solution

solution Classification

Industrial waste heat recovery solutions

MOON-TECH fully leverages its technical and product advantages by utilizing a series of stable, mature, reliable, and advanced technologies and products to recover low-grade residual heat and waste heat from industrial production processes. This recovered energy is then upgraded to higher-grade energy for use in process production or urban district heating. On one hand, this approach reduces energy consumption per unit of product; on the other hand, it delivers significant economic and social benefits. It is widely applied in energy-intensive industries such as steel, chemical, building materials, electric power, petrochemical, non-ferrous metals, textiles, and light industry.

Heat pump distillation solutions

Traditional distillation solutions

Heat pump distillation solutions

case

At a certain refining and chemical plant, a distillation process is used to separate the components of the feed liquid. Originally, boiler steam was entirely used as the heat source for the reboiler. After the retrofit, an indirect heat pump distillation process was adopted. By recovering the heat from the overhead vapor and circulating it through the heat pump system, high-grade heat is delivered at the column bottom to the reboiler, effectively replacing the original steam heating and water cooling process.

The project uses oil-injected twin-screw compressor units, providing a total cooling capacity of 23.4 MW and a total heating capacity of 27.4 MW. Based on energy cost calculations, the system can save over 40 million RMB annually and reduce CO₂ emissions by 79,530 tons per year.

Other cases include the MTBE unit isobutane column retrofit, alkylation unit isobutane column retrofit, new maleic anhydride unit, depropanizer column retrofit of the gas separation unit, and solvent column retrofit of the polybutadiene rubber unit.

Low temperature process heat recovery case

Typical scenarios: distillation column overhead temperature exceeds 100°C (aromatic benzene column, solvent column, concentration column, stripping column, reaction heat recovery).

Acetic acid distillation column retrofit: low-grade heat from the column overhead is recovered to generate low-pressure steam, followed by mechanical vapor recompression. The system produces 4.3 tons of steam per hour, with a power consumption of 175 kWh per ton of steam. It achieves annual cost savings of 4.15 million RMB and reduces carbon emissions by 6,747 tons.

Condensate flash evaporation solution

Direct condensate flash (open system)
The flashed low-pressure steam is directly compressed and heated by a steam compressor unit, then delivered to steam-consuming processes.

Industrial waste heat recovery solutions7

Indirect condensate flash (closed system)
A heat pump unit is used to recover the residual heat from flash steam. The working fluid of the heat pump acts as the heat transfer medium, delivering heat to the heat-consuming end.

Segmented flash and multi-stage compression
Comprehensively considers three aspects: waste heat source (temperature and flow rate of condensate), heat demand side (steam pressure), and energy prices (electricity rates and steam cost).

Sewage heat pump system case

An oilfield enterprise in Northeast China uses 32°C wastewater from the industrial park as the heat source. Heat is extracted by heat pump units to produce 75°C high-temperature hot water at the terminal, which is used for crude oil pipeline tracing and district heating in winter. The total heating load reaches 7 MW, with a maximum comprehensive COP of 3.4. Based on the design conditions, using heat pump units instead of purchased steam can save approximately 2.7 million RMB per heating season and reduce CO₂ emissions by over 6,000 tons annually.