DE346874C - Process for generating additional water in steam power plants by evaporating raw water - Google Patents

Description

Process for generating make-up water in steam power plants Evaporation of raw water. In power plants, especially steam turbine plants, is the procurement of the so-called make-up water, d. H. of the water, which as Replacement for the constantly lost quantities of condensate etc. as feed water must be introduced into the cycle, a particularly important task. It is It is necessary that this water is completely pure in order not to disturb the operation to evoke; for this reason one prefers to use distilled water, its However, production must not be too costly in order to ensure the profitability of the Do not influence the system unfavorably.

It is particularly advantageous to use the distilled make-up water in an evaporator that works with a vacuum. In this case you can choose to knock down use the condenser of the power plant, which means that the additional water is unconstrained is introduced into the circuit of the plant. As a heat source for evaporation So far, steam was used, which was supplied to the system from the outside, whereby but there was an increased heat consumption of the entire system.

According to the invention, there is no need to operate the additional water evaporator Heat is supplied from outside, but a heat source is used that is at modern machine systems within the same is available and so far only has been imperfectly and economically exploited. This is the exhaust steam from the steam jet pump, which is supposed to suck the air out of the main condenser.

It is known that a steam jet pump needs very considerable amounts of drive steam, the heat content of which is only used to a small extent, and which is largely lost, although it is also used for preheating the feed water or the like. This large heat source is used according to the invention for the evaporation of raw water for the purpose of supplementing the make-up water. A system designed accordingly is shown in the drawing. It is a a steam turbine, b is the associated surface condenser. The air is sucked out of this by the steam jet pump c. The exhaust steam (with the air) is passed through the evaporator d, which is designed like a tube preheater, flows through its tube bundle and gives off its heat to the raw water, which is fed through the line e. It is advisable to use preheated water for this purpose, e.g. B. part of the warm cooling water emerging from the condenser at f. In order to prevent the accumulation of impurities in the evaporator, excess water is allowed to enter and excess water (possibly with the help of a pump g) is drained off. The vapor enters the condenser b through pipe h , where it is precipitated and thus enters the system's water cycle.

It goes without saying that the condenser cooling surface of such systems increased compared to normal by the area required to precipitate the additional water must become. Only when there is less water is needed you will be measured with one as usual Get along with capacitor. The evaporator can be structurally combined with a preheater when cold raw water is available. Such arrangements are on and known for itself.

Claims (1)

PATENT CLAIM: A method for generating additional water in steam power plants by evaporation of raw water and precipitation of the same in the condenser of the plant itself, characterized in that the steam from the steam jet air pump of the main condenser is used to heat the evaporator.