Non-coal leaking front air-outlet reciprocating grate segment for large suspension-type reciprocating grate

Abstract

The invention relates to a non-coal leaking front air-outlet reciprocating grate segment for a large suspension-type reciprocating grate, in particular to a non-coal leaking front air-outlet reciprocating grate segment which uses the principle of aerodynamics, is used on a 14-700MW large suspension-type industrial reciprocating grate boiler with an angle of inclination of 12 to 25 degrees, and belongs to the technical field of International Patent Classification F23H coal fired boilers. Orienting to the future, being used for the development of large or very large reciprocating grate boilers and solving the problems of no restriction by the random working condition changes of combustion air supply and the implementation of equal pressure air supply and the combustion air distribution of a grate segment crack air outlet and becoming the focus of large-scale development and research, the non-coal leaking front air-outlet reciprocating grate segment fully adopts the design of a variable cross section ventilation slot structure, a cross section is reduced along the ventilation direction, so that the combustion air flows to the grate crack outlet through the variable cross section ventilation slot and a ventilation dynamic back-pressure chamber, thereby changing the ventilation dynamic airflow of the ventilation dynamic back-pressure chamber and balancing the static pressure. The combustion air dynamic pressure is realized in the narrow strip structure of the grate segment, the combined encryption crack of the grate segment and a secondary control combustion air supply process, and the static pressure is kept balanced; and the combustion air equal pressure balanced air distribution is realized on the grate segment crack outlet, and directly actioned on a combustion coal layer.

Description

technical field [0001] The invention relates to a reciprocating fire grate piece before coal leakage, which is used on a 14-700MW large-scale suspended movable propulsion type industrial reciprocating fire grate boiler with an inclination angle of 12-15° by using the principle of aerodynamics and boiler combustion, and belongs to International patent classification F23H coal-fired boiler technical field. Background technique [0002] In this field, in the prior art, the grate boilers of small coal-fired reciprocating grate boilers are usually used below 14MW; they have been away from the market for many years. Because the reciprocating grate boiler is suitable for low-quality coal and plant fuels, it has attracted renewed attention when the energy is gradually facing the crisis of exhaustion. Therefore, the plant-fueled reciprocating grate boilers with foreign technology have been introduced at great cost, which are usually used in boilers below 46MW. Regardless of the tra...

AI Technical Summary

Problems solved by technology

In the face of the inevitable trend of the development of large-scale or super-large reciprocating grate boilers of 14MW-700MW or more in the future, the above problems are problems left over from history and fatal flaws, which seriously restrict the large-scale development of reciprocating grate boilers in the future

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