JPS5844955B2 - Heat recovery equipment using a cyclone type gas-liquid separation evaporator - Google Patents

Description

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

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 type gas-liquid separation evaporator 2.

The vapor extraction pipe 3 of the gas-liquid separation evaporator 2 is connected to a direct contact condenser 5.
connected to the lower part of the cyclone type gas-liquid separation evaporator 2
The internal pressure of the hot water a is kept lower than the saturation pressure corresponding to the temperature of the hot water a by the direct contact condenser 5 and the vacuum device 9 connected to the upper part of the direct contact condenser 5. It self-evaporates inside the evaporator 2.

FIG. 2 a or b is a cross-sectional view showing an example of the cyclone type gas-liquid separation evaporator 2. The inflowing hot water a is given a circumferential motion along the inner surface of the body.

Therefore, due to the difference in density between the vapor and the liquid, the liquid moves circumferentially along the inner surface of the body and accumulates at the bottom of the vapor-liquid separation 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 type gas-liquid separation evaporator 2 flows into the steam extraction pipe 3 and is led to the lower part of the direct contact condenser 5.

During this period, the internal pressure of the direct contact condenser 5 is lower than the internal pressure of the cyclone type gas-liquid separation evaporator 2 due to the action of the vacuum device 9, so the vapor C automatically flows toward the direct contact condenser 5.

A plurality of baffle plates 6 are disposed inside the direct contact condenser 5, and clean cold water d to be heated is supplied from the top thereof through a cold water pipe 7.

Therefore, while the cold water d falls through the baffle plate 6 in the form of a liquid column or droplets inside the direct contact condenser 5, it comes into direct contact with the vapor C introduced from the cyclone type gas-liquid separation evaporator 2 and is heated. At the same time, vapor C is condensed and collected at the bottom.

The falling time of the liquid at this time is set by designing the number of stages of the baffle plate 6 so that the baffle plate 6 provides optimum performance.

On the other hand, since the inside of the direct contact condenser 5 is degassed by the vacuum device 9, non-condensable gases etc. may accumulate in the direct contact condenser 5.
This prevents deterioration of the heat transfer performance within.

A position head pipe 8 is attached to the bottom of the direct contact condenser 5 to keep the liquid head above the position head required for flowing the liquid,
The hot water e accumulated in the direct contact condenser 5 is sent to the utilization system without using a pump or other pressure feeding device.

FIG. 3 shows a system with a two-stage configuration.

In order to further utilize the hot water b1 discharged from the waste hot water pipe 4a as waste hot water in the first stage cyclone type gas-liquid separation evaporator 2a, it flows into the second stage cyclone type gas-liquid separation evaporator 2b, where 1 Self-evaporation and gas-liquid separation are performed at the same time as in the second stage, and the liquid accumulated at the bottom of the gas-liquid separation evaporator 2b is discharged from the drain pipe 4b as waste hot water b2.

The steam c2 self-evaporated in this cyclone type gas-liquid separation evaporator 2b is transferred from the steam extraction pipe 3b to the first stage direct contact condenser 5.
The clean cold water d introduced into the lower part of the pipe a and supplied to the upper part through the cold water pipe 1 comes into direct contact with the cold water d while falling through the baffle plate 6a, heating and condensing the cold water d, thereby producing warmed cold water. The water is mixed with water and collected at the bottom of the direct contact condenser 5a, and is supplied as hot water el to the upper part of the second stage direct contact condenser 5b through the water head pipe 8a.

The steam c1 self-evaporated in the first-stage cyclone gas-liquid separation evaporator 2a is introduced into the lower part of the second-stage direct contact condenser 5b through the steam extraction pipe 3a, and is introduced into the lower part of the second-stage direct contact condenser 5b, and similarly to the first stage, the baffle plate 6b It comes into direct contact with the hot water e1 falling between them, heats it, condenses it, and collects at the bottom.

The high-temperature water e2 accumulated at the bottom is flowed to the utilization system through the position water head pipe 8b attached to the bottom without using a pressure feeding device such as a pump.

A vacuum device 9 is connected to the upper part of the direct contact condensers 5a and 5b via valves 10a and 10b, and by operating the valves loa and 10b, the direct contact condenser 5a and the cyclone type gas-liquid separation evaporator 2a are The internal pressure is lower than the internal pressure of the direct contact condenser 5b and the cyclone type gas-liquid separation evaporator 2a, but since the bottom of the direct contact condenser 5a and the top of the direct contact condenser 5b are connected by a water head pipe 8a, Direct contact condenser 5a without using a pressure feeding device such as a pump
The bottom hot water e1 can be led to the top of the direct contact condenser 5b.

In each of the above embodiments, the cyclone type gas-liquid separation evaporator and the direct contact condenser are arranged as separate units and are connected by piping, but the piping can be omitted and they can be integrated.

As described above, according to the present invention, retained heat can be extracted and effectively used from hot water containing impurities such as scale components such as geothermal water or industrial heated wastewater, and it is also possible to effectively use the retained heat of geothermal water or hot water containing impurities such as scale components. Since the internal pressure can be maintained lower than the saturation pressure with respect to the temperature of the supplied hot water by the direct contact condenser and the vacuum device connected thereto, it is possible to easily self-evaporate the inflowed hot water.

Furthermore, since a direct contact condenser is used, heat exchange between the supplied cold water and steam can be performed efficiently.

[Brief explanation of the drawing]

Fig. 1 is a configuration diagram showing an embodiment of the present invention, Fig. 2 a, b
3 is a cross-sectional view of a cyclone type gas-liquid separation evaporator, and FIG. 3 is a configuration diagram showing another embodiment. 2.2a, 2b...Cyclone type gas-liquid separation evaporator, 5.5a, 5b...Direct contact condenser, 8,
8a8b...Position water head tube, 9...Vacuum device.

Claims (1)

[Scope of Claims] 1. A cyclone-type gas-liquid separation evaporator that self-evaporates inflowing hot water and performs gas-liquid separation; A cyclone type gas-liquid separation comprising: a direct contact condenser for obtaining hot water by bringing the obtained steam into direct contact with cold water to be heated; and a vacuum device connected to the direct contact condenser. Heat recovery device 2 using an evaporator The hot water obtained in the direct contact condenser is flowed through a water head pipe provided at the bottom of the direct contact condenser. A heat recovery device using the cyclone type gas-liquid separation evaporator described above.