Pressure and material issues of the chlorine drying tower
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This post was last edited by sunjl1981 on 2013-1-6 at 23:52. I would appreciate help from experts: is it acceptable to place the chlorine drying tower behind the Nessler pump, with a pressure of 0.15 MPa? If possible, how should the material of the drying tower be chosen? What type of drying tower is most effective when the moisture content is very low? This process configuration is mainly required to facilitate the pressure increase step following magnesium electrolysis. Assume that the drying tower is primarily used for dust removal, and after dust removal, a turbo compressor is used to increase the pressure. Since the magnesium electrolysis chlorine gas contains sublimates, and considering that the moisture content is essentially low after dust collection using bag filters at the front end and drying with sulfuric acid using Naissl pumps, very low dust levels in the chlorine gas are required in order to increase the pressure using a turbine compressor; therefore, a drying tower is used for washing and dust removal, followed by pressure increase using a turbine. This post was last edited by tzy on 2007-12-21 18:05 ] # ， ， &
The moisture content is very low, so no further drying is needed. It is generally dried in front of the Nagaoka pump, and the material most commonly used is titanium alloy! This post was last edited by limingshuguang on 2007-12-21 13:18.]
1. Currently, most production processes include a drying tower before the Nutsche pump； 2. The material of the drying tower is generally PVC/FRP ； 3. As mentioned on the second floor, when the water content in chlorine is below 0.5%, dry chlorine will ignite in reaction with titanium; this must under no circumstances happen ； 4. In the case of a pump at the back, after compression, the Naipu pump itself is dried as well; therefore, a drying tower is not necessary ； 5. It is probably the subsequent products that have requirements regarding the water content in chlorine; in such cases, liquefaction followed by vaporization is generally used to ensure compliance. :lol
Chlorine drying towers are rarely installed behind Naismith pumps; in fact, there are almost none of such installations. They are usually placed in front of the pumps. Three-tower and four-tower processes are employed, but currently the two-tower process, which involves a packed tower combined with a combined tower (one layer of packing plus several layers of bubble columns), is more commonly used. By properly controlling the temperature in each tower, it is possible to meet the drying requirements, with the water content in chlorine reaching 50 ppm. Of course, if special requirements exist – I’ve seen a Japanese manufacturer with very high demands regarding moisture levels – then each section of the bubble column is cooled either externally or using internal ceramic tubes. For chlorine with such high requirements, Naismith pumps are not used; instead, turbines are employed for transportation in order to reduce the amount of acid carried along.
This process configuration is mainly required to facilitate the pressure increase step following magnesium electrolysis. Assume that the drying tower is primarily used for dust removal, and after dust removal, a turbo compressor is used to increase the pressure. Since the magnesium electrolysis chlorine gas contains sublimates, and considering that the moisture content is essentially low after dust collection using bag filters at the front end and drying with sulfuric acid using Naissl pumps, very low dust levels in the chlorine gas are required in order to increase the pressure using a turbine compressor; therefore, a drying tower is used for washing and dust removal, followed by pressure increase using a turbine.
1. If this is the process involved, the design pressure of the drying tower should be set at 0.2 MPa to ensure safety； 2. Add an acid mist collector after the washed drying tower, ensuring that the demisting efficiency of the inner tank is satisfactory ； 3. The sulfuric acid from the subsequent drying towers can be fed into the preceding drying towers for comprehensive utilization, in order to reduce acid consumption.
Towers are generally installed in front of the NASH PUMP; 3 towers are sufficient for washing, drying, and blistering the T material. After the NASH process, an acid mist capture system is usually sufficient. The moisture content should be at least below 100 ppm; of course, by controlling the operating conditions properly, this value can be reduced further. The temperature should be kept as low as possible. This post was last edited by limingshuguang on 2007-12-24 at 11:11
I mean drying in front of the Nash pump – the drying effect doesn’t reach 0.5%! Use a Nash pump instead, as it gives a better drying effect! Both the degree of dryness and the chlorine pressure have reached the standard! If a drying tower is not used and only Nash pumps are employed for drying during the compression process, it is very difficult to achieve the level of dryness required by the process! This post was last edited by limingshuguang on 2007-12-24 11:12.]