(Daily Question) Coal-to-oil and olefins forum, April 8, 2018
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3.jpg Participation: Prize of 5 Wealth； Correct answer: Reward of 10 wealth points ； Note: This post is valid for 48 hours. Question: (DMTO) Olefin separation unit: What is the working principle of the steam ejector pump in the propylene refrigeration compressor? (1) The working steam expands at high pressure through the nozzle and is ejected at high speed; during this ejection process, the static pressure energy of the steam is converted into kinetic energy, creating a negative pressure that draws in gases ； (2) The inhaled gas, mixed with vapor, enters the diffuser tube, where its velocity gradually decreases and its kinetic energy is converted into static pressure energy, causing the pressure to rise; it is then discharged through the outlet tube. Note: The answer will be announced automatically in two days!
(1) The working steam expands at high pressure through the nozzle and is ejected at high speed; during this ejection process, the static pressure energy of the steam is converted into kinetic energy, creating a negative pressure that draws in gases； (2) The inhaled gas, mixed with vapor, enters the diffuser tube, where its velocity gradually decreases and its kinetic energy is converted into static pressure energy, causing the pressure to rise; it is then discharged through the outlet tube.
①When the working steam enters the nozzle of the ejector, it undergoes adiabatic expansion; ② it is ejected at a high speed of 1000–1400 m/s, creating a low pressure at the nozzle exit that draws fluid in from the inlet; ③ the fluid drawn in enters the mixing chamber together with the working steam, and then flows through an expansion tube, where the flow velocity of the fluid gradually decreases while the pressure increases, before being discharged from the outlet.
1) The working steam expands under high pressure through the nozzle and is ejected at high speed; during this ejection process, the static pressure energy of the steam is converted into kinetic energy, creating a negative pressure that draws in gases； (2) The inhaled gas, mixed with vapor, enters the diffuser tube, where its velocity gradually decreases and its kinetic energy is converted into static pressure energy, causing the pressure to rise; it is then discharged through the outlet tube.
(1) The working steam expands at high pressure through the nozzle and is ejected at high speed; during this ejection process, the static pressure energy of the steam is converted into kinetic energy, creating a negative pressure that draws in gases； (2) The inhaled gas, mixed with vapor, enters the diffuser tube, where its velocity gradually decreases and its kinetic energy is converted into static pressure energy, causing the pressure to rise; it is then discharged through the outlet tube.
(1) The working steam expands at high pressure through the nozzle and is ejected at high speed; during this ejection process, the static pressure energy of the steam is converted into kinetic energy, creating a negative pressure that draws in gases； (2) The inhaled gas, mixed with vapor, enters the diffuser tube, where its velocity gradually decreases and its kinetic energy is converted into static pressure energy, causing the pressure to rise; it is then discharged through the outlet tube.
(1) The working steam expands at high pressure through the nozzle and is ejected at high speed; during this ejection process, the static pressure energy of the steam is converted into kinetic energy, creating a negative pressure that draws in gases； (2) The inhaled gas, mixed with vapor, enters the diffuser tube, where its velocity gradually decreases and its kinetic energy is converted into static pressure energy, causing the pressure to rise; it is then discharged through the outlet tube.
①The working steam expands rapidly as it passes through the nozzle under high pressure, exiting from the nozzle at high speed. During this process, the static pressure energy of the steam is converted into kinetic energy, creating a negative pressure that draws in gases; ② The gases drawn in mix with the steam and enter the diffuser, where their velocity gradually decreases and their kinetic energy is converted back into static pressure energy, causing the pressure to rise, after which they are discharged from the outlet pipe.
Answer: (1) The working steam expands at high pressure through the nozzle and is ejected at high speed; during this ejection process, the static pressure energy of the steam is converted into kinetic energy, creating a negative pressure that draws in gases； (2) The inhaled gas, mixed with vapor, enters the diffuser tube, where its velocity gradually decreases and its kinetic energy is converted into static pressure energy, causing the pressure to rise; it is then discharged through the outlet tube.
(1) The working steam expands at high pressure through the nozzle and is ejected at high speed; during this ejection process, the static pressure energy of the steam is converted into kinetic energy, creating a negative pressure that draws in gases； (2) The inhaled gas, mixed with vapor, enters the diffuser tube, where its velocity gradually decreases and its kinetic energy is converted into static pressure energy, causing the pressure to rise; it is then discharged through the outlet tube.
A steam jet pump converts the potential energy of high-pressure steam into high-speed kinetic energy through nozzles; this drives in low-pressure steam, enabling thorough mixing in the mixer section of the ejector, thereby reducing velocity and increasing pressure to meet the needs of production.