CN113620478A - Weak-alkalization pressure-reducing reinforced scale separation method - Google Patents
Weak-alkalization pressure-reducing reinforced scale separation method Download PDFInfo
- Publication number
- CN113620478A CN113620478A CN202111074806.1A CN202111074806A CN113620478A CN 113620478 A CN113620478 A CN 113620478A CN 202111074806 A CN202111074806 A CN 202111074806A CN 113620478 A CN113620478 A CN 113620478A
- Authority
- CN
- China
- Prior art keywords
- pressure
- heat
- preservation
- equipment
- water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24T—GEOTHERMAL COLLECTORS; GEOTHERMAL SYSTEMS
- F24T10/00—Geothermal collectors
- F24T10/20—Geothermal collectors using underground water as working fluid; using working fluid injected directly into the ground, e.g. using injection wells and recovery wells
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Organic Chemistry (AREA)
- Water Supply & Treatment (AREA)
- Environmental & Geological Engineering (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention provides a weak-alkalization pressure-reduction reinforced scale separation method, which comprises the following steps: s1, starting a deep well pump to convey hot spring water into heat-preservation and pressure-reduction equipment under the pressure of 0.1-1.0 MPa, and stopping water inflow when the water amount in the heat-preservation and pressure-reduction equipment exceeds 2/3; s2, adjusting the pressure in the heat-preservation and pressure-reduction equipment to 0.1-0.2 MPa, releasing the pressure of the hot spring water in the equipment to a normal pressure state, keeping the temperature change in the equipment within 2 ℃, adjusting the pH value of the hot spring water in the heat-preservation and pressure-reduction equipment to 7.5-9.0 through a pH adjusting device, standing for 30-120 minutes, and accelerating the precipitation of calcium carbonate crystal scaling substances from the hot spring water in the equipment under the conditions of pressure reduction and weak alkali environment; and S3, starting a booster pump, conveying the cleaned dirt in the heat-preservation and pressure-reduction equipment to a dirt filtering and recycling device along with the water flow to filter and crystallize the dirt, directly conveying the filtered hot spring water to a hot spring water pool, and backwashing the dirt in the dirt filtering and recycling device by using the filtered water to realize recycling. The method can quickly finish the scaling precipitation of the calcium carbonate salt by reducing the pressure and in a weak alkali environment.
Description
Technical Field
The invention relates to the technical field of geothermal resource development and utilization, in particular to a weak-alkalization pressure-reduction reinforced scale separation method.
Background
Various salts such as carbonate, bicarbonate, sulfate, silicate, phosphate, chloride and the like are dissolved in the hot spring water, the solubility of monovalent metal salts of the salts is high, and the salts are generally difficult to crystallize and precipitate from the hot spring water, but the solubility of divalent metal salts (except chloride) of the salts is low, the salts have negative temperature coefficients, and the salts are easy to form insoluble crystals to precipitate from the hot spring water along with the increase of concentration and temperature and are adhered to the heat transfer surface of a pipeline to form scale. The insoluble calcium carbonate can be amorphous calcium carbonate, calcium carbonate hexahydrate, calcium carbonate monohydrate, hexagonal calcium carbonate, aragonite and calcite. Calcite belongs to a trigonal system, is the most thermodynamically stable calcium carbonate crystal form, and is a final-state product converted by various calcium carbonate crystal forms in water.
Hot spring water scaling can cause equipment blockage of hot spring wells and hot spring pipe network systems, so that the project is difficult to maintain and stops running, 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 adding a scale inhibitor into an original heat medium box arranged at the rear end of a geothermal well. The inventor of the application discovers that most of the scale inhibitor is weakly acidic materials, the medium applying the scale inhibitor can have secondary adverse effects such as corrosion with uncertain degree on a conveying channel, meanwhile, secondary treatment on the weakly acidic medium is also a necessary important measure, otherwise, the phosphorus-containing scale inhibitor can cause pressure on environmental protection, and secondary emission risks influencing the environment are formed.
Disclosure of Invention
The invention provides a weak-alkalization pressure-reduction enhanced scale separation method, aiming at the technical problems that scale inhibition is generally realized in a raw heat medium box arranged at the rear end of a geothermal well in the prior art in the process of applying geothermal effluent to a terminal, scale inhibitors are added, the scale inhibitors can generate secondary adverse effects such as corrosion with uncertain degree on a conveying channel, weak-alkalinity media must be subjected to secondary treatment, and the environment is influenced.
In order to solve the technical problems, the invention adopts the following technical scheme:
a weak-alkalization pressure-reducing intensified scale separation method adopts a weak-alkalization pressure-reducing intensified scale separation device, wherein the weak-alkalization pressure-reducing intensified scale separation device comprises a deep-well pump, heat-preservation and pressure-reduction equipment, a pH adjusting device, a booster pump and a scale residue filtering and recovering device, the deep-well pump is arranged in a thermal spring well, the deep-well pump is connected with the heat-preservation and pressure-reduction equipment outside the well through a pipeline, the pH adjusting device comprises a pH adjusting box and a dosing pump, the pH adjusting box is connected with the heat-preservation and pressure-reduction equipment through a dosing pump, an inlet of the booster pump is connected with the lower part of the heat-preservation and pressure-reduction equipment through a pipeline, and an outlet of the booster pump is connected with the scale residue filtering and recovering device through a pipeline;
the method comprises the following steps:
s1, starting the deep well pump to convey hot spring water into heat-preservation and pressure-reduction equipment under the pressure of 0.1-1.0 MPa, and stopping water inflow when the water amount in the heat-preservation and pressure-reduction equipment exceeds 2/3;
s2, adjusting the pressure in the heat-preservation and pressure-reduction equipment to 0.1-0.2 MPa, releasing the pressure of hot spring water conveyed into the heat-preservation and pressure-reduction equipment to a normal pressure state, keeping the temperature change in the heat-preservation and pressure-reduction equipment within 2 ℃, meanwhile, feeding alkali liquor in a pH adjusting box into the heat-preservation and pressure-reduction equipment through a medicine feeding pump, adjusting the pH of the hot spring water in the heat-preservation and pressure-reduction equipment to 7.5-9.0, standing for 30-120 minutes, and accelerating the precipitation of calcium carbonate crystal scaling substances from the hot spring water in the heat-preservation and pressure-reduction equipment under the conditions of pressure reduction and weak base;
s3, starting the booster pump, conveying the cleaned suspended dirt and attached dirt in the heat-insulation and pressure-reduction equipment to a dirt and slag filtering and recycling device along with water flow to filter the crystallized dirt, directly conveying the filtered hot spring water to a hot spring water pool, closing the booster pump when the water yield of the dirt and slag filtering and recycling device is reduced by more than 20%, and backwashing the dirt in the dirt and slag filtering and recycling device by using the filtered water.
Compared with the prior art, the weak-alkalization decompression strengthening scale precipitation method provided by the invention comprises the following steps of firstly, enabling hot spring water to be under the pressure of 0.1-1.0 MPaThe method comprises the steps of conveying the hot spring water into heat-preservation and pressure-reduction equipment, adjusting pressure in the heat-preservation and pressure-reduction equipment to enable the hot spring water to release pressure to a normal pressure state, controlling temperature change in the heat-preservation and pressure-reduction equipment within 2 ℃, adjusting pH in the heat-preservation and pressure-reduction equipment to 7.5-9.0 through a pH adjusting device, standing for 30-120 minutes to enable a hot spring water heating medium to accelerate calcium carbonate crystal precipitation in a pressure-reduction and weak-alkali environment, starting a booster pump after precipitation of scale substances, conveying water and the scale substances in the heat-preservation and pressure-reduction equipment to a scale residue filtering and recovering device through the scale residue filtering and recovering device for filtering and recovering, and directly conveying the filtered hot spring water to a hot spring pool. On one hand, the application promotes the escape of carbon dioxide in the heat-preservation and pressure-reduction equipment through rapid pressure reduction, and greatly improves calcium ions and Carbonate (CO) in hot spring water3 2-) Ions and bicarbonate radical (HCO)3 -) The ions are combined to generate calcium carbonate crystal and are separated out; on the other hand, the pH value of the hot spring raw water in the heat-preservation and pressure-reduction equipment is adjusted to increase the concentration ratio of carbonate ions and bicarbonate ions in the raw water, so that the formation of calcium carbonate salt is promoted, and the calcium carbonate salt is crystallized and separated out. Therefore, the scale formation of the geothermal medium is rapidly completed through the two aspects, the substance elements forming the scales in the geothermal medium are effectively eliminated or reduced, and compared with the existing scale inhibition realized by adding the scale inhibitor, the scale inhibition method has the advantages that any secondary adverse effect such as corrosion and the like on the conveying channel and the pressure on the environment are not generated, the precipitation of the scales in the heat medium conveying channel is reduced or eliminated, the service life of a rear-end facility is prolonged, the maintenance interval period of the facility is prolonged, and the operation cost is reduced.
Furthermore, a pressure gauge for displaying the internal pressure of the equipment and a thermometer for displaying the internal water temperature of the equipment are arranged on the heat-preservation and pressure-reduction equipment.
Further, the dirt and slag filtering and recycling device is resistant to temperature of 0-100 ℃, the filtering precision is 1-5 mu m, and the backwashing strength is 10-15L/m2S membrane filter.
Furthermore, a pipeline between the deep well pump and the heat-preservation and pressure-reduction equipment is connected with a pipeline which can adjust the pressure in the pipeline to 0.1-1.0 MPa and the flow to 5m3First manual valve of/h.
Furthermore, a second manual valve is connected on a pipeline between the booster pump and the heat-preservation depressurization equipment, and a third manual valve is connected on a scale substance recovery pipeline of the scale and slag filtration and recovery device.
Further, in the step S2, the pressure in the heat-preservation and pressure-reduction equipment is adjusted to 0.1-0.2 MPa, the pH is adjusted to 7.5-8.5, and the mixture is kept still for 50-100 minutes.
Further, in the step S2, the pressure in the thermal insulation and pressure reduction device is adjusted to 0.1MPa, the pH is adjusted to 8.5, and the concentrations of calcium, magnesium, and bicarbonate ions in the water are detected to be 17.76mg/l, 5.10mg/l, and 661.08mg/l, respectively, by an ion concentration measuring instrument provided in the pipe of the scale residue filtering and recovering device that sends the water to the hot spring pool.
Drawings
FIG. 1 is a schematic structural diagram of a weakly alkalizing pressure-reducing scale-separating-enhancing device provided by the invention.
FIG. 2 is a diagram showing the relationship between the ratio of carbonate concentration and pH in a conventional equilibrium solution.
In the figure, 1, a deep well pump; 2. heat preservation and pressure reduction equipment; 3. a pH adjusting device; 31. a pH adjusting box; 32. a dosing pump; 4. a booster pump; 5. a scale and slag filtering and recovering device; 6. a first manual valve; 7. a second manual valve; 8. a third manual valve.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further explained below by combining the specific drawings.
In the description of the present invention, it is to be understood that the terms "longitudinal", "radial", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1, the present invention provides a method for strengthening precipitation of scale by weak alkalization and depressurization, in which a device for strengthening precipitation of scale by weak alkalization and depressurization is adopted, the weak-alkalization pressure-reduction reinforced scale separation device comprises a deep-well pump 1, a heat-preservation pressure-reduction device 2, a pH adjusting device 3, a booster pump 4 and a scale residue filtering and recycling device 5, the deep well pump 1 is arranged in the thermal spring well, the deep well pump 1 is connected with a heat-preservation pressure-reduction device 2 outside the well through a pipeline, the heat-preservation depressurization equipment 2 can be realized by adopting the existing heat-preservation depressurization tank, the pH adjusting device 3 comprises a pH adjusting box 31 and a dosing pump 32, the pH adjusting box 31 is connected with the heat-preservation and pressure-reduction equipment 2 through a chemical feeding pump 32 by a pipeline, the inlet of the booster pump 4 is connected with the lower part of the heat-preservation and pressure-reduction equipment 2 through a pipeline, and the outlet of the booster pump 4 is connected with the scale residue filtering and recycling device 5 through a pipeline;
the method comprises the following steps:
s1, starting the deep well pump 1 to convey hot spring water into the heat-preservation and pressure-reduction equipment 2 under the pressure of 0.1-1.0 MPa, and stopping water inflow when the water amount in the heat-preservation and pressure-reduction equipment 2 exceeds 2/3;
s2, adjusting the pressure in the heat-preservation and pressure-reduction equipment 2 to 0.1-0.2 MPa, releasing the pressure of hot spring water conveyed into the heat-preservation and pressure-reduction equipment 2 to a normal pressure state, keeping the temperature change in the heat-preservation and pressure-reduction equipment 2 within 2 ℃, meanwhile, delivering alkali liquor in a pH adjusting box 31 into the heat-preservation and pressure-reduction equipment 2 through a medicine adding pump 32, adjusting the pH of the hot spring water in the heat-preservation and pressure-reduction equipment 2 to 7.5-9.0, standing for 30-120 minutes, and accelerating the precipitation of calcium carbonate crystal scale substances from the hot spring water in the heat-preservation and pressure-reduction equipment 2 under the conditions of pressure reduction and weak alkali environment; specifically, on the one hand, the following equilibrium equation is presented according to the existing combination reaction of calcium ions in water with carbonate ions and bicarbonate ions
It can be known that, for a vapor-liquid two-phase system, if the total pressure is reduced in the chemical equilibrium reaction equation (1), the reaction proceeds toward the direction of the gas phase substance, and the carbon dioxide (CO) in the equation2) Is the only gas phase product, so the reduction of the partial pressure of the gas phase carbon dioxide in the system (i.e. the reduction of the total pressure) can facilitate the escape of the carbon dioxide from the water (i.e. the generation of the gas phase product), i.e. the chemical equilibrium reaction equation (1) is moved to the right, and the scaling substance calcium carbonate is promoted to be crystallized and separated out; on the other hand, three types of carbonic acid HCO in water according to the graph of FIG. 23 -+CO2、HCO3 -、CO3 2-The existing percentage relation curve shows that the concentration proportion of three types of carbonic acid in the equilibrium has a completely corresponding relation with the pH value, when the pH value of water is at a medium high level, the chemical equilibrium reaction equation (1) moves to the right, and when the pH value of water is higher, the chemical equilibrium reaction equations (2) and (3) move to the right, which can cause more calcium carbonate precipitation and promote the precipitation of scale; the method utilizes the precipitation principle of calcium carbonate salts in the two aspects to realize weak base pressure reduction and strengthened scale precipitation, and solves the scale formation problem in the existing hot spring application project to the maximum extent and the highest efficiency;
s3, starting the booster pump 4, conveying the cleaned suspended scale and attached scale in the heat-preservation and pressure-reduction equipment 2 to the scale residue filtering and recycling device 5 along with the water flow to filter the crystallized scale, directly conveying the filtered hot spring water to the hot spring water pool, closing the booster pump 4 when the water yield of the scale residue filtering and recycling device 5 is reduced by more than 20%, backwashing the scale in the scale residue filtering and recycling device 5 by using the filtered water to realize recycling, and recycling the scale after being subjected to filter pressing and drying treatment.
Compared with the prior art, the weak-alkalization pressure reduction and scale precipitation strengthening method provided by the invention comprises the steps of firstly sending hot spring water into a heat-preservation pressure reduction device under the pressure of 0.1-1.0 MPa, then regulating the pressure in the heat-preservation pressure reduction device to enable the hot spring water to release the pressure to be in a normal pressure state, controlling the temperature change in the heat-preservation pressure reduction device to be within 2 ℃, regulating the pH value in the heat-preservation pressure reduction device to be 7.5-9.0 through a pH regulating device, standing for 30-120 minutes to enable a hot spring water heating medium to accelerate the precipitation of calcium carbonate crystals under the reduced pressure and weak-alkali environment, starting a booster pump after the precipitation of scale, sending water and scale in the heat-preservation pressure reduction device to a scale residue filtering and recovering device through a scale residue filtering and recovering device for filtering and recovering, and directly sending the filtered hot spring water to a hot spring water pool. On one hand, the application promotes the escape of carbon dioxide in the heat-preservation and pressure-reduction equipment through rapid pressure reduction, and greatly improves calcium ions and Carbonate (CO) in hot spring water3 2-) Ions and bicarbonate radical (HCO)3 -) The ions are combined to generate calcium carbonate crystal and are separated out; on the other hand, the pH value of the hot spring raw water in the heat-preservation and pressure-reduction equipment is adjusted to increase the concentration ratio of carbonate ions and bicarbonate ions in the raw water, so that the formation of calcium carbonate salt is promoted, and the calcium carbonate salt is crystallized and separated out. Therefore, the scale formation of the geothermal medium is rapidly completed through the two aspects, the substance elements forming the scale in the geothermal medium are effectively eliminated or reduced, and compared with the prior method of putting the scale inhibitor to realize the scale inhibition, the scale inhibitor can not generate any secondary adverse effect such as corrosion on the conveying channel and the pressure on the environment, the precipitation of the scale in the conveying channel of the thermal medium is reduced or eliminated, the service life of a rear-end facility is prolonged, the maintenance interval period of the facility is prolonged,the operation cost is reduced.
As a specific embodiment, the heat-preservation and pressure-reduction equipment 2 is provided with a pressure gauge for displaying the internal pressure of the equipment and a thermometer for displaying the internal water temperature of the equipment, so that the pressure parameter and the temperature parameter can be read and observed quickly through the pressure gauge and the thermometer, and the heat-preservation and pressure-reduction equipment is convenient and practical.
As a specific embodiment, the scale residue filtering and recycling device 5 is selected to have the temperature resistance of 0-100 ℃, the filtering precision of 1-5 mu m and the backwashing strength of 10-15L/m2And s, and can collect calcium carbonate scale substances after crystallization completely.
As a specific embodiment, please refer to FIG. 1, a pipeline between the deep well pump 1 and the heat-preservation and pressure-reduction equipment 2 is connected with a device for adjusting the pressure in the pipeline to 0.1-1.0 MPa and the flow rate to 5m3The first manual valve 6 of/h, namely, the pressure in the pipeline connecting the deep-well pump 1 with the heat-preservation pressure-reduction equipment 2 can be adjusted to 0.1-1.0 MPa and the flow can be adjusted to 5m through the first manual valve 63The method is fast and convenient.
As a specific embodiment, referring to fig. 1, a second manual valve 7 is connected to a pipeline between the booster pump 4 and the thermal insulation and pressure reduction device 2, and a third manual valve 8 is connected to a dirt recycling pipeline of the dirt and slag filtration and recycling device 5, so that the second manual valve 7 is opened and the third manual valve 8 is closed, thereby forming good partition protection between the thermal insulation and pressure reduction device 2 and the dirt and slag filtration and recycling device 5, and facilitating the delivery of dirt and water into the dirt and slag filtration and recycling device 5 through the booster pump 4; on the contrary, the second manual valve 7 is closed and the third manual valve 8 is opened, so that good partition protection can be formed between the booster pump 4 and the scale and slag filtering and recovering device 5, and scale in the scale and slag filtering and recovering device 5 can be washed and recovered through backwashing water.
In the step S2, the pressure in the thermal insulation and pressure reduction device 2 is adjusted to 0.1 to 0.2MPa, the pH is adjusted to 7.5 to 8.5, and the mixture is left for 50 to 100 minutes, so that the precipitation of calcium carbonate crystals is accelerated by the thermal medium of hot spring water.
In the step S2, the pressure in the thermal insulation and pressure reduction device 2 is adjusted to 0.1MPa, the pH value is adjusted to 8.5, and the concentrations of calcium, magnesium and bicarbonate ions in the water are respectively 17.76mg/l, 5.10mg/l and 661.08mg/l, which are detected by the conventional ion concentration measuring instrument arranged on the pipeline of the scale residue filtering and recovering device 5 for sending the water to the thermal spring pool. The following examples are experimental data of the concentrations of calcium, magnesium and bicarbonate detected in the effluent of the pipeline of the scale residue filtering and recovering device 5 for sending water to the hot spring pool under different pressures and different pH values.
From the above experimental data, it can be seen that the lower the pressure and the higher the pH value, the lower the concentration of calcium, magnesium and bicarbonate ions in the effluent, i.e. the higher the degree of crystallization and scaling.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, 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 or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (7)
1. A weak-alkalization pressure-reducing reinforced scale separation method is characterized in that a weak-alkalization pressure-reducing reinforced scale separation device is adopted in the method, the weak-alkalization pressure-reducing reinforced scale separation device comprises a deep-well pump, heat-preservation pressure-reducing equipment, a pH adjusting device, a booster pump and a scale residue filtering and recovering device, the deep-well pump is arranged in a thermal spring well, the deep-well pump is connected with the heat-preservation pressure-reducing equipment outside the well through a pipeline, the pH adjusting device comprises a pH adjusting box and a dosing pump, the pH adjusting box is connected with the heat-preservation pressure-reducing equipment through a dosing pump, the inlet of the booster pump is connected with the lower part of the heat-preservation pressure-reducing equipment through a pipeline, and the outlet of the booster pump is connected with the scale residue filtering and recovering device through a pipeline;
the method comprises the following steps:
s1, starting the deep well pump to convey hot spring water into heat-preservation and pressure-reduction equipment under the pressure of 0.1-1.0 MPa, and stopping water inflow when the water amount in the heat-preservation and pressure-reduction equipment exceeds 2/3;
s2, adjusting the pressure in the heat-preservation and pressure-reduction equipment to 0.1-0.2 MPa, releasing the pressure of hot spring water conveyed into the heat-preservation and pressure-reduction equipment to a normal pressure state, keeping the temperature change in the heat-preservation and pressure-reduction equipment within 2 ℃, meanwhile, feeding alkali liquor in a pH adjusting box into the heat-preservation and pressure-reduction equipment through a medicine feeding pump, adjusting the pH of the hot spring water in the heat-preservation and pressure-reduction equipment to 7.5-9.0, standing for 30-120 minutes, and accelerating the precipitation of calcium carbonate crystal scaling substances from the hot spring water in the heat-preservation and pressure-reduction equipment under the conditions of pressure reduction and weak base;
s3, starting the booster pump, conveying the cleaned suspended dirt and attached dirt in the heat-insulation and pressure-reduction equipment to a dirt and slag filtering and recycling device along with water flow to filter the crystallized dirt, directly conveying the filtered hot spring water to a hot spring water pool, closing the booster pump when the water yield of the dirt and slag filtering and recycling device is reduced by more than 20%, and backwashing the dirt in the dirt and slag filtering and recycling device by using the filtered water.
2. The weak-alkalization pressure-reducing reinforced scaling method according to claim 1, wherein a pressure gauge for displaying the internal pressure of the equipment and a thermometer for displaying the internal water temperature of the equipment are arranged on the heat-preservation and pressure-reducing equipment.
3. The weak-alkalization pressure-reduction enhanced scale separation method according to claim 1, wherein the scale residue filtering and recycling device is selected from the group consisting of a device capable of resisting temperature of 0-100 ℃, a filtering precision of 1-5 μm, and a backwashing strength of 10-15L/m2S membrane filter.
4. The weak-alkalization pressure-reducing and scale-separating-out strengthening method according to claim 1, wherein a pipeline between the deep-well pump and the heat-preserving and pressure-reducing equipment is connected with a device for regulating the pressure in the pipeline to 0.1-1.0 MPa and the flow to 5m3First manual valve of/h.
5. The weak-alkalization pressure-reducing and scale-separating enhancing method according to claim 1, wherein a second manual valve is connected to a pipeline between the booster pump and the heat-preservation pressure-reducing device, and a third manual valve is connected to a scale recycling pipeline of the scale residue filtering and recycling device.
6. The weak-alkalization pressure-reducing reinforced scale deposition method according to claim 1, wherein in the step S2, the pressure in the heat-preserving and pressure-reducing equipment is adjusted to 0.1-0.2 MPa, the pH is adjusted to 7.5-8.5, and the mixture is left standing for 50-100 minutes.
7. The method of claim 6, wherein in step S2, the pressure in the thermal insulation and depressurization equipment is adjusted to 0.1MPa, the pH is adjusted to 8.5, and the concentrations of Ca, Mg and bicarbonate ions in the water are respectively 17.76mg/l, 5.10mg/l and 661.08mg/l, as detected by an ion concentration measuring instrument installed on the pipeline of the scale residue filtering and recycling device which sends the water to the hot spring pool.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111074806.1A CN113620478A (en) | 2021-09-14 | 2021-09-14 | Weak-alkalization pressure-reducing reinforced scale separation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111074806.1A CN113620478A (en) | 2021-09-14 | 2021-09-14 | Weak-alkalization pressure-reducing reinforced scale separation method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113620478A true CN113620478A (en) | 2021-11-09 |
Family
ID=78390010
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111074806.1A Pending CN113620478A (en) | 2021-09-14 | 2021-09-14 | Weak-alkalization pressure-reducing reinforced scale separation method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113620478A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024070490A1 (en) * | 2022-09-29 | 2024-04-04 | 富士電機株式会社 | Geothermal power generation system and silica scale deposition control method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2186963A1 (en) * | 1996-10-01 | 1998-04-01 | Riad A. Al-Samadi | High Water Recovery Membrane Purification Process |
| CN102725236A (en) * | 2009-04-10 | 2012-10-10 | 纯净源公司 | Method and system for reduction of scaling in purification of aqueous solutions |
| CN110240332A (en) * | 2019-05-30 | 2019-09-17 | 西安建筑科技大学 | Dirty processing method and processing device drops in a kind of softening of crystallization filtering type underground water |
| CN212222575U (en) * | 2020-05-07 | 2020-12-25 | 哈德逊（苏州）水技术有限公司 | High-efficient dirty reactor that hinders |
| CN212740822U (en) * | 2020-04-09 | 2021-03-19 | 河南艾普斯网络科技有限公司 | Circulating water sterilization electrolysis scale removal system |
-
2021
- 2021-09-14 CN CN202111074806.1A patent/CN113620478A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2186963A1 (en) * | 1996-10-01 | 1998-04-01 | Riad A. Al-Samadi | High Water Recovery Membrane Purification Process |
| CN102725236A (en) * | 2009-04-10 | 2012-10-10 | 纯净源公司 | Method and system for reduction of scaling in purification of aqueous solutions |
| CN110240332A (en) * | 2019-05-30 | 2019-09-17 | 西安建筑科技大学 | Dirty processing method and processing device drops in a kind of softening of crystallization filtering type underground water |
| CN212740822U (en) * | 2020-04-09 | 2021-03-19 | 河南艾普斯网络科技有限公司 | Circulating water sterilization electrolysis scale removal system |
| CN212222575U (en) * | 2020-05-07 | 2020-12-25 | 哈德逊（苏州）水技术有限公司 | High-efficient dirty reactor that hinders |
Non-Patent Citations (1)
| Title |
|---|
| 王长贵等: "《新能源发电技术》", 31 October 2003, 中国电力出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024070490A1 (en) * | 2022-09-29 | 2024-04-04 | 富士電機株式会社 | Geothermal power generation system and silica scale deposition control method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10392283B2 (en) | Method and apparatus for treating accompanied water from a well | |
| US5665242A (en) | Inhibition of silica precipitation | |
| JP6186240B2 (en) | Method for evaporating aqueous solution | |
| Hasson et al. | Scale control in saline and wastewater desalination | |
| CN113620478A (en) | Weak-alkalization pressure-reducing reinforced scale separation method | |
| CN102515405A (en) | Geothermal water purification device and method thereof for treating geothermal water | |
| CN215667506U (en) | Weak alkalization decompression reinforced scale precipitation device | |
| CN102126796B (en) | Boiler water treatment composite medicament | |
| CN103910651B (en) | Iminodiacetonitrile continuous crystallisation technique | |
| CN108726540B (en) | Salt production method and salt production system | |
| CN100562493C (en) | Hot method is handled alkali-making mother solution, is produced the ammonium chloride industrialization technology | |
| CN101787541B (en) | Method for removing nitrates through CIM membrane method | |
| JP5537528B2 (en) | Fresh water purification equipment | |
| CN113754120B (en) | Method for enhancing scale precipitation by negative pressure on thermal spring well | |
| CN215886685U (en) | Negative pressure reinforced scale separating device on hot spring well | |
| CN102791639B (en) | Method of extending tailings pond life | |
| JP5672237B2 (en) | Operation method of hot water supply system using heat pump using water quality diagnosis | |
| CN209460224U (en) | A kind of antisludging agent hardness tolerant fastness to alkali performance measuring and evaluating device | |
| US20130001171A1 (en) | Process for controlling hardness in open recirculating systems | |
| CN215886631U (en) | Geothermal supercharging scale inhibition device | |
| CN102491542B (en) | Method for preparing corrosion and scale inhibitor | |
| CN205368203U (en) | Improve concentrated system of third of ten heavenly stems millet dipeptide yield | |
| CN108191128A (en) | A kind of Novel variable-frequency resonance water treatment system structure | |
| CN104928716A (en) | Light salt brine pretreatment device | |
| CN204356182U (en) | Comprehensive recovery and purification system for supernatant wastewater generated after nickel carbonate is prepared by nickel electrolysis liquid purification system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20211109 |
|
| WD01 | Invention patent application deemed withdrawn after publication |