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Wastewater treatment method and system

A wastewater treatment system and treatment method technology, applied in water/sewage treatment, heating water/sewage treatment, degassed water/sewage treatment, etc., can solve problems such as environmental pollution, soil and surface water, groundwater damage, etc., to improve Mass transfer heat transfer efficiency, avoid fouling blockage, avoid fouling effect

Active Publication Date: 2018-05-25
FUSHUN RES INST OF PETROLEUM & PETROCHEMICALS SINOPEC CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

If it is not treated before discharge, the high concentration of soluble inorganic salts and refractory toxic organic substances in wastewater will cause serious environmental pollution and cause damage to soil, surface water, and groundwater.

Method used

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  • Wastewater treatment method and system
  • Wastewater treatment method and system

Examples

Experimental program
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Effect test

Embodiment 1

[0075] use figure 1 The system, the evaporator adopts figure 2 In the device, the waste water used is FCC desulfurization waste water. The waste water mainly contains sodium sulfite, sodium sulfate and calcium carbonate salt. The salt concentration of the raw waste water is 6wt%, and the treatment capacity of the raw waste water is 30t / h. Preheating, the heater 4 is heated to 100° C., and enters the evaporator 5 . The compression ratio of the steam compressor 8 is 1.4, and nitrogen is used as supplementary non-condensable gas. The concentrated liquid 10 discharged from the bottom of the evaporator 5 is 16 wt%. After the concentrated liquid 10 is stripped and evaporated by the stripper 11, the concentrated liquid 17 discharged is 24 wt%. The temperature of the condensed water 21 after heat recovery is about 45°C, and the recovered condensed water is 16.6 t / h.

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Abstract

The invention provides a wastewater treatment method and system. The system comprises a wastewater preheater, a wastewater heater, an evaporator, a stripping tower, a vapor compressor, a heat exchanger, a non-condensable gas compressor and a condensed water collector. The invention further provides the wastewater treatment method adopting the system. The wastewater treatment method and system havethe advantages that safety and reliability are achieved, equipment is simple, operating cost is low, energy-saving effect is remarkable and the like, and 50%-95% of water resource can be recycled.

Description

technical field [0001] The invention relates to the technical field of environmental protection and energy saving, in particular to a method and a device for concentrating and treating waste water containing salt and high molecular organic matter. Background technique [0002] Highly saline wastewater refers to wastewater with a total saline mass fraction TDS ≥ 1%, which generally belongs to refractory wastewater. Common high-salinity wastewater mainly comes from wastewater discharged from seawater and industrial production wastewater. The desalination treatment methods of high-salt wastewater mainly include electrodialysis, reverse osmosis, ion exchange and evaporation. Organic wastewater mainly comes from chemical industry, road deicing, food processing and other fields, and also includes printing and dyeing wastewater, petroleum mining and processing wastewater, papermaking wastewater and pesticide industry wastewater. The total amount of high-salt organic wastewater is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/04C02F1/08C02F1/20
CPCC02F1/041C02F1/048C02F1/08C02F1/20
Inventor 王晶王海波廖昌建刘伟李经伟
Owner FUSHUN RES INST OF PETROLEUM & PETROCHEMICALS SINOPEC CORP
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