MVR forced cycle evaporation concentration project case

Basic information about the project
Project name: Mengzi Municipal landfill leachate full quantitative treatment project
Project requirements: Technical upgrading or replacement of new equipment for the original system of the leachate treatment station of Mengzi Municipal solid waste landfill, as well as operation and maintenance. The treatment scale shall be no less than 200m³/d. During the operation and service period, the daily average standard aquatic water output rate of the treatment facility shall be 100% of the treatment scale (calculated in monthly terms), and the water production rate shall be ≥ 97%.
Quality requirements: In line with the current national, provincial and local relevant standards, codes and regulations, the use of fully quantified treatment process, no concentrated liquid generation, the effluent meets the "domestic waste Landfill Pollution Control Standards" (GB16889-2008) Table 2 standards.

Process flow

Process characteristics

• 1. Process principle

MVR is short for mechanical vapor recompression technology. The MVR evaporator is an energy-saving technology that reuses the energy of the secondary steam generated by itself, thereby reducing the need for external energy.
The mechanical compressor (or fan) is used to re-compress the secondary steam after evaporation to increase its enthalpy value, and the secondary steam after the enthalpy is re-sent to the heating chamber as a heat source to heat the feed, and the heat transfer phase change becomes condensate water discharge. The heated material is vaporized and concentrated as the final product discharge system.

• 2. Features

(1) MVR energy-saving evaporator only needs a very small amount of steam, greatly reducing operating costs and reducing environmental pollution. No waste heat steam discharge, energy saving effect is very significant.
(2) Due to the use of compressor to provide heat source, compared with the traditional evaporator, the temperature difference is much smaller, can achieve mild evaporation, greatly improve product quality, reduce scaling.
(3) The structure and process are very simple, fully automatic operation, continuous operation, safe and reliable.
(4) The equipment is equipped with CIP cleaning pipeline, which can realize on-site cleaning, and the whole equipment is convenient to operate and has no dead corners. No waste heat steam discharge, energy saving effect is very significant.
(5) Where single-effect and multi-effect evaporator applicable materials, are suitable for the use of MVR evaporator, in technology has a complete substitutable, and has better environmental protection and energy saving characteristics.