A frequency-modulated self-excited oscillating jet device and its application method

Abstract

The invention relates to a frequency modulation type self-oscillation jetting device and a use method thereof. The frequency modulation type self-oscillation jetting device comprises a shell with a tubular opening structure, a base plate, a vertical jetting inlet, a rectification cavity, a mixed flow cavity, a jetting outlet and tangent jetting inlets, wherein an opening in the bottom of the shell is fixedly connected with the base plate; the vertical jetting inlet is vertically arranged at the top of the shell; the inlet end of the vertical jetting inlet is connected with a backwashing pipeline; the outlet end of the vertical jetting inlet is communicated with the rectification cavity positioned at the upper part in the shell; a channel and the mixed flow cavity are arranged below the rectification cavity in sequence in the shell; the lower side of the rectification cavity is communicated with the inlet of the channel; the outlet of the channel is positioned above the inlet of the mixed flow cavity; the outlet of the mixed flow cavity penetrates through the base plate and is communicated with the jetting outlet; a jetting fusion region is formed between the channel outlet and the inlet of the mixed flow cavity; a plurality of tangent jetting inlets communicated with the upper part of the channel are formed in the outer side wall of the upper part of the shell at intervals. The frequency modulation type self-oscillation jetting device is energy-saving, so that the problems of local deformation, washout damage and the like to a filter screen due to extreme-high impact pressure are solved.

Description

technical field [0001] The invention relates to a liquid-solid separation jet device and its use method, in particular to a frequency-modulated self-excited oscillating jet device and its use method which cooperate with the rotary screen filter of the LNG receiving station. Background technique [0002] The rotary screen filter of the LNG receiving station has the characteristics of seawater corrosion resistance, stable separation efficiency and appropriate resistance. The rotary screen filter is usually used in conjunction with the trash rack on the upstream side, which can effectively intercept and filter the particulate impurities in the seawater. It is the key equipment to ensure the reliable operation of seawater pumps and water intake facilities in LNG receiving stations. [0003] Such as Figure 1 ~ Figure 4 As shown, the main structure of the rotary screen filter includes: upper frame 21, motor 22, worm gear reducer 23, transmission chain 24, guide rail 25, main shaf...

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Problems solved by technology

[0006] In view of the above problems, the object of the present invention is to provide a frequency-modulated self-excited oscillating jet device and its use method, which can achieve better cycle regeneration effect with lower backwash pressure, save energy consumption; avoid excessive impact pressure causing Local deformation of the filter screen, erosion damage and other problems, prolong the service life of the rotary filter screen

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