Fly ash water-elution desalination MVR evaporator is a device used for fly ash treatment and recycling, Kang Jinghui evaporator Xiaobian and talk about fly ash water-elution desalination MVR evaporator.
Fly ash water elution desalination equipment
Fly ash water-elution desalination MVR evaporator equipment is a "fly ash water-elution desalination (FWD) + cement kiln co-disposal" system, which can efficiently remove chloride ions in waste incineration fly ash, decompose the dioxins in the water-washed fly ash through the high-temperature alkaline environment of the cement kiln and no longer synthesize them twice, and at the same time solidify the heavy metals in the cement lattice and do not leach out in the environment. Kang Jinghui fly ash curing system can make hazardous waste fly ash (HW18) into cement clinker, sodium chloride and potassium chloride, and there is no pollutant discharge during the whole disposal process.
Source and characteristics of fly ash water
Incineration fly ash refers to the secondary pollution products of waste incineration. The annual production of fly ash is large, and the prospect of resource utilization is very good, but the composition of fly ash is complex, and the main hazardous substances are dioxins, chromium, arsenic, lead and other heavy metals, as well as soluble salts, which need to be pretreated for further resource utilization. However, the high concentration of inorganic chloride salts in fly ash will not only reduce the quality of the resourced product, but also destroy the production process.
Inorganic chloride salts can also adversely affect other technologies for fly ash disposal. Inorganic chloride salts can also be recycled, so it is very important to study the resource and harmless utilization of inorganic chloride salts in incineration fly ash.
At present, the more effective solution is the "fly ash washing process", the principle of which is that the chlorine in the fly ash of waste incineration can be removed by water washing, and the aluminum, silicon and calcium in the fly ash are retained as cement raw materials;
Fly ash water-elution desalination system
The fly ash water elution desalination system includes five systems, namely fly ash elution system, water purification system, evaporative salt production system, drying system and kiln system. The technology has been successfully applied to the large-scale disposal of fly ash, with a chlorine removal rate of more than 95%, which can be disposed of into industrial secondary by-product salt and cement clinker raw materials, and the whole process has no waste gas and wastewater discharge, and the resource, harmlessness and reduction of fly ash disposal have been fully realized.
The main function of the fly ash elution system is to separate the potassium, sodium, sulfur and chloride ions in the fly ash from the fly ash through the water washing process, so as to meet the requirements of fly ash densification This system adopts countercurrent rinsing technology, the fly ash slurry passes through the first stage of elution reactor and the elution separator after solid-liquid separation, the elution ash enters the next stage of the elution reactor for the second wash, and the eluent enters the water purification treatment system.
Fly ash water-elution desalination MVR evaporator
Fly ash water elution desalination MVR evaporator is mainly an evaporation salt system, the water after fly ash washing is high salt water, and the inlet water of evaporation crystallization is mainly NaCl and KCl, using mechanical compression evaporation technology, flash crystallization and recrystallization technology to realize the crystallization separation of industrial salt, realize the recycling of water, all the water obtained by evaporation crystallization is returned, the main components of the crystallized salt after water washing are sodium chloride and potassium chloride, and the salt produced is used as industrial salt.
Kang Jinghui mainly uses the MVR evaporation process to treat the high-salt water after fly ash washing. The fly ash water-elution desalination MVR evaporator can realize the resource utilization and reduction of wastewater treatment, and at the same time save costs for enterprises.