Storehouse type coal-burning boiler few-oil ignition combustion system

Abstract

This invention declares a low-oil-consumption ignition and combustion system of storage style coal fired boiler. The outlet of the primary coal mill is connected to the finely-pulverized coal separator, which is connected to the outer primary air pipe of the combustor through the primary air main pipe; the finely-pulverized coal separator is in parallel with the ultra fine powder separator that is connected to the inner primary air pipe of the combustor through the primary air accessory pipe. An oil gun is positioned inside the outlet section of the inner primary air pipe. The primary air main pipe and the primary air accessory pipe are connected by the pipeline on which the pipeline valve is positioned. The accessory air pipe valve is installed on the primary air accessory pipe before the pipeline valve. This invention has a simple structure, realizes the separate combustion of thick and fine coal powder, which increases the stability of ignition and low load operation and saves fuel oil and power generating cost.

Description

Technical field [0001] The invention belongs to the technical field of ignition and combustion devices for thermal power generation, and specifically relates to a storage-type coal-fired boiler low-oil ignition and combustion system for boiler ignition in thermal power plants. Background technique [0002] As a large consumer of fuel oil, thermal power plants consume a large amount of fuel oil for boiler ignition and stable combustion every year. According to data from the National Development and Reform Commission, the annual fuel consumption of generator sets in my country is as high as 7.6 million tons, equivalent to RMB 41.8 billion. my country is an oil-poor country. In 2004, oil consumption was 317 million tons, domestic production was 176 million tons, net import was 151 million tons, and its foreign dependence reached 47.3%. Therefore, reducing power generation fuel consumption is of great significance for reducing power generation costs, improving the economic benefits o...

AI Technical Summary

Problems solved by technology

If the pulverized coal is too coarse, it will be difficult to achieve full combustion at the initial stage of ignition, and a large amount of fuel oil will be consumed, which will greatly increase the fuel consumption; Tube explosion on the heating surface affects the safe operation of the power plant

[0005] Disadvantages of the existing warehouse-type coal-fired boiler with low oil ignition and combustion system: in the initial stage of ignition and combustion of the boiler in the power plant and during low-load operation, the combustion is unstable and the oil consumption is large; Easy to coke

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