Efficient hardness removal method and device applicable to underground water

A groundwater and hardness technology, which is applied in the field of water treatment, can solve the problems of complex lime softening process, large floor area, and low effective utilization rate of lime, so as to save resource consumption, reduce floor space, reduce equipment investment and operation cost effect

Active Publication Date: 2014-07-16
BEIJING UNIV OF TECH
View PDF10 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The method and device are mainly aimed at the problems of complex lime soften

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Efficient hardness removal method and device applicable to underground water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Processing flow Q=10m 3 / h, the effective volume of the groundwater hardness removal device is 9.1m 3 , where the volumes of reaction zones I, II, and III are 0.417m 3 、0.833m 3 、0.833m 3 , the volume of the sedimentation zone is 6.67m 3 . The speed of the inclined-blade paddle agitator is 430r / min, and the angles of the paddle blades distributed in the three reaction zones are all 45°. The lengths of the blades are 650mm, 550mm and 250mm from bottom to top, and the widths are 65mm, 55mm and 25mm respectively. . The raw water is groundwater with a total hardness of 390mg / L and a total alkalinity of 320mg / L. The concentration of milk of lime is 3%, FeCl 3 The concentration of the solution is 5%, the dosage of CaO is 225mg / L, FeCl 3 The dosage is 5mg / L, and the turbidity of the effluent and the total hardness of the filtered effluent are monitored. After the device runs for 1 hour, the milk of lime and CaCO in the sediment 3 It has accumulated to a certain exten...

Embodiment 2

[0025] Processing flow Q=10m 3 / h, the effective volume of the groundwater hardness removal device is 9.1m 3 , where the volumes of reaction zones I, II, and III are 0.417m 3 、0.833m 3 、0.833m 3 , the volume of the sedimentation zone is 6.67m 3. The speed of the inclined-blade paddle agitator is 430r / min, and the angles of the paddle blades distributed in the three reaction zones are all 45°. The lengths of the blades are 650mm, 550mm and 250mm from bottom to top, and the widths are 65mm, 55mm and 25mm respectively. . The raw water is groundwater with a total hardness of 390mg / L and a total alkalinity of 320mg / L. The concentration of milk of lime is 3%, AlCl 3 The concentration of the solution is 5%, the dosage of CaO is 225mg / L, AlCl 3 The dosage is 7mg / L, and the turbidity of the effluent and the total hardness of the filtered effluent are monitored. After the device runs for 1 hour, the milk of lime and CaCO in the sediment 3 It has accumulated to a certain extent...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses efficient hardness removal method and device applicable to underground water, belonging to the field of water treatment technologies. The device is divided into a reaction zone, a diversion zone IV and a settling zone V from the inside to outside; a pitched blade type stirrer is arranged at the very center of the device and penetrates through the whole reaction zone; three groups of paddles are arranged on a rotation shaft of the stirrer from the bottom to top; the reaction zone is divided into three reaction control zones I, II and III from the bottom to top; the speed gradients G of the three zones are decreased in sequence; and four baffle plates are uniformly fixed on the inner wall of the reaction zone. The reaction process comprises the steps of respectively importing raw water and lime milk into the lower part of the reaction zone I through a water inlet pipe and a CaO addition pipe, importing a flocculating agent into the upper part of the reaction zone I through a flocculating agent addition pipe, ensuring the elevation f the water flow and the backflow process of the settling through the elevation function of the pitched blade type stirrer, completing the coagulation process during the lime softening process, and draining the clean water from a catch basin via a water outlet, wherein the precipitates are increased gradually along the long-time running of the reaction device, so that the part of the precipitates need to be discharged through a sludge removal emptying pipe at regular intervals.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to a method and a device suitable for efficiently removing groundwater hardness. Background technique [0002] my country's "Drinking Water Hygienic Standards" stipulates that the hardness standard of drinking water is 450mg / L (calculated as CaCO 3 count). The total hardness value of a lot of groundwater is between 300mg / L and 450mg / L. Although it does not exceed the specified standard, the calcium and magnesium ions in the water are still high, which is not good for human health, especially because of the HCO in the temporary hardness. 3 - In the presence of ions, there will be precipitation or floating matter after the water is boiled, which makes it unacceptable to the human senses. HCO 3 - Water with a relatively high ion content will produce more residues after heating and boiling, and the scaling of hot water supply pipelines and water containers will ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C02F1/52
Inventor 杨宏赵月兰鄢琳吴城锋管清坤王小乐陈伟王猛孟婷陶慕翔尚海源胡希佳王玉洁姚仁达
Owner BEIJING UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap