Mine water treatment plant

Abstract

The application discloses a kind of mine water treatment devices, belong to mine water treatment technical field.The device of the application includes pre-sedimentation tank and electrochemical softening device, and total water inlet pipe and charging tank are arranged on the pre-sedimentation tank, the inner chamber of electrochemical softening device is divided into anode chamber, cathode chamber, anode chamber, cathode chamber four compartments by the vertical partition consisting of closed partition and cation exchange membrane, the top of two cathode chambers is connected with the top of pre-sedimentation tank, and the top of two anode chambers is connected with softening effluent pipe.The device of the application is scientific in design, reasonable in structure, simple in manufacture, convenient to use, good in treatment effect, and the use of the device can make mine water reach the purpose of softening, and improve the reuse rate of mine water.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of coal mine production, in particular to the treatment of mine water, and specifically relates to a mine water treatment device. BACKGROUND

[0002] Coal resources are important energy and chemical raw materials for human life and production, and the global coal resources have large reserves, wide distribution and high output. However, a large amount of mine water is generated in the process of coal resource exploitation. According to statistics, about 2 tons of mine water are generated per ton of coal mined in the Netherlands and China, and about 3 tons of mine water are generated per ton of coal mined in the United Kingdom, so it is estimated that about 100 billion tons of mine water will be generated globally each year.

[0003] However, due to the double influence of natural water-rock interaction and human mining activities, the mine water contains pollutants such as suspended solids, salts, and special components, and direct and unordered discharge will induce problems such as water resource waste, water environment pollution, and surface ecological destruction. Therefore, it is very important to treat mine water resources for production, life, ecology, etc. At the same time, if mine water can be reasonably utilized, it will also greatly alleviate the situation of water resource shortage.

[0004] Mine water can be applied to dust reduction in underground coal mines, but the current problem is that mine water contains part of coal dust and rock dust, and many scale-forming ions, which not only affect the dust reduction effect, but also cause the blockage of the dust reduction atomizing nozzle. This leads to an increase in the cost of mine water reuse and does not achieve the initial effect. There is an urgent need for a mine water treatment technology.

[0005] The current conventional mine water treatment methods mainly include: chemical softening method, ion exchange method, and membrane separation technology. The chemical softening method is to add chemicals to the mine water to roughly remove the scale-forming ions in the mine water, which cannot remove the scale-forming ions in depth; the ion exchange method has mature technology and high removal rate, but the disadvantages are that the ion exchange membrane needs to be regenerated, the regeneration process is complicated, and the mining cost is increased; the most widely used membrane separation technology is electrodialysis, which is a combination of electrolysis and diffusion. It utilizes the selective permeability of ion exchange membrane, i.e. the anion membrane only allows cations to pass through in theory, and the cation membrane only allows anions to pass through in theory. Under the action of an external direct current electric field, the anions and cations move towards the anode and cathode respectively. If the fixed charge of the membrane is opposite to the charge of the ion, the ion can pass through. If their charges are the same, the ion is repelled, so fresh water can be prepared. SUMMARY

[0006] The purpose of the present application is to solve the problems in the prior art, and to provide a newly designed mine water treatment device.

[0007] The present application is realized by the following technical scheme:

[0008] A mine water treatment device comprises a pre-sedimentation tank and an electrochemical softening device.

[0009] A total water inlet pipe is arranged on the side wall of the pre-sedimentation tank, and a first peristaltic pump is arranged on the total water inlet pipe.

[0010] The electrochemical softening device comprises an insulating shell, and an inner cavity of the insulating shell is divided into four compartments by three vertical partitions.

[0011] Further, an electric conductivity monitor is arranged on the softening water inlet pipe and the softening water outlet pipe.

[0012] Further, a valve is arranged on the total water inlet pipe, the feeding pipe, the softening water inlet pipe and the softening water outlet pipe.

[0013] Further, the pre-sedimentation tank comprises a detachable tank body and a tank bottom, and the tank bottom is in the shape of an inverted triangle.

[0014] Further, the feeding tank is filled with aluminum chloride.

[0015] Further, the insulating shell comprises a detachable shell body and a shell bottom, and the shell bottom is provided with four semicircular chamber bottoms, which are the chamber bottoms of the first anode chamber, the first cathode chamber, the second anode chamber and the second cathode chamber, respectively.

[0016] Further, the anode and the cathode are both in the shape of a net, with a diameter of 1 m and a thickness of 5 cm.

[0017] Further, the overall size of the electrochemical softening device is 5 m in length, 1 m in width and 1 m in height.

[0018] Further, the mine water is deposited in the pre-sedimentation tank for 10 min.

[0019] Further, the mine water is softened in the electrochemical softening device for 10 min.

[0020] The device is scientific in design, reasonable in structure, simple in manufacturing, convenient in use and good in treatment effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings herein are used to provide further illustration of the present invention and constitute a part of this application. The illustrative embodiments of the present invention and their description are used to explain the present invention and do not constitute improper limitations on the present invention.

[0022] Figure 1 Schematic diagram of the structure of the device of the present invention.

[0023] Figure 2 Schematic diagram of the plan view of the anode and cathode electrodes in the device of the present invention.

[0024] In the figure: 1-pre-precipitation tank, 2-electrochemical softening device, 3-main water inlet pipe, 4-first peristaltic pump, 5-feeding tank, 6-sealing partition, 7-cation exchange membrane, 8-first anode chamber, 9-first cathode chamber, 10-second anode chamber, 11-second cathode chamber, 12-positive electrode, 13-negative electrode, 14-softening water inlet pipe, 15-second peristaltic pump, 16-softening water outlet pipe, 17-conductivity monitor. DETAILED DESCRIPTION

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only 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 making creative efforts are within the scope of protection of the present invention.

[0026] In the description of the present invention, it should be noted that the terms "left," "right," "upper," "lower," "bottom," and "top" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted" and "connected" should be understood in a broad sense. For example, "connected" can mean 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, and it can be internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0028] The embodiment provides a mine water treatment device, which comprises a pre-precipitation tank 1 and an electrochemical softening device 2. Figure 1 and Figure 2 As shown in the figure, the device comprises a pre-precipitation tank 1 and an electrochemical softening device 2.

[0029] A total water inlet pipe 3 is arranged on the side wall of the pre-precipitation tank 1, and a first peristaltic pump 4 is arranged on the total water inlet pipe 3; a feeding pipe is connected to the top of the pre-precipitation tank 1, and a feeding tank 5 is arranged on the top of the feeding pipe.

[0030] For the pre-precipitation tank 1, the pre-precipitation tank 1 comprises a detachably connected tank body and a tank bottom, the tank bottom is in the shape of an inverted triangle, compared with a flat tank bottom, the inverted triangle-shaped tank bottom is more conducive to the precipitation, collection and cleaning of large-particle impurities, and the sedimentation effect is better; when it is necessary to clean the precipitated impurities, the inverted triangle-shaped tank bottom can be opened for cleaning, which is convenient and fast. Aluminum chloride (PAC) is filled in the feeding tank 5, the aluminum chloride (PAC) is a coagulant, has strong interface adsorption capacity, can form surface precipitation under high concentration and high PH condition, and can be converted from polyaluminum to aluminum gel and then to aluminum hydroxide precipitation. Valves are arranged on the total water inlet pipe 3 and the feeding pipe, so that the control and adjustment are facilitated.

[0031] The electrochemical softening device 2 comprises an insulating shell, an inner cavity of the insulating shell is divided into four compartments by three vertical partitions, the upper part of each vertical partition is provided as a closed partition plate 6, and the lower part is provided as a cation exchange membrane 7, that is, only cations can pass through the lower part; the four compartments are sequentially a first anode chamber 8, a first cathode chamber 9, a second anode chamber 10 and a second cathode chamber 11 from left to right, the first anode chamber 8 and the second anode chamber 10 are both provided with an anode electrode 12, and the first cathode chamber 9 and the second cathode chamber 11 are both provided with a cathode electrode 13; the top of the first cathode chamber 9 and the second cathode chamber 11 is connected with a softened water inlet pipe 14, the other end of the softened water inlet pipe 14 is connected with the top of the pre-precipitation tank 1, and a second peristaltic pump 15 is arranged on the softened water inlet pipe 14; the top of the first anode chamber 8 and the second anode chamber 10 is connected with a softened water outlet pipe 16.

[0032] For the electrochemical softening device 2, the overall size is 5m in length, 1m in width and 1m in height. The insulating shell comprises a detachably connected shell body and a shell bottom, the shell bottom is provided with four semicircular chamber bottoms, and the four semicircular chamber bottoms are respectively the chamber bottom of the first anode chamber 8, the chamber bottom of the first cathode chamber 9, the chamber bottom of the second anode chamber 10 and the chamber bottom of the second cathode chamber 11; the chamber bottom of each electrode chamber is provided as a semicircular chamber bottom, which is more conducive to the precipitation, collection and cleaning of impurities, and the sedimentation effect is better; when it is necessary to clean the precipitated impurities, the shell bottom can be opened for cleaning, which is convenient and fast. The anode electrode 12 and the cathode electrode 13 both adopt ruthenium iridium titanium electrodes, are in the shape of a net, have a diameter of 1m and a thickness of 5cm. Valves are arranged on the softened water inlet pipe 14 and the softened water outlet pipe 16, so that the control and adjustment are facilitated.

[0033] The conductivity monitor 17 is arranged on the softened water inlet pipe 14 and the softened water outlet pipe 16, and the conductivity monitors 17 at the two places form a conductivity monitoring device, which can determine whether to flush the electrode by monitoring the conductivity of the mine water.

[0034] Further, according to the working principle of the mine water treatment device, the mine water first enters the pre-sedimentation tank 1 for sedimentation treatment, and the mine water is deposited in the pre-sedimentation tank 1 for 10 minutes, and the impurities are deposited on the inverted triangular tank bottom, and the upper clear liquid enters the electrochemical softening device 2 through the softened water inlet pipe 14 for softening treatment, and the mine water is softened in the electrochemical softening device 2 for 10 minutes, and the impurities in the pre-sedimentation tank 1 can be cleaned by opening the inverted triangular tank bottom. The water inlet and outlet mode of the mine water in the electrochemical softening device 2 is from top to bottom and then from bottom to top, which can solve two problems: one is to prolong the working time of the electrochemical softening device 2, because in the conventional electrochemical softening device 2, the OH - concentration near the cathode is the highest, which is easy to react with Ca 2+ , Mg 2+ and other ions in the water, and the precipitate is attached to the surface of the cathode, so the working time of the device is greatly reduced; the other is to reduce the unnecessary loss of OH - , because in the conventional electrochemical softening device 2, the OH - generated by the cathode is easy to react with H + generated by the anode, thereby causing unnecessary loss of OH - ; the present application effectively solves the above problems by changing the water inlet mode. The anode 12 and the cathode 13 in the electrochemical softening device 2 are isolated, which can improve the softening effect. The mine water is softened in the electrochemical softening device 2 for 10 minutes. The conductivity monitors 17 arranged on the softened water inlet pipe 14 and the softened water outlet pipe 16 form a conductivity monitoring device, which can test the conductivity of the solution, and the conductivity is determined by the ion concentration in the solution. When the scale adheres to the cathode 13 and seriously affects the treatment effect, the scale ions in the solution cannot be removed, which will cause the conductivity value to increase. When the conductivity value reaches a predetermined value, the switch is closed to stop the water inlet and start cleaning the electrode.

[0035] Further, the method for treating mine water by using the mine water treatment device comprises the following steps:

[0036] Step 1, pre-precipitation: the mine water is powered by the first peristaltic pump 4, through the total water inlet pipe 3 into the pre-precipitation tank 1, through the addition of aluminum chloride (PAC) in the top of the pre-precipitation tank 1 to make large particle impurities scale precipitation; after 10 minutes of precipitation, open the valve on the softened water inlet pipe 14, the upper clear liquid is powered by the second peristaltic pump 15, through the softened water inlet pipe 14 into the electrochemical softening device 2; the lower sediment enters the inverted triangular tank bottom, open the inverted triangular tank bottom to clean the sediment in it.

[0037] Step 2, electrochemical softening: the pre-precipitated mine water is divided into two parts and enters the first cathode chamber 9 and the second cathode chamber 11 of the electrochemical softening device 2; the pre-precipitated mine water passes through the negative electrode 13, the cation exchange membrane 7, the positive electrode 12, and then is discharged from the softened water outlet pipe 16 at the top of the first anode chamber 8 and the second anode chamber 10.

[0038] Step 3, monitoring: monitor whether the conductivity of the treated mine water reaches the predetermined value, if it is below the predetermined value, it can be successfully discharged; if the measured conductivity is greater than the predetermined value, close the valve on the softened water inlet pipe 14, clean the negative and positive electrodes 13, 12 and the bottom sediment.

[0039] It should be noted that the terms "comprising", "including" or any other variant thereof in this document are intended to cover non-exclusive inclusion, so that processes, methods, articles or devices including a series of elements not only include those elements, but also include other elements not explicitly listed, or also include elements inherent to such processes, methods, articles or devices. Without more limitations. The statement "including a limited element" does not exclude the presence of additional identical elements in the process, method, article or device including the element.

[0040] Although embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and alterations can be made thereto without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A mine water treatment device, characterized in that: Includes pre-precipitation tank and electrochemical softening device; A main water inlet pipe is provided on the side wall of the pre-precipitation tank, and a first peristaltic pump is provided on the main water inlet pipe; a feeding pipe is provided on the top of the pre-precipitation tank, and a feeding tank is provided on the top of the feeding pipe; The electrochemical softening device includes an insulating shell, the inner cavity of the insulating shell is divided into four compartments by three vertical partitions, the upper part of each vertical partition is set as a closed partition, and the lower part is set as a cation exchange membrane; the four compartments are, from left to right, the first anode chamber, the first cathode chamber, the second anode chamber, and the second cathode chamber, the first anode chamber and the second anode chamber are both provided with a positive electrode, and the first cathode chamber and the second cathode chamber are both provided with a negative electrode; the tops of the first cathode chamber and the second cathode chamber are both connected to a softening water inlet pipe, the other end of the softening water inlet pipe is connected to the top of the pre-precipitation tank, and a second peristaltic pump is provided on the softening water inlet pipe; the tops of the first anode chamber and the second anode chamber are both connected to a softening water outlet pipe.

2. The mine water treatment device according to claim 1, characterized in that: Conductivity monitors are installed on the softening water inlet pipe and the softening water outlet pipe.

3. The mine water treatment device according to claim 1, characterized in that: Valves are provided on the main water inlet pipe, feeding pipe, softening water inlet pipe and softening water outlet pipe.

4. The mine water treatment device according to claim 1, characterized in that: The pre-sedimentation tank comprises a detachably connected tank body and a tank bottom, and the tank bottom adopts an inverted triangle-shaped tank bottom.

5. The mine water treatment device according to claim 1, characterized in that: Aluminum chloride is added to the feeding tank.

6. The mine water treatment device according to claim 1, characterized in that: The insulating shell comprises a detachably connected shell body and a shell bottom. The shell bottom is provided with four semicircular chamber bottoms, which are the chamber bottoms of the first anode chamber, the first cathode chamber, the second anode chamber and the second cathode chamber respectively.

7. The mine water treatment device according to claim 1, characterized in that: Both the anode and cathode electrodes are ruthenium-iridium-titanium electrodes, which are mesh-shaped, 1m in diameter and 5cm in thickness.

8. The mine water treatment device according to claim 1, characterized in that: The overall dimensions of the electrochemical softening device are 5 m in length, 1 m in width and 1 m in height.

9. The mine water treatment device according to claim 1, characterized in that: The sedimentation time of mine water in the pre-sedimentation tank is 10 minutes.

10. The mine water treatment device according to claim 1, characterized in that: The time for softening mine water in the electrochemical softening device is 10 minutes.

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