KR20030042096A - Recycling and fall teperature system for power plant's waste water using seperate heat pipe type heat exchanger - Google Patents

Abstract

PURPOSE: A system is provided to protect ecological system and reduce costs by discharging the waste water of the power plant into the sea after lowering of the temperature of the waste water. CONSTITUTION: A heat recovery unit includes first to third stage heat recovery parts(A,B,C), and the hot water discharged from a power plant is heat exchanged through multiple stages by the heat recovery unit and re-utilized. The temperature of the water is lowered by a hot water radiation unit(D) which is constituted by a separation type heat pipe heat exchanger, and the water is discharged into the sea through a multi-stage radiation structure(E). A plurality of radiation fins are arranged at the outer surfaces of cylindrical bodies, and an evaporator for absorbing heat from the hot water and a condenser for transferring the absorbed heat are arranged independently from each other. The evaporator and the condenser are connected with each other through an evaporated gas connecting pipe and a condensed water connecting pipe. Inlets and outlets of the evaporator and the condenser are communicated with each other so as to form a closed loop for an independent flow of gas and liquid.

Description

Recycling and fall teperature system for power plant's waste water using seperate heat pipe type heat exchanger}

The present invention relates to a separate heat pipe type power plant heat recovery heat exchange and heat exchange system that recovers and recycles the heat of the hot water discharged from a power plant using a heat pipe type heat exchanger, and discharges it by lowering the water temperature. More specifically, by using pressure difference and gravity due to thermodynamic evaporation and condensation without using a separate power source such as a pump, latent heat generated when the working fluid (heat transfer medium) absorbs sensible heat from the evaporator and evaporates and phase changes Condensed water discharged from the condensate is returned and circulated continuously to continuously transfer heat to the water to be heated, thereby recovering and recycling enormous energy from the high-temperature hot water of the discarded power plant. By reducing and releasing the temperature of the A heat pipe (heat pipe, 傳熱 管) of the plant to reduce the costs related to recycling the waste heat recovery and cooling system using the heat exchanger type.

Conventionally, the high temperature and hot water discharged continuously from a power plant such as a nuclear power plant or a thermal power plant is reduced by simply radiating natural convection through a water channel. The hot and hot water of about 7-10 ℃ higher than seawater is transported and discharged to the distant sea through huge water channel or pipes, but this also has a huge management cost and the energy from the waste heat of the hot water is not useful at all. It is a huge situation that wastes energy by being discharged and discarded. In addition, the environmental problems caused by the waste heat of hot water discharged by discarding the above-mentioned hot waste water as it is, that is, the waste heat of the hot waste water changes the water temperature of the surrounding water, and the change of the water temperature is the physical density of the sea water such as the density, viscosity, and gas solubility Changes in most of the properties, and changes in seawater density cause stratification, and thus the transport capacity of rivers and soils due to depletion of fish and shellfish, water pollution, and changes in density and viscosity caused by seawater's dissolved oxygen and salinity distribution. The destruction of ecosystems, such as changes in sedimentation due to the reduction, has been spreading, causing civil complaints of local residents and marine environment destruction due to natural environment changes.

The present invention has been made in order to solve the above-mentioned problems, by recovering a large amount of energy from the hot water of the hot water discharged from the power plant to recycle heat exchange to fresh seawater, underground seawater, groundwater, etc. to effectively reduce the water temperature of the hot water In order to discharge, the latent heat generated when the working fluid (heat transfer medium) absorbs sensible heat from the evaporation part and evaporates and phase changes by using the pressure difference and gravity caused by thermodynamic evaporation and condensation without using a separate power source. Is a separate heat pipe type heat exchanger that continuously transfers heat to the water to be heated by repeatedly repeating the heat exchange process in which condensate discharged and condensed is returned to the water to be heated. The pipe heat exchanger It is aimed to provide a heat recovery recycling and cooling system.

1 is a block diagram showing the overall configuration of the waste heat recovery recycling system of the present invention

2 is an operating principle of the heat pipe applied to the present invention

3 is a configuration diagram of a horizontal fin type heat pipe condenser applied to the present invention

Figure 4 is a block diagram of a horizontal fin type heat pipe condenser applied to the present invention

5 is a block diagram of a vertical fin type heat pipe condenser applied to the present invention

6 is a configuration diagram of a vertical fin type heat pipe evaporator applied to the present invention.

7 is a cross-sectional view of an atmospheric emission type heat pipe condenser applied to the present invention.

8 is a plan view of an atmospheric emission type heat pipe condenser applied to the present invention

9 is a configuration diagram of a separate heat pipe panel applied to the present invention.

10 is a layout diagram of a triangle of a separate heat pipe panel applied to the present invention.

11 is a block diagram of an emission type heat pipe panel applied to the present invention

12 is a triangular layout view of an emission heat pipe panel according to the present invention;

13 is a cross-sectional view showing the location of the evaporator and condenser according to the depth of the warm water

14 is a block diagram of the air discharge coolant spray controller

15 is an operational block diagram of a heat and waste heat recovery and abatement system of the present invention.

<Explanation of symbols for main parts of drawing>

A: First stage heat recovery unit B: Second stage heat recovery unit

C: 3rd stage heat recovery part D: 4th stage warm waste heat dissipation part

E: stage heat dissipation structure

100: Condenser 100 ': Evaporator

104a: evaporator connector 104b: condensed liquid connector

106: working fluid 107a, 107b: vacuum terminal

108a, 108b: Horizontal Heat Dissipation Fins 108c, 108d: Horizontal Heat Dissipation Fins

201: Roof 202: pillar

203: spray nozzle tube 204: support plate

301: sprayer 302: cooling water

400: water pipe 410, 420: support panel

430: Vortex divider 500: Spray controller

510: coolant supply pipe 511: coolant temperature sensor

512: solenoid valve 513: air temperature sensor

520: microprocessor 530: coolant pump

540: communication module 550: system communication line

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention for achieving the above objects will be described in detail with reference to the accompanying drawings as follows. Detailed descriptions of well-known components that may unnecessarily obscure the subject matter of the present invention will be omitted, and like reference numerals refer to like elements. To give.

1 is a schematic view showing the overall configuration according to an embodiment of the present invention, the first stage heat recovery unit (A), the second stage heat recovery to the hot water discharged in large quantities discharged from the power plant using a separate heat pipe heat exchanger Recycle and recycle to seawater and freshwater fish farms or cultivated waters of high-growth plants that must maintain a constant temperature by heat-exchanging with other water in multiple stages in the multi-stage heat recovery section of the (B) and the third stage heat recovery section (B). The hot and cold water is discharged through the underground landfill pipe of unshown farmland as well as the cultivation of the remaining farmland as well as through the wide reservoir to activate the oxygen and microorganisms in the hot water to protect the ecosystem. Natural discharge into the sea through the exit through the heat dissipation unit (D) and the multi-stage heat dissipation structure (E). Configure to

Figure 2 shows the operating principle of the heat pipe type heat exchanger applied in the present invention, the basic principle of the heat pipe heat exchanger using the thermosyphon (Thermo Syphon) material capable of high-density heat transport with a small temperature difference When the working fluid is injected into a closed container as a heat transfer medium (PCM, Phase Changed Material), the working fluid is evaporated by absorbing heat from the evaporator 100 'at the bottom in a vacuum state, and the working fluid 106 in the vapor state is By moving the latent heat of evaporation generated when the phase changes into the condenser 100 due to pressure and density difference, it releases latent heat of high energy and circulates the process of returning condensed water by gravity. By repeating by a large amount of heat transport with a small temperature difference by heating the water to be heated, the present invention is to separate each On the outer circumference of the cylindrical bodies 101 and 102, a plurality of horizontal or vertical heat dissipating fins 108a and 108b are arranged adjacent to each other at regular intervals, so that the heat transfer area is maximized to the lower portion of the sealed cylindrical body. The evaporator 100 ′ absorbing heat from the hot water injecting the working fluid and the condenser 100 transferring the absorbed heat are formed separately from each other, and the evaporator 100 ′ and the evaporator 100 ′ are separated from each other at a predetermined distance. The condenser 100 is connected to the condenser 100 to return the condensate condensed in the condenser 100 and the evaporator gas connection pipe 104a to which the evaporation gas of the working fluid 106 evaporated from the evaporator 100 'is connected. Closed loop (circuit) in which gas 104 is separated and circulated by connecting pipe 104b to the connecting pipe joint 103 by the required length and connecting the inlet and the outlet to both ends of the evaporator 100 'and the condenser 100. As a configuration forming It compressors 100 'and the evaporator 100 is configured by a plurality of parallel, as needed, and the coupling pipe 104 is insulated by heat insulating material to prevent heat exchange with the ambient.

Reference numerals 107a and 107b denote vacuum terminals.

In the split heat pipe type heat exchanger according to the present invention formed as described above, the working fluid 106 located under the evaporator 100 'absorbs heat and evaporates to the top of the evaporator 100', causing a pressure difference to generate an evaporator gas connection pipe ( The condensed water condensed into the liquid state while passing the latent heat (hidden heat) to the condenser 100 and giving out the latent heat through the condenser 100 through 104a) is condensed from the condenser 100 by gravity. 104b), the continuous heat transport takes place in the closed loop. In this process, the surface temperature of the heat dissipation fin 108a rises, and a cyclic circulation of continuous heat exchange occurs to raise the water to be heated, and this configuration is simple and easy to manufacture and install. Its simple and concise structure serves as a high-performance heat recovery device that greatly reduces the weight and volume of the device and reduces the power required for operation. 100 ') and the low temperature condenser 100 far away from the convection with the surrounding air to connect the tube 104 is connected to the pipe joint 103 and then extended and piped to the hot waste heat It can be easily moved to a long distance, and in particular, the heat resistance of the connecting pipe 104 formed of a pipe is small by moving the high-density heat by latent heat, so that even a small temperature difference can recover up to 60-80% of the heat. It is an energy-saving device that can be easily heated even in hot water.

The working fluid 106 may selectively use sodium, mercury, ammonia, etc. according to the use and the operating temperature range, and it is preferable to allow the internal pressure to be close to atmospheric pressure when charging. The inlet of the liquid connecting tube 104b is formed at a lower position with a height difference than the outlet of the evaporating gas connecting tube 104a to be circulated by natural force.

In addition, the conventional heat exchanger has a disadvantage that the apparatus is large because the heat transfer effect is small to increase the heat transfer area, whereas the present invention is a heat dissipation fin to the outer periphery of the body 101, 102 of the evaporator 100 'and the condenser 100 of the cylindrical container Is formed into vertical fins 108c and 108d or horizontal fins 108a and 108b to facilitate the expansion of the heat transfer area.

3 and 4 are views showing the structure of the evaporator 100 'and the condenser 100 in which the horizontal fins 108a and 108b are formed on the outer periphery, and as described above, in the upper portion of the outer periphery of the cylindrical body 101 and 102. Wing-shaped fins 108a and 108b, which are hollow at regular intervals, are attached to the lower portion in multiple stages, and the condensed liquid connecting tube 104b and the evaporating gas connecting tube connecting the evaporator 100 'and the condenser 100 to each other. The connecting tube 104 composed of 104a was insulated with heat insulating material so that the saturated steam rising from the evaporator 100 'to the condenser 100 could reach the condenser 100 without liquefying.

5 and 6 are views showing the structure of the evaporator 100 'and the condenser 100 in which the vertical fins 108c and 108d are formed in the longitudinal direction on the outer circumference of the cylindrical bodies 101 and 102. In order to enlarge, attach the wing-shaped fins 108c and 108d having a hollow interior at intervals of 30 ° to the outer circumference of the cylindrical bodies 101 and 102 and connect the evaporator 100 'and the condenser 100 to each other. The insulator 104 was insulated with insulation so that saturated steam rising from the evaporator 100 'to the condenser 100 could reach the condenser without liquefying.

9 and 10 are the water pipe 400 and the hot water outflow passage of the fluid flow space in a state in which the above-described evaporator 100 'and the condenser 100 of the present invention are spaced apart from each other in combination and connected in parallel. The heat pipe heat exchanger is located in the heat exchanger panel, and the plurality of condenser 100 'and the evaporator 100 are supported by the condenser support panel 410 and the evaporator support panel 420 and heat-insulated. The connecting pipe 104 is connected to the plurality of condenser 100 and the evaporator (100 '), respectively, and the evaporator (100') located in a high temperature hot water inflow and outflow passage that flows out of a power plant or the like recovers heat to recover the working fluid 106. Phase change with gas transfers the latent heat of evaporation to condenser 100 located in the water pipe 400 passageway through which water flows in and out. To be recycled into the planting water. As shown in FIG. 10, the condenser 100 group consisting of a plurality of evaporators 100 'is combined in a multi-row triangular array to give the maximum heat exchange effect with the minimum quantity, and as shown in FIG. The vortex partition 430 is installed in multiple stages according to the flow depth so that energy can be uniformly recovered and discharged in the inflow and outflow line of the hot water drainage passage of the evaporator 100 'located. The present invention is generally useful for the purpose of continuously supplying water at a constant temperature, which is important in terms of effective utilization and economical use of waste resources. The heat pipe type heat exchanger is connected to a system computer not shown in a communication line. The temperature of the hot water, the water, and the cooling water are all checked and analyzed according to the temperature database. If the water is below a certain temperature, the seawater, underground seawater, and ground water are taken out. Heat exchange in the second stage heat recovery unit (B), the third stage heat recovery unit (C) to transfer the heat of the hot water and recycle the heated water in multiple stages as cultivation water for seawater and freshwater fish farms or hot growing plants, respectively.

In addition, by checking the temperature of the hot water discharged as it is not recycled as it is recycled as described above, by constructing the hot water heat dissipation unit (D) with the air discharge type separate heat pipe heat exchanger combined into a plurality of water to reduce the water temperature to utilize as agricultural crop cultivation water for natural farmland As a heat exchanger for discharging to the sea through the heat dissipation structure (E) and through the reservoir, an atmospheric release type separate heat pipe heat exchanger as shown in Figs. 7 and 8 of another embodiment has a plurality of evaporators 100 '. It is a device for reducing the temperature of the effluent discharged by spraying the cold water to the atmosphere by spraying the latent evaporation heat of the hot water from the condenser 100 from the pipe-type spray nozzle pipe 203 is formed with the injection hole 301, which is The condenser 100 is placed in a support plate 204 mounted on a structure constructed of a roof 201 that blocks direct sunlight and a pillar 202 supporting it. And spray cool water to the condenser 100 through the spray nozzle tube 203 in which the injection hole 301 is formed to the pipe surrounding the condenser 100, and from the evaporator 100 'through the evaporator gas connecting pipe 104a. The system communicates with the system management program embedded in the system computer as shown in FIG. 14 as it releases the latent heat of the warmed up water and the condensed water is returned to the condensed liquid connecting pipe 104b to release heat to the atmosphere quickly and in large quantities. The condenser spray controller 500 connected to the line 550 communicates with the computer through the communication module 540 to monitor the ambient temperature and the temperature of the coolant detected by the ambient temperature sensor 513 and the coolant temperature sensor 511. Comparative analysis by the microprocessor 520 operates the coolant pump 530 and controls the opening and closing of the cooling water supplied to the cooling water supply pipe 510 by the opening and closing solenoid valve 512.

That is, the above air-emitting heat pipe heat exchanger is provided with a plurality of condensers 100 on the condenser support panel 410 exposed to the atmosphere of the ground and the condenser 100 and the evaporator (100 ') located in the hot water discharge passage; Insulated pipes are separated by the insulated evaporation gas connecting pipe 104a and the condensed liquid connecting pipe 104b to perform heat exchange, and are controlled by a coolant supply controller 500 connected to the system computer. 512) to appropriately distribute the spray water supply to reduce the temperature of the discharged water.

Referring to the operation of the present invention as described above is as follows.

15 is a flow chart showing the operation between the system and the apparatus of the present invention, when the system is running, it checks the temperature of the hot water, the water and the cooling water, and uses the first stage seawater use and the second stage underground seawater use by the temperature database. Check the temperature of each ground water use, analyze the proper supply temperature and flow rate, adjust the supply volume, exchange the hot water backwater with water that requires a constant temperature, recycle it, and discharge the hot water that is not recycled. While checking the heat dissipation amount and repeating the process of supplying the cooling water, the hot water with reduced water temperature on natural farmland is used as cultivation water and discharged to the sea.The generated database is saved and updated, and then proceeds to printouts such as reports. Report and document the situation.

The present invention described above is not limited to the above-described embodiment as various substitutions and changes can be made by those skilled in the art without departing from the technical spirit of the present invention.

Power plant discharge hot water wastewater recycling and cooling system using a separate heat pipe heat exchanger of the present invention as described above, the heat transfer of the hot water discharged from the power plant to the other water without any external power to recover the enormously discarded energy It is a very useful invention to reduce the cost of restoring the ecosystem and restoring it by discharging it to the sea by recycling and lowering the water temperature of the hot water.

Claims (4)

Horizontal fins 108a and 108b or vertical fins 108c and 108d are formed on the outer periphery of the cylindrical bodies 101 and 102 and the working fluid 106 in the evaporator 100 'absorbs heat and evaporates. Through the evaporation gas connecting pipe 104a, the upper part of the condenser 100 is raised to transfer the latent heat of evaporation (hidden heat) to the condenser 100, and the condensed water descends through the condensed liquid connecting pipe 104b by gravity to carry out heat transportation. In a waste heat recovery system provided with a plurality of heat pipe type heat exchangers for heating a heating body, a first stage heat recovery unit (A), a second stage heat recovery unit (B), and a third stage heat recovery unit are configured to supply high temperature warm water discharged from a power plant. Heat is recovered from the multi-stage heat recovery section and heat-exchanged with other heat in a multi-stage heat pipe type heat exchanger, and the discharged hot water is discharged from the hot water heat dissipation unit (D) consisting of an atmospheric discharge type heat pipe heat exchanger. At low temperature Waste heat recovery recycling and cooling system for power plant effluent hot and cold drainage using split type heat pipe heat exchanger, characterized by natural discharge to the sea through multi-stage heat dissipation structure (E) The method according to claim 1, wherein the atmospheric release type heat pipe heat exchanger is a condenser 100 is placed on a support plate 204 mounted on a structure constructed of a roof 201 and a column 202 supporting the direct sunlight to block the direct sunlight Hot water discharged from the evaporator 100 'through the evaporation gas connecting pipe 104a by spraying cold water into the condenser 100 through the spray nozzle tube 203 in which the injection hole 301 is formed as a pipe surrounding the condenser 100. Waste heat recovery recycling and cooling system of power plant effluent hot water drainage using split type heat pipe heat exchanger The heat pipe type heat exchanger is formed such that the inlet of the condensed liquid connecting pipe (104b) is located at a lower position with a height difference than that of the outlet of the evaporating gas connecting pipe (104a). Waste heat recovery recycling and cooling system for power plant effluent hot and cold wastewater using a separate heat pipe heat exchanger, characterized in that it forms a closed loop (circuit) to transfer heat without being mixed. The heat pipe type heat exchanger according to claim 1, wherein the heat pipe type heat exchanger has a plurality of horizontal or vertical fins 108a (outer periphery) of the evaporator 100 'and the cylindrical bodies 101 and 102 of the condenser 100. Waste heat recovery recycling and cooling system of the power plant effluent hot and cold water drainage using a separate heat pipe heat exchanger by arranging 108b) adjacent to each other at a predetermined interval to maximize the heat transfer area.