The working principle of multi-effect falling film evaporator
Falling film evaporation is the material liquid from falling film
evaporator tube box on the heating chamber, the liquid distribution
and film forming device, even within the assigned to each heat
exchange tube, and uniform along the inner wall of the heat
exchange tube membrane. In the process of flow, by shell heating
medium heating evaporation process, the separation of the steam
produced from the liquid into the evaporator chamber, the vapour
liquid after the separation, the steam entering the condenser
condensate (single-effect operation) or into the next effect
evaporator as a heating medium, so as to realize multiple effect,
liquid discharge by the separation chamber.
The process flow falling film evaporator
Process with downstream (and flow), reverse flow, mixed flow (flow)
wrong advection four forms:
Downstream: solution and steam flow to the same, are made a work
flow to work at the end of the sequence. Raw material liquid pump
into a effect, relying on the effect, the pressure difference
between automatically into the next work, completed at the end of
the liquid from the effect (usually under the negative pressure
operation) with pumps. After due to the effect of the pressure is
low, the boiling point of solution is also low, the solution will
flash once effect after entering a valid part of the water, the
second or more steam, and due to the concentration of the
aftereffect from the previous high effect, low operation
temperature, often the first effect of the heat transfer
coefficient is higher than at the end of the effect a lot.
Downstream processes generally suitable for processing in the case
of high concentration for heat-sensitive materials.
Countercurrent: raw materials by the pump from effect in turn into
effect before, at the end of the completion fluid by a discharge,
feed liquid and steam reverse flow. Generally suitable for
processing large viscosity change with temperature and the
concentration of solution, not easy to deal with heat sensitive
Mixed flow: is the combination of suitable countercurrent process,
the advantages of both along the upstream avoid its shortcomings,
but complicated to operate, and requires high self-control.
Advection, every effect is charging a completion fluid, the effect
has crystallization precipitation, can timely fractional
crystallization, is commonly used in the evaporation of the
Multi-effect falling film evaporator on the principle of falling
film evaporation type heat the dilute solution boiling them part of
moisture evaporation and achieve the goal of concentrated solution.
The entire unit is continuous production process.
Multi-effect falling film evaporator is widely used in glucose,
starch sugar, oligosaccharides, malt sugar, sorbitol, fresh milk,
fruit juice, vitamin C, maltodextrin, etc. The concentration of
aqueous solution. And can be applied to the monosodium glutamate,
the treatment of waste liquid alcohol, fish meal, etc.
The equipment for continuous operation under the condition of
vacuum low temperature, high evaporation capacity, saving energy
and reducing consumption, low operation cost, materials can be
dealt with the most earth to keep the original color, aroma, taste
and ingredients. In food, medicine, food processing, beverage,
light industry, environmental protection, chemical industry and
many other industries are widely used.
TNJM03 type evaporator series (three-way) falling film evaporator
can be handled according to the different material to the
characteristics of the design into different technological process,
also can be equipped with automatic control system according to the
different requirements of customers.
Has a large enrichment ratio (1/5-1/5), viscosity range (< 400
cp), the heat transfer effect is good, the advantages of large
quantity, suitable for heat-sensitive, concentration is higher,
larger viscosity and corrosive materials evaporation, suitable for
corn starch industry pulp and table malt sugar juice, fruit juice
and food industry taste semen, liquid cream of dairy industry,
sugar juice sugar business worse filtrate concentration of alcohol
and alcohol industry.
There are multiple effect upstream and downstream, falling film
evaporator series equipment, corn starch, sugar juice fermentation,
juice, beverage industry, liquid cream, wine, pharmaceutical
industry, fermentation filtrate material liquid, high concentration
organic or chemical waste water evaporation and concentration of
the special equipment.
Energy saving, short heating time, apply to the evaporation of high
viscosity material, the enrichment and enr