Header for 630 DEG C steam parameter power station boiler

Abstract

Disclosed is a header for a 630 DEG C steam parameter power station boiler. As for an existing boiler which has the maximum pressure and maximum temperature in the world, the steam temperature is 605/623/623 DEG C, generating coal consumption is 256.16 g/KWH, efficient utilization of coal energy is achieved, and with the development tendency of energy saving and emission reduction, further improving of parameters of a boiler unit becomes the inevitable requirement, and development of the 630 DEG C steam parameter power station boiler is imperative. The header for the 630 DEG C steam parameterpower station boiler is composed of a large header body (7) and a small header body (2). The large header body serves as a high-temperature steam gathering header, and the small header body serves asa high-temperature heating surface steam outlet header; the high-temperature heating surface steam outlet header is connected with a high-temperature heating surface pipe of the high-temperature heating surface steam outlet header through a set of pipe connectors A (1) and connected with pipe connectors C (5) through a set of pipe connectors B (3); and the pipe connectors C are connected with a large header connecting pipe (6), and the large header connecting pipe is connected with the high-temperature heating surface steam outlet header.

Description

Technical field: [0001] The invention relates to a header of a 630°C steam parameter power plant boiler. Background technique: [0002] Currently the boiler with the highest pressure, highest temperature and highest efficiency in the world, the steam temperature is 605 / 623 / 623°C, and the coal consumption for power generation is 256.16 grams per kWh, realizing the efficient utilization of coal energy. With the development trend of energy saving and emission reduction in our country, it is an inevitable requirement to further improve the parameters of boiler units, and it is imperative to develop power plant boilers with 630°C steam parameters. [0003] ℃Steam parameters Power plant boilers on the high-temperature heating surface steam outlet header pipe joint temperature will exceed 650 °C, the selection of martensitic heat-resistant steel header pipe joints cannot meet the long-term safe use requirements, so it is necessary to use austenitic stainless steel Boxes and pipe j...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a 630°C steam parameter boiler header to solve the problem of poor thermal fatigue resistance of the large-diameter tube austenitic stainless steel and martensitic heat-resistant steel connection structure, and to meet the 630°C steam parameter power station Requirements for Boiler Peak Shaving Performance and Unit Load Variation

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