Method for testing forced oxidation air utilization rate of limestone wet desulphurization

A technology of wet desulfurization and forced oxidation, applied in chemical instruments and methods, separation methods, measuring devices, etc., can solve problems such as waste of equipment, increased power consumption of the desulfurization system, incomplete oxidation of the slurry in the absorption tower, etc. The method is simple, the normal operation is guaranteed, and the result is accurate

Active Publication Date: 2021-03-23
ELECTRIC POWER RES INST OF GUANGXI POWER GRID CO LTD
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  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

If the utilization rate of the forced oxidation air is too high, the design of the forced oxidation system may be too small, resulting in incomplete oxidation of the slurry in the absorption tower, and the desulfurization system cannot operate normally. If the utilization rate of the forced oxidation air is too low, the waste of equipment will be caused. Increased power consumption of desulfurization system

Method used

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  • Method for testing forced oxidation air utilization rate of limestone wet desulphurization
  • Method for testing forced oxidation air utilization rate of limestone wet desulphurization
  • Method for testing forced oxidation air utilization rate of limestone wet desulphurization

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Embodiment 1

[0037] specific, figure 1 A test method of the utilization of limestone moisture desulfurization forced oxidation air in the embodiment of the present invention includes the following steps:

[0038] S201, test method based on the natural oxidation rate of limestone wet desulfurization absorption tower slurry, obtains natural oxidation rate of absorption tower slurry;

[0039] specific, figure 2 A test method of the limestone moisture desulfurization absorption tower slurry in the embodiment of the present invention is shown, and the specific steps are as follows:

[0040] S101, preparing a coal-burning of boiler combustion, and the sulfur content of the coal is controlled in the design value;

[0041]Specifically, it is prepared to provide a boost for about 6 hours, which coal has a sulfur content of the coal should be controlled at about 60% of the design value, and the other coal coal coal should be substantially the same as the design value.

[0042] S102, adjust the boiler ...

Embodiment 2

[0074] This detection method includes testing the natural oxidation rate of the slurry by the test method of the natural oxidation rate of limestone wet desulfurization absorption tower; the boiler is stabilized at the design of coal species and design sulfur content (maximum sulfur content), full load conditions (BMCR) Operation, limestone humid desulfurization system All equipment should be operated, its desulfurization efficiency is within the design scope; record of the desulfurization system in the flue gas online monitoring device (CEMS) and exports SO 2 Concentration, flue gas flow, flue gas O 2 The average value of the concentration of 30 min, the flow of the oxidized fan for 2 hours, while absorbing the tetrael liquid sample once every 30 minutes, analyzing the Solid Caso after filtration of the slurry 3 .1 / 2h 2 O content; when the slurry was filtered after the solid was less than 1%, the test ended, used (1), (2), calculated the utilization of the oxidation air; when t...

Embodiment 3

[0102] Testing of the Limestone Wet Flue Gas Desulfurization System of 330MW Units in Guangxi Power Plant Absorption Tower of Mandatory Oxidation Air

[0103] (11) 330MW unit of Guangxi, 330MW unit, using limestone humid flue gas desulfurization system, and a total of 4 layers of spray layers (correspondingly 4 slurry circulation pumps), the design value of the sulfur content in the coal is 2.83%, and the SO is treated in the flue gas 2 The concentration FGD entrance design value is 6800mg / m 3 (Standard, dry, O 2 6%), design processing of flue gas volume 1089235M 3 / h (standard, dry, o 2 6%), its emissions SO 2 Concentration allows emission standards less than 400 mg / m 3 (Standard, dry, O 2 6%). For each absorbent tower sets two oxidized air systems (one-to-use), each oxide flow rate is 19000m 3 / h (stated).

[0104] (12) Improved flue gas desulfurization system (FGD), export measurement flue gas SO 2 The concentration, flue gas volume of flue gas was verified, and its error...

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Abstract

The invention discloses a method for testing the forced oxidation air utilization rate of limestone wet desulphurization. The method comprises the following steps that: the natural oxidation rate of absorption tower slurry is acquired based on a method for testing the natural oxidation rate of limestone wet desulphurization absorption tower slurry; a boiler stably operates under the conditions ofdesigned coal types, designed sulfur content and full load, all devices of a limestone wet desulphurization system should be put into operation, and the desulphurization efficiency is within a designrange. the content of CaSO3.1 / 2H2O in the solid after the slurry is filtered is analyzed; and when the content of CaSO3.1 / 2H2O in the solid after the slurry is filtered is less than 1%, the test is ended, and the utilization rate of forced oxidation air is calculated. The embodiment of the invention provides the method for testing the utilization rate of forced oxidation air of limestone wet desulphurization absorption tower slurry, which is simple to operate, high in accuracy and rapid in measurement.

Description

Technical field [0001] The present invention relates to the field of limestone moisture desulfurization, and more particularly to a test method of limestone humid desulfurization forced oxidation air utilization. Background technique [0002] According to my country's "thermal power plant atmospheric pollutant emission standards" (GB13223-2011), 200MW and above units must be equipped with desulfurization devices. According to statistics, more than 95% of the thermal power units in China are limestone-gypsum wet desulfurization technology, 22 of the 23 thermal power plants in Guangxi use limestone-gypsum wet desulfurization technology. [0003] Limestone - gypsum wet flue gas desulfurization, absorbent limestone (Caco 3 ) SO in smoke 2 The reaction is as follows: [0004] Caco 3 + SO 2 + → CASO 3 .1 / 2h 2 O [0005] CASO 3 .1 / 2h 2 O + O 2 = CASO 4 .2h 2 O [0006] Absorption tower slurry Calcium sulfate Caso 3 .1 / 2h 2 O oxidation into CASO 4 .2h 2 O The oxygen required by the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/00B01D53/34B01D53/50B01D53/80
CPCG01N33/00B01D53/80B01D53/502B01D53/504B01D53/346B01D2251/404B01D2251/606B01D2251/11
Inventor 林朝扶
Owner ELECTRIC POWER RES INST OF GUANGXI POWER GRID CO LTD
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