Factory price multi effect MVR evaporation for Dye Wastewater Ammonium Sulfate
Multiple effect evaporator
multiple effect evaporator contains of single-effect, dual-effect and triple-effect evaporators, single-effect, dual-effect and triple-effect separators, preheater, condenser and hot pressure pump.
(A) Low evaporation consumption, 1Kg steam can evaporate 3.5Kg water.
(B) Low evaporation temperature. Part of twice steam can be inhaled into single-effect heater through spray type hot pressure pump. The high quality evaporation can be fully used and the evaporation temperature is low.
(C) Large concentration ratio with downward film type evaporation, which can make material liquid with viscosity be so easy to flow and evaporate, Hard to agglomerate with short concentration time. The concentration ratio can reach 1:5.
(D) The equipment can realize automatic production, intellectual system.
Functioning
The vapour supplied during the first effect produces the vapour at a lower pressure. These vapours are then used in a second effect as a vapour heating steam.
The number of effects vary and can go right up to 8. The number of effects is chosen according to the investment and operating cost.
The vapours at the outlet of the last effect should be condensed.
Example Parallel flow principle
The solution enters the evaporator circuit of the first stage. Here it mixes with the circulated solution and is heated in heater H with steam. In the evaporator V1, solvent (water) evaporates while cooling the solution to the boiling temperature. The solution then flows to the second stage, which is operated under reduced pressure and thus at a lower temperature. The vapour generated in the first stage is used as a heating medium for evaporation of the solution in the second stage. This process can be repeated several times depending on the boiling point elevation of the solution and existing frame conditions. The vapour of the last stage is condensed via cooling water. If salt shall be crystallized in the plant, further evaporation concentrates the solution to such an extent that crystals are formed. If desired, the crystals in the suspension can then be separated from the solution and dried.
Suitable for any type of evaporator
The multiple effect evaporator can be made up of falling film, forced or flash-cooling circulation evaporators.
Application
This technology is great when the cost of vapour is low.
Major Advantages of Multi-effect systems:
Ability to maximize usage of input energy (steam economy)
Reduced energy required to run full system
Reduced condensing load with additional effects (less cooling water needed)
Liquor flow control
Convenient foul condensate collection and processing
Ability to do online cleaning of individual effects
Maximum thermal efficiency with concurrent flow option
Technical parameters of falling film evaporator
| Type | Single effect | Double effect | Three effect |
| Evaporative capacity (kg/h) | 300-2000 | 1200-4000 | 3600-15000 |
| Feeding material density % | According to material | ||
| Discharge material density % | According to material | ||
| Steam pressure | 0.5-0.8 | ||
| Steam consumption / Evaporative capacity(with heat pressure pump) | 0.65 | 0.38 | 0.28 |
| Evaporating temperature | 45-90 | ||
| Sterilizing temperature | 90-110 | ||
| Cooling water consumption / Evaporative capacity (inlet 20°C, outlet 40°C) | 28 | 11 | 8 |
| Note: we can design custom product according customer's requirement. | |||
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