JP6512444B2 - Snow melting equipment and snow melting method - Google Patents

Description

  BACKGROUND OF THE INVENTION Field of the Invention The present invention relates to a snow melting facility and a snow melting method capable of performing stable snow melting processing using waste heat of drainage with a simple configuration.

  Conventionally, the raw water of food factory drainage is, for example, about 60 ° C. to 45 ° C., and the water temperature is often relatively high in many cases, and is used for preheating of the raw water temperature rise of a boiler or the like.

  On the other hand, in the snowfall area, as a measure against snowfall, road heating is often performed to melt the snow by warming the road surface by burying pipes circulating warm water under the road surface such as roads, roads and parking lots. However, in the large site, the road heating is performed only at the important part, and in the other part, the snow removal work is requested to the snow removal company, and the removed snow is transported to the designated snow dump and disposed of.

JP, 2008-75291, A

  As described above, snow removal is a major problem in a snowy area. In particular, snow on the entrance and parking lot in the site and snow on the roof are often removed manually, and when the amount of snow accumulation is large, it was necessary to transport the snow on the site to the snowfall site. When the snowfall area is far away, snowfall takes a lot of time, money and labor.

  Here, it is conceivable to use the exhaust heat of the raw water of the factory drainage described above to melt the snow that has been snow-removed. However, raw water that has not been treated with wastewater has pollution loads such as organic matter, suspended solids, and oil, and it is necessary to take measures to reduce the risk of clogging such as to the heat exchanger. Therefore, the configuration of the heat exchanger has to be complicated.

  On the other hand, Patent Document 1 describes a snow melting tank that introduces domestic wastewater into the snow melting tank main body provided with snow throw holes and uses the heat of domestic wastewater to perform snow melting.

  However, domestic drainage is water discharged in general households, and the amount of water is unstable, so stable snow melting can not be performed. In addition, domestic drainage is raw water, which is different from rainwater drainage.

  The present invention is made in view of the above, and an object of the present invention is to provide a snow melting facility and a snow melting method capable of performing stable snow melting processing by utilizing waste heat of drainage with a simple configuration.

  In order to solve the problems described above and to achieve the object, the snow melting facility according to the present invention is a treated water that is subjected to a wastewater treatment to the raw water discharged from a predetermined facility to obtain treated water discharged and circulated. Using the piping, a heat exchanger for performing heat exchange between the treated water flowing through the treated water piping and the snow melting water, and using the snow melting water heated by the heat exchanger, the snow that has been input is melted by removing snow. And a snow melting tank.

  In the snow melting facility according to the present invention, in the above invention, the heat exchanger and the snow melting tank are connected via snow melting water supply piping and snow melting water return piping, and the snow melting water supply piping and An end of the snow melting water return piping in the snow melting tank is open, and the snow melting water is supplied from the snow melting water supply piping, the inside of the snow melting tank, and the heat exchanger via the snow melting water return piping. It is characterized in that it circulates with the snow melting tank and discharges the snow melting water that has increased along with the snow melting process.

  Further, the snow melting facility according to the present invention comprises, in the above invention, a blower for supplying a gas, and a bubble supply nozzle for converting the gas supplied from the blower into a bubble and supplying the gas into the snow melting tank. It is characterized by promoting the circulation of water.

  In the snow melting facility according to the present invention as set forth in the above invention, the waste water treatment is a biological treatment.

  In the snow melting method according to the present invention, raw water discharged from a predetermined facility is subjected to drainage treatment to obtain treated water to be discharged, and heat exchange between the treated water and the snow melting water is performed by a heat exchanger. It is characterized by carrying out snow removal using the snow melting water heated by the said heat exchanger, and melting snow input.

  According to the present invention, raw water discharged from a predetermined facility is subjected to drainage treatment to obtain treated water to be discharged, and heat exchange between the treated water and snow melting water is performed by a heat exchanger, and the heat is generated. The snow melting water heated by the exchanger is used to remove the snow and melt the introduced snow. For this reason, since the heat exchanger uses treated water with no pollution load, the risk of clogging is greatly reduced, and the configuration becomes simple. Moreover, since the treated water discharged and discharged from the raw water discharged from the predetermined facility is used, stable snow melting processing can be performed.

FIG. 1 is a block diagram showing a configuration of a waste water treatment system including a snow melting facility according to an embodiment of the present invention.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

(overall structure)
FIG. 1 is a block diagram showing the configuration of a waste water treatment system 100 including a snow melting facility 1 according to an embodiment of the present invention. As shown in FIG. 1, the wastewater treatment system 100 has a domestic wastewater treatment facility 101. The domestic wastewater treatment facility 101 performs wastewater treatment to remove contamination of organic waste, suspended matter, oil and the like in the production wastewater 9 discharged from a predetermined facility such as a factory. This wastewater treatment may include biological treatment.

  The treated water 10 subjected to drainage treatment by the domestic wastewater treatment facility 101 is supplied into the discharge monitoring tank 108. The treated water 10 in the discharge monitoring tank 108 may be discharged as it is, but in this embodiment, the exhaust heat of the treated water 10 is used for the snow melting process by the snow melting facility 1.

  The treated water 10 exceeding the predetermined amount in the discharge monitoring tank 108 flows into the discharge pump tank 109. The inflowed treated water is pumped up and discharged.

(Snow melting facility)
The treated water 10 in the discharge monitoring tank 108 circulates between the discharge monitoring tank 108 and the heat exchanger 12 via the treated water pipes L1 and L2. The circulation of the treated water 10 is performed by suction of the pump 11 in the discharge monitoring tank 108. The temperature of the treated water 10 is a normal temperature of 35 ° C to 30 ° C. The heat exchanger 12 supplies the exhaust heat of the treated water 10 to the snow melting facility 1, and returns it to the discharge monitoring tank 108 as the treated water 10 at about 15 ° C.

  The snow melting facility 1 is separated into a snow melting tank E1 and a discharge tank E2 by a partition plate 2 whose upper portion is open. The discharge tank E2 is an area for storing snow melting water which has been increased due to the snow melting process, and is discharged by suction of the pump 14.

  The snow melting tank E1 is further separated into snow melting regions E11 and E12 by the partition plate 3 whose lower portion is opened. In the upper part of the snow melting area E11, a snow throw hatch 4 is provided. The snow melting water 20 heated by the heat exchanger 12 is supplied to the snow melting region E12 through the snow melting water return pipe L3. Therefore, the snow introduced from the snow throwing hatch 4 is subjected to the snow melting process by the heated snow melting water 20. On the other hand, the pump 13 is disposed in the snow melting region E12. The pump 13 returns the snow melting water 20 to the heat exchanger 12 via the snow melting water supply pipe L4. The heat exchanger 12 raises the temperature of the snowmelt water 20 of about 5 ° C. returned via the snowmelt water supply pipe L4 to about 20 ° C., and supplies it to the snow melt region E11 via the snowmelt water return pipe L3. Therefore, the snow melting water 20 circulates between the heat exchanger 12 and the snow melting area E1 via the snow melting water return piping L3, the pump 13, and the snow melting water supply piping L4.

  However, as the snow is thrown from the snowfall hatch 4, the snow melting water 20 increases, and the overflowing snow melting water 20 flows into the discharge tank E2. Then, the snow melting water 20 that has flowed into the discharge tank E2 is discharged as described above.

  The end L3a of the snow melting water return pipe L3 disposed in the snow melting area E11 is provided in the vicinity of the bottom of the snow melting area E11. Although the snow melting water 20 is circulated by the water pressure of the snow melting water 20 discharged from the snow melting water return pipe L3, a bubble supply nozzle 5 is further provided. Air is supplied to the bubble supply nozzle 5 from the blower to generate bubbles. The air bubbles promote the circulation flow of the snow melting water 20 discharged from the end L3a of the snow melting water return pipe L3 by the buoyancy in the snow melting region E11.

  In this embodiment, the snow melting process is performed using the exhaust heat of the normal temperature treated water 10 that has already been subjected to the drainage process. Therefore, the heat exchanger 12 for supplying the waste heat of the treated water 10 to the snow melting water 20 uses the treated water 10 and the snow melting water 20 without pollution load, and the risk of clogging is greatly reduced, so the configuration is simple. It becomes a thing.

  Further, since the snow melting process may be heat of latent heat for melting snow at 0 ° C., the snow melting process can be sufficiently performed even with the treated water 10 at a normal temperature of about 30 ° C. Therefore, it is not necessary to use a heat pump etc. as a heat recovery means.

  The wastewater treatment of the biological treatment tank 106 and the precipitation tank 107 described above is not limited to biological treatment, but may be physical treatment using precipitation or adsorption, or chemical treatment using oxidation reaction or reduction reaction. It may be. The point is that the treated water 10 may be treated as a treated water that can be discharged.

DESCRIPTION OF SYMBOLS 1 Snow melting equipment 2, 3 partition plate 4 Snow throw hatch 5 Bubble supply nozzle 9 Living drainage 10 Treated water 11, 13, 14 Pump 12 Heat exchanger 20 Snow melting water 100 Living drainage treatment facility 108 Discharge monitoring tank 109 Discharge pump tank E1 Snow melting Tank E11, E12 Snow melting area E2 Discharge tank L1, L2 Treated water piping L3 Snow melting water return piping L3a end L4 Snow melting water supply piping

Claims (5)

Processed water piping which acquires and circulates treated water discharged by subjecting raw water discharged from a predetermined facility to drainage treatment;
A heat exchanger for performing heat exchange between treated water flowing through the treated water pipe and snow melting water;
A snow melting tank for removing snow and melting the input snow by using the snow melting water warmed by the heat exchanger;
Snow melting equipment characterized by having. The heat exchanger and the snow melting tank are connected via snow melting water supply piping and snow melting water return piping,
Ends of the snow melting water supply piping and the snow melting water return piping in the snow melting tank are open,
The snow melting water circulates between the heat exchanger and the snow melting tank through the snow melting water supply piping, the inside of the snow melting tank, and the snow melting water return piping, and the snow melting water increased with the snow melting process The snow melting facility according to claim 1, characterized in that it is discharged. A blower for supplying gas,
A bubble supply nozzle that supplies the gas supplied from the blower as bubbles into the snow melting tank;
The snow melting facility according to claim 1 or 2, further comprising: promoting circulation of the snow melting water.   The snow melting facility according to any one of claims 1 to 3, wherein the waste water treatment is a biological treatment.   Raw water discharged from a predetermined facility is subjected to drainage treatment to obtain treated water to be discharged, heat exchange between the treated water and snow melting water is performed by a heat exchanger, and the water is heated by the heat exchanger. A snow melting method characterized by using the snow melting water to remove snow and melting the input snow.

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