Zero-emission treatment method for wastewater of chemi-mechanical pulp
A treatment method, chemical mechanical technology, applied in chemical instruments and methods, processing wastewater treatment, heating water/sewage treatment, etc. The effect of good social benefit
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[0013] Example 1
[0014] The zero-discharge treatment method of chemical mechanical pulp wastewater includes distillation concentration process and alkali recovery process, which are the following specific steps:
[0015] (1) Distillation and concentration: The wastewater with a concentration of 1.5% from the chemical machine pulp system is heated to enter the bottom of the evaporator, and is sent to the sewage distribution nozzle on the top of the evaporator by the circulating pump, and the sewage is uniformly discharged from the top of the evaporator by the distribution nozzle Distribute down to the evaporation plate. There are two circulation areas inside the evaporator. In the process of evaporation and concentration, sewage circulates in these two areas. The concentration of sewage in the first circulation area reaches 5%, and when the concentration in the second area reaches 12%, it is sent to The alkali recovery workshop is mixed with the cooking waste liquid produced by c...
Example Embodiment
[0017] Example 2
[0018] The zero-discharge treatment method of chemical mechanical pulp wastewater includes distillation concentration process and alkali recovery process, which are the following specific steps:
[0019] (1) Distillation and concentration: The wastewater with a concentration of 1.7% from the chemical machinery pulp system is heated to enter the bottom of the evaporator, and is sent to the sewage distribution nozzle on the top of the evaporator by the circulating pump, and the sewage is uniformly discharged from the top of the evaporator by the distribution nozzle Distribute down to the evaporation plate. There are two circulation areas inside the evaporator. In the process of evaporation and concentration, sewage circulates in these two areas. The concentration of sewage in the first circulation area reaches 7%, and when the concentration in the second area reaches 13%, it is sent to The alkali recovery workshop is mixed with the cooking waste liquid produced by...
Example Embodiment
[0021] Example 3
[0022] The zero-discharge treatment method of chemical mechanical pulp wastewater includes distillation concentration process and alkali recovery process, which are the following specific steps:
[0023] (1) Distillation and concentration: The waste water with a concentration of 2.0% from the chemical pulp system enters the bottom of the evaporator after heating treatment, and is sent to the sewage distribution nozzle on the top of the evaporator by the circulating pump, and the sewage is uniformly discharged from the top of the evaporator by the distribution nozzle Distribute down to the evaporation plate. There are two circulation areas inside the evaporator. During the process of evaporation and concentration, sewage circulates in these two areas. The concentration of sewage in the first circulation area reaches 8%, and when the concentration in the second area reaches 15%, it is sent to The alkali recovery workshop is mixed with the cooking waste liquid prod...
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