Method for determining coal slurry pipeline transportation concentration in coal slurry fluidized bed boiler feeding system

A fluidized bed boiler and pipeline transportation technology, applied in the field of control, can solve problems such as high operating costs, affecting the calorific value of coal slime, and reducing boiler combustion efficiency

Inactive Publication Date: 2011-01-12
HUZHOU YUANTE NEW MATERIALS
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Problems solved by technology

First, the price of the pump is very expensive, and second, the running cost is very high
The water content in the coal slime is too high, the energy consumption of the coal slime transportation process is greatly r...

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  • Method for determining coal slurry pipeline transportation concentration in coal slurry fluidized bed boiler feeding system
  • Method for determining coal slurry pipeline transportation concentration in coal slurry fluidized bed boiler feeding system
  • Method for determining coal slurry pipeline transportation concentration in coal slurry fluidized bed boiler feeding system

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Embodiment Construction

[0048] A method for determining the concentration of coal slime pipeline transport in a coal slime fluidized bed boiler feeding system, the specific steps are as follows:

[0049] Step 1. Establish the pressure loss and power consumption model of coal slime pipeline transportation; coal slime presents typical non-Newtonian fluid characteristics in the process of pipeline wet transportation, and the shear stress τ w with shear rate S w Satisfy:

[0050] τ w = μ dV dy = μS w - - - ( 1 )

[0051] Where V is the slime flow rate, Indicates the velocity gradient, and μ is the apparent viscosity.

[0052] When the slime concentration is high, the rheological properties of the slime conform to the characteristics of yield-pseudoplastic fluid, and its power law constitutive equation is desc...

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Abstract

The invention relates to a method for determining coal slurry pipeline transportation concentration in a coal slurry fluidized bed boiler feeding system. According to the feeding characteristics of the coal slurry fluidized bed boiler, the method respectively establishes a model of coal slurry pipeline wet-process transportation pressure-loss and power-consumption, a model of boiler load and coalslurry heat energy-balance equation model, a relational model of boiler efficiency and coal slurry water content and the like, and provides an optimal objective in which the coal slurry transportation power consumption and the minimal cost loss of coal slurry raw materials are comprehensively considered. Thus, the invention establishes a total optimal proposition. The optimal coal slurry transportation concentration is obtained by using the optimal solution through nonlinear sequence quadratic programming algorithm. The invention can be used for operation optimization of the coal slurry fluidized bed feeding system, and can be also used for design optimization and equipment selection in the design process of the coal slurry fluidized bed feeding system, thereby having important practical meaning and application value.

Description

technical field [0001] The invention belongs to the technical field of control, and relates to a method for determining the concentration of coal slime pipeline transport in a coal slime fluidized bed boiler feeding system. This method comprehensively considers the energy consumption during the coal slime pipeline transportation process and the energy consumption caused by the moisture content in the coal slime boiler combustion process, and determines the optimal water content of the coal slime based on the minimization of energy consumption on the basis of modeling. Background technique [0002] Coal slime power generation is the most effective way to solve the problem of resource utilization of coal slime and coal gangue. To achieve this goal, the low calorific value boiler combustion technology must be solved first. For this reason, the country has invested a lot of money and manpower for more than 20 years from the "Sixth Five-Year Plan" to the "Ninth Five-Year Plan". A...

Claims

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Application Information

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IPC IPC(8): G06F17/50
Inventor 江爱朋陈红邵兵范家峰张日东
Owner HUZHOU YUANTE NEW MATERIALS
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