Low-energy-consumption and long-distance steam conveying device

Abstract

The invention discloses a low-energy-consumption and long-distance steam conveying device. The device comprises an overhead steam pipeline and / or a buried steam pipeline, a dewatering device and a matched anti-seismic insulated pipe support. The overhead steam pipeline comprises at least two insulating layers, at least one reflecting layer, a waterproof insulating layer and a protecting layer. The buried steam pipeline comprises a hot-melting frictional layer, at least one insulating layer, at least one reflecting layer, a supporting layer, a jacket steel pipe and a polyurea anticorrosive coating. By means of the low-energy-consumption and long-distance steam conveying device, heat loss in the high-temperature steam conveying process can be effectively lowered, and the safety of the pipeline system is guaranteed; meanwhile, energy benefits are increased, and the production cost of heat consumers is lowered. When loads conveyed by the steam pipeline reach 30% of design loads, the temperature of steam is lowered by 3-5 DEG C per kilometer from the conventional design that the temperature is lowered by 15-20 DEG C per kilometer, and the conveying distance of the steam can reach 30-40 kilometers. Besides, drainage of the steam pipeline is safer and more efficient. The steam pipeline can be supported in a more energy-saving mode, and meanwhile the multiple functions of shock resistance and sound absorption are achieved.

Description

technical field [0001] The invention belongs to the technical field of thermal energy engineering, and relates to a long-distance transportation device with low energy consumption for steam, and in particular to the thermal insulation technology of overhead steam pipelines and the thermal insulation technology of buried steam pipelines. Background technique [0002] With the expansion of the scope of central heating, especially in the steam heating system, the heating radius is getting longer and longer, and the requirements for temperature drop are getting higher and higher. According to the current conventional design, the temperature drop per kilometer of the steam pipeline is as high as 15-20°C, and the heat loss of the pipeline reaches 10-20%, or even more. On the one hand, it causes a huge waste of energy; on the other hand, because the steam temperature drop is too large to meet the user's requirements, it is necessary to run the steam turbine with reduced parameters ...

AI Technical Summary

Problems solved by technology

However, impurities in the medium, such as welding slag, are easily brought into the drain device and cause blockage of the drain pipe.

At present, most of the hydrophobic devices on the market fail to effectively filter the impurities in the medium, which affects the hydrophobic effect and brings risks to the operation of the steam pipeline

[0005] At the same time, during the operation of the steam pipeline, due to the existence of condensed water or the adjustment of the steam load, the vibration of the pipeline is unavoidable

The traditional heat insulation support often ignores the anti-vibration ability, and its heat insulation block is easy to crack and damage under the action of vibration load, which also brings safety hazards while heat leakage

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