HANGZHOU ZETIAN TECHNOLOGY CO., LTD.
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Installation Conditions of Continuous Monitoring System for Cems Flue Gas Emission

Installation Conditions of Continuous Monitoring System for Cems Flue Gas Emission

Site I: Site where monitoring points are selected to be installed on chimneys

1.There are elevators or revolving elevators to go up to the platform.

2.The lowest platform or the platform to be built can be easily ascended (absolutely by the climbing stairs of chimney ).

3.The distance between the lowest platform and the entrance of the flue should satisfy a certain distance - 4 times the diameter of the chimney.

Site II: Site selection of monitoring points installed in flue

1. Select the main flue installed after the induced draft fan

1)It can not satisfy the condition of installing on the chimney.

2)The length of straight section of flue should be more than 6 times the equivalent diameter of flue, and the diameter should not be changed.

3)There are escalators, etc. which can reach the flue measuring point directly.

2.Choose the main flue installed before the induced draft fan
1)It can not satisfy the condition of installing on the chimney.

2)The length of the straight pipe section of the main flue after the induced draft fan is less than 6 times the equivalent diameter of the flue.

3)The length of the straight pipe section of the flue before the induced draft fan meets the equivalent diameter of the flue over 6 times and does not change the diameter.

4)There are escalators and so on, which can reach the flue measuring point directly.

3.Choose the main flue installed before and after the induced draft fan
1)It can not satisfy the condition of installing on the chimney.

2)The length of the straight pipe section of the main flue after the induced draft fan is less than 6 times the equivalent diameter of the flue.

3)The length of the straight pipe section of the two flues before the induced draft fan all meets the equivalent diameter of the flue over 6 times and does not change the diameter.

4)There are escalators and so on, which can reach the flue measuring point directly.

To meet the above conditions, the CEMS monitoring point can be installed in the flue before and after the induced draft fan, that is, the flue gas sampling probe is installed in the main flue after the induced draft fan, and the smoke and dust tester and the flue gas parameter tester choose two flues before the installation of the induced draft fan.

★To sum up, the principles of selecting monitoring points for CEMS can be followed as follows:

★We should try our best to select the points that meet the requirements of national standards.

★Use as few instruments as possible to meet measurement requirements

★Choose as many points as possible to reflect the true value.

★Choose the location suitable for installation, operation and maintenance as far as possible.

★Choose the point that meets the requirement of the equipment as far as possible.

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