Method and apparatus for recovering waste energy
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 outputterd 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.
- Assignee:
- TechMark Corp.
- Patent Number(s):
- US 4522035
- OSTI ID:
- 6326196
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
320304* -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Waste Heat Recovery & Utilization
COEFFICIENT OF PERFORMANCE
COMPRESSORS
DISPERSIONS
DRYERS
ENTHALPY
EQUIPMENT
EVAPORATORS
FLUIDS
HEAT RECOVERY EQUIPMENT
INDUSTRIAL PLANTS
INDUSTRY
MECHANICS
MIXTURES
PAPER INDUSTRY
PHYSICAL PROPERTIES
SLURRIES
STEAM GENERATION
SUSPENSIONS
THERMODYNAMIC PROPERTIES
WASTE HEAT UTILIZATION
WASTE PRODUCT UTILIZATION
WOOD PRODUCTS INDUSTRY
WORKING FLUIDS