CN113754120B - Method for enhancing scale precipitation by negative pressure on thermal spring well - Google Patents
Method for enhancing scale precipitation by negative pressure on thermal spring well Download PDFInfo
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- CN113754120B CN113754120B CN202111073838.XA CN202111073838A CN113754120B CN 113754120 B CN113754120 B CN 113754120B CN 202111073838 A CN202111073838 A CN 202111073838A CN 113754120 B CN113754120 B CN 113754120B
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/58—Treatment of water, waste water, or sewage by removing specified dissolved compounds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/06—Contaminated groundwater or leachate
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
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Abstract
The invention provides a method for separating scale from a thermal spring well by negative pressure enhancement, which comprises the following steps: s1, starting a variable-frequency deep well pump to convey hot spring water to the upper part of a vacuum container, and cooling the hot spring water at the upper part of the vacuum container to 0-80 ℃ by a heat efficiency device through a water-water heat exchange mode and then entering the vacuum container; s2, when the water quantity in the vacuum container is 1/3-2/3, opening a vacuum pump to vacuum, removing water vapor through a steam-water separator, controlling the vacuum degree in the vacuum container to be 30-100 kPa and keeping for 5-60 minutes, and promoting the thermal spring water in the vacuum container to separate out calcium carbonate scale under the combined action of the vaporization temperature and negative pressure of the corresponding vacuum degree when the temperature change is lower than the corresponding vacuum degree; s3, starting an air pressure balancer to balance the air pressure in the vacuum container with the external atmospheric pressure, and sending the cleaned scale in the vacuum container to a scale residue filtering and recycling device along with water flow through a booster pump to recycle the scale, wherein filtered hot spring water is directly sent to a hot spring water pool. The method can quickly complete the enhanced scale precipitation by vacuumizing and adjusting the temperature of the hot spring raw water.
Description
Technical Field
The invention relates to the technical field of geothermal resource development and application, in particular to a method for enhancing scale precipitation by negative pressure on a thermal spring well.
Background
Various salts such as carbonate, bicarbonate, sulfate, silicate, phosphate and chloride are dissolved in the hot spring water, the solubility of monovalent metal salts is high, and the monovalent metal salts are generally difficult to crystallize out of the hot spring water, but the solubility of divalent metal salts (except for chloride) is small, and the solubility is a negative temperature coefficient, so that insoluble crystals are easy to form along with the increase of concentration and temperature and are precipitated out of the hot spring water, and the crystals are adhered to the heat transfer surface of a pipeline to form scale. The poorly soluble calcium carbonate may be amorphous calcium carbonate, hexahydrate calcium carbonate, monohydrate calcium carbonate, hexagonal calcium carbonate, aragonite and calcite. Calcite is the thermodynamically most stable calcium carbonate form, and is also the final product of the transformation of various calcium carbonate forms in water.
The scale formation of the hot spring water can cause the blockage of equipment of a hot spring well and a hot spring pipe network system, so that the project maintenance is difficult, the project is stopped, and the phenomenon is more prominent in the current hot spring project. At present, the scale inhibition technology applied in the hot spring industry generally realizes scale inhibition by putting a scale inhibitor into an original heat medium box arranged at the rear end of a geothermal well. The inventor of the application finds that most of the scale inhibitor is a weak acid material, the medium applied with the scale inhibitor can have adverse effects on the conveying channel such as corrosion with uncertain degree, and the like, and meanwhile, the secondary treatment on the weak acid medium is also an essential important measure, otherwise, the phosphorus-containing scale inhibitor can cause pressure on environmental protection, so that the secondary discharge risk affecting the environment is formed.
Disclosure of Invention
Aiming at the technical problems that the scale inhibition in the process from geothermal water to terminal application is generally realized by putting a scale inhibitor into an original thermal medium box arranged at the rear end of a geothermal well, the scale inhibitor medium has secondary adverse effects on corrosion and the like with uncertain degrees on a conveying channel, and meanwhile, the weak acid medium is required to be subjected to secondary treatment, otherwise, the environment is influenced, the invention provides a negative pressure enhanced scale precipitation method on a thermal spring well.
In order to solve the technical problems, the invention adopts the following technical scheme:
the method comprises the steps that a negative pressure enhanced scale precipitation device on a thermal spring well is adopted, the negative pressure enhanced scale precipitation device on the Wen Quanjing comprises a variable-frequency deep well pump, a vacuum container, a heat effect device, a steam-water separator, a vacuum pump, an air pressure balancer and a scale slag filtering and recycling device, the variable-frequency deep well pump is arranged in Wen Quanjing, the variable-frequency deep well pump is connected with a vacuum container outside the well through a pipeline, the heat effect device is arranged in the vacuum container, a low-temperature water inlet and a high-temperature water outlet of the heat effect device penetrate through the vacuum container, the input end of the steam-water separator is connected with the top of the vacuum container through a pipeline, the output end of the steam-water separator is connected with the vacuum pump, the air pressure balancer is connected with the top of the vacuum container through a pipeline, the scale slag filtering and recycling device is connected with the lower part of the vacuum container through a pipeline, and a booster pump is connected on the pipeline between the scale slag filtering and recycling device and the vacuum container;
the method comprises the following steps:
s1, starting the variable-frequency deep well pump to convey hot spring water to the upper part of a vacuum container, adding low-temperature water from a low-temperature water inlet of the thermal effect device, and cooling the hot spring water at the upper part of the vacuum container to 0-80 ℃ by the thermal effect device in a water-water heat exchange mode and then entering the vacuum container;
s2, when the water quantity in the vacuum container is 1/3-2/3, opening a vacuum pump to vacuum, removing water vapor through a steam-water separator, controlling the vacuum degree in the vacuum container to be 30-100 kPa and keeping for 5-60 minutes, and promoting the thermal spring water in the vacuum container to separate out calcium carbonate scale under the combined action of the vaporization temperature and negative pressure of the corresponding vacuum degree when the temperature change is lower than the corresponding vacuum degree;
s3, starting the air pressure balancer to enable the interior of the vacuum container to be communicated with the outside air, after the air pressure in the interior of the vacuum container is balanced with the outside air pressure, conveying the suspended dirt and the attached dirt cleaned in the vacuum container to a dirt residue filtering and recycling device along with water flow to recycle the dirt, and directly conveying filtered hot spring water to a hot spring water pool.
Compared with the prior art, the method for reinforcing scale precipitation on the hot spring well under negative pressure provided by the invention firstly reduces the temperature of hot spring water sent to the upper part of the vacuum container to 0-80 ℃ through the thermal effect device, then enters the vacuum container, secondly, when the quantity of hot spring water in the vacuum container is 1/3-2/3, the hot spring water is vacuumized through the vacuum pump, the vacuum degree is controlled to be 30-100 kPa, so that the hot spring water heating medium rapidly completes reinforced scale precipitation under negative pressure and 0-80 ℃ regulation temperature, after calcium carbonate scale is precipitated for 5-60 minutes, the air pressure balancer is started to enable the interior of the vacuum container to be communicated with the outside atmosphere, thus the vacuum state in the vacuum container is destroyed, and after the air pressure in the vacuum container is balanced with the outside atmospheric pressure, the water and the scale in the vacuum container are sent to the scale residue filtering and recycling device through the booster pump for filtering and recycling. According to the method, on one hand, the vacuum pump is used for vacuumizing, so that the negative pressure operation of the vacuum container is realized, and the escape of carbon dioxide in the vacuum container is promoted, so that the crystallization and precipitation of calcium carbonate scale substances generated by combining calcium ions, carbonate ions and bicarbonate ions in the hot spring water are greatly improved; on the other hand, the temperature of the hot spring raw water is regulated through the thermal effect device, so that the vaporization of the hot spring water medium is reduced, the negative pressure environment is destroyed, the precipitation of calcium carbonate scale is promoted rapidly, and meanwhile, the heat loss caused by vaporization is prevented. Therefore, the geothermal medium can be reinforced to quickly finish scaling through the application in the two aspects, material elements forming scale matters in the geothermal medium can be effectively eliminated or reduced, scale inhibition can be realized by adding the scale inhibitor relative to the prior art, and the geothermal medium has the advantages of no secondary adverse effect such as corrosion and the like on a conveying channel, pressure on the environment, high efficiency and environmental protection.
Further, a vacuum pressure gauge for displaying the internal pressure of the container and a thermometer for displaying the internal water temperature of the container are arranged at the top of the vacuum container.
Further, the scale residue filtering and recycling device adopts a membrane filter with the temperature resistance of 40-100 ℃ and the filtering precision of 0.1-10 mu m.
Further, a first manual valve is connected to the pipeline at the low-temperature water inlet, a second manual valve is connected to the pipeline at the high-temperature water outlet, a third manual valve is connected to the pipeline between the air pressure balancer and the vacuum container, and a fourth manual valve is connected to the pipeline between the booster pump and the vacuum container.
Further, the flow rate of the booster pump is 1-5 m 3 And/h, the lift is 10-30 m.
Further, the heat efficiency device in the step S1 reduces the temperature of hot spring water at the upper part of the vacuum container to 40-80 ℃ through a water-water heat exchange mode, then the hot spring water enters the vacuum container, and the vacuum degree in the vacuum container in the step S2 is controlled to be 30-80 kPa and kept for 10-40 minutes.
Further, in the step S2, the vacuum degree in the vacuum container is controlled to be 50-80 kPa and kept for 30 minutes, and the concentration of calcium, magnesium and bicarbonate ions in water is detected to be 2.05mg/l, 3.41mg/l and 423.80mg/l respectively by an ion concentration measuring instrument arranged on a bypass channel at the bottom of the vacuum container.
Drawings
FIG. 1 is a schematic diagram of a scale separating device for negative pressure enhancement on a thermal spring well.
In the figure, 1, a variable-frequency deep well pump; 2. a vacuum container; 21. a vacuum pressure gauge; 22. a thermometer; 23. a bypass passage; 3. a thermal efficiency device; 31. a low temperature water inlet; 32. a high-temperature water outlet; 4. a steam-water separator; 5. a vacuum pump; 6. an air pressure balancer; 7. a scale residue filtering and recycling device; 8. a booster pump; 9. a first manual valve; 10. a second manual valve; 11. a third manual valve; 12. and a fourth manual valve.
Detailed Description
The invention is further described with reference to the following detailed drawings in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the implementation of the invention easy to understand.
In the description of the present invention, it should be understood that the terms "longitudinal," "radial," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships that are based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present invention and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Referring to fig. 1, the invention provides a method for separating scale on a thermal spring well by negative pressure enhancement, in which a device for separating scale on a thermal spring well by negative pressure enhancement is adopted, the device for separating scale on a thermal spring well by negative pressure enhancement on Wen Quanjing comprises a variable-frequency deep-well pump 1, a vacuum container 2, a heat-effect device 3, a vapor-water separator 4, a vacuum pump 5, an air pressure balancer 6 and a scale residue filtering and recycling device 7, wherein the variable-frequency deep-well pump 1 is arranged in Wen Quanjing, the variable-frequency deep-well pump 1 is connected with a vacuum container 2 outside the well through a pipeline, the heat-effect device 3 is arranged in the vacuum container 2, a low-temperature water inlet 31 and a high-temperature water outlet 32 of the heat-effect device 3 penetrate from the vacuum container 2, the heat-effect device 3 can be realized by adopting the existing PE-RT heat exchange tubes, the surface of the heat exchange tubes is smooth and difficult to scale, the scale is easy to clean, the input end of the vapor-water separator 4 is connected with the top of the vacuum container 2 through a pipeline, the output end of the vapor-water separator 4 is connected with the vacuum pump 5, the output end of the vapor-water separator 4 is connected with the vacuum pump 6 through the pipeline and the top of the air pressure balancer 2, and the filter device 7 is connected with the top of the vacuum container 2 through the filter device through the upper filter part and the vacuum container 8;
the method comprises the following steps:
s1, starting the variable-frequency deep-well pump 1 to convey hot spring water to the upper part of a vacuum container 2, adding low-temperature water from a low-temperature water inlet 31 of a thermal effect device 3, cooling the hot spring water at the upper part of the vacuum container to 0-80 ℃ by a water-water heat exchange mode by the thermal effect device 3, and then entering the vacuum container 2, wherein the added low-temperature water is high-temperature water flowing out from a high-temperature water outlet 32 after heat exchange, so that the high-temperature water can be used for domestic hot water, geothermal heat and the like, and the heat exchange efficiency can reach more than 98%;
s2, when the water quantity in the vacuum container 2 is 1/3-2/3, opening a vacuum pump 5 to vacuumize, removing water vapor through a steam-water separator 4, controlling the vacuum degree in the vacuum container 2 to be 30-100 kPa and keeping for 5-60 minutes, and promoting the thermal spring water in the vacuum container 2 to separate out calcium carbonate scale under the combined action of vaporization temperature and negative pressure of the corresponding vacuum degree when the temperature change is lower than the corresponding vacuum degree; specifically, according to the existing equilibrium equation of the combination reaction of calcium ions, carbonate ions and bicarbonate ions in water, the following equilibrium equation is adopted
It is known that for a vapor-liquid two-phase system, if the total pressure drop of the chemical equilibrium reaction equation (1) is low, the reaction is favored in the direction of generating the vapor phase material, and the carbon dioxide (CO 2 ) The method is the only gas-phase product, so that the reduction of the partial pressure of the gas-phase carbon dioxide in the system (namely, the total pressure drop is low) is beneficial to the escape of the carbon dioxide from water (namely, the gas-phase product is generated), namely, the chemical equilibrium reaction equation (1) moves rightwards to promote the crystallization and precipitation of the scale calcium carbonate, and the method utilizes the precipitation principle of the calcium carbonate salt to realize the negative pressure enhanced scale precipitation;
s3, starting the air pressure balancer 6 to enable the interior of the vacuum container 2 to be communicated with the outside air, after the air pressure in the vacuum container 2 is balanced with the outside air pressure, conveying the suspended dirt and the attached dirt cleaned in the vacuum container 2 to the dirt and slag filtering and recycling device 7 along with water flow through the booster pump 8 to recycle the dirt, wherein the specific dirt enters the dirt pond in the device to be recycled after being backwashed by the treated water, can be sold as a carbonate product after being purified, and the filtered hot spring water is directly conveyed to the hot spring pond.
Compared with the prior art, the method for reinforcing scale precipitation on the hot spring well under negative pressure provided by the invention firstly reduces the temperature of hot spring water sent to the upper part of the vacuum container to 0-80 ℃ through the thermal effect device, then enters the vacuum container, secondly, when the quantity of hot spring water in the vacuum container is 1/3-2/3, the hot spring water is vacuumized through the vacuum pump, the vacuum degree is controlled to be 30-100 kPa, so that the hot spring water heating medium rapidly completes reinforced scale precipitation under negative pressure and 0-80 ℃ regulation temperature, after calcium carbonate scale is precipitated for 5-60 minutes, the air pressure balancer is started to enable the interior of the vacuum container to be communicated with the outside atmosphere, thus the vacuum state in the vacuum container is destroyed, and after the air pressure in the vacuum container is balanced with the outside atmospheric pressure, the water and the scale in the vacuum container are sent to the scale residue filtering and recycling device through the booster pump for filtering and recycling. According to the method, on one hand, the vacuum pump is used for vacuumizing, so that the negative pressure operation of the vacuum container is realized, and the escape of carbon dioxide in the vacuum container is promoted, so that the crystallization and precipitation of calcium carbonate scale substances generated by combining calcium ions, carbonate ions and bicarbonate ions in the hot spring water are greatly improved; on the other hand, the temperature of the hot spring raw water is regulated through the thermal effect device, so that the vaporization of the hot spring water medium is reduced, the negative pressure environment is destroyed, the precipitation of calcium carbonate scale is promoted rapidly, and meanwhile, the heat loss caused by vaporization is prevented. Therefore, the geothermal medium can be reinforced to quickly finish scaling through the application in the two aspects, material elements forming scale matters in the geothermal medium can be effectively eliminated or reduced, scale inhibition can be realized by adding the scale inhibitor relative to the prior art, and the geothermal medium has the advantages of no secondary adverse effect such as corrosion and the like on a conveying channel, pressure on the environment, high efficiency and environmental protection.
As a specific embodiment, referring to fig. 1, the top of the vacuum container 2 is provided with a vacuum pressure gauge 21 for displaying the internal pressure of the container, and a thermometer 22 for displaying the internal water temperature of the container, so that the vacuum pressure gauge 21 and the thermometer 22 can rapidly read and observe the pressure and temperature parameters, which is convenient and practical.
As a specific example, the scale and residue filtering and recovering device 7 is realized by selecting the existing membrane filter (MO filter) with the temperature resistance of 40-100 ℃ and the filtering precision of 0.1-10 μm, thereby realizing the comprehensive collection of calcium carbonate scale after crystallization and precipitation.
As a specific embodiment, referring to fig. 1, a first manual valve 9 is connected to a pipeline at the low temperature water inlet 31, a second manual valve 10 is connected to a pipeline at the high temperature water outlet 32, a third manual valve 11 is connected to a pipeline between the air pressure balancer 6 and the vacuum container 2, and a fourth manual valve 12 is connected to a pipeline between the booster pump 8 and the vacuum container 2. Wherein, the first manual valve 9 and the second manual valve 10 are suitable for being opened when external low-temperature water is used for heat exchange, so that the water temperature in the vacuum container is controlled to be 0-80 ℃ by the heat efficiency device 3; the third manual valve 11 is adapted to be opened when the vacuum vessel 2 is opened to the outside atmosphere by the air pressure balancer 6; the fourth manual valve 12 is adapted to open when water and scale are sent to the scale residue filtering and recovering device 7 for filtering and collecting by the booster pump 8. In the embodiment, by arranging the first to fourth manual valves, when the respective devices are convenient to work, if the four manual valves are closed together, good partition protection can be formed for the vacuum degree and the temperature in the vacuum container 2, so that the vacuum container 2 can keep independent operation when the vacuum enhanced scale precipitation and scaling are carried out, and the damage to the vacuum degree and the temperature is avoided.
As a specific example, the flow rate of the booster pump 8 is 1-5 m 3 And/h, the lift is 10-30 m, so that the medium in the pipeline can pass through the filtering equipment at a certain flow rate and pressure, and the filtering precision and the filtering quantity can be improved.
As a specific embodiment, the heat-efficiency device 3 in the step S1 cools the hot spring water at the upper part of the vacuum container to 40-80 ℃ through a water-water heat exchange mode, then the hot spring water enters the vacuum container 2, and the vacuum degree in the vacuum container 2 in the step S2 is controlled to be 30-80 kPa and maintained for 10-40 minutes, so that better negative pressure and temperature conditions can be provided for enhanced scale precipitation, and the geothermal medium can conveniently and rapidly complete the enhanced scale precipitation.
As a preferred embodiment, the vacuum degree in the vacuum vessel 2 in the step S2 is controlled to be 50-80 kPa for 30 minutes, and the concentration of calcium, magnesium and bicarbonate ions in the water is detected to be 2.05mg/l, 3.41mg/l and 423.80mg/l by the existing ion concentration measuring instrument (not shown) arranged on the bypass channel 23 at the bottom of the vacuum vessel 2. The following examples are experimental data for measuring the concentration of calcium, magnesium and bicarbonate in effluent from the bottom of the vacuum vessel 2 through the bypass channel 23 at different vacuum levels and at different holding times.
From the above experimental data, the higher the vacuum degree (the smaller the pressure) and the longer the holding time, the lower the concentration of calcium, magnesium and bicarbonate ions in the effluent water, i.e. the higher the scale precipitation degree of the crystals.
Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the technical solution of the present invention, which is intended to be covered by the scope of the claims of the present invention.
Claims (5)
1. The method is characterized in that a negative pressure enhanced scale precipitation device on a thermal spring well is adopted, the negative pressure enhanced scale precipitation device on the Wen Quanjing comprises a variable-frequency deep well pump, a vacuum container, a heat effect device, a steam-water separator, a vacuum pump, an air pressure balancer and a scale slag filtering and recycling device, the variable-frequency deep well pump is arranged in Wen Quanjing, the variable-frequency deep well pump is connected with a vacuum container outside the well through a pipeline, the heat effect device is arranged in the vacuum container, a low-temperature water inlet and a high-temperature water outlet of the heat effect device penetrate through the vacuum container, the input end of the steam-water separator is connected with the top of the vacuum container through a pipeline, the output end of the steam-water separator is connected with the vacuum pump, the air pressure balancer is connected with the top of the vacuum container through a pipeline, the top of the vacuum container is provided with a vacuum pressure gauge for displaying the internal pressure of the container, the scale slag filtering and recycling device is connected with the lower part of the vacuum container through a pipeline, and a booster pump for displaying the internal water temperature of the container is connected with the pipeline between the scale slag filtering and the vacuum container;
the method comprises the following steps:
s1, starting the variable-frequency deep well pump to convey hot spring water to the upper part of a vacuum container, adding low-temperature water from a low-temperature water inlet of the thermal effect device, and cooling the hot spring water at the upper part of the vacuum container to 40-80 ℃ by the thermal effect device in a water-water heat exchange mode and then entering the vacuum container;
s2, opening a vacuum pump to vacuumize when the water quantity in the vacuum container is 1/3-2/3, removing water vapor through a steam-water separator, controlling the vacuum degree in the vacuum container to be 30-80 kPa and keeping for 10-40 minutes, and promoting the thermal spring water in the vacuum container to separate out calcium carbonate scale under the combined action of vaporization temperature and negative pressure of the corresponding vacuum degree when the temperature change is lower than the corresponding vacuum degree;
s3, starting the air pressure balancer to enable the interior of the vacuum container to be communicated with the outside air, after the air pressure in the interior of the vacuum container is balanced with the outside air pressure, conveying the suspended dirt and the attached dirt cleaned in the vacuum container to a dirt residue filtering and recycling device along with water flow to recycle the dirt, and directly conveying filtered hot spring water to a hot spring water pool.
2. The method for separating out scale in a negative pressure enhanced manner on a thermal spring well according to claim 1, wherein the scale residue filtering and recycling device is a membrane filter with a temperature resistance of 40-100 ℃ and a filtering precision of 0.1-10 μm.
3. The method for scale precipitation enhancement by negative pressure on a thermal spring well according to claim 1, wherein a first manual valve is connected to a pipeline at the low-temperature water inlet, a second manual valve is connected to a pipeline at the high-temperature water outlet, a third manual valve is connected to a pipeline between the air pressure balancer and the vacuum container, and a fourth manual valve is connected to a pipeline between the booster pump and the vacuum container.
4. The method for scale precipitation enhancement by negative pressure on a thermal spring well according to claim 1, wherein the flow rate of the booster pump is 1-5 m 3 And/h, the lift is 10-30 m.
5. The method for scale separation by negative pressure enhancement in a thermal spring well according to claim 1, wherein in the step S2, the vacuum degree in the vacuum container is controlled to be 50-80 kpa and maintained for 30 minutes, and the concentration of calcium, magnesium and bicarbonate ions in water is detected to be 2.05mg/l, 3.41mg/l and 423.80mg/l respectively by an ion concentration measuring instrument arranged on a bypass channel at the bottom of the vacuum container.
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| US3444054A (en) * | 1966-11-23 | 1969-05-13 | Grace W R & Co | Evaporator saline feed water treatment for scale control |
| JPH0647110B2 (en) * | 1985-09-27 | 1994-06-22 | 株式会社日阪製作所 | How to use heat from hot spring water |
| JPH09195715A (en) * | 1996-01-19 | 1997-07-29 | Toshiba Eng Co Ltd | Steam sampling facility |
| JP2009039667A (en) * | 2007-08-09 | 2009-02-26 | World License:Kk | Scale preventing method of hot spring aqueous system |
| JP5218895B2 (en) * | 2008-05-23 | 2013-06-26 | 独立行政法人産業技術総合研究所 | Method and apparatus for transporting hot spring water or geothermal water that does not cause carbonate scale failure |
| JP5550130B2 (en) * | 2009-07-21 | 2014-07-16 | 東京電力株式会社 | Hot water supply method and hot water supply system |
| WO2015052840A1 (en) * | 2013-10-11 | 2015-04-16 | 三菱電機株式会社 | Water treatment device and hot-water supply device |
| US20170096355A1 (en) * | 2015-10-06 | 2017-04-06 | King Abdulaziz City for Science and Technology (KACST) | Process and system for well water treatment |
| ITUB20155317A1 (en) * | 2015-10-26 | 2017-04-26 | Exergy Spa | ORC binary cycle geothermal plant and process |
| JP6847474B2 (en) * | 2017-03-08 | 2021-03-24 | 株式会社Ｆ・Ｅ・Ｃ | Evaporation solid-liquid separation method |
| CN108751302A (en) * | 2018-07-20 | 2018-11-06 | 昆山元魁机电工程有限公司 | A kind of vacuum and low temperature evaporating separation device and sewage water treatment method |
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