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Chlorine water dechlorinating system and use method thereof

A chlorinated water and dechlorination technology, applied in chemical instruments and methods, water pollutants, multi-stage water treatment, etc., can solve problems such as corrosion of sewers, low dark holes, metal corrosion, etc., to increase the proportion of halogen used, reduce Lower production cost and better effluent quality

Pending Publication Date: 2018-07-31
JIANGSU ANPON ELECTROCHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chlorine can also react with water to form hypochlorite ions, which have a strong corrosive effect on metals, severely corrode sewers, and even form low dark holes

Method used

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  • Chlorine water dechlorinating system and use method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A method for using a chlorinated water dechlorination system comprises the steps of:

[0033] Step 1: Chlorine water pump I2 pressurizes the chlorine water in the chlorine water tank 1 to the chlorine water heater 3 and heats it to 84°C, then adds hydrochloric acid through the hydrochloric acid inlet nozzle 12 and controls the inlet through the hydrochloric acid flow regulating valve 4 Add acid to chlorine water to adjust pH to 1.5;

[0034]Step 2: the chlorine water is delivered to the chlorine water dechlorination tower I5 and the chlorine water dechlorination tower II8 for dechlorination treatment, and the dechlorination tower liquid level controller 26 controls the level of the chlorine water dechlorination tower II8 and the chlorine water dechlorination tower I5 The liquid level is equal and the distance between the liquid level and the top of the tower is controlled to be 0.6m, and the evaporated chlorine and water vapor are absorbed by the top of the tower and co...

Embodiment 2

[0041] A method for using a chlorinated water dechlorination system comprises the steps of:

[0042] Step 1: Chlorine water pump I2 pressurizes the chlorine water in the chlorine water tank 1 to the chlorine water heater 3 and heats it to 85°C, then adds hydrochloric acid through the hydrochloric acid inlet nozzle 12 and controls the inlet through the hydrochloric acid flow regulating valve 4 Adjust the pH to 1.65 by adding acid to the tower chlorine water;

[0043] Step 2: the chlorine water is delivered to the chlorine water dechlorination tower I5 and the chlorine water dechlorination tower II8 for dechlorination treatment, and the dechlorination tower liquid level controller 26 controls the level of the chlorine water dechlorination tower II8 and the chlorine water dechlorination tower I5 The liquid level is equal and the distance between the liquid level and the top of the tower is controlled to be 0.7m, and the evaporated chlorine and water vapor are absorbed by the top ...

Embodiment 3

[0050] A method for using a chlorinated water dechlorination system comprises the steps of:

[0051] Step 1: Chlorine water pump I2 pressurizes the chlorine water in the chlorine water tank 1 to the chlorine water heater 3 and heats it to 86°C, then adds hydrochloric acid through the hydrochloric acid inlet nozzle 12 and controls the inlet through the hydrochloric acid flow regulating valve 4 Adjust the pH to 1.8 by adding acid to the tower chlorine water;

[0052] Step 2: the chlorine water is delivered to the chlorine water dechlorination tower I5 and the chlorine water dechlorination tower II8 for dechlorination treatment, and the dechlorination tower liquid level controller 26 controls the level of the chlorine water dechlorination tower II8 and the chlorine water dechlorination tower I5 The liquid level is equal and the distance between the liquid level and the top of the tower is controlled to be 0.8m, and the evaporated chlorine and water vapor are absorbed by the top o...

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Abstract

The invention relates to a chlorine water dechlorinating system and a use method thereof. A measuring device comprises a dechlorinating unit, a detecting unit and a waste discharge unit; core equipment comprises a chlorine water tank, a cooler, chlorine water dechlorinating towers and chlorine water pumps. The use method comprises the following steps: adding hydrochloric acid into chlorine water,adjusting the pH value to 1.5 to 1.8 and heating to 84 to 86 DEG C; then conveying the chlorine water into the chlorine water dechlorinating towers for carrying out dechlorinating treatment, absorbingthe evaporated chlorine and water vapor into a cooler for liquefying and collecting by the top of the tower, adding sodium hydroxide into the remaining wastewater and adjusting the pH value to 9 to 11; then adding sodium sulfite into the wastewater and adjusting the content of free chlorine to 0; finally, conveying the dechlorinated chlorine water in a dechlorination chlorine water storage tank to a centralized treatment station by using the dechlorination chlorine water pumps. The chlorine water dechlorinating system disclosed by the invention has the advantages of environment friendliness,conservation and simple and convenient design operation.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to a chlorine water dechlorination system and an application method thereof. Background technique [0002] In the process of chlor-alkali production, increasing the proportion of halogen used can greatly reduce the cost of caustic soda. The ion membrane alkali production device has a light brine dechlorination unit. The dechlorination unit processes ion membrane alkali light brine, chlorine water and diaphragm alkali chlorine water. After dechlorination, the light brine and chlorine water are sent to denitrification. According to the salt and water balance calculation of the production system, the water in the production system is relatively excessive, and the excess water needs to be saturated with solid salt, which reduces the proportion of brine used and increases the production cost. [0003] At the same time, the high-humidity chlorine gas produced in chlor-alkali production is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10C02F101/12
CPCC02F1/048C02F1/20C02F1/66C02F2301/08C02F2101/12
Inventor 唐素荣姜育田朱学军张树山万金方
Owner JIANGSU ANPON ELECTROCHEM
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