Low-pressure flash evaporation black water waste heat recovery device

Abstract

The utility model discloses a low-pressure flash evaporation black water waste heat recovery device which comprises a first-stage low-flash black water heat extraction unit and a second-stage low-flash black water heat extraction unit which are communicated through flow channels and connected in series in a grading mode, and a plurality of black water flow channels and secondary water channels are arranged in the first-stage low-flash black water heat extraction unit and the second-stage low-flash black water heat extraction unit, the first-stage low-flash black water heat removal unit and the second-stage low-flash black water heat removal unit are both provided with transition headers and distribution headers, the transition headers and the distribution headers are both internally provided with material accumulation prevention parts, and the distribution headers are further communicated with a backwashing device and a secondary water connector; the multi-stage waste heat recovery structure is arranged, the structure is reasonable, leakage is prevented, and meanwhile the waste heat recovery efficiency can be effectively improved; traditional right-angle baffling is optimized into smooth transition, the viscous flow space is effectively reduced and eliminated, solid-phase medium accumulation is prevented, and the excellent anti-blocking effect is achieved; and the transition header and the distribution header are detachably and separately designed, so that the maintenance of production personnel is facilitated.

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