A system for generating soot-blowing steam source using steam jet flow technology

Abstract

The invention discloses a system for generating a soot blowing steam source through steam ejection flow technology. The source of the soot blowing steam source comprises the two branches of a high-pressure low-temperature steam source and a low-pressure high-temperature steam source. Through steam ejection technology, low-pressure steam is ejected through high-pressure steam, and control over the flow proportion of the two streams of steam and the pressure and temperature of mixed steam is achieved. The mixed steam can also be further adjusted in a mixed steam pipeline through a mixed steam pressure adjusting valve to obtain the parameters meeting the requirements of steam soot blowing of a soot blower finally. The system has the characteristics that the steam source composition is flexible, the system is simple, and the soot blowing adaptability is high. The system is suitable for design and usage of a soot blowing steam source of a soot blowing system of a newly built power station boiler and also suitable for transformation of a soot blowing steam source of an in-service unit. The energy consumption of boiler steam soot blowing can be lowered significantly, deep energy saving of a power station boiler is helped to be achieved, the safety of boiler steam soot blowing is also improved, and soot blowing repair and maintenance workload and cost are reduced.

Description

technical field [0001] The invention belongs to the technical field of coal-fired power generation, and in particular relates to a system for generating soot-blowing steam sources by using steam jet flow technology. Background technique [0002] Steam soot blowing of power plant boilers is a routine operation measure to remove slagging on the furnace and heating surfaces. Traditional pulverized coal power plant boilers generally use superheated steam as the source of soot blowing steam. The main characteristic of this steam source is that the pressure is relatively high, and it is usually necessary to reduce the temperature and pressure of the steam through the valve in the temperature and pressure reduction station before it is used for steam soot blowing, which may easily cause problems such as relatively low steam superheat and unstable steam soot blowing pressure; On the other hand, superheated steam is the primary steam of power plant boilers. The steam quality is relat...

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Problems solved by technology

The main characteristic of this steam source is that the pressure is relatively high, and it is usually necessary to reduce the temperature and pressure of the steam through the valve in the temperature and pressure reduction station before it is used for steam soot blowing, which may easily cause problems such as relatively low steam superheat and unstable steam soot blowing pressure; On the other hand, superheated steam is the primary steam of power plant boilers. The steam quality is relatively high, and the workmanship and power generation capacity is strong. The steam used for steam soot blowing consumes high energy consumption; The wear and erosion of pipelines are also serious, the workload of equipment maintenance is large, the cost is high, and the reliability of equipment is relatively low

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