Method for removing COD (Chemical Oxygen Demand), ammonia nitrogen and suspended matters in rainwater

A technology for suspended solids and rainwater, applied in chemical instruments and methods, water pollutants, runoff/rainwater treatment, etc., can solve problems that cannot be directly applied to iron and steel enterprises, and achieve good social and environmental benefits

Pending Publication Date: 2022-03-01
BAOSTEEL ZHANJIANG IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally, the industrial production of iron and steel enterprises requires COD to be lower than 15 mg/L, ammonia nitrogen to be lower than 0.1 mg/L, and suspended solids to be lower than 20 mg/L. However, aft

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  • Method for removing COD (Chemical Oxygen Demand), ammonia nitrogen and suspended matters in rainwater

Examples

Experimental program
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Example Embodiment

[0025] Example 1

[0026] Such as figure 1 As shown, a method of removing COD, ammonia nitrogen, and suspended matter in rainwater, including inlet pump 1, multilayer filter 2, and drain pump 7, the output of the water pump 1 and the input of the multilayer filter 2 pass The pipe connection, the output of the multilayer filter 2 and the input of the drain pump 7 are connected by a pipe, and the interior of the multilayer filter 2 is sequentially filled with a gravel layer 3, a modified iron slag layer 4, and modified Sexual groasy soil 5 and quartz sand layer 6, gravel layer 3, modified iron slag layer 4, modified uneven soil layer 5 and quartz sand layers respectively account for 4%, 50%, respectively, 5%, 50%, respectively, 42% and 4%, gravel apparent density of gravel layer 3 is 2510kg / m 3 The preparation process of modified scum in the modified iron residue layer 4 is as follows:

[0027] 1, the screened particle diameter is 200 mesh delags, the mass concentration is 13% of ...

Example Embodiment

[0035] Example 2

[0036] Such as figure 1 As shown, a method of removing COD, ammonia nitrogen, and suspended matter in rainwater, including inlet pump 1, multilayer filter 2, and drain pump 7, the output of the water pump 1 and the input of the multilayer filter 2 pass The pipe connection, the output of the multilayer filter 2 and the input of the drain pump 7 are connected by a pipe, and the interior of the multilayer filter 2 is sequentially filled with a gravel layer 3, a modified iron slag layer 4, and modified Severe-proof Soil 5 and Quartz Sand Layer 6, gravel layer 3, modified iron slag layer 4, modified uneven soil layer 5 and quartz sand layers each account for 2%, 48%, respectively, 4%, 48%, respectively, 48% and 2%, the gravel apparent density of gravel layer 3 is 2440kg / m 3 The preparation process of modified scum in the modified iron residue layer 4 is as follows:

[0037] 1, the screening of the particle diameter is 100 mesh delags, the mass concentration is 9% o...

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Abstract

The invention relates to the technical field of water treatment, and discloses a method for removing COD (chemical oxygen demand), ammonia nitrogen and suspended solids in rainwater, which comprises a water inlet pump, a multi-layer filter and a drainage pump, and the output end of the water inlet pump is connected with the input end of the multi-layer filter through a pipeline; the output end of the multi-layer filter is connected with the input end of the drainage pump through a pipeline, and the interior of the multi-layer filter is sequentially filled with a gravel layer, a modified iron slag layer, a modified attapulgite soil layer and a quartz sand layer from bottom to top; the method specifically comprises the following steps that rainwater enters the multi-layer filter through the water inlet pump; sequentially passing through a gravel layer, a modified iron slag layer, a modified attapulgite soil layer and a quartz sand layer; and finally, the rainwater treated by the multi-layer filter is pumped into an industrial water system of a steel mill through a drainage pump. The invention discloses a method for removing COD (Chemical Oxygen Demand), ammonia nitrogen and suspended matters in rainwater, which realizes the purpose of industrial reutilization of rainwater and belongs to a green low-carbon production process.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a method for removing COD, ammonia nitrogen and suspended matter in rainwater. Background technique [0002] Rainwater collection and reuse is a green and low-carbon implementation method for industrial enterprises. Domestic iron and steel enterprises have certain indicators for COD, ammonia nitrogen and suspended solids in industrial production water. Only by removing pollutants such as COD, ammonia nitrogen and suspended solids in rainwater can rainwater Can be applied to iron and steel enterprises. Generally, the industrial production of iron and steel enterprises requires COD to be lower than 15 mg / L, ammonia nitrogen to be lower than 0.1 mg / L, and suspended solids to be lower than 20 mg / L. However, after rainwater collection, COD, ammonia nitrogen, and suspended solids in rainwater have not been removed or Reduced to qualified standards, so it cannot be directly app...

Claims

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Application Information

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IPC IPC(8): C02F9/02B01J20/24B01J20/30C02F101/16
CPCC02F1/001C02F1/288B01J20/12B01J20/24C02F2101/16C02F2103/001
Inventor 王湘韦晶晶李恩超郭军陈欣
Owner BAOSTEEL ZHANJIANG IRON & STEEL CO LTD
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