JP3557330B2 - Snow melting equipment - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a snow melting apparatus, and more particularly to a snow melting apparatus that directly utilizes heat of sewage flowing through a sewage pipe.
[0002]
[Prior art]
Conventionally, there are many snow melting facilities using a heating wire or a hot water boiler (a first conventional example). Further, a snow melting facility using sewage flowing through a sewage pipe has been proposed (second conventional example).
[0003]
[Problems to be solved by the invention]
However, the first conventional example has many problems, such as consuming a large amount of electricity, increasing equipment costs, and requiring a large space for installing the equipment.
On the other hand, the second conventional example indirectly utilizes the heat of sewage using a heat pump, and thus has a problem that an extra device such as a heat pump is required. Therefore, in order to directly use the heat of the sewage, a method of directly spraying the treated water obtained by treating the sewage onto a road or the like where it is necessary to melt snow can be considered. There is a risk that the water sprinkled on a pedestrian or the sprinkled water may freeze, and it is practically difficult to adopt the water.
[0004]
The present invention has been made in view of the above problems, and by suppressing the electric power consumption and equipment costs by adopting a system that can directly use the heat of sewage, It is an object of the present invention to provide a snow melting device that can reduce an installation space.
[0005]
[Means for Solving the Problems]
In the snow melting apparatus according to the first and second aspects of the present invention, each of the starting and ending portions of the radiating pipe for snow melting is provided with a separate water flowing pipe communicating with the sewage pipe. A sewage flow passage is formed by the and the different water passages, and the sewage of the sewer is supplied to the snow melting heat radiation line through one of the water passages. Then, a pump is provided for returning the sewage flowing out of the heat radiation pipe for snow melting to the above-mentioned drain pipe through the other water pipe .
[0006]
In the above configuration , when the pump is operated, sewage of the sewage pipe is supplied to the radiating pipe for snow melting through one of the water pipes, and heat flowing through the radiating pipe releases heat of the sewage to melt the snow. Used for Then, the sewage flowing out of the heat radiation pipe is returned to the sewage pipe through the other water pipe. As a result, the heat of the sewage is directly used for melting snow. Further, in the above configuration , the sewage flows through the radiating pipe for snow melting provided under the road surface of the road, and the sewage is not directly sprayed to the snow melting point. There is no danger of getting on pedestrians or freezing sprinkled water.
[0007]
By the way, when the sewage pipe is fed with sewage flowing into the radiating pipe for snow melting, the pipe wall surface of the radiating pipe is immediately contaminated by microorganisms in the sewage, and the deterioration or clogging of the radiating performance is quickly reduced. May occur.
Therefore, in the invention according to claim 1, each of the water passages has a bypass line communicating with the other water passage line, and each of the water passage lines has the bypass line, the separate water passage line, and the bypass line. A valve capable of forming a closed loop sewage circuit formed by a radiating pipe for snow melting is provided, an ozone gas injector is provided in the sewage circuit, an expansion tank is provided in the sewage circuit, and the pump is 3. A configuration in which the pump is interposed in the circulation path and its pump is also used to circulate sewage and ozone gas injected from the ozone gas injector into the sewage circulation path. in the invention according to have a bypass conduit for communicating each other the through water lines, each separate the water passage pipe, the bypass line and the other the through water lines and radiating pipe for the snow melting And closed loop sewage circulation by Formable valve is provided, the sewage circulating path ozone gas injector in is provided, the discharge pipe communicating with the sewer pipe to the bypass line of the sewage circulating path is provided, the pump is the sewage circulating path have been interposed in its pump is adopted a structure that is also used to circulate the ozone gas injected from the sewage and the ozone gas injector into the sewage circulating path.
[0008]
According to the above configuration , by controlling a valve provided in each different water passage, a closed loop sewage circuit is formed by the bypass line, each other water passage and the snow melting heat radiation line, and Ozone gas can be injected into the sewage circuit from an ozone gas injector. Then, when an operation of injecting ozone gas from the ozone gas injector into the sewage circuit is performed, microorganisms in the sewage flowing through the sewage circuit are sterilized, and dirt on the pipe wall surface of the heat radiation pipe for snow melting is washed. Therefore, the heat radiation performance is prevented from lowering and clogging. Further, in the above configuration , after the sewage of the sewage pipe is fed to the radiating pipe for snow melting, a pump for returning the sewage flowing out of the radiating pipe for snow melting to the sewage pipe has the sewage flowing into the sewage circuit. Since it is also used to circulate the ozone gas injected from the ozone gas injector, there is no need to install an extra pump.
[0009]
According to a third aspect of the present invention, there is provided the snow melting apparatus according to the first or second aspect, wherein the flow direction of the sewage flowing through the heat radiation pipe for snow melting is corrected between the respective water flow pipes. A positive / reverse switching valve that can switch between the flow direction and the reverse flow direction is interposed.
According to the present invention, the dust flowing into the snow melting heat radiation pipe together with the sewage is controlled by switching the flow direction of the sewage flowing through the heat radiation pipe for snow melting by controlling the positive flow reverse flow switching valve. Can be discharged from the heat radiation pipe for snow melting, which helps to prevent the heat radiation performance of the heat radiation pipe for snow melting from being deteriorated or blocked.
[0010]
According to a fourth aspect of the present invention, there is provided the snow melting apparatus according to any one of the first to third aspects, wherein the ozone gas mixed with the sewage flowing through the sewage circulation path is separated into the sewage circulation path. A steam separator is interposed, and the steam separator is connected to an ozone decomposer that detoxifies and discharges the ozone gas separated by the steam separator.
According to the present invention, the ozone gas injected into the sewage circuit is separated by the steam separator, decomposed by the ozone decomposer, made harmless, and then discharged.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 1 is an explanatory view of an embodiment of a snow melting apparatus according to the present invention, FIG. 2 is an explanatory view of a valve of the above snow melting apparatus during a snow melting operation, and FIG. 3 is an explanatory view of a valve of the snow melting apparatus during an ozone gas cleaning operation. It is.
[0012]
In FIG. 1, reference numeral 1 denotes a sewage pipe, and in the snow melting apparatus of this embodiment, heat of sewage flowing through the sewage pipe 1 is used for melting snow. The snow melting device has a heat dissipating portion 2, and a first water passage 4 is connected to a start end 31 of a heat dissipating heat dissipating line 3 provided in the heat dissipating portion 2, whereas The second water passage 5 is connected to the end portion 32 of the heat radiation pipe 3, and the first water passage 4 and the second water passage 5 communicate with the sewage line 1. Accordingly, the sewage passage 10 is formed by the snow melting heat radiation pipe 3 and the first and second water passage pipes 4 and 5. A pump P is interposed in the sewage passage 10, more specifically, the first sewage pipe 4. When the pump P is operated, the sewage flowing through the sewage pipe 1 is supplied to the flow path provided in the pump P in the direction of the arrow a in FIG.
[0013]
A forward / backflow switching valve 6 is interposed between the first water passage 4 and the second water passage 5. The forward / backflow switching valve 6 includes a valve 61 interposed in the first water passage 4, a valve 62 interposed in the second water passage 4, and when these two valves 61, 62 are closed. A first bypass passage 63 for sending sewage supplied by the pump P and flowing through the first water passage 4 to the end portion 32 of the heat radiation pipe 3 for snow melting; a valve 64 provided in the first bypass passage 63; A second bypass 65 for sending sewage discharged from the starting end 31 of the heat radiation pipe 3 for snow melting to the outlet side of the valve 62 when the two valves 61 and 62 are closed; And a valve 66 provided. Therefore, the flow direction of the sewage flowing through the heat-dissipating pipe 3 for snow melting is such that the flow direction of the sewage flowing in the snow melting heat radiation pipe 3 is in the forward flow direction from the start end 31 to the end 32 and in the reverse flow direction in the opposite direction. It has the function of switching.
[0014]
On the side closer to the sewage line 1 than the above-mentioned forward / reverse flow switching valve 6, a portion of the first water passage 4 upstream of the installation location of the pump P and the second water passage 5 are connected by a bypass line 7. A valve V1 is interposed between the bypass pipe 7 and the first water pipe 4 and a valve V2 is interposed between the bypass pipe 7 and the second water pipe 5 respectively. I have. Three-way switching valves are used for these valves V1 and V2. M1 and M2 denote control motors for the valves V1 and V2. The valve V1 is connected to the first water passage 4 at the installation position of the valve V1 and the first position at which the bypass line 7 is cut off from the first water passage 4, and the valve V1 is located at the first position where the valve V1 is installed. The valve V2 can be switched to a second position in which the one water line 4 is shut off and the bypass line 7 communicates with the inlet side of the pump P. Similarly, the valve V2 is connected to the second water line at the installation position of the valve V2. A first position where the passage 5 is communicated and the bypass line 7 is cut off from the second water line 5; and a second position where the valve V2 is installed, the second water line 5 is cut off and the end of the snow melting heat radiation pipe 3 is terminated. The position can be switched to a second position where the bypass line 7 communicates with the portion 32. FIG. 2 shows an example of the flow of sewage by an arrow F1 when both valves V1 and V2 are switched to the first position, and FIG. 3 shows that both valves V1 and V2 are in the second position. The flow of sewage when switched to the position is indicated by arrow F2. When both of the valves V1 and V2 are switched to the second position as shown in FIG. 3, the bypass pipe 7, the first water pipe 4, the second water pipe 5, and the heat radiation pipe for snow melting are used. 3 form a closed loop sewage circuit 8.
[0015]
An ozone gas injector 9 and a steam separator 100 are provided in the sewage circuit, specifically, in the bypass pipe 7. An ozone gas generator 91 is connected to the ozone gas injector 9. Further, an ozone decomposer 110 having a function of detoxifying and discharging ozone gas is connected to the steam separator 100. Further, an expansion tank 130 is interposed in a pipe 120 that connects the steam separator 100 and the ozone decomposer 110, and the pipe 120 between the expansion tank 130 and the steam separator 100 is provided. Is connected to a makeup water tank 140. The steam separator 100 is connected to a discharge pipe 150 that allows water in the bypass pipe 7 to escape to the sewer pipe 1, and the discharge pipe 150 is provided with a valve V3 controlled by a motor M3. Reference numeral 160 denotes an automatic strainer provided in the first water passage 4.
[0016]
In the snow melting apparatus shown in FIG. 1, during the snow melting operation, the forward / back flow switching valve 6 is set in the forward direction, and both the valves V1 and V2 are set in the first position shown in FIG. Further, the heat radiating portion 2 is buried in a snow melting portion such as below a road surface. When the pump P is operated in this state, the sewage of the sewage pipe 1 is supplied to the radiating pipe 3 for snow melting through the first water pipe 4, and the heat generated by the sewage while flowing through the radiating pipe 3. Is radiated by the radiator 2 and is used for melting snow. The sewage discharged from the heat radiation pipe 3 is returned to the sewage pipe through the second water pipe 5. As a result, the heat of the sewage is directly used for melting snow.
[0017]
When the forward / backward flow switching valve 6 is switched between the forward / backward flow direction and the forward / backward flow direction at regular time intervals or as necessary during such snow melting operation, the flow of sewage in the heat radiation pipe 3 becomes forward flow. The dust is alternately switched between the direction and the reverse flow direction, so that the dust entering the heat radiation pipe 3 together with the sewage is discharged from the heat radiation pipe 3.
[0018]
At the time of the snow melting operation described above, microorganisms in the sewage flowing in the heat radiation pipe 3 may contaminate the pipe wall surface of the heat radiation pipe 3 to lower the heat radiation performance or cause clogging. This can be eliminated by performing the ozone gas cleaning operation described below.
[0019]
In the ozone gas cleaning operation, both the valves V1 and V2 are set to the second position shown in FIG. 3 and the bypass line 7, the first water line 4, the second water line 5, and the heat radiation line 3 A closed loop sewage circuit 8 is formed. Then, the ozone gas generated by the ozone gas generator 91 is injected into the sewage circuit 8 through the ozone gas injector 9. When such an ozone gas injection operation is performed, ozone gas is mixed as bubbles into the sewage circulating in the sewage circulation path 8, and a part of the ozone gas is dissolved in the water, but the rest circulates together with the sewage in a gaseous state. Thereby, the microorganisms in the sewage flowing through the sewage circulation path 8 are sterilized, and the dirt on the pipe wall surface of the heat radiation pipe 3 is washed, thereby preventing the heat radiation performance from lowering and clogging. The apparent volume change of the water in the sewage circuit 8 caused by the injection of the ozone gas is absorbed by the operation of the expansion tank 130. Such an ozone gas cleaning operation is desirably performed at regular intervals, but may be appropriately performed as needed in some cases.
[0020]
The ozone gas mixed with the sewage circuit 8 and mixed with the sewage is appropriately separated by the steam separator 100, decomposed by the ozone decomposer 110, rendered harmless, and then discharged into the atmosphere.
[0021]
After performing the ozone gas cleaning operation, when both the valves V1 and V2 are switched to the second position and the operation is shifted to the above-described snow melting operation, the water remaining in the bypass pipe 7 opens the valve V3 to open the sewage pipe. It is discharged to 1.
[0022]
In this embodiment, after the sewage of the sewage line 1 is supplied to the radiating line 3, the pump P for returning the sewage discharged from the radiating line 3 to the sewage line 1 is connected to the sewage circuit 8. And ozone gas are circulated. Therefore, only one pump P needs to be installed.
[0023]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to this invention, since it becomes possible to melt snow using the heat which sewage has directly, electric power consumption and equipment cost are suppressed, and installation space becomes small.
[0024]
Further, according to the present invention, ozone gas is injected into the closed loop sewage circuit formed by the bypass pipe, the separate water flow pipes, and the heat radiation pipe for snow melting, and Since it is possible to sterilize microorganisms and wash dirt on the pipe wall of the heat radiation pipe for snow melting, it is easy to maintain the initial heat radiation performance over a long period of time, and as a result, it can not be actually used conventionally It becomes possible to adopt a method of flowing sewage directly into the radiating pipe for snow melting and melting the snow.
[0025]
Further, according to the present invention, it is possible to control the forward / backflow switching valve to wash and discharge dust entering the heat radiation pipe for snow melting. Further, the ozone gas injected into the sewage circuit can be made harmless and discharged after being separated from the sewage.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram of one embodiment of a snow melting apparatus according to the present invention.
FIG. 2 is an explanatory diagram of a valve during a snow melting operation.
FIG. 3 is an explanatory diagram of a valve during an ozone gas cleaning operation.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Sewage pipe 3 Snow melting heat radiation pipe 4 1st water flowing pipe 5 2nd water flowing pipe 6 Forward flow reverse flow switching valve 7 Bypass pipe 8 Sewage circulation path 9 Ozone gas injector 10 Sewage flow path 31 Snow melting heat release pipe Start end 32 of snow melting heat radiating pipe end 100 steam separator 110 ozone decomposer
130 Expansion tank
150 Discharge pipe P Pump V1, V2 Valve

Claims (4)

Separate water passages leading to the sewage line are respectively connected to the start end and the end of the heat radiation line for snow melting, and the sewage passage is formed by the heat radiation line for snow melting and the separate water passage. Is formed, and after the sewage of the sewage pipe is supplied to the radiating pipe for melting snow through one of the different circulating pipes, the sewage flowing out of the radiating pipe for melting snow is discharged. e Bei pump back to the sewer pipe through the other water pipe line has a bypass line for communicating the respective separate the through water lines, each separate the water passage pipe, the bypass line and the other A valve capable of forming a closed-loop sewage circuit by the water-flow pipe and the snow-melting heat-radiating pipe is provided, an ozone gas injector is provided in the sewage circuit, and an expansion tank is provided in the sewage circuit. And the pump is interposed in the sewage circuit, and the pump Snow melting apparatus, characterized in that also serves to circulate the ozone gas injected from the sewage and the ozone gas injector into the sewage circulating path. Separate water passages leading to the sewage line are respectively connected to the start end and the end of the heat radiation line for snow melting, and the sewage passage is formed by the heat radiation line for snow melting and the separate water passage. Is formed, and after the sewage of the sewage pipe is supplied to the radiating pipe for melting snow through one of the different circulating pipes, the sewage flowing out of the radiating pipe for melting snow is discharged. A pump for returning to the sewer pipe through the other water pipe; and a bypass pipe for communicating each of the different water pipes. A valve capable of forming a closed-loop sewage circuit formed by the water-flow pipe and the snow-melting heat-dissipating pipe is provided.An ozone gas injector is provided in the sewage circuit. discharge pipe communicating with the water pipe is provided, the pump is the sewage circulating path Optionally interposed, snow melting apparatus in which the pump is characterized in that it also serves to circulate the ozone gas injected from the sewage and the ozone gas injector into the sewage circulating path. A positive / reverse flow switching valve capable of switching a flow direction of sewage flowing through the heat radiation pipe for snow melting between a normal flow direction and a reverse flow direction is interposed between the separate water flow pipes. The snow melting apparatus according to claim 2. In the sewage circuit, a steam separator for separating ozone gas mixed in the sewage flowing through the sewage circuit is interposed. The snow melting apparatus according to any one of claims 1 to 3, wherein an ozone decomposer to be discharged is connected.

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