Mine water treatment device

Abstract

The utility model provides a mine water treatment device which comprises a coagulative precipitation tank, a filter tank, an ultrafiltration tank, a water producing tank, a regulating tank and a PLC (programmable logic controller), a water inlet of the coagulative precipitation tank is connected with a mine water supply pipeline, a water outlet of the coagulative precipitation tank is connected with a water inlet of the filter tank, and the water outlet of the filter tank is connected with the upper part of the ultrafiltration tank sequentially through a water inlet pump and a water inlet valve; a liquid level meter is arranged on one side in the ultrafiltration tank, a ceramic membrane is arranged in the ultrafiltration tank, the ceramic membrane is connected with a water producing tank through a water producing valve and a water producing pump in sequence, the bottom of the ultrafiltration tank is connected with the regulating tank through a blow-down valve, the input end of the PLC is electrically connected with the liquid level meter, and the output end of the PLC is electrically connected with the water inlet pump, the water inlet valve, the water producing valve, the water producing pump and the blow-down valve respectively. According to the mine water treatment device disclosed by the utility model, the whole water treatment process is automatically controlled by the PLC, so that the labor cost is saved, and the water treatment efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the field of mine water treatment technology, and in particular relates to a mine water treatment device. Background Technology

[0002] Mine water refers to wastewater generated during mining operations due to the contact and infiltration of groundwater with coal and rock strata, as well as physical, chemical, and biochemical reactions between groundwater and minerals in the strata caused by human mining activities. Mine water contains a large amount of fine particulate matter, which is small in size, light in density, and highly concentrated. It also contains organic pollutants such as waste engine oil, emulsified oil, heavy metals, and mineral salts. Direct discharge would cause serious pollution to the environment and surrounding water bodies. To treat and utilize mine water and avoid water waste, it needs to undergo multiple filtration treatments before use. Currently, coagulation and sedimentation processes are mainly used for mine water treatment. However, the slow settling speed of particulate matter and poor coagulation effect make it difficult to achieve the treatment goals through conventional coagulation and sedimentation processes. Chinese invention patent application CN 111410269 A discloses an ultrafiltration system for deep treatment of mine water in coal mines, including an intermediate water tank, an ultrafiltration membrane tank, an equalization tank, a product water tank, and a dewatering tank. The ultrafiltration membrane tank is connected to the intermediate water tank via an inlet valve and an inlet pump, to the product water tank via a backwash valve and a backwash pump, and to the dewatering tank via a product water valve and a product water pump. The equalization tank is connected to the ultrafiltration membrane tank via a drain valve located at the bottom side of the ultrafiltration membrane tank. This device requires manual operation of the pumps and valves, resulting in high labor costs, a high risk of error, and low efficiency. Summary of the Invention

[0003] The technical problem solved by this invention is the high labor cost of existing mine water treatment devices.

[0004] This utility model provides a mine water treatment device, including a coagulation sedimentation tank, a filtration tank, an ultrafiltration tank, a product water tank, a regulating tank, and a PLC controller.

[0005] The inlet of the coagulation sedimentation tank is connected to the mine water supply pipeline, and the outlet of the coagulation sedimentation tank is connected to the inlet of the filtration tank. The outlet of the filtration tank is connected to the upper part of the ultrafiltration tank via an inlet pump and an inlet valve. The upper part of the ultrafiltration tank is connected to the equalization tank via an overflow pipe. A level gauge is installed on one side of the ultrafiltration tank, and a ceramic membrane is installed inside the ultrafiltration tank. The ceramic membrane is connected to the product water tank via a product water valve and a product water pump. The bottom of the ultrafiltration tank is connected to the equalization tank via a drain valve.

[0006] The input terminal of the PLC controller is electrically connected to the level gauge, and the output terminal of the PLC controller is electrically connected to the inlet pump, inlet valve, product water valve, product water pump, and drain valve, respectively.

[0007] The water production tank is connected to the ceramic membrane in sequence via a backwash pump and a backwash valve. The bottom of the ultrafiltration tank is equipped with an aeration pipeline, which is connected to an aeration fan via an air inlet valve. The backwash pump, backwash valve, and air inlet valve are connected to the output terminal of the PLC controller.

[0008] The PLC controller controls the inlet pump and inlet valve to open, allowing mine water to flow into the ultrafiltration tank through the coagulation sedimentation tank and the filtration tank. When the level gauge detects that the ultrafiltration tank level reaches the operating level of the product water pump, the PLC controller controls the product water valve and product water pump to open, drawing water from the ultrafiltration tank into the ceramic membrane to begin water production. When the level gauge detects that the ultrafiltration tank level reaches the high level, the PLC controller controls the product water pump and product water valve to close. Simultaneously, the PLC controller controls the drain valve to open, discharging wastewater from the ultrafiltration tank into the equalization tank. When wastewater discharge is complete, the PLC controller controls the drain valve to close.

[0009] The PLC controller is used to set the membrane flux threshold. When the ceramic membrane flux is lower than the threshold, the PLC controller controls the backwash valve, backwash pump and air inlet valve to open and perform reverse cleaning on the ceramic membrane.

[0010] The PLC controller is used to set the running time of the product water pump. When the product water pump reaches the running time, the PLC controller controls the backwash valve, backwash pump and air inlet valve to open and perform reverse cleaning of the ceramic membrane.

[0011] The filter tank is one or a combination of several of the following: activated carbon filter tank, multi-media filter tank, quartz sand filter tank, and valveless filter tank.

[0012] The present invention has the following beneficial effects: The mine water treatment device of the present invention performs preliminary filtration treatment on mine water through flocculation sedimentation tank and filtration tank. The filtered mine water enters ultrafiltration tank for deep treatment. During the operation of ultrafiltration tank, the ceramic membrane can also be backwashed to keep the membrane flux of ceramic membrane at its optimal working state. The whole process is automatically controlled by PLC controller, which saves labor costs and improves water treatment efficiency. Attached Figure Description

[0013] Figure 1 Schematic diagram of the mine water treatment device of this utility model. Detailed Implementation

[0014] To clearly illustrate the technical features of this solution, specific embodiments are described below in conjunction with the accompanying drawings. Obviously, the described embodiments are merely some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort should fall within the protection scope of this utility model.

[0015] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0016] like Figure 1 As shown, a mine water treatment device includes a coagulation sedimentation tank 1, a filtration tank 2, an ultrafiltration tank 3, a product water tank 6, an equalization tank 7, and a PLC controller.

[0017] The inlet of the coagulation sedimentation tank 1 is connected to the mine water supply pipeline, and the outlet of the coagulation sedimentation tank 1 is connected to the inlet of the filter tank 2. The outlet of the filter tank 2 is connected to the upper part of the ultrafiltration tank 3 via the inlet pump 8 and the inlet valve 9. In this embodiment, the filter tank 2 is one or a combination of activated carbon filter, multi-media filter, quartz sand filter, and valveless filter. The upper part of the ultrafiltration tank 3 is connected to the regulating tank 7 via an overflow pipe. A level gauge 16 is installed on one side of the ultrafiltration tank 3. A ceramic membrane 4 is installed inside the ultrafiltration tank 3. The ceramic membrane 4 is connected to the product water valve. 10 and product water pump 11 are connected to product water tank 6. Product water tank 6 is connected to ceramic membrane 4 via backwash valve 13 and backwash pump 12 in sequence. Aeration pipeline 5 is provided at the bottom of ultrafiltration tank 3. Aeration pipeline 5 is connected to aeration blower via air inlet valve 14. The bottom of ultrafiltration tank 3 is connected to regulating tank 7 via drain valve 15. The input terminal of PLC controller is electrically connected to level gauge 16. The output terminal of PLC controller is electrically connected to water inlet pump 8, water inlet valve 9, product water valve 10, product water pump 11, backwash valve 13, backwash pump 12, air inlet valve 14, and drain valve 15 respectively.

[0018] The PLC controller controls the inlet pump 8 and inlet valve 9 to open, and the mine water flows into the ultrafiltration tank 3 through the coagulation sedimentation tank 1 and the filter tank 2. When the level gauge 16 detects that the liquid level in the ultrafiltration tank 3 reaches the operating level of the product water pump 11, the PLC controller controls the product water valve 10 and product water pump 11 to open, so that the water in the ultrafiltration tank is sucked into the ceramic membrane 4 to start water production. When the level gauge 16 detects that the liquid level in the ultrafiltration tank 3 reaches the high level, the PLC controller controls the product water valve 10 and product water pump 11 to close.

[0019] In this embodiment, the backwashing ceramic membrane 4 has two control conditions. One is to set a critical value for membrane flux through a PLC controller. In this embodiment, the critical value is 40 m³ / s. 3When the flux of ceramic membrane 4 falls below a critical value, the PLC controller opens backwash valve 13, backwash pump 12, and air inlet valve 14 to perform reverse cleaning of ceramic membrane 4. Alternatively, the PLC controller sets the operating time of permeate pump 11. When permeate pump 11 reaches its operating time (in this embodiment, the operating time is 1 hour or 2 hours), the PLC controller opens backwash valve 13, backwash pump 12, and air inlet valve 14 to perform reverse cleaning of the ceramic membrane. After backwashing, the PLC controller opens drain valve 15 to discharge wastewater from ultrafiltration tank 3 into equalization tank 7. When wastewater discharge is complete, the PLC controller closes drain valve 15 and opens inlet valve 9 and inlet pump 8 to begin the second round of water production. The entire water treatment process of this invention is automatically controlled by a PLC controller, saving labor costs and improving water treatment efficiency. The effluent quality meets the Class III standard for surface water environmental quality.

[0020] All other parts of this utility model that are not described in detail belong to the prior art, and therefore will not be described in detail here.

[0021] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.

Claims

1. A mine water treatment apparatus, characterised in that, The device comprises a coagulation sedimentation tank, a filter tank, an ultrafiltration tank, a water production tank, an adjusting tank and a PLC controller, The water inlet of the coagulation sedimentation tank is connected with a mine water supply pipeline, the water outlet of the coagulation sedimentation tank is connected with the water inlet of the filter tank, the water outlet of the filter tank is connected with the upper part of the ultrafiltration tank through a water inlet pump and a water inlet valve in sequence, the upper part of the ultrafiltration tank is connected with the adjusting tank through an overflow pipeline, one side of the ultrafiltration tank is provided with a liquid level meter, the ultrafiltration tank is provided with a ceramic membrane, the ceramic membrane is connected with the water production tank through a water production valve and a water production pump in sequence, and the bottom of the ultrafiltration tank is connected with the adjusting tank through a blowdown valve. The input end of the PLC controller is electrically connected with the liquid level meter, and the output end of the PLC controller is electrically connected with the water inlet pump, the water inlet valve, the water production valve, the water production pump and the blowdown valve.

2. The mine water treatment apparatus of claim 1, wherein, The water production tank is connected with the ceramic membrane through a backwashing pump and a backwashing valve in sequence, the bottom of the ultrafiltration tank is provided with an aeration pipeline, the aeration pipeline is connected with an aeration fan through an air inlet valve, and the backwashing pump, the backwashing valve and the air inlet valve are connected with the output end of the PLC controller.

3. The mine water treatment apparatus of claim 1, wherein, The PLC controller controls the water inlet pump and the water inlet valve to be opened, and the mine water flows into the ultrafiltration tank through the coagulation sedimentation tank and the filter tank, when the liquid level of the ultrafiltration tank reaches the running liquid level of the water production pump, the PLC controller controls the water production valve and the water production pump to be opened, the water in the ultrafiltration tank is sucked into the ceramic membrane to start water production, when the liquid level of the ultrafiltration tank reaches a high liquid level, the PLC controller controls the water production pump and the water production valve to be closed, and simultaneously controls the blowdown valve to be opened, so that the sewage in the ultrafiltration tank is discharged into the adjusting tank, and when the sewage discharge is completed, the PLC controller controls the blowdown valve to be closed.

4. The mine water treatment apparatus of claim 2, wherein, The PLC controller is used for setting a membrane flux critical value, when the membrane flux of the ceramic membrane is lower than the critical value, the PLC controller controls the backwashing valve, the backwashing pump and the air inlet valve to be opened, so that the ceramic membrane is backwashed.

5. The mine water treatment apparatus of claim 2, wherein, The PLC controller is used for setting a water production pump running time, when the water production pump reaches the running time, the PLC controller controls the backwashing valve, the backwashing pump and the air inlet valve to be opened, so that the ceramic membrane is backwashed.

6. The mine water treatment apparatus of claim 1, wherein, The filter tank is one or a combination of the following filter tanks: an activated carbon filter tank, a multi-medium filter tank, a quartz sand filter tank and a valveless filter tank.

Images