Let’s discuss the energy-saving technical improvement projects for our own installations
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Let me start by offering some initial ideas; on our end, we are working to reduce fuel gas consumption through energy savings in the heating furnaces. Energy savings are achieved in the first instance by using the condensed water at over 100 degrees Celsius coming from the flash tank – water that is normally cooled with water itself – to heat the air in the heater, thereby reducing the amount of fuel gas needed. Energy savings are achieved in the second instance by reducing the consumption of cooling water.
The condensed water is recycled as cooling water for machine pump seals; it does not cause scaling, thereby extending the operational life of the machine pumps.
Personally, I think it is better to control the steam flow, as it makes control easier; this device uses exactly this method. Heat exchange is controlled, and the area is unstable.
Steam condensate is recovered and utilized, while rainwater is collected for reuse
We’ve learned that here too, water is reused multiple times
The Endu grate ash handling system requires 30 tons of cooling water per hour; previously, integrated water was used. After cooling, it is directly discharged into the sedimentation tank. 2.5 yuan per ton of water, 75 yuan in losses per hour, resulting in 657,000 yuan in losses per year. Now, softened water is used; the cooled softened water from the ash discharge system enters the degassing tank and then goes into the boiler. Save 657,000 yuan per year.
Our factory has successfully utilized the waste heat boilers from sulfuric acid production to replace the steam generated by three coal-fired boilers for phosphoric ammonium production, saving 8,000 tons of standard coal per year.
Secondary waste heat utilization after steam use
The operating temperature of the pump is around 120°C, and its pump body cooler has been changed from using circulating water (hard water) to using chilled water (deionized water) for cooling, thereby reducing maintenance costs and the workload on workers.
Reply to 1# ccyzdd102: 1. The excess steam generated by the fluidized bed is sent to the bathhouse for heating. 2. The low-pressure steam from the separation workshop is used to heat the water entering the boiler
We generate high-pressure steam at 3.8 Mpa using blowers; previously this steam was depressurized before being used for gas production, but now a waste heat power generation system is in use, with the backpressure steam being utilized for gas production. Generate electricity and feed it into the grid.