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Water purification equipment of special medicament for removing hardness ions in underground water

A technology of hardness ions, water purification equipment, applied in water softening, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc. Long response time and other problems, to achieve the effect of rapid hardness removal process, good effluent quality and small footprint

Active Publication Date: 2013-11-20
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the precipitation method usually uses calcium hydroxide, sodium hydroxide, sodium carbonate and other agents as precipitants. The precipitation reaction time is long, the reaction is not complete, the residual concentration of calcium and magnesium ions is high, the effect of reducing hardness is not obvious, and it will also lead to The pH of the product water increases significantly

Method used

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  • Water purification equipment of special medicament for removing hardness ions in underground water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Special agents for removing hardness ions in groundwater, including sodium hydroxide, powdered kaolin, and polyaluminum chloride in a weight ratio of 8:0.5:1.5. Among them, the particle size of kaolin is below 0.5 μm, and the sodium hydroxide is food grade sodium hydroxide.

[0030] Water purification equipment used to remove special chemicals for hardness ions in groundwater, see figure 1 , including a medicament dosing unit 1, a water inlet unit 2, and a sedimentation reaction unit 3, a filtration unit 4, and a disinfection unit 5 connected sequentially from bottom to top. The medicament dosing unit 1 is arranged on the water inlet unit 2, and the water inlet unit 2 is connected with precipitation reaction unit 3. The water inlet unit 1 includes a water inlet pump 11 , a medicament dosing port 12 and a tubular static mixer 13 sequentially arranged on a water inlet pipe 14 . The medicament dosing unit 2 includes a medicament barrel 21 and a dosing pump 22 sequentiall...

Embodiment 2

[0036] A special agent for removing hardness ions in groundwater, including sodium hydroxide, powdered kaolin, and polyaluminum chloride in a weight ratio of 9:0.3:0.7. Among them, the particle size of kaolin is 0.01-0.1 μm, and the sodium hydroxide is food grade sodium hydroxide.

[0037] The water purification equipment used to remove the special agent for hardness ions in groundwater is basically the same as the water purification equipment in Example 1, except that the top of the water distribution device is paved with 20cm high pebbles, and the particle size of the pebbles is 2-5mm; The filter unit 4 uses coarse sand quartz sand filter material with a particle size of 1.35mm as the filter layer, and the thickness of the filter layer is 2.0m.

[0038] Utilize the groundwater whose initial total hardness of the above-mentioned medicament is 480mg / L, pH is 7.75, comprises the following steps:

[0039] (1) Utilize the water inlet unit to lead into groundwater, and drop in th...

Embodiment 3

[0043] Special agents for removing hardness ions in groundwater, including sodium hydroxide, powdered kaolin, and polyaluminum chloride at a weight ratio of 8.4:0.5:1.2. Among them, the particle size of kaolin is below 0.4 μm, and the sodium hydroxide is food grade sodium hydroxide.

[0044] The water purification equipment used to remove the special agent for hardness ions in groundwater is basically the same as the water purification equipment in Example 1, the only difference being: the top of the water distribution device is paved with 25 cm high pebbles, and the particle size of the pebbles is 2-5mm; The filter unit 4 uses coarse sand quartz sand filter material with a particle size of 1.10mm as the filter layer, and the thickness of the filter layer is 1.6m.

[0045] Utilize the groundwater whose initial total hardness of the above-mentioned medicament is 480mg / L, pH is 7.75, comprises the following steps:

[0046] (1) Utilize the water inlet unit to lead into the groun...

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Abstract

Provided water purification equipment of a special medicament for removing hardness ions in underground water comprises a medicament adding unit (1), a water inlet unit (2), and a precipitation reaction unit (3), a filtering unit (4) and a disinfection unit (5) which are successively connected from bottom to top; the medicament adding unit (1) is disposed above the water inlet unit (2); the water inlet unit (2) is connected with the precipitation reaction unit (3); and the disinfection unit (5) is also used as a backwashing water tank. The equipment is designed according to the reaction process and the characteristics of the special medicament for removing the hardness ions in underground water, and has the advantages of rapid hardness removing process, simple operation, low operation cost, good effluent quality, and small land occupation area.

Description

technical field [0001] The invention relates to the field of drinking water treatment, in particular to a new type of water purification equipment using a special agent for removing hardness of ground water. Background technique [0002] Too high or too low water hardness will affect our human health, and it will also bring inconvenience to daily life. For example, when washing with hard water, it will react with soap to produce insoluble precipitates. In addition to affecting the washing effect, it will also make the fibers of the clothes hard, brittle and easily damaged. When washing hair with hard water, it will be astringent. The current "Drinking Water Sanitation Standard" (GB5749-2006) stipulates that the total hardness content in drinking water should be less than 450mg / L (calculated as CaCO 3 count). [0003] Conventional processes for the removal of total hardness in drinking water are mainly chemical precipitation, ion exchange, reverse osmosis, and nanofiltratio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F5/02C02F9/04
Inventor 刘成陈卫张程胡伟
Owner HOHAI UNIV