Boiler blowdown water recycling treatment technology based on ion exchange and chemical precipitation
A chemical precipitation and ion exchange technology, applied in the field of water pollution control, can solve the problems of large consumption of chemical agents, difficult to control effluent quality, and weakened inhibitory effect, so as to save high-quality water resources, save sludge disposal costs, and reduce treatment cost effect
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[0048] Example 1
[0049] Taking the treatment of boiler blowdown and cooling pool blowdown water of a natural gas purification plant in Sichuan as an example, the implementation steps are further explained.
[0050] (1): The total amount of sewage discharged is about 30m 3 / h boiler blowdown water is transported from the blowdown cooling pool to the high efficiency fiber filter for filtration, the filter diameter is Φ1200mm, and the filter layer height is 300mm. Filter output 25m 3 / h, the turbidity of the effluent is less than 1NTU, and the SDI is less than 3.0.
[0051] (2): The filtered water in step (1) is sent to the chlorine ion exchanger through the water purification pump, the diameter is Φ1000mm, the resin layer height is 800mm, and the design output of a single unit is 30m 3 / h, the flow rate is 15m / h. Control effluent PO through online phosphorus meter 4 3- 4 3- 8.81mg / l; effluent: turbidity 0.13NTU, pH7.13, conductivity 130us / cm, PO 4 3- 0.01mg / l.
[0052] (3): Send the ...
Example Embodiment
[0054] Example 2
[0055] Take the treatment of mixed sewage from a RB boiler in a large paper mill in Hainan as an example. The specific implementation steps are as follows:
[0056] (1): About 140m 3 / h The mixed sewage and waste water in the sewage cooling pool is filtered by a precision filter, and the flow rate of a single filter is designed to be 60m. 3 / h, the filter effluent turbidity is less than 1.0NTU, and the SDI is less than 5.0.
[0057] (2): Filter the water from step (1) and send it into the chlorine type anion exchange resin through the water purification pump. Its diameter is Φ2500mm, the resin layer is 2200mm high, and the design output of a single unit is 75m. 3 / h, the flow rate is 25m / h. Control effluent PO through online phosphorus meter 4 3- 4 3- 12.72mg / l; effluent: turbidity 0.03NTU, pH 6.96, conductivity 121us / cm, PO 4 3- 0.02mg / l.
[0058] (3): The high-quality effluent obtained in step (2) is sent to the boiler raw water tank for use in the desalination sy...
Example Embodiment
[0060] Example 3
[0061] Take the treatment of sewage from a power boiler in a petrochemical enterprise in Zhejiang as an example, the implementation steps are as follows:
[0062] (1): About 66m 3 / h Boiler sewage is sent to the high efficiency fiber filter for filtration, and the design output of the single filter is 45m. 3 / h, filter effluent turbidity is less than 1.0NTU, SDI is less than 3.0.
[0063] (2): Filter the water from step (1) and send it to the chlorine type anion exchanger through a water pump. Its diameter is Φ1500mm, the resin layer height is 1000mm, and the design output of a single unit is 65m. 3 / h, the flow rate is designed to be 20m / h. Control effluent PO through online phosphorus meter 4 3- 4 3- 10.5mg / l; effluent: turbidity 0.02NTU, pH7.81, conductivity 119us / cm, PO 4 3- 0.07mg / l.
[0064] (3): The effluent water from the ion exchanger obtained in step (2) is sent to the boiler raw water tank into the desalinated water system. When the phosphate ion in the ...
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