Combined heat recovery and make-up water heating system
A cogeneration plant is described comprising in combination: a first stage source of hot gas; a duct having an inlet for receiving the hot gas and an outlet stack open to the atmosphere; a second stage recovery heat steam generator including an evaporator situated in the duct, and economizer in the duct downstream of the evaporator, and steam drum fluidly connected to the evaporator and the economizer; feedwater supply means including a deaerator heater and feedwater pump for supplying deaerated feedwater to the steam drum through the economizer; makeup water supply means including a makeup pump for delivering makeup water to the deaerator heater; means fluidly connected to the steam drum for supplying auxiliary steam to the deaerator heater; and heat exchanger means located between the deaerator and the economizer, for transferring heat from the feedwater to the makeup water, thereby increasing the temperature of the makeup water delivered to the deaerator and decreasing the temperature of the feedwater delivered to the economizer, without fluid exchange.
- Assignee:
- Energy Services Inc., Farmington, CT
- Patent Number(s):
- US 4745757
- OSTI ID:
- 6844150
- 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
COGENERATION
DEAERATORS
DESIGN
DEUS
DUAL-PURPOSE POWER PLANTS
DUCTS
ENERGY SYSTEMS
ENERGY TRANSFER
EVAPORATORS
FEEDWATER
FLUID FLOW
GAS FLOW
HEAT TRANSFER
HEATERS
HYDROGEN COMPOUNDS
OXYGEN COMPOUNDS
POWER GENERATION
POWER PLANTS
PUMPS
STEAM GENERATION
WATER
WATER SUPPLY
WATER TREATMENT