An integrated device and method for a high-sodium coal heating removal furnace and a coal-fired power station

Abstract

The invention provides a high-sodium coal heating removing furnace and coal-fired power plant integrating device and a method thereof. The high-sodium coal heating removing furnace and coal-fired power plant integrating device comprises a high-sodium coal heating removing furnace system and a coal-fired power plant system. The high-sodium coal heating removing furnace system comprises a high-sodium coal heating removing furnace, a liquid-solid separator, a water-coal-slurry preparing unit, an alkali metal solution recycling treatment system, a pulverized coal drying device and a smoke spraying cooling and heat recycling device. The upper end of the high-sodium coal heating removing furnace is connected with the water-coal-slurry preparing unit, and the lower portion of the high-sodium coal heating removing furnace is connected with the liquid-solid separator. One end of the liquid-solid separator is connected with the pulverized coal drying device, and the other end of the liquid-solid separator is connected with the alkali metal solution recycling treatment system. The pulverized coal drying device is connected with the smoke spraying cooling and heat recycling device. The smoke spraying cooling and heat recycling device is connected with the alkali metal solution recycling treatment system. The alkali metal solution recycling treatment system is connected with the water-coal-slurry preparing unit. According to the key point of the problem needing to be solved, the characteristics that the integrated high-sodium coal heating removing device is abundant in inlet and outlet and independent are fully utilized, the high-sodium coal heating removing device is integrated with a steam water circulation system and a fuel system in a fire coal technology system and smoke waste heat utilization, and the purposes of energy saving and environment friendliness are achieved.

Description

technical field [0001] The invention relates to a furnace and an integrated device thereof, in particular to an integrated method of an integrated high-sodium coal heating removal device in a coal-fired process system. Background technique [0002] High-sodium coal refers to a special type of coal with a high content of alkali metal compounds in coal. my country's high-sodium coal reserves are predicted to be as high as 390 billion tons, mainly concentrated in the Zhundong coalfield in Xinjiang. Zhundong coal is a high-quality coal with low ash content, high calorific value, and low degree of metamorphism. As a raw material for power generation or chemical industry, it has the characteristics of low pollution and low emission, and can effectively save the treatment cost of waste after combustion and transformation. A good material foundation has been laid. However, when high-sodium coal is burned and converted, it will cause serious contamination and alkaline corrosion to ...

AI Technical Summary

Problems solved by technology

Many studies and patents have proposed to use the high-temperature flue gas discharged from the boiler or the high-temperature and high-pressure steam in the steam turbine system to heat the coal-water slurry. This method increases the complexity of the system to some extent. Moreover, the high-temperature flue and high-temperature and high-pressure steam The transformation of the pipeline and the excessive integration with the sodium removal process increase the unreliability of the system operation and destroy the independence of the original system. In the event of local equipment or system failure, it is easy to cause the entire system to shut down, resulting in huge economic losses.

[0005] To sum up, desodium removal before combustion has the potential to completely improve the boiler operation quality. The current heating desodium process is over-integrated with the coal-fired process system, which affects the independence and reliability of the system operation.

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