JPS62238902A - Steam generator for steam type heat transfer system - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a steam generator for a steam heat transfer system, and more specifically, the steam generated by the steam generator is guided through a steam pipe to a heat radiating part. The surrounding fluid (latent heat is given to this to release heat, the condensed liquid is temporarily stored, and then the heat of the steam generator is stopped to form a vacuum inside the steam generator. The present invention relates to a steam generator for a system in which the condensate is refluxed within the steam generator using vacuum action, and heat is transferred by repeating this process.

[Conventional technology]

This type of conventional steam generator is equipped with a high water level detector and a low water level detector inside the steam generator, as described on page 9 of the "Tokyo Gas 100th Anniversary Exhibition Booklet", and heats by combustion. The system is configured to run on/off mode.

[Problem that the invention seeks to solve]

Since the above conventional technology requires two water level detectors,
In addition to being expensive to manufacture, the internal pressure of the secondary air generator itself is repeatedly high pressure and vacuum pressure, so when multiple water level detectors are installed, local concentrated stress acts on the parts, causing stress. This may lead to queues, etc.

The object of the present invention is to turn on/off heating with only one water level sensor.
To provide a steam generator for a steam heat transfer system that can perform off control and prevent cracks caused by locally concentrated stress.

[Means for solving problems]

The above purpose is to form a bubble generation passage inside the steam generator, provide a water level detector in the bubble generation passage at a position maintained at a constant height above the lowest liquid level, and detect liquid or foam to the water level detector. so that heating by combustion occurs when in contact;
This is achieved by configuring the heating by combustion to stop when the water level detector and the bubbles come out of contact.

[Effect]

During heating, bubbles are generated in the bubble generation passage inside the steam generator and steam generation progresses. Even if the liquid level inside the steam generator falls below the level of the water level detector, heating by combustion continues as long as the water level detector is in contact with the reservoir in the bubble generation passage.

Then, when the liquid level drops to the lowest level and the water level detector and the bubbles come out of contact, the sword heat stops. Next, the inside of the steam generator is cooled and the condensed water is refluxed due to the IC action.
When the liquid level rises above the water level sensor, heating starts again. That is, heating on/off control is performed using one water level detector.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. The figure shows a cross-sectional view of a steam generator according to the invention, in which 1 is a shell, 2
3 is a burner that heats the shell 1; 4 is a combustion wall that surrounds the burner 3 and the shell 1; 5 is a combustion wall that guides the steam taken out from the steam outlet 2 to a radiator 6; The steam pipe 7 is a liquid storage tank that stores the condensate condensed in the radiator 6. 8 is a bubble generation passage formed along the inner wall f of the shell 1; 9+ is a wall of the bubble generation passage 8, and the lower part of this wall 9 is a passageway 8 for discharging the liquid in the shell 1.
A steam hole 11 is provided at the top to exhaust the steam generated in the bubble generation passage 8 into the shell 1. 12 is provided in the bubble generation passage 8. This water level detector 12 is a shell 1
The water level detector 1 is installed at a position where a constant height H is maintained above the lowest liquid level of the shell 1.
2 is of a type in which the resistance value changes when it comes into contact with liquid, for example. Then, the water level detector 12 and the burner 3 are moved, and the water level detector 18 and the foam generation passage 8 are moved.
When the liquid inside or the liquid on the surface of the bubbles comes into contact, combustion occurs by the burner 8, and when the water level detector 13 and the bubbles come into contact with each other, combustion in the burner 8 stops.

Next, the operation of this embodiment will be explained. When the liquid level in the shell 1 is above the water level detector 12 (the liquid level in the moss and bubble generation passage 8 is also kept the same as the liquid level in the shell 1 circle), the water level detector 12 and the liquid are The burner 8 burns and heats the shell 1.

This heating generates steam within the shell 1, while bubbles 18 and steam are generated within the foaming passage 8. These steams are led from the steam outlet 2 through the steam pipe 5 to the radiator 6, where they impart latent heat to the surrounding fluid to become a condensed liquid, which is stored in a liquid storage tank 7. The liquid level in the shell 1 gradually decreases as the sword mouth heat of the 7L 1 progresses, but while the i-plane is lower than the water level detector 12 to a certain distance H, the water level detector 12 and the bubble 18 are in contact, so
Combustion in burner 8 continues. Then, when the liquid level drops to the above-mentioned dimension H or more, the water level detector 12 and the bubbles 18 come out of contact, and the combustion of the burner 3 stops, that is, the heating of the shell 1 stops. When the heating of the shell 1 is stopped, the degree of filling in the shell 1 is reduced to create a vacuum state, and the condensed liquid stored in the liquid storage tank 7 is refluxed into the shell 1 due to the vacuum effect. When the liquid level in the shell 1 reaches the same height as the water level detector 12 or higher than this reflux, the burner 3 starts combustion again.

Therefore, in this embodiment, heating can be turned on and off using one water level detector 12, and costs can be reduced. Also, since you only need to install one water level detector,
Conventional technology (this method can prevent cracks caused by locally concentrated stress, which is a problem here).

〔Effect of the invention〕

As explained above, according to the present invention, it is possible to control the cutting edge heat on and off with only one water level detector, thereby reducing costs. Concentrated stress (cracks caused by this can be prevented).

[Brief explanation of drawings]

The drawing is a sectional view showing an embodiment of a steam generator of a steam heat transfer system of the present invention. ■...Shell 8...Bubble generation passage 12...Water level detector 2・Riff Hiruzumi Renryo

Claims (1)

[Claims] 1. The steam generated by the steam generator is guided through the steam pipe to the heat radiating part, which gives latent heat to the surrounding fluid and releases heat. The condensed liquid is stored once, and then the steam is passed through the steam generator. In a steam-type heat transfer system in which heating is stopped to form a vacuum inside the steam generator, the condensate is refluxed into the steam generator using this vacuum effect, and heat is transferred by repeating this process, A bubble generation passage is formed inside the steam generator, a water level detector is provided in the bubble generation passage at a position maintained at a constant height above the lowest liquid level, and the liquid or foam is in contact with the water level detector. 1. A steam generator for a steam-type heat transfer system, characterized in that the heating by combustion is performed when the water level detector and the bubbles come out of contact, so that the heating by combustion is stopped.