Flash evaporator

Abstract

The invention relates to a flash evaporator. The flash evaporator structurally comprises a water inlet, an upper end enclosure, a barrel, a first water spraying plate, a first flash evaporating chamber, a first steam outlet pipe, a second water spraying plate, a second flash evaporating chamber, a second steam outlet pipe, a third water spraying plate, a third flash evaporating chamber, a third steam outlet pipe, a lower end enclosure and a water outlet, wherein industrial waste hot water enters from a water inlet in the upper part of the flash evaporator, passes through the first water spraying plate and enters the first flash evaporating chamber, and generated flash steam flows out through the first steam outlet pipe; the residual waste hot water after flash evaporation downwards passesthrough the second water spraying plate and enters the second flash evaporating chamber, and the generated flash evaporation steam flows out through the second steam outlet pipe; and the residual waste hot water after flash evaporation downwards passes through the third water spraying plate and enters the third flash evaporating chamber, and the generated flash evaporation steam flows out throughthe third steam outlet pipe. The flash evaporator structurally further comprises a steam ejector; a driving steam inlet of the steam ejector is connected with a first steam outlet pipe with higher steam outlet pressure, and a steam suction port of the steam ejector is connected with a third steam outlet pipe with lower steam outlet pressure; and the steam ejector is capable of supplying steam withmedium pressure.

Description

technical field [0001] The invention relates to thermal technology, in particular to a flash evaporator. Background technique [0002] Soda flash evaporator is a device for heat recovery and utilization of high-temperature condensed water or industrial waste hot water. [0003] After the secondary steam is separated from the condensed water in the flash evaporator, it is used in the low-pressure steam heating system. Widely used in metallurgy, petrochemical, chemical, light industry, papermaking, food, brewing, beverage, pharmaceutical and other fields. [0004] Using industrial waste hot water to enter the multi-stage steam-water flash evaporator can obtain multiple streams of flash steam with different pressures and different temperatures, which can be used to heat buildings. At present, it has been widely used in steel and chemical enterprises. [0005] my country is a big country in steel production, and the annual output of steel accounts for 40% of the world's total ...

AI Technical Summary

Problems solved by technology

[0009] Use industrial waste hot water to enter the multi-stage steam-water flash evaporator to obtain multiple streams of flash steam with different pressures and different temperatures. When used to heat buildings, there is a problem: when the temperature of industrial waste hot water is relatively low, different temperatures generated by flash evaporation Among the multiple streams of flash steam, the temperature of one or two steam streams with lower temperature cannot meet the heating requirements, so they can only be discarded, or the temperature of the final discharge wastewater from flash evaporation can be increased, which reduces the total heat recovery

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