Treatment system for mine water polluted by emulsion

Abstract

The utility model discloses a treatment system for mine water polluted by emulsion. The device comprises a regulating tank, a coagulative precipitation tank, a filter system, a sludge concentration tank, a primary dissolved air flotation system, a secondary dissolved air flotation system and a biochemical system, a water quality monitoring device and a PLC (programmable logic controller) are arranged on an output pipeline of the filter system, and a first branch pipeline is provided with a first valve; the second branch pipeline is provided with a second valve; the water quality monitoring device is connected with the PLC, and the first valve and the second valve are connected with the PLC; a water quality monitoring device and a PLC (Programmable Logic Controller) are arranged on an output pipeline of the primary dissolved air flotation system; a third valve is arranged on a third branch pipeline; the water quality monitoring device is connected with the PLC, the third valve and the fourth valve are connected with the PLC, the enriched liquid output pipelines of the two dissolved air flotation systems are connected with the solution collecting tank, and the biochemical system is connected with the solution collecting tank. The mine water purification device can effectively remove emulsified liquid while purifying mine water.

Description

Technical Field

[0001] The utility model relates to a wastewater treatment technology, in particular to a treatment system for mine water polluted by emulsion. Background Art

[0002] Emulsion consists of one or more liquids dispersed in another immiscible liquid in the form of particles, forming a multiphase dispersion system with considerable stability. The main components are base oil, emulsifier, additives such as antioxidants, emulsion stabilizers, oiliness agents, rust inhibitors, preservatives, etc. Emulsion wastewater is a widely-sourced industrial pollution source, and its damage to the environment is mainly manifested in its serious impact on the natural environment and ecosystem such as soil and water bodies.

[0003] In the process of coal mining, with the continuous development of mining machinery and equipment, the degree of automation of coal mining machinery is constantly improving, and a large amount of emulsions are put into use in mine production. These emulsions are easily mixed with mine water, thus forming emulsion-contaminated mine wastewater.

[0004] The treatment process of ordinary mine wastewater mainly includes coagulation, sedimentation, filtration, sterilization, deep treatment, resin treatment, etc. The COD removal rate is low and the emulsion removal effect is poor. These conventional treatment methods cannot effectively remove emulsions.

[0005] For example, the mine water treatment system with application publication number CN 104030493 A mainly purifies the mine water by adding coagulants and softeners to the mine water, removes suspended matter and hardness ion crystals, and then removes tiny suspended matter and colloidal substances by filtering. This method cannot effectively remove emulsions, and the removal effect of emulsions is poor, so it is not suitable for the treatment of mine wastewater contaminated by emulsions. For example, the mine water treatment system with authorization announcement number CN 211712819 U realizes the integration of flocculation, coagulation, sedimentation and filtration of mine water through a regulating tank, a neutralization aeration tank, a clarification filter, a disinfection discharge tank and a sludge tank, but it is not suitable for the treatment of mine wastewater contaminated by emulsions, and the removal effect of emulsions is poor, and the effective removal of emulsions cannot be achieved. Summary of the invention

[0006] The utility model aims to overcome the deficiencies of the prior art and proposes a treatment system for mine water contaminated by emulsion, which can effectively remove the emulsion while purifying the mine water and optimize the removal effect of the emulsion.

[0007] In order to achieve the above objectives, the utility model proposes the following technical solutions:

[0008] A treatment system for mine water polluted by emulsion comprises a regulating tank, a coagulation sedimentation tank, a filtering system, a sludge concentration tank, a primary dissolved air flotation system, a secondary dissolved air flotation system, a clear water tank, a solution collection tank and a biochemical system.

[0009] The coagulation sedimentation tank is connected to the regulating tank through a pipeline. The coagulation sedimentation tank is provided with a coagulant adding pipeline, a flocculant adding pipeline and a sludge output pipeline. The sludge output pipeline is connected to the sludge thickening tank. The filtration system is connected to the coagulation sedimentation tank through a pipeline.

[0010] The output pipeline of the filtering system is provided with a first water quality monitoring device and a first PLC controller, the output pipeline is connected with a first branch pipeline and a second branch pipeline, the first branch pipeline is a drainage pipeline, connected with a clean water tank, and the second branch pipeline is connected with a primary dissolved air flotation system; the first branch pipeline is provided with a first valve, and the second pipeline is provided with a second valve; the first water quality monitoring device is connected with an input end of the first PLC controller, and the first valve and the second valve are connected with an output end of the first PLC controller, the first water quality monitoring device performs real-time detection of the waste liquid water quality in the output pipeline of the filtering system, and sends the monitoring result to the first PLC controller in the form of an electrical signal, the first PLC controller analyzes the monitoring result, when various indicators of the waste liquid water quality meet the external discharge standard, the first valve is opened to discharge into the clean water tank for reuse or external discharge, when at least one of the various indicators of the waste liquid water quality is unqualified, the second valve is opened to enter the primary dissolved air flotation system for further treatment.

[0011] The primary dissolved air flotation system is provided with a primary enriched liquid output pipeline and a primary treatment output pipeline, the primary treatment output pipeline is provided with a second water quality monitoring device and a second PLC controller, the primary treatment output pipeline is connected with a third branch pipeline and a fourth branch pipeline, the third branch pipeline is provided with a third valve, connected with a clean water tank, the fourth branch pipeline is provided with a fourth valve, and connected with a secondary dissolved air flotation system, the second water quality monitoring device is connected with an input end of the second PLC controller, the third valve and the fourth valve are connected with an output end of the second PLC controller; the second water quality monitoring device performs real-time detection of the waste liquid water quality in the primary treatment output pipeline, and sends the monitoring result to the second PLC controller in the form of an electrical signal, the second PLC controller analyzes the monitoring result, and when various indicators of the waste liquid water quality meet the external discharge standard, the third valve is opened to discharge into the clean water tank for reuse or external discharge, and when at least one of the various indicators of the waste liquid water quality is unqualified, the fourth valve is opened to enter the secondary dissolved air flotation system for further treatment.

[0012] The secondary dissolved air flotation system is provided with a secondary enriched liquid output pipeline and a clear liquid output pipeline. The primary enriched liquid output pipeline and the secondary enriched liquid output pipeline merge into a solution collection pipeline and are connected to a solution collection tank, and the clear liquid output pipeline is connected to a clear water tank. The biochemical system is connected to the solution collection tank through a pipeline, and the biochemical system performs biochemical treatment on the enriched emulsion wastewater, removes soluble organic matter through microbial degradation, and achieves wastewater treatment water quality that meets the standard for reuse.

[0013] The biochemical system, dissolved air flotation system, water quality monitoring device, and PLC controller are already in the prior art and can be directly used by those skilled in the art.

[0014] The biochemical system may be a domestic water treatment system or other biochemical systems.

[0015] Preferably, the regulating tank is connected to an underground lifting pump through a pipeline, and the mine water contaminated by the emulsion is transported to the regulating tank through the underground lifting pump.

[0016] Preferably, a sludge dewatering machine is provided in the sludge thickening tank, and sludge removal is achieved by the sludge dewatering machine.

[0017] Preferably, the coagulation sedimentation tank is any one of a horizontal flow sedimentation tank, a radial flow sedimentation tank, a vertical flow sedimentation tank, and an inclined tube sedimentation tank.

[0018] Preferably, the filtration system is any one of a valve filter, a siphon filter, a V-type filter, a flap valve filter, and a pressure filter.

[0019] Preferably, the primary dissolved air flotation system and the secondary dissolved air flotation system are connected in series.

[0020] Preferably, the primary dissolved air flotation system and the secondary dissolved air flotation system have the same structure and function, both comprising a dissolved air device and an air flotation device. The dissolved air device adopts a partial dissolved air process or a reflux pressurized dissolved air method, and the air flotation device adopts a horizontal flow air flotation tank or a vertical flow air flotation tank.

[0021] Specifically, the mine water contaminated by emulsion is transported to the regulating tank through the underground lifting pump, and the water quality and quantity are appropriately adjusted. The mine water in the regulating tank is transported to the coagulation sedimentation tank through the lifting pump. After the coagulant and flocculant are added, the flocculation and sedimentation of the suspended particles in the mine water are achieved, and the solid-liquid separation is achieved in the coagulation sedimentation equipment. The large particles of solid are transferred to the sludge thickening tank, and the sludge is removed by the sludge dewatering machine. The upper liquid of the flocculation sedimentation tank is transported to the filtration system, and the fine flocs are further removed by deep filtration.

[0022] The first water quality monitoring device monitors the wastewater after being treated by the filtration system in real time, and sends the monitored water quality to the first PLC controller. The first PLC controller sends instructions to the first valve or the second valve according to the signal sent by the first water quality monitoring device. If the water quality monitoring result shows that various indicators of the wastewater meet the external discharge standard, the first valve on the first branch pipe is opened and the second valve on the second branch pipe is closed, so that the wastewater flows into the clean water tank for reuse or external discharge. If the water quality monitoring result shows that at least one of the wastewater indicators does not meet the external discharge standard, the first valve on the first branch pipe is closed, and the second valve on the second pipe is opened, and the wastewater enters the primary dissolved air flotation system for further treatment.

[0023] The wastewater overflows to the primary dissolved air flotation system by gravity, and the emulsion in the mine water is floated on the water surface by pressurized tiny bubbles, and then the scraper in the dissolved air flotation system is used to achieve the enrichment and separation of the emulsion, and the primary enriched emulsion is transported to the solution collection pool; the second water quality monitoring device monitors the primary treated clear liquid after the primary dissolved air flotation system in real time, and sends the monitored water quality to the second PLC controller, and the second PLC controller sends instructions to the third valve or the fourth valve according to the signal sent by the second water quality monitoring device. If the water quality monitoring result shows that the indicators of the clear liquid after the primary treatment meet the external discharge standard, the third valve on the third branch pipeline is opened and the fourth valve on the fourth branch pipeline is closed, so that the clear liquid after the primary treatment flows into the clear water pool for reuse or external discharge; if the water quality monitoring result shows that at least one of the indicators of the clear liquid wastewater after the primary treatment does not meet the external discharge standard, the third valve on the third branch pipeline is closed, and the fourth valve on the fourth branch pipeline is opened, and the clear liquid after the primary treatment enters the secondary dissolved air flotation system for further treatment.

[0024] The secondary dissolved air flotation system enriches and separates the emulsion of the primary treated clear liquid again to obtain secondary treated clear liquid and secondary enriched emulsion. The secondary treated clear liquid enters the clean water tank for reuse or discharge, and the secondary enriched emulsion is transported to the solution collection tank. The enriched emulsion in the solution collection tank enters the biochemical system for biochemical treatment, and soluble organic matter is removed through microbial degradation to achieve wastewater treatment water quality standards for reuse.

[0025] The beneficial effects of the utility model are:

[0026] The utility model forms a complete treatment system for mine water contaminated by emulsion through a coagulation sedimentation tank, a filtration system, a primary dissolved air flotation system, a secondary dissolved air flotation system, etc. Compared with ordinary mine water treatment systems, the utility model can better remove the emulsion in the mine water, greatly reduce COD, and thus optimize the mine water treatment effect.

[0027] The utility model detects the water quality of waste liquid by setting up a water quality monitoring device and a PLC controller. The PLC controller adjusts the flow direction of wastewater according to the water quality monitoring result, can adjust the treatment process according to the actual water quality situation, can accurately grasp the water quality situation, and then realize targeted and flexible treatment of mine water, controlling costs while ensuring treatment effects.

[0028] By adopting the above scheme, the utility model can effectively remove the emulsion while purifying the mine water, optimize the removal effect of the emulsion, and adjust the treatment process according to the actual water quality of the mine water, so as to accurately grasp the water quality, thereby realizing targeted and flexible treatment of the mine water, controlling costs while ensuring the treatment effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the utility model, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0030] Figure 1 It is an overall flow chart of the utility model.

[0031] In the figure, 1-regulating tank, 2-coagulation sedimentation tank, 3-filtration system, 4-sludge thickening tank, 5-primary dissolved air flotation system, 6-secondary dissolved air flotation system, 7-clear water tank, 8-solution collection tank, 9-biochemical system, 10-downhole lifting pump, 11-surpassing drainage pipe, 12-solution collection pipe, 21-coagulant addition pipe, 22-flocculant addition pipe, 31-first water quality monitoring device, 32-first valve, 33-second valve, 34-first PLC controller, 51-second water quality monitoring device, 52-third valve, 53-fourth valve, 54-second PLC controller. DETAILED DESCRIPTION

[0032] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0033] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0034] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and 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.

[0035] 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 one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0036] like Figure 1 As shown, a system for treating mine water contaminated by emulsion includes a regulating tank 1, a coagulation sedimentation tank 2, a filtration system 3, a sludge concentration tank 4, a primary dissolved air flotation system 5, a secondary dissolved air flotation system 6, a clear water tank 7, a solution collection tank 8 and a biochemical system 9.

[0037] The coagulation sedimentation tank 2 is connected to the regulating tank 1 through a pipeline. The coagulation sedimentation tank 2 is provided with a coagulant adding pipeline 21, a flocculant adding pipeline 22 and a sludge output pipeline. The sludge output pipeline is connected to the sludge thickening tank 4. The filtration system 3 is connected to the coagulation sedimentation tank 2 through a pipeline.

[0038] The output pipeline of the filtering system 3 is provided with a first water quality monitoring device 31 and a first PLC controller 34, and the output pipeline is connected to the first branch pipeline and the second branch pipeline. The first branch pipeline is a drainage pipeline connected to the clean water tank 7, and the second branch pipeline is connected to the primary dissolved air flotation system 5; the first branch pipeline is provided with a first valve 32, and the second branch pipeline is provided with a second valve 33; the first water quality monitoring device 31 is connected to the input end of the first PLC controller 34, and the first valve 32 and the second valve 33 are connected to the output end of the first PLC controller 34.

[0039] The primary dissolved air flotation system 5 is provided with a primary enrichment liquid output pipeline and a primary treatment output pipeline, the primary treatment output pipeline is provided with a second water quality monitoring device 51 and a second PLC controller 54, the primary treatment output pipeline is connected with a third branch pipeline and a fourth branch pipeline, the third branch pipeline is provided with a third valve 52, which is connected to the clean water tank 7, the fourth branch pipeline is provided with a fourth valve 53, and is connected to the secondary dissolved air flotation system 6, the second water quality monitoring device 51 is connected to the input end of the second PLC controller 54, and the third valve 52 and the fourth valve 53 are connected to the output end of the second PLC controller 54.

[0040] The secondary dissolved air flotation system 6 is provided with a secondary enriched liquid output pipeline and a clear liquid output pipeline. The primary enriched liquid output pipeline and the secondary enriched liquid output pipeline merge into a solution collection pipeline 12 and are connected to a solution collection tank 8. The clear liquid output pipeline is connected to a clear water tank 7. The biochemical system 9 is connected to the solution collection tank 8 through a pipeline. The biochemical system 9 performs biochemical treatment on the enriched emulsion wastewater, removes soluble organic matter through microbial degradation, and achieves wastewater treatment water quality that meets the standard for reuse.

[0041] This treatment system conducted three groups of experiments on mine water with different water quality conditions. The experimental data are as follows.

[0042]

[0043]

[0044]

[0045] In summary, the experimental object of Experiment 1 is mine water that has not been contaminated by emulsion, and the water quality is relatively good. As shown in Table 1, after coagulation, sedimentation and filtration, various indicators have reached Class III standards in the "Surface Water Environmental Quality Standards" and can be reused or discharged without subsequent treatment.

[0046] The experimental object of Experiment 2 was mine water seriously contaminated by emulsion, and various indicators seriously exceeded the standard. As shown in Table 2, the indicators of mine water did not meet the standard after only coagulation sedimentation and filtration. However, after coagulation sedimentation, filtration, primary dissolved air flotation and secondary dissolved air flotation treatment, various indicators of mine water have reached Class III standards in the "Surface Water Environmental Quality Standards" and can be reused or discharged.

[0047] The experimental object of Experiment 3 was mine water with moderate emulsion pollution. As shown in Table 3, after only coagulation sedimentation and filtration, the indicators of the mine water did not meet the standards; after coagulation sedimentation, filtration and primary dissolved air flotation, all indicators reached Class III standards in the "Surface Water Environmental Quality Standards" and could be reused or discharged.

[0048] Experiment 4 was conducted on the emulsion enriched in the solution collection pool, and the experimental data are as follows.

[0049]

[0050] As shown in Table 4, the water quality indicators of the enriched emulsion in the solution collection pool seriously exceeded the standard. It was added to the biochemical system at a ratio of 1:10. After biochemical treatment, all indicators evenly reached the Class V standard in the "Surface Water Environmental Quality Standard" and can be reused for road greening, ground dust removal and other recycled water sources.

[0051] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A treatment system for mine water contaminated by emulsion, comprising a regulating tank, a coagulation sedimentation tank, a filtration system, and a sludge thickening tank, wherein the regulating tank, the coagulation sedimentation tank, and the filtration system are connected in sequence through pipelines, the coagulation sedimentation tank is provided with a coagulant adding pipeline, a flocculant adding pipeline, and a sludge output pipeline, and the sludge output pipeline is connected to the sludge thickening tank; characterized in that: It also includes a primary dissolved air flotation system, a secondary dissolved air flotation system, a clean water tank, a solution collection tank and a biochemical system. The output pipeline of the filtration system is provided with a first water quality monitoring device and a first PLC controller. The output pipeline is connected to two pipelines. The first pipeline is provided with a first valve; the second pipeline is provided with a second valve, which is connected to the primary dissolved air flotation system; the first water quality monitoring device is connected to the input end of the first PLC controller, and the first valve and the second valve are connected to the output end of the first PLC controller; the primary dissolved air flotation system is provided with a primary enrichment liquid output pipeline and a primary treatment output pipeline, and the primary treatment output pipeline is provided with a second water quality monitoring device and a second PLC controller The primary treatment output pipeline is connected to the third branch pipeline and the fourth branch pipeline, and the third branch pipeline is provided with a third valve; the fourth branch pipeline is provided with a fourth valve, which is connected to the secondary dissolved air flotation system; the second water quality monitoring device is connected to the input end of the second PLC controller, and the third valve and the fourth valve are connected to the output end of the second PLC controller; the secondary dissolved air flotation system is provided with a secondary enriched liquid output pipeline and a clear liquid output pipeline, the primary enriched liquid output pipeline and the secondary enriched liquid output pipeline merge into the solution collection pipeline and are connected to the solution collection tank, and the clear water tank is respectively connected to the clear liquid output pipeline, the first branch pipeline, and the third branch pipeline; the biochemical system is connected to the solution collection tank through a pipeline.

2. A system for treating mine water contaminated by emulsion according to claim 1, characterized in that: A sludge dewatering machine is arranged in the sludge thickening tank.

3. A system for treating mine water contaminated by emulsion according to claim 1, characterized in that: The coagulation sedimentation tank is any one of a horizontal flow sedimentation tank, a radial flow sedimentation tank, a vertical flow sedimentation tank, and an inclined tube sedimentation tank.

4. A system for treating mine water contaminated by emulsion according to claim 1, characterized in that: The filtration system is any one of a valve filter, a siphon filter, a V-type filter, a flap valve filter, and a pressure filter.

5. A system for treating mine water contaminated by emulsion according to claim 1, characterized in that: The primary dissolved air flotation system and the secondary dissolved air flotation system are connected in series.

6. A system for treating mine water contaminated by emulsion according to claim 1, characterized in that: The primary dissolved air flotation system and the secondary dissolved air flotation system have the same structure and function, both of which include a dissolved air device and an air flotation device. The dissolved air device adopts a partial dissolved air process or a reflux pressurized dissolved air method, and the air flotation device adopts a horizontal flow air flotation tank or a vertical flow air flotation tank.

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