KR20130100408A - Hot water circulation system through recovery of waste heat with spiral water heating pipeline attached to the inner wall of chimney and 3-water-tank type non-powered pressurising means - Google Patents

Abstract

PURPOSE: A spiral water heating pipeline attached in an inner wall of a chimney and a hot water circulating system by collecting the waste water including a non-power pressurizing member in a triple water tank type are provided to generate hot water by efficiently collecting water heat of gas discharged through the chimney of a coal fired boiler in a factory and to save the energy by circulating the generated water in a heating plate using a non-power pressurizing member. CONSTITUTION: A hot water circulating system comprises a coal fired boiler (10), a chimney (20), a water heating pipe pipeline (30), a triple water tank type non-power pressurizing member (40), a hot water supply pipe (50), a heating plate (60), and a collecting water pipe (70). The triple water tank type non-power pressurizing member comprises a steam tank (42), a hot water tank (44), and a supplemental water tank (46). The supplemental water tank is equipped on the upper part of the steam tank, supplies the water to an entrance of the heating pipe pipeline, and supplies supplemental water in the steam tank when the pressure of the steam tank is lower than the predetermined pressure. A hot water circulating pipe is buried inside the heating plate in which is heated by the circulation of the hot water supplied from the hot water supply pipe. The collecting water pipe collects the water at lower temperatures cooled after being circulated by the hot water circulating pipe of the heating plate. [Reference numerals] (10) Coal boiler; (44,BB) Hot water; (46) Supplemental water; (AA) Low temperature water

Description

HOT WATER CIRCULATION SYSTEM THROUGH RECOVERY OF WASTE HEAT WITH SPIRAL WATER HEATING PIPELINE ATTACHED TO THE INNER WALL OF CHIMNEY AND 3-WATER- TANK TYPE NON-POWERED PRESSURISING MEANS}

The present invention relates to a hot water circulation system, and more particularly, by attaching a spiral heat pipe to the coal boiler communication to recover the waste heat of the gas discharged through the communication to generate hot water, and the generated hot water as a non-power pressurization means. It relates to a hot water circulation system to pressurize and circulate ondol.

In general, coal is the most consumed fossil fuel for industrial energy along with oil. As the coal is burned in the coal boiler, the energy required to operate the plant is obtained, and the gas generated after the combustion of the coal is discharged to the outside through the communication. As the gas discharged through the communication includes heat of high temperature, many attempts have been made to recover and recover such waste heat.

On the other hand, coal is generally made in the form of fine powder, and most of the coal is transported to a factory and then stored in a coal reservoir installed around a coal boiler or consumed while being stored for a considerable period of time after being unloaded in a space around a boiler without a separate reservoir.

However, as described above, the coal stored in a separate reservoir or stored in the space around the boiler is exposed to the outside air, and since the coal is in the form of fine powder, it is rainy season like rainy season, geographically rainy areas, coastal areas and In case of long-term storage of coal in the air, such as in humid areas such as Southeast Asia, the coal absorbs moisture and is easily wetted, and the wet coal has a combustion efficiency due to latent heat required for evaporation of moisture during combustion. This leads to a 20% increase in fuel costs and a 30% increase in combustion waste.

Currently, most plants have no facilities for reducing the humidity of coal, and measures to prevent the reduction of combustion efficiency and energy waste due to the wetting of coal in a wet or wet area are required. In particular, this problem is more severe in Southeast Asia, where the climate has a long rainy season and high humidity. Therefore, it is expected to create value added through the development and export of these facilities.

As mentioned above, the gas discharged through the coal boiler communication includes a high temperature of heat, so it may be possible to reduce the humidity of the coal by recovering the waste heat of the communication exhaust gas. Conventionally, there has been disclosed a technique for recovering and recycling waste heat of flue gas from Korea Patent Publication No. 2000-0026279 or Republic of Korea Patent Registration No. 10-0561975, but the technique is applied to a system for drying and storing coal using the same. Not only is there a problem, but the application of the waste heat recovery from the flue gas is not good, there is a limit in its application, it is required to develop a system that is excellent in waste heat recovery efficiency and meets the purpose of coal drying.

The present invention was devised to solve problems such as a reduction in combustion efficiency caused by the coal storage method in the wet area as described above, and recovers the waste heat of the gas discharged through the coal boiler communication of the plant effectively to recover the hot water. It is an object of the present invention to provide a hot water circulation system that can generate and store dry coal through circulation of the generated hot water.

Hot water circulation system according to the present invention as described above, the coal boiler for burning coal; A communication unit for discharging combustion gas generated from the coal boiler; A pipe for heating the water flowing inside by heat exchange with the waste heat of the gas discharged through the communication, it is inserted into the communication through the outer wall of the communication from the outside of the communication after being wound and attached spirally along the communication inner wall A heat receiving pipe passage configured to be led out again through the outer wall of the communication; It is for discharging the hot water discharged from the heat receiving pipe by a non-powered, the steam pipe is connected to the outlet side of the heat receiving pipe filled with water vapor generated from the hot water, and is provided in the lower portion of the steam pipe is in communication with the steam pipe It is provided in the hot water tank filled with the introduced hot water filled by gravity, and the upper part of the steam container to supply water to the inlet side of the heat receiving pipe, when the pressure of the steam container falls below the set pressure to replenish the steam container A triple water bottle type non-power pressurizing means having a supplement water bottle for supplying water; A hot water supply pipe connected to the hot water tank of the non-power pressurizing means to discharge hot water filled in the hot water tank; A hot plate circulating therein and an ondol plate heated in circulation of hot water supplied from the hot water supply pipe; And a return pipe for returning the cooled low temperature water circulated through the hot water circulation pipe of the ondol plate to the replenishing water bottle.

Here, it is preferable that the waste heat recovery wings protrude from the outer circumferential surface of the heat receiving pipe to increase the contact area with the gas discharged through the communication and the residence time of the gas.

In addition, the waste heat recovery wing is formed to protrude at an interval of 90 degrees on the outer circumferential surface of the heat receiving pipe, it is preferable to extend along the longitudinal direction of the heat receiving pipe.

In order to increase the residence time of the gas discharged through the communication, the annular heat shield plate configured to have an annular plate shape in which the center part is opened so that the gas passes therethrough is installed above the heat receiving pipe passage.

When the steam pressure of the steam inside the steam container is above a predetermined pressure, the non-power pressurizing means pressurizes the hot water in the hot water tank by the steam pressure to discharge the hot water into the hot water supply pipe, and when the steam pressure of the steam inside the steam box is less than the predetermined pressure, the steam pressure. And pressurize the hot water in the hot water tank by the pressure of the replenishment water supplied from the upper water supply tank of the steam container and discharge the hot water into the hot water supply pipe.

Here, a communication hole is formed between the steam tank and the hot water tank of the non-power pressurizing means so that the hot water introduced into the steam tank is discharged to the hot water tank, and a supplement water pipe is connected between the steam tank and the supplement water tank, and the steam tank is connected to the supplement water pipe. When the steam pressure of the internal steam is less than a certain pressure is provided with a check valve that opens to supply the replenishment water from the refill bottle to the steam bottle.

In addition, the steam cylinder of the non-power pressurizing means is provided with a pressure regulator for exhausting the steam to the outside when the steam pressure of the steam inside the steam tank rises above a predetermined pressure.

According to the present invention as described above, by collecting the waste heat of the gas discharged through the coal boiler communication of the factory to generate hot water, and to obtain the energy saving effect by circulating the generated hot water to the ondol plate using a non-powered press means It can be stored while drying the coal on the ondol plate can increase the thermal efficiency of the coal.

1 is a schematic diagram of a hot water circulation system according to the present invention;
2 is a block diagram of a heat receiving pipe of a hot water circulation system according to the present invention;
3 is a view showing a detailed configuration of the non-powered pressurization means of the hot water circulation system according to the present invention.

Hereinafter, with reference to the accompanying drawings and the preferred embodiment of the configuration and summary of the hot water circulation system according to the present invention will be described in detail.

As shown in Figure 1, the hot water circulation system according to the present invention is a coal boiler 10, communication 20, heat pipe 30, waste heat recovery wing 32, non-powered press means 40, hot water supply pipe ( 50), the ondol plate 60, the return pipe 70 is included.

The coal boiler 10 is a kind of combustion chamber for burning energy to obtain energy required for plant operation, and the communication 20 is a passage through which the combustion gas generated after the combustion of coal in the coal boiler is discharged to the outside. Through the communication 20, various filters are installed so that the exhaust gas from which contaminants have been removed is raised with a predetermined pressure by a blower fan and discharged to the outside, and the exhaust gas is heated and heated by high heat generated during combustion. Maintaining the temperature.

The heat receiving pipe path 30 is a heat exchange pipe for heating the water flowing therein by heat exchange with the waste heat of the gas discharged through the communication 20, and penetrates the outer wall of one side of the communication 20 from the outside of the communication 20 After being inserted into the communication 20, the spiral is wound around the inner wall of the communication 20 and attached upwardly, and is configured to be pulled out through the outer wall of the communication 20 again. That is, the heat receiving pipe line 30 is located at the inlet side (A) and the outlet side (B) at the top. The heat receiving pipe path 30 may be configured in a spiral contacting the communication inner wall, but the diameter of the spiral is small and the upper part is formed large, or as shown in FIG. 1, so that the lower part is narrow and becomes narrower toward the upper part and then widens again. It is preferred to be configured. As such, when the diameter of the spiral is small and the upper portion is large, the communication discharge gas is introduced through the wide space between the communication and the lower part of the heat pipe line, and then the space between the communication and the heat pipe line is narrowed at the upper part and thus is not easily discharged. In addition, the residence time is long, which can increase the heat recovery rate.

The inlet side (side inserted into the communication 20) of the heat receiving pipe 30 (A) is connected to the supplementary water tank 46 of the non-powered pressurization means 40 to be described later to exchange heat with the exhaust gas communication 20 Water is supplied to generate hot water. On the other hand, the hot water generated by the heat exchange is discharged to the outlet side (B) of the heat receiving pipe 30 and the steam cylinder 42 of the non-powered pressurization means 40 to be described later is connected.

2 illustrates a state in which the spiral heat pipe 30 is mounted on the communication 20 in more detail. As shown, the spiral heat pipe line 30 is attached to the inner wall of the communication 20, can be directly welded to the inner wall of the communication 20 or attached by a separate bracket or fixture.

On the other hand, it is preferable that the waste heat recovery wing 32 is provided on the outer circumferential surface of the heat receiving pipe (30). The waste heat recovery wing 32 is formed to protrude at an interval of 90 ° on the outer circumferential surface of the heat receiving pipe line 30, as can be seen from the AA 'cross section of the heat receiving pipe line 30, and extends along the longitudinal direction of the heat receiving pipe line 30. Is formed. The waste heat recovery wing 32 is a means for increasing the waste heat recovery efficiency by widening the contact area with the communication gas (20) discharge gas and causing a vortex of the discharge gas to increase the residence time.

On the other hand, it is preferable that the annular heat shield plate 34 is additionally installed above the heat receiving pipe path 30 in the communication 20. The annular heat shield plate 34 is provided above the heat receiving pipe line 30 in the communication 20 to increase the residence time of the gas discharged through the communication 20, as shown in FIG. 2. The central portion is configured in the form of an annular plate opened to allow gas to pass through and to be discharged to the outside. And, the edge of the annular heat shield plate 34 is welded to the inner wall of the communication 20 or fixedly coupled by a separate fixture. Due to the annular heat shield plate 34, the gas discharged through the communication 20 is stagnant and the waste heat remaining in the gas is longer in the lower side of the heat shield plate. It can be recovered.

On the other hand, the outer surface of the waste heat recovery wing 32 and the heat receiving pipe 30 is preferably coated with a black body paint having excellent heat absorption rate. Due to the black body paint, the waste heat of the flue gas 20 can be recovered more through the waste heat recovery wing 32 and the heat receiving pipe 30.

According to this structure, the waste heat of the gas discharged through the communication 20 is recovered and the water flowing inside the heat receiving pipe line 30 is heated to generate hot water. The generated hot water is discharged to the outlet side B of the heat receiving pipe line 30 and is pressurized by the non-powered pressurizing means 40 and discharged at a predetermined pressure through the hot water supply pipe 50.

The non-power pressurizing means 40 is a means for pressurizing and discharging only pure water except water vapor from the hot water discharged from the heat receiving pipe 30 at a predetermined pressure, and a more specific configuration is shown in FIG. 3. As shown, the non-powered pressurizing means 40 is a steam container 42 connected to the outlet side of the heat receiving pipe 30, a hot water tank 44 directly connected to the lower portion of the steam container 42, and the steam It is provided in the upper part of the barrel 42, and consists of a triple barrel type provided with the supplementary canister 46 connected to the inlet side of the heat receiving line 30. The non-powered pressing means 40 is preferably one surface is concave curved to be attached to the outer peripheral surface of the communication (20).

The steam cylinder 42 of the non-power pressurizing means 40 is connected to the outlet side of the heat receiving pipe 30, the hot water flows in, but because the water vapor is small, the steam rises in the steam tank 42 and moves upwards, Pure hot water moves to the lower part of the steam container 42 by gravity. As such, steam and hot water are primarily separated from the steam container 42 by the difference in specific gravity and gravity.

The lower portion of the steam tank 42 is provided with a hot water tank 44, the communication hole 44a is formed between the steam tank 42 and the hot water tank 44. Accordingly, the hot water introduced into the steam container 42 is moved downward by gravity and then flows into the hot water tank 44 below the steam container 42 through the communication hole 44a.

The hot water introduced into the hot water tank 44 is pressurized by various forces and discharged to the outside. First, the hot water is pressurized by the steam pressure inside the steam container 42. As described above, the steam container 42 is filled with steam, and if the hot water is continuously introduced, the pressure of the steam, that is, the steam pressure increases as the amount of steam increases. When the steam pressure increases, water vapor in the steam container 42 pressurizes the hot water inside the hot water tank 44 through the communication hole 44a. Accordingly, the hot water in the hot water tank 44 is discharged to the outside through the hot water supply pipe (50).

However, if the steam pressure in the steam container 42 continuously increases to exceed the capacity of the steam container 42, there is a risk that the explosion or breakage of the steam container 42 occurs. In order to prevent this, the steam barrel 42 is preferably provided with a pressure regulator 43. The pressure regulator 43 is a type of vent valve (VENT VALV). When the steam pressure in the steam tank 42 reaches a preset pressure, the pressure regulator 43 forcibly evacuates the water vapor inside the steam tank 42 to the outside. By lowering the pressure inside, it is possible to prevent a risk such as explosion of the steam container 42. On the other hand, the water vapor forcedly exhausted through the pressure regulator 43 is recovered to the replenishing water tank 46 through the steam recovery pipe 43a, and then condensed into water.

On the other hand, when the amount of water vapor in the steam container 42 is small, the steam pressure is small so that steam does not effectively pressurize the hot water. Accordingly, hot water discharge inside the hot water tank 44 may not be smooth. In this case, the replenishment water flows into the steam container 42 from the refill container 46 provided above the steam container 42, and the hot water in the hot water container 44 is pressurized and discharged by the pressure and the steam pressure of the refill water. Can be. To this end, it is preferable that a check valve is installed between the steam container 42 and the supplementary water container 46 of the upper layer. As shown in FIG. 3, the steam container 42 and the supplemental water container 46 thereon are spaced apart at regular intervals, and the supplementary water is supplied from the supplement water container 46 to the steam container 42 therebetween. The supplementary water pipe 48 is formed, and the supplementary water pipe 48 is preferably provided with a check valve. The check valve is preferably a conventional inline check valve having a valve body 48a and a spring 48b as shown inside the circle.

Through such a configuration, when the vapor pressure in the steam container 42 is low, the valve body 48a naturally moves downward due to the pressure of the replenishing water in the replenishing container 46, and the replenishing water vapors through the replenishing water pipe 48. It flows into the barrel 42. Accordingly, the pressure of the supplementary water introduced into the steam container 42 and the original steam pressure inside the steam container 42 are combined to increase the pressure, so that hot water in the hot water tank 44 is smoothly discharged through the hot water supply pipe 50. Will be.

In the above, the pressure regulator 43 and the check valve are configured to be opened and closed automatically according to the steam pressure in the steam container 42, but the first pressure sensor P1 is installed in the steam container 42, and the pressure regulator 43 is provided. And a solenoid valve in place of the check valve, the first pressure sensor P1 detects the steam pressure inside the steam tank 42 in real time, and opens the solenoid valve installed in the steam tank 42 when the detected steam pressure is equal to or higher than a set value. And exhaust the steam, and if the detected steam pressure is less than the set value, the steam pressure inside the steam tank 42 by supplying the replenishment water by opening the solenoid valve installed between the steam tank 42 and the supplement water tank 46. It is desirable to maintain the temperature at a temperature suitable for hot water circulation at all times.

On the other hand, the hot water undergoes a bottleneck phenomenon passing through the relatively narrow communication hole (44a) when moving from the steam tank 42 to the hot water tank 44, and the pressure is instantaneously increased while falling to the lower tank by gravity Ejected at high pressure. This pressure is also added so that hot water in the hot water tank 44 is smoothly discharged through the hot water supply pipe 50.

As described above, the non-power pressurizing device 40 pressurizes and discharges hot water by using steam pressure, supplemental water pressure, gravity, and the like, and thus does not require a separate power supply, thereby achieving an energy saving effect.

The hot water pressurized through the non-power pressurizing means 40 is supplied to the ondol plate 60 through the hot water supply pipe 50. Ondol plate 60 refers to a Korean-type heating device that fires a fire in the combustion engine to heat a portion past the floor, the bottom is mainly made of stone, in recent years to pour concrete pipes after laying hot water pipes inside, the hot water Hot water boiler-type ondol which circulates hot water through the pipe is mainly used. In the present invention, the hot water supplied through the hot water supply pipe 50 is supplied to the ondol plate 60 is embedded with the hot water circulation pipe. The ondol plate 60 may be fixedly installed on the ground, a plurality of ondol plates 60 formed in a predetermined standard in the same form as the hot water mat may be connected to the assembly. Coal containing moisture is loaded on the ondol plate 60, and the coal is dried by a temperature plate heated by hot water. The hot water supplied to the ondol plate 60 is circulated through the hot water circulation pipe to heat the ondol plate 60, cooled to a low temperature, and returned to the hydrothermal pipe line 30 through the return pipe 70.

The cold water returned to the heat receiving pipe line 30 through the return pipe 70 is returned to the supplement water bottle 46 of the non-powered pressurizing means 40. The low temperature water is returned by the pressure generated from the non-power pressurizing means 40. In this case, in order to prevent the low temperature of the low pressure water from being returned smoothly, a separate pump is provided in the return pipe 70. It is preferable that 80 is provided.

So far, the schematic configuration of the hot water circulation system according to the present invention has been described. Hereinafter, a preferred embodiment for automatically controlling the hot water circulation system having the above configuration will be described.

As shown in FIG. 1, according to a preferred embodiment of the present invention, the first solenoid valve S1 is provided at the inlet side of the heat receiving pipe 30, and the first temperature sensor T1 and the first outlet valve are provided at the outlet side. Two solenoid valve (S2) is provided, the hot water supply pipe 50 is provided with a second pressure sensor (P2) and the second temperature sensor (T2), one side is provided with a controller 100 for automatically controlling the entire system. do. Hereinafter, the automatic control method of the hot water circulation system which has such a structure is demonstrated.

First, the water supplied through the replenishing water tank 46 of the non-power pressing means 40 is supplied to the inlet side (A) of the heat receiving pipe (30). The supplied water is heated by the waste heat of the exhaust gas while passing through the heat receiving pipe line 30 spirally disposed in the communication 20, and discharged to the outlet side B of the heat receiving pipe path 30. At this time, the first temperature sensor (T1) provided on the outlet side of the heat receiving pipe 30 senses the temperature of the water discharged from the heat receiving pipe (30). As a result of the detection, when the temperature of the water is lower than the preset temperature suitable for drying coal, a signal is transmitted to the controller 100, and the controller 100 transmits a signal to the second solenoid valve installed at the outlet side of the heat receiving pipe 30. S2) and the first solenoid valve (S1) installed on the inlet side to close the water in the communication heat pipe 30 to temporarily stagnate so that the water is heated to a high temperature. When the water warms up to reach a preset temperature, the first solenoid valve S1 and the second solenoid valve S2 are opened and transferred to the non-power pressurizing means 40 through the outlet side of the heat receiving pipe 30.

Water introduced into the steam cylinder 42 of the non-power pressurizing means 40 is steam because the high temperature exceeds 100 ℃. In the steam container 42 of the non-powered press means 40, water vapor and hot water are separated from each other. As shown in FIG. 1, when hot water flows into the steam container 42, water vapor rises to the top and hot water falls to the bottom by gravity. Since the steam container 42 is connected to the hot water tank 44 at the lower portion, only the hot water moves to the hot water tank 44, and the hot water is pressurized by steam pressure, gravity, supplemental water pressure, and the like, and is discharged to the hot water supply pipe 50. On the other hand, the steam in the steam tank 42 is gathered in the upper layer over time and condensed into water and is discharged with hot water.

The hot water discharged through the hot water supply pipe 50 is circulated in the hot water circulation pipe embedded in the ondol plate 60, it is preferable to give a pushing pressure when the hot water does not meet the appropriate pressure for circulation. To this end, if the second pressure sensor (P2) installed in the hot water supply pipe (50) detects the pressure of the hot water discharged from the lower tank of the non-power pressurizing means 40, if it is detected that it is below the predetermined pressure suitable for hot water circulation The controller 100 may transmit a corresponding signal, and the controller 100 may additionally drive a separate pump 80 installed in the hot water supply pipe 50 or the return pipe 70 to increase the circulation pressure of the hot water. have.

In addition, the hot water supply pipe 50 is further provided with a second temperature sensor (T2) and the auxiliary heater (H), the second temperature sensor (T2) is the temperature of the hot water discharged through the hot water supply pipe (50) It may be configured to additionally heat the auxiliary heater (H) by operating if it is lower than the predetermined appropriate temperature to detect.

Hot water discharged at an appropriate temperature and pressure through the hot water supply pipe 50 circulates the hot water circulation pipe of the ondol plate 60 to heat and dry the coal loaded thereon. The water used for drying the coal is returned to the replenishing water tank 46 through the return pipe 70 and then sent to the heat receiving pipe line 30 again. By repeating this process, continuous waste heat recovery and coal drying are performed. On the other hand, when the humidity is low and the water content of the coal is low or the coal boiler 10 does not operate, the first solenoid valve S1 may be closed to stop generation and circulation of hot water.

In the above, specific Example of this invention was described. However, the spirit and scope of the present invention is not limited to these specific embodiments, and various changes and modifications can be made without departing from the spirit of the present invention. Those who have it will understand.

Therefore, it should be understood that the above-described embodiments are provided so that those skilled in the art can fully understand the scope of the present invention. Therefore, it should be understood that the embodiments are to be considered in all respects as illustrative and not restrictive, The invention is only defined by the scope of the claims.

10: coal boiler 20: communication
30: heat pipe 32: waste heat recovery wing
34: annular heat shield plate 40: powerless pressurizing means
42: steam box 43: pressure regulator
43a: steam recovery pipe 44: hot water tank
44a: communication hole 46: refill bottle
48: supplemental water pipe 48a: valve body
48b: spring 50: hot water supply pipe
60: ondol plate 70: return pipe
80: pump 100: controller

Claims (7)

A coal boiler for burning coal;
A communication unit for discharging combustion gas generated from the coal boiler;
A pipe for heating the water flowing inside by heat exchange with the waste heat of the gas discharged through the communication, it is inserted into the communication through the outer wall of the communication from the outside of the communication after being wound and attached spirally along the communication inner wall A heat receiving pipe passage configured to be led out again through the outer wall of the communication;
It is for discharging the hot water discharged from the heat receiving pipe by a non-powered, the steam pipe is connected to the outlet side of the heat receiving pipe filled with water vapor generated from the hot water, and is provided in the lower portion of the steam pipe is in communication with the steam pipe It is provided in the hot water tank filled with the introduced hot water filled by gravity, and the upper part of the steam container to supply water to the inlet side of the heat receiving pipe, when the pressure of the steam container falls below the set pressure to replenish the steam container A triple water bottle type non-power pressurizing means having a supplement water bottle for supplying water;
A hot water supply pipe connected to the hot water tank of the non-power pressurizing means to discharge hot water filled in the hot water tank;
A hot plate circulating therein and an ondol plate heated in circulation of hot water supplied from the hot water supply pipe;
Hot water circulation system including a return pipe for circulating through the hot water circulation pipe of the ondol plate and for returning the cooled low temperature water to the refill bottle. The method of claim 1,
Hot water circulation system, characterized in that the heat recovery wing is formed on the outer circumferential surface of the heat receiving pipe protruding waste heat recovery wing to increase the contact area and the residence time of the gas discharged through the communication. 3. The method of claim 2,
The waste heat recovery wing is formed to protrude at an interval of 90 ° on the outer peripheral surface of the heat pipe, the hot water circulation system characterized in that extending along the longitudinal direction of the heat pipe. 3. The method according to claim 1 or 2,
Hot water circulation system, characterized in that for increasing the residence time of the gas discharged through the communication in the upper side of the heat pipe in the communication, the annular heat shield plate consisting of an annular plate shape is opened so that the gas passes through the center portion. 3. The method according to claim 1 or 2,
The non-powered press means,
If the steam pressure of the steam inside the steam container is above a certain pressure, pressurize the hot water in the hot water tank by the steam pressure and discharge it to the hot water supply pipe.
If the steam pressure of the steam inside the steam container is less than a predetermined pressure, the hot water circulation system characterized in that the hot water in the hot water tank is pressurized by the steam pressure and the pressure of the replenishment water supplied from the upper top of the steam tank to discharge to the hot water supply pipe. The method of claim 5, wherein
A communication hole is formed between the steam tank and the hot water tank of the non-power pressurizing means so that hot water introduced into the steam tank is discharged to the hot water tank, and a supplement water pipe is connected between the steam tank and the supplement water bottle, and the supplement water pipe has steam inside the steam bottle. The hot water circulation system, characterized in that the check valve is provided so that the replenishment water is supplied from the refill bottle to the steam bottle when the steam pressure of the lower than a predetermined pressure. The method of claim 5, wherein
The steam tank of the non-power pressurizing means is a hot water circulation system, characterized in that the pressure regulator for exhausting the steam to the outside when the steam pressure of the steam inside the steam tank rises above a predetermined pressure.

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