Novel comprehensive treatment system and method for sewage with zero-pollution discharge

A comprehensive treatment and zero-pollution technology, applied in water/sludge/sewage treatment, water/sewage multi-stage treatment, general water supply conservation, etc., can solve the problems of secondary pollution, secondary pollution, and high cost of organic wastewater treatment , to achieve the effect of pollution discharge, zero pollution discharge and cost saving

Inactive Publication Date: 2016-08-17
王冰
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the high cost of membrane products, short service life, susceptibility to pollution, secondary pollution caused by incomplete treatment, etc., this technology faces obstacles in the development process and difficult problems in popularization and application.
Generally speaking, the main problems in the current sewage treatment technology are: (1) Different types of treatment methods are required according to the types of wastewater and water quality characteristics; (2) The economic value of recovery in the process is not high, resulting in waste of resources and energy. Waste; (3) Sewage, especially some refractory organic wastewater, is very expensive to treat; (4) Incomplete treatment will cause secondary pollution

Method used

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  • Novel comprehensive treatment system and method for sewage with zero-pollution discharge
  • Novel comprehensive treatment system and method for sewage with zero-pollution discharge

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Effect test

Embodiment 1

[0038] A new zero-pollution discharge sewage comprehensive treatment system, including the following units:

[0039] (1) Sewage Concentration Unit: Including Pretreatment System, Membrane Filtration System, Membrane Concentration System, Grinding System, and Homogenization System. The inlet of the sewage delivery system of the supercritical water oxidation unit is connected. In addition, the pretreatment system and the membrane filtration system are respectively connected with the crushing and grinding system, and the crushing and grinding system is connected with the homogeneous system.

[0040] The pretreatment system can use grids and flotation cells.

[0041] The membrane filtration system adopts microfiltration / ultrafiltration membrane filtration equipment.

[0042] The membrane concentration system adopts nanofiltration / reverse osmosis membrane filtration equipment.

[0043] The crushing and grinding system adopts a wet vertical ball mill.

[0044] The homogenization ...

Embodiment 2

[0066] A new zero-pollution discharge sewage comprehensive treatment method, comprising the following steps:

[0067] (1) Pretreatment: The pretreatment system of the sewage influent uses physical and chemical methods to remove organic matter, inorganic particles and floating objects that are harmful to the membrane in the water, and adjusts the influent water volume and pH value. The pretreatment method of step (1) is the combination of acid-base neutralization method and chemical precipitation method.

[0068] (2) Membrane filtration: The pretreated water passes through the membrane filtration system using microfiltration / ultrafiltration membrane filtration technology to remove microorganisms in water, separate macromolecules, colloids, proteins and suspended particles in the solution, and improve the recovery rate of purified water. More than 80%.

[0069] (3) Membrane concentration: After membrane filtration, the membrane concentration system uses nanofiltration / reverse o...

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Abstract

The invention relates to a novel comprehensive treatment system for sewage with zero-pollution discharge. The system comprises the following units: a sewage condensation unit, which comprises a pretreatment system, a membrane filtration system, a membrane condensation system, a crushing and grinding system, and a homogenization system; a supercritical water oxidation unit, which comprises an oxygen conveying system, a sewage conveying system, a supercritical water oxidation (SCWO) reactor, a gas-solid separation system, a gas-liquid separation system, a CO2 liquefaction system, and an oxygen-enriched air reuse system; and an effluent membrane condensation unit, which comprises a membrane condensation system. The invention also comprises a novel comprehensive treatment method for sewage with zero-pollution discharge. The system and the method are suitable for sewage treatment, and is used for treatment of sludge, straw and other solid wastes at the same time; after treatment, the products comprises carbon dioxide, water and inorganic salt, and secondary pollution is not generated; heat generated in the process satisfies heat used for the system, and excess heat is used for heating, cooling and generating electricity; recovery of carbon dioxide and reuse of oxygen-enriched air can further save cost and enlarge profit.

Description

technical field [0001] The invention belongs to the fields of sewage treatment and resource energy recycling, and in particular relates to a novel zero-pollution discharge sewage comprehensive treatment system and method. Background technique [0002] Traditional sewage treatment technologies include: physical and chemical treatment technology, chemical treatment technology and biological treatment technology. Physicochemical method is often used as a pretreatment method for sewage treatment; chemical treatment technology is often used as a pretreatment method for biochemical treatment; the more commonly used treatment methods are basically biological methods, but the removal of refractory organic matter and water body Eutrophication, high-concentration and high-COD industrial wastewater, and the treatment of slightly polluted water sources are all problems that biological treatment technologies have faced. In recent years, membrane bioreactor and reverse osmosis have been ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F9/06F25J3/02
CPCY02A20/131
Inventor 王冰马英霞郭仕鹏
Owner 王冰
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