TH5265B - Air separation method for gaseous oxygen supply in a manner consistent with the variable demand model. - Google Patents

Abstract

The method of gaseous oxygen supply to meet the requirements of the variable demand model. in a manner consistent with this invention. The air is distilled and purified by a dual column low temperature purification process to produce IT complete with nitrogen and liquid oxygen in the high and low pressure column, complete IT extraction with nitrogen and liquid oxygen. out of the pressure column and low The complete vapor with nitrogen and liquid oxygen is extracted from the high and low pressure columns respectively. IT, complete with nitrogen and oxygen, is subjected to partial heating within the main process heat exchanger. And then it will be turbo expansion to cause system cooling. When a demand for gaseous oxygen appears The stream is pumped with nitrogen, it is deflected inside the main heat exchanger from partially heated and expanded. and will be completely heated, extruded And then the condensation resists the product stream. to produce gaseous oxygen and the condensed nitrogen is flashed into the flash tank. The flash vapor is added to the complete vapor with deflected nitrogen to increase the vaporization rate of gaseous oxygen. The resulting liquid is introduced into the low pressure column as a reflux. to inevitably lead to the extraction of liquid oxygen any excess quantity Liquid oxygen and condensed nitrogen that are not used promptly are stored.

Claims (9)

1. Methodology of gaseous oxygen supply to comply with the regulations of the variable demand model. These include: Purified water distillation by a double column low temperature purification process. Which uses an even column Which uses a high pressure column And low relative to each other in practice To produce complete vapor with nitrogen And liquid oxygen, respectively, the trigent-rich vapor stream drawing, which consists of nitrogen-rich vapor And a stream of liquid oxygen consisting of liquid oxygen From the high and low pressure columns respectively Partial heating and mechanical expansion by performing works on nitrogen-rich vapor flows And after the machine expansion, the complete vapor vapor with nitrogen is put through the refining process as the cooling of the system. In such a way as to maintain To maintain the heat on the path of the demand model When the need for gaseous oxygen appears Pumping the flow of products made from liquid oxygen contained within the liquid oxygen stream. So that the pressure is the delivery pressure The minimum partial divergence of the nitrogen-complete vapor stream from partial heating and full expansion and compression and heating. And then, at the very least, some condensation of the complete vapor stream with nitogen resists the vaporization of the product stream, hence to form gaseous oxygen. At the very least, some of the complete vapor stream with nitogen will be deflected at a sufficient rate to vaporize the product stream. And the product flow will be pumped at a sufficient rate to meet demand. Flashing of condensed liquid nitrogen from at least part of the nitrogen-complete vapor stream To form a two-phase flow of nitrogen contained by liquid and vapor phases. And the separation of the liquid and vapor phases from each other. The filling of the vapor phase containing the vapor phase with at least some of the nitrogen-rich vapor To increase the production of gaseous oxygen And the filling of the liquid nitrogen stream containing the liquid phase into the low pressure column as reflux To allow liquid oxygen to be drawn as liquid oxygen flow out of the low pressure column and to contain excess liquid, the unsuccessful liquid is put into the low pressure column. And of the unused liquid oxygen stream to generate the product flow 2. Methodology of claim 1 Here, liquid nitrogen flows are added to the low pressure column at a rate which is proportional to the input of the system cooling. In such a way that liquid oxygen is formed inside the low pressure column at a significant constant rate and will extract the nitrogen-rich vapor and liquid oxygen stream from the high and low pressure columns at a valuable rate. Significantly fixed 3. Methodology of claim 2. Here, low temperature distillation processes also make use of the cooling distance. To cool the air to a suitable temperature for the purification of the process. The product stream is introduced into the cooling phase and the nitrogen-complete vapor stream is partially heated within the cooling phase. And likewise At the very least, some of the nitrogen-rich vapor stream will be completely heated within the cooling phase and after being completely heated and compressed will be condensed internally. The cooling distance against the vaporization of the product stream. 4. Methodology of claim No. 3 Here is a complete nitrogen vapor stream that after expansion Will be added to the cooling distance For cooling, put into the distillation and low temperature double column purification By reducing the entropy of the purified air to be reduced. 5. Methodology of claim No. 4 Here, liquid nitrogen is flashed into the flash tank. To produce nitrogen in the liquid and vapor phases 6. Methodology of claim 4. Here, a low-pressure column produces low-pressure nitrogen vapor. Waste stream containing nitrogen vapor With low pressure it can get extracted from the low pressure column. The waste stream is then put into the cooling phase to cool the air and the IT stream, complete with nitrogen after the expansion. It will be attached to the waste stream before being put into the cooling phase. To add cooling to the double column low temperature purification process. The retention contains the excess volume of the undetermined liquid phase into the low pressure column. And of the unused liquid oxygen stream to generate the product flow 7. Methodology of claim 1. Here, low-temperature distillation processes also make use of the cooling phase. To cool the air to a suitable temperature for the process's purification distillation, the product stream is inserted into the cooling phase and the complete IT stream, with nitrogen being partially heated within phase. Cooling And likewise At least, some of the nitrogen-rich vapor streams have been completely heated and compressed. Will be condensed within the cooling phase against each other to vaporize the body product stream 8. Methodology of claim 1. Here, the double-column low-temperature distillation process also takes advantage of the cooling phase. To cool the air to the optimum temperature for the process purification within the purification phase and complete nitrogen vapor stream which after expansion Will be added to the cooling phase To put the system cooling into the double column low temperature purification process. By reducing the entropy of the purified air to be reduced. 9. Methodology of claim 1. Here, liquid nitrogen is flashed into the flash tank to separate the liquid and vapor phases from each other.