CN105762618A - Long-time iodine flow supply device - Google Patents

Abstract

The invention relates to a long-time iodine vapor supply device, which relates to the continuous wave oxygen-iodine chemical laser gas supply technology. The main body of the device is divided into two parts, one is an electrically heated iodine vapor storage tank, and the other is a combustion chamber for burning two kinds of gases. The electrically heated iodine vapor storage tank heats solid iodine to liquid iodine at a certain temperature, and forms iodine vapor with a certain saturated vapor pressure on the liquid surface. The combustion chamber provides a closed space for carbon monoxide and oxygen to burn, and the high-temperature and high-pressure gas produced enters the iodine vapor storage tank after the temperature is adjusted by the diluted gas. High-temperature carbon dioxide gas enters the liquid phase of the iodine vapor storage tank and forms bubbles, which transfer heat energy to liquid iodine to evaporate iodine into iodine vapor, and the bubbles contain iodine vapor with a certain density. As the bubbles rise in the liquid phase, this mass and heat transfer phenomenon continues to occur until equilibrium is reached. It flows out of the liquid phase into the gas phase and then flows through the gas supply pipeline into the main body of the laser.

Description

A long-time iodine flow supply device

technical field

The present invention relates to the supply of materials for oxygen iodine chemical lasers.

technical background:

Iodine vapor is one of the necessary materials for continuous wave oxygen-iodine chemical lasers. The method of its generation determines the stability, volume and continuity of the iodine vapor flow. The method of production is mainly physical evaporation method, but also chemical method.

The physical evaporation method is to heat the solid iodine into a liquid at high temperature, and control the saturated vapor pressure of the iodine vapor on the surface of the liquid by adjusting the temperature of the iodine liquid. When the air release valve of the closed container is opened, the iodine vapor can flow out into the gas supply pipeline. The specific realization is that the iodine crystal is placed in a vacuum-tight heatable stainless steel tank, and the tank is equipped with accessories such as temperature measurement, pressure measurement, pneumatic valve and temperature control. The heating device is generally a stainless steel heating tube, and the heating temperature control of the material in the tank is realized through the temperature measuring device and the temperature control device. When the iodine vapor in the tank reaches the set value, the pneumatic valve opens, and the iodine vapor flows out into the gas supply pipeline.

The shortcoming of the iodine vapor supply device of this electric heating evaporation method is that the iodine vapor gradually decreases during the supply process, thereby causing the iodine vapor flow rate to gradually decrease. The reason is that the stainless steel heating tube is placed in the iodine liquid and has a slow conduction efficiency, which cannot meet the continuous evaporation of the iodine liquid.

Contents of the invention

The purpose of the present invention is to provide a long-time stable iodine vapor flow supply device for continuous wave oxygen-iodine chemical laser, which can meet the long-time stable operation of the laser.

In order to realize the purpose of the present invention, concrete technical scheme is:

The long-time iodine vapor supply device mainly consists of two parts, one is an electrically heated iodine vapor storage tank, and the other is a combustion chamber for burning two gases, corresponding to the characteristics of a continuous wave oxygen-iodine chemical laser, the two gases should be Carbon monoxide and oxygen, with carbon monoxide in excess. The iodine vapor storage tank adopts an electric heating system with a temperature control feedback device. When the heating reaches the set temperature, it is heated slowly so that the iodine liquid and iodine vapor in the storage tank are in a state of constant temperature and constant pressure. The function of the combustion chamber is to burn the oxidant gas and the reducing agent gas in its closed system. The high-temperature and high-pressure gas generated by the combustion reaction flows out of the iodine vapor storage tank after being adjusted by the diluted gas. The high-temperature gas in the gas storage tank passes through the gas distributor to form uniform bubbles. When the bubble rises in the liquid, it completes the mass transfer and heat transfer with the iodine in the liquid phase, and forms iodine vapor with saturated vapor pressure in the bubble and finally flows out.

The electrically heated iodine vapor storage tank of the present invention heats solid iodine to liquid iodine at a certain temperature, and forms iodine vapor with a certain saturated vapor pressure on the liquid surface. The combustion chamber provides a closed space for carbon monoxide and oxygen to burn, and the high-temperature and high-pressure gas produced enters the iodine vapor storage tank after the temperature is adjusted by the diluted gas. High-temperature carbon dioxide gas enters the liquid phase of the iodine vapor storage tank and forms bubbles, which transfer heat energy to liquid iodine to evaporate iodine into iodine vapor, and the bubbles contain iodine vapor with a certain density. As the bubbles rise in the liquid phase, this mass and heat transfer phenomenon continues to occur until equilibrium is reached. It flows out of the liquid phase into the gas phase and then flows through the gas supply pipeline into the main body of the laser.

Description of drawings

Fig. 1 is a schematic structural view of the long-time iodine flow supply device of the present invention.

detailed description

As shown in Fig. 1, the cavity 2 and the tank body 10 are respectively the combustion chamber and the fluid storage tank for the iodine material. The combustion chamber is made of stainless steel and cannot leak air at high pressure. The periphery of the combustion chamber is the intake lines 2 and 3 for oxygen and carbon monoxide. A spark plug 4 for ignition is connected to the outer wall of the combustion chamber. Pipeline 5 is used to add diluent gas such as helium or nitrogen to adjust the gas temperature. The high-temperature carbon dioxide gas flows out from the combustion chamber and mixes with the low-temperature helium gas, flows through the pneumatic valve 6 and enters the gas distributor 9 . The connecting pipeline between the pneumatic valve and the gas distributor is heated by a temperature-controlled power supply 7 and a heating belt 8, so that its temperature is the same as or slightly higher than the stable temperature in the tank. The tank body 10 also adopts the power supply 7 and the heating belt 8 to preheat the tank body so that the iodine solid contained inside becomes liquid iodine. Parts 11 and 12 are respectively thermocouples and pressure sensors for monitoring the temperature of liquid iodine and the pressure of iodine vapor in the tank. When the pneumatic valve 13 is opened, the iodine vapor in the tank flows out of the tank and enters the pipeline 14, and finally enters the main body of the laser.

Claims (7)

1. a long-time iodine vapor feedway, it is characterised in that:

Fluid reservoir (10) including airtight combustor (2) and airtight material iodine, the wall of combustor is provided with oxygen intake pipe road (1) and carbon monoxide air inlet pipeline (3), is provided with for the spark plug (4) to burning indoor gas igniting on sidewall of combustion chamber；The wall of combustor is provided with flow of carbon dioxide gas outlet；

Bottom in the fluid reservoir (10) of material iodine is provided with gas distributor (9) and is connected with diluent gas (such as helium or the nitrogen etc.) source of the gas regulating gas temperature by pipeline (5) through pneumatic operated valve (6), the connecting line between diluent gas source of the gas with pneumatic operated valve (6) is provided with the flow of carbon dioxide gas with combustor and exports the branch line being connected；

Connecting line between pneumatic operated valve and gas distributor is wound with heat tape (8)；Tank body (10) outside wall surface is wound with heat tape (8)；Tank body (10) is provided with the thermocouple (11) for monitoring liquid iodophor temperature and iodine vapor pressure in tank body and pressure transducer (12)；Tank body (10) top is provided with iodine vapor flow export, and iodine vapor flow export is connected with external pipe (14) through pneumatic operated valve (13).

2. long-time iodine vapor feedway as claimed in claim 1, it is characterised in that:

External pipe (14) is connected with the air inlet pipeline of laser bodies.

3. long-time iodine vapor feedway as claimed in claim 1, it is characterised in that:

Heat tape (8) electrically connects with power supply (7) through temperature controller；Thermocouple (11) is connected with temperature controller signal.

4. long-time iodine vapor feedway as claimed in claim 1, it is characterised in that:

Iodine vapor feedway includes the combustor of electrical heating iodine vapor storage tank and two kinds of gas combustions and infiltrates the gas distributor passing into high temperature and high pressure gas in liquid iodophor, and entering into the high-temperature gas in liquid iodophor by gas distributor is that liquid iodophor evaporation provides heat energy；The high-temperature gas that burning produces enters in gas distributor with the temperature of applicable requirement of engineering after diluent gas dilution cooling；High-temperature gas forms bubble again in liquid iodophor after gas distributor, and bubble completes the mass-and heat-transfer process in liquid iodophor in the layer that rose.

5. long-time iodine vapor feedway as claimed in claim 1, it is characterised in that: in iodine vapor supply process, liquid iodophor evaporates the heat energy required for becoming gaseous iodine and originates from the chemical energy of carbon monoxide and oxygen combustion.

6. iodine vapor feedway as claimed in claim 1 long-time, it is characterised in that in high-temperature gas bubble uphill process, the iodine of liquid phase is evaporated in bubble to be formed the iodine vapor of vapour phase.

7. long-time iodine vapor feedway as claimed in claim 1, it is characterised in that the high-temperature gas that burning produces provides heat energy endlessly for iodine evaporation, as long as the liquid iodophor in iodine vapor storage tank is enough, it is possible to long-time steady operation.