Technology for preparing injection water through low temperature multi-effect distillation and system for implementing technology

Abstract

The invention discloses a technology for preparing injection water through low temperature multi-effect distillation and a system for implementing the technology. According to the technology and the system, after purified water is preheated, the preheated purified water can be completely distilled through spraying and evaporation performed by a multi-level spraying and evaporation system repeatedly, the purified water on the rear side can be evaporated by heat of steam on the front side in the multi-level spraying and evaporation system, and thus the energy can be furthest utilized. Meanwhile, the system is relatively simple in structure, and the energy cost and the equipment manufacturing cost can be greatly saved. The technology and the system are used in the field of preparation of injection water.

Description

technical field [0001] The invention relates to the field of water injection preparation, in particular to a system and process for preparing water injection by low-temperature multi-effect distillation. Background technique [0002] "Chinese Pharmacopoeia" stipulates: water for injection is water obtained by distillation of purified water; water for injection should meet the requirements of bacterial pyrogen test; water for injection must be produced, stored and distributed under conditions to prevent pyrogen. [0003] At present, injection water is generally produced by high-temperature multi-effect distillation, but the operating conditions of this process are relatively harsh, requiring a pressure of 0.4 MPa and a temperature of 120 °C. Under these operating conditions, the surface of the heat transfer tube in the evaporator is easily scaled and the corrosion rate is fast. . Therefore, the material requirements of the system are high, and the equipment is cleaned freque...

AI Technical Summary

Problems solved by technology

[0003] At present, water for injection is generally produced by high-temperature multiple-effect distillation, but the operating conditions of this process are relatively harsh, requiring a pressure of 0.4 MPa and a temperature of 120°C. Under these operating conditions, the surface of the heat transfer tube in the evaporator is prone to fouling and corrosion.

Therefore, the material requirements of the system are high, and the equipment is cleaned frequently

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