JPS61197953A - Mixing tank for feed water to be supplied into boiler - Google Patents

Abstract

PURPOSE:To collect and discharge substances, contained in feed water and forming scale or the like, by a method wherein the feed water mixing tank is provided with a perforated partitioning plate and a drain valve. CONSTITUTION:In case the partitioning plate 2, having holes 8 is provided at the upper part in the main body 1 of the mixing tank for a boiler or the like for mounting on a vehicle, which is obliged to use unprocessed raw water, most of the scale, sludge or the like, generated in a space below the partitioning plate, is adhered to the inner wall of the space or precipitated. When water feeding pressure is increased, the amount of adhesion is increased, however, the adhered scale is separated from the inner wall and is descended and precipitated at the lower part of the tank when the same pressure is reduced. The scale, sludge or the like, which is precipitated, is removed by opening the automatic drain valve 10 and blowing it to the outside of the tank. Further, the effect of removing the scale may be increased when the partitioning plate 12, having the same configuration as the partitioning plate 2, is provided at the lower position in the rank.

Description

[Detailed Description of the Invention] When operating a boiler, it is inevitable that scale will adhere to its wood pipes, water injection valves, etc., reducing its performance.

The most drastic way to deal with this problem is to treat the water so that scale does not form in the water used. However, this method is completely effective when the boiler is fixed at a fixed location and the boiler is constantly operated at that fixed location, but when the boiler is loaded onto a vehicle or the like and travels from place to place, for example when the boiler is loaded on a railway vehicle. It's a boiler. This boiler was used to generate steam to supply heating to the steam locomotives that have now disappeared, as well as to the passenger cars that are currently being loaded onto diesel locomotives.

In this case, it is not possible to maintain a constant quality of water supply due to economic considerations such as running schedules and water supply facilities.

For example, a diesel locomotive loaded with a steam generator leaving the Yonago locomotive depot will be working between Shimonoseki and Fukuchiyama.In this case, the water supply points will be Izumo, Hamada, Nagato, Shimonoseki, Tottori, Toyooka,
It will be held in Fukuchiyama etc.

Economically, it is not possible to provide equipment and personnel to maintain a constant quality of water supplied to the boilers at such a large number of water supply points. When water quality is constant, the hardness of water when used as boiler water is 9PP! Keep it at 11.

As untreated raw water is supplied to the boiler, scale failure is the biggest cause of boiler failure.

Since the situation described above is the reality, it is not realistically possible to install certain water supply bases and water treatment facilities or take other drastic measures due to economic considerations, and it is difficult to implement untreated water on an ad hoc basis. It is supplied with raw water.

The present invention solves this problem by simply providing a simple partition plate inside the mixing tank currently installed in the boiler and installing a drain valve for discharging scale on the outside of the partition plate, thereby drastically preventing scale buildup inside the boiler. This was done to obtain a positive effect.

To explain it with figures, Figure 1 is a diagram of a mixing tank that supplies water to a steam generator, and a partition plate (2) having a hole (8) provided in this tank and a scale discharge pipe (9).
A vertical mixing tank does not have a drain valve.

Water from the water pump and air water from the continuous blow pipe are combined in this tank and heated to around 100°0, passing through the shaft pipe (5) and the water injection valve (6) before reaching the boiler. . In this case, the impurities contained in the raw water turn into scale and slatch, and due to the eddy movement of the water, they rise inside the mixing tank and reach the boiler.

The present invention has a hole (8) in the upper part of the inside of the mixing tank body (1).
By installing a partition plate (2) with a partition plate (2), most of the scale, scratches, etc. that occur in the space below the partition plate adhere to the inner walls of the space.Theoretically, why did such a serious situation occur? Although it has not been reliably clarified, it is presumed that it actually occurred, but scale scratches etc. on the inner wall of the mixing tank before passing through the hole (8) in the partition plate are caused by the pressure in the space and the space above the partition plate. It is assumed that the theory is that the rise of scale slatch is obstructed by the pressure difference between the two, and the centrifugal force caused by the eddying motion in the space causes scale, slatch, etc. to adhere significantly to the inner wall.

Furthermore, if the water supply pressure increases, the amount of scale that adheres to the inner wall at the bottom of the partition plate will increase, and if the water supply pressure is lowered, the scale that has adhered will peel off from the inner wall and fall to the bottom of the mixing tank. In this case, even if the water supply pressure changes, the amount of scale, slatch, etc. that passes through the partition plate holes will hardly change. When I measured the state in which skenil, slatch, etc. were attached to the space inner seat at the top of the partition plate, there was almost no difference.

You can completely remove scale slatch that has settled on the lower wall of the partition plate or the bottom of the tank by opening the automatic drain valve (to) and blowing it out of the tank before it gets stuck. In this case, blowing can be easily achieved by using steam at a steam pressure of 2 to 3 degrees.

In this way, by simply installing a partition plate with holes inside the mixing tank, we obtained a remarkable effect on scale removal, and when we further installed a partition plate with a similar shape in the lower part of the mixing tank, we obtained an even more effective scale removal effect. It was discovered that the mixing tank had a large size, so two partition plates with holes were installed in the upper and lower parts of the mixing tank to be put into practical use for removing scale slatch and the like.

As described above, a partition plate having holes can be simply provided inside the existing mixing tank by welding or the like.

This is a practical invention that can significantly reduce boiler failures by significantly preventing scale build-up and the like simply by providing a partial drain valve.

Figure 1 (1) shows that the mixing tank body (2) has a partition plate (8) provided at the top of the tank, and a hole (4) provided in a part of the partition plate (8).
) is the space above the partition plate (6) is the water pipe (7) leading to the water injection valve in (6) is the water supply pipe (8) is the air/water supply pipe from the blow pipe (9) is the drain pipe (to) is the drain It is a valve.

(B) is a line representing the movement of thin pressure water in the tank. (2) The shaded area indicates that a partition plate was also provided at the bottom of the mixing tank.

As mentioned above, in the case of a boiler that is not permanently used in a fixed location but is moved to any location for operation, the present invention is essential for preventing scale adhesion when the raw water supplied from the boiler is used without being treated. This is a drastic measure.

It is economically simple to implement and extremely easy to maintain.

[Brief explanation of drawings]

FIG. 1 is an enlarged □□□ surface of a boiler feed water mixing tank showing a specific example of the present invention. kudzu 7jri

Claims (1)

[Claims] A feature is that a partition plate with holes is provided in the water supply mixing tank of the boiler for the purpose of collecting scale-forming substances contained in the water supplied to the boiler in the water supply mixing tank of the boiler and removing them from the tank. A water mixing tank for boilers equipped with a drain valve that discharges scale sludge, etc., that is generated outside the tank.