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Coagulating sedimentation agent for treating low-temperature low-turbidity water

A low-temperature, low-turbidity water, coagulation and sedimentation technology, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problems of poor coagulation treatment effect of low-temperature and low-turbidity water, and achieve good turbidity removal performance, fast settlement, and water discharge The effect of water quality improvement

Inactive Publication Date: 2014-03-26
JILIN ELECTRIC POWER RES INST +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The invention provides a coagulation-settling agent for treating low-temperature and low-turbidity water to solve the problem of poor coagulation treatment effect of low-temperature and low-turbidity water

Method used

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  • Coagulating sedimentation agent for treating low-temperature low-turbidity water
  • Coagulating sedimentation agent for treating low-temperature low-turbidity water
  • Coagulating sedimentation agent for treating low-temperature low-turbidity water

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preparation example Construction

[0026] (1) Preparation of oxidized polymeric silicic acid: take SiO 2 The content is 26.2% industrial water glass solution 100g (36.4mL) diluted to SiO 2 The concentration is 2% (0.458mol / L), the volume of the solution is 467.8mL, the active silicic acid is produced by the copolymerization method, that is, the content of silica is fixed, and the pH value is adjusted to 3.8 with 0.1mol / L hydrochloric acid under the condition of rapid stirring , and add 2 times the volume of diluted water glass solution, ClO with a concentration of 20g / L 2 solution, so that the active silicic acid contains 13.3g / L of ClO 2 , placed at 20°C to 25°C to ripen and polymerize for 6 to 8 hours to obtain an oxidized polymeric silicic acid in the form of a light blue gel with a total volume of 1419mL and a pH value of 3.8;

[0027] (2) Preparation of oxidized polyaluminum ferric silicate: at 20°C to 25°C, take 50mL of the prepared oxidized polysilicic acid and stir rapidly, add 0.3mol / L aluminum sulfa...

Embodiment 1

[0029] Composed of raw materials in the following mass-volume (mg / mL) ratio:

[0030] The ratio of coal-based activated carbon powder to oxidized polyaluminum iron silicate is 1:1,

[0031] The coal-based activated carbon powder: coal-based activated carbon with a particle size of 0.325-0.42 mm and an apparent density of 0.55 g / mL.

Embodiment 2

[0033] Composed of raw materials in the following mass-volume (mg / mL) ratio:

[0034] The ratio of coal-based activated carbon powder to oxidized polyaluminum iron silicate is 5:1;

[0035] The coal-based activated carbon powder: coal-based activated carbon with a particle size of 0.325-0.42 mm and an apparent density of 0.55 g / mL.

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Abstract

The invention relates to a coagulating sedimentation agent for treating low-temperature low-turbidity water and belongs to the field of applied chemistry, in particular to the field of coagulating sedimentation treatment agents of low-temperature low-turbidity water. The coagulating sedimentation agent consists of coaly activated carbon powder and oxidized polysilicate aluminium ferric according to a mass-to-volume ratio (mg / mL) of 1:1 to 10:1. The coagulating sedimentation agent is capable of breaking through the limitation that the sedimentation effects of conventional aluminum and iron salt coagulating agents are greatly influenced by factors such as water inlet temperature, suspended solids and turbidity, is taken as a high-efficiency, economic and environment-friendly coagulating agent for treating low-temperature low-turbidity water generated from power plants and water works and industrial water (living water, wastewater and the like), and has high economic benefits and obvious social benefits.

Description

technical field [0001] The invention belongs to the field of applied chemistry, in particular to the field of coagulation and sedimentation treatment agents for low-temperature and low-turbidity water. Background technique [0002] Coagulation and sedimentation equipment is the key equipment for industrial water pretreatment. At present, the use of coagulation and sedimentation equipment to treat low-temperature and low-turbidity water (especially in the three northeastern provinces) is still a subject to be solved in the field of water treatment. There are mainly the following problems: (1 ) mostly use a single aluminum salt and iron salt coagulant, resulting in low operating output of clarification tanks and sedimentation tanks, and unqualified effluent water quality, especially when the effluent water is used for drinking water, a single aluminum salt will introduce excessive aluminum into tap water ions, resulting in secondary pollution (drinking water aluminum control v...

Claims

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Application Information

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IPC IPC(8): C02F1/52
Inventor 张春波王久生孙天利张建新
Owner JILIN ELECTRIC POWER RES INST
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