Novel ammonia refrigeration intercooler

Abstract

The invention discloses a novel ammonia refrigeration intercooler. A coil pipe for high-pressure ammonia liquid heat exchange is arranged in a tank, a tubular convection cylinder is welded to the center of the coil pipe, an air guide tube deeply extends into the convection cylinder, an air outlet screen cage is arranged on a tube port, blades with inclined angles are welded to the outer wall of the air guide tube, gaps exist between the blades with the inclined angles, and a tubular outer cylinder is welded to the blades with the inclined angles; an isolation plate and a flow baffle are disposed in a gas-liquid separator tank, and the isolation plate divides the tank so that ammonia steam can only rise along the gaps between the blades with the inclined angles; the flow baffle blocks the ammonia steam so that the steam can only rise in a baffling mode; the isolation plate is provided with a liquid flow tube with a downward opening; the upper portion of the tank of the intercooler is provided with an exhaust tube for two-stage compression. Liquid ammonia carried in the ammonia steam is completely removed, so that work efficiency and performance of two-stage compression are improved; the heat exchange coefficient of the coil pipe is improved by means of arrangement of the convection cylinder, and temperature reduction of the high-pressure ammonia liquid in the coil pipe is facilitated.

Description

technical field [0001] The invention relates to an intercooler used in a double-stage compression ammonia refrigeration device, in which ammonia vapor is cooled after being compressed in the first stage before entering the second-stage compressor. Background technique [0002] Ammonia has excellent thermodynamic properties, and ammonia is generally used as a refrigerant in larger refrigeration systems. In practical application, when the required low temperature is lower than -20°C, two-stage compressors are generally used to complete the compression work. The first-stage compression sucks in the low-temperature steam from the evaporator, and discharges the medium-pressure superheated gas after compression. [0003] The medium-pressure superheated gas is generally cooled to about 0°C through the intercooler, and the ammonia vapor saturation treatment is completed at the same time, followed by ammonia gas-liquid separation and then sucked into the high-pressure stage for compr...

AI Technical Summary

Problems solved by technology

[0009] The existing ammonia intercooler has the defects of incomplete gas-liquid separation and low coil cooling heat transfer coefficient during operation, and the effect is not satisfactory

Images