Method for separating particulate matter, sulfur vapor and sulfur dioxide in smoke and application of method

A sulfur dioxide and sulfur vapor technology, applied in separation methods, dispersed particle filtration, chemical instruments and methods, etc., can solve problems such as poor economy, complex process, ineffective separation, etc., and achieve reduced energy consumption, simple process, and low filtration pressure. Effect

Pending Publication Date: 2017-12-01
CHENGDU INTERMENT TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] The main purpose of the present invention is to provide a method for separating particulate matter, sulfur vapor and sulfur dioxide in flue gas and its application, so as to

Method used

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  • Method for separating particulate matter, sulfur vapor and sulfur dioxide in smoke and application of method
  • Method for separating particulate matter, sulfur vapor and sulfur dioxide in smoke and application of method

Examples

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Effect test

Embodiment 1

[0045] Such as figure 2 Shown, the method for particulate matter, sulfur vapor and sulfur dioxide in the separation flue gas of the present invention comprises the following steps:

[0046] 1) Using the heat recovery device 4 to reduce the temperature of the flue gas to 350° C., wherein the flue gas is a gas composed of particulate matter, sulfur vapor and sulfur dioxide produced by the reaction of sulfur vapor and phosphogypsum;

[0047] 2) Use the membrane filter 1 to filter the cooled flue gas, the filtering temperature is 300°C, and the filtering wind speed is 0.5m / min; the particulate matter in the flue gas is intercepted by the filter medium of the membrane filter 1, The flue gas passes through the filter medium of the membrane filter 1 to obtain the first flue gas; the material of the filter medium is an intermetallic compound, the pore size is 10 μm, and the gas flux is 300 m 3 / m 2 kPa h;

[0048] 3) The first flue gas passes through a condenser 2 with a condensat...

Embodiment 2

[0051] Such as figure 2 Shown, the method for particulate matter, sulfur vapor and sulfur dioxide in the separation flue gas of the present invention comprises the following steps:

[0052] 1) Using the heat recovery device 4 to reduce the temperature of the flue gas to 400° C., wherein the flue gas is a gas composed of particulate matter, sulfur vapor and sulfur dioxide produced by the reaction of excess sulfur vapor and phosphogypsum;

[0053] 2) Use the membrane filter 1 to filter the cooled flue gas, the filtration temperature is 350°C, and the filtration wind speed is 0.9m / min; the particulate matter in the flue gas is intercepted by the filter medium of the membrane filter 1, The flue gas passes through the filter medium of the membrane filter 1 to obtain the first flue gas; the material of the filter medium is an intermetallic compound, the pore size is 15 μm, and the gas flux is 480 m 3 / m 2 kPa h;

[0054] 3) The first flue gas is passed through a condenser 2 with...

Embodiment 3

[0057] Such as figure 2 Shown, the method for particulate matter, sulfur vapor and sulfur dioxide in the separation flue gas of the present invention comprises the following steps:

[0058] 1) Using the heat recovery device 4 to reduce the temperature of the flue gas to 450° C., wherein the flue gas is a gas composed of particulate matter, sulfur vapor and sulfur dioxide produced by the reaction of excess sulfur vapor and phosphogypsum;

[0059] 2) Use the membrane filter 1 to filter the cooled flue gas, the filtration temperature is 400°C, and the filtration wind speed is 1.3m / min; the particulate matter in the flue gas is intercepted by the filter medium of the membrane filter 1, The flue gas passes through the filter medium of the membrane filter 1 to obtain the first flue gas; the material of the filter medium is an intermetallic compound, the pore size is 20 μm, and the gas flux is 570 m 3 / m 2 kPa h;

[0060] 3) Make the first flue gas pass through a condenser 2 with...

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Abstract

The invention discloses a method for separating particulate matter, sulfur vapor and sulfur dioxide in smoke. The smoke is gas which is produced by a byproduct, calcium sulfate, in decomposition of gypsum with sulfur and comprises particulate matter, sulfur vapor and sulfur dioxide. The method comprises steps as follows: 1) a membrane filter is used for filtering the smoke at the temperature higher than or equal to 300 DEG C at the filtering air speed of 0.5-2.0 m/min; the particulate matter in the smoke is intercepted by a filtering medium of the membrane filter, the smoke penetrates through the filtering medium of the membrane filter, first smoke is obtained, and the dust content of the first smoke is lower than or equal to 10 mg/Nm<3>; 2) the first smoke flows through a condenser at the condensation temperature of 100-200 DEG C, the sulfur vapor is condensed, second smoke is obtained after the first smoke flows through the condenser, and the concentration of the sulfur vapor in the second smoke is lower than or equal to 100 mg/Nm<3>. With the adoption of the method, the particulate matter, sulfur vapor and sulfur dioxide in the smoke are effectively separated, and the recovery rate and the purity are high.

Description

technical field [0001] The invention relates to the technical field of treating flue gas produced by sulfur decomposition gypsum by-products, in particular to a method for separating particulate matter, sulfur vapor and sulfur dioxide in flue gas and its application. Background technique [0002] The discharge of gypsum by-products (such as phosphogypsum, desulfurized gypsum, fluorine gypsum, anhydrite or nickel gypsum) in China is extremely large. It is of great economic and social value to realize the transformation of gypsum by-product waste into treasure and reduce environmental pollution. Energy saving and environmental protection technology. Gypsum by-products contain a large amount of calcium sulfate. Using sulfur as a reducing agent, calcium sulfate can be thermally decomposed into calcium oxide and sulfur dioxide at high temperature to obtain high-concentration sulfur dioxide gas that can be used to produce sulfuric acid and solids that can be used to prepare cement...

Claims

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Application Information

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IPC IPC(8): B01D53/81B01D53/50B01D53/48B01D46/54C01B17/02C01B17/56C01F11/46
CPCB01D46/543B01D53/002B01D53/48B01D53/501B01D53/81B01D2258/0283C01B17/021C01B17/56C01F11/46
Inventor 高麟汪涛张伟
Owner CHENGDU INTERMENT TECH
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