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Method and device for treating coking sewage with blast furnace slag

A technology for coking sewage and blast furnace slag, applied in chemical instruments and methods, combustion methods, natural water treatment, etc., can solve the problems of high water consumption for slag flushing, environmental pollution, and ineffective recycling, and achieve energy saving, emission reduction and The effect of controlling pollution and reducing pollution

Active Publication Date: 2018-10-23
SINOSTEEL ANSHAN RES INST OF THERMO ENERGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, iron and steel enterprises generally adopt water quenching method to process blast furnace slag. These water quenching methods not only consume high water consumption for flushing slag, but also fail to effectively recycle sensible heat, and also cause pollution to the environment.

Method used

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  • Method and device for treating coking sewage with blast furnace slag
  • Method and device for treating coking sewage with blast furnace slag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The method for treating coking sewage with blast furnace slag, the specific steps are as follows:

[0043] 1) The molten blast furnace slag with a temperature of 1450°C flows out of the blast furnace 1, flows into the carbonization chamber 3 through the slag ditch 2, and is broken into droplets with a diameter of 2 to 4 mm under the centrifugal action of a rotating speed of 1800 to 2000 rpm. After the coking sewage atomized from the atomizer 11 uniformly distributed on the side of the retort chamber 3 undergoes solidification and heat exchange, high-temperature slag particles at 800°C are formed to complete the first heat exchange;

[0044] 2) The 800°C high-temperature slag is introduced into the fixed bed 13, and the normal-temperature air blown out by the blower 14 is blown in from the bottom of the fixed bed 13, and after countercurrent heat exchange with the 800°C high-temperature slag, the preheated 600°C air passes through the preheated air pipe 10 is blown into ...

Embodiment 2

[0051] The method for treating coking sewage with blast furnace slag, the specific steps are as follows:

[0052] 1) The molten blast furnace slag with a temperature of 1550°C flows out of the blast furnace 1, flows into the carbonization chamber 3 through the slag ditch 2, and is broken into liquid droplets with a diameter of 2 to 4 mm under the centrifugal action of a rotating speed of 1800 to 2000 rpm. After the coking sewage atomized from the atomizer 11 uniformly distributed on the side of the retort chamber 3 undergoes solidification and heat exchange, high-temperature slag particles at 850°C are formed to complete the first heat exchange;

[0053] 2) The 850°C high-temperature slag is introduced into the fixed bed 13, and the normal-temperature air blown out by the blower 14 is blown in from the bottom of the fixed bed 13, and after countercurrent heat exchange with the 850°C high-temperature slag, the preheated 650°C air passes through the preheated air pipe 10 is blow...

Embodiment 3

[0060] The method for treating coking sewage with blast furnace slag, the specific steps are as follows:

[0061] 1) The molten blast furnace slag with a temperature of 1500°C flows out of the blast furnace 1, flows into the carbonization chamber 3 through the slag ditch 2, and is broken into droplets with a diameter of 2 to 4 mm under the centrifugation at a speed of 1800 to 2000 rpm. After the coking sewage atomized from the atomizer 11 evenly distributed on the side of the retort chamber 3 undergoes solidification and heat exchange, high-temperature slag particles at 750°C are formed to complete the first heat exchange;

[0062] 2) The 750°C high-temperature slag particles are introduced into the fixed bed 13, and the normal temperature air blown out by the blower 14 is blown in from the bottom of the fixed bed 13, and after countercurrent heat exchange with the 750°C high-temperature slag particles, the preheated 550°C air passes through the preheated air pipeline 10 is bl...

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Abstract

The invention relates to a method and device for treating coking sewage with blast furnace slag, including a slag ditch, a dry distillation chamber, a mixed gas pipeline, a burner, a chimney, an incineration chamber, an atomizer, a fixed bed, a vertical mill, and a radial heat pipe heat exchanger , the upper part of the retort chamber, the slag ditch, and the blast furnace are connected in sequence; the upper part of the retort chamber, the mixed gas pipeline, and the burner are connected; the side of the retort chamber, the atomizer, the coking sewage pipe, the booster pump, and the pretreatment chamber are connected in sequence; , fixed bed, and vertical mill are connected in sequence; burner, incineration chamber, high-temperature flue gas pipeline, radial heat pipe heat exchanger, and chimney are connected in sequence; one end of the preheating air pipeline is connected to the fixed bed, and the other end is connected to the burner. The advantages are: effective removal of pollutants in coking sewage, efficient recovery of high-temperature sensible heat of blast furnace slag, reduction of environmental pollution during its treatment, and treated coking sewage meeting discharge standards.

Description

technical field [0001] The invention belongs to the fields of coking sewage treatment and molten slag sensible heat recovery and utilization, and in particular relates to a coking sewage treatment and molten blast furnace slag sensible heat recovery and utilization method and device in iron and steel and nonferrous metallurgy industries. Background technique [0002] Coking sewage is high-concentration organic sewage produced in the process of coal coke, gas purification and coking product recovery. The main pollutants of coking sewage are: COD, BOD, cyanide, ammonia nitrogen, suspended solids, phenol and benzene compounds, etc. Sewage contains dozens of inorganic and organic compounds, among which inorganic compounds are mainly ammonium salts, sulfur, sulfide, cyanide, etc.; organic compounds include biphenyl, pyridine, indole, quinoline and other organic pollutants in addition to phenol things. [0003] At present, domestic coking wastewater treatment generally includes ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21B3/06C02F9/10F23G7/04C02F1/00C02F1/04C02F103/34
CPCC02F1/00C02F1/04C02F9/00C02F2103/34C21B3/06F23G7/04F23G2201/40F23G2206/203F23G2209/101Y02E20/12Y02W30/50
Inventor 李顺万雪李晓堂赵艳孟庆波谢国威
Owner SINOSTEEL ANSHAN RES INST OF THERMO ENERGY CO LTD