Nitrate-water separating device

Abstract

The invention relates to a nitrate-water separating device. The nitrate-water separating device comprises a thermal cleaning machine water tank and a nitrate quenching tank, wherein a saliferous liquid outlet pipe of a thermal cleaning tank is connected to the thermal cleaning machine water tank, the saliferous liquid outlet pipe of the thermal cleaning tank is connected with a saliferous cleaning liquid, and a pipe pump is connected between the saliferous liquid outlet pipe of the thermal cleaning tank and a saliferous cleaning liquid inlet pipe; the saliferous cleaning liquid inlet pipe leads to a fin group tube of a heat exchanger and the fin group tube of the heat exchanger is fixed in the nitrate quenching tank through a heat exchanger base support; a water vapor collecting cover is arranged above the fin group tube of the heat exchanger and connected with the thermal cleaning machine water tank through a non-saliferous water vapor outlet pipe; a concentrated saline solution accumulating funnel is arranged under the fin group tube of the heat exchanger, and a concentrated saline solution valve of the heat exchanger is arranged at the outlet end of the concentrated saline solution accumulating funnel. The nitrate-water separating device is capable of either saving energy or reducing emission, and is also capable of recycling resources and energy sources.

Description

technical field [0001] The invention belongs to the field of metal heat treatment devices, and in particular relates to a nitrate and water separation device for cleaning nitrate quenched products, separating nitrate from the cleaning liquid and returning to a nitrate quenching tank to realize zero discharge. Background technique [0002] With the requirements of metal parts structure, hardness, impact toughness and other mechanical properties, using nitrate as quenching medium has gradually become the development trend of heat treatment and quenching process. After quenching, the parts must be cleaned, and the discharge of nitrate in the cleaning solution has become an urgent problem to be solved. [0003] The workpiece after nitrate quenching (martensitic quenching) or isothermal tempering (bainite isothermal quenching) needs to be cleaned to remove the residual nitrate on the surface of the workpiece, and the nitrate component in the cleaning solution will continue to acc...

AI Technical Summary

Problems solved by technology

[0003] The workpiece after nitrate quenching (martensitic quenching) or isothermal tempering (bainite isothermal quenching) needs to be cleaned to remove the residual nitrate on the surface of the workpiece, and the nitrate component in the cleaning solution will continue to accumulate, reaching a certain proportion After that, the cleaning solution can no longer be used

The solution is, one is to discharge it, which will cause environmental pollution; the other is to recover the salt by evaporating the water by heating the nitrate. The salt concentration of the cleaning solution is very low, and a large amount of water needs to be evaporated to obtain the salt, which consumes a lot of energy.

The original two methods are not in line with energy conservation and emission reduction policies

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