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factory and development of steam boiler

Despite a late start in China, but the circulating fluidized bed boiler fuel for its wide adaptability and excellent load regulation and strong environmental performance advantages in China has been developing rapidly, the current total of 35 to 1025 t / h evaporation of different circulating fluidized bed boiler nearly 3,000 units with a total installed capacity of nearly 40 million kilowatts. China has become the largest of the country's total installed capacity of the largest circulating fluidized bed boiler station number in the world. According to forecasts, our 75ton circulating fluidized bed boiler is expected in the "Eleventh Five-Year" for 18% compound growth rate, in 2010--2020 is expected to remain above 14% CAGR.

In order to improve ambient air quality in the region, Linfen City, Shanxi Province with the actual situation, issued a notice "Linfen City in 2019 iron and steel, coking industry depth reduction plan". "Program" is mentioned, requiring all enterprises in the implementation of the transformation process of governance, compliance with the target, select advanced, mature, stable, and reliable control technology implementation of the transformation.

1, the end of June 2019, to complete the iron making and steel making ultra-low emissions transformation; the end of October 2019, the completion of the sintering head (pellet sintering) transformation of the ultra-low emissions.

Acceptance criteria: sintering (pellet) smoke particulate matter, sulfur dioxide, nitrogen oxide emissions in the reference oxygen concentration of not higher than 16% under the conditions (18%) of 10mg /, 35mg /, 50mg / m3; iron, other processes steelmaking emissions of particulate matter, sulfur dioxide, nitrogen oxides emission concentration is not higher than a standard 10mg / m3,50mg / m3,200mg / m3 of.

2, before the end of October 2019, the city's iron and steel enterprises to fully complete management and monitoring of fugitive emissions, fugitive emissions control, control, governance intelligent integration platform built

Acceptance criteria: transformation, steel companies outside the main source of fugitive emissions at 1 m, the particle concentration is less than 5mg / m3; the concentration of particulate matter emissions by organized collection after treatment is less than 10mg / m3.

3, the end of June 2019, to complete the coke pushing, coke ultra-low emissions of other transformation step; the end of October 2019, to complete the transformation of ultra-low emissions oven chimney.

Acceptance criteria: coke chimney particulate matter, sulfur dioxide, nitrogen oxide emissions in the reference oxygen concentration of not higher than 10mg / m3,30mg / m3,130mg / m3 under the conditions of 8%; coke oven coal, coke pushing step particulate matter emission is not higher than a standard concentration of 10mg / m3 of.

4, before the end of October 2019, the city's coking enterprises fully completed fugitive emission control and monitoring, fugitive emissions control, control, governance intelligent integration platform.

Acceptance criteria: transformation, mainly coking fugitive emission sources outside 1 m, the particle concentration is less than 5mg / m3; the concentration of particulate matter emissions by organized collection after treatment is less than 10mg / m3.

Initiation of recording during expansion of the boiler as indicated in each component are pre Boiler Feed is cold, the expansion is zero, when the components affected Sheung water temperature, somewhat expanded. After the boiler ignition boosted at 0 ~ 0.49MPa pressure saturation temperature rises rapidly, the expansion value is larger, at 0.49MPa-9.8MPa pressure, the saturation temperature increased slowly, slowing down of the expansion, but the pressure is increased, stress increases. Since the boiler is a combination of many components, at various pressures, expansion of the recording indication, its purpose is to monitor whether the respective pressure member expand uniformly heated. The uneven expansion, easy to cause deformation and breakage of the device, sealing off and cracks, and cause leakage or even burst pipes. So to are recorded in different states indicate expansion, to monitor, analyze and identify problems. When the expansion is uneven, should take timely boost as slow, switching fire mouth, the sewage, drainage and other measures to eliminate the phenomenon of uneven expansion, the safe operation of the boiler.

The use of horizontal factory and development of steam boiler of the same type, each with four compressors, allows a fine performance gradation without loss in efficiency and load covering of still 66 % while failure of a machine. The use of the heat in the sewage flotation storage is discussed and prepared.

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