Transformation method for solving problem of lower flue gas temperature of inlet of denitrification device of boiler in thermal power plant

A thermal power plant and denitrification technology, which is applied in separation methods, chemical instruments and methods, and dispersed particle separation, etc., can solve the problems of low inlet flue gas temperature and inability to operate SCR denitrification devices, and achieve the effect of ensuring normal operation.

Active Publication Date: 2015-07-22
SHANXI UNIV
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Problems solved by technology

[0006] In order to solve the problem that the SCR denitrification device cannot operate due to the low inlet smoke temperature of the SCR denitrification device,

Method used

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Embodiment Construction

[0019] A modification method for solving the problem of low inlet smoke temperature of boiler denitrification devices in thermal power plants, the method is realized by the following steps:

[0020] a. Collect thermal power plant data; the thermal power plant data includes: the annual unit load range of thermal power plants and the flue gas temperature at the outlet of the vertical low-temperature superheater, the flue gas temperature at the outlet of the horizontal low-temperature superheater, and the economizer under different unit loads outlet flue gas temperature;

[0021] b. Take the flue gas temperature at the outlet of the economizer as the ordinate, and the load of the unit as the abscissa, program it into the coordinate system of MATLAB, and use a smooth curve to fit it, and then determine the curve with the highest degree of fitting as the economizer The relationship curve between outlet flue gas temperature and unit load;

[0022] Determine the optimal reaction tem...

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Abstract

The invention relates to transformation technologies for denitrification devices of boilers in thermal power plants, in particular to a transformation method for solving the problem of the lower flue gas temperature of an inlet of a denitrification device of a boiler in a thermal power plant, and solves the problem that the SCR (selective catalytic reduction) denitrification device cannot run due to the lower flue gas temperature of the inlet of the SCR denitrification device. The transformation method for solving the problem of the lower flue gas temperature of the inlet of the denitrification device of the boiler in the thermal power plant comprises steps as follows: a, collecting data of the thermal power plant; b, taking the flue gas temperature of an outlet of an economizer as a Y-coordinate, taking the unit load as an X-coordinate, and incorporating the Y-coordinate and the X-coordinate into an MATLAB (matrix laboratory) coordinate system; c, additionally mounting a bypass flue between an inlet of a horizontal low-temperature superheater and the outlet of the economizer; d, introducing flue gas temperatures of an outlet of a vertical low-temperature superheater and flue gas temperatures of the outlet of the economizer under different unit loads into a thermal equilibrium equation; e, testing multiple kinds of fed coal actually used in the thermal power plant. The method is applicable to transformation of the denitrification device of the boiler in the thermal power plant.

Description

technical field [0001] The invention relates to a modification technology of a denitrification device of a thermal power plant boiler, in particular to a modification method for solving the problem of low inlet smoke temperature of the thermal power plant boiler denitrification device. Background technique [0002] At present, thermal power plants mostly use selective catalytic reduction (SCR) denitrification technology in terms of denitrification. Selective catalytic reduction (SCR) denitrification technology has become a relatively mature mainstream technology for denitrification of thermal power plant boilers at home and abroad because of its advantages such as high denitrification rate and stable operation. [0003] The tail heating surface of the thermal power plant boiler is generally arranged in the vertical shaft flue from high to low with a steering chamber, a vertical low temperature superheater, a horizontal low temperature superheater, an economizer, an SCR denit...

Claims

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Application Information

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IPC IPC(8): B01D53/90B01D53/56
Inventor 孟恩隆王灵梅苏鹏伟张宁
Owner SHANXI UNIV
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