JPH05321613A - Heat using device and impurity removal device therefor - Google Patents

Abstract

PURPOSE:To effectively remove impurities from a heat medium in a heat using device using dielectric liquid as the heat medium. CONSTITUTION:A heat using device comprising a heat medium evaporator 1, a turbine 3 and a condenser 5 has a heat medium circulating system 8 from which an impurity removal device 23 branches. The device 23 has a moisture removal cylinder 11 and an impurity removal cylinder 10, the moisture removal cylinder 11 removing moisture as an impurity from the heat medium branching from the heat medium circulating system 8, and thereafter the heat medium being led between positive and negative electrodes connected to an d.c. source within the impurity removal cylinder 10 so that ions as an impurity in the heat medium, is separated and attracted to the negative electrode having a positive polarity. The separated impurity ions are eluted again when the power fed to the electrodes in the impurity removal cylinder 10 is cut off after a branch valve 13 is closed, and accordingly, are discharged outside of the system by opening a blow valve 15.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat utilization device using a dielectric liquid as a heat medium, such as an organic medium power generation system and a heat pump using freon as a heat medium, and more particularly to a device for electrically removing impurities from the heat medium. The present invention relates to a heat utilization device.

[0002]

2. Description of the Related Art 1 of heat utilization device using dielectric liquid as heat medium
There is a heat pump type refrigeration system that uses an organic medium power generation system and CFCs, but this organic medium power generation system evaporates the heat medium in the evaporator using waste steam as a heat source and guides it to the turbine to expand the steam. This is a so-called Rankine cycle power generation system in which the turbine is rotated to drive the generator, the heat medium vapor is condensed in the condenser, and then sent to the evaporator by the circulation pump again.

In such a system, the specific fluorocarbon (halogenated fluorocarbon) used as an organic medium is
As is well known, it is considered to be the cause of the ozone layer depletion, and due to an international agreement, it will be completely abolished at the end of this century and production will be banned.

Conventionally, chlorofluorocarbon R11 has been most widely used as a heat medium for a heat pump in an organic medium power generation system or a refrigerator, but since R11 corresponds to a specific chlorofluorocarbon, R123 has been commercialized as an alternative refrigerant.

On the other hand, according to experiments by the present inventors, the alternative refrigerant R123 has a lower electric resistance (conductivity) than the conventional CFC R11. ), There is a risk of increasing the current consumption and causing electric insulation breakdown of the CFC circulation pump (canned pump) directly incorporated in the system.

[0006]

The main causes of the deterioration of the electrical insulation and the increase of the consumption current due to the application of high voltage as the problems relating to the heat medium as described above in the heat utilization device using the dielectric liquid as the heat medium are the refrigerants. Moisture contained in R123,
Impurities and impurities solutes from wetted parts of the device such as a fluorine ion ^{(Fe -, Cl -, Na} -) by removing trace impurities contained in the and the heat medium liquid due, to solve the problem It is possible.

Therefore, the present invention has an object to solve the problems caused by impurities in the heat medium in the heat utilization apparatus using the dielectric liquid as the heat medium.

[0008]

DISCLOSURE OF THE INVENTION The present invention relates to a heat utilization device using a dielectric liquid as a heat medium, which incorporates an impurity removing device equipped with electrodes for applying a high voltage to the heat medium, and which is a contaminated medium separated in the liquid. It is intended to solve the above-mentioned problems by releasing the compound out of the system.

In the impurity removing apparatus according to the present invention, a required number of electrode blocks are formed by keeping a constant gap between the electrode plates of the positive and negative conductors in the flow of the heat medium, and one electrode is provided with a high voltage. Is applied to form an electric field between the electrodes so that the impurity ions in the fluid are adsorbed on the positive electrode plate and separated, and the impurities in the heat medium are separated and removed.

[0010]

As shown in FIG. 3, when a high DC voltage is applied to the dielectric liquid (heat medium), the dielectric liquid causes a self-dissociation action, and the impurity ions 22 are adsorbed and separated on the positive electrode 19 side by an electric force.

In the present invention, by applying this principle, the contaminated heat medium of the solute (impurity) generated from the liquid contact part on the vessel wall in the system is passed through the impurity removing device when the heat medium is filled into the system. It purifies.

When the impurities 22 are dissociated, a dielectric current value corresponding to the electrical characteristics of the pure heat medium is shown, which shows that the impurities 22 are separated and adsorbed to the positive electrode 19 side.

Therefore, when the normal current value is reached, the impurity removing device is disconnected from the heat medium circulating system of the heat utilizing device, and when the DC power supply to the electrodes is turned off, the dissociated impurities are dissolved again in the liquid.

This impurity contaminated medium can be discharged to the outside of the system to remove impurities in the heat medium. Hereinafter, the present invention will be specifically described based on illustrated embodiments.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an organic medium power generation system as a heat utilizing device incorporating an impurity removing device according to the present invention, wherein 1 is an evaporator, in which waste steam or the like is used as a heat source to heat the heating medium. Evaporate. The steam generated in the evaporator 1 is guided to the turbine 3, and the steam expands to rotate the turbine 3 to drive the generator 4.

After that, the vapor of the heat medium is cooled in the condenser 5 by the cooling water supply system 6 and condensed, and is sent to the evaporator 1 again by the heat medium circulation system 8 with the branch valve 9 interposed by the circulation pump 7. Form a so-called Rankine cycle power generation system.

As described above, R123 as a heat medium used in such a system has a problem that the electric insulation is lowered and the current consumption is increased due to impurities contained therein. In the organic medium power generation system shown, an impurity removing device 23 for removing impurities from the heat medium is incorporated.

The impurity removing device 23 is a branch pipe 1 for branching the heat medium from the heat medium circulation system 8 of the organic medium power generation system.
2, a moisture removing cylinder 11 for removing moisture as an impurity from the heat medium, an impurity removing cylinder 10 for removing ions as impurities, and a power supply 1 for supplying a direct current to the impurity removing cylinder.
Have four. In the figure, 13 is a branch valve, and 15 is a blow valve for discharging the heat medium containing impurities from the impurity removal cylinder.

As shown in FIG. 2, the impurity removing cylinder 10 has a steel outer shell in which a rod-shaped or plate-shaped positive electrode 19 and a negative electrode 18 are combined in a required number of electrodes, and both ends of the positive electrode side are made of Teflon or an insulator 17. While being insulated from the negative electrode side by an electric insulator such as, the negative electrode side is connected to the outer shell of the main body and grounded.

The impurity removal cylinder 10 may be cylindrical,
A positive electrode and a negative plate may be alternately arranged in the radial direction. Two water removing cylinders may be provided in parallel and used alternately.

The water removing cylinder 11 connected to the upstream side of the branch conduit 12 in FIG. 1 is an application of a conventional technique (filling a water absorbent with a cylinder), and a detailed description thereof will be omitted.

In the organic medium power generation system thus constructed, when impurities enter the heat medium in the system and the current value does not reach the normal value, the branch valve 13 is opened to remove heat from the heat medium circulation system 8. The heat medium is branched to the impurity removing device 23.

In this state, a DC high voltage is applied to the impurity removing cylinder 10. Impurity ions are adsorbed to the positive electrode side by electric force and separated from the heat medium. After the impurities in the heat medium are adsorbed and separated to the positive electrode side, the branch valve 13 is closed to disconnect the impurity removing device 23 from the heat medium circulating system 8, and the impurity removing cylinder 10 is powered off.

Since the impurities separated on the positive electrode side during the impurity removal operation are dissolved again in the liquid, the blow valve 1
Open 5 and discharge to the outside of the system.

Although one embodiment of the apparatus according to the present invention has been described above, it goes without saying that various modifications may be made to the specific structure of the impurity removing apparatus 23 and the structure of the impurity removing cylinder. For example, as the electrode arrangement of the impurity removal cylinder 10, the positive electrode and the negative electrode may be concentrically arranged in multiple layers.

[0026]

Effects of the Invention As already described, the impurity (F replacement refrigerants R123 accompanying CFCs Tadashiban contained in trace amounts ^_-,
Fe ^_-, Na ^-, Cl ^-, etc.) and Kitashi an effect on changes in electrical properties due to moisture, it had become due for performance degradation and trouble heat utilization system equipment using these media, according to the invention The electric impurity removing device 23 enables the heat medium to be refined while the plant is operating, and contributes to the improvement of the reliability of the entire plant, the reduction of operating cost, and the improvement of performance.

As an example, in a high-performance evaporator using EHD (electrohydrodynamics) technology, the impurities in the heat medium are removed to reduce the EHD consumption current by half, thereby increasing the system thermal efficiency of the entire plant. A large cost reduction can be achieved by making the high performance evaporator originally small and compact.

[Brief description of drawings]

FIG. 1 is a system diagram of an entire heat utilization plant according to a first embodiment of the present invention.

FIG. 2 is a structural view of an impurity removal cylinder used in the apparatus according to the present invention in one embodiment.

FIG. 3 is an explanatory diagram of an impurity removing action in the device according to the present invention.

[Explanation of symbols]

 1 Evaporator 2 Heat Source Supply System 3 Turbine 4 Generator 5 Condenser 6 Cooling Water Supply System 7 Circulation Pump 8 Heat Medium Circulation System 9 Branch Valve 10 Impurity Removal Cylinder 11 Moisture Removal Cylinder 12 Branch Pipeline 13 Branch Valve 14 DC Power Supply 15 Blow Valve 16 Electrode Lead 17 Insulator 18 Negative Plate 19 Positive Electrode 20 EHD Heat Transfer Evaporator 21 EHD Power Supply 22 Impurity Ion 23 Impurity Removal Device

Claims (2)

[Claims] 1. A heat utilizing apparatus using a dielectric liquid as a heat medium, wherein the heat medium circulating system is an impurity removing apparatus for applying a high voltage to the heat medium to electrically separate and remove impurity ions in the heat medium. A heat utilization device characterized in that 2. A dielectric liquid is used as a heat medium, which comprises an impurity removing cylinder in which positive electrodes and negative electrodes are alternately arranged in a radial direction, and a DC power supply device for applying a high voltage to the positive electrodes and negative electrodes. Impurity remover for heat utilization equipment.