Brief Introduction

       Landfill leachate refers to the water contained in the garbage itself, the rain, snow, and other water entering the landfill, after deducting the saturated water holding capacity of the garbage and the overburden, and the formation through the garbage layer and the overburden layer. A high-concentration organic wastewater. There is also the water leaking out of the accumulated garbage that is ready for incineration.

Process Flow

       For the garbage permeate solution, we use the MVR evaporator for processing. The leachate requires evaporation and concentration, and the device uses a falling film evaporator for evaporation and concentration. Because the leachate is corrosive, considering long-term operation, the flow parts are made of 316L stainless steel, and the rest are made of carbon steel.

一、Stock solution preparation system

       The leachate flows into the raw liquid pool, which plays the role of storing and regulating the raw liquid, and meets the continuous and stable operation of the wastewater evaporation treatment equipment. The raw liquid tank is equipped with a raw liquid lifting pump. The raw liquid lifting pump uniformly transports the waste water to the evaporation treatment system. The control valve after the raw liquid pump is adjusted to maintain the balance between the lifting volume of the raw liquid and the evaporation volume.

二、Secondary steam and compressed steam system

       After the raw steam is heated in the heating chamber until sufficient secondary steam is generated, the raw steam valve is closed. The secondary steam generated in the heating chamber of the falling film evaporator is compressed by the steam compressor to produce compressed steam with increased temperature and pressure. The compressed steam is distributed to the heating chamber of the falling film evaporator for heating. The condensed water formed by the heated compressed steam enters the preheater to preheat the raw liquid.

三、Material liquid system

       After being heated by the preheater, the leachate enters the falling film evaporator to evaporate and concentrate the rated volume, and then is discharged to the designated location by the discharge pump.

四、Accident and tank washing

       When an accident occurs in the system work and the tank is washed during operation, the feeding is first stopped, and the mother liquor in the evaporation equipment is drained. The tank washing water uses the water in the condensed water storage tank. After the tank washing is completed, the tank washing water is drained. The first tank washing water is drained into the original liquid tank. After the evaporation tank is empty, first part of the mother liquid is passed into the evaporation tank through the original liquid pump. The original liquid is added to the original liquid pump to make the liquid level in the evaporation tank meet the process requirements.