Calcium removal fluidized bed chemical cleaning system without pickling waste liquid

Abstract

An outlet of a pickling agent box is connected with an inlet in the bottom of the calcium removal fluidized bed through a pickling starting pump, an outlet in the top of the calcium removal fluidized bed is divided into two paths, one path is connected with the pickling agent box through a pickling agent return valve, and the other path is connected with the pickling agent box through a pickling agent return valve. The other pipeline is connected with an inlet of the pickling waste liquid box through a pickling waste liquid valve; an outlet of the passivator medicine box is connected with a top inlet of the calcium removal fluidized bed through a passivation treatment starting pump, and a bottom outlet of the calcium removal fluidized bed is connected with a passivation waste liquid box through a passivation waste liquid collecting valve; an outlet of the pickling waste liquid box is connected with a bottom inlet of the calcium removal fluidized bed through a calcium removal fluidized bed water inlet pump and a calcium removal fluidized bed water inlet valve, and a top outlet of the calcium removal fluidized bed is connected with a calcium removal fluidized bed water outlet valve. All the pickling waste liquid can be treated without being discharged out of the system, and calcium resources in the waste liquid are effectively recycled.

Description

technical field [0001] The invention belongs to the field of chemical cleaning of reactors, and relates to a decalcification fluidized bed chemical cleaning system without pickling waste liquid. Background technique [0002] The decalcification crystallization fluidized bed is a kind of hardness removal equipment. During the operation, the position of the dosing port of the reactor due to the high local ion supersaturation will combine with the crystal seeds to generate large pieces of hard scale to block the dosing port, resulting in the amount of dosing. Reduced and bottom inlet pressure issues. With the increase of operating time, hard scale will also adhere to the inner wall of the fluidized bed and the viewing window, making it impossible to observe the fluid state inside the equipment. If the hard scale attached to the inner wall is irregular in shape, it will cause uneven flow field inside the equipment However, the prior art does not provide a technology for cleanin...

AI Technical Summary

Problems solved by technology

[0002] Calcium removal and crystallization fluidized bed is a kind of hardness removal equipment. During the operation, due to the high local ion supersaturation at the position of the reactor dosing port, it will combine with crystal seeds to form large hard scales to block the dosing port, resulting in the amount of dosing. Reduced and increased bottom inlet pressure problems

With the increase of running time, there will be hard scale attached to the inner wall and window of the fluidized bed, making it impossible to observe the flow state inside the equipment. If the hard scale attached to the inner wall is irregular in shape, it will cause uneven flow field inside the equipment. However, the technology for cleaning the decalcification crystallization fluidized bed has not been given in the prior art, and the chemical cleaning waste liquid produced has not been effectively classified and recycled.

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