Atmospheric pressure coordinated mvr energy-saving unit and energy-saving process

Abstract

The invention relates to the technical field of evaporators, in particular to an atmospheric synergetic MVR energy saving unit and an energy saving process. A material adoption pipeline is connected with the material inlet of an evaporation chamber through a first preheater and a second preheater in sequence; the material outlet of the evaporation chamber is connected with the material inlets of a main heater and an auxiliary heater respectively through a forced circulating pump; the material outlets of the main heater and the auxiliary heater are connected with the material inlet of the evaporation chamber through the material adoption pipeline; one path of a preheating pipeline is connected with the first preheater through the condensed water outlet of a condensed water tank, and the other path of the preheating pipeline is connected with the second preheater through the condensed water outlet of the auxiliary heater; the secondary steam outlet of the evaporation chamber is connected with the gas inlet of a gas-liquid separator; the gas outlet of the gas-liquid separator is connected with the main heater through a steam compressor; the outlet of the main heater is connected with the inlet of the condensed water tank; the steam outlet of the condensed water tank is connected with the auxiliary heater through a vacuum pump. The atmospheric synergetic MVR energy saving unit can repeatedly use the secondary steam, so that the use amount of the steam is reduced by over 50 percent, the energy is saved to the extremely large extent, and the condensing efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of evaporators and belongs to the technical field of chemical equipment, in particular to an atmospheric pressure cooperative MVR energy-saving unit and an energy-saving process. Background technique [0002] In recent years, MVR units have been widely used in the field of chemical technology. Now most people still pay more attention to the selection of compressors when applying them, while ignoring the design of the entire evaporation system. A well-designed three-effect evaporator needs 40 equivalents of raw steam for every 100 equivalents of water evaporated, and the condensation efficiency is about 91%. Obviously, under the same heat exchange conditions, the steam condensation efficiency in the MVR unit is basically the same, or even lower. Therefore, the MVR evaporator under the general process will lose more than 9% of the latent heat of steam every cycle. Taking into account the additional energy ge...

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Problems solved by technology

Therefore, the MVR evaporator under the general process will lose more than 9% of the latent heat of steam every cycle

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