Control system applied to dual-fuel accurate combustion of double-hearth lime kiln

A double-chamber lime kiln and control system technology, applied in the field of lime calcination, can solve the problems of restricting the promotion of double-chamber kilns, inability to use double-chamber kilns, and large changes in gas calorific value and pressure, reducing actions and interventions, liberating labor, The effect of reducing downtime

Pending Publication Date: 2020-10-30
石家庄圣宏达热能工程技术股份有限公司
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Problems solved by technology

Due to various major gas and pulverized coal, the calorific value pressure of gas varies greatly, and it is difficult to solve the problem of effective ratio combustion of the two fuels. At present, pure gas or pulverized coal is generally used as fuel for calcination at home and abroad, and the calorific value is lower than 1800kcal / Nm3 gas fuel and pulverized coal with a volatile content of less than 15% cannot be used in double-chamber kilns, which causes many restrictions on users and also limits the promotion of double-chamber kilns

Method used

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  • Control system applied to dual-fuel accurate combustion of double-hearth lime kiln
  • Control system applied to dual-fuel accurate combustion of double-hearth lime kiln
  • Control system applied to dual-fuel accurate combustion of double-hearth lime kiln

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Embodiment Construction

[0059] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention.

[0060] This application discloses a control system for dual-fuel precise combustion in a double-chamber lime kiln. According to changes in gas calorific value and flow rate, through external detection equipment and a mathematical model set in the program, real-time adjustment of gas and coal powder The dosage can achieve real-time optimization of the air-fuel ratio, ensure full combustion of fuel, and ensure that the heat required for lime calcination remains unchanged. Thereby reducing the shutdown rate of the double-chamber lime kiln, reducing human actions and interventions, and liberating the labor force. It can automatically adjust the supply of gas and pulveriz...

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Abstract

The invention relates to the technical field of lime calcination, in particular to a control system applied to dual-fuel accurate combustion of a double-hearth lime kiln. The system comprises an operator station, a PLC control system, a signal acquisition system and a control execution system. The signal acquisition system comprises a heat value analyzer, a gas flow meter and an optical pyrometer,the control execution system comprises a gas regulating valve, an air regulating valve and a rotary metering valve, the PLC control system receives signals of the signal acquisition system, the PLC control system transmits a signal to the control execution system, and the PLC control system is connected with the operator station through a switch and is used for transmitting signals to each other.According to the changes of supplied coal gas flow, heat value and kiln body temperature monitored by the signal acquisition system, the supply amount of coal gas and pulverized coal is automaticallyadjusted by controlling the execution system, and the combustion ratio is adjusted. The air-fuel ratio is rationalized through accurate control of double fuels of the double-hearth kiln during simultaneous combustion.

Description

technical field [0001] The invention relates to the technical field of lime calcination, in particular to a control system applied to dual-fuel precise combustion in a double-chamber lime kiln. Background technique [0002] As an internationally advanced lime calcination kiln, the double-chamber lime kiln has great advantages over other kiln types in terms of energy consumption and product quality, but the requirements for fuel are relatively high. Due to various major gas and pulverized coal, the calorific value pressure of gas varies greatly, and it is difficult to solve the problem of effective ratio combustion of the two fuels. At present, pure gas or pulverized coal is generally used as fuel for calcination at home and abroad, and the calorific value is lower than 1800kcal / Nm3 gas fuel and pulverized coal with a volatile content of less than 15% cannot be used in double-chamber kilns, which causes many restrictions on users and also limits the promotion of double-chamb...

Claims

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Application Information

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IPC IPC(8): C04B2/12C04B2/10
CPCC04B2/12C04B2/10
Inventor 张涛涛张辉宏丛柏松吴槟克史再锋
Owner 石家庄圣宏达热能工程技术股份有限公司
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