The invention discloses a
triethylene glycol negative pressure regeneration
system and method, and relates to the technical field of
natural gas purification application, the
triethylene glycol negative pressure regeneration
system comprises a rectifying column, a
heat exchanger, a flash tank, a
buffer tank, a
reboiler and a gas-liquid separator, the rectifying column is arranged above the
reboiler and is communicated with the
reboiler, a preheating
pipe is arranged at the upper part in the rectifying column, the bottom of the reboiler is communicated with the
buffer tank, and the
buffer tank is communicated with the
heat exchanger. A spiral
pipe is arranged in the buffer tank, a barren liquor outlet is formed in the bottom of the buffer tank, and a fire
pipe is arranged in the reboiler; an outlet of the preheating pipe is connected with a material inlet of a
heat exchanger through a pipeline J. The heat exchanger is connected with a flash tank which is connected with a spiral pipe. The outlet is communicated with the feeding hole of the rectifying column; a gas-phase outlet of the rectifying column is connected with a plurality of compressors which are connected with a medium inlet of the heat exchanger; the medium outlet of the reboiler is connected with the gas-liquid separator, and the gas-liquid separator is communicated with the
fuel gas inlet of the fire tube, so that the aims of regenerating
triethylene glycol at low temperature, reducing the scaling risk of the fire tube, improving the operation energy efficiency of the
system and enhancing the
operation safety of the reboiler are fulfilled.