WATER TREATMENT APPARATUS AND OPERATION METHOD

• Main Authors: HIROTA TATSUYA, FUJITA HIROSHI
• Format: Patent
• Language: English; Japanese
• Published: 31.08.2022
• Subjects: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; METALLURGY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; THEIR RELEVANT APPARATUS; TRANSPORTING; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

To provide a water treatment apparatus using raw water for catalyst back washing and capable of sufficiently suppressing catalyst decay while reducing oxidant consumption.SOLUTION: A water treatment apparatus includes an oxidizer tank supplying an oxidant to raw water containing dissolved organic matter, a catalyst tank having a catalyst, a purification channel for raw water to pass downstream as purified water through the oxidizer tank and catalyst tank, and a backwash channel for water in the oxidizer tank to drain out through the catalyst tank. The water treatment apparatus also includes a circulation channel for water in the oxidizer tank to circulate between the oxidizer tank and the catalyst tank, a cleaning channel for water in the oxidizer tank to drain to the outside through the catalyst tank in the same direction as when purifying raw water, multiple switching valves which switch the settings of the purification channel, the backwash channel, the circulation channel, and the cleaning channel, and a pump installed in the backwash channel that pumps raw water.SELECTED DRAWING: Figure 1 【課題】触媒の逆洗に原水を用い、酸化剤の消費を抑えながらも、触媒の崩壊を十分に抑制し得る水処理装置を提供する。【解決手段】溶存有機物を含む原水に酸化剤を供給する酸化剤槽と、触媒を有する触媒槽と、原水が、酸化剤槽及び触媒槽を経由して浄水として下流側に通水されるように設定される浄化用流路と、酸化剤槽内の水が、触媒槽を経由して外部に排水されるように設定される逆洗用流路と、酸化剤槽内の水が、酸化剤槽と触媒槽との間を循環するように設定される循環用流路と、酸化剤槽内の水が、触媒槽内を原水の浄化時と同じ向きに通水されて外部に排水されるように設定される洗浄用流路と、浄化用流路と、逆洗用流路と、循環用流路と、洗浄用流路との設定を切り替える複数の切替弁と、逆洗用流路に設けられ、原水を送水するポンプとを備える水処理装置である。【選択図】図１