The calculation of the direct-flow vacuum evaporator doublecase SET

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Uploaded: 06.12.2011
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Description

Course project on the topic: Calculation of ramjet doublecase vacuum evaporator with external heating zone and forced circulation. Ufa 2005.

Introduction
The modern process of obtaining protein-vitamin concentrates (IOO) consists of the following stages: preparation of the culture medium and seed cultivation of yeast (fermentation), separation of the yeast slurry, evaporation yeast slurry, drying and packaging.
In this paper the process of evaporation of the yeast slurry. The yeast suspension is unusual solution, its evaporation must be performed at temperatures not exceeding 90-950S. Consequently, the pressure in the housing must be below atmospheric pressure. However, the yeast slurry tends to overcooking and foaming at the boil, so the evaporation is only two buildings, working on a once-through scheme.
In this paper the method of calculating doublecase ramjet vauum-evaporator with external heating zone and evaporation and forced circulation of the solution in the evaporator.
In this case, the only heat calculation evaporator. A verification calculations are performed in the normalization of the work of existing plants and to check the design flow and other parameters of the equipment.

Additional information

Contents

Introduction 3
Setting course for the implementation of the project
1. The calculation of the material balance evaporator 4
2 Thermal calculation evaporator heat balance and setup 5
2.1 Pre-load distribution body 7
2.2 Calculation of thermal losses and a boiling point of housings 8
2.3 Calculation of load towers evaporator method prof.I.A.Tischenko 11
2.4 Calculation of load towers evaporator with the heat loss method prof.G.N.Kostenko 12
2.5 Calculation of the heat transfer coefficients and heat transfer 13
2.6 Distribution of the total usable temperature difference between the buildings and the calculation of the heating surfaces 15
2.7 Heat balance setting 22
3 Constructive calculation buildings 25
3.1 Determination of the number of heating pipes 25
3.2 Placing tubes in tube plates and the calculation of the diameter of the heating chamber 26
3.3 Determination of the separation spaces 27
3.4 Calculation of diameters and pipe fittings 29
4 Calculation of barometric condenser 30
4.1 Cooling water consumption 30
4.2 Calculation of the diameter of the capacitor 31
4.3 Calculate the number of theoretical plates in the barometric condenser 32
4.4 Dimensions barometric tube 34
4.5 Calculation of exhaust air and the power consumed by the vacuum pump 35
5. Calculation of power circulation pumps 38
Conclusion 39
List of sources used 40
Appendix A 41
Appendix B 42

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