| 况楠.蒸汽冷凝水潜热量引射回收应用实践[J].中国油脂,2021,46(12):149~155.[KUANG Nan.Application practice of latent heat recycle of steam condensate by using ejection method[J].China Oils and Fats,2021,46(12):149~155.] |
| 蒸汽冷凝水潜热量引射回收应用实践 |
| Application practice of latent heat recycle of steam condensate by using ejection method |
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| DOI： |
| 中文关键词: 蒸汽冷凝水 负压引射回收 闪蒸 热量回收 碳排放 |
| 英文关键词:steam condensate negative-pressure ejection recycle flash evaporation heat recycle carbon emission |
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| 摘要点击次数: 626 |
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| 中文摘要: |
| 传统蒸汽冷凝水热量回收一般采用间接换热、自然闪蒸等技术，热量回收效率低。对于油料压榨浸出工艺间接换热产生的高热值蒸汽冷凝水，采用负压引射技术回收其中的潜热量，即利用直接蒸汽汽源的剩余机械能作为驱动，通过可调节蒸汽喷射泵负压引射蒸汽冷凝水，使其在超低背压（0～0.02 MPa可调节）下充分闪蒸，释放全部潜热量并与直接蒸汽混合，作为蒸脱机直接蒸汽再次使用，从而在保证蒸汽品质（过热）的前提下，大幅减少蒸汽消耗，以最高的热效率（热量无损耗）实现冷凝水热量的梯次节能利用。以2条2 500 t/d大豆压榨浸出生产线为例，年节约蒸汽量大于15万t，同时减排等量废水、降低二氧化碳排放量，在提高节能回收效率和减少碳排放方面实现了创新突破。 |
| 英文摘要: |
| 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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