Split self-suction type Venturi tube washer

Abstract

The invention provides a split self-priming venturi tube scrubber. It includes an outer sleeve mainly composed of a contraction section and an expansion section, and also includes a conical independent contraction section. The conical independent contraction section is a conical structure with the same shape as the contraction section of the outer sleeve. The conical independent contraction section is sleeved on the outer sleeve In the shrinkage section of the outer sleeve, the conical independent shrinkage section and the shrinkage section of the outer sleeve are connected by flanges at their respective inlet ends, and an annular liquid flow channel is formed between the two, and a liquid suction hole is opened on the shrinkage section of the outer sleeve. An outlet baffle is installed at the outlet end of the expansion section of the outer casing. Compared with common Venturi scrubbers, the invention has higher removal efficiency. It is suitable as a Venturi scrubber required for the containment filtration and discharge system of a pressurized water reactor nuclear power plant, and it is also suitable for industrial dust removal processes.

Description

technical field [0001] The invention relates to a scrubber, in particular to a Venturi tube scrubber. Background technique [0002] Nowadays, nuclear power is more and more popular as a clean and efficient energy source. Although the design of PWR nuclear power plants has implemented the principle of deep safety to ensure the safety of nuclear power plants under design basis accidents, there is still the possibility of accidents beyond design basis in nuclear power plants, which will lead to serious accidents like core meltdown pressure vessels . And if there are no measures to mitigate the accident, the molten core will react with the concrete floor to produce a large amount of non-condensable gas. The integrity of the last barrier, the containment vessel, was compromised, resulting in the leakage of radioactive material. [0003] The containment filtration and discharge system adopts an active pressure relief method to release the gas accumulated in the containment and ...

AI Technical Summary

Problems solved by technology

[0005] Venturi scrubbers are widely used in foreign reactor containment filtration systems. For example, in US Patent No. US07 / 171,656, it is mentioned that Venturi scrubbers are used for filtration, but there is no specific structure for Venturi scrubbers. Describe, especially the structure of the Venturi tube

The specific structure of the Venturi water scrubber used in industry is mentioned in the latest patent, such as the "Venturi tube gas scrubber" described in the patent 201120362897.4, which is mainly used for industrial dust removal. When using multiple nozzles, this makes the structure of the Venturi gas scrubber too complex, resulting in excessive loss of dynamic pressure head during the gas flow process, resulting in insufficient penetration depth of the washing solution

And the device can not adjust the amount of solution injection according to different working conditions

And it uses external power to spray the solution into the Venturi tube, and the Venturi tube operates under non-submerged conditions, but the reactor containment system generally requires that the filter device can operate under passive and submerged conditions , so the industrial Venturi tube cannot be used in the containment filter discharge system

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