Influence of alkali loss on multi-effect continuous evaporator
(1) In the evaporation operation, it is necessary to strengthen the control of the appropriate vacuum degree of the multi-effect continuous evaporator to prevent the liquid level from being too high and the evaporation strength from being too large, resulting in the secondary steam with alkali. In order to prevent loss of control, it is generally necessary to regularly test the alkali content of the condensate and sewage discharged from each effect. If the alkali content is found to be high, it should be investigated in time to eliminate abnormal factors. In the centrifuge salt washing, the alkali washing in the precipitated salt should be qualified to the alkali content index of the recovered brine.
Published:
2020-02-28
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(1) In the evaporation operation, it is necessary to strengthen the control of the appropriate vacuum degree of the multi-effect continuous evaporator to prevent the liquid level from being too high and the evaporation strength from being too large, resulting in the secondary steam with alkali. In order to prevent loss of control, it is generally necessary to regularly test the alkali content of the condensate and sewage discharged from each effect. If the alkali content is found to be high, it should be investigated in time to eliminate abnormal factors. In the centrifuge salt washing, the alkali washing in the precipitated salt should be qualified to the alkali content index of the recovered brine.
(2) The influence of running, running, dripping and leaking
Strengthen the management of equipment and reduce the leakage rate of static seal points and dynamic seal points. In the electrolyte multi-effect continuous evaporator, the focus should be on preventing leakage.
① Regularly overhaul and replace the heating chamber of the multi-effect continuous evaporator to prevent the material liquid from leaking into the condensed water.
② Carefully maintain and maintain the shaft seal of the salt mining pump or choose a good sealing device to reduce the leakage of the pump.
③ Pay attention to the cooling and settlement of finished alkali, and the Facility Management of the storage system to reduce the loss of concentrated alkali.
The steam consumption cost of the caustic soda multi-effect continuous evaporator is the power consumption cost of the chlor-alkali system second only to the electrolysis process. In production, it is necessary to further strengthen the internal management and technical training of operators, and at the same time actively carry out technical transformation to tap the potential of the equipment, and the device capacity can be Better play, consumption can continue to decline, thereby further improving the economic operation level of the multi-effect continuous evaporator.
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