JPH0792201B2 - Metered steam generator - Google Patents

Description

TECHNICAL FIELD The present invention relates to a steam generator used in a space with limited resources (for example, a space station, a submersible, etc.).

(Prior Art and its Problems) FIG. 2 shows a conventional steam generator. Reference numeral a is a steam generator, which is heated by a heater b to generate steam. In this case, when supplying steam quantitatively with the steam generator a, it is necessary to separately install a steam reservoir c and measure the steam flow rate and water level. For this reason, there are problems that the device becomes large and complicated, that the followability is not good when changing the steam supply amount, and that it takes time at startup due to the need to heat the internal water. there were.

(Object of the invention) In view of the problems of the prior art, it is an object of the present invention to provide a small-sized, lightweight, and energy-saving constant-quantity steam generator suitable for use in a space where resources are limited.

(Solution to be Solved by the Invention) A steam generator outer cylinder having a steam supply pipe, and a steam generator inner cylinder provided concentrically with the outer cylinder and provided with a space for storing steam are provided in the steam generator inner cylinder. Is equipped with an air-cooking pipe heater in the center, a water supply pipe that opens in the upper part of the steam generator inner cylinder and communicates with the metering pump, and a space for the pipe heater in the steam generator inner cylinder. Fill the packing with a small specific heat,
The temperature of the pipe heater can be controlled directly by measuring the heater surface temperature through the heater surface temperature measurement hole.

(Example) FIG. 1 shows an example. Reference numeral 1 is a steam generator outer cylinder (hereinafter referred to as an outer cylinder). A steam reservoir 2 is placed between the outer cylinder 1 and the outer cylinder 1 in the center of the outer cylinder 1, and the steam generator inner cylinder (hereinafter referred to as the inner cylinder)
3 are concentrically provided. The top and bottom of the outer cylinder 1 are sealed by a top plate 4 and a bottom plate 5.

Reference numeral 6 is an air-cooking pipe heater, which controls the heater while keeping the heater surface temperature constant by thyristor power control. Reference numeral 7 is a heater head, and 8 is a water supply pipe, which supplies water into the inner cylinder 3 from a nozzle at the tip thereof, and can be taken out for the necessity of maintenance. Reference numeral 9 is a filling material in the inner cylinder, which has a function of heat transfer from the surface of the pipe heater 6 and a function of diffusing water, and a substance having a small specific heat such as Raschig rings and alumina balls in order to improve the rising of the pipe heater. Is used.

10 is a heater surface temperature measuring hole, and a temperature sensor is attached to this to measure the heater surface temperature. 11 is a steam supply pipe,
If there are multiple supply destinations, place the steam generator in the center and connect each supply destination directly to prevent heat loss. Further, it is preferable to install the pipe obliquely so that the drain condensed in the steam supply pipe 11 returns to the inside of the steam generator. 12 is a safety valve mounting pipe to which a safety valve for steam generator overpressure prevention is attached. 13 is a drain outlet pipe, 14 is a drain return taper part,
It can be returned to the inside of the steam generator inner cylinder 3 and steamed again. Reference numeral 15 denotes a steam outlet hole, which is a vent hole for steam from the steam generator inner cylinder 3 to the steam reservoir 2 and is provided at, for example, four places.

The water discharged from the metering pump through the water supply pipe 8 to the upper part inside the steam generator inner cylinder 3 is heated to become steam while flowing down between the pipe heater 6 and the filler 9 and diffusing. Since the heat transfer property is improved in this manner, the steam can be instantly vaporized, so that the steam supply amount can be easily changed by changing the water supply amount, and the followability is also improved. The heater surface temperature can be measured from the heater surface temperature measuring hole 10 and the amount of heat lost due to the evaporation of water can be supplied by the pipe heater 6 and kept constant at all times.

The steam enters the steam reservoir 2 between the steam generator inner cylinder 3 and the steam generator outer cylinder 1 through the steam outlet hole 15 in the lower part of the inner cylinder. The steam in the vapor reservoir 2 is supplied to a predetermined supply destination through the steam supply pipe 11.

Although the above embodiment has been described as a steam generator to be used in a space with limited resources, the steam generator is not limited to this application, and it is necessary to accurately control the steam supply amount,
For example, it can be used for applications such as 1) a steam supply device for regeneration in a carbon dioxide gas removing device using solid amine, 2) a humidifying device, and 3) steam distillation.

(Effect) The water supplied into the steam generator inner cylinder 3 through the water supply pipe is instantly heated to steam while passing through the pipe heater 6 and the filler 9 and diffusing and flowing, so the amount of water supply should be changed. Thus, the steam supply amount can be easily changed.

Further, since the steam reservoir 2 is formed so as to be in direct contact with the outside of the steam generator, the steam pulsation is suppressed, and the heat generated from the steam generator inner cylinder 3 is used to heat the steam reservoir 2 to prevent the generation of drainage. be able to. At the same time, heat radiation to the outside can be suppressed. Thus, it is possible to reduce the size of the device and save energy.

[Brief description of drawings]

 FIG. 1 is a vertical cross-sectional view of a metered steam generator according to the present invention. Figure 2 shows a conventional steam generator. In the figure: a ... steam generator, b ... heater c ... steam reservoir 1 ... steam generator outer cylinder, 2 ... steam reservoir 3, ... steam generator inner cylinder, 4 ... top plate 5 ... bottom plate , 6 ... Pipe heater for air cooking 7 ... Heater head, 8 ... Water supply pipe 9 ... Filling material, 10 ... Heater surface temperature measurement hole 11 ... Steam supply pipe, 12 ... Safety valve mounting pipe 13 ... Drain outlet pipe, 14 …… Taper part for drain return 15 …… Steam outlet hole

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-62-242702 (JP, A) JP-A-61-243201 (JP, A)

Claims (1)

[Claims] 1. A steam generator outer cylinder having a steam supply pipe,
A steam generator inner cylinder concentric with the outer cylinder and having a space for storing steam, and a steam heating pipe heater in the center of the steam generator inner cylinder; and a steam generator inner cylinder A water supply pipe that opens at the upper part of the inside of the steam generator is connected to the metering pump, and a space with a small specific heat is filled in the space inside the steam generator inner cylinder that surrounds the pipe heater. A fixed-quantity steam generator characterized in that the temperature of the pipe heater can be directly controlled by measuring the temperature.