JPS5821552B2 - Heat recovery equipment using a cyclone evaporator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a heat recovery device that combines a cyclone evaporator and an indirect contact condenser to recover heat from a fluid containing impurities such as scale components, such as geothermal water or heated industrial wastewater. The purpose is to recover and utilize the retained heat.

An embodiment of the present invention will be described below based on the drawings.

Hot water a containing many impurities passes through a hot water pipe 1 and enters a cyclone evaporator 2.

The steam extraction pipe 3 of the evaporator 2 is connected to an indirect contact condenser 5, and the internal pressure of the cyclone type evaporator 2 is controlled by the indirect contact condenser 5 and the vacuum device 9 connected to the upper part of the hot water a. The temperature is kept lower than the corresponding saturation pressure, so the hot water a self-evaporates inside the cyclone evaporator 2.

FIG. 2 a or b is a cross-sectional view showing an example of the cyclone evaporator 2, in which hot water flows into the body of the cyclone evaporator 2 from the connection direction through the hot water pipe 1. a is given circumferential motion along the inner surface of the barrel.

Therefore, due to the density difference between the vapor and the liquid, the liquid moves circumferentially along the inner surface of the body and accumulates at the bottom of the evaporator 2, and is discharged from the drain pipe 4 as a hot water drain as shown in FIG.

On the other hand, the steam C self-evaporated in the cyclone evaporator 2 flows into the steam extraction pipe 3 and is led to the indirect contact condenser 5.

During this period, the internal pressure of the indirect contact condenser 5 is lower than that of the cyclone evaporator 2 due to the action of the vacuum device 90, so the evaporated C automatically flows to the indirect contact condenser 5.

A heat exchanger tube 6 is disposed inside the indirect contact condenser 5, and clean cold water d to be heated is supplied from a cold water tube 7 connected to one end of the tube, and while passing through the heat exchanger tube 6, a cyclone type evaporator The heat transfer tube 6 is heated by the steam C introduced from the heat exchanger tube 6.
It passes through a hot water pipe 8 connected to the other end and is guided to the utilization system as hot water e.

On the other hand, steam C that heats cold water inside the indirect contact condenser 5 condenses and accumulates at the bottom, and the condensed water f is discharged by the condensate pump 10, but this condensed water f is extracted from the hot water containing impurities. It is pure water and can be used as irrigation water for various species.

Various non-condensable gases that are separated from the hot water and accumulated in the indirect contact condenser 5 are discharged to the outside by the vacuum device 9, thereby preventing deterioration of the heat transfer performance of the heat transfer tubes 6.

Note that the condensate pump 10 can be omitted by keeping the liquid head at the lower part of the indirect contact condenser 5 at a level higher than the position water head required to flow the liquid.

As described above, according to the present invention, retained heat can be extracted from hot water containing impurities such as scale components, such as geothermal water or heated industrial wastewater, and used effectively.

In addition, the internal pressure of the cyclone type evaporator can be maintained lower than the saturation pressure for the temperature of the supplied hot water by the simple extraction contact condenser and the vacuum device connected to it, so the hot water that flows in can be easily self-evaporated. It is possible.

Furthermore, since an indirect contact condenser is used, the hot water obtained by heating can maintain its purity.

[Brief explanation of the drawing]

Fig. 1 is a configuration diagram showing an embodiment of the present invention, Fig. 2 a, b
are cross-sectional views of a cyclone evaporator, respectively. 2...Cyclone evaporator, 5...Indirect contact condenser, 6...Heat transferr, 9...
Vacuum equipment.

Claims (1)

[Claims] 1. A cyclone type evaporator that self-evaporates inflowing hot water and performs gas-liquid separation, and a heat transfer device connected to the cyclone type evaporator, which transfers the steam obtained in the evaporator and the cold water to be heated. 1. A heat recovery device using a cyclone type evaporator, comprising: an indirect contact condenser that obtains hot water by indirect contact via a cyclone evaporator; and a vacuum device connected to the indirect contact condenser.