Deep treatment system and process for fluorine-containing mine water
A technology for advanced treatment and mine water, which is applied in water/sewage treatment, water/sludge/sewage treatment, flocculation/sedimentation water/sewage treatment, etc. It can solve the problems of inability to remove fluoride, frequent regeneration of adsorbed fluorine capacity, and fluoride removal High cost and other problems, to achieve the effect of reducing the amount of chemicals used, stable treatment effect, and low cost
Pending Publication Date: 2022-03-18
陕西长武亭南煤业有限责任公司 +1
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Problems solved by technology
[0003] The current mine water treatment process is mainly coagulation sedimentation + valveless filter, which cannot effectively remove fluoride in mine water
The processes for removing fluoride in water include coagulation precipitation, adsorption, membrane separation, electrocoagulation, etc., but a single process technology has corresponding shortcomings. The L standard needs to add a large amount of coagulation and flocculation agents, and the capacity of the adsorption method to absorb fluorine is limited and requires frequent regeneration, etc.
In addition, for mine water with a large amount of water to be treated, the overall cost of fluoride removal is also the biggest problem
Method used
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[0058] Such as figure 1 A fluorine-containing mine water advanced treatment system is shown, which is composed of the following four units: detection control unit 1, adjustment reaction unit 2, sedimentation unit 3, and depth removal unit 4.
[0059] The detection and control unit 1 is used for the quality and quantity of mine water inflow and outflow, and the control of chemical addition and sediment return; the adjustment reaction unit 2 is used for adjustment of ion ratio in mine water and the addition of defluoride agent; the sedimentation unit 3 is used for preliminary precipitation to remove part of fluorine compound; depth removal unit 4 is used for depth induced crystallization to remove fluorine. The detection control unit 1, the adjustment reaction unit 2, the sedimentation unit 3 and the depth removal unit 4 are connected by pipelines. According to the actual application scenario, weirs and grooves can also be selected to connect the above units. The detection and ...
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Abstract
The invention belongs to the technical field of mine water treatment, and particularly relates to a fluorine-containing mine water advanced treatment system and process. According to the invention, fluorine-containing mine water firstly passes through the detection control unit to obtain the water quantity, pH and fluorine, calcium and bicarbonate ion concentration of the mine water, the water quantity, the pH and the fluorine, calcium and bicarbonate ion concentration are fed back to the terminal control system, then the mine water enters a regulating pool of the regulating reaction unit, the ion ratio and the pH in the mine water are regulated through the terminal control system, and then the mine water enters the medicament reaction pool. A fluorine removal agent is added through a terminal control system, then mine water enters a sedimentation tank of a sedimentation unit to be subjected to sedimentation and fluorine removal, part of sediment obtained after sedimentation flows back through a sediment backflow metering pump, and the rest sediment enters a filter-pressing screening system through a filter-pressing metering pump to be graded and is used for a deep removal unit. And the effluent of the sedimentation unit enters a deep removal unit for induced crystallization and deep fluorine removal.
Description
technical field [0001] The invention belongs to the technical field of mine water treatment, and in particular relates to a fluorine-containing mine water advanced treatment system and process. Background technique [0002] my country is a big country in the coal industry. Generally, during the mining of coal, a large amount of mine water will be generated due to underground water gushing. Some studies have shown that mining 1 ton of coal will produce about 4 tons of mine water. For example, the annual output of coal in the Yellow River Basin accounts for 70% of the country, and its corresponding mine water volume has reached more than 1.2 billion tons. Since fluorine is a lithophilic element, its content in the formation is relatively high, and the content of fluorine in coal is about 150mg / kg. Therefore, the fluorine content of mine water in many coal mines exceeds III in the "Environmental Quality Standards for Surface Water" The limit value of fluoride (1.0mg / L) in water...
Claims
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IPC IPC(8): C02F1/52C02F1/58
CPCC02F1/5245C02F1/583C02F2101/14
Inventor 王洪涛徐旭峰杨桂磊郑利祥徐志远崔东锋刘平杨洋黄文先李锐张兵
Owner 陕西长武亭南煤业有限责任公司