Decolorizer for dyeing wastewater

Abstract

The invention provides a decolorizer for dyeing wastewater and a preparation method for treatment of the dyeing wastewater. The decolorizer is prepared from, in parts by weight, 1-3 parts of an agentA, 2-5 parts of an agent B and 5-7 parts of water; wherein the agent A is prepared from dicyandiamide, hydrochloric acid, a catalyst and aluminum sulfate, and the agent B is prepared from dodecyl dimethyl ammonium chloride, benzyl chloride and water. The decolorizer has the advantages of small dosage, high decolorization rate, wide application range and the like.

Description

technical field

[0001] The invention relates to the technical field of printing and dyeing wastewater treatment, in particular to a decolorizer for printing and dyeing wastewater. Background technique

[0002] Sewage treatment generally adopts the combined process of "physical and chemical precipitation (or air flotation) + anaerobic (or facultative oxygen) + aerobic + physical and chemical precipitation", which not only effectively removes more than 40% of COD and others such as suspended solids and ammonia nitrogen through flocculation , At the same time, it has a certain decolorization effect. After the biochemical water is discharged, many enterprises can meet the standards of other indicators, except for the chroma, which is generally light yellow or brown. For example: coking wastewater, printing and dyeing wastewater. Papermaking wastewater, etc. Powerful units can adopt activated carbon filtration adsorption or ClO2, O3 oxidation decolorization or even membrane se...

Examples

Embodiment 1

[0030] A decolorizing agent for printing and dyeing sewage, comprising: 1 part of agent A, 2 parts of agent B, and 5 parts of water, adding the agent A, agent B and water into the stirring tank according to the proportion and stirring at a constant speed, stirring evenly After that, the decolorizer for printing and dyeing sewage is obtained.

[0031] Wherein, the preparation method of the A agent is as follows: add dicyandiamide, hydrochloric acid, catalyst, and aluminum sulfate into the reaction kettle in sequence according to the mass ratio of 5:3:1:10, stir and heat to 65°C; Insulate for 3 hours, stop stirring, and cool to room temperature to obtain agent A.

[0032] The preparation method of the B agent is as follows: add lauryl dimethyl ammonium chloride, benzyl chloride, and water into the reaction kettle in sequence according to the mass ratio of 3:1.5:5.5, stir and heat to 55°C; After the end, keep warm for 3 hours, stop stirring, and cool to room temperature to obtai...

Embodiment 2

[0035] A decolorizing agent for printing and dyeing sewage, comprising: 1 part of agent A, 2 parts of agent B, and 5 parts of water, adding the agent A, agent B and water into the stirring tank according to the proportion and stirring at a constant speed, stirring evenly After that, the decolorizer for printing and dyeing sewage is obtained.

[0036] Wherein, the preparation method of the A agent is as follows: add dicyandiamide, hydrochloric acid, catalyst, and aluminum sulfate into the reaction kettle in sequence according to the mass ratio of 5:3:1:10, stir and heat to 72°C; Insulate for 4 hours, stop stirring, and cool to room temperature to obtain agent A.

[0037] The preparation method of the B agent is as follows: add lauryl dimethyl ammonium chloride, benzyl chloride, and water into the reaction kettle in sequence according to the mass ratio of 3:1.5:5.5, stir and heat to 70°C; After the end, keep warm for 4 hours, stop stirring, and cool to room temperature to obtai...

Embodiment 3

[0039] A decolorizing agent for printing and dyeing sewage, comprising: 1 part of agent A, 2 parts of agent B, and 5 parts of water, adding the agent A, agent B and water into the stirring tank according to the proportion and stirring at a constant speed, stirring evenly After that, the decolorizer for printing and dyeing sewage is obtained.

[0040] Wherein, the preparation method of the A agent is as follows: add dicyandiamide, hydrochloric acid, catalyst, and aluminum sulfate into the reaction kettle in sequence according to the mass ratio of 5:3:1:10, stir and heat to 80°C; Insulate for 5 hours, stop stirring, and cool to room temperature to obtain agent A.

[0041] The preparation method of the B agent is as follows: add lauryl dimethyl ammonium chloride, benzyl chloride, and water into the reaction kettle in sequence according to the mass ratio of 3:1.5:5.5, stir and heat to 85°C; After the end, keep warm for 5 hours, stop stirring, and cool down to room temperature to ...

technical field

[0001] The invention relates to the technical field of printing and dyeing wastewater treatment, in particular to a decolorizer for printing and dyeing wastewater. Background technique

[0002] Sewage treatment generally adopts the combined process of "physical and chemical precipitation (or air flotation) + anaerobic (or facultative oxygen) + aerobic + physical and chemical precipitation", which not only effectively removes more than 40% of COD and others such as suspended solids and ammonia nitrogen through flocculation , At the same time, it has a certain decolorization effect. After the biochemical water is discharged, many enterprises can meet the standards of other indicators, except for the chroma, which is generally light yellow or brown. For example: coking wastewater, printing and dyeing wastewater. Papermaking wastewater, etc. Powerful units can adopt activated carbon filtration adsorption or ClO2, O3 oxidation decolorization or even membrane se...

Examples

Embodiment 1

[0030] A decolorizing agent for printing and dyeing sewage, comprising: 1 part of agent A, 2 parts of agent B, and 5 parts of water, adding the agent A, agent B and water into the stirring tank according to the proportion and stirring at a constant speed, stirring evenly After that, the decolorizer for printing and dyeing sewage is obtained.

[0031] Wherein, the preparation method of the A agent is as follows: add dicyandiamide, hydrochloric acid, catalyst, and aluminum sulfate into the reaction kettle in sequence according to the mass ratio of 5:3:1:10, stir and heat to 65°C; Insulate for 3 hours, stop stirring, and cool to room temperature to obtain agent A.

[0032] The preparation method of the B agent is as follows: add lauryl dimethyl ammonium chloride, benzyl chloride, and water into the reaction kettle in sequence according to the mass ratio of 3:1.5:5.5, stir and heat to 55°C; After the end, keep warm for 3 hours, stop stirring, and cool to room temperature to obtai...

Embodiment 2

[0035] A decolorizing agent for printing and dyeing sewage, comprising: 1 part of agent A, 2 parts of agent B, and 5 parts of water, adding the agent A, agent B and water into the stirring tank according to the proportion and stirring at a constant speed, stirring evenly After that, the decolorizer for printing and dyeing sewage is obtained.

[0036] Wherein, the preparation method of the A agent is as follows: add dicyandiamide, hydrochloric acid, catalyst, and aluminum sulfate into the reaction kettle in sequence according to the mass ratio of 5:3:1:10, stir and heat to 72°C; Insulate for 4 hours, stop stirring, and cool to room temperature to obtain agent A.

[0037] The preparation method of the B agent is as follows: add lauryl dimethyl ammonium chloride, benzyl chloride, and water into the reaction kettle in sequence according to the mass ratio of 3:1.5:5.5, stir and heat to 70°C; After the end, keep warm for 4 hours, stop stirring, and cool to room temperature to obtai...

Embodiment 3

[0039] A decolorizing agent for printing and dyeing sewage, comprising: 1 part of agent A, 2 parts of agent B, and 5 parts of water, adding the agent A, agent B and water into the stirring tank according to the proportion and stirring at a constant speed, stirring evenly After that, the decolorizer for printing and dyeing sewage is obtained.

[0040] Wherein, the preparation method of the A agent is as follows: add dicyandiamide, hydrochloric acid, catalyst, and aluminum sulfate into the reaction kettle in sequence according to the mass ratio of 5:3:1:10, stir and heat to 80°C; Insulate for 5 hours, stop stirring, and cool to room temperature to obtain agent A.

[0041] The preparation method of the B agent is as follows: add lauryl dimethyl ammonium chloride, benzyl chloride, and water into the reaction kettle in sequence according to the mass ratio of 3:1.5:5.5, stir and heat to 85°C; After the end, keep warm for 5 hours, stop stirring, and cool down to room temperature to ...