Scale inhibition and concentrated solution excess pressure recycling type underground water purification device and method

Abstract

The invention discloses a scale inhibition and concentrated solution residual pressure recycling type underground water purification device and method. The device comprises an emulsion water distribution pipeline formed by a scale inhibition device, a direct filter membrane, a self-cleaning filter, a precision filter, a security filter, a booster pump A, a reverse osmosis membrane and a desalting water tank which are sequentially connected in series through a pipeline; the other outlet of the reverse osmosis membrane is connected in series with a hydraulic turbine device through a pipeline to form a wastewater discharge pipeline; the booster pump A and the hydraulic turbine device are connected through a pipeline to form a branch; the emulsion water distribution pipeline is positioned at the tail end of the desalting water tank and is serially connected with a booster pump B; a special scale inhibition device is additionally arranged at the front end of a direct filter membrane to replace dosing for descaling, and pressure energy of concentrated liquid subjected to reverse osmosis treatment can be recycled by a hydraulic turbine device and is converted into mechanical energy to drag a booster pump at the front end of a reverse osmosis membrane, so that the energy consumption is reduced.

Description

Technical Field

[0001] The invention relates to the field of mine water resource utilization and residual pressure utilization, and in particular to a scale inhibition and concentrated liquid residual pressure recycling underground water purification device, and also to a scale inhibition and concentrated liquid residual pressure recycling underground water purification method. Background Art

[0002] The main uses of production water in coal mines are spray dust removal at the coal mining face, cooling of fully mechanized mining equipment and emulsion proportioning. The requirements for water quality vary greatly for different uses.

[0003] The traditional mine water treatment process mainly adopts the process of "collecting and lifting underground - processing on the ground - pumping back to the underground for use". This method has problems such as long processing process, high energy consumption and large floor space. The process flow of the traditional water treatment system is: lifting the underground raw water to the ground → raw water tank → raw water pump → adding flocculant and bactericide device → quartz sand filter → activated carbon filter → adding antiscalant and reducing agent device → security filter → high-pressure water pump → reverse osmosis membrane assembly → desalted water tank → desalted water pump → emulsion proportioning system. Although the traditional water treatment device can filter the raw water, it has low integration and occupies a large area. Summary of the invention

[0004] To this end, the present invention provides a downhole water purification device with scale inhibition and concentrated liquid residual pressure recycling, so as to solve the above-mentioned problems in the prior art of long traditional process flow, high lifting energy consumption and large land occupation. In order to achieve the above-mentioned purpose, the present invention provides the following technical scheme: According to the first aspect of the present invention, a downhole water purification device with scale inhibition and concentrated liquid residual pressure recycling, the device includes a scale inhibition device, a direct filtration membrane, a self-cleaning filter, a precision filter, a security filter, a booster pump A, a reverse osmosis membrane, and a desalted water tank connected in series through pipelines to form an emulsion water distribution pipeline; the other outlet of the reverse osmosis membrane is connected in series with a hydraulic turbine device through a pipeline to form a wastewater discharge pipeline; the booster pump A and the hydraulic turbine device are connected by a pipeline to form a branch; the emulsion water distribution pipeline is located at the end of the desalted water tank and is connected in series with a booster pump B.

[0005] Furthermore, a coupling B, an explosion-proof motor and a coupling A are connected in series on the branch line between the boost pump A and the hydraulic turbine device.

[0006] Furthermore, the booster pump A, the coupling B, the explosion-proof motor, the coupling A and the hydraulic turbine device are coaxially connected.

[0007] Furthermore, coupling A and coupling B have the same structure.

[0008] Furthermore, booster pump A and booster pump B have the same structure.

[0009] According to a second aspect of the present invention, a method for purifying well water using the downhole water purification device of any one of the first aspects of the present invention is characterized by comprising the following steps:

[0010] Step S100, the mine raw water is scale-inhibited by the scale-inhibiting device, and then passes through the direct filtration membrane, the self-cleaning filter, the precision filter, the security filter, and then is pressed into the reverse osmosis membrane by the booster pump A. The mine raw water is processed to form demineralized water, which is then input into the demineralized water tank for storage, and then is pressed to various places underground by the booster pump B for reuse;

[0011] Step S200, the hydraulic turbine device connected in parallel to the other outlet pipeline of the reverse osmosis membrane recovers the pressure energy of the high-pressure concentrated liquid formed by the reverse osmosis membrane treatment and converts it into mechanical energy, and its energy recovery pipeline is a loop formed by the coaxial connection of the coupling A, the explosion-proof motor, the coupling B and the booster pump A, thereby reducing the energy loss of the booster pump A;

[0012] Step S300: The high-pressure concentrated liquid is converted into low-pressure concentrated liquid for discharge through a hydraulic turbine device.

[0013] The present invention has the following advantages:

[0014] 1. The device can effectively remove impurities such as mud, coal powder, rust, colloids, organic pollutants and inorganic salt ions in the raw water underground, meeting the demand for high-purity water underground.

[0015] 2. Direct filtration membrane can replace traditional coagulation sedimentation filtration device.

[0016] 3. The scale inhibition device replaces the descaling by adding chemicals, reducing the cost of using chemicals.

[0017] 4. Reverse osmosis high-pressure concentrated liquid can convert pressure energy into mechanical energy through a hydraulic turbine device. Through the connection of a coupling and an explosion-proof motor, it can reduce the loss of the booster pump, thereby saving energy and reducing consumption, thereby reducing production costs for coal mines.

[0018] 5. According to the size of the underground space, the raw water from the mine is directly processed underground without the need to be lifted and then pumped back into the mine for reuse. This has a short process, small footprint, low energy consumption and a high degree of automation.

[0019] 6. Without changing the original drainage system structure, in case of a fault, the coupling can be disconnected to ensure the normal operation of the mine water drainage system, to ensure that underground production is not hindered and underground safety is guaranteed.

[0020] 7. The equipment involved in the present invention are all mature and standardized products on the market, which are easy to assemble and have good promotion significance. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1An expanded structural diagram of a downhole water purification device for scale inhibition and concentrated liquid residual pressure recycling provided in some embodiments of the present invention.

[0022] In the figure, 1. scale prevention device, 2. direct filtration membrane, 3. self-cleaning filter, 4. precision filter, 5. security filter, 6. booster pump A, 7. reverse osmosis membrane, 8. hydraulic turbine device, 9. coupling A, 10. explosion-proof motor, 11. coupling B, 12. desalted water tank, 13. booster pump B. DETAILED DESCRIPTION

[0023] The following is a description of the implementation of the present invention by specific embodiments. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] Example 1

[0025] like Figure 1 As shown, a scale prevention and concentrated liquid residual pressure recycling type downhole water purification device in the embodiment of the first aspect of the present invention comprises a scale prevention device 1, a direct filtration membrane 2, a self-cleaning filter 3, a precision filter 4, a security filter 5, a booster pump A6, a reverse osmosis membrane 7, and a desalted water tank 12 which are connected in series through pipelines in sequence to form an emulsion water distribution pipeline; the other outlet of the reverse osmosis membrane 7 is connected in series with a hydraulic turbine device 8 through a pipeline to form a wastewater discharge pipeline; the booster pump A6 and the hydraulic turbine device 8 are connected by a pipeline to form a branch; the emulsion water distribution pipeline is located at the end of the desalted water tank 12 and is connected in series with a booster pump B13.

[0026] In the above embodiment, it should be noted that, when in use, the system prevents scaling of the pipeline through the scale inhibition device 1 and replaces the scale removal by adding chemicals to prevent scaling. After the traditional coagulation and sedimentation filtration is replaced by the direct filtration membrane 2, the concentrated liquid treated by the reverse osmosis membrane 7 uses the hydraulic turbine device 8 to convert the recovered pressure energy into mechanical energy; the desalted water treated by the reverse osmosis membrane 7 can be reused on-site underground, avoiding the cost of lifting it to the ground water treatment station for treatment.

[0027] The technical effects achieved by the above embodiments are:

[0028] 1. The device can effectively remove impurities such as mud, coal powder, rust, colloids, organic pollutants and inorganic salt ions in the raw water underground, meeting the demand for high-purity water underground.

[0029] 2. Direct filtration membrane can replace traditional coagulation sedimentation filtration device.

[0030] 3. The scale inhibition device replaces the descaling by adding chemicals, reducing the cost of using chemicals.

[0031] 4. Reverse osmosis high-pressure concentrated liquid can convert pressure energy into mechanical energy through a hydraulic turbine device. Through the connection of a coupling and an explosion-proof motor, it can reduce the loss of the booster pump, thereby saving energy and reducing consumption, thereby reducing production costs for coal mines.

[0032] 5. According to the size of the underground space, the raw water from the mine is directly processed underground without the need to be lifted and then pumped back into the mine for reuse. This has a short process, small footprint, low energy consumption and a high degree of automation.

[0033] 6. Without changing the original drainage system structure, in case of a fault, the coupling can be disconnected to ensure the normal operation of the mine water drainage system, to ensure that underground production is not hindered and underground safety is guaranteed.

[0034] 7. The equipment involved in the present invention are all mature and standardized products on the market, which are easy to assemble and have good promotion significance.

[0035] Example 2

[0036] like Figure 1 As shown, a scale prevention and concentrated liquid residual pressure recycling downhole water purification device includes all the contents of Example 1. In addition, a coupling B11, an explosion-proof motor 10 and a coupling A9 are connected in series on the branch line between the booster pump A6 and the hydraulic turbine device 8.

[0037] Optionally, the boost pump A6, the coupling B11, the explosion-proof motor 10, the coupling A9 and the hydraulic turbine device 8 are coaxially connected.

[0038] Optionally, coupling A9 and coupling B11 have the same structure.

[0039] The technical effect achieved by the above embodiment is: the explosion-proof motor 10 and the booster pump A6 are coaxially connected via the coupling A9 and the coupling B11, which can reduce the power consumption of the pump and achieve energy saving and consumption reduction.

[0040] Example 3

[0041] like Figure 1 As shown, a scale inhibition and concentrated liquid residual pressure recycling downhole water purification device includes all the contents of Example 2. In addition, the booster pump A6 has the same structure as the booster pump B13.

[0042] The technical effect achieved by the above embodiment is: through the above arrangement, the processing cost is significantly reduced.

[0043] Example 4

[0044] like Figure 1As shown, a downhole integrated water purification method with pipeline scale prevention and concentrated liquid residual pressure recycling is provided, using a downhole water purification device with scale prevention and concentrated liquid residual pressure recycling of embodiments 1 to 3, and in addition, comprising the following steps:

[0045] Step S100, the mine raw water is scale-inhibited by the scale-inhibiting device 1, and then passes through the direct filtration membrane 2, the self-cleaning filter 3, the precision filter 4, the security filter 5, and then is pressed into the reverse osmosis membrane 7 by the booster pump A6. After the mine raw water is treated to form demineralized water, it is input into the demineralized water tank 12 for storage, and then is pressed to various places underground for reuse by the booster pump B13;

[0046] Step S200, the hydraulic turbine device 8 connected in parallel to the other outlet pipeline of the reverse osmosis membrane 7 recovers the pressure energy of the high-pressure concentrated liquid formed by the treatment of the reverse osmosis membrane 7 and converts it into mechanical energy, and its energy recovery pipeline is a loop formed by the coaxial connection of the coupling A9, the explosion-proof motor 10, the coupling B11 and the booster pump A6, thereby reducing the energy loss of the booster pump A6;

[0047] Step S300: The high-pressure concentrated liquid is converted into low-pressure concentrated liquid for discharge through the hydraulic turbine device 8.

[0048] In the description of the present invention, it is to be understood that the terms “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0049] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0050] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0051] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0052] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

[0053] In the description of this specification, the description with reference to the terms "embodiment one", "embodiment two", "example", "specific example", or "some examples" means that the specific method, device or feature described in conjunction with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, methods, devices or features described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0054] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A scale inhibition and concentrated liquid residual pressure recycling downhole water purification device, characterized in that: The device comprises an emulsion water distribution pipeline formed by a scale prevention device (1), a direct filtration membrane (2), a self-cleaning filter (3), a precision filter (4), a security filter (5), a booster pump A (6), a reverse osmosis membrane (7), and a desalted water tank (12) connected in series via pipelines in sequence; the other outlet of the reverse osmosis membrane (7) is connected in series with a hydraulic turbine device (8) via a pipeline to form a wastewater discharge pipeline; the booster pump A (6) and the hydraulic turbine device (8) are connected via pipelines to form a branch; the emulsion water distribution pipeline is located at the end of the desalted water tank (12) and is connected in series with a booster pump B (13).

2. The scale inhibition and concentrated liquid residual pressure recycling downhole water purification device according to claim 1 is characterized in that: A coupling B (11), an explosion-proof motor (10) and a coupling A (9) are connected in series on a branch line between a booster pump A (6) and a hydraulic turbine device (8).

3. The scale inhibition and concentrated liquid residual pressure recycling downhole water purification device according to claim 2 is characterized in that: The booster pump A (6), the coupling B (11), the explosion-proof motor (10), the coupling A (9) and the hydraulic turbine device (8) are coaxially connected.

4. The scale inhibition and concentrated liquid residual pressure recycling downhole water purification device according to claim 3 is characterized in that: Coupling A (9) and coupling B (11) have the same structure.

5. The scale inhibition and concentrated liquid residual pressure recycling downhole water purification device according to claim 1 is characterized in that: The booster pump A (6) and the booster pump B (13) have the same structure.

6. A method for purifying well water using the downhole water purification device according to any one of claims 1 to 5, characterized in that: The method comprises the following steps: Step S100, the mine raw water is scale-inhibited by the scale-inhibiting device (1), and then passes through the direct filtration membrane (2), the self-cleaning filter (3), the precision filter (4), the security filter (5), and then is pressed into the reverse osmosis membrane (7) by the booster pump A (6). The mine raw water is treated to form demineralized water, which is then input into the demineralized water tank (12) for storage, and then is pressed to various places underground by the booster pump B (13) for reuse; Step S200, a hydraulic turbine device (8) connected in parallel to another outlet pipeline of the reverse osmosis membrane (7) recovers pressure energy of the high-pressure concentrated liquid formed by the treatment of the reverse osmosis membrane (7) and converts it into mechanical energy, wherein the energy recovery pipeline is a loop formed by coaxially connecting the coupling A (9), the explosion-proof motor (10), the coupling B (11) and the booster pump A (6), thereby reducing the energy loss of the booster pump A (6); Step S300: The high-pressure concentrated liquid is converted into low-pressure concentrated liquid for discharge through the hydraulic turbine device (8).

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