The gas cooling of high temperature flue gas in bag filter can use low temperature air or water as medium, and some cold air and water cooling occur. Both cold air and water cooling can be directly cooled or indirectly cooled, that is to say, cold air can assist flue gas cooling, and then the dust collector will be warm.
Some low-temperature flue gas can be added appropriately. If the gas temperature is inconsistent in the same dust removal system, the best way is to add some low-temperature gas to high temperature first, so that the mixed gas of cold air can be added continuously, so that the temperature in the dust collector will not be too high.
There is another way to cool the vacuum cleaner, which is to install a cold air valve. Before the bag filter, the suction cooling valve with cold air valve can mainly prevent high smoke from entering the bag filter beyond the specified temperature. The cold air valve is a butterfly valve with adjustment function, one end of which is connected with the high-temperature pipeline and the other end is connected with the outside atmosphere. The regulating valve is operated by automatic high temperature signal, which controls the amount of air sucked into the flue system, thus reducing the flue gas temperature and adjusting it within a certain range.