Translation of "Staubbeladung" in English

In this way, a more uniform dust loading of the filter body is achieved.

Low dust loads cause the filter to clog slowly.

For applications with high dust load. The safety filter can be replaced without tools.

However, this has given rise to serious separation problems in view of the high dust content of the gases in heat exchangers of this type.

The result is a dust charge of 0.5 to 5 kg of solids per kg of flue gas.

Protects Primary Filter from Lint Clogging and Reduces Dust Loading for Greater System Efficiency.

According to the invention, this problem is solved by automatically changing the time interval between the knocks in steps so that the long-term average of the measured dust loading of the purified gas approaches a minimum.

According to the example assumed here, the value f1 causes the long-term average of the dust loading to fall and so this procedure is continued until the minimum dust loading, which is obtained when a fx is reached.

This minimum will be recognized by the fact that, upon further increasing the knock frequency to the value fx+1, the long-term average Sm of the dust loading increases.

It has, however, been found that the collection efficiency of the second cyclone of the series connection is considerably lower than that of the cyclone upstream thereof which is due to a materially lower dust load of the air introduced into the downstream cyclones of the series.

By extensive investigations it has been found that the irregular dust loading of the filter beds is due to the fact that the gas stream often is not uniformly distributed over the entire flow-receiving area and that the gas stream comprises streaks which have a low dust content and streaks having a high dust content.

This leads to greater wear, since the velocity occurs to the third or fourth power in the wear rate, whereas the dust loading occurs only linearly.

Because of the large amounts of off-gas incurred mostly discontinuously in the melting process and the above-indicated frequently high CO2 contents and the high dust loading of the off-gases in conventional melting techniques, it is likely that a future application of such off-gas treatment technique will be technically problematic or economically unfeasible.

The dust attracted to the records was assessed in laterally incident light and was compared with the amount of dust on similarly treated, but not antistatically finished records.

In cases in which the raw gas does not exhibit appreciable fluctuations in rate, temperature and dust loading, a simple timer will be used. More differentiated control means will be required under strongly changing conditions.

It is apparent that both features have the result that the gas stream which for the centrifugal separator exhibits great differences as regards velocity and dust loading can effectively be straightened and uniformized for the subsequent deducting in the granular bed filter and the disadvantages outlined hereinbefore can substantially be avoided and the economy of the operation of the entire apparatus can be greatly improved.

The known separation elements work within relatively rigid limitations with respect to their operational parameters, and hence a change in the gas quantity and/or the gas temperature, as well as the dust content of the gas, can lead to different separation efficiencies and change the separation efficiency curve with regard to its steepness and average particle size.

To this end, the mixture stream is divided into a dust rich partial stream and a partial stream of low dust content, and the partial streams with differing dust loading are fed to the ignition region of the burner.

The separation into two partial streams with differing dust loading is preferably carried out in the dust conduit 7 immediately adjacent the burner.

In the heat recovery of the exhaust gases of pressurized coal gasification plants, additional problems arise in that high gas pressure as well as heavy dust loading and aggressivity of the gases must be added to the high gas temperature.

The following is set forth as an example for the dust load on the stack gases conducted through the stack gas flue 8 according to this invention: 1.0 kg/Nm3 if intermediate superheating is provided, and 0.5 kg/Nm3 if no intermediate superheating is included.

FIG. 9 is used for illustration purposes, and shows a diagram in which the volume flow through the bag wall of vacuum cleaner filter bags is depicted in dependence on the dust load in grams.

FIG. 9 is used for illustration purposes, and shows a diagram in which the volume flow through the vacuum cleaner (Vorwerk VK 140) is depicted in dependence of the dust load (DMT-8 dust) in grams.

FIG. 9 is used for illustration purposes, and shows a diagram in which the volume flow through the bag wall of vacuum cleaner filter bags is depicted in dependence on the dust load in grams.