WO2016147419A1 - Drilling/power-generating/recovering apparatus for enabling seafloor hydrothermal generation and recovery of useful substances - Google Patents

Abstract

[Problem] To enable hydrothermal generation under a seafloor by drilling, into a hydrothermal reservoir below a seafloor located from 1000 m to 1500 m undersea, a hydrothermal well for collecting hot water, or by using hot water from a naturally generated hydrothermal chimney, and enable recovery, from the hot water that has been pumped up, of substances (e.g., silica, lithium, and the like in addition to useful metals) which are useful for society. [Solution] A seafloor geothermal binary power-generating apparatus formed by housing, in a water-tight seafloor geothermal binary power-generating apparatus case: an open heat exchanger that is in direct contact with hot water jetted from a hydrothermal vent in a seafloor hydrothermal deposit and is for boiling an internal secondary medium; a pipe for transporting the boiled secondary medium to a steam turbine; a pipe for transporting, to a condenser, the secondary medium discharged from the steam turbine; an open heat exchanger for condensing the second medium discharged from the steam turbine through heat exchange between the secondary medium and surrounding seawater; the steam turbine for obtaining rotating force using force of the boiled secondary medium; a power generator for converting the rotating force of the steam turbine into electricity; and a transformer for rectifying AC electricity obtained from the power generator into commercial power, and boosting the power to a transmission voltage.

Description

Drilling, power generation and recovery equipment that enables submarine hydrothermal power generation and recovery of useful substances

The present invention relates to an excavation / power generation / recovery device that enables hot water power generation and recovery of useful substances contained in the hot water using hot water ejected from the seabed of 1000 m to 1500 m, and processing thereof.

In recent years, a survey of ocean hydrothermal waters near Japan has shown that, for example, the Deep Sea Expedition “CHIKYU” operated by the Japan Agency for Marine-Earth Science and Technology (JAMSTEC) As the 331st research voyage of the Deep Sea Drilling Project (IODP), “Okinawa hydrothermal submarine life zone drilling-1” was carried out, at a point of 100 km northwest of Okinawa main island (Iheya Kitaoka), at a depth of 1000 m. Discovered a hot pool of hot water that spreads, and in this region, we have encountered a large pool of hot water exceeding 200 ° C by excavation a few tens of meters below the seabed, and only a value as a metal resource (seafloor hydrothermal deposit) It is known that it can also be expected as a treasure trove of geothermal energy. In addition, hot water ejected from the seabed contains useful substances, and development of a technique for extracting the useful substances is required.

As a technique for using this kind of hot water jetted on the deep sea bottom and recovering useful substances, for example, a technique disclosed in JP-T-2010-534777 is known.
The disclosure of JP-T-2010-534777 relates to the invention title “Hot-water energy and deep-sea resource recovery system”, and “Surely used for any other mechanism suitable for heat utilization, such as power generation or desalination of water” It is configured to direct superheated hydrothermal fluid flow to the surface by a simple mechanism, and the device can also recover metal and mineral deepwater resources simultaneously with or separately from thermal energy recovery. In the technical field of “providing a reliable mechanism” (see paragraph number 0001 of the publication), “a system for recovering resources contained in a hot water fluid from a hot water ejection hole, comprising: Or a collecting means for collecting a resource containing the hydrothermal fluid from the hydrothermal vent, and (b) an ocean surface to receive the hydrothermal fluid or a resource contained therein. A recovery station located at or above a surface; and (c) delivering the hydrothermal fluid or resources contained in the fluid from the jets to the recovery station at or above the ocean surface, And a delivery means for protecting the fluid or the resources contained in the fluid from the surrounding marine situation without significant degradation of the hydrothermal fluid or the resources of the fluid. In the scope of claim 1, etc.) "The recovered hydrothermal fluid is then used as a source of heat for power generation, desalination or any other use of thermal energy. It can also be supplied simultaneously or separately to a resource recovery apparatus for removing metal and chemical products. ”(Paragraph number 001 of the specification of the publication) Reference).

FIG. 4 is a flowchart showing the use of hydrothermal fluid as a source of power generation, desalination, or any other use of thermal energy, as well as resource recovery disclosed as FIG. 4 in JP 2010-534777. FIG. In FIG. 4, reference numeral 110 is a frame, 111 is a fluid, 112 is a chimney, 113 is a pipe, 116 is a marine surface, 117 is an annular levitation device, 118 is a seabed, and 119 is a heat differential strengthening pipe. , 124 is a platform, 126 is a return pipe, 132 is a cold water pump, 133, 150, 151, 152 is a ring, 154 is a leg, 172 is a conical shape, 210 is a hydrothermal power unit, 250 is The desalination facility 252 is a mining facility (resource recovery device) (in order to clarify that the sign is the prior art, the present applicant changed the description to three digits).

As shown in FIG. 4, the “hot water energy and deep sea resource recovery system” disclosed in JP-T-2010-534777, which has the above-described configuration, once pumps hot water to the ocean surface (116). In addition, power generation is performed by a device installed on the ocean surface 116, not at the depth of the deep sea, and energy loss during pumping up to the sea level is unavoidable and can be said to be efficient. There is nothing.

JP 2010-534777 gazette

Therefore, the present invention excavates a hot water collecting hot water well in a hot water pool under a relatively shallow depth of 1000 m to 1500 m below the sea level, or uses hot water from a naturally generated hot water chimney. Then, hydrothermal power generation is performed under the seabed, and it is possible to recover useful substances (e.g., rare metals, silica, lithium, etc.) from the hot water pumped up. The purpose is to provide a useful substance recovery device.

[Correction 30.04.2015 under Rule 91]
In order to achieve the above object, the invention according to claim 1 of the present application is directed to a high-temperature drill bit for drilling a hole in a submarine hydrothermal deposit, and debris that transmits rotational force to the bit and accumulates at the bottom of the hole. A digging pipe that discharges with the digging water sent by the pump, a digging water pump that feeds the digging waste into the digging pipe with the surrounding seawater, and the digging pipe is lifted and lowered while the uppermost part of the digging pipe is held It is equipped with an automatic elevating type top drive excavator that rotates with a drill to transmit the rotational force to the excavation bit, a power supply for supplying power, and a control / power supply tower that excavates pre-programmed points, for connection up and down A plurality of drill pipes necessary for excavation are mounted, and when the drill pipes being excavated to the excavation surface by the automatic elevating type top drive excavator, the mounted drill pipes are sequentially installed. Automatic digging that can be connected to the top Wherein the connecting device and are hydrothermal fluid well drilling apparatus to the seabed becomes mounted on self-propelled crawler self-propelled by caterpillar.
Further, the invention according to claim 2 of the present application is directed to an open heat exchanger for directly contacting the hot water ejected from the hydrothermal vent of the submarine hydrothermal deposit to boil the secondary medium inside, and the boiling A pipe for transporting the secondary medium to the steam turbine, a pipe for transporting the secondary medium exhausted from the steam turbine to the condenser, and the secondary medium exhausted from the steam turbine heated by the surrounding seawater. An open-type heat exchanger for exchanging and condensing, a steam turbine for obtaining a rotational force by the force of the boiled secondary medium, a generator for converting the rotational force of the steam turbine to electricity, and the power generation The substation that rectifies the AC electricity obtained by the machine into commercial power and boosts the voltage to the transmission voltage is a submarine geothermal binary power generation device housed in a casing for a watertight submarine geothermal binary power generation device. To do.
Furthermore, the invention according to claim 3 of the present application is the subsea geothermal binary power generation device according to claim 2, in which the open heat exchanger installed immediately above the hot water outlet of the submarine hydrothermal deposit, and the secondary medium The open heat exchangers that exchange heat with surrounding seawater for condensation are disposed so as to protrude from both side surfaces of the watertight submarine geothermal binary power generator casing.
Further, the invention according to claim 4 of the present application is an apparatus for recovering useful metal resources such as an artificial excavation hot water hole or a hot water chimney on the seabed to a recovery apparatus on a floating body installed on the ocean. It is a hot water-containing useful substance recovery device in which one or a plurality of basic constituent units composed of a reaction tank, a hot water pump, a seawater pump, a chemical solution adjusting device, and a reverse osmosis device that are temperature-controlled by a heat exchanger are superimposed. It is characterized by.
Then, the invention according to claim 5 of the present invention collects hot water from an artificial excavation hot water hole or hot water chimney on the seabed on the ocean using the hot water-containing useful substance recovery device of the invention according to claim 4. Adjustable to the treatment temperature at which the useful substance to be recovered reacts with the characteristic properties that can be separated by the reverse osmosis membrane with the possible seawater, and then the useful material can react with the characteristic properties that can be separated by the reverse osmosis membrane. It is characterized by being a hot water-containing useful substance recovery treatment method in which a step of recovering a target useful substance is performed one time or a plurality of times after adjusting with a chemical solution and being separated by a reverse osmosis membrane.

Each invention of the present application configured as described above has the following specific effects.
(1) According to the submarine hot water well excavation apparatus according to the present invention, the seabed is excavated using seawater having a water pressure of about 10 to 15 MPa under the sea surface of about 1000 m to 1500 m. Since the generated excavated debris (rock fragments) can be discharged as it is by the surrounding seawater as muddy water, excavation efficiency is excellent.
(2) By obtaining in combination with the submarine thermal water well drilling device according to the present invention and the submarine geothermal binary power generation device, etc. In addition, fuel costs for excavation work can be reduced.

(3) Unlike geothermal use on the ground, there are no location problems in geothermal use, such as the danger of exhausting hot springs from natural parks and hot springs.
(4) Since the submarine geothermal binary power generator is modularized and assembled on land, the work on site can be reduced for installation in the submarine hot water mine, and power can be generated simply by installing it.
(5) Just by installing the evaporator of the binary power generator just above the hot water jet hole, the condenser placed on the opposite side is placed in cold seawater, and it is bothered to cool the condenser with cold water for cooling. The heat exchange is extremely simple compared to the equipment such as geothermal power generation on the ground.

(6) If a basic structural unit is prepared for a reaction vessel, a hot water pump, a seawater pump, a chemical adjustment device, and a reverse osmosis device that are well controlled by a set of heat exchangers, the processing temperature and processing of the recovered material By appropriately determining the drug, the target recovery substance can be easily recovered from hot water.
(7) By installing a plurality of constituent units in a superimposed manner, it is possible to collect many kinds of useful substances.

FIG. 1 shows an implementation for realizing a submarine hydrothermal power generation and a hot water-containing useful substance recovery apparatus, which is an embodiment for implementing the submarine hydrothermal power generation and the hot water-containing useful substance recovery apparatus according to the present invention. It is a figure which shows the outline of the "submarine hot water well drilling apparatus" concerning Example 1. FIG. FIG. 2 is a diagram illustrating an outline of a submarine geothermal binary power generation apparatus according to the second embodiment that uses hot water from a naturally occurring hot water chimney or an artificially drilled well. FIG. 3 is a diagram illustrating a processing concept of the hot water-containing useful substance recovery device according to the third embodiment that recovers a useful substance from hot water such as hot water or hot water chimney used for submarine geothermal binary power generation, The reaction tank, the hot water pump, the seawater pump, the chemical liquid adjusting device, and the reverse osmosis device, the temperature of which is controlled by the set of heat exchangers, is a combination of three basic constituent units. FIG. 4 is a flowchart showing the use of hydrothermal fluid as a source of power generation, desalination, or any other use of thermal energy, as well as resource recovery disclosed as FIG. 4 in JP 2010-534777. FIG.

An embodiment will be described in detail with reference to the drawings as a mode for carrying out a submarine hydrothermal power generation and hot water-containing useful substance recovery device according to the present invention.

(Submarine thermal water well drilling equipment)
First, an implementation for realizing a submarine hydrothermal power generation and a hot water-containing useful substance recovery device, which is an embodiment for implementing the submarine hydrothermal power generation and the hot water-containing useful material recovery device according to the present invention. The “submarine thermal water well drilling apparatus” according to Example 1 will be described with reference to the drawings.
In the case of submarine hydrothermal power generation, hot water from naturally occurring hot water chimneys, etc. may be used, but drilling of hot water wells is essential for continuous use. Therefore, the “seafloor hot water well drilling apparatus” according to the first embodiment for drilling a hot water well on the seabed will be described with reference to the drawings.

FIG. 1 shows an implementation for realizing a submarine hydrothermal power generation and a hot water-containing useful substance recovery apparatus, which is an embodiment for implementing the submarine hydrothermal power generation and the hot water-containing useful substance recovery apparatus according to the present invention. It is a figure which shows the outline of the "submarine hot water well drilling apparatus" concerning Example 1. FIG.
In FIG. 1, reference numeral 1 is a submarine hydrothermal drilling apparatus according to the first embodiment, 2 is a high temperature excavation bit for drilling holes in the submarine hydrothermal deposit (H), and 3 is the tip bit. Drilling pipe that transmits the rotational force to 2 and discharges the debris (rock fragments) accumulated at the bottom of the hole with the drilling water sent by the pump. The excavation water pump 5 for feeding the seawater directly into the excavation pipe ascends and descends the excavation pipe 3 and holds the uppermost part of the excavation pipe 3 during the excavation and rotates the excavation bit 2. An automatic elevating type top drive excavator that transmits rotational force to the vehicle, 6 is equipped with a power supply that provides power, and an unmanned control / power supply tower that excavates a pre-programmed point, and 7 is a screw for connecting up and down A plurality of drill pipes 3 having the necessary number for excavation are mounted, At the stage where the digging pipe 3 being excavated by the automatic lift-type top drive excavating device 5 has been excavated to the excavation surface, one of the mounted digging pipes 3 (for example, the digging pipe 3b) is removed. An automatic digging pipe connecting device 8 that can be taken out and connected sequentially to the upper part of the digging pipe 3 (for example, the digging pipe 3a), is a self-propelled infinity that can run on the seabed by an endless track. Railcar, 9 is seawater, 10 is a power transmission / communications cable connected to the sea, and H is a submarine hydrothermal deposit.

This type of drilling rig consists of devices that can be fully automated at the bottom of the sea, as well as drilling that requires little manpower, as used in the deep sea drilling vessel Chikyu. Is done.
That is, in the submarine hot water well drilling apparatus 1 according to the first embodiment, the seabed is about 1000 m to 1500 m below the sea level, and the drilling depth from the bottom of the sea bottom is about 100 to 200 m. Drilling under the sea floor using the generated power. For excavation, the BMS (boring machine system) using an underwater automatic excavation robot is used to excavate the artificial vent hole in a non-casing. The excavation location, the excavation depth, and the like are determined based on the submarine structure / underground structure, and the submarine hot water excavation apparatus 1 according to the first embodiment is installed, operated, and driven by a preprogrammed execution command.

The excavation includes an electric motor (not shown) and the excavation pump 4 together with the excavation pump 4 by the upper lift excavator 5 to grasp and rotate the uppermost portion of the excavation pipe 3 so that the excavation bit 2 at the front end is rotated. This is done by rotating and crushing rocks in the formation.
In this case, in order to hold the borehole wall of the drilling well during drilling, a steel pipe that is slightly smaller than the diameter of the drilled well that was first drilled is gradually inserted into the drilling well, and the drill bit 2 is used by using the pump 4. You may make it carry out while discharging the crushed debris from the steel pipe upper part to the seabed.
Further, in the submarine hot water well drilling apparatus 1 according to the first embodiment, the drilling is performed at about 1000 m to 1500 m below the sea level, and what is characteristic is the seawater 9 around 1000 m to 1500 m below the sea level and a water pressure of about 10 to 15 MPa. Since the drilling water pump 4 is driven by the power supply from the ocean and the drilling mud generated after the drilling is discharged to the sea floor as it is, there is no need to circulate a long distance through the mud pipe as in the case of excavation on the ground. Excellent excavation efficiency.

Although not shown in FIG. 1, a monitoring device (not shown) that can monitor the excavation state from the sea is provided so as to be constantly monitored.
Furthermore, in the submarine thermal water well drilling apparatus 1 according to the first embodiment, power required for drilling is supplied from an offshore vessel, which is realized in combination with a submarine geothermal binary power generation apparatus described below. If the power required for excavation is obtained from the power generation equipment installed in the excavation hole excavated in the vicinity, the submarine thermal water well excavating apparatus 1 according to the first embodiment automatically performs excavation without manpower. Therefore, labor costs and fuel costs related to excavation work can be reduced. Of course, because it is an underwater facility, water tightness and materials are inevitably expensive, but there are many parts that can reduce costs compared to onshore, so systematic modularization and systematization of construction methods As a whole, it is possible to keep drilling costs at the same level as onshore.

If such a hot water well is drilled in a shallow area of about 1000m to 1500m below the seabed, many wells can be drilled in a very short time even at the present time (as of February 2013). In addition to being able to shorten it, it is under the sea floor, so it does not require a large amount of energy even when using a pump under high water pressure, and there is abundant cooling water used for cooling equipment around it Can be used. Also, unlike geothermal use on the ground, there are no location problems in geothermal use, such as the danger of exhaustion of hot springs from natural parks and hot springs.

(Submarine geothermal binary power generator)
Next, in order to implement the submarine hydrothermal power generation and the hot water-containing useful substance recovery apparatus according to the present invention that uses hot water from a hot water chimney or black smoker, etc., when a hot water mine is excavated or An outline of “submarine hydrothermal power generation” according to Example 2, which is another example of the embodiment, will be described with reference to the drawings.

FIG. 2 is a diagram illustrating an outline of a submarine geothermal binary power generation apparatus according to the second embodiment that uses hot water from a naturally occurring hot water chimney or an artificially drilled well.
In FIG. 2, the code | symbol 11 is a submarine geothermal binary power generation apparatus which concerns on the present Example 2, 12 is the hot water which ejects from the hydrothermal vent of a submarine hydrothermal deposit (H), 13 is the said hot water 12 Is an open heat exchanger (evaporator) for boiling an internal secondary medium directly in contact with the pipe, 14 is a pipe for transporting the boiling secondary medium to a steam turbine, and 15 is a boiling secondary medium A steam turbine for obtaining a rotational force with a force of 16, a generator for converting the rotational force of the steam turbine 15 into electricity, and 17 for rectifying AC electricity obtained by the generator 16 into commercial power, A substation device that boosts the voltage to a transmission voltage, 18 is a cable for submarine power transmission, 19 is a pipe for transporting the secondary medium exhausted from the steam turbine 15 to a condenser, and 20 is an exhausted secondary The medium is condensed by exchanging heat with seawater Open-type heat exchanger (condenser), 21 is a pipe for transporting the condensed secondary medium, 22 is a pump for circulating the secondary medium, and 23 is a heat exchanger for the medium pressurized by the pump Piping 24 for transporting to the vessel (evaporator) is a case for a watertight submarine geothermal binary power generator that can be towed and installed from a marine vessel to the hydrothermal vent of the submarine hydrothermal deposit. is there.

In addition, the code | symbol 25 is a useful substance collection | recovery pipe for collect | recovering the hot water 12 which ejects from the seabed hydrothermal deposit (H) after heat recovery, and conveying to the offshore floating body which arrange | positioned the apparatus which collect | recovers useful metals. However, it is not necessarily essential for the submarine geothermal binary power generation apparatus 11 according to the second embodiment (details will be described in a third embodiment described later).

In the submarine geothermal binary power generation device 11 according to the second embodiment, the energy released from the ocean bottom hydrothermal system such as the ocean bottom hydrothermal deposit (H) is the total amount (44 terawatts) released from the entire earth surface. It is estimated that it reaches 1/4 (10 terawatts), and the hot water 12 is discharged as hot water from the hot water chimney and the like, and the hot water 12 is scattered from an outlet of the sea floor scattered over an area of about 100 m × 100 m. It is known that hot water 11 at 350 ° C. to 400 ° C. is ejected at a total amount of 100 kg / s (360 t / h) and a heat flux of about 250 MWth, and in this range about 75 MWe (75,000 kWe) Geothermal power generation becomes possible.

All the devices 13... 24 constituting the submarine geothermal binary power generation device 11 according to the second embodiment are assembled on land, transported by ship, and sunk in the target area.
In particular, as is apparent from FIG. 2, in the submarine geothermal binary power generation apparatus 11 according to the second embodiment, the exhaust steam of the evaporator 13 and the generator 16 that generate steam for rotating the steam turbine 15 is cooled. As the two heat exchangers composed of the condenser 20 for liquefying, open-type ones are used. That is, in these two heat exchangers (the evaporator 13 and the condenser 20), a heat exchange tube made of a material having high heat conductivity of a predetermined diameter and withstanding high water pressure is wound a plurality of times. The secondary medium flowing through the heat exchange tube and the surrounding material of the tube are arranged so as to protrude from both sides of the case 24 for the watertight submarine geothermal binary power generation device so that heat can be directly exchanged. Therefore, the condenser 13 disposed on the opposite side only by installing the evaporator 13 directly above the ejection hole from which the hot water 12 is ejected is disposed in cold seawater. Therefore, it is not necessary to route the condenser 20 to cold seawater, and heat exchange can be performed very easily as compared with facilities such as geothermal power generation on the ground.

In other words, in the submarine geothermal binary power generation device 11 according to the second embodiment, the evaporator 13 is installed on an ejection hole for ejecting hot water 12 from the seabed, and the condenser 20 is installed in the watertight seabed. Simply by positioning it on the opposite side of the geothermal binary power generator casing 24, it is possible to easily generate power with the generator 16 stored in the subsea geothermal binary power generator casing 24.

In addition, as the secondary medium flowing between the two heat exchangers composed of the evaporator 13 and the condenser 20, since these two heat exchangers are sealed to withstand high water pressure, The internal pressure of the cycle between these two heat exchangers need not be a serious problem under the sea floor, and the configuration as described above is necessary because the hot water side has a high temperature of about 400 ° C. As the secondary medium in the submarine geothermal binary power generation apparatus 11 according to the second embodiment, ammonia water or water can be used as the secondary medium. This is because it is considered that the use of ammonia water or water in a high-pressure body under the seabed is efficient in binary power generation, and alternative CFCs used in ordinary binary power generation in ground facilities are However, it is considered that the turbine design is rather difficult because it becomes supercritical, and the submarine geothermal binary power generation device 11 according to the second embodiment is rather preferable from the viewpoint of the secondary medium and the environment such as ozone destruction. It becomes.

In the submarine geothermal binary power generation apparatus 11 according to the second embodiment, the generated power is transmitted to the marine vessel (not shown) or platform (not shown) anchored on the ocean by the submarine cable 18, and the vessel (illustrated). From the outside) or platform (not shown), power is transmitted to the land or the surrounding offshore platform (for marine resource development or marine ranch) by a separate rotating power cable for transmission (not shown) or a microwave transmitter.

The two heat exchangers mentioned above occupy most of this kind of binary power generation equipment, and the generator 16 itself generated by the turbine 15 has a cylindrical shape with a total length of 5 m or less even with a capacity of several thousand kW. Therefore, the watertight shell itself of the casing 24 for the watertight submarine geothermal binary power generation device that stores it can be sufficiently small and can maintain a pressure resistance of about 1500 m.

The heat exchange tubes, generators, watertight hulls, submarine cables, etc. constituting the submarine geothermal binary power generation apparatus 11 according to the second embodiment are for use in hot water deposits (H) under high temperature / corrosive fluid. Use under high temperature, or use a corrosion-resistant material (for example, titanium alloy).
Since it is configured as described above, the submarine geothermal binary power generation device 11 according to the second embodiment can greatly reduce the labor of installation work on site compared to the geothermal power generation on land. Each of the devices 13 to 24 can be further modularized and assembled on land, so that it can be quickly installed like solar power generation or wind power generation.

Also, since the heat source is a natural hot water jet hole or a man-made drill hole or natural hole obtained by excavation within several hundreds of meters in the vicinity, the installation time per one is very fast. Therefore, for example, when the excavation of the artificial hole is finished, the power generation can be started without a long lead time exceeding 10 years like the geothermal power generation on land.

(Hot water-containing useful substance recovery device)
Next, in addition to or in addition to the submarine geothermal binary power generation according to the second embodiment, the submarine hot water according to the present invention is obtained from hot water from an excavated hot water mine or a naturally occurring hot water chimney. An outline of a “hot water-containing useful substance recovery device” according to Example 3, which is another example of a mode for carrying out power generation and hot water-containing useful substance recovery device, will be described with reference to the drawings.

It is known that hot water discharged from the seabed contains a large amount of heavy metal ions, etc. If useful substances such as silica and lithium can be recovered from useful metal ions contained in hot water in addition to heavy metals. Has the effect of two birds with one stone.
The hot water-containing useful substance recovery device according to the third embodiment guides hot water from an artificial drilling hot water hole or hot water chimney on the sea floor to a recovery device on a floating body installed on the ocean, and recovers resources such as useful metals. The hot water-containing useful substance recovery device according to the third embodiment includes a reaction tank, a hot water pump, a seawater pump, a chemical adjustment device, and a reverse osmosis device that are temperature-controlled by a heat exchanger. The apparatus has a configuration in which one or a plurality of constituent units having this configuration are superimposed.

FIG. 3 is a diagram illustrating a processing concept of the hot water-containing useful substance recovery device according to the third embodiment that recovers a useful substance from hot water such as hot water or hot water chimney used for submarine geothermal binary power generation, This is an example in which three basic constituent units are combined with a reaction tank, a hot water pump, a seawater pump, a chemical liquid adjusting device, and a reverse osmosis device that are temperature controlled by a heat exchanger.
Therefore, in order to avoid redundant description, only the set of units shown in FIG. 3 will be described, and the processing in the subsequent units will be repeated, and detailed description will be omitted.

In FIG. 3, the code | symbol 30 is a hot water containing useful substance collection | recovery apparatus which collect | recovers useful substances from the hot water extract | collected from the seabed which concerns on this Example 3, 31 is a reaction tank, 32 is the said heat exchanger, Reference numeral 33 denotes the hot water pump, to which the useful substance recovery pipe 25 according to the second embodiment is connected. Reference numeral 34 denotes the seawater pump, 35 denotes the chemical liquid adjusting device, 36 (36a, 36b) denotes the reverse osmosis device, 37 denotes the hot water, 38 denotes the seawater, and the device is installed. Can be collected offshore. Further, 39 is a useful substance (A), 40 is a useful substance (B), and 41 is a useful substance (final collection).

The hot water pump 33 is a pump that sends the hot water 37 to the reaction tank 31 that includes the heat exchanger 32, and the seawater pump 34 sends the seawater 38 to the heat exchanger 32, and The inside of the reaction tank 31 is set to an appropriate temperature (a temperature suitable for causing a reaction for recovering useful substances). Moreover, the said chemical | medical solution adjustment apparatus 35 is an apparatus which throws in the chemical | medical agent which adjusts the hot water 37 in the said reaction tank 31 to an appropriate property.

The process in the first unit in the hot water-containing useful substance recovery device 30 according to the third embodiment is performed by using the useful substance recovery pipe 25 shown in FIG. 2 illustrating the submarine geothermal binary power generation apparatus 11 according to the second embodiment. Is extended to the hot water discharge point, and the hot water 37 sucked by the hot water pump 33 through the recovery pipe 25 includes the heat exchanger 32, and the recovery temperature of the recovered material is controlled. It is fed into the reaction vessel 31.

Subsequently, the seawater pump 34 is driven to take in the seawater around the offshore floating body, the surrounding seawater is sent to the heat exchanger 32, and the hot water 37 in the reaction tank 31 contains the useful substance (A) 39 contained therein. Set the temperature so that it can be properly recovered. Here, “appropriately recovered temperature” means that the temperature is adjusted to a temperature at which the reaction is appropriately promoted based on the properties of the useful substance. It means that it is in a state suitable for a reaction such as promoting crystallization. In this example, the complex or the like that has been crystallized passes through the reverse osmosis device 36 in the next stage, whereby the complex of the useful substance (A) 39 is separated by a reverse osmosis membrane (not shown). The useful substance (A) 39 is recovered.

After the useful substance (A) 39 is recovered, the hot water-containing useful substance recovery device 30 according to the third embodiment is further sent to the next unit. That is, the hot water 37 after the processing in the first unit is completed and the useful substance (A) 39 is recovered is sent to the reaction tank 31 by the second hot water pump 33, and After the heat is exchanged by the second seawater pump 34 to an appropriate recovery temperature, a chemical for recovering the effective substance (B) 40 is further introduced from the second chemical liquid adjusting device 35 and useful. Properties suitable for the recovery of the substance (B) 40, for example, the complex of the useful substance (B) 40 passes through the second reverse osmosis device 36, so that the complex of the useful substance (B) 40 is reversed. It separates with a permeable membrane (not shown), and useful substance (B) 40 will be collect | recovered by subsequent required process.

Hereinafter, using the properties of the useful substance, the heat exchanger 32 is cooled down to the appropriate recovery temperature of the next useful substance after the solution remaining in the migrating separation, the same process is repeated, and the best recovered substance is repeated. After appropriate treatment, dump in the sea.
As described above, the hot water-containing useful substance recovery device 30 according to the third embodiment takes the process of setting the chemical solution for recovering the useful substance and the reaction temperature in a stepwise order from the higher one, and By making it repeatable, it is possible to efficiently recover the useful substances that are required.

Further, when the hot water-containing useful substance recovery device 30 according to the third embodiment is used for the submarine geothermal binary power generation device 11 according to the second embodiment described above, it is included in the hot water generated by the hydrothermal power generation, In this way, even if heavy metal ions or high-concentration salt compounds that are highly toxic and harmful to the entity are present, the risk of marine pollution due to the reduction and administration to the ocean can be avoided. Rather, avoiding the risk of marine pollution, recovering useful metals contained in hot water, improving business by generating by-products, and disposing detoxified hot water in the ocean, drilling reduction wells There is a merit that the cost related to maintenance can be reduced and the business performance can be improved.

The present invention is used for hydrothermal power generation using hot water ejected from the seabed of 1000 m to 1500 m and excavation / power generation / recovery that enables recovery of useful substances contained in the hot water.

DESCRIPTION OF SYMBOLS 1 Submarine hot water well drilling apparatus which concerns on Example 1 2 Drilling bit 3, 3a, 3b, ... Drilling pipe 4 Drilling water pump 5 Automatic raising / lowering top drive drilling apparatus 6 Unmanned control and power supply tower 7 Automatic drilling pipe connection Device 8 Self-propelled endless track vehicle 9 Seawater 10 Power transmission / communications cable 11 Submarine geothermal binary power generator 12 Hot water 13 Evaporator 14 Piping 15 Steam turbine 16 Generator 17 Substation 18 Submarine cable 19 Piping 20 Condenser 24 Submarine geothermal binary power generator housing 25 Useful material recovery pipe 30 Hot water-containing useful material recovery device 31 Reaction tank 32 Heat exchanger 33 Hot water pump 34 Seawater pump 35 Chemical solution adjustment device 36 Reverse osmosis equipment 37 Hot water 38 Seawater 39 Useful substances (A)
40 Useful substances (B)
41 Useful substances (final collection)
110 Framework 111 Fluid 112 Chimney 113 Tube 116 Ocean surface 117 Annular levitation device 118 Sea bottom 119 Heat differential strengthening tube 124 Platform 126 Return tube 132 Chilled water pump 133, 150, 151, 152 Ring 154 Leg 172 Conical 210 Hot water power unit 250 Fresh water 252 Mining facilities (resource recovery equipment)
H submarine hydrothermal deposit

Claims (5)

A high temperature drill bit for drilling holes in the submarine hydrothermal deposit;
A digging pipe that transmits rotational force to the bit and discharges debris (rock fragments) accumulated at the bottom of the hole with pumped digging water;
A pump for drilling water that feeds the seawater from the surrounding seawater to the digging pipe;
An automatic elevating top drive excavator that lifts and lowers the digging pipe and transmits the rotational force to the digging bit by grasping and rotating the uppermost part of the digging pipe during excavation;
A control / power supply tower that is equipped with a power supply that provides power and excavates pre-programmed points;
A plurality of pipes necessary for excavation are mounted on the upper and lower pipes having connecting screws on the upper and lower sides, and when the excavating pipe is being excavated to the excavation surface by the automatic elevating top drive excavator, A submarine hot-water well excavator characterized by being mounted on a self-propelled endless track vehicle that is self-propelled on the seabed by an endless track with an automatic digging pipe connection device capable of sequentially connecting the digging pipe to the upper part. . An open heat exchanger for directly contacting the hot water ejected from the hydrothermal vent of the submarine hydrothermal deposit and boiling the secondary medium inside;
Piping for transporting the boiled secondary medium to a steam turbine;
Piping for transporting the secondary medium exhausted from the steam turbine to a condenser;
An open-type heat exchanger for exchanging heat and condensing the secondary medium exhausted from the steam turbine with surrounding seawater;
A steam turbine for obtaining a rotational force by the force of the boiled secondary medium;
A generator for converting the rotational force of the steam turbine into electricity;
A submarine geothermal binary power generation characterized in that a substation device that rectifies AC electricity obtained by the generator into commercial power and boosts it to a transmission voltage is housed in a casing for a watertight submarine geothermal binary power generation device. apparatus. The open heat exchanger installed immediately above the hydrothermal vent of the submarine hydrothermal deposit and the open heat exchanger for exchanging heat by condensing the secondary medium with the surrounding seawater are condensed into the watertight seabed, respectively. The submarine geothermal binary power generation device according to claim 2, wherein the subsea geothermal binary power generation device is formed by being protruded from both side surfaces of the geothermal binary power generation device casing. A reactor that recovers useful metals and other resources from hot water holes or hot water chimneys on the seabed to a recovery device on a floating body installed on the ocean, and is temperature controlled by a heat exchanger A hot water-containing useful substance recovery apparatus, wherein one or a plurality of basic constituent units composed of a hot water pump, a seawater pump, a chemical solution adjusting device, and a reverse osmosis device are superposed. [Correction 30.04.2015 under Rule 91]
Using the hot water-containing useful substance recovery device according to claim 4, reversely osmosis of a useful substance for recovery by hot water from an artificial drilling hot water hole or hot water chimney on the seabed is collected by seawater. Adjust the treatment temperature to react with the characteristic properties that can be separated by the membrane, and then adjust the chemicals with the chemicals that can react with the characteristic properties that can be separated by the reverse osmosis membrane. Thereafter, the step of recovering the target useful substance is superposed once or a plurality of times, and the hot water-containing useful substance recovery processing method is characterized.

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