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Method and equipment for removing organic chloride from wastewater

An organic chloride and wastewater technology, applied in chemical instruments and methods, chemical/physical processes, reduced water/sewage treatment, etc. Simple design and construction, favorable for particle settling and improved stability

Inactive Publication Date: 2006-07-19
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0030] (3) When metal particles are used as reducing agent or catalyst-loaded metal particles to treat organic chloride wastewater, when a fixed bed is used as a reactor, metal particles will agglomerate, precipitate, block, etc., resulting in a reduction or even disappearance of the treatment effect;
[0031] (4) When using a stirred bed to treat organic chloride wastewater, due to the high density of the metal particle reducing agent, the solid-liquid two-phase mixing is uneven, the effective phase boundary contact area is small, and the metal particles are easy to precipitate at the bottom of the reactor, resulting in a process failure. weak control

Method used

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  • Method and equipment for removing organic chloride from wastewater
  • Method and equipment for removing organic chloride from wastewater
  • Method and equipment for removing organic chloride from wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] The reducing agent is pure iron particles, and the catalyst is soluble sulfate with a particle size of 60 mesh. It is used to treat organic chlorine wastewater. A variable diameter fluidized bed is used. The diameter of the fluidized reaction section 11 is 2.40 meters, and the diameter of the sedimentation section 13 is 7.8 meters. The bottom of the equipment circulates water tangentially to form a swirling flow, and the fluid Reynolds number Re is 48500; the fluidization reaction section 11 forms a turbulent flow, and the fluid Reynolds number Re is 24500; the sedimentation section 13 is provided with a spiral inclined plate of a sedimentation separation member, and the fluid is an approximate layer flow, the fluid Reynolds number Re is 0.79. For every 1 ton of wastewater treated, 2kg iron powder and 0.2kg catalyst were added. Under the conditions of room temperature and atmospheric pressure, the concentration of carbon tetrachloride in the wastewater influent was 20mg / ...

Embodiment 2

[0075] Platinum is used as a catalyst, which is loaded on the surface of reducing agent iron particles, with a particle size of 40 mesh, to treat organic chlorine wastewater. A variable diameter fluidized bed is used. The diameter of the fluidized reaction section 11 is 1.40 meters, and the diameter of the sedimentation section 13 is 3.76 meters. The tangential circulating water at the bottom of the equipment forms a swirling flow, and the fluid Reynolds number Re is 26500; the fluidization reaction section 11 forms a turbulent flow, and the fluid Reynolds number Re is 6000; the sedimentation section 13 is provided with a precipitation separation member inclined plate, and the fluid is approximately laminar flow , the fluid Reynolds number Re is 0.37. For each 1 ton of wastewater treated, 1-2 kg of iron powder loaded with catalyst platinum was added. Under the conditions of room temperature and atmospheric pressure, the concentration of carbon tetrachloride in the wastewater in...

Embodiment 3

[0077] Palladium is used as a catalyst, which is loaded on the surface of iron particles to treat organic chlorine wastewater. The particle size is 30 meshes. A variable diameter fluidized bed is used. The diameter of the fluidized reaction section 11 is 0.70 meters, and the diameter of the sedimentation section 13 is 2.5 meters. The bottom of the equipment is tangentially circulated with water to form a swirling flow, and the fluid Reynolds number Re is 36500; the fluidization reaction section 11 forms turbulent flow, and the fluid Reynolds number Re is 21000; the sedimentation section 13 is provided with a spiral inclined plate of a sedimentation separation member, and the fluid is an approximate layer flow, the fluid Reynolds number Re is 0.98. For each 1 ton of wastewater treated, 0.5-2kg of iron powder loaded with catalyst palladium was added. Under the conditions of room temperature and atmospheric pressure, the concentration of vinyl chloride in the influent of the waste...

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Abstract

The invention discloses a method to remove the organic chloride in sewage, which comprises: feeding the sewage circulated and tangential to form swirl flow and raise; translating sewage into rising flow to fluidizing fully the solid reducer or solid particle of supported catalyst in reactor and make them contact with water; reducing the rising flow speed after crossing main reaction zone; changing the rising flow near laminar flow when entering deposition separation area, depositing the reacted reducer or particle to remove the objective material. This invention also provides the opposite device, which fits to high-density metal particle and sewage, and is adjustable and convenient to manage.

Description

technical field [0001] The invention relates to water pollution control and treatment technology, in particular to a method and equipment for removing organic chlorides in wastewater. Background technique [0002] Organic chlorides, also known as chlorinated organic compounds, are products in which one or several hydrogen atoms in aliphatic hydrocarbons, aromatic hydrocarbons and their derivatives are replaced by chlorine atoms. There are many kinds of them, including chlorinated aliphatic hydrocarbons, chlorine Chlorinated organic compounds such as aromatic hydrocarbons. There are many kinds of organic chlorides, and they are also important chemical raw materials, intermediates, organic solvents and products, so they are widely used in chemical, pharmaceutical, pesticide, tanning, machinery, wood preservation and other industries. Emissions, the use of pesticides and pesticides, and the combustion of chlorinated organic matter products enter the environment and become orga...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/70B01J8/24
Inventor 官宝红吴忠标孟亚锋
Owner ZHEJIANG UNIV
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