HEAT EXCHANGER

• Main Authors: NOBUSAWA YUICHIRO, TSUCHIYA KOREYA, SATO MINORU, HAZAMA MASABUMI
• Format: Patent
• Language: English; Japanese
• Published: 26.04.2018
• Subjects: BLASTING; CHEMISTRY; HEAT EXCHANGE IN GENERAL; HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS,IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT; HEATING; LIGHTING; MECHANICAL ENGINEERING; METALLURGY; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE; WEAPONS

PROBLEM TO BE SOLVED: To provide an anaerobic digester provided with a heat exchanger which heats sludge while suppressing a temperature rising width without impairing agitation ability of a sludge circulation path for agitation, and to provide the heat exchanger.SOLUTION: An anaerobic digester includes: an anaerobic digestion tank 1 which performs anaerobic digestion treatment of projected original sludge; a circulation pipe 2 which has a suction port 2a and a discharge port 2b opened in the digestion tank 1 and is elongated to a digestion tank 1 exterior; a circulation pump 3 which is provided on the circulation pipe 2 and transfers mixed sludge in the digestion tank 1; and a heat exchanger 4 which is provided on the circulation pipe 2 and heats the mixed sludge. The heat exchanger 4 includes an outer cylinder 41 through which the mixed sludge passes, a plurality of hollow heat exchanging members 42 provided in the outer cylinder 41 and a supply side outer covering member 43 which forms a heat medium supply chamber 43a for receiving heat medium. The heat exchanging member 42 and the heat medium supply chamber 43a are communicated with each other.SELECTED DRAWING: Figure 1 【課題】撹拌を目的とした汚泥循環路の撹拌能力を損なうことなく、昇温幅を抑えながら汚泥を加温する熱交換器を備えた嫌気性消化装置および熱交換器を提供する。【解決手段】嫌気性消化装置は、投入された原汚泥を嫌気性消化処理する嫌気性消化槽１、消化槽１内で開口する吸引口２ａと吐出口２ｂを有し、消化槽１外に延在する循環管２、循環管２に設けられ、消化槽１内の混合汚泥を移送する循環ポンプ３、および、循環管２に設けられ、混合汚泥を加温する熱交換器４を備えている。熱交換器４は、混合汚泥が通過する外筒４１と、外筒４１内に複数設けられた中空の熱交換部材４２と、熱媒体を受け入れる熱媒体供給室４３ａを形成する供給側外覆部材４３を備えている。熱交換部材４２と熱媒体供給室４３ａとは連通している。【選択図】図１