Special combustion chamber for supercharged boiler test bed

Abstract

A special combustion chamber for a supercharged boiler test bed comprises an inner chamber and an outer shell. The left side of the inner chamber is provided with a connection port in connection with a combustor, and the right side of the inner chamber is provided with a connection port in connection with a tail flue. The left side of the outer shell is provided with a main cooling air inlet, a fixed partition plate is arranged between the left side of the outer shell and the left side of the inner chamber and provided with cooling air inlet guide holes, and the right side of the inner chamber is provided with cooling air outlet guide holes. Each of the outer shell and the inner chamber is provided with a pressure sensor and a temperature sensor. The inner chamber is provided with an observation hole and an emergency discharge port. High-temperature high-pressure flue gas in the inner chamber and cooling air in a cooling interlayer are mixed to push a turbocharger to operate normally, and flue gas temperature and pressure can be controlled precisely; by main and auxiliary flow guide holes for realizing mixing of the flue gas in the inner chamber and the cooling air, uniformity in mixing is guaranteed while pressure of the combustion chamber can be stabilized; heating surface replacement can be realized only by demounting from a flange position without influences of a combustion chamber structure.

Description

technical field [0001] The invention relates to a special furnace for a pressurized boiler test bench. Background technique [0002] A booster boiler refers to a boiler that uses a compressor instead of a blower to deliver combustion-supporting air to the boiler furnace. The combustion process of the fuel in the furnace and the heat exchange process of the flue gas on the heating surface of the furnace are carried out at a pressure higher than atmospheric pressure (generally reaching 0.2MPa-0.5MPa). The supercharging promotes the combustion of fuel and the heat transfer process in the furnace, which can effectively improve the efficiency of the boiler; at the same time, the supercharging strengthens the mixing of fuel and air, promotes the full combustion of fuel, and is conducive to reducing the emission of pollutants. In addition, due to the high heat transfer efficiency of the booster boiler, it can increase the heat load of the boiler heating surface and increase the he...

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Problems solved by technology

[0003] But on the other hand, there is a big difference between a pressurized boiler and a normal pressure boiler. Because the heat load of the furnace volume of a pressurized boiler is much higher than that of a conventional boiler, many key technologies such as combustion, heat transfer, flow, material, and performance matching are caused. Different from conventional boilers; moreover, the flue gas turbocharger unit used for boiler air supply integrates compressor, flue gas turbine and various auxiliary systems. The structure, system and regulation of the device are relatively complicated, so its start-up performance, Thermal properties, combustion properties, etc. are the focus of in-depth research

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