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A method and system for removing ammonia nitrogen and suspended solids in blast furnace dust collection wastewater

A technology for suspended solids and wastewater, applied in chemical instruments and methods, water pollutants, gaseous discharge wastewater treatment, etc., can solve the problems of blast furnace dust collection wastewater polluting the environment and other issues

Active Publication Date: 2021-04-13
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The present invention proposes for the first time a complete technical solution for removing ammonia nitrogen and suspended solids from blast furnace dust collection wastewater, and the system solves the problem of blast furnace dust collection wastewater polluting the environment. Therefore, the present invention belongs to the green and environmental protection production process system of iron and steel

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  • A method and system for removing ammonia nitrogen and suspended solids in blast furnace dust collection wastewater

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Such as figure 1 As shown, a system for removing ammonia nitrogen and suspended solids in blast furnace dust collection wastewater includes an inlet pump, agitation and sedimentation tank, primary lift pump, adsorption tower and drainage pump in sequence according to the flow direction of blast furnace dust collection wastewater; the agitation and sedimentation According to the flow direction of the blast furnace dust collection wastewater, the pool includes two parts: a stirring tank and an inclined tube sedimentation tank; the system for removing ammonia nitrogen and suspended solids in the blast furnace dust collection wastewater also includes a mixed liquid dosing tank, which is connected to the sedimentation stirring tank of the water inlet.

[0027] The water quality characteristics of the blast furnace dust collection wastewater: ammonia nitrogen 16mg / L, suspended solids 171mg / L.

[0028] The method for using the system to remove ammonia nitrogen and suspended s...

Embodiment 2

[0042] A system for removing ammonia nitrogen and suspended solids in blast furnace dust collection wastewater has the same structure as that of Example 1.

[0043] The water quality characteristics of the blast furnace dust collection wastewater: ammonia nitrogen 12mg / L, suspended solids 141mg / L.

[0044] The method for using the system to remove ammonia nitrogen and suspended solids in blast furnace dust collection wastewater includes the following steps:

[0045] (1) The blast furnace dust collection wastewater enters the stirring tank of the stirring sedimentation tank through the water inlet pump, and the modified fly ash mixture enters the stirring tank of the stirring sedimentation tank through the mixed solution dosing tank, and the blast furnace dust collection wastewater enters the stirring tank of the stirring sedimentation tank The residence time is 4 minutes, and then enters the inclined tube sedimentation tank for precipitation, and the precipitation time is 28 m...

Embodiment 3

[0058] Use the same system for removing ammonia nitrogen and suspended solids in blast furnace dust collection wastewater as in Example 1 to treat the same blast furnace dust collection wastewater as in Example 1: ammonia nitrogen 16mg / L, suspended solids 171mg / L.

[0059] The method for using the system to remove ammonia nitrogen and suspended solids in blast furnace dust collection wastewater includes the following steps:

[0060] (1) The blast furnace dust collection wastewater enters the stirring tank of the stirring sedimentation tank through the water inlet pump, and the fly ash mixed solution enters the stirring tank of the stirring sedimentation tank through the mixed solution dosing tank, and the blast furnace dust collection wastewater stays in the stirring tank The time is 5 minutes, and then enters the inclined tube sedimentation tank for sedimentation, and the sedimentation time is 25 minutes;

[0061] (2) The precipitated blast furnace dust collection wastewater ...

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Abstract

The invention provides a system for removing ammonia nitrogen and suspended matter in blast furnace dust collection wastewater and a method for removing ammonia nitrogen and suspended matter in blast furnace dust collection wastewater by using the system. The system for removing ammonia nitrogen and suspended solids in blast furnace dust collection wastewater includes water inlet pump, stirring sedimentation tank, primary lift pump, adsorption tower and drainage pump in sequence according to the flow direction of blast furnace dust collection wastewater; The flow direction of the dust collection wastewater includes two parts of the stirring tank and the inclined tube sedimentation tank in sequence; the system for removing ammonia nitrogen and suspended solids in the blast furnace dust collection wastewater also includes a mixed liquid dosing tank, which is connected to the water inlet of the sedimentation stirring tank end. The invention proposes for the first time a complete technical solution for removing ammonia nitrogen and suspended matter from blast furnace dust collection wastewater, and systematically solves the problem of blast furnace dust collection wastewater polluting the environment.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to a method and system for removing ammonia nitrogen and suspended matter in blast furnace dust collection wastewater. Background technique [0002] The iron and steel industry is an industry with high energy consumption, high resources, and high pollution. Its water consumption is huge, accounting for about 14% of the national industrial water consumption. [0003] In July 2005, the National Development and Reform Commission issued the "Iron and Steel Industry Development Policy", which put forward higher goals and more specific requirements for the iron and steel industry to develop circular economy, save energy and resources, and take the road of sustainable development. Under these conditions, low energy consumption, low pollution, and low emissions have become the needs of social development. [0004] The unit water consumption of my country's iron and stee...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/04C02F101/16C02F103/18
CPCC02F1/281C02F1/5236C02F2101/16C02F2103/18C02F2301/08
Inventor 杨倩宇李恩超王佼娇
Owner BAOSHAN IRON & STEEL CO LTD