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| Application practice of latent heat recycle of steam condensate by using ejection method |
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| KeyWord:steam condensate negative-pressure ejection recycle flash evaporation heat recycle carbon emission |
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| Abstract: |
| The traditional methods of steam condensate energy recycle are natural flash evaporation, indirect heat exchange, etc. The energy cannot be recycled completely by using these methods. For high calorific value steam condensate produced by indirect heat exchange in oil press and leaching process, the negative-pressure ejection method could be used to recycle the latent heat in the steam condensate. Specificly, the remaining mechanical energy of steam sources could be utilized directly. The adjustable steam injection pump was used to conduct negative-pressure ejecting, and proceed the flash evaporating completely under the super backpressure condition（0-0.02 MPa, adjustable）. The entire latent heat was released and combined with steam sources, and used as the direct steam sources for the desolventizer toaster. On the premise of ensuring steam quality (superheated steam), this step could decrease the consumption of steam source obviously, and implement the stepped energy conservation of condensate energy with the maximum efficiency. Taking two 2 500 t/d soybean press and leaching production lines as examples, the annual steam saving was more than 15 000 t, and the same amount of wastewater was reduced, and the CO2 emission was also reduced. An innovative breakthrough had been achieved in improving energy conservation recovery efficiency and reducing carbon emission. |
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