Refrigeration – Processes – Exchanging heat between plural systems – e.g. – disparate
Patent
1981-01-23
1984-03-20
King, Lloyd L.
Refrigeration
Processes
Exchanging heat between plural systems, e.g., disparate
622384, F25B 700
Patent
active
044373163
ABSTRACT:
Method and apparatus for recovery of waste heat from thermomechanical pulping systems and the like in which waste heat in the form of steam exhausted from the mechanical pulper and latency chest portions of the thermomechanical pulping system are respectively passed through first and second evaporators which increase the enthalpy of the working liquid. The working fluid outputted from the first evaporator passes through a first compressor to significantly increase both pressure and temperature and further increase enthalpy. The working fluid at the outlet of the first compressor then undergoes desuperheating within an intercooling tank. The liquid phase of the working fluid is passed from said tank to the inputs of both evaporators, while the vapor phase merges with the working fluid outputted from the second evaporator and enters a second compressor to undergo further increases in pressure and temperature. The working fluid emerges from the second compressor and is passed through a condenser where it transfers its heat energy to water passing through the condenser, which water is converted to steam at a pressure well in excess of atmospheric. The working liquid, in giving up its heat energy, is converted into the liquid phase and is passed to the intercooling tank which serves as a means to balance differences in the mass flow rate, temperature, pressure and enthalpy of the working fluids respectively passing through the first and second compressors, thereby allowing the first and second compressors to operate at different temperature and pressure levels although they are driven by a common prime mover. The waste heat recovery system produces extremely useful high pressure, high temperature steam, free of the impurities present in the steam vented by the thermal mechanical pulping system.
REFERENCES:
patent: 2933826 (1960-04-01), Justus
patent: 3259176 (1966-07-01), Rice et al.
patent: 3276516 (1966-10-01), Japhet
patent: 3394555 (1968-07-01), La Fleur
patent: 3511058 (1970-05-01), Becker
patent: 3861459 (1975-01-01), Koop
patent: 3875755 (1975-04-01), Anderson et al.
patent: 4026035 (1977-05-01), Dyer et al.
patent: 4033141 (1977-07-01), Gustafsson
patent: 4041724 (1977-08-01), Gustafsson
patent: 4091547 (1978-05-01), Leigh
patent: 4118934 (1978-10-01), Brola
patent: 4173125 (1979-11-01), Bradshaw
patent: 4226089 (1980-10-01), Barrow
patent: 4228660 (1980-10-01), Grenier
patent: 4292809 (1981-10-01), Bjorlund
"Improved Profitability of Thermomechanical Pulping Using Computer Control and Effective Heat Recovery", A. Metsavirta et al., Tappi, Jul. 1980, vol. 63, No. 7, pp. 37-41.
"New TMP Heat-Recovery System Lowers Energy Cost by up to 10%", V. Koponen, Pulp & Paper, Sep. 1978, pp. 142-146.
Dyer David
Wise James L.
King Lloyd L.
Technology Marketing Inc.
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