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Phenol-acetone wastewater evaporation desalting pretreatment process

A phenol acetone and pretreatment technology, which is applied in natural water treatment, heating water/sewage treatment, water/sludge/sewage treatment, etc., can solve problems such as tar plugging and system operation instability, and achieve load reduction, The effect of improving energy utilization and improving production efficiency

Active Publication Date: 2014-12-10
青岛国标环保有限公司
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Problems solved by technology

[0004] The purpose of the present invention is to provide a new pretreatment technology of phenol-acetone wastewater evaporation and desalination, rationally design the process flow and equipment selection, so as to solve the problem of unstable operation of the phenol-acetone wastewater evaporation and desalination device system and tar plugging

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  • Phenol-acetone wastewater evaporation desalting pretreatment process

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Embodiment

[0027] Such as figure 1The device used in the phenol-acetone wastewater evaporation desalination pretreatment process shown includes a first-effect evaporator 2, a second-effect evaporator 3, a third-effect evaporator 5 and a four-effect evaporator 7, wherein the second-effect evaporator 3 The tube-side outlets of the three-effect evaporator 5 and the four-effect evaporator 7 are respectively connected with the second-effect separation chamber 4, the third-effect separation chamber 6 and the four-effect separation chamber 8; the second-effect evaporator 3, the three-effect evaporator 5 and the four-effect The outlet at the bottom of the effect evaporator 7 is respectively connected with a two-effect circulation pump 21, a three-effect circulation pump 20 and a four-effect circulation pump 19, and the outlets of the two-effect circulation pump 21, the three-effect circulation pump 20 and the four-effect circulation pump 19 are connected with the two-effect circulation pump 19 re...

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Abstract

The invention relates to a phenol-acetone wastewater evaporation desalting pretreatment process. A process that a falling film evaporator and an OSLO evaporation crystallizer are combined is adopted, cross flow operation is adopted, and a solution is treated according to the following steps: preheating a raw material liquid through a condensate water preheater, passing through a two-effect falling film evaporator, passing through a three-effect falling film evaporator, passing through a four-effect film evaporator, passing through a one-effect OSLO evaporation crystallizer, discharging out concentrated crystal slurry, performing solid-liquid separation, feeding the mother liquid back to the one-effect OSLO evaporation crystallizer for further evaporation, and recycling the solid. The process is reasonable in design, and due to selection of process procedures and equipment, the problems that a phenol-acetone wastewater evaporation desalting device is instable in operation and tubes are blocked by tar are solved, and the production efficiency is improved.

Description

technical field [0001] The invention relates to a phenol-acetone wastewater evaporation desalination pretreatment process, which belongs to the technical field of wastewater treatment. Background technique [0002] Phenol acetone wastewater belongs to organic wastewater with high COD and high salt content. Na in phenol acetone production wastewater 2 SO 4 Extremely high content, instantaneous drainage of Na 2 SO 4 The content reaches 70,000ppm, and the average concentration can reach 42370ppm. After accounting, the final Na in the phenol acetone production wastewater 2 SO 4 The content can reach 45,000 to 50,000 ppm. For every 20 tons of tar-containing wastewater, about 10Kg of tar is produced, which is a bitumen-like substance with high viscosity and high concentration of organic matter, mainly including volatile phenol, cumene, phenol, and alcohols. [0003] In the currently used wastewater treatment process, there are the following deficiencies: (1) The wastewater c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/04C02F103/36
CPCY02A20/124
Inventor 丁曙东曲丽丽刘华
Owner 青岛国标环保有限公司
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