JP6163346B2 - Purification equipment for contaminated soil and method for purification of contaminated soil - Google Patents

Description

  The present invention relates to a contaminated soil purification facility and a contaminated soil purification method.

  Patent Document 1 discloses a technique related to a method for manufacturing a cooling and heating facility for a building built on a flat ground. In this prior art, a large number of vertical columnar heat exchange tubes are embedded in the periphery of the hole for the artificial pond, and a heat pump having a refrigerant circulating in a closed circuit consisting of an evaporator, a compressor, a condenser, and an expansion valve is installed. A columnar heat exchange cylinder, a primary antifreeze liquid circulation path that circulates in the evaporator, a condenser, and a secondary antifreeze liquid circulation path that circulates in the heat exchange indoor unit are provided.

  Patent Document 2 discloses a technique related to equipment using geothermal heat in a soil-contaminated area. In this prior art, an evaporator, a compressor, and a condenser are disposed between a primary side heat exchanger having a heat collecting pipe and a first circulation path, and a secondary side heat exchanger having a heat radiation pipe and a second circulation path. And a heat pump with an expansion valve, burying the heat collection pipe horizontally or vertically in the soil-contaminated area, collecting ground heat with the first heat medium circulating inside, and raising the temperature with the heat pump, then the heat The heat is radiated from the heat radiating pipe by the second heat medium circulating inside.

  Patent Document 3 discloses a technique related to an in-situ purification method for contaminated soil and / or groundwater. In this prior art, a cleaning agent having a melting point equal to or higher than that of soil and / or groundwater is heated to liquefy and injected into contaminated soil and / or groundwater with volatile organochlorine compounds or nitrate nitrogen. It penetrates and diffuses into the middle and / or groundwater and solidifies as the temperature drops.

  In addition, related techniques are described in Patent Documents 4 to 8.

  Here, the temperature of groundwater is around 18 ° C. throughout the year. Therefore, in the purification of contaminated soil, it is difficult to improve the solubility of the pollutant in ground water, the activity of microorganisms that decompose the pollutant, and the like, and there has been a limit to improving the purification efficiency.

Japanese Patent No. 3999591 JP 2003-343929 A JP 2004-216220 A JP-A-9-098770 JP 2010-000454 A Japanese Patent No. 4176383 Patent No. 4428125 Japanese Patent No. 4428638

  An object of the present invention is to improve the purification efficiency of contaminated soil.

  According to the first aspect of the present invention, groundwater containing pollutants is pumped from the first aquifer above the hardly permeable layer and purified by a purification device, and the groundwater is extracted from the second aquifer below the hardly permeable layer. And the heat exchange between the groundwater pumped from the second aquifer and the groundwater to heat the groundwater and heat the groundwater A heat exchanger that lowers the temperature of the medium, and cools using the heat medium that has been heat-exchanged by the heat exchanger and that has fallen in temperature, and sends the heat medium that has been raised in temperature to the heat exchanger after use Using means.

  In invention of Claim 1, the groundwater containing the pollutant pumped up from the 1st aquifer is purified with a purification apparatus. In addition, ground water (room temperature water) pumped from the second aquifer is heat-exchanged with a heat medium by a heat exchanger to be heated and poured into the first aquifer. By pouring warm water, the groundwater in the first aquifer becomes warm water.

  And the groundwater of a 1st aquifer becomes warm water, The solubility to the groundwater of a pollutant and the activity of the microorganisms which decompose | disassemble a pollutant improve. In addition, the purification efficiency is improved by pumping and purifying the groundwater that has become hot water.

  In addition, the temperature of the heat medium exchanged with the groundwater pumped from the second aquifer decreases in temperature, and the heat medium whose temperature has decreased is used for cooling by the utilization means. Sent to heat exchanger. And as mentioned above, it heat-exchanges with the groundwater of a 2nd aquifer, makes the groundwater of a 2nd aquifer warm, and injects water into a 1st aquifer.

  In other words, groundwater pumped from the second aquifer (ordinary temperature water) is heat-exchanged with the heat medium by the heat exchanger to lower the temperature of the heat medium and used for cooling by the utilization means, and heated to the hot water by the heat exchanger. Purified groundwater is injected into the first aquifer to improve purification efficiency.

  In addition, by using the exhaust heat generated from the utilization means, the overall energy efficiency of the purification and utilization means of the contaminated soil is improved compared to the case where the purification of the contaminated soil and the utilization means are performed by separate devices. It is done.

  According to a second aspect of the present invention, the purification well apparatus supplies both the groundwater containing pollutants pumped from the first aquifer and the groundwater containing pollutants pumped from the second aquifer. It is comprised so that it may purify | clean with the said purification apparatus.

  In invention of Claim 2, even if it is a case where a contaminant is contained also in a 2nd aquifer, it can respond.

In the invention of claim 3, groundwater containing pollutants is pumped from the first aquifer above the hardly permeable layer and purified by a purification device, and the groundwater purified by the purification device is supplied to the first aquifer. A purification well device capable of both pouring water and pumping groundwater from the second aquifer below the hardly-permeable layer and injecting it into the first aquifer, and the second Before the groundwater pumped from the aquifer is poured into the first aquifer, heat exchange is performed with the heat medium to make the groundwater warm and reduce the temperature of the heat medium; A heat exchanger capable of both exchanging heat between the groundwater pumped from two aquifers and the heat medium to make the groundwater cold and increasing the temperature of the heat medium And cooling using the heat medium whose temperature has been lowered by heat exchange in the heat exchanger. And sending the heat medium temperature rises after Rutotomoni use a heat exchanger, wherein the temperature decreases after use with temperature is heat-exchanged in the heat exchanger is heated by using the heating medium has risen And a utilization means capable of both sending the heat medium to the heat exchanger.

  In the invention according to claim 3, the purification well apparatus purifies the groundwater containing the pollutant pumped from the first aquifer without pumping the groundwater pumped from the second aquifer to the first aquifer. Purify with and pour water into the first aquifer. In the heat exchanger, heat is exchanged between the groundwater pumped from the second aquifer and the heat medium to cool the groundwater and raise the temperature of the heat medium.

  And a utilization means heats using the heat medium which heat-exchanged with the heat exchanger and the temperature rose. Therefore, heating (heating) can also be performed by using means. In addition, you may use separately the groundwater which pumped up from the 2nd aquifer and became cold water with the heat exchanger.

In the invention of claim 4, groundwater containing pollutants is pumped from the first aquifer above the hardly permeable layer and purified by a purification device, and the groundwater from the second aquifer below the hardly permeable layer is purified. Heat exchange between the purification well device for pumping water into the first aquifer and the groundwater pumped from the second aquifer before pouring into the first aquifer The groundwater is heated and the temperature of the heat medium is lowered , and heat exchange is performed between the groundwater pumped from the first aquifer and purified by the purification device, and the heat medium. Cooling is performed using a heat exchanger in which both groundwater is cooled and the temperature of the heat medium can be increased , and the heat medium that has undergone heat exchange in the heat exchanger and the temperature of the heat medium has decreased. and sending to the heat exchanger the heat medium temperature rises after use with, And sending the heat medium temperature is decreased after use with temperature is heat-exchanged in serial heat exchanger is heated by using the heating medium has risen to the heat exchanger, utilization means both are capable of And .

  In the invention according to claim 4, the purification well apparatus injects the groundwater pumped from the second aquifer into the first aquifer without sending it to the heat exchanger. Moreover, while purifying the groundwater containing the pollutant pumped up from the 1st aquifer with a purification apparatus, it heat-exchanges with a heat medium with a heat exchanger, makes groundwater cold water, and raises the temperature of a heat medium.

And a utilization means heats using the heat medium which heat-exchanged with the heat exchanger and the temperature rose. In addition, you may use separately the groundwater which pumped up from the 1st aquifer and became cold water with the heat exchanger.
According to a fifth aspect of the present invention, the purification well device supplies both the groundwater containing pollutants pumped from the first aquifer and the groundwater containing pollutants pumped from the second aquifer. It is comprised so that it may purify | clean with the said purification apparatus.
In invention of Claim 5, even if it is a case where a contaminant is contained also in a 2nd aquifer, it can respond.

According to a sixth aspect of the present invention, there is provided a pumping process for pumping groundwater containing contaminants from the first aquifer above the hardly permeable layer, and a first purifier for purifying the groundwater pumped from the first aquifer. Groundwater is pumped from the second aquifer below the hardly permeable layer, and the heat exchange is performed with the heat medium by a heat exchanger to lower the temperature of the heat medium and to change the groundwater to warm water. A heat exchanging step, a water pouring step of pouring the ground water pumped from the second aquifer and heat-exchanged by the heat exchanger into warm water into the first aquifer, and heat generated by the heat exchanger. And a cooling step of cooling using the heat medium whose temperature has been reduced after being exchanged.

In invention of Claim 6 , the groundwater containing the pollutant pumped up from the 1st aquifer is purified with a purification apparatus. In addition, ground water (room temperature water) pumped from the second aquifer is heat-exchanged with a heat medium by a heat exchanger to be heated and poured into the first aquifer. By pouring warm water, the groundwater in the first aquifer becomes warm water.

  And the groundwater of a 1st aquifer becomes warm water, The solubility to the groundwater of a pollutant and the activity of the microorganisms which decompose | disassemble a pollutant improve. In addition, the purification efficiency is improved by pumping and purifying the groundwater that has become hot water.

  In addition, the temperature of the heat medium exchanged with the groundwater pumped from the second aquifer decreases in temperature, and the heat medium whose temperature has decreased is used for cooling by the utilization means. Sent to heat exchanger. And as mentioned above, it heat-exchanges with the groundwater of a 2nd aquifer, makes the groundwater of a 2nd aquifer warm, and injects water into a 1st aquifer.

  In other words, groundwater pumped from the second aquifer (ordinary temperature water) is heat-exchanged with the heat medium by the heat exchanger to lower the temperature of the heat medium and used for cooling by the utilization means, and heated to the hot water by the heat exchanger. Purified groundwater is injected into the first aquifer to improve purification efficiency.

  Moreover, compared with the case where purification of contaminated soil and utilization means are performed by separate devices, the overall energy efficiency of purification of contaminated soil and utilization means is enhanced.

The invention of claim 7 has a second purification step of purifying the groundwater pumped from the second aquifer with the purification device before the water injection step.

In the invention described in claim 7 , even when the two aquifers contain a contaminant, it can be dealt with.

According to the present invention, the purification efficiency of contaminated soil can be improved.

BRIEF DESCRIPTION OF THE DRAWINGS It is a block diagram which shows typically the structure of the purification equipment of the contaminated soil which concerns on 1st embodiment of this invention, and shows purification | cleaning of contaminated soil. It is a block diagram which shows typically the structure of the principal part of the well of a purification well apparatus. It is process drawing which shows a mode that normal temperature water is replaced with warm water after starting purification of contaminated soil from (A) to (B). It is a block diagram which shows typically the structure of the purification equipment of the 1st modification of 1st embodiment of this invention, and shows purification | cleaning of contaminated soil typically. It is a block diagram which shows typically the structure of the purification equipment of the 2nd modification of 1st embodiment of this invention, and shows purification | cleaning of contaminated soil typically. It is a block diagram which shows typically the structure of the purification equipment of the contaminated soil which concerns on 2nd embodiment of this invention, and shows purification | cleaning of contaminated soil typically. It is a block diagram which shows typically the structure of the purification equipment of the 1st modification of 1st embodiment of this invention, and shows purification | cleaning of contaminated soil typically. It is a block diagram which shows typically the structure of the purification equipment of the 2nd modification of 1st embodiment of this invention, and shows purification | cleaning of contaminated soil typically.

<First embodiment>
The purification equipment of the contaminated soil which concerns on 1st embodiment of this invention is demonstrated.
[soil]

  As shown in FIG. 1, the aquifer 12 is below the groundwater level S in the ground 10. In the aquifer 12, contaminated soil 20 containing pollutants is present. Contaminants include organic compounds typified by trichlorethylene and benzene, metal compounds such as hexavalent chromium and arsenic, inorganic compounds such as cyan, and mineral oils typified by gasoline and light oil.

  Below the aquifer 12 is a hardly permeable layer 14 that is less permeable than the aquifer 12. An aquifer 16 is provided below the hardly permeable layer 14. The aquifer 16 is almost free of contaminants or is present at low concentrations that do not require purification. Further, a structure such as an office building (not shown) is built on the ground 10.

[Purification equipment]
The purification facility 100 includes a water shielding wall 50, a purification well device 110, a heat exchanger 70, an air conditioner 60, and a control device 80.

  The impermeable wall 50 is formed so as to surround the periphery of the contaminated soil 20. Further, the lower end portion 50 </ b> A is embedded in the hardly water-permeable layer 14. Therefore, the contaminated soil 20 is surrounded and closed by the impermeable wall 50 and the hardly permeable layer 14.

  The purification well device 110 has a purification device 112 and two wells 120 and 122. The two wells 120 and 122 are arranged at an interval so that the contaminated soil 20 is sandwiched between the inner sides surrounded by the impermeable wall 50. Further, the two wells 120 and 122 penetrate the hardly water-permeable layer 14 and reach the lower aquifer 16.

  These two wells 120 and 122 are capable of individually pumping and watering the upper aquifer 12 and the lower aquifer 16, respectively, and individually pouring and pumping water. It is the structure which can control the flow volume of this. An example of a specific configuration of the two wells 120 and 122 will be described later.

  In the purification well device 110, groundwater containing contaminants pumped from the upper aquifer 12 by one well 120 flows through the groundwater line 150, and the groundwater containing contaminants flowing through the groundwater line 150 is purified by the purification device 112. Is done.

  In addition, groundwater pumped from the lower aquifer 16 by one well 120 flows through the groundwater line 134, and groundwater pumped from the lower aquifer 16 by the other well 122 flows through the groundwater line 132. The groundwater line 132 and the groundwater line 134 merge to form a groundwater line 136, and the groundwater flowing through the groundwater line 136 is heat-exchanged with the heat medium by the heat exchanger 70. Groundwater heat-exchanged by the heat exchanger 70 flows through the groundwater line 138 and is pumped from the other well 122 to the aquifer 12. In addition, these groundwater lines 132, 134, 136, and 138 may be described as groundwater lines 132 to 138.

  Various known techniques can be applied to the purification method in the purification device 112. For example, a method to improve the water quality by sending air to volatilize volatile pollutants, a method to improve water quality by adding a purifier and reacting, a method to separate groundwater and pollutants by adsorbing pollutants, etc. Can be applied.

  Further, a cleaning agent may be added to the groundwater pumped to purify the contaminated soil 20 and water may be poured from the well 122. Alternatively, when biological purification is performed, water may be poured by mixing nutrient salts and oxygen, or water may be poured by newly mixing microorganisms.

  The heat exchanger 70 performs heat exchange between the groundwater flowing through the groundwater line 136 and the heat medium flowing through the heat medium line 72. In this embodiment, water is used as the heat medium. However, any medium that can exchange heat may be used. For example, a fluid such as oil or gas may be used. The heat medium is circulated through the heat medium line 72 by a pump or the like (not shown).

  The air conditioner 60 performs air conditioning in a structure such as an office building (not shown) built on the ground 10. The air conditioner 60 is configured to be able to use the heat energy of the heat exchanged heat medium circulating in the heat medium line 72. The air conditioner 60 is configured to be able to air-condition the structure using energy other than the heat energy of the heat medium circulating in the heat medium line 72 at the same time. In the present embodiment, the air conditioner 60 is used for cooling the data center in the structure throughout the year.

  Here, each arrow in FIG. 1 indicates the flow of groundwater in the aquifer 12 and the aquifer 16, the flow of groundwater in the groundwater lines 132 to 138 and the groundwater line 150, and the flow of the heat medium in the heat medium line 72. The flow of air in the air conditioner 60 is shown respectively.

  The control device 80 controls the operation of pumps and valves (not shown) of the groundwater lines 132 to 138 and the groundwater line 150 to control the amount of water injected and the amount of pumped water in the well 120 and the well 122. Further, the control device 80 controls a pump (not shown) of the heat medium line 72 and the like, and controls the direction in which the heat medium circulates through the heat medium line 72 and the flow velocity (flow rate per unit time).

  In each of the aquifer 12 and the aquifer 16, a measuring instrument 82 for measuring the state of groundwater is embedded. The measuring device 82 measures the water pressure of groundwater in the aquifers 12 and 16, the concentration of contaminants and purifiers in the groundwater, the quality of water such as dissolved oxygen, the temperature of groundwater, and the like. Further, the measurement result is sent to the control device 80. In FIG. 1, the measuring device 82 is provided in only one place in each layer (although illustrated), it may be provided in a plurality of places.

(Configuration example of well 120 and well 122)
As described above, the wells 120 and 122 are configured to individually control the flow rate of water injection and pumping with respect to the upper aquifer 12 and the lower aquifer 16. . Therefore, a configuration example of the wells 120 and 122 will be described here.

  As shown in FIG. 2, a first well steel pipe 230 and a second well steel pipe 232 are inserted into the well 122. Further, a water blocking material layer 234 is provided at a depth of the poorly permeable layer 14 in the well 122. Similarly, a first well steel pipe 240 and a second well steel pipe 242 are inserted into the well 120. Further, a water blocking material layer 244 is provided at a depth of the poorly permeable layer 14 in the well 122.

  The first well steel pipes 230 and 240 are arranged so that the tip portions 230A and 240A are located above the water blocking material layers 234 and 244, respectively. Moreover, the front end portions 230A and 240A of the first well steel pipes 230 and 240 are perforated pipes so that groundwater can be poured and pumped.

  The second well steel pipes 232 and 242 pass through the water blocking material layers 234 and 244 and are disposed so that the tip portions 232A and 242A are located below the water blocking material layers 234 and 2440. Moreover, the front-end | tip part 232A, 242A of the 2nd well steel pipe 232,242 is a perforated pipe | tube so that groundwater can be pumped.

  As shown in FIG. 1, the first well steel pipe 240 of the well 120 is connected to the groundwater line 150, and the well 120 second well steel pipe 242 is connected to the groundwater line 134. The first well steel pipe 230 of the well 122 is connected to the groundwater line 138, and the second well steel pipe 232 of the well 122 is connected to the groundwater line 132.

  In the wells 120 and 122, the configuration in which the upper aquifer 12 and the lower aquifer 16 can individually inject and pump water and control the flow rate is not limited to the above configuration. Any configuration may be used. Furthermore, the structure which has two wells, the well of the upper aquifer 12 and the well of the lower aquifer 16, may be sufficient.

<Action and effect>
Next, the effects of the present embodiment will be described while explaining a method for purifying contaminated soil.

  FIG. 3A in the initial state shows a state before purifying groundwater containing contaminants in the aquifer 12 surrounded by the impermeable wall 50. In addition, the temperature of groundwater at this time is the normal temperature water G of normal temperature (12 degreeC-20 degreeC). In addition, the code | symbol H means hot water higher temperature than the normal temperature water G so that it may mention later. The water temperature of the hot water H is not particularly limited as long as it is higher than that of the normal temperature water G, but in the present embodiment, it is 25 ° C to 35 ° C. Moreover, the temperature of the normal temperature water G (groundwater) is influenced by geological and geographical influences. For example, the temperature is low when the latitude is high, the temperature is high when the latitude is low, and the temperature is low near the foot of the mountain and high when close to the coastal plain.

  As shown in FIG. 1, FIG. 2, FIG. 3 (A) to FIG. 3 (E), ground water (normal temperature water G ()) containing pollutants pumped from the upper aquifer 12 in the first well steel pipe 240 of the well 120. 12 to 20 ° C.) is purified by the purification device 112. Purified groundwater is discharged.

  In addition, ground water (room temperature water G) pumped from the lower aquifer 16 by the second well steel pipe 232 of the well 120 and the second well steel pipe 242 of the well 122 is heat-exchanged with the heat medium by the heat exchanger 70 and heated water H Thus, water is poured from the first well steel pipe 230 of the well 122 into the upper aquifer 12.

  The temperature of the heat medium exchanged with the ground water (normal temperature water G) in the heat exchanger 70 is lowered, and the heat medium having the lowered temperature is used for cooling by the air conditioner 60 and is also used for cooling. The heat medium is sent to the heat exchanger 70. Then, the heat medium whose temperature has risen is heat-exchanged with the ground water as described above, so that the ground water becomes warm water H and is poured into the aquifer 12.

  Thus, while purifying the groundwater (normal temperature water G (12 degreeC-20 degreeC)) containing the pollutant pumped from the aquifer 12 with the 1st well steel pipe 240 of the well 120 with the purification apparatus 112, it is discharged. As shown in FIGS. 3 (A) to 3 (E), room temperature water G is pumped from the second well steel pipes 232, 242 of 120, 122 and hot water H is injected from the well 122, so that the aquifer gradually Twelve groundwaters are replaced by warm water H from room temperature water G. And finally, as shown in FIG.1 and FIG.3 (E), the groundwater of the aquifer 12 replaces the normal temperature water G with the warm water H. FIG.

  Thus, when the aquifer 12 becomes warm water H, when adding a cleaning agent to elute pollutants into groundwater, warm water H having a higher temperature effectively elutes pollutants and promotes purification. To do. In addition, when biological purification is performed, the microorganisms that perform purification become active and the growth rate of the microorganisms increases, which makes it easier for the microorganisms to produce enzymes that break down the pollutants. As a result, the pollutants are effectively purified. Purification is promoted. By becoming warm water H in this way, the purification efficiency of pollutants is improved and purification is promoted as compared with the case of room temperature water G.

  Furthermore, when the upper aquifer 12 becomes warm water H, the purifier 112 purifies the warm water H containing the contaminants pumped from the aquifer 12 by the first well steel pipe 240 of the well 120. And in purifying with warm water H in the purification apparatus 112, when sending air and volatilizing a volatile pollutant and improving water quality, since the one where temperature is higher tends to volatilize, purification efficiency improves. Alternatively, also in the case of improving the water quality by adding a purification agent and reacting, the higher the temperature, the higher the reaction rate, so that the purification efficiency is improved. That is, purification with warm water H improves purification efficiency and promotes purification.

  In addition, you may utilize the thermal energy of the warm water H which is purified and discharged | emitted by the purification apparatus 112. FIG. For example, it may be used for winter heating or a heated pool. 1 may be connected to the groundwater line 138 by a connecting line 152 indicated by a broken line in FIG. 1, and a part or all of the hot water H may be poured from the second well steel pipe 232 of the well 122 into the aquifer 12.

  Here, the control device 80 compares the measurement result (progress of the removal of the pollutant) and the pollutant removal plan with the measuring device 82 that measures the state of the groundwater containing the pollutant in the contaminated soil 20, and the groundwater line. The operation of pumps and valves (not shown) of 132 to 138 and the groundwater line 150 is controlled to control the amount of water injected and the amount of pumped water in the wells 120 and 122. For example, when the concentration of pollutants is higher than planned (if the progress of purification is slower than planned), the amount of water injection or pumping is increased to increase the movement speed of groundwater. It also increases the amount of cleaning agents, nutrients, oxygen and microorganisms.

  Further, the control device 80 controls the flow rate of the heat medium that exchanges heat in the heat exchanger 70, that is, the flow rate flowing through the heat medium line 72, according to the flow rate of the pumped ground water (room temperature water G), that is, the ground water line 136. To do. That is, when the flow rate of the groundwater line 136 is large, the flow velocity flowing through the heat medium line 72 is increased, and when the flow rate of the groundwater line 136 is small, the flow velocity flowing through the heat medium line 72 is decreased. Thereby, the air conditioning efficiency in the air conditioner 60 is improved.

  In this way, the exhaust heat (warm heat) generated by the cooling operation of the air conditioner 60 is purified by the room temperature water G by pouring the ground water into the aquifer 12 through the heat medium and the heat exchanger 70 as the warm water H. Compared to the case, the purification efficiency of the contaminated soil 20 is improved.

  In addition, the exhaust heat (warm heat) emitted from the air conditioner 60 is made warm water H and poured into the aquifer 12 to purify it, thereby integrating the purification of the contaminated soil 20 and the air conditioning of the air conditioner 60. Energy efficiency is increased.

<Modification>
Next, a modification of the first embodiment will be described.
In the above embodiment, the air conditioner 60 is always used for cooling (through the year). However, a case where heating is performed by the air conditioner 60 in a predetermined period such as temporarily or in winter will be described. The configuration of the groundwater line shown in FIG. 4 (first modified example) and FIG. 5 (second modified example) is to change the groundwater line in FIG. 1 or change it with a valve, or change the operation of the pump. Can be realized. In addition, the code | symbol C means cold water lower temperature than the normal temperature water G so that it may mention later. The water temperature of the cold water C is not particularly limited as long as it is lower than that of the room temperature water G, but is 0 ° to 10 ° C. in the present embodiment.

(First modification)
In the purification facility 101 of the first modified example shown in FIG. 4, the purification well device 111 does not pour ground water (room temperature water G) pumped from the lower aquifer 16 into the upper aquifer 12, Groundwater (warm water H) containing pollutants pumped from the aquifer 12 is purified by the purifier 112 and poured into the aquifer 12. In the heat exchanger 70, the ground water (room temperature water G) pumped from the lower aquifer 16 is exchanged with the heat medium to change the ground water into cold water C and raise the temperature of the heat medium. And the air conditioner 60 heats using the heat medium which heat-exchanged with the heat exchanger 70 and the temperature rose.

  More specifically, groundwater (warm water H) containing pollutants pumped from the upper aquifer 12 in the first well steel pipe 240 of the well 120 flows through the groundwater line 150 and pollutants flowing through the groundwater line 150 The contained ground water (warm water H) is purified by the purification device 112. The purified groundwater (warm water H) flows through the groundwater line 154 and is poured into the aquifer 12 from the first well steel pipe 230 of the well 122.

  The groundwater lines 150 and 154 on the ground and the purification device 112 are insulated by a heat insulating material. Therefore, the warm water H pumped from the upper aquifer 12 is poured into the aquifer 12 again as the warm water H with almost no temperature drop.

  Moreover, since the hot water H containing a pollutant is purified by the purification device 112, the purification efficiency is improved and the purification is promoted.

  The groundwater pumped from the lower aquifer 16 by the well 120 and the well 122 is heat-exchanged with the heat medium by the heat exchanger 70 to become cold water C and discharged from the groundwater line 139.

  The temperature of the heat medium exchanged with the ground water (normal temperature water G) in the heat exchanger 70 increases, and the heat medium whose temperature has been increased is used for heating by the air conditioner 60 and is also used for heating and the temperature is decreased. The heat medium is sent to the heat exchanger 70. Then, as described above, the heat medium having the lowered temperature is heat-exchanged with the ground water, so that the ground water becomes cold water C and is discharged. In addition, you may use the cold water C discharged | emitted for cooling with another air conditioner via another heat exchanger.

(Second modification)
In the purification facility 103 of the second modified example shown in FIG. 5, the purification well device 113 does not send groundwater (room temperature water G) pumped from the lower aquifer 16 to the heat exchanger 70, and the upper aquifer 12 is poured into water. Further, ground water (warm water H) containing pollutants pumped from the upper aquifer 12 is purified by the purification device 112 and heat exchange is performed with the heat medium by the heat exchanger 70 to increase the temperature of the heat medium. . And the air conditioner 60 heats using the heat medium which heat-exchanged with the heat exchanger 70 and the temperature rose.

  More specifically, ground water (warm water H) containing pollutants is pumped from the aquifer 12 through the first well steel pipe 230 from the well 122. The hot water H is configured to flow in the reverse direction of the groundwater line 138 and be purified by the purification device 112. Then, the purified hot water H is heat-exchanged with the heat medium in the heat exchanger 70 to be discharged as cold water C.

  Thus, since the hot water H containing a contaminant is purified by the purification device 112, the purification efficiency is improved and the purification is promoted.

  In addition, the temperature of the heat medium exchanged with the groundwater (warm water H) by the heat exchanger 70 rises, and the heat medium whose temperature has risen is used for heating by the air conditioner 60 and is also used for heating to lower the temperature. The heated heat medium is sent to the heat exchanger 70. Then, as described above, the heat medium having the lowered temperature is heat-exchanged with the ground water, so that the ground water becomes cold water C and is discharged. In addition, you may use this cold water C for air_conditioning | cooling with a separate air conditioner (and heat exchanger).

  In addition, the groundwater (room temperature water G) pumped from the lower aquifer 16 by the well 120 and the well 122 merges in the groundwater line 156 and is injected into the upper aquifer 12 from the first well steel pipe 240 of the well 120. Is done.

  Here, the hot water H is pumped from the upper aquifer 12 by the first well steel pipe 230 of the well 122, and the room temperature water G is discharged from the lower aquifer 16 by the second well steel pipes 232 and 242 of the wells 120 and 122. The groundwater in the aquifer 12 is gradually replaced from the warm water H to the ordinary temperature G by injecting normal temperature water G from the well 122 into the aquifer 12, that is, from FIG. 3 (E) to FIG. A). And finally, as shown in FIG.1 and FIG.3 (A), it can carry out until the groundwater of the aquifer 12 is replaced with the normal temperature water G from the warm water H. FIG.

<Second embodiment>
The purification equipment of the contaminated soil which concerns on 2nd embodiment of this invention is demonstrated. In addition, the same code | symbol is attached | subjected to the member same as 1st embodiment, and the overlapping description is abbreviate | omitted.

[soil]
As shown in FIG. 6, in this embodiment, contaminated soil 22 containing contaminants also exists in the lower aquifer 16 in the ground 11. Contaminants include organic compounds represented by trichlorethylene and benzene, metal compounds such as hexavalent chromium and arsenic, inorganic compounds such as cyan, and mineral oils represented by gasoline and light oil. However, the contaminated soil 22 in the lower aquifer 16 has a lower contamination concentration than the contaminated soil 20 in the upper aquifer 12.

[Purification equipment]
As shown in FIG. 6, the purification facility 200 includes a water shielding wall 250, a purification well device 210, a heat exchanger 70, an air conditioner 60, and a control device 80. In addition, since the heat exchanger 70 and the air conditioner 60 are the structures similar to 1st embodiment, description is abbreviate | omitted.

  The impermeable wall 250 of the purification facility 200 is formed so as to penetrate the hardly permeable layer 14, and the lower end portion 250 </ b> A reaches the lower aquifer 16 and is positioned below the contaminated soil 22. Therefore, the impermeable wall 250 is formed so as to surround the contaminated soil 20 and the contaminated soil 22, and the contaminated soil 20 and the contaminated soil 22 are surrounded by the impermeable wall 250 and closed.

  In addition, the purification well device 210 purifies both the groundwater containing the pollutant pumped from the upper aquifer 12 and the groundwater containing the pollutant pumped from the lower aquifer 16 with the purifier 112. It is configured as follows.

  Specifically, the hot water H flowing through the groundwater line 138 on the downstream side of the heat exchanger 70 is configured to be purified by the purification device 112. That is, the ground water (room temperature water G) containing the pollutant pumped from the lower aquifer 16 is heat-exchanged by the heat exchanger 70 to become the hot water H, and the warm water H (ground water containing the pollutant) is purified. Then, the water is poured into the upper aquifer 12 from the first well steel pipe 230 of the well 122.

  Note that the lower aquifer 16 contaminated soil 22 has a lower contamination concentration than the contaminated soil 20 of the upper aquifer 12. Therefore, even if only groundwater is pumped from the aquifer 16 (no water is poured into the aquifer 16), the contaminated soil 22 can be purified.

<Action and effect>
In the first embodiment, there is a contaminated soil 22 containing pollutants in the lower aquifer 16 and purifying groundwater (room temperature water G) containing pollutants pumped from the aquifer 16. Since it is the same except adding to an effect, detailed description is abbreviate | omitted.

<Modification>
Next, a modification of the second embodiment will be described.
Similarly to the modification of the first embodiment, a modification of the second embodiment will be described for a case where heating is performed by the air conditioner 60 temporarily or during a predetermined period such as winter. Further, similarly to the first embodiment, the configuration of the groundwater line shown in FIG. 7 (first modified example) and FIG. 8 (second modified example) is changed by connecting the groundwater line in FIG. Or by changing the operation of the pump.

(First modification)
In the purification facility 201 of the first modification shown in FIG. 7, the purification well device 211 does not inject the ground water (room temperature water G) pumped from the lower aquifer 16 into the upper aquifer 12, Groundwater (warm water H) containing pollutants pumped from the aquifer 12 is purified by the purifier 112 and poured into the aquifer 12. In the heat exchanger 70, the ground water (room temperature water G) pumped from the lower aquifer 16 is exchanged with the heat medium to change the ground water into cold water C and raise the temperature of the heat medium. And the air conditioner 60 heats using the heat medium which heat-exchanged with the heat exchanger 70 and the temperature rose.

  Further, the purification well device 211 purifies both the groundwater containing the pollutant pumped from the upper aquifer 12 and the groundwater containing the pollutant pumped from the lower aquifer 16 with the purifier 112. It is configured as follows.

  More specifically, groundwater (warm water H) containing pollutants pumped from the upper aquifer 12 in the first well steel pipe 240 of the well 220 flows through the groundwater line 150 and pollutants flowing through the groundwater line 150 are removed. The contained ground water (warm water H) is purified by the purification device 112. The purified groundwater (warm water H) is poured into the aquifer 12 from the first well steel pipe 230 of the well 122.

  In addition, since the hot water H containing a contaminant is purified by the purification device 112, the purification efficiency is improved and the purification is promoted.

  The groundwater pumped from the aquifer 16 by the well 120 and the well 122 is heat-exchanged with the heat medium by the heat exchanger 70, becomes cold water C, flows through the groundwater line 139, is purified by the purification device 112, and then discharged.

  The temperature of the heat medium exchanged with the ground water (normal temperature water G) in the heat exchanger 70 increases, and the heat medium whose temperature has been increased is used for heating by the air conditioner 60 and is also used for heating and the temperature is decreased. The heat medium is sent to the heat exchanger 70. Then, as described above, the heat medium whose temperature has been lowered is exchanged with the groundwater, so that the groundwater becomes the cold water C and is purified by the purification device 112 and discharged. In addition, you may use the cold water C discharged | emitted for air_conditioning | cooling with a separate air conditioner (and heat exchanger).

(Second modification)
In the purification facility 203 of the second modified example shown in FIG. 7, the purification well device 213 does not send groundwater (room temperature water G) pumped from the lower aquifer 16 to the heat exchanger 70, and the upper aquifer 12 is poured into water. In addition, ground water (warm water H) containing contaminants pumped from the upper aquifer 12 is purified by the purifier 112 and heat exchange is performed with the heat medium by the heat exchanger 70 to cool the ground water (warm water H) to cold water. C and the temperature of the heat medium is increased. And the air conditioner 60 heats using the heat medium which heat-exchanged with the heat exchanger 70 and the temperature rose.

  Further, the purification well device 211 purifies both the groundwater containing the pollutant pumped from the upper aquifer 12 and the groundwater containing the pollutant pumped from the lower aquifer 16 with the purifier 112. It is configured as follows.

  More specifically, groundwater (warm water H) containing pollutants is pumped from the upper aquifer 12 through the first well steel pipe 230 from the well 122. The hot water H is configured to flow in the reverse direction through the groundwater line 138 and be purified by the purification device 112. The purified hot water H is heat-exchanged with the heat medium in the heat exchanger 70 to be discharged as cold water C.

  Thus, since the hot water H containing a contaminant is purified by the purification device 112, the purification efficiency is improved and the purification is promoted.

  In addition, the temperature of the heat medium exchanged with the groundwater (warm water H) by the heat exchanger 70 rises, and the heat medium whose temperature has risen is used for heating by the air conditioner 60 and is also used for heating to lower the temperature. The heated heat medium is sent to the heat exchanger 70. Then, as described above, the heat medium having the lowered temperature is heat-exchanged with the ground water, so that the ground water becomes cold water C and is discharged. In addition, you may use this cold water C for air_conditioning | cooling with a separate air conditioner (and heat exchanger).

  In addition, the ground water (room temperature water G) pumped from the lower aquifer 16 by the well 120 and the well 122 joins in the ground water line 156 and is further purified by the purification device 112, and then the first well steel pipe of the well 120. Water is poured from 240 into the upper aquifer 12.

  Here, the hot water H is pumped from the upper aquifer 12 by the first well steel pipe 230 of the well 122, and the room temperature water G is discharged from the lower aquifer 16 by the second well steel pipes 232 and 242 of the wells 120 and 122. The groundwater in the aquifer 12 is gradually replaced from the hot water H to the normal temperature water G, that is, from FIG. 3 (E). 3 (A). And finally, as shown in FIG.1 and FIG.3 (A), it can carry out until the groundwater of the aquifer 12 is replaced with the normal temperature water G from the warm water H. FIG.

<Others>
The present invention is not limited to the above embodiment.

  For example, in the said embodiment, although the impermeable walls 50 and 250 are formed so that the circumference | surroundings of the contaminated soil 20 and 22 may be enclosed, it is not limited to this. A structure in which a part of the impermeable wall is opened may be used. Furthermore, the structure of the purification equipment which does not have a water-impervious wall may be sufficient.

  For example, in the said embodiment, although the heat medium heat-exchanged with groundwater was utilized with the air conditioner 60 provided in the structure which is not shown in figure, it is not limited to this. You may utilize for cooling of apparatuses and facilities other than an air conditioner. For example, you may utilize for cooling of a boiler etc. Further, for example, the pumped-up groundwater may be purified with a purification device before heat exchange with the heat exchanger.

  Furthermore, it cannot be overemphasized that it can implement with a various aspect in the range which does not deviate from the summary of this invention.

  The present invention is not limited to the above embodiment. Needless to say, the present invention can be implemented in various modes without departing from the scope of the present invention.

14 Difficult-permeable layer 12 Aquifer (first aquifer)
16 Aquifer (second aquifer)
60 Air conditioner (an example of utilization means)
70 Heat Exchanger 80 Control Device 100 Purification Facility 101 Purification Facility 103 Purification Facility 110 Purification Well Device 112 Purification Device 111 Purification Well Device 113 Purification Well Device 200 Purification Facility 201 Purification Facility 203 Purification Facility 210 Purification Well Device 211 Purification Well Device 213 Purification Well equipment

Claims (7)

The groundwater containing pollutants is pumped from the first aquifer above the hardly permeable layer and purified by a purification device, and the groundwater is pumped from the second aquifer below the hardly permeable layer and the first aquifer A purification well device for injecting water into the aquifer,
A heat exchanger for exchanging heat between the groundwater pumped from the second aquifer and the heat medium to make the groundwater warm and lower the temperature of the heat medium;
Cooling using the heat medium whose temperature has been lowered by heat exchange in the heat exchanger, and utilization means for sending the heat medium whose temperature has risen after use to the heat exchanger;
Contaminated soil purification equipment comprising. The purification well device is configured to purify both the groundwater containing pollutants pumped from the first aquifer and the groundwater containing pollutants pumped from the second aquifer with the purifier. Configured to,
The purification equipment of the contaminated soil of Claim 1. Pumping groundwater containing pollutants from the first aquifer above the hardly permeable layer and purifying it with a purification device, pouring the groundwater purified by the purification device into the first aquifer, and A purification well device capable of both pumping ground water from the second aquifer below the permeable layer and pouring the first aquifer,
Before the groundwater pumped from the second aquifer is poured into the first aquifer, heat is exchanged with the heat medium to make the groundwater warm and lower the temperature of the heat medium; The groundwater pumped from the second aquifer and the heat medium are heat-exchanged to make the groundwater cold water and to increase the temperature of the heat medium . A heat exchanger,
Cooling using the heat medium whose temperature has been lowered by heat exchange in the heat exchanger and sending the heat medium whose temperature has risen after use to the heat exchanger; and heat exchange in the heat exchanger Heating using the heat medium having an increased temperature and sending the heat medium having a decreased temperature after use to a heat exchanger ;
Equipped with a, purification equipment of contaminated soil. The groundwater containing pollutants is pumped from the first aquifer above the hardly permeable layer and purified by a purification device, and the groundwater is pumped from the second aquifer below the hardly permeable layer and the first aquifer A purification well device for injecting water into the aquifer,
Before the groundwater pumped from the second aquifer is poured into the first aquifer, heat exchange is performed with the heat medium to make the groundwater warm and to reduce the temperature of the heat medium. When, both raising the temperature of the heating medium as well as in cold water the groundwater performs heat exchange between the ground water is pumped and purified by the purification apparatus from the first aquifer and the heat medium A heat exchanger capable of
Cooling using the heat medium whose temperature has been lowered by heat exchange in the heat exchanger and sending the heat medium whose temperature has risen after use to the heat exchanger; and heat exchange in the heat exchanger Heating using the heat medium having an increased temperature and sending the heat medium having a decreased temperature after use to a heat exchanger ;
Comprising a purification equipment contaminated soil.   The purification well device is configured to purify both the groundwater containing pollutants pumped from the first aquifer and the groundwater containing pollutants pumped from the second aquifer with the purifier. Configured to,
  The purification equipment of the contaminated soil of Claim 3 or Claim 4.   A pumping process for pumping groundwater containing pollutants from the first aquifer above the hard-permeable layer;
  A first purification step of purifying the groundwater pumped from the first aquifer with a purification device;
  Heat exchanging step of pumping groundwater from the second aquifer below the hardly permeable layer, exchanging heat with the heat medium by a heat exchanger to lower the temperature of the heat medium and turning the groundwater into hot water When,
  A water pouring step of pouring the groundwater pumped from the second aquifer and heat-exchanged by the heat exchanger into warm water;
  A cooling step of cooling using the heat medium whose temperature has been reduced by heat exchange in the heat exchanger;
  A method for purifying contaminated soil.   Before the water injection step, the second purification step of purifying the groundwater pumped from the second aquifer with the purification device,
  The method for purifying contaminated soil according to claim 6.

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