Desulfurization purification method of low-temperature sintering flue gas

A technology for low-temperature sintering and sintering flue gas, applied in chemical instruments and methods, separation methods, gas treatment, etc. The effect of low operating costs

Inactive Publication Date: 2021-01-12
JIANGSU FENGYE TECH ENVIRONMENTAL PROTECTION GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it does not carry out denitration treatment, the function is relatively single, and the treatment of flue gas is not thorough

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A method for desulfurization and purification of low-temperature sintering flue gas, mainly comprising the following steps:

[0024] (1) The sintering flue gas from the sintering machine is first passed into the electrostatic precipitator for purification, and then drawn out by the exhaust fan through the flue, and is sent to the heat exchanger after switching between the flue gas bypass baffle valve and the inlet baffle valve Increase the temperature, and the temperature of the low-temperature sintering flue gas after heating rises to above 110°C;

[0025] (2) The heated sintering flue gas is passed into the reaction kettle through the pipeline, and ozone is passed into, so that the flue gas and ozone react;

[0026] (3) The oxidized flue gas enters the desulfurization tower through the pipeline, and the flue gas enters the flue gas distributor at the top of the desulfurization tower. After the air flow is uniform, it contacts and reacts with the desulfurizer atomized ...

Embodiment 2

[0030] A method for desulfurization and purification of low-temperature sintering flue gas, mainly comprising the following steps:

[0031] (1) The sintering flue gas from the sintering machine is first passed into the electrostatic precipitator for purification, and then drawn out by the exhaust fan through the flue, and is sent to the heat exchanger after switching between the flue gas bypass baffle valve and the inlet baffle valve Increase the temperature, and the temperature of the low-temperature sintering flue gas after heating rises to above 110°C;

[0032] (2) The heated sintering flue gas is passed into the reaction kettle through the pipeline, and ozone is passed into, so that the flue gas and ozone react;

[0033] (3) The oxidized flue gas enters the desulfurization tower through the pipeline, and the flue gas enters the flue gas distributor at the top of the desulfurization tower. After the air flow is uniform, it contacts and reacts with the desulfurizer atomized ...

Embodiment 3

[0039] A method for desulfurization and purification of low-temperature sintering flue gas, mainly comprising the following steps:

[0040] (1) The sintering flue gas from the sintering machine is first passed into the electrostatic precipitator for purification, and then drawn out by the exhaust fan through the flue, and is sent to the heat exchanger after switching between the flue gas bypass baffle valve and the inlet baffle valve Increase the temperature, and the temperature of the low-temperature sintering flue gas after heating rises to above 110°C;

[0041] (2) The heated sintering flue gas is passed into the reaction kettle through the pipeline, and ozone is passed into, so that the flue gas and ozone react;

[0042] (3) The oxidized flue gas enters the desulfurization tower through the pipeline, and the flue gas enters the flue gas distributor at the top of the desulfurization tower. After the air flow is uniform, it contacts and reacts with the desulfurizer atomized ...

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PUM

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Abstract

The invention relates to a desulfurization purification method of low-temperature sintering flue gas. The method mainly comprises the following steps: (1) firstly introducing sintering flue gas from asintering machine into an electrostatic dust collector for purification, then leading out the sintering flue gas from an exhaust fan through a flue, and after switching of a flue gas bypass baffle valve and an inlet baffle valve, sending the sintering flue gas into a heat exchanger for heating; (2) introducing the heated sintering flue gas into a reaction kettle through a pipeline, and introducing ozone to enable the flue gas to react with the ozone; (3) enabling the oxidized flue gas to enter a desulfurizing tower through a pipeline, enabling the flue gas to enter a flue gas distributor at the top of the desulfurizing tower, carrying out gas flow homogenization, and then carrying out contact reaction with a desulfurizing agent atomized by an atomizer so that SO2 in the gas is absorbed and purified; (4) sinking part of the desulfurized and dried powder particles into the bottom of the desulfurizing tower, and transporting the powder particles out of the tank truck regularly; and the rest particles enter a denitration system along with the flue gas to be subjected to denitration treatment. According to the desulfurization purification method of the low-temperature sintering flue gas, the flue gas is treated cleanly and thoroughly.

Description

technical field [0001] The invention relates to the technical field of sintering flue gas purification, in particular to a method for desulfurization and purification of low-temperature sintering flue gas. Background technique [0002] The state has stepped up efforts to control sulfur dioxide and clearly requires desulfurization of sintering flue gas. At present, rotary spray drying desulfurization technology has been widely used in domestic sintering flue gas desulfurization field, and practice has proved that this desulfurization technology is mature and reliable. The rotary spray drying desulfurization process is as follows: after the electrostatic precipitator, the sintering raw flue gas at the outlet of the main exhaust fan is desulfurized and purified by the desulfurization tower and pulse bag filter, and then discharged by the booster fan through the chimney up to the standard. Generally speaking, the so-called sintering flue gas has a general SO2 concentration of 4...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/75B01D53/76B01D53/50B01D53/56B03C3/017
CPCB01D53/75B01D53/76B01D53/502B01D53/56B03C3/017B01D2251/104B01D2251/404B01D2258/0283
Inventor 张程钱玉成蒋峰朱军武
Owner JIANGSU FENGYE TECH ENVIRONMENTAL PROTECTION GRP CO LTD
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