Double-effect evaporation final-effect vapour system

Abstract

The invention relates to a double-effect evaporation final-effect vapour system. According to the double-effect evaporation final-effect vapour system, a discharge pipe arranged on the lower part of a I-effect slurry flash chamber is communicated with a feed inlet of a I-effect slurry circulating pump; a vapour outlet pipe arranged on the top part of the I-effect slurry flash chamber is communicated with a vapour inlet of a final-effect slurry heater; a feed outlet of the I-effect slurry circulating pump is communicated with a feed inlet arranged on the lower part of a I-effect slurry heater; a discharge pipe arranged on the upper part of the I-effect slurry heater is communicated with a feed inlet of the I-effect slurry flash chamber; a liquor condensate pipe of the I-effect slurry heater is communicated with a I-effect liquor condensate collecting tank; a discharge pipe arranged on the lower part of a final-effect slurry flash chamber is communicated with a feed inlet of a final-effect slurry circulating pump; a feed outlet of the final-effect slurry circulating pump is communicated with a feed inlet arranged on the lower part of the final-effect slurry heater; a discharge pipe arranged on the upper part of the final-effect slurry heater is communicated with a feed inlet of the final-effect slurry flash chamber; and a liquor condensate pipe of the final-effect slurry heater is communicated with a final-effect liquor condensate collecting tank. Process flow is simple; automatic control is adopted; thermal energy of final-effect discharged vapour is used effectively; energy waste is reduced; no polluted water is generated; environmental pollution is avoided; production cost is reduced; and productivity is increased.

Description

technical field [0001] The invention relates to an ammonium phosphate-based production technology system, specifically a double-effect evaporation end-effect steam system. Background technique [0002] Evaporation is a unit operation that uses heating to heat a solution containing a non-volatile solute to a boiling state, so that part of the solvent is vaporized and removed, thereby increasing the concentration of the solute in the solvent. Double-effect evaporation is to carry out evaporation operation in two sets of evaporation units. The first set of evaporation unit uses new steam to pass into the shell side of the I-effect slurry heater to heat the slurry in the tube side, and from the I-effect slurry flash The secondary steam evaporated from the steam chamber enters the shell side of the final effect slurry heater of the second set of evaporation unit to heat the material in the tube side, that is, the secondary steam evaporated from the first set of evaporation unit...

AI Technical Summary

Problems solved by technology

The operation of this part of environmental protection facilities not only consumes kinetic energy, but also causes waste of available energy in water vapor at around 85°C. Cooling with cooling towers will cause environmental pollution such as water vapor flying, and repeated cycles will eventually be discharged, and the amount of sewage is large. The system cannot digest and absorb

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