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    How to calculate the humidification speed of the drum type dust humidifier?

    RELEASE DATE:2019-08-27 PUBLISHER:BACKUPDATA

    On the basis of summing up various kinds of dust humidifiers, aiming at the special working condition of high fluctuation of all parameters of flue gas of vertical kiln, through optimization design, adopt the new concept of cylinder body structure, top air inlet, through the central air pipe into the lower cone, uniform into each chamber, the design is increasingly reasonable.

    1. Temperature control

    The flue gas temperature of vertical kiln generally fluctuates in the range of 60-300°, and the moisture content of flue gas fluctuates in the range of 4-12%. In order to prevent the occurrence of dew-forming and mushy machine of dust humidifier and the occurrence of malignant accidents such as bag-burning due to high temperature, the following measures are taken in the dust humidifier system:

    Insulation measures shall be taken in the dust humidifier's air intake pipe, body and dust hopper, etc., to prevent the condensation of dust humidifier.

    Temperature detection and automatic alarm device shall be installed at the air inlet and exhaust outlet of the dust humidifier, and cold air entry device shall be installed at the air inlet.Once the flue gas exceeds the operating temperature range of bag dust removal, alarm will occur and automatic temperature control measures will be taken to ensure the normal operation of dust humidifier.

    Electric heating and vibration devices are installed on the dust hopper to avoid the problem of ash accumulation due to low temperature.

    2. Calculation of humidification speed

    Dust drum humidification humidification machine speed V is added wet gas flow (m3 / min) and the ratio of humidifying fabrics area (m2), thus to convert for m/min, also called the humidifying speed, it only represents the average speed of gas through the dust bag, don't consider, there are a lot of area of fabric fiber occupies so called "apparent air velocity".The humidification rate is a very important factor to determine the performance of dust humidifier.

    Too high humidification speed will cause excessive pressure loss, reduce dust removal efficiency, make dust removal filter bag blocked and quickly damaged.However, to improve the humidification speed, generally speaking, the method of ash cleaning in bag dust humidifier has an influence on the selection of the humidification speed.For ash cleaning (pulse, air ring, etc.), its humidifying speed is higher than that of low-energy ash cleaning (swing, blowback, etc.).