Treatment system for removing emulsion in mine water
By combining the adjustment tank, coagulation sediment tank and inorganic flat membrane filtration system, the combination of aeration and backwashing devices is used to solve the problems of low removal efficiency and secondary pollution in mine water, and efficient purification and long-term stability are achieved Running mine water treatment.
Patent Information
- Application Number
- CN202420890536.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-26
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-04-26
AI Technical Summary
The existing mine water treatment system cannot effectively remove emulsion, resulting in environmental pollution, and conventional methods have problems with low removal efficiency and secondary pollution.
Using a processing system including a regulating tank, a coagulation sediment tank, an inorganic flat membrane filtration system, an aeration device and a backwash device, the emulsion is removed by a combination of coagulation sedimentation and inorganic flat membrane filtration, and the aeration and backwash device are used to improve the emulsion. Removal effect and membrane life.
It realizes efficient removal of emulsions in mine water, reduces chemical oxygen demand (COD), extends the service life of ceramic flat films, reduces chemical cleaning frequency and secondary pollution, and ensures the continuous operation and environmental performance of the system.
Smart Images
Figure CN222250321U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of mine water treatment, in particular to a treatment system for removing emulsion in mine water. 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. A large amount of emulsions are put into use in mine production. They are used as injection fluids in hydraulic props and hydraulic props; as media in electric traction coal mining machines; as transmission fluids in coal mine transportation equipment (scrapers, belt conveyors, winch gear boxes, etc.). These emulsions are easily mixed with mine water to form emulsion-contaminated mine wastewater. The wastewater has the characteristics of high chemical oxygen demand and high oil content, and contains a variety of components that are difficult to degrade naturally, such as base oils, fatty acids, surfactants, auxiliary surfactants, corrosion inhibitors, biocides and other functional additives. If it is discharged directly into natural water bodies, a water film will be formed on the surface of the water body to prevent oxygen from dissolving into the water body, thereby causing hypoxia in the water body, and then leading to the death of organisms and even threatening human life, health and safety.
[0004] At present, the methods for removing emulsions from water mainly include chemical method, physical method and biological method. The chemical method uses chemical agents to destroy the interface membrane of the emulsion, but it will cause secondary pollution; the physical method uses centrifugation, sedimentation and other methods to separate the emulsion, but the separation efficiency is low; the biological method uses microorganisms to degrade the emulsion, but the degradation rate is slow.
[0005] The treatment process of ordinary mine wastewater mainly includes coagulation, sedimentation, filtration, sterilization and other processes. The COD removal rate is low and the removal effect of emulsion is poor. These conventional treatment methods cannot effectively remove emulsion. In the existing technical solutions, such as the mine water treatment system with application publication number CN 104030493 A, coagulants and softeners are mainly added to the mine water to purify the mine water, remove suspended matter and hardness ion crystals, and then remove tiny suspended matter and colloidal substances by filtration. This method cannot effectively remove emulsion and has poor removal effect of emulsion. Therefore, it is not suitable for the treatment of mine wastewater contaminated by emulsion. Summary of the invention
[0006] The utility model aims to overcome the deficiencies of the prior art and proposes a treatment system for removing emulsions from mine water, which can purify mine water, effectively remove emulsions and avoid secondary pollution.
[0007] In order to achieve the above objectives, the utility model proposes the following technical solutions:
[0008] A treatment system for removing emulsion in mine water comprises a regulating tank, a coagulation sedimentation tank, a sludge concentration tank, an inorganic flat membrane filtration system, an aeration device and a backwashing device.
[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, a sludge output pipeline and a clear liquid output pipeline. The sludge output pipeline is connected to the sludge thickening tank; the water inlet of the inorganic flat membrane filtration system is connected to the clear liquid output pipeline of the coagulation sedimentation tank through a pipeline. The aeration device is arranged at the bottom of the inorganic flat membrane filtration system to inject air into the inorganic flat membrane filtration system. The backwashing device is arranged in the inorganic flat membrane filtration system to clean the membrane components in the inorganic flat membrane filtration system and perform chemical cleaning and backwashing.
[0010] Preferably, the inorganic flat membrane of the inorganic flat membrane filtration system is a ceramic flat membrane.
[0011] Preferably, a vertical water collection pipe is provided inside the ceramic flat membrane, and horizontal water collection pipes are provided at both ends of the membrane. The outlet of the horizontal water collection pipe at one end is connected to a suction pump. Under the suction action of the pump, raw water enters from the surface of both sides of the membrane, and suspended matter, bacteria, etc. therein are retained by the membrane. The treated water passes through the vertical water collection pipe, converges at the horizontal water collection pipe, and is pumped out by the pump.
[0012] Preferably, the inorganic flat membrane has a hollow, flat membrane shape, an asymmetric outer membrane structure, an Al2O3 membrane material, a membrane pore size of 0.1 μm, a negative pressure suction filtration method, and a ceramic strength of 200 to 300N.
[0013] The regulating tank, coagulation sedimentation tank, sludge concentration tank, inorganic flat membrane filtration system, aeration device and backwashing device involved in the utility model are all existing contents in the prior art and can be directly used by those skilled in the art.
[0014] Specifically, mine water enters the regulating tank for appropriate adjustment of water quality, water quantity and pH, and then enters the coagulation and sedimentation tank. After entering the coagulant and flocculant, the suspended particles in the mine water are flocculated and precipitated, and solid-liquid separation is achieved in the coagulation and sedimentation equipment. Large particles of solid are transferred to the sludge thickening tank, and the upper liquid of the coagulation and sedimentation tank is transported to the inorganic flat membrane filtration system. Under the action of the flat membrane, water molecules and substances with smaller molecular weight pass through the membrane to become filtered clear water, and substances with larger molecular weight such as emulsions are retained on the membrane surface to form a concentrated liquid. The aeration device is used to aerate the bottom to improve the removal effect of the inorganic flat membrane on the emulsion and reduce the degree of membrane pollution. At the same time, the backwashing device regularly chemically cleans and backwashes the inorganic flat membrane to remove pollutants on the membrane surface to maintain the filtration performance of the inorganic flat membrane.
[0015] The inorganic flat membrane filtration system filters the emulsion in the mine water to remove organic pollutants and suspended solids in the water. Relying on the membrane separation method, it can achieve the desired purification effect; the inorganic flat membrane has high mechanical strength, high wear resistance, can withstand high pressure and temperature, and is suitable for treating high temperature or fluids containing solid particles; it has good chemical stability, is stable to most chemical substances, and is not prone to chemical reactions, so it is suitable for treating various acidic and alkaline and organic solvent solutions; it has strong pollution resistance, the surface of the ceramic membrane is smooth, not easy to be polluted, and easy to clean, and can maintain a high flux and filtration efficiency for a long time; the pore size distribution is uniform, the ceramic membrane has a uniform pore size distribution, and the retention performance is stable, which can provide high-quality filtration effects; long service life, due to the durability of ceramic materials, the service life of ceramic flat membranes is usually longer than that of organic membranes, which can reduce replacement frequency and maintenance costs.
[0016] The flat membrane materials in the inorganic flat membrane filtration system are ceramic materials such as alumina and silica. The aeration device is a device used to inject air into the water. The aeration device can slow down the deposition of pollutants on the membrane surface, prevent clogging of the membrane pores, extend the service life of the ceramic flat membrane, and improve the filtration efficiency; it can reduce the frequency of chemical cleaning and the amount of chemical cleaning agents used, is more environmentally friendly, and will not produce secondary pollution. Aeration is an effective auxiliary means for inorganic flat membranes to remove emulsions from mine water.
[0017] The backwash device is a key device for cleaning membrane components in the mine water treatment system. As the filtration proceeds, pollutants will gradually accumulate on the membrane surface. When the filtration resistance reaches the set value, the backwash device will automatically start to reverse the flow of clean water or cleaning fluid to clean the membrane surface, remove the accumulated pollutants, restore the membrane's filtration performance, improve water quality, and ensure the continuous operation of the inorganic flat membrane system. Effective backwashing can extend the service life of the membrane, reduce the replacement frequency, and reduce costs.
[0018] The beneficial effects of the utility model are:
[0019] The utility model forms a treatment system for mine water containing emulsion through coagulation sedimentation and inorganic flat membrane filtration, which can effectively remove the emulsion and reduce COD.
[0020] The utility model prevents clogging of membrane holes by adding an aeration device to the inorganic flat membrane filtration system, prolongs the service life of the ceramic flat membrane, and improves filtration efficiency; it can reduce the frequency of chemical cleaning and the amount of chemical cleaning agent used, is more environmentally friendly, and will not cause secondary pollution.
[0021] The utility model adds a backwash device in the inorganic flat membrane filtration system to remove accumulated pollutants, restore the filtration performance of the membrane, improve water quality, ensure the continuous operation of the inorganic flat membrane system, extend the service life of the membrane, reduce the replacement frequency and reduce costs.
[0022] By adopting the above scheme, the utility model can purify mine water and effectively remove emulsion with high removal efficiency. At the same time, the overall device can operate stably for a long time, is simple to operate, easy to maintain, has high environmental protection performance, and will not produce secondary pollution. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] 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.
[0024] Figure 1 It is an overall flow chart of the utility model.
[0025] In the figure, 1-regulating tank, 2-coagulation sedimentation tank, 3-inorganic flat membrane filtration system, 4-sludge thickening tank; 21-coagulant adding pipeline, 22-flocculant adding pipeline, 31-water inlet, 32-water outlet, 33-aeration device, 34-backwash device. Implementation
[0026] 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 used to limit the present invention.
[0027] 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.
[0028] 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.
[0029] 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.
[0030] like Figure 1 As shown, a treatment system for removing emulsions in mine water includes a regulating tank 1, a coagulation sedimentation tank 2, a sludge concentration tank 4, an inorganic flat membrane filtration system 3, an aeration device 33 and a backwash device 34.
[0031] 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, a sludge output pipeline and a clear liquid output pipeline. The sludge output pipeline is connected to the sludge thickening tank 4; the water inlet 31 of the inorganic flat membrane filtration system 3 is connected to the clear liquid output pipeline of the coagulation sedimentation tank 2 through a pipeline, the aeration device 33 is arranged at the bottom of the inorganic flat membrane filtration system 3, and air is injected into the inorganic flat membrane filtration system 3. The backwashing device 34 is arranged in the inorganic flat membrane filtration system 3, and is used to clean the membrane components in the inorganic flat membrane filtration system 3, and perform chemical cleaning and backwashing.
[0032] Specifically, the mine water enters the regulating tank 1 for proper adjustment of water quality, water quantity and pH, and then enters the coagulation and sedimentation tank 2. After entering the coagulant and flocculant, the suspended particles in the mine water are flocculated and precipitated, and solid-liquid separation is achieved in the coagulation and sedimentation equipment. Large particles of solid are transferred to the sludge thickening tank 4, and the upper liquid of the coagulation and sedimentation tank 2 is transported to the inorganic flat membrane filtration system 3. Under the action of the flat membrane, water molecules and substances with smaller molecular weight pass through the membrane to become filtered clear water, and substances with larger molecular weight such as emulsions are retained on the membrane surface to form a concentrated liquid. The aeration device 33 is used to aerate at the bottom to improve the removal effect of the inorganic flat membrane on the emulsion and reduce the degree of membrane pollution. At the same time, the backwashing device regularly performs chemical cleaning and backwashing on the inorganic flat membrane to remove pollutants on the membrane surface to maintain the filtration performance of the inorganic flat membrane.
[0033] The flat membrane material in the inorganic flat membrane filtration system 3 is ceramic material such as alumina and silica. The aeration device 33 is a device for injecting air into the water. The aeration device 33 can slow down the deposition of pollutants on the membrane surface, prevent clogging of the membrane pores, extend the service life of the ceramic flat membrane, and improve the filtration efficiency; it can reduce the frequency of chemical cleaning and the amount of chemical cleaning agents used, is more environmentally friendly, and will not cause secondary pollution. Aeration is an effective auxiliary means for inorganic flat membranes to remove emulsions in mine water.
[0034] The backwash device 34 is a key device for cleaning membrane components in the mine water treatment system. As the filtration proceeds, pollutants will gradually accumulate on the membrane surface. When the filtration resistance reaches the set value, the backwash device will automatically start to reverse the flow of clean water or cleaning liquid to clean the membrane surface, remove the accumulated pollutants, restore the filtration performance of the membrane, improve the water quality, and ensure the continuous operation of the inorganic flat membrane system. Effective backwashing can extend the service life of the membrane, reduce the replacement frequency, and reduce costs.
[0035] Relevant experiments were conducted on mine water contaminated by emulsion, and the experimental data are as follows:
[0036]
[0037]
[0038]
[0039]
[0040] Table 1 shows the experimental data of mine water with a COD concentration of 120 mg / L and an adjusted pH of 9 treated by the treatment system when the aeration device is in the open state; Table 2 shows the experimental data of mine water with a COD concentration of 120 mg / L and an adjusted pH of 9 treated by the treatment system when the aeration device is in the closed state; Table 3 shows the comparison of COD removal rates under two treatment processes including coagulation and sedimentation only, coagulation and sedimentation and flat membrane treatment under aeration state; Table 4 shows the experimental data of mine water treated by the treatment system at different COD concentrations.
[0041] By comparing Table 1 and Table 2, we can know that under aeration conditions, the treatment effect of the ceramic flat membrane process has been optimized, the lowest effluent COD can reach 57 mg / L, and the removal rate is 52.5%. At the same time, aeration can effectively reduce the degree of membrane pollution and extend the service life of the ceramic flat membrane.
[0042] As shown in Table 3, the COD removal rate of simple coagulation and sedimentation is as low as 18.33%, while the COD removal rate can be as high as 52.5% after the flat membrane treatment with aeration turned on.
[0043] It can be seen from Table 4 that for mine water with different COD concentrations, the removal rate of this treatment system is stable at 40~52.5%, and the treatment effect of the entire treatment system is stable and the treatment effect is good.
[0044] 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 removing emulsions from mine water, comprising a regulating tank, a coagulation sedimentation tank, and a sludge thickening tank, wherein 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, a sludge output pipeline, and a clear liquid output pipeline, and the sludge output pipeline is connected to the sludge thickening tank, characterized in that: It also includes an inorganic flat membrane filtration system, an aeration device and a backwashing device. The water inlet of the inorganic flat membrane filtration system is connected to the clear liquid output pipeline of the coagulation sedimentation tank through a pipeline. The aeration device is arranged at the bottom of the inorganic flat membrane filtration system to inject air into the inorganic flat membrane filtration system. The backwashing device is arranged in the inorganic flat membrane filtration system to clean the membrane components in the inorganic flat membrane filtration system and perform chemical cleaning and backwashing.
2. A treatment system for removing emulsion from mine water according to claim 1, characterized in that: The inorganic flat membrane of the inorganic flat membrane filtration system is a ceramic flat membrane.
3. A treatment system for removing emulsion from mine water according to claim 2, characterized in that: A water collecting vertical pipe is arranged inside the ceramic flat membrane, and water collecting horizontal pipes are arranged at both ends of the membrane. The water collecting horizontal pipe opening at one end is connected to a suction pump.
4. A treatment system for removing emulsion from mine water according to claim 2, characterized in that: The inorganic flat membrane has a hollow, flat shape, an asymmetric outer membrane structure, an Al2O3 membrane material, a 0.1 μm membrane pore size, a negative pressure suction filtration method, and a ceramic strength of 200 to 300N.