JPH0726725B2 - Steam separator with water inlet and concentrated water blower - Google Patents

Description

TECHNICAL FIELD The present invention relates to the structure of a steam separator used in a small once-through boiler.

(Prior art) Conventionally, in a small once-through boiler in which the upper header and the lower header are formed in an annular shape, and the upper and lower headers are connected by a large number of water pipes, water is supplied to the lower header and supplied from a steam separator or a precipitation pipe. Generally, concentrated water is blown.

However, in the conventional method, water is supplied to the lower head and at the same time, chemicals are injected for corrosion protection.However, the low temperature water supply slows down the chemical reaction rate, so the corrosion protection effect of chemicals is halved, and low temperature corrosion around the water supply part occurs. There is a problem that pitching occurs.

(Object of the invention) The present invention is intended to solve the problems pointed out in the above-mentioned prior art, and to supply water to a steam separator so that the water temperature rises as soon as water is supplied in order to accelerate the chemical reaction rate. It is an object of the present invention to provide a steam-water separator of a boiler that can be used.

(Means for Achieving the Purpose) As means for achieving the above object of the present invention, a water supply port is provided at the bottom of the steam separator, and a concentrated water blow port is provided at the top of the steam separator to separate the steam. A partition plate and a water flow prevention plate are provided between the water supply port inside the vessel and the concentrated water blow port.

(Operation) In the present invention, when water is supplied to the water supply port at the lower part of the steam separator by the above means, it rapidly mixes with the circulating water at the lower part of the steam separator to become high temperature water, so that the chemical reaction rate is increased and the boiler is heated. The effect of preventing low temperature corrosion and pitting of the main body is obtained. Furthermore, if water is simply supplied to the steam separator, water will be mixed with steam, and unconcentrated water will be mixed with the concentrated water blower. By installing the prevention plate, the separated water that spirals down along the wall surface in the steam separator can go to the lower part, but the water cannot be supplied to the upper part and the concentrated can water in the boiler cannot be supplied. It is possible to blow, and it is possible to obtain the effect that the vapor of high dryness can be stably supplied.

Embodiments Embodiments of the present invention will be described below with reference to the drawings. First
The figure shows the outline of a small once-through boiler, in which a pair of upper and lower annular headers 3 and 4 are arranged respectively, and a large number of water pipes 5, 5, .. Are connected by. The steam separator 2 is connected to the boiler body 1 by a steam communication pipe 6 and a downfall pipe 7. FIG. 2 is an enlarged view of a part of FIG. The concentrated water blow port 9 is provided on the upper part of the steam separator 2, and the lower water supply reaches the upper part between the water supply port 8 inside the steam separator 2 and the concentrated water blow port 9, A circular partition plate (10) for preventing mixing and a rectangular water diversion prevention plate (11) standing on the body are provided at several places.

As the shape of the partition plate 10, a small circular hole may be opened in the center of a circular plate to provide an escape port for deaerated air.

Next, the operation of the illustrated steam separator 2 will be described. Water is supplied to the boiler from the water inlet 8 at the bottom of the steam separator 2, and the circulating water at the bottom of the partition plate 10 inside the steam separator 2 is supplied. It becomes a high temperature by mixing with and is supplied to the boiler body via the downcomer pipe 7. At this time, the supplied water immediately becomes high temperature water, so that the anticorrosion effect of the chemicals can be obtained. Further, by installing the partition plate 10 and the water diversion prevention plate 11, it is possible to prevent the concentrated water on the upper part of the partition plate 10 from being mixed with the feed water, and to prevent the rise of the water level inside the steam separator 2 during water supply. Condensed can water can be blown, and steam with high dryness can be stably supplied.

(Effects of the Invention) Next, the effects of the present invention will be explained. Since the water supply temperature becomes high immediately, the maximum anticorrosion effect by chemicals can be obtained. The dryness can be supplied without mixing the water supply.

[Brief description of drawings]

1 is a schematic sectional view of a small once-through boiler according to an embodiment of the present invention, FIG. 2 is a partially enlarged vertical sectional view of FIG. 1, and FIG. 3 is a II-II transverse sectional view of FIG. . 1 …… Boiler main body 2 …… Steam / water separator 8 …… Water inlet 9 …… Concentration blow port 10 …… Partition plate 11 …… Water prevention plate

Claims (1)

[Claims] 1. A steam-water separator 2 of a boiler, which is connected to a boiler body 1 by a steam communication pipe 6 and a downfall pipe 7 and has a steam supply pipe for taking out steam at an upper part, and a water supply port at a lower part of the steam-water separator 2. 8, the concentrated water blow port 9 is provided on the upper part of the steam / water separator 2, and between the water supply port 8 and the concentrated water blow port 9 inside the steam / water separator 2, the lower water supply reaches the upper part, and the upper concentrated water A steam separator comprising a partition plate (10) for preventing mixing with the water and a water spill prevention plate (11) standing on the body.