Domestic waste water concentrated liquid full quantitative treatment project case

Basic information about the project
Project name: Huilai domestic waste sewage concentrated liquid full quantitative treatment project
Treatment scale: 200T/D (based on water intake)
Process requirements: This project adopts the designed treatment process "pretreatment system +MVR evaporation system + water production guarantee system" to fully quantify the sewage treatment, the daily treatment water intake of 200 tons/day, and the amount of dried mud salt should not exceed 8% of the water intake.
Responsible for the full quantitative treatment of concentrated sewage: Party B shall be responsible for the design, manufacture, supply, transportation, installation, commissioning, operation, lightning protection and grounding, and lighting in the boundary area of the entire concentrated liquid system (process, civil construction, equipment, piping, control, pump set, valves, instruments, steel structure, insulation and circulating cooling water system). Equipment withdrawal after the expiration of operation (ownership of the fully quantified equipment belongs to Party B)
Effluent water quality shall be strictly implemented in accordance with the discharge standards of Domestic Waste Landfill Pollutants Control Standard (GB16889-2008) and the Water Quality of Urban Waste Water Recycling and Utilization (GB-T18920-2002).

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.