Closed positive pressure cleaning device for tank

Abstract

The invention relates to a closed positive pressure cleaning device for a tank. The device comprises a compaction cap adapted and hermetically connected with the tank opening of the tank; a steam inlet pipe communicated to the interior of the tank and a blow-off pipe communicated to the bottom of the tank are arranged on the compaction cap; and after the positive pressure steam is used for cleaning the interior of the tank through the steam inlet pipe, the generated waste liquid or waste gas is discharged out of the tank by the blow-off pipe under the action of pressure in the tank. Because a positive pressure tank cleaning technology is adopted in the closed positive pressure cleaning device for the tank, the steam is utilized as fully as possible in the tank under the condition of ensuring that the pressure in the tank meets the equipment safety requirement, the heat energy using rate of the steam is improved, atmospheric pollution is reduced, and certain materials (such as oil, chemicals and the like) can be reclaimed.

Description

technical field [0001] The invention relates to a kind of airtight car washing equipment for freight tank cars, in particular to a kind of airtight positive pressure cleaning device for tanks. Background technique [0002] In rail freight or road freight, tank cars used for transport often require tank cleaning operations. At present, the cleaning tank has been using the open steam washing technology. Although this technology is widely used, because it adopts the open steam washing method and the tank mouth is open, so in the process of car washing, most of the steam will flow out of the tank mouth immediately after a certain small cycle in the tank. Volatile, resulting in low steam utilization. This not only wastes a lot of cleaning steam, but also it is difficult to steam clean some positions in the tank. [0003] In summary, the existing open tank cleaning device and technology mainly have the following technical defects: [0004] 1) The steam utilization rate is low,...

AI Technical Summary

Problems solved by technology

[0004] 1) The steam utilization rate is low, the waste of steam is large, and the cost of car washing is high;

[0005] 2) The temperature in the tank generally can only reach about 80-90°C, which makes it difficult to cook some parts in the tank;

[0006] 3) The cooking time is long, the efficiency of car washing is low, and the work intensity of workers is relatively high;

[0007] 4) The residual items (oil, chemicals, etc.) in the tank volatilize with the steam from the tank mouth to the atmosphere, causing serious air pollution, poor working environment on site, and affecting the safety of operators;

[0008] 5) When washing the tank, the steam noise is loud

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