Novel purging tool for heat exchange tube of tubular heat exchanger

Abstract

The invention discloses a novel purging tool for a heat exchange tube of a tubular heat exchanger, which belongs to the technical field of tubular heat exchangers and comprises a connecting pipe, a branch guide tube is mounted at one end of the connecting pipe, air guide branch tubes are mounted on one side of the outer surface of the branch guide tube at equal intervals, a purging nozzle is mounted at one end of each of the air guide branch tubes, and comb-tooth-shaped clamping blocks are arranged on one side of the outer surface of the connecting pipe at equal intervals. The novel purging tool for the heat exchange tube of the tubular heat exchanger provided by the invention is simple and reasonable in structural design, external compressed air can be guided into the heat exchange tube by using the purging tool, a Laval jet tube is formed between the compressed air sprayed out at a high speed and the heat exchange tube, surrounding air is driven to enter the heat exchanger, it is guaranteed that the end of the heat exchange tube is fully purged and dried by the air, meanwhile, the amount of air entering the heat exchanger can be increased, the effect of the Laval jet pipe is enhanced, the interior of the heat exchange pipe is sequentially purged and dried, sufficient preparation can be made for the next step of injecting condensation water to be pressurized on the shell side for leakage detection, and the detection difficulty of workers can be reduced.

Description

technical field [0001] The invention relates to the technical field of tubular heat exchangers, in particular to a new type of purging tool for heat exchange tubes of tubular heat exchangers. Background technique [0002] Cities in northern my country adopt central heating for residents’ heating. Most of the heat sources for central heating are thermal power plants that drill holes through medium-pressure cylinders to extract steam, use medium-pressure cylinders to exhaust steam, and circulate water through the heating network through tubular heat exchangers. After heating, the heated steam drains into the condenser or deaerator of the power plant, where the circulating water of the heating network circulates inside the heat exchange tube, and the heating steam circulates on the shell side of the heat exchanger; [0003] Due to the huge difference between the circulating water quality of the central heating heating network and the drainage water quality of the heating steam o...

AI Technical Summary

Problems solved by technology

[0003] Due to the huge difference between the circulating water quality of the central heating heating network and the drainage water quality of the heating steam of the power plant, once the heat exchanger leaks, the circulating water of the heating network enters the condenser or deaerator of the power plant, which will inevitably cause the desalination load of the unit to increase. If the conductivity of condensate water and feed water exceeds the standard, it will cause serious problems such as boiler tube burst and steam turbine blade salt accumulation. Often, the leak point of the heat exchanger is very small, and it is difficult to find out which heat exchange tube is leaking. Some power plants Inject colored water into the steam side of the heat exchanger for leak detection, and some power plants inject ammoniated water into the steam side for leak detection, and some power plants use helium mass spectrometer for leak detection, but the results are not satisfactory. Not ideal, it is difficult to accurately determine which heat exchange tube is leaking, and the diameter of the heater heat exchanger is generally 25mm;

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