Demineralizer and steam demineralizer of oil field superheated steam injection boiler

The invention relates to the technical field of demineralizers for oil fields and discloses a demineralizer and a steam demineralizer of an oil field superheated steam injection boiler. The demineralizer comprises a dryer and a low-pressure separator; the upper, middle and lower parts of an inner cavity of the dryer are sequentially provided with a mist catcher, a sprayer and a steam distributor; the liquid inlet end of the sprayer is connected with a high-salinity water pipeline; and the liquid inlet end of the steam distributor is connected with a steam pipeline. The demineralizer is reasonable and compact in structure and convenient to use; and the demineralizer, a steam injection boiler, an external heat exchanger and a steam-water separator are used cooperatively, so that pure superheated steam injection is realized, meanwhile, high-salinity water is effectively treated, the thermal efficiency of the boiler is increased by virtue of waste heat of high-temperature salifarous water, the demineralizer has t