阅读说明：本技术 一种地热增压阻垢方法 (Geothermal pressurizing scale inhibition method ) 是由 蒋春华 陆恿 张兆新 潘培军 石永泉 于 2021-09-14 设计创作，主要内容包括：本发明提供一种地热增压阻垢方法,包括以下步骤：S1、启动深井泵,通过井控装置变频控制深井泵流量及扬程,将温泉水压力增压至0.1～1.0MPa下输送至电磁阻垢器；S2、温泉水经过电磁阻垢器,利用交变电场及磁场切割水分子,在洛仑磁力作用下防止垢体凝聚改变垢体结垢,垢物元素在物电作用下进一步相互阻滞；S3、井控装置对管道内包括水压、水温和流量在内的数据进行检测,综合分析后改变电磁阻垢器的输出频率和功率,达到最佳阻垢效果；S4、粗砂过滤器对温水中的粗粒沙石进行滤除,过滤后的温泉水直接送至温泉水池,井控装置对粗砂过滤器的出水压力进行监测以控制粗砂过滤器进行反冲洗。本申请通过井下增压技术和井上电磁防垢技术相结合来加强阻垢。(The invention provides a geothermal pressurizing scale inhibition method, which comprises the following steps: s1, starting a deep well pump, controlling the flow and the lift of the deep well pump through frequency conversion of a well control device, pressurizing the pressure of hot spring water to 0.1-1.0 MPa, and conveying the hot spring water to an electromagnetic scale inhibitor; s2, the hot spring water passes through an electromagnetic scale inhibitor, water molecules are cut by using an alternating electric field and a magnetic field, scale agglomeration is prevented under the action of Loran magnetic force, scale formation of the scales is changed, and scale elements are further blocked mutually under the action of bioelectricity; s3, detecting data including water pressure, water temperature and flow in the pipeline by the well control device, and changing the output frequency and power of the electromagnetic scale inhibitor after comprehensive analysis to achieve the optimal scale inhibition effect; s4, filtering coarse grains of sand and stone in the hot water by the coarse sand filter, directly sending the filtered hot spring water to a hot spring water pool, and monitoring the water outlet pressure of the coarse sand filter by the well control device to control the coarse sand filter to carry out backwashing. This application is through the combination of pressurization technique in the pit and the electromagnetic antiscaling technique in the pit to strengthen inhibiting dirt.)

1. The geothermal pressurizing scale inhibition method is characterized in that a geothermal pressurizing scale inhibition device is adopted, the geothermal pressurizing scale inhibition device comprises a deep well pump, an electromagnetic scale inhibitor, a well control device and a coarse sand filter, the deep well pump is arranged in a thermal spring well, the deep well pump is connected with the input end of the electromagnetic scale inhibitor outside the well through a pipeline, the output end of the electromagnetic scale inhibitor is connected with the water inlet of the well control device through a pipeline, the water outlet of the well control device is connected with the coarse sand filter through a pipeline, and the deep well pump, the electromagnetic scale inhibitor and the coarse sand filter are all electrically connected with the well control device;

the method comprises the following steps:

s1, starting the deep well pump, controlling the flow and the lift of the deep well pump through the frequency conversion of the well control device, pressurizing the pressure of hot spring water to 0.1-1.0 MPa, and conveying the hot spring water to the electromagnetic scale inhibitor, wherein scale elements in a pipeline between the deep well pump and the electromagnetic scale inhibitor are mutually blocked and combined under the action of the physical therapy;

s2, the hot spring water passes through the electromagnetic scale inhibitor, water molecules are cut by using an alternating electric field and a magnetic field, scale agglomeration is prevented under the action of Lorentz magnetic force, scale formation of the scales is changed, and scale elements are further blocked mutually under the action of bioelectricity;

s3, the well control device detects data including water pressure, water temperature and flow rate in the pipeline, and changes the output frequency and power of the electromagnetic scale inhibitor after comprehensive analysis to achieve the best scale inhibition effect;

s4, filtering coarse grains of sand and stone in the hot water by the coarse sand filter, directly sending the filtered hot spring water to a hot spring water pool, monitoring the water outlet pressure of the coarse sand filter by the well control device, and increasing the water outlet pressure to 2.5kg/cm²And controlling the coarse sand filter to perform back flushing.

2. The geothermal pressurizing scale inhibition method according to claim 1, wherein the electromagnetic scale inhibitor is an electromagnetic scale inhibitor with an environment temperature resistance of-10 to 75 ℃, an output frequency of 50 to 200kHz and an input power of 1.2 to 100W.

3. The geothermal pressurizing scale inhibition method according to claim 1, wherein a pressure gauge for displaying the pressure of the hot spring water and a temperature gauge for displaying the temperature of the hot spring water are arranged on the well control device.

4. The geothermal pressurizing scale inhibition method according to claim 1, wherein the coarse sand filter is filter equipment which can resist 0-100 ℃ and has a filtering precision of 10-50 μm.

5. The geothermal pressurizing scale inhibition method according to claim 1, wherein a coarse sand filter material in the coarse sand filter is quartz sand or diatomite.

6. The geothermal pressurizing scale inhibition method according to claim 1, wherein a first manual valve is connected to a pipeline between the well control device and the coarse sand filter, a back flush water discharge branch pipe is connected to a pipeline between the first manual valve and the coarse sand filter in parallel, and a second manual valve is connected to the back flush water discharge branch pipe.

7. The geothermal pressurizing scale inhibition method according to claim 1, wherein the coarse sand filter is used for filtering the coarse sandThe strength of the row back washing is 10-15L/m²S for 5 to 30 minutes.

8. The geothermal pressurizing scale inhibition method according to claim 1, wherein the deep well pump pressurizes the hot spring water to 0.5-1.0 MPa, and the flow rate in the pipeline is adjusted to 5m³After the reaction is carried out for three days after the reaction is finished, the concentrations of calcium ions, magnesium ions and bicarbonate ions in the water are detected to be 175.78mg/l, 68.53mg/l and 1214.75mg/l respectively by an ion concentration measuring instrument arranged on a coarse sand filter and used for sending the water to a pipeline of a hot spring pool.

Technical Field

The invention relates to the technical field of geothermal resource development and utilization, in particular to a geothermal pressurizing scale inhibition 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 geothermal pressurizing scale inhibition method, aiming at the technical problems that scale inhibition in the process of applying geothermal effluent to a terminal is generally realized by adding a scale inhibitor into a raw heat medium box arranged at the rear end of a geothermal well, the scale inhibitor medium can generate secondary adverse effects such as corrosion with uncertain degree on a conveying channel, and simultaneously, a weakly acidic medium must be subjected to secondary treatment or the environment is influenced.

In order to solve the technical problems, the invention adopts the following technical scheme:

a geothermal pressurizing scale inhibition method adopts a geothermal pressurizing scale inhibition device, wherein the geothermal pressurizing scale inhibition device comprises a deep well pump, an electromagnetic scale inhibitor, a well control device and a coarse sand filter, the deep well pump is arranged in a thermal spring well, the deep well pump is connected with the input end of the electromagnetic scale inhibitor outside the well through a pipeline, the output end of the electromagnetic scale inhibitor is connected with the water inlet of the well control device through a pipeline, the water outlet of the well control device is connected with the coarse sand filter through a pipeline, and the deep well pump, the electromagnetic scale inhibitor and the coarse sand filter are all electrically connected with the well control device;

the method comprises the following steps:

s1, starting the deep well pump, controlling the flow and the lift of the deep well pump through the frequency conversion of the well control device, pressurizing the pressure of hot spring water to 0.1-1.0 MPa, and conveying the hot spring water to the electromagnetic scale inhibitor, wherein scale elements in a pipeline between the deep well pump and the electromagnetic scale inhibitor are mutually blocked and combined under the action of the physical therapy;

s2, the hot spring water passes through the electromagnetic scale inhibitor, water molecules are cut by using an alternating electric field and a magnetic field, scale agglomeration is prevented under the action of Lorentz magnetic force, scale formation of the scales is changed, and scale elements are further blocked mutually under the action of bioelectricity;

s3, the well control device detects data including water pressure, water temperature and flow rate in the pipeline, and changes the output frequency and power of the electromagnetic scale inhibitor after comprehensive analysis to achieve the best scale inhibition effect;

s4, filtering coarse grains of sand and stone in the hot water by the coarse sand filter, directly sending the filtered hot spring water to a hot spring water pool, monitoring the water outlet pressure of the coarse sand filter by the well control device, and increasing the water outlet pressure to 2.5kg/cm²And controlling the coarse sand filter to perform back flushing.

Compared with the prior art, the geothermal pressurizing scale inhibition method provided by the invention comprises the steps of firstly, under the frequency conversion control of a well control device, pressurizing and adjusting the pressure in a hot spring in a pipeline to 0.1-1.0 MPa by a deep well pump, conveying the hot spring to an electromagnetic scale inhibitor, enabling the hot spring water to pass through the electromagnetic scale inhibitor, cutting water molecules by the electromagnetic scale inhibitor by using an alternating electric field and a magnetic field, preventing scale bodies from coagulating under the Loran magnetic force to change scale formation of the scale bodies, further blocking scale body elements mutually under the action of bioelectricity, detecting water pressure, water temperature and flow data in the pipeline by the well control device, controlling the electromagnetic scale inhibitor to change output frequency and power after comprehensive analysis to achieve the optimal scale inhibition effect, finally filtering large particle impurities such as gravel and stone in the hot spring water by a coarse sand filter, and directly conveying the filtered hot spring water to a hot spring water pool for use. On one hand, the pressure in the underground pipeline is boosted and adjusted to 0.1-1.0 MPa through the deep-well pump, so that scale elements in the pipeline are mutually retarded and combined under the action of the physiology, calcium ions and carbonate ions are promoted to form non-scaling calcium bicarbonate under the action of water, thus the scaling of the underground pipeline can be slowed down or eliminated through the underground boosting technology, the maintenance period of the underground pipeline is prolonged, and the engineering maintenance cost is effectively reduced; on the other hand, the electromagnetic scale inhibitor is combined with the aboveground pipeline, so that the scale inhibition effect is enhanced; on the other hand, the sand is removed through the coarse sand filter, so that the unfavorable risk of sand particles to the rear end joint facility is effectively reduced. Therefore, the underground supercharging and the aboveground electromagnetic scale inhibition technology are combined to strengthen the geothermal scale inhibition effect, scale inhibition is carried out in a pure physical mode, and any scale inhibition agent is not required to be added, so that the water quality characteristic cannot be changed, pipeline corrosion and water quality damage cannot be caused, 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, the electromagnetic scale inhibitor is characterized in that the electromagnetic scale inhibitor has the environmental temperature resistance of-10-75 ℃, the output frequency of 50-200 kHz and the input power of 1.2-100W.

Furthermore, a pressure gauge for displaying the pressure of the hot spring water and a thermometer for displaying the temperature of the hot spring water are arranged on the well control device.

Furthermore, the coarse sand filter is filter equipment which can resist the temperature of 0-100 ℃ and has the filtering precision of 10-50 mu m.

Furthermore, the coarse sand filter material in the coarse sand filter is quartz sand or diatomite.

Furthermore, be connected with first manual valve on the pipeline between well control device and the grit filter, be connected with back flush drainage branch pipe on the pipeline between first manual valve and the grit filter, be connected with the manual valve of second on the back flush drainage branch pipe.

Further, the strength of the coarse sand filter for back washing is 10-15L/m²S for 5 to 30 minutes.

Further, the deep well pump boosts the pressure of the hot spring water to 0.5-1.0 MPa, and the flow rate in the pipeline is adjusted to 5m³After the reaction is carried out for three days after the reaction is finished, the concentrations of calcium ions, magnesium ions and bicarbonate ions in the water are detected to be 175.78mg/l, 68.53mg/l and 1214.75mg/l respectively by an ion concentration measuring instrument arranged on a coarse sand filter and used for sending the water to a pipeline of a hot spring pool.

Drawings

FIG. 1 is a schematic structural diagram of a geothermal pressurizing scale inhibition device provided by the invention.

In the figure, 1, a deep well pump; 2. an electromagnetic scale inhibitor; 3. a well control device; 4. a coarse sand filter; 5. a first manual valve; 6. a second 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 invention provides a geothermal pressurizing scale inhibition method, in which a geothermal pressurizing scale inhibition device is adopted, the geothermal pressurizing scale inhibition device comprises a deep well pump 1, an electromagnetic scale inhibitor 2, a well control device 3 and a coarse sand filter 4, the deep well pump 1 is arranged in a thermal spring well, the deep well pump 1 is connected with the input end of the electromagnetic scale inhibitor 2 outside the well through a pipeline, the output end of the electromagnetic scale inhibitor 2 is connected with the water inlet of the well control device 3 through a pipeline, the well control device 3 can be realized by adopting the existing well control device 3, the water outlet of the well control device 3 is connected with the coarse sand filter 4 through a pipeline, and the deep well pump 1, the electromagnetic scale inhibitor 2 and the coarse sand filter 4 are all electrically connected with the well control device 3 so as to facilitate the well control device 3 to control each device;

the method comprises the following steps:

s1, starting the deep well pump 1, controlling the flow and the lift of the deep well pump 1 through the frequency conversion of the well control device 3, pressurizing the pressure of hot spring water to 0.1-1.0 MPa, and conveying the hot spring water to the electromagnetic scale inhibitor 2, wherein scale elements in a pipeline between the deep well pump 1 and the electromagnetic scale inhibitor 2 are mutually retarded and combined under the action of the physical therapy, so that calcium ions and carbonate ions are promoted to form non-scaling calcium bicarbonate under the action of water; specifically, the principle equation of physical and chemical action is as follows:

s2, the hot spring water passes through the electromagnetic scale inhibitor 2, the alternating electric field and the magnetic field are used for cutting water molecules, scale agglomeration is prevented under the action of Lorentn magnetic force, scale formation is changed, scale elements are further blocked mutually under the action of bioelectricity, and the principle equation of the bioelectricity action is as follows:

specifically, the electromagnetic scale inhibition is to cut water molecules by using an alternating electric field and a magnetic field, under the action of Loran magnetic force, large molecular group water is cut into small molecular group water, positive ions and negative ions move according to a left-right spiral track, and are mutually combined under the action of static electricity to form micro-crystal grains, and the micro-crystal grains are not mutually condensed and adsorbed on the pipe wall under the surrounding of the small molecular group water, so that the electromagnetic scale inhibition has the scale prevention effect;

s3, the well control device 3 detects data including water pressure, water temperature and flow in a pipeline, the output frequency and power of the electromagnetic scale inhibitor 2 are changed after comprehensive analysis, and the optimal scale inhibition effect is achieved, namely the well control device 3 controls the output frequency and power of the electromagnetic scale inhibitor 2, so that the electromagnetic scale inhibitor 2 outputs a sine wave electric field and a sine wave magnetic field to cut water molecules;

s4, filtering large-particle coarse-grained sand and stone such as gravel and stones in the hot water by the coarse sand filter 4, directly sending the filtered hot spring water to a hot spring pool, monitoring the water outlet pressure of the coarse sand filter 4 by the well control device 3, and increasing the water outlet pressure to 2.5kg/cm²And controlling the coarse sand filter 4 to perform back flushing so as to ensure the normal operation of the coarse sand filter 4.

Compared with the prior art, the geothermal pressurizing scale inhibition method provided by the invention comprises the steps of firstly, under the frequency conversion control of a well control device, pressurizing and adjusting the pressure in a hot spring in a pipeline to 0.1-1.0 MPa by a deep well pump, conveying the hot spring to an electromagnetic scale inhibitor, enabling the hot spring water to pass through the electromagnetic scale inhibitor, cutting water molecules by the electromagnetic scale inhibitor by using an alternating electric field and a magnetic field, preventing scale bodies from coagulating under the Loran magnetic force to change scale formation of the scale bodies, further blocking scale body elements mutually under the action of bioelectricity, detecting water pressure, water temperature and flow data in the pipeline by the well control device, controlling the electromagnetic scale inhibitor to change output frequency and power after comprehensive analysis to achieve the optimal scale inhibition effect, finally filtering large particle impurities such as gravel and stone in the hot spring water by a coarse sand filter, and directly conveying the filtered hot spring water to a hot spring water pool for use. On one hand, the pressure in the underground pipeline is boosted and adjusted to 0.1-1.0 MPa through the deep-well pump, so that scale elements in the pipeline are mutually retarded and combined under the action of the physiology, calcium ions and carbonate ions are promoted to form non-scaling calcium bicarbonate under the action of water, thus the scaling of the underground pipeline can be slowed down or eliminated through the underground boosting technology, the maintenance period of the underground pipeline is prolonged, and the engineering maintenance cost is effectively reduced; on the other hand, the electromagnetic scale inhibitor is combined with the aboveground pipeline, so that the scale inhibition effect is enhanced; on the other hand, the sand is removed through the coarse sand filter, so that the unfavorable risk of sand particles to the rear end joint facility is effectively reduced. Therefore, the underground supercharging and the aboveground electromagnetic scale inhibition technology are combined to strengthen the geothermal scale inhibition effect, scale inhibition is carried out in a pure physical mode, and any scale inhibition agent is not required to be added, so that the water quality characteristic cannot be changed, pipeline corrosion and water quality damage cannot be caused, 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.

As a specific embodiment, the electromagnetic scale inhibitor 2 is an existing electromagnetic scale inhibitor with the environmental temperature resistance of-10 to 75 ℃, the output frequency of 50 to 200kHz and the input power of 1.2 to 100W, so that ions in water can be promoted to form suspended clots, the suspended clots are changed into fine crystals in hot water, calcium and magnesium can be adsorbed on the crystals to form scale which flows away along with water flow and cannot be adhered to the surfaces of pipelines and equipment, and scale formation can be prevented and old scale can be promoted to fall off.

As a specific embodiment, the well control device 3 is provided with a pressure gauge for displaying the pressure of the hot spring water and a thermometer for displaying the temperature of the hot spring water, so that the pressure parameter and the temperature parameter can be read and observed quickly through the pressure gauge and the thermometer, and the well control device is convenient and practical.

As a specific embodiment, the coarse sand filter 4 is made of existing filter equipment which can resist temperature of 0-100 ℃ and has filtering precision of 10-50 mu m, so that suspended particles with particle sizes of more than 10-50 mu m in underground water and old scales falling off from pipelines can be filtered, and the effect of purifying water quality is achieved.

As a specific embodiment, the coarse sand filter material in the coarse sand filter 4 is a high-temperature resistant granular filter material such as quartz sand or diatomite, so that large granular impurities such as gravel and stones in water can be completely removed.

As a specific example, referring to fig. 1, a first manual valve 5 is connected to a pipeline between the well control device 3 and the coarse sand filter 4, a backwash drain branch pipe is connected to a pipeline between the first manual valve 5 and the coarse sand filter 4 in parallel, and a second manual valve 6 is connected to the backwash drain branch pipe, so that the first manual valve 5 is opened and the second manual valve 6 is closed, and coarse gravel in hot spring water can be filtered; whereas the first manual valve 5 is closed and the second manual valve 6 is opened, the coarse sand filter 4 can be backwashed, and the backwash water is discharged to the external drain through the backwash discharge branch pipe.

As a specific embodiment, the strength of the back washing of the coarse sand filter 4 is 10-15L/m²And s, the time is 5-30 minutes, so that particles and old scales in the filter can be washed away, and excessive hardening of impurity particles and blockage of the filter are prevented.

As a specific embodiment, the deep well pump 1 pressurizes the hot spring water to 0.5-1.0 MPa, and the flow rate in the pipeline is adjusted to 5m³After the reaction is carried out for three days after the reaction is finished, the concentration of calcium, magnesium and bicarbonate radical ions in the water is detected to be 175.78mg/l, 68.53mg/l and 1214.75mg/l respectively by an existing ion concentration measuring instrument arranged on a pipeline of the coarse sand filter 4 for sending the water to the hot spring pool. The following examples are experimental data of the concentrations of calcium, magnesium and bicarbonate detected in the water flowing out of the pipeline of the coarse sand filter 4 from the water supply to the hot spring pool under different pressures, different flow rates and different operation times.

From the above experimental data, it can be seen that, as the operation time increases, the loss of calcium magnesium and bicarbonate ions in the control group is obvious, the scaling is more severe in one day than in one day, and the scaling in the first experiment and the second experiment is lighter, indicating that the scale inhibition degree is high.

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.