Treatment method of alkaline pulp waste liquid

Abstract

The invention discloses a treatment method of alkaline pulp waste liquid. The method comprises the steps that hydrogen type ion exchange resin or chelating resin package makes full contact with pulp waste liquid, the hydrogen type ion exchange resin or chelating resin package is taken out, washed and immersed through acid, and the hydrogen type ion exchange resin or the chelating resin is obtained by washing resin through water; the steps are repeated till the treated pulp waste liquid is neutral. According to the treatment method of the alkaline pulp waste liquid, the whole process route can make harmless treatment and comprehensive utilization of the alkaline pulp waste liquid truly achieved.

Description

technical field

[0001] The invention belongs to the field of sewage treatment, and in particular relates to a treatment method for alkaline pulp waste liquid. Background technique

[0002] Using cotton linters as raw material, a high-purity cellulose cotton pulp can be obtained through alkaline cooking, rinsing and refining. In this process, a large amount of alkaline pulp waste liquid will be produced, and most of the large amount of waste water will be directly discharged into the desert sewage reservoir through pipelines. The existence of a large amount of alkali in the pulp waste liquid makes the sewage reservoir have nothing but reeds. other aquatic plants.

[0003] Pulp wastewater is divided into: pulp black liquor, pre-bleach wastewater and post-bleach wastewater. Cellulose, hemicellulose, lignin soluble in alkali and other products produced during the cooking process will remain in the pulp wastewater, and the COD value can reach more than 10000mg / L, causing seriou...

Examples

Embodiment 1

[0031] At room temperature, weigh 10g of ion exchange resin and soak it in 10mL of 12mol / L concentrated hydrochloric acid, take it out after 10min, wash and filter it 3 times with clean water, put it in 50mL pulp waste liquid, take it out after 1min, repeat the operation 10 times, The treated nearly neutral pulp waste liquid is evaporated to dryness to obtain the organic mixture in the waste liquid.

Embodiment 2

[0033] At room temperature, weigh 30g of ion exchange resin and soak it in 30mL12mol / L concentrated hydrochloric acid, take it out after 10min, wash and filter it 3 times with clean water, put it in 50mL pulp waste liquid, take it out after 1min, repeat the operation 4 times, and put the treated The nearly neutral pulp waste liquid is evaporated to dryness to obtain the organic mixture in the waste liquid.

Embodiment 3

[0035] At room temperature, weigh 30g of ion exchange resin and soak it in 30mL12mol / L concentrated hydrochloric acid, take it out after 10min, wash and filter it twice with clean water, put it in 40mL pulp waste liquid, take it out after 1min, repeat the operation 3 times, and put the treated The nearly neutral pulp waste liquid is evaporated to dryness to obtain the organic mixture in the waste liquid.

technical field

[0001] The invention belongs to the field of sewage treatment, and in particular relates to a treatment method for alkaline pulp waste liquid. Background technique

[0002] Using cotton linters as raw material, a high-purity cellulose cotton pulp can be obtained through alkaline cooking, rinsing and refining. In this process, a large amount of alkaline pulp waste liquid will be produced, and most of the large amount of waste water will be directly discharged into the desert sewage reservoir through pipelines. The existence of a large amount of alkali in the pulp waste liquid makes the sewage reservoir have nothing but reeds. other aquatic plants.

[0003] Pulp wastewater is divided into: pulp black liquor, pre-bleach wastewater and post-bleach wastewater. Cellulose, hemicellulose, lignin soluble in alkali and other products produced during the cooking process will remain in the pulp wastewater, and the COD value can reach more than 10000mg / L, causing seriou...

Examples

Embodiment 1

[0031] At room temperature, weigh 10g of ion exchange resin and soak it in 10mL of 12mol / L concentrated hydrochloric acid, take it out after 10min, wash and filter it 3 times with clean water, put it in 50mL pulp waste liquid, take it out after 1min, repeat the operation 10 times, The treated nearly neutral pulp waste liquid is evaporated to dryness to obtain the organic mixture in the waste liquid.

Embodiment 2

[0033] At room temperature, weigh 30g of ion exchange resin and soak it in 30mL12mol / L concentrated hydrochloric acid, take it out after 10min, wash and filter it 3 times with clean water, put it in 50mL pulp waste liquid, take it out after 1min, repeat the operation 4 times, and put the treated The nearly neutral pulp waste liquid is evaporated to dryness to obtain the organic mixture in the waste liquid.

Embodiment 3

[0035] At room temperature, weigh 30g of ion exchange resin and soak it in 30mL12mol / L concentrated hydrochloric acid, take it out after 10min, wash and filter it twice with clean water, put it in 40mL pulp waste liquid, take it out after 1min, repeat the operation 3 times, and put the treated The nearly neutral pulp waste liquid is evaporated to dryness to obtain the organic mixture in the waste liquid.

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