Mine reclaimed water reuse treatment system

Abstract

The utility model provides a mine reclaimed water reuse treatment system, which relates to the technical field of wastewater treatment, and comprises a pretreatment unit, a precipitation unit, a primary filtration and disinfection unit, a reclaimed water storage unit, a secondary filtration and disinfection unit, a clear water storage unit and a sludge treatment unit, according to the utility model, suspended particles in mine wastewater are gradually removed through the pretreatment unit and the precipitation unit, and then the primary filtration and disinfection unit and the secondary filtration and disinfection unit are used for treating water in sequence, so that reclaimed water which can be used for spray dust fall and pipeline flushing is obtained, and clear water which can meet production and living requirements is obtained; the water quality safety and cleanliness are effectively guaranteed, water resources are reasonably utilized, fresh water consumption is reduced, the diversified water use requirements of the mine are met, and the comprehensive utilization efficiency of the water resources is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wastewater treatment, in particular to a mine water reuse treatment system. BACKGROUND

[0002] In mine operation, a large amount of wastewater is generated. In order to make the wastewater meet the reusable standard, reduce the dependence on fresh water resources, alleviate the situation of water resource shortage to a certain extent, and reduce the water cost, the wastewater needs to be treated.

[0003] However, the water quality of the treated mine water in the prior design does not meet the requirements of other potential reuse methods, the use range of the mine water is small, and the mine water is only partially used for daily spraying, watering and yellow mud grouting pipeline flushing of the return air channel and return air roadway, and the recycling rate is low. SUMMARY

[0004] The purpose of the embodiment of the present application is to provide a mine water reuse treatment system, which can solve the technical problems that the water quality of the treated mine water in the prior design does not meet the requirements of other potential reuse methods, the use range of the mine water is small, and the recycling rate is low.

[0005] The embodiment of the present application provides a mine water reuse treatment system, which comprises:

[0006] A pretreatment unit, which is used for preliminary sedimentation treatment of mine wastewater;

[0007] A sedimentation unit, which is used for further sedimentation of the mine wastewater treated by the pretreatment unit;

[0008] A primary filtration and disinfection unit, which is used for filtering and disinfecting the mine wastewater treated by the sedimentation unit to obtain reclaimed water;

[0009] A reclaimed water storage unit, which is used for storing and transferring the reclaimed water, and can output the reclaimed water for mine spraying dust suppression and yellow mud grouting pipeline flushing;

[0010] A secondary filtration and disinfection unit, which is used for deep filtration and disinfection of the reclaimed water transferred by the reclaimed water storage unit to obtain clean water;

[0011] A clean water storage unit, which is used for storing and transferring the reclaimed water, and can output the reclaimed water as production and living water;

[0012] A sludge treatment unit, which is used for pressure filtration and external transportation of the sludge of the pretreatment unit and the sedimentation unit.

[0013] Further, the pre-treatment unit is a pre-sedimentation adjusting tank, and large-particle impurities are naturally settled through pre-sedimentation.

[0014] Further, the sedimentation unit comprises a mechanical flocculation tank and a horizontal flow sedimentation tank arranged in sequence, flocculants are added into water in the mechanical flocculation tank, flocs are formed under stirring, and the water after flocculation enters the horizontal flow sedimentation tank for sedimentation.

[0015] Further, the primary filtration and disinfection unit comprises a quartz sand filter, a biological filter tank and a first disinfection device arranged in sequence, the supernatant of the horizontal flow sedimentation tank enters the quartz sand filter, residual small particles and suspended solids in the water are removed, then the water flows into the biological filter tank to remove organic matter and ammonia nitrogen pollutants in the mine water, and the water is subjected to disinfection treatment by the first disinfection device before flowing into the reclaimed water storage unit.

[0016] Further, the reclaimed water storage unit comprises an intermediate water tank and a reclaimed water tank, the intermediate water tank is used for storing water after being treated by the first disinfection device, and the reclaimed water tank is used for storing part of water in the intermediate water tank.

[0017] Further, the secondary filtration and disinfection unit comprises a self-cleaning filter, an ultrafiltration unit and a second disinfection device arranged in sequence, the self-cleaning filter is used for filtering water transferred from the intermediate water tank, water after being filtered by the self-cleaning filter flows into the ultrafiltration unit, the ultrafiltration unit further filters through the screening action of an ultrafiltration membrane, and water after being filtered by the ultrafiltration unit is subjected to disinfection treatment by the second disinfection device before flowing into the clean water storage unit.

[0018] Further, the clean water storage unit comprises a water production tank and a clean water tank, the water production tank is used for collecting water after being treated by the second disinfection device, and the clean water tank is used for storing part of water in the water production tank, and water in the clean water tank can be distributed according to water demand through a pipeline delivery system.

[0019] Further, the sludge treatment unit comprises a sludge concentration tank, a plate-and-frame filter press and a sludge cake delivery device arranged in sequence, the sludge concentration tank is used for collecting and concentrating sludge generated by the pre-sedimentation adjusting tank and the horizontal flow sedimentation tank, sludge after being concentrated by the sludge concentration tank enters the plate-and-frame filter press, water in the sludge is squeezed out through the pressure action of the plate-and-frame filter press, so that the sludge forms a solid sludge cake, and the sludge cake after being treated by the plate-and-frame filter press is delivered to a designated place by the sludge cake delivery device for disposal.

[0020] The utility model discloses beneficial effects:

[0021] The utility model discloses a pretreatment unit and the gradual removal of suspended particles in mine wastewater in sedimentation unit, the water is handled in turn from the water that can be used to spray dust, pipeline flushing to the clear water that can satisfy production requirement by the first filtering disinfection unit and the second filtering disinfection unit of latter, effectively guarantee water quality safety and cleanliness, rationally utilize water resources, reduce fresh water consumption, satisfy the diversified water demand of mine, improve water resource comprehensive utilization efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments, it should be understood that the following drawings only show some embodiments of the present application, therefore should not be regarded as the limitation to the scope, for ordinary skilled person in the art, on the premise of not paying the creative labor, can also obtain other related drawings according to these drawings.

[0023] Figure 1 The mine water reuse treatment system process flow diagram in some embodiments of the present application;

[0024] The reference signs are respectively:

[0025] 1, pretreatment unit;11, pre-sedimentation conditioning tank;2, sedimentation unit;21, mechanical flocculation tank;22, horizontal flow sedimentation tank;3, first filtering disinfection unit;31, quartz sand filter;32, biological filter tank;33, first disinfection device;4, reclaimed water storage unit;41, intermediate water tank;42, reuse water tank;5, second filtering disinfection unit;51, self-cleaning filter;52, ultrafiltration unit;53, second disinfection device;6, clear water storage unit;61, water production tank;62, clear water tank;7, sludge treatment unit;71, sludge concentration tank;72, plate and frame filter press;73, mud cake external transport equipment. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme and advantage of the embodiments of the present application more clear, the following will combine the drawings in the embodiments of the present application, and the technical scheme in the embodiments of the present application is described clearly and completely, obviously, the described embodiments are some embodiments of the present application, not all embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary skilled person in the art without making creative labor belong to the scope of the present application.

[0028] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0029] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application and simplifying the description, 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, and therefore should not be construed as a limitation on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0030] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0031] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. Specific implementation examples:

[0033] like Figure 1As shown, the present application provides a mine water reuse treatment system, which comprises a pretreatment unit 1, a sedimentation unit 2, a primary filtration and disinfection unit 3, a reclaimed water storage unit 4, a secondary filtration and disinfection unit 5, a clean water storage unit 6 and a sludge treatment unit 7. The pretreatment unit 1 is used for preliminary sedimentation treatment of mine wastewater. The sedimentation unit 2 is used for further sedimentation of mine wastewater treated by the pretreatment unit 1. The primary filtration and disinfection unit 3 is used for filtration and disinfection of mine wastewater treated by the sedimentation unit 2, to obtain reclaimed water. The reclaimed water storage unit 4 is used for storage and transfer of reclaimed water, and can output reclaimed water for mine spray dust suppression, yellow mud grouting pipeline flushing. The secondary filtration and disinfection unit 5 is used for deep filtration and disinfection of reclaimed water transferred from the reclaimed water storage unit 4, to obtain clean water. The reclaimed water storage unit 4 is used for storage and transfer of reclaimed water, and can output reclaimed water as production water. The sludge treatment unit 7 is used for pressure filtration and external transport of sludge from the pretreatment unit 1 and the sedimentation unit 2. Suspended particles in mine wastewater are gradually removed by the pretreatment unit 1 and the sedimentation unit 2. The primary filtration and disinfection unit 3 and the secondary filtration and disinfection unit 5 in turn treat the water, from reclaimed water that can be used for spray dust suppression and pipeline flushing, to clean water that meets production requirements, effectively ensuring water quality safety and cleanliness, reasonably utilizing water resources, reducing fresh water consumption, meeting the diversified water demand of the mine, and improving the comprehensive utilization efficiency of water resources.

[0034] As shown in Figure 1 , the pretreatment unit 1 is a pre-sedimentation conditioning tank 11. Large particle impurities are naturally settled by pre-sedimentation, and are naturally settled to the bottom of the tank, reducing the burden on subsequent treatment units. At the same time, the pre-sedimentation conditioning tank 11 also plays a role in adjusting water quantity and water quality. The flow rate and water quality of mine water may fluctuate due to factors such as mining progress and drainage time of the mine. The pre-sedimentation conditioning tank 11 can buffer these changes, allowing the subsequent treatment units to operate under relatively stable water inflow conditions, ensuring the stability of the entire treatment system.

[0035] As shown in Figure 1 , the sedimentation unit 2 comprises a mechanical flocculation tank 21 and a horizontal flow sedimentation tank 22 arranged in sequence. In the mechanical flocculation tank 21, a flocculant is added to the water, and under the action of stirring, flocculation is formed. The water after flocculation enters the horizontal flow sedimentation tank 22 for sedimentation. Due to the slow flow rate of the horizontal flow sedimentation tank 22, the previously formed flocculation is settled to the bottom of the tank under the action of gravity. The horizontal flow sedimentation tank 22 can effectively separate suspended solids in the water, further improving the water quality of the supernatant, and reducing the suspended solids content in the water, providing water with relatively good water quality for subsequent filtration and other deep treatment processes.

[0036] As shown in Figure 1As shown, the primary filtration and disinfection unit 3 comprises a quartz sand filter 31, a biological filter 32 and a first disinfection device 33 arranged in sequence. The supernatant of the horizontal flow sedimentation tank 22 enters the quartz sand filter 31 to remove the residual fine particles and suspended solids in the water, and then flows into the biological filter 32 to remove the organic matter and ammonia-nitrogen pollutants in the mine water. The water is disinfected by the first disinfection device 33 before flowing into the reclaimed water storage unit 4. The filter layer of the quartz sand filter 31 can intercept the tiny impurities that have not been completely precipitated in the sedimentation tank, significantly reducing the turbidity of the water, and also removing part of the bacteria and algae and other microorganisms in the water, further purifying the water quality. The biological filter 32 contains a large number of microorganisms that adhere to the surface of the filter material. When the mine water passes through the biological filter 32, the microorganisms will decompose the organic matter in the water and convert it into harmless substances such as carbon dioxide and water. At the same time, the microorganisms will also perform nitrification and denitrification on the ammonia-nitrogen, reducing the ammonia-nitrogen content in the water and improving the chemical oxygen demand (COD) and biochemical oxygen demand (BOD) and other indicators of the water quality.

[0037] As shown in Figure 1 The reclaimed water storage unit 4 comprises an intermediate water tank 41 and a reclaimed water pool 42. The intermediate water tank 41 is used to store the water treated by the first disinfection device 33, and the reclaimed water pool 42 is used to store part of the water in the intermediate water tank 41. The intermediate water tank 41 serves as a buffer and adjusts the water volume. In the event of a failure in the subsequent treatment unit or a change in water demand, it can temporarily store a certain amount of water to ensure the continuity and stability of the entire treatment system. The water in the reclaimed water pool 42 meets certain reuse standards and can be used for mine spray dust suppression, yellow mud grouting pipeline flushing and other links.

[0038] As shown in Figure 1 The secondary filtration and disinfection unit 5 comprises a self-cleaning filter 51, an ultrafiltration unit 52 and a second disinfection device 53 arranged in sequence. The self-cleaning filter 51 is used to filter the water transferred from the intermediate water tank 41. The water filtered by the self-cleaning filter 51 flows into the ultrafiltration unit 52, which further filters through the screening action of the ultrafiltration membrane. The water filtered by the ultrafiltration unit 52 is disinfected by the second disinfection device 53 before flowing into the clean water storage unit 6. The self-cleaning filter 51 is a filtering device that can automatically remove impurities on the filter screen. During the reuse of mine water, it can further remove the fine particles that may remain in the water, prevent the accumulation of these particles in the reuse system, and prevent pipe blockage or damage to equipment. In this embodiment, the self-cleaning filter 51 is a brush-type self-cleaning filter 51, and the ultrafiltration unit 52 is a tubular ultrafiltration unit 52, both of which are prior art and will not be described in detail here.

[0039] As shown in Figure 1As shown, the clean water storage unit 6 includes a water production tank 61 and a clean water pool 62. The water production tank 61 is used to collect water that has been treated by the second disinfection device 53, and the clean water pool 62 is used to store part of the water in the water production tank 61. The water in the clean water pool 62 can be distributed according to water demand through a pipeline transportation system, thereby expanding the scope of water utilization.

[0040] like Figure 1 As shown, the sludge treatment unit 7 includes a sludge thickening tank 71, a plate and frame filter press 72, and a sludge cake transportation device 73 arranged in sequence. The sludge thickening tank 71 is used to collect and thicken the sludge generated by the pre-sedimentation and equalization tank 11 and the horizontal sedimentation tank 22. The sludge thickened by the sludge thickening tank 71 enters the plate and frame filter press 72. The pressure of the plate and frame filter press 72 squeezes out the water from the sludge, making the sludge form a solid sludge cake. The sludge cake processed by the plate and frame filter press 72 is transported by the sludge cake transportation device 73 to a designated location for disposal. The sludge is filtered and transported for treatment, such as landfill, incineration, or use for other purposes such as building materials, to avoid secondary pollution of the environment by the sludge.

[0041] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A mine water reuse treatment system, characterized by, The application relates to a mine water treatment device. The device comprises a pre-treatment unit for primary precipitation treatment of mine water, a precipitation unit for further precipitation of the mine water treated by the pre-treatment unit, a primary filtration and disinfection unit for filtration and disinfection of the mine water treated by the precipitation unit to obtain reclaimed water, a reclaimed water storage unit for storage and transfer of the reclaimed water and output of the reclaimed water for mine spray dust reduction and yellow mud grouting pipeline flushing, a secondary filtration and disinfection unit for deep filtration and disinfection of the reclaimed water transferred by the reclaimed water storage unit to obtain clean water, and a clean water storage unit for storage and transfer of the reclaimed water and output of the reclaimed water as production and living water. The pre-treatment unit is a pre-sedimentation conditioning tank, and large-particle impurities are naturally settled through pre-sedimentation. The precipitation unit comprises a mechanical flocculation tank and a horizontal flow sedimentation tank arranged in sequence, flocculants are added into water in the mechanical flocculation tank, and flocculation bodies are formed under stirring, and water after flocculation enters the horizontal flow sedimentation tank for sedimentation. The primary filtration and disinfection unit comprises a quartz sand filter, a biological filter tank and a first disinfection device arranged in sequence, supernatant of the horizontal flow sedimentation tank enters the quartz sand filter to remove residual small particles and suspended matters in water, then flows into the biological filter tank to remove organic matters and ammonia nitrogen pollutants in mine water, and the water is subjected to disinfection treatment by the first disinfection device before flowing into the reclaimed water storage unit. The reclaimed water storage unit comprises an intermediate water tank and a reclaimed water pool, the intermediate water tank is used for storing water treated by the first disinfection device, and the reclaimed water pool is used for storing part of water of the intermediate water tank. The secondary filtration and disinfection unit comprises a self-cleaning filter, an ultrafiltration unit and a second disinfection device arranged in sequence, the self-cleaning filter is used for filtering water transferred from the intermediate water tank, water filtered by the self-cleaning filter flows into the ultrafiltration unit, the ultrafiltration unit further filters through the screening action of an ultrafiltration membrane, and water filtered by the ultrafiltration unit is subjected to disinfection treatment by the second disinfection device before flowing into the clean water storage unit. The clean water storage unit comprises a water production tank and a clean water pool, the water production tank is used for collecting water treated by the second disinfection device, the clean water pool is used for storing part of water of the water production tank, and water in the clean water pool can be distributed according to water demand through a pipeline delivery system.

2. A mine water reclamation treatment system according to claim 1 wherein: ​ 3. A mine water re-use treatment system according to claim 2, characterised in that: ​ 4. A mine water re-use treatment system according to claim 3, characterised in that: ​ 5. A mine water re-use treatment system according to claim 4, characterised in that: ​ 6. A mine water re-use treatment system according to claim 5, characterised in that: ​ 7. A mine water re-use treatment system according to claim 6, characterised in that: ​ 8. A mine water reuse treatment system as claimed in claim 3, characterised in that: The sludge treatment unit comprises a sludge concentration tank, a plate-and-frame filter press and a sludge cake conveying device arranged in sequence, the sludge concentration tank is used for collecting and concentrating the sludge generated by the pre-sedimentation adjusting tank and the horizontal flow sedimentation tank, the sludge concentrated by the sludge concentration tank enters the plate-and-frame filter press, the water in the sludge is squeezed out by the pressure action of the plate-and-frame filter press, so that the sludge forms a solid sludge cake, and the sludge cake treated by the plate-and-frame filter press is conveyed to a designated place for disposal by the sludge cake conveying device.

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