Switching method of pressure swing adsorption device for treating non-condensable gas
A technology of pressure swing adsorption and gas condensation, which is applied in separation methods, chemical instruments and methods, and separation of dispersed particles, and can solve problems such as changes in separation pressure, large changes in propylene content, and changes in the flow rate and concentration of non-condensable gas
Inactive Publication Date: 2011-02-16
BEIJING SINO HYPRO PETROCHEM TECH
View PDF4 Cites 6 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, the flow rate and concentration of non-condensable gas produced in the low-pressure propylene gas recovery process are often unstable. First, the batch bulk polypropylene production process itself is discontinuous, so the propylene gas discharged from the flash tank into the gas holder The flow and concentration are constantly changing, which causes the flow and concentration of non-condensable gas produced by the low-pressure propylene gas recovery system to also change; secondly, the ambient temperature has a great influence on the temperature of the circulating water, and then on the temperature of the gas-liquid separation after cooling; Furthermore, changes in environmental conditions and operating conditions will also affect the operating state of the compressor, resulting in changes in the gas-liquid separation pressure after cooling
In this way, within the same adsorption time, the amount of propylene adsorbed by the adsorption bed often changes greatly, which obviously affects the operation effect of the pressure swing adsorption device.
The propylene concentration at the inlet or outlet of the pressure swing adsorption device detected by the detection instrument is also used as a switching parameter, but this detection instrument often has relatively large investment, and the reliability, stability and accuracy are not very good.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0021] The following is attached figure 1 The switching method of the pressure swing adsorption device for treating the non-condensable gas discharged from the low-pressure propylene gas recovery system of the batch bulk polypropylene device according to the invention is further explained.
[0022] The mixed gas mainly based on propylene and nitrogen from the flash tank of the polypropylene device (not shown in the figure) - propylene gas enters the gas cabinet of the low-pressure propylene gas recovery system ( 1), after buffering and mixing in the gas cabinet, it enters the compressor (2) through the pipeline (9) along the arrow (10), and after being compressed and boosted to a pressure of about 1.8-2.2MPa, it enters the circulating water cooling through the pipeline (11) The device (3) is condensed and cooled to about 20-40°C, most of the propylene in the propylene gas is liquefied, and the gas-liquid mixture enters the gas-liquid separation tank (4) through the pipeline (1...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention relates to a switching method of a pressure swing adsorption device for a batch bulk process polypropylene device to recover non-condensable gas. Propylene amount figured out by using condensation pressure, condensation temperature and the non-condensable gas feed flow of the pressure swing adsorption device as parameters is used as the switching parameter of the pressure swing adsorption device to control the switching operation of the pressure swing adsorption device.
Description
technical field [0001] The invention relates to a switching method of a pressure swing adsorption device for treating non-condensable gas discharged from a low-pressure propylene gas recovery system of an intermittent bulk method polypropylene device. Background technique [0002] The batch bulk polypropylene process is a polypropylene production process independently developed and widely used in China. In the production process of batch bulk polypropylene plant, under the action of catalyst and activator, liquid propylene undergoes polymerization reaction in the polymerization tank under the reaction pressure of 3.5MPa (gauge) and reaction temperature of 75°C to produce solid polypropylene Powder. After the polymerization reaction, the remaining propylene in the polymerization tank needs to be recovered to obtain solid polypropylene powder without propylene. Under normal circumstances, the high-pressure recovery of propylene is carried out first, which is to rely on the p...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): C08F2/02C08F10/06C08F2/01B01D53/047
Inventor 张国瑞
Owner BEIJING SINO HYPRO PETROCHEM TECH