1, obtains thermal energy.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a metal combustor that melts alkali metal and burns it by injecting oxidizing gas, and is particularly useful as a power source for underwater vehicles. The present invention relates to a metal combustor suitable for use in a steam generator.

[Conventional technology]

In general, closed systems are used as power generators for propulsion of underwater vehicles, which are becoming deeper and more powerful.
sed 5yste+n) is considered to be effective, and in order to achieve this, a fuel with a small volume change before and after the reaction and a high energy density is required.

Incidentally, alkali metals (for example, lithium; Li) are attracting attention as such fuels, and by adding an oxidizing agent (for example, sulfur hexa7ide; 5F6) to these metals, the following reaction can be obtained.

8Li+5Fs=Li2S+6LiF +3.6kWHr/kg (per unit weight of I-i and SF6) A metal combustor that performs such a reaction needs to melt the alkali metal in a short time (on the order of a few seconds) when starting combustion. There is. This is because alkali metals hardly react with oxidizing agents in their solid state. Furthermore, due to the special circumstances of being used for underwater vehicles, there are various restrictions, and starting exothermic agents for melting alkali metals that satisfy these restrictions have conventionally been used. This exothermic agent also has the function of assisting the relatively slow-response reaction of metal combustion, and greatly contributing to the rapid increase in output in the initial stage of the power generator.

[Problem that the invention seeks to solve]

However, when burning the alkali metal by heating and melting the alkali metal using an exothermic agent and then injecting the oxidizing gas from the oxidizing gas injection nozzle as described in -, the radiant heat generated by the exothermic agent, etc. As a result, abnormalities such as hole clogging and backflow of the oxidizing gas occur in the injection nozzle due to high temperature heating, resulting in a problem that the oxidizing gas cannot be injected into the combustion chamber.

The present invention aims to solve these problems, and prevents abnormal situations such as hole clogging and backflow caused by the heat of the starting exothermic agent in the injection nozzle, and prevents the occurrence of abnormal situations in the combustion chamber. An object of the present invention is to provide a metal combustor for an underwater vehicle, which can reliably inject oxidant gas into the body.

[Means for solving problems]

Therefore, the metal combustor for an underwater vehicle of the present invention includes a sealed combustion chamber having a water cooling groove on the outer periphery, an alkali metal cast in the combustion chamber, and an alkali metal combustor cast in the combustion chamber. A heating agent for starting is inserted into the combustion chamber, and an oxidizing agent injection nozzle is provided at one end of the combustion chamber so as to face the heating agent across a gap from the heating agent, the tip of the injection nozzle. The present invention is characterized by being provided with an alkali metal support member disposed near the support member, and an alkali metal supported by the support member to shield the tip of the injection nozzle marked -J-.

[For production]

In the dual metal combustor for underwater vehicle of the present invention, the tip of the oxidant gas injection nozzle is protected from the heat of the starting exothermic agent by the alkali metal supported by the alkali metal support member, and Abnormal situations such as hole clogging and backflow in the injection nozzle are prevented from occurring.

〔Example〕

Hereinafter, a metal combustor for an underwater vehicle as an embodiment of the present invention will be explained with reference to the drawings. Inside the chamber 1, an alkali metal 5 is cast into a cylindrical shape, and further, a heating agent 6 for starting is inserted inside the alkali metal 5.

Further, an oxidizing gas injection nozzle 3 is provided at one end of the combustion chamber 1.
is arranged to face the starting heat generating agent 6 with a gap therebetween. The tip 3a of this injection 7 nozzle 3 is located in the combustion chamber 1.
A ring 4, which protrudes inward and serves as an alkali metal support member, is disposed on the outer periphery near the tip 3a.

Inside the ring 4, there is a tip 3 of the injection nozzle 3.
An alkali metal 5' is supported by the ring 4 and provided so as to shield the a.

The reference numeral 7 in the figure indicates an ignition line for igniting the starting exothermic agent 6, and the ignition line 7 ignites the starting exothermic agent 6 to heat and melt the alkali metals 5 and 5'. It has become.

41 The metal combustor for an underwater vehicle of the present invention is configured like a double series, so when burning the alkali metal 5 in the combustion chamber 1, first the metal combustor inserted into the alkali metal 5 is inserted into the combustion chamber 1. The starting exothermic agent 6 is ignited by the ignition line 7. Thereby, the exothermic agent 6 generates heat and heats and melts the alkali metal 5.

At this time, the entire interior of the combustion chamber 1 is exposed to high heat due to radiant heat generated by the starting heating agent 6, but the tip 3a of the oxidizing gas injection nozzle 3 is spaced apart from the heating agent 6, and the alkali metal Since the tip 3a of the oxidant gas injection nozzle 3 is shielded by the alkali metal 5', the high heat generated by the exothermic agent 6 is absorbed by the melting of the alkali metal 5', and the tip 3a of the oxidizing gas injection nozzle 3 is , are protected from heat generation by the exothermic agent 6.

After heating and melting the alkali metal 5.5' in this way, SF6 as an oxidizing gas is injected into the combustion chamber 1 from the injection nozzle 3 as shown by arrow C in FIG. In the chamber 1, Li as the alkali metal 5 and SF6 as the oxidant gas are reacted to obtain thermal energy.

The controlled temperature inside the combustion chamber 1 is 800 to 1100°C.
Although the surrounding components are kept at a certain temperature, each member around the combustion chamber receives a high heat load. However, the cooling that flows in the direction from arrow A to arrow B in FIG. Heat exchange is efficiently performed with water or its steam.

'' In the metal combustor of the present invention, before burning the alkali metal 5, while the alkali metal 5 is heated and melted by the exothermic agent 6, the tip 3a of the oxidizing gas injection nozzle 3 Since it is covered with the alkali metal 5' and is protected from the heat of the exothermic agent 6, it is possible to prevent abnormal situations such as clogging of holes and backflow due to the heat of the exothermic agent 6 in the injection nozzle 3, thereby preventing combustion. Oxidizing gas can be reliably injected into the chamber 1.

In this way, according to the metal combustor of the present invention, metal combustion reactions can be carried out extremely safely and efficiently.

〔Effect of the invention〕

As described in detail below, the metal combustor for an underwater vehicle of the present invention includes a sealed combustion chamber having a water cooling groove through the outer circumference, and a metal combustor cast into the combustion chamber. an alkali metal, a starting heating agent inserted into the alkali metal, and an oxidizing agent injection nozzle disposed at one end of the combustion chamber so as to face the heating agent across a gap. It has an extremely simple structure, comprising an alkali metal support member disposed near the tip of the injection nozzle, and an alkali metal supported by the support member to shield the tip of the injection nozzle. This prevents abnormal situations such as hole clogging and backflow in the oxidant gas injection nozzle, and makes it possible to reliably inject oxidant gas into the combustion chamber, making it possible to generate steam efficiently and safely. It has the advantage of being suitable for use in a 4J force generator for propulsion as a closed system in an underwater vehicle.

[Brief explanation of drawings]

The attached drawing is a longitudinal sectional view showing a metal combustor for an underwater vehicle as an embodiment of the present invention. 1. Combustion chamber, 2. Water cooling groove, 3. Oxidizing gas injection nozzle, 3a. Tip of oxidizing gas injection nozzle, 4
...Ring as alkali metal support member, 5, 5'
...alkali metal, 6.. exothermic agent for starting, 7.. ignition wire.

Claims (1)

[Claims] A sealed combustion chamber having a water cooling groove on the outer periphery, an alkali metal cast into the combustion chamber, a starting exothermic agent inserted into the alkali metal, and one end of the combustion chamber. an oxidant gas injection nozzle disposed to face the exothermic agent with a gap therebetween, and an alkali metal support member disposed near the tip of the injection nozzle;
A metal combustor for an underwater vehicle, characterized in that an alkali metal is supported by the support member and shields the tip of the injection nozzle.