JPH05264004A - Steam generator - Google Patents

Abstract

PURPOSE:To efficiently take out all the steam produced by an evaporator from a steam outlet CONSTITUTION:An upper header 3 of an evaporator 1 using a spiral type heat exchanger 2 is partially extended to raise a steam generating water surface 4 and a circulating passage 5 is provided with one end connected to between the steam generating water surface 4 and the spiral type heat exchanger 2 and with the other end connected to the lower end of the evaporator 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steam generator, and more particularly to a steam generator that uses a steam generated in a boiler as a heat source to generate a purer steam.

[0002]

2. Description of the Related Art A conventional steam generator will be described with reference to FIG. In FIG. 2, reference numeral 1 denotes an evaporator, which uses a spiral heat exchanger body 2. Reference numeral 11 denotes a water supply tank, which is arranged in parallel with the evaporator 1 and has upper and lower portions connected by connecting pipes 12 and 13 to form a circulation path. The circulation path of the evaporator 1 flows through one flow path of the spiral heat exchanger body 2. A steam pipe 6 is connected to the other flow path of the spiral heat exchanger body 2 so as to introduce steam as a heat source from the outside, and a steam drain is discharged by a drain pipe 7. In the spiral heat exchanger body 2, heat is exchanged between the steam and water in the circulation path, and the steam is taken out from the upper end steam outlet 8 of the evaporator 1. The water in the evaporator 1 is circulated by natural convection between the evaporator 1 and the water supply tank 11 via the connecting pipes 12 and 13.

[0003]

In the case of the above-mentioned structure, the upper portion of the evaporator 1 and the upper portion of the water supply tank 11 are connected by the connecting pipe 12
The steam generated by the evaporator 1 moves not only to the water surface above the evaporator but also to the upper surfaces of the connecting pipe 12 and the water supply tank 11, so that the steam is discharged from the steam outlet 8 to 1
I can't take out 100%. That is, the steam reaching the upper surface of the connecting pipe 12 and the water supply tank 11 dissipates heat from the equipment surface, so the temperature drops, and the steam condenses into water again. There were some problems such as the deterioration of.

The object of the present invention is to solve the above problems, to extend the upper header portion of the evaporator, and to circulate the natural convection circulation path below the steam generating water surface so that all the generated steam can be taken out from the steam outlet. It is intended to provide a steam generator.

[0005]

In order to achieve the above object, the upper header portion of an evaporator using a spiral heat exchanger body is extended so that the water surface for steam generation is at a high position, and this position and the spiral heat The steam generator was provided with a circulation path having one end connected to the exchanger body and the other end connected to the lower end of the evaporator.

[0006]

In the present invention, the upper header part of the evaporator is extended to raise the surface of water for steam generation, and the circulation path is provided under the header. Therefore, the surface of water for steam generation is only the upper surface of the evaporator, and all steam generated is Can be taken out from the steam outlet. The circulation path is circulated by natural convection between the upper part and the lower part of the spiral heat exchanger body used as an evaporator.

[0007]

Embodiments will be described below with reference to the drawings shown as embodiments. Reference numeral 1 is an evaporator, and 2 is a spiral heat exchanger body, which is used as the evaporator 1. Reference numeral 3 denotes a header portion which extends above the evaporator 1. Reference numeral 4 indicates a steam-generated water surface. Reference numeral 5 denotes a circulation path, one end 5a of which is the water surface 4 for generating steam.
And the spiral heat exchanger body 2 and the other end 5b was connected to the lower end of the evaporator 1. In the evaporator 1 of the circulation path 5, the spiral heat exchanger main body 2 flows through one flow path, and the other flow path is connected to a steam pipe 6 for introducing steam as a heat source from the outside. It is designed to be discharged from the outside. 8 is a steam outlet, 9 is a water supply port, and 10 is a water surface detector.

With the above structure, all the generated steam is taken out from the steam outlet. Since one end of the circulation path 5 is connected below the steam generating water surface 4 and above the spiral heat exchanger body 2, and the other end is connected to the lower end of the evaporator 1,
Natural convection is performed regardless of the surface 4 of steam generation. The water surface detector 10 is used to detect the surface of the steam-generated water, and a signal from the water surface detector 10 automatically controls the water supply from the water supply port 9. Water can be supplied from the water supply port 9.

[0009]

According to the present invention, the water surface for steam generation in the evaporator is the extended upper header portion, and all the steam generated here is taken out from the steam outlet, so that an efficient steam generator is provided. I was able to.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a conventional example.

[Explanation of symbols]

 1 Evaporator 2 Spiral heat exchanger body 3 Header part 4 Water surface for steam generation 5 Circulation path 8 Steam outlet

Claims (1)

[Claims] 1. An upper header part of an evaporator using a spiral heat exchanger body is extended so that a steam generating water surface is located at a high position, and one end is connected between this position and the spiral heat exchanger body. A steam generator having a circulation path having the other end connected to the lower end of the evaporator.