Liquid-solid direct contact steam generator

Abstract

The invention belongs to the field of energy resources and environment, and particularly relates to a liquid-solid direct contact steam generator. The liquid-solid direct contact steam generator comprises a plurality of arranged pressure pipelines provided with spiral conveyors; each pressure pipeline is connected with a solid particle pipeline and a steam pipeline; a liquid pipeline is arranged at the end part of each pressure pipeline; each liquid pipeline is positioned at the end part close to the corresponding steam pipeline; a particle discharging hole is formed in each pressure pipelineclose to one end of the corresponding liquid pipeline; and valves are arranged on each of the solid particle pipelines, the steam pipelines, the liquid pipelines and the particle discharging holes. According to the liquid-solid direct contact steam generator, heat exchange is performed in a manner that hot solid particles are in direct contact with a liquid; the hot solid particles directly transfer heat to the liquid so that the liquid becomes into steam, and the heat does not pass through an additional wall surface; and therefore, a heat exchange coefficient can be improved remarkably, the heat exchange efficiency can be improved, and the loss of a heat exchange wall surface can be avoided. Under the same heat exchange amount, the volume of the liquid-solid direct contact steam generatoris remarkably smaller than that of the conventional steam generator, thereby reducing the manufacturing and operating cost.

Description

technical field [0001] The invention relates to a steam generator in direct contact with liquid and solid, belonging to the field of energy and environment. Background technique [0002] Hot solid particles widely exist in various production links of power plants, steel mills, and petrochemical industries. The slag discharge temperature of power plant boilers is above 800 degrees, and the temperature of blast furnace ironmaking slag in steel mills is around 1500 degrees. Calcined petroleum coke in petrochemical enterprises also has a very High temperature, the recovery of waste heat of these high-temperature solid particles is of great significance for energy saving. At present, various forms of partition-type high-temperature solid particle heat exchangers or regenerative heat exchangers are used to recover the waste heat of solid materials. [0003] The disadvantages of the above-mentioned solid particle waste heat recovery technology using partition wall heat exchangers a...

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Problems solved by technology

[0003] The disadvantages of the solid particle waste heat recovery technology using partition wall heat exchangers above are that the investment in the initial construction or upgrading of equipment is huge, the recovery period is long, and solid particles will cause serious wear and tear on the heat exchange surface and channel blockage, and the life of the equipment is difficult to guarantee. When the temperature of the hot solid particles is not too high, the recovery efficiency drops severely, without any economical

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