Method for disposing high-concentration ammonium sulfate waste water

An ammonium sulfate, high-concentration technology, applied in water/sewage treatment, chemical instruments and methods, water/sewage multi-stage treatment, etc., to achieve the effects of reducing operating costs, low energy consumption, and saving costs

Inactive Publication Date: 2018-02-13
BEIJING MUNICIPAL RES INST OF ENVIRONMENT PROTECTION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no simple, efficient, energy-saving, and feasible treatment method for ammonium sulfate wastewater with a concentration between these

Method used

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  • Method for disposing high-concentration ammonium sulfate waste water
  • Method for disposing high-concentration ammonium sulfate waste water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0089] Embodiment 1 treats high-concentration ammonium sulfate wastewater discharged from a biopharmaceutical factory. The concentration of ammonium sulfate is about 20g / L, the COD is 4500mg / L~5000mg / L, and the discharge is 30t / d. The treatment facilities work 8 hours a day to complete the wastewater treatment work discharged on that day.

[0090] Follow the steps below to implement:

[0091] 1) Collect incoming water at different times into the regulating pool;

[0092] The high-concentration ammonium sulfate wastewater in the factory area can be collected separately, and the wastewater collected at different times is poured into the regulating pool, where a stainless steel underwater agitator is installed to ensure that the wastewater is evenly mixed. The capacity of the regulating pool can accommodate 5 days of drainage, leaving sufficient time for equipment maintenance and abnormal situations. A pump pit is arranged at the bottom of the regulating tank, and a submersible...

Embodiment 2

[0102] Example 2 A thioester antioxidant production enterprise, the discharged waste water contains part of free sulfuric acid, the mass fraction of free sulfuric acid is 32.3%, the concentration of ammonia nitrogen is 1.8mol / L, converted into ammonium sulfate concentration is about 34g / L , the water volume is 20t / d.

[0103] The treatment facility and treatment process are the same as in Example 1, but the whole process is continuous water inflow and continuous treatment, rather than sequential batch work.

[0104] 1) Collect incoming water at different times into the regulating pool;

[0105] The high-concentration ammonium sulfate wastewater in the factory area is collected separately and poured into the regulating pool. The stainless steel underwater agitator is installed in the regulating pool to ensure that the wastewater is evenly mixed. The capacity of the regulating pool can accommodate 3 days of drainage, leaving sufficient time for equipment maintenance and abnorma...

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Abstract

The invention provides a method for disposing high-concentration ammonium sulfate waste water, which orderly includes steps of (1), adjusting water quality and water amount in an adjusting pond; (2),fully mixing and reacting with absolute ethyl alcohol in a reaction pond; (3), adjusting water amount in a middle pond; (4), separating solid from fluid by a centrifugal machine; (5), recycling the solid which is separated from the centrifugal machine and is high-purity ammonium sulfate; (6), separating pure ethanol by an ethanol and water separating device and recycling it to the reaction pond, wherein the fluid separated by the centrifugal machine is mixed fluid of ethanol water, and residual ammonium sulfate. By using the property that the ammonium sulfate is easy to dissolve in water but ethanol under the room temperature and constant pressure, the ammonium sulfate waste water is reacted with absolute ethyl alcohol, thus ammonium sulfate in the ammonium sulfate waste is separated out;the recycle rate is over 92%; the absolute ethyl alcohol can be recycled, and the using cost is reduced; compared with the prior art, the method is more energy-saving and realizes the resource utilization.

Description

technical field [0001] The invention belongs to the field of wastewater treatment and relates to a novel method for treating high-concentration ammonium sulfate wastewater. Background technique [0002] Physical and chemical properties of ammonium sulfate: ammonium sulfate is colorless crystals or white particles. Odorless. Decompose above 280°C. Solubility in water: 70.6g at 0°C, 103.8g at 100°C. Insoluble in ethanol and acetone. [0003] Ammonium sulfate has a wide range of uses: it is mainly used as a fertilizer, suitable for various soils and crops; it can also be used in textiles, leather, medicine, etc.; edible ammonium sulfate is dissolved by adding distilled water to industrial ammonium sulfate, and then adding arsenic and heavy metal removal agents Ammonium sulfate is obtained by solution purification, filtration, evaporation concentration, cooling crystallization, centrifugation, and drying. It is used as a food additive, dough conditioner, and yeast nutrient; ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F101/16
CPCC02F1/38C02F1/58C02F2101/101C02F2101/16
Inventor 王珊杜兵刘寅曹建平何然
Owner BEIJING MUNICIPAL RES INST OF ENVIRONMENT PROTECTION
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