Speaking of bag filter for 20T boiler, it is a large-scale dust removal equipment. Needless to say, the cost is just like the news that housing prices in first-tier cities are falling and the increase in second-and third-tier cities is falling. For good reason, it is naturally expensive. So what design points should be paid attention to during the installation of this large-scale dust removal equipment?
1. In order to ensure that the continuous operation of the boiler is not limited by the operation of dust removal equipment or the shutdown in different areas, it has good and appropriate adjustment characteristics when adjusting the load, and can run continuously, reliably and stably under the operating conditions of the power plant. We choose that the full filtration wind speed of the dust collector is less than 0.8m/min. After calculation and reasonable consideration of the arrangement of the dust collector, the filtration area of the dust collector in this scheme is determined to be 20T boiler 1260m2, which can fully meet the above requirements.
2. 1250 m2 dust collector layout: (single) row of ***5 units with 84 filter bags in each room, and each dust collector * * * has 84×5=420 filter bags. The total filtration area is 1260m2/ set. (The layout of the above-mentioned dust collector, the height of the lower flange of the ash hopper from the ground and the overall dimensions of the dust collector can be adjusted appropriately according to the site conditions).
3. The filter bag adopts φ 160×6000mm standard specification, and adopts bag filter material (PPS+PTFE) with film covering.
The bag filter of the 4.20T boiler adopts external filtration mode, and the filter bag of the bag filter is connected with the ceiling by self-locking through the spring expansion ring, so that the clean air is completely separated from the dusty gas. The filter bag is supported by the bag cage.
5. When cleaning the dust, the PLC sends a pulse signal to the electromagnetic pulse valve (Xiaoyang Environmental Protection), and the compressed air is ejected through the blowpipe, so that the filter bag is radially deformed and the dust is shaken off.
6.20T boiler bag filter is equipped with a canopy at the top to prevent condensation under environmental conditions and protect the top device of the filter.
7. The dust removal system is equipped with a bypass pipeline, which can discharge the flue gas through the bypass pipeline without passing through the filter bag under the conditions of boiler oil inlet, abnormal flue gas temperature and "four pipes" bursting, thus effectively protecting the dust remover.
8. Bag filter is equipped with on-line detection device for flue gas temperature. When the flue gas temperature is too high or too low, exceeding the preset alarm value, the valve of the bypass system will automatically open to discharge flue gas and protect the filter bag.
9. The air distribution device at the inlet of the 20T boiler bag dust collector makes the dusty gas entering the dust collector evenly distributed in each filter bag, effectively preventing the collision and friction between filter bags during dust removal, which is beneficial to prolonging the service life of filter bags.
10, the dust collector hopper is equipped with a vibrating dust removal device to remove the accumulated dust in the dust collector in time, so as to ensure the smooth discharge of dust in the dust collector hopper.
1 1. The air inlet of each room of the dust collector is equipped with an off-line valve, which is convenient for online maintenance.
As long as we pay attention to the key points of 1 1 scheme design and do a good job in the installation of 20T boiler bag filter, it will be easier to do and implement in the installation of larger boiler bag filter (xiaoyang machinery) in the future, such as 40t, 60t, 75t or even 100t. I hope this answer will help you!