Coking wastewater purification device

• Main Author: JIA HUIPING
• Format: Patent
• Language: English
• Published: 10.06.2015
• Subjects: CHEMISTRY; COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM,CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THERARE-EARTH METALS; INORGANIC CHEMISTRY; METALLURGY; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

The utility model relates to a coking wastewater purification device which comprises a neutralizing tank, a temperature rise preheater, a tar recovery tower, a calcium oxide absorbing tower, a tar recovery tank, a calcium hydroxide thermal decomposition tower, a distilled water recovery tank and a calcium hydroxide storage tank. The neutralizing tank is respectively connected with the temperature rise preheater, a sewage pool and a calcium oxide storage bin; the temperature rise preheater is respectively connected with the distilled water recovery tank and the calcium oxide absorbing tower; the calcium oxide absorbing tower is respectively connected with the tar recovery tower, the calcium hydroxide thermal decomposition tower and the calcium hydroxide storage tank; the tar recovery tower is respectively connected with the tar recovery tank, an emptying system and a carbon dioxide storage tank; a calcium oxide recovery pipeline is arranged between the calcium hydroxide thermal decomposition tower and the calcium oxide absorbing tower; and a steam pipeline is arranged between the calcium hydroxide thermal decomposition tower and the temperature rise preheater. According to the purification device disclosed by the utility model, acidic materials in the coking wastewater is neutralized by virtue of the neutralizing tank by using calcium oxide, and the problems that the coking wastewater is difficultly treated, the treatment cost is high and the environment-friendly discharge requirement cannot be met are solved.