Treatment method of low-temperature evaporation high-concentration sewage

A treatment method, low-temperature evaporation technology, applied in the field of water treatment, can solve problems such as pollution and threats to drinking water safety, achieve high evaporation efficiency, low content of harmful substances, and improve evaporation efficiency

Active Publication Date: 2014-06-11
湖南北控威保特环境科技股份有限公司
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

Sampling surveys show that less than 20% of sanitary landfills can discharge solid waste in accordance with the (GB16889-2008) standard. Groundwater, soil, and rivers cause serious pollution, and directly threaten the safety of drinking water

Method used

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  • Treatment method of low-temperature evaporation high-concentration sewage
  • Treatment method of low-temperature evaporation high-concentration sewage
  • Treatment method of low-temperature evaporation high-concentration sewage

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Embodiment

[0038] A treatment method for low-temperature evaporation of high-concentration sewage according to the present invention. The high-concentration sewage in this embodiment is mainly aimed at low-temperature evaporation of landfill leachate concentrate. The treatment method will use a method such as Figure 1 to Figure 5 The supporting processing device shown, the processing device includes a concentrated liquid preheating assembly, an air preheating assembly, a low-temperature plate evaporator 1 and a recovery assembly, and the concentrated liquid preheating assembly and the air preheating assembly are connected to the low temperature plate evaporating device 1 respectively. The concentrated liquid inlet port 11 and the hot air inlet port 12, the recovery component communicates with the bottom of the cryogenic plate evaporator 1 through a hot air diverter valve 63 and a diverter pipe to form a circulation.

[0039] Such as Figure 2 ~ Figure 4 As shown, the low-temperature pla...

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Abstract

The invention discloses a treatment method of low-temperature evaporation high-concentration sewage. The method comprises the following steps: feeding the preheated hot air to a hot air inlet end of a low-temperature plate evaporator; feeding the preheated sewage to a sewage inlet end of the low-temperature plate evaporator, wherein the low-temperature plate evaporator is mainly formed by a plurality of layers of evaporation plates in a stacking manner; the sewage entering inside a flow control component forms a continuous laminar liquid film from top to bottom through the flow control component; the hot air entering an air pre-heating component forms a continuous ascend airflow from bottom to top, so that the continuous ascend airflow and the continuous laminar liquid film are subjected to countercurrent contact; saturated steam is finally formed by the continuous ascend airflow through the multi-layer evaporation plate, so that the saturated steam is discharged through a hot air outlet at the top; the continuous laminar liquid film is separated out in a form of a crystal substance after being fully evaporated, the un-evaporated sewage is discharged from a sewage outlet at the bottom. Thus, the treatment method disclosed by the invention is small in investment, good in treatment effect, low in energy consumption, green and environmentally friendly.

Description

technical field [0001] The invention relates to a water treatment method, in particular to a treatment method which is especially suitable for high-concentration sewage such as urban domestic garbage leachate. Background technique [0002] At present, there are two main technical paths for domestic waste leachate treatment in my country, namely, disc tube reverse osmosis (DTRO) technology and "anaerobic + aerobic + MBR + NF / RO" combined technology. The core of these two technologies is membrane treatment. The concentrate produced after membrane treatment is a high-concentration pollutant, and its output is about 30% of the total leachate treated. The pollutants in the concentrate are not only high in concentration, but also complex in composition and difficult to dispose of. It is still a world-class problem at present. If it is recycled to the landfill, it will have a certain effect at the beginning, but the long-term accumulation will lead to the enrichment of COD and sal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/04
CPCY02W10/37
Inventor 高青松舒淼曾露刘阳彭胜
Owner 湖南北控威保特环境科技股份有限公司
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