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Investigating method for lime activity and its analysing system

A test analysis, limestone technology, applied in the field of flue gas desulfurization, can solve the problems of not correctly reflecting the activity of limestone, different desulfurization process, etc., and achieve the effect of simple structure, simple measurement method and easy control

Inactive Publication Date: 2010-05-12
CHONGQING UNIV +1
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AI Technical Summary

Problems solved by technology

Looking at the current limestone activity testing methods at home and abroad, the common point is that most of them use the acid titration method. The advantages of the acid titration method are simple operation and rapid detection; the disadvantage is that the reaction mechanism is different from the actual desulfurization process, and often cannot correctly reflect the activity of limestone.

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  • Investigating method for lime activity and its analysing system
  • Investigating method for lime activity and its analysing system
  • Investigating method for lime activity and its analysing system

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Embodiment Construction

[0028] Limestone activity test method, limestone slurry with SO 2 Flue gas direct reaction, simulate the actual desulfurization process, by measuring SO 2 The removal rate reflects the activity of limestone, SO 2 The higher the removal rate, the better the activity of limestone; 2 The lower the removal rate, the worse the limestone activity. Specific steps are as follows:

[0029] A. Test preparation

[0030] (1) the limestone to be analyzed is ground into 250 mesh powder;

[0031] (2) prepare limestone slurry, the slurry proportioning is 5% (as limestone: water=50g: 1L);

[0032] B. Test steps

[0033] (1) Simulate flue gas and flow control, adjust N through pressure reducing valve 2 , CO 2 , O 2 and SO 2 Gas flow rate; for example, the four gas flow rates are: N 2 =1.64m 3 / h, CO 2 =0.24m 3 / h,O 2 =0.12m 3 / h,SO 2 =120mL / min;

[0034] (2) Turn on the temperature controller and set the flue gas temperature to 135°C;

[0035] (3) Put the prepared limestone s...

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Abstract

The invention discloses a limestone activity testing method and the analysis system thereof, making limestone pulp directly react with SO2 fume, simulating actual desulfation course, and reflecting limestone activity by measuring SO2 removal ratio, where the higher the SO2 removal ratio is, the better the limestone activity is and vice versa. And the analysis system mainly comprises limestone pulptank, pulp pump, absorption tower, gas steel cylinder, gas flow controller, limestone pump recover tank and pulp flow controller. And the invention can truly reflect limestone activity and reduce investment and operating cost. And the method is simple, effective and easy to implement, and able to accurately evaluate limestone activity and provides theoretical basis for fume desulfation engineering.

Description

technical field [0001] The invention relates to a detection technology applied to the flue gas desulfurization process, which is used to guide the design and optimization of the flue gas desulfurization system. The invention belongs to the technical field of flue gas desulfurization. Background technique [0002] With the rapid and sustained economic development, the atmosphere is 2 Serious pollution is becoming more and more obvious. Such as Chinese SO 2 The emission amounted to more than 20 million tons, becoming the world's SO 2 largest country in terms of emissions. Flue gas desulfurization (FGD) of coal-fired boilers is currently the only 2 Emission pathways, where limestone / gypsum wet flue gas desulfurization (WFGD) dominates. In WFGD, limestone slurry acts as SO 2 absorbent, when SO 2 At the same concentration, its absorption rate depends on the dissolution characteristics of limestone. The activity of limestone comprehensively reflects the ability of limesto...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/00G01N31/00
Inventor 董凌燕杜云贵刘清才杨剑刘艺陈登福谢兰罗新蕾罗捷
Owner CHONGQING UNIV