Method for calculating steel ball loading capacity of coal mill in thermal power generation boiler

Abstract

A method for calculating the steel ball loading capacity of a coal mill in a thermal power generation boiler comprises the steps that the calculation equation of the steel ball loading capacity m of the steel ball coal mill is k4*mk5+k6*mk5-1=k7*I / (Bm*h), wherein m is the steel ball loading capacity of the steel ball coal mill, h is a raw coal blending HGI hardness coefficient of a coal pulverizing system and a boiler combustion system, I is current of the steel ball coal mill, Bm is output of the steel ball coal mill, and k4, k5, k6 and k7 are undetermined coefficients; the problem that in the production site, raw coal blending hardness cannot be obtained can be effectively solved; meanwhile, according to online data of the current and the output of the steel ball coal mill, the steel ball loading capacity of the running steel ball coal mill can be rapidly evaluated, running maintenance persons can be guided to reasonably organize steel ball loading of the coal mill according to the optimum steel ball loading amount of the coal mill, and therefore the output of the steel ball coal mill can be effectively improved; and the current of the steel ball coal mill is controlled, running parameters of the coal pulverizing system can be optimized in an online manner, the economy of the coal pulverizing system of the thermal power generation boiler can be improved, and the effects of saving energy and reducing the consumption are achieved.

Description

1. Technical field

[0001] The patent of the present invention relates to a method for calculating the steel ball load of a coal mill, especially a calculation method for the steel ball load of a coal mill used in thermal power boilers. 2. Background Technology

[0002] The safety and economy of thermal power plant unit operation mainly depend on the boiler system, and the factor that affects the safety and economy of boiler system operation is the coal-fired pulverization system of the boiler. The task of the thermal power plant pulverization system is to set it as a boiler Provide pulverized coal that meets the combustion requirements in quantity and quality. The existing pulverized coal preparation systems of thermal power generation enterprises are mainly divided into the following categories: (1) medium storage steel ball coal mill system; (2) direct blowing double-inlet and double-outlet steel ball coal mill system; (3) direct blowing type Medium speed pulverizer syste...

Examples

Embodiment Construction

[0060] The present invention will be further described below in conjunction with the examples, and the following examples are intended to illustrate the present invention rather than further limit the present invention.

[0061] First embodiment of the present invention, technical solution of the present invention, its steps are:

[0062] first step:

[0063] Calculation equation for the steel ball loading m of the steel ball coal mill: k4×m k5 + k6×m k5-1 =k7×I / (Bm×h),

[0064] in:

[0065] m is set as the steel ball loading capacity of the steel ball coal mill,

[0066] h is set as the HGI hardness coefficient of raw coal mixed in the pulverizing system and boiler combustion system;

[0067] I is set as the current of the ball mill,

[0068] Bm is set as the output of the steel ball coal mill,

[0069] k4, k5, k6, k7 are undetermined coefficients respectively;

[0070] Steady-state data extraction: Select the steel ball coal mill operation data from the PI history st...

1. Technical field

[0001] The patent of the present invention relates to a method for calculating the steel ball load of a coal mill, especially a calculation method for the steel ball load of a coal mill used in thermal power boilers. 2. Background Technology

[0002] The safety and economy of thermal power plant unit operation mainly depend on the boiler system, and the factor that affects the safety and economy of boiler system operation is the coal-fired pulverization system of the boiler. The task of the thermal power plant pulverization system is to set it as a boiler Provide pulverized coal that meets the combustion requirements in quantity and quality. The existing pulverized coal preparation systems of thermal power generation enterprises are mainly divided into the following categories: (1) medium storage steel ball coal mill system; (2) direct blowing double-inlet and double-outlet steel ball coal mill system; (3) direct blowing type Medium speed pulverizer syste...

Examples

Embodiment Construction

[0060] The present invention will be further described below in conjunction with the examples, and the following examples are intended to illustrate the present invention rather than further limit the present invention.

[0061] First embodiment of the present invention, technical solution of the present invention, its steps are:

[0062] first step:

[0063] Calculation equation for the steel ball loading m of the steel ball coal mill: k4×m k5 + k6×m k5-1 =k7×I / (Bm×h),

[0064] in:

[0065] m is set as the steel ball loading capacity of the steel ball coal mill,

[0066] h is set as the HGI hardness coefficient of raw coal mixed in the pulverizing system and boiler combustion system;

[0067] I is set as the current of the ball mill,

[0068] Bm is set as the output of the steel ball coal mill,

[0069] k4, k5, k6, k7 are undetermined coefficients respectively;

[0070] Steady-state data extraction: Select the steel ball coal mill operation data from the PI history st...