CN103307627B - Temperature control device of flue gas desulfurizing and acid-making hot blast stove and control method - Google Patents
Temperature control device of flue gas desulfurizing and acid-making hot blast stove and control method Download PDFInfo
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- CN103307627B CN103307627B CN201310218547.4A CN201310218547A CN103307627B CN 103307627 B CN103307627 B CN 103307627B CN 201310218547 A CN201310218547 A CN 201310218547A CN 103307627 B CN103307627 B CN 103307627B
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Abstract
A temperature control device of a flue gas desulfurizing and acid-making hot blast stove comprises a programmable controller, wherein a coke oven gas pressure regulating valve, a coke oven gas pressure sensor, a coke oven gas flow sensor and a coke oven gas flow regulating valve are mounted on a coke oven gas inlet pipeline; a combustion air flow sensor and a combustion air flow regulating valve are mounted on a combustion air inlet pipeline; a temperature sensor and a pressure sensor are mounted on the flue gas desulfurizing and acid-making hot blast stove; and the programmable controller exchanges signals with the coke oven gas pressure regulating valve, the coke oven gas pressure sensor, the coke oven gas flow sensor and the coke oven gas flow regulating valve on the coke oven gas inlet pipeline, exchanges signals with the combustion air flow sensor and the combustion air flow regulating valve on the combustion air inlet pipeline, and exchanges signals with the hot blast stove temperature sensor and the hot blast stove pressure sensor on the flue gas desulfurizing and acid-making hot blast stove. The temperature control device of the flue gas desulfurizing and acid-making hot blast stove can quickly and accurately control the temperature and the pressure of the hot blast stove, so that the hot blast stove can meet flue gas desulfurizing and acid-making requirements of a sintering machine.
Description
technical field:
What the present invention relates to is a kind of flue gas desulfurization relieving haperacidity hot-blast furnace temperature Controlling Technology, belongs to Test and control field.
Background technology
In flue gas of sintering machine acid manufacturing processes, the SO of Dissociative adsorption in active carbon
2need the hot blast of constant temperature, hot blast is burnt in proportion by coke-stove gas and combustion air and obtained, and meet the hot blast of Analytic Tower temperature requirement.But the pressure of coke-stove gas and combustion air and the temperature of coke-stove gas all unstable, disturbance is many, mutual coupling, control system in the prior art, the problem that the online temperature detection of hot-blast stove is too delayed can not be solved, temperature can not be solved and regulate influencing each other between pressure adjustment, therefore, the control accuracy of system Dynamic Regulating Process is low, can not meet thermostatic hot-air requirement.
Summary of the invention
The object of this invention is to provide the temperature and pressure that can control hot-blast stove rapidly and accurately, make it the requirement meeting flue gas of sintering machine relieving haperacidity.
Technical scheme of the present invention
A kind of flue gas desulfurization relieving haperacidity hot-blast furnace temperature control device, the flue gas desulfurization relieving haperacidity hot-blast stove comprising Programmable Logic Controller, coke-stove gas input channel, combustion air input channel and be connected with two kinds of gas feeding duct, is characterized in that on coke-stove gas input channel, be provided with coke-stove gas pressure-regulating valve, coke-stove gas pressure sensor, coke gas flow sensor and coke gas flow control valve; Combustion air input channel is provided with combustion-supporting air flow quantity sensor and combustion-supporting air flow adjustable valve; Flue gas desulfurization relieving haperacidity hot-blast stove is provided with hot-blast furnace temperature sensor and hot-blast stove pressure sensor; Coke-stove gas pressure-regulating valve, coke-stove gas pressure sensor, coke gas flow sensor, coke gas flow control valve, combustion-supporting air flow quantity sensor, combustion-supporting air flow adjustable valve, hot-blast furnace temperature sensor and hot-blast stove pressure sensor carry out signal handing-over by control signal wire and this Programmable Logic Controller.
Described Programmable Logic Controller comprises analog input function blocks, coke-stove gas pressure control function block, hot-blast stove pressure control function block, hot-blast stove actual temperature forecast function block, hot-blast furnace temperature control function block, uneoupled control functional block, coke gas flow control function block and combustion air flow control function block, and the output of analog input function blocks connects the input of coke-stove gas pressure control function block, the input of hot-blast stove pressure control function block and the input of hot-blast stove actual temperature forecast function block respectively; The output of coke-stove gas pressure control function block connects coke-stove gas pressure-regulating valve; The output of hot-blast stove pressure control function block connects an input of uneoupled control functional block; The output of hot-blast stove actual temperature forecast function block connects the input of hot-blast furnace temperature control function block, and the output of hot-blast furnace temperature control function block connects another input of uneoupled control functional block; The output of uneoupled control functional block connects the input of coke gas flow control function block and the input of combustion air flow control function block respectively; The output of coke gas flow control function block connects coke gas flow control valve; The output of combustion air flow control function block connects combustion-supporting air flow adjustable valve.
A kind of flue gas desulfurization relieving haperacidity hot-blast furnace temperature control method, is characterized in that the valve position value of the coke-stove gas force value of the valve position value of the coke-stove gas pressure-regulating valve that coke-stove gas input channel transmits, coke-stove gas pressure sensor, the coke gas flow value of coke gas flow sensor and coke gas flow control valve, by the combustion-supporting air flow value of the combustion-supporting air flow quantity sensor that combustion air input channel transmits and the valve position value of combustion-supporting air flow adjustable valve, by the temperature of the hot-blast furnace temperature sensor that flue gas desulfurization relieving haperacidity hot-blast stove transmits and the force value of hot-blast stove pressure sensor, input to programmable controller analog quantity input processing simultaneously, coke-stove gas Stress control is exported in analog input process respectively, hot-blast stove Stress control and the prediction of hot-blast stove actual temperature, the hot-blast furnace temperature of exporting to of hot-blast stove actual temperature prediction controls, the output that hot-blast furnace temperature controls and hot-blast stove is pressure controlled exports to uneoupled control, uneoupled control accepts the output of proportioning self-optimizing control simultaneously, the output of uneoupled control controls to coke gas flow respectively and combustion air flow controls, the output that coke gas flow controls and combustion air flow controls controls coke gas flow control valve and combustion-supporting air flow adjustable valve respectively, the pressure controlled output of coke-stove gas controls coke-stove gas pressure-regulating valve.
Programmable Logic Controller of the present invention carries out the prediction of current actual temperature according to the temperature of on-line checkingi, and controls according to predicted value, overcomes hot-blast furnace temperature and detects the delayed impact on control system response speed; The pressure and temperature control of hot-blast stove of the present invention, regulates with coke gas flow and combustion air flow regulates and forms the two serials control pattern of decoupling zero, overcomes influencing each other of hot-blast furnace temperature and pressure, and accelerates response speed; Programmable Logic Controller, according to the current optimum proportioning of latest history data Automatic-searching, improves fast-response energy and the adaptive capacity of system, adds and control the dynamic accuracy in adjustment process, improve the overall control accuracy of system; Therefore can control the temperature and pressure of hot-blast stove rapidly and accurately, make it the requirement adapting to flue gas of sintering machine relieving haperacidity.Visible, the present invention compared with prior art, has technological progress significantly.
Accompanying drawing explanation
Fig. 1 is the structural representation of flue gas desulfurization relieving haperacidity hot-blast furnace temperature control device of the present invention.Fig. 2 is computer-controlled model schematic diagram of the present invention.In figure, 1 is coke-stove gas input channel, 2 is combustion air input channel, and 3 is coke-stove gas pressure-regulating valve, and 4 is Programmable Logic Controller, 5 is combustion-supporting air flow quantity sensor, 6 is coke-stove gas pressure sensor, and 7 is coke gas flow sensor, and 8 is coke gas flow control valve, 9 is combustion-supporting air flow adjustable valve, 10 is hot-blast furnace temperature sensor, and 11 is hot-blast stove pressure sensor, and 12 is flue gas desulfurization relieving haperacidity hot-blast stove.
Detailed description of the invention
Embodiment: shown in Fig. 1, flue gas desulfurization relieving haperacidity hot-blast furnace temperature control device, the flue gas desulfurization relieving haperacidity hot-blast stove 12 comprising coke-stove gas input channel 1, combustion air input channel 2 and be connected with two gas inlet pipe roads, this programme is, on coke-stove gas input channel l, coke-stove gas pressure-regulating valve 3, coke-stove gas pressure sensor 6, coke gas flow sensor 7 and coke gas flow control valve 8 are housed; Combustion air input channel 2 is equipped with combustion-supporting air flow quantity sensor 5 and combustion-supporting air flow adjustable valve 9; Flue gas desulfurization relieving haperacidity hot-blast stove 12 is equipped with hot-blast furnace temperature sensor 10 and hot-blast stove pressure sensor 11; In addition, there are a Programmable Logic Controller 4 and coke-stove gas pressure-regulating valve 3, coke-stove gas pressure sensor 6, coke gas flow sensor 7 and the coke gas flow control valve 8 on coke-stove gas input channel l, with the combustion-supporting air flow quantity sensor 5 on combustion air input channel 2 and combustion-supporting air flow adjustable valve 9, signal is had to join with the hot-blast furnace temperature sensor 10 on flue gas desulfurization relieving haperacidity hot-blast stove 12 and hot-blast stove pressure sensor 11.
Described Programmable Logic Controller 4 comprises analog input function blocks, coke-stove gas pressure control function block, hot-blast stove pressure control function block, hot-blast stove actual temperature forecast function block, hot-blast furnace temperature control function block, uneoupled control functional block, coke gas flow control function block and combustion air flow control function block, and the output of analog input function blocks connects the input of coke-stove gas pressure control function block, the input of hot-blast stove pressure control function block and the input of hot-blast stove actual temperature forecast function block respectively; The output of coke-stove gas pressure control function block connects coke-stove gas pressure-regulating valve; The output of hot-blast stove pressure control function block connects an input of uneoupled control functional block; The output of hot-blast stove actual temperature forecast function block connects the input of hot-blast furnace temperature control function block, and the output of hot-blast furnace temperature control function block connects another input of uneoupled control functional block; The output of uneoupled control functional block connects the input of coke gas flow control function block and the input of combustion air flow control function block respectively; The output of coke gas flow control function block connects coke gas flow control valve; The output of combustion air flow control function block connects combustion-supporting air flow adjustable valve.
Can be found out by Fig. 2, in this programme, temperature control system is computerizedd control model, by the valve position value of the coke-stove gas pressure-regulating valve 3 that coke-stove gas input channel l transmits, the coke-stove gas force value of coke-stove gas pressure sensor 6, the coke gas flow value of coke gas flow sensor 7 and the valve position value of coke gas flow control valve 8, by the combustion-supporting air flow value of the combustion-supporting air flow quantity sensor 5 that combustion air input channel 2 transmits and the valve position value of combustion-supporting air flow adjustable valve 9, by the temperature of the hot-blast furnace temperature sensor 10 that flue gas desulfurization relieving haperacidity hot-blast stove 12 transmits and the force value of hot-blast stove pressure sensor 11, input to programmable controller analog quantity input processing functional block simultaneously, analog input function blocks exports to coke-stove gas Stress control respectively, hot-blast stove Stress control and hot-blast stove actual temperature predict each functional block, hot-blast stove actual temperature forecast function block export to hot-blast furnace temperature control function block, the output of hot-blast furnace temperature control function block and hot-blast stove pressure control function block export to uneoupled control functional block, uneoupled control functional block accepts the output of proportioning self-optimizing control functional block simultaneously, the output of uneoupled control functional block gives coke gas flow control function block and combustion air flow control function block respectively, the output of coke gas flow control function block and combustion air flow control function block controls coke gas flow control valve and combustion-supporting air flow adjustable valve respectively, the output of coke-stove gas pressure control function block controls coke-stove gas pressure-regulating valve.
The matching used software of the present embodiment has STEP7 V5.4; Communication between each functional module adopts inner direct addressing method.
Claims (2)
1. a flue gas desulfurization relieving haperacidity hot-blast furnace temperature control device, the flue gas desulfurization relieving haperacidity hot-blast stove comprising Programmable Logic Controller, coke-stove gas input channel, combustion air input channel and be connected with two kinds of gas feeding duct, is characterized in that: coke-stove gas pressure-regulating valve, coke-stove gas pressure sensor, coke gas flow sensor and coke gas flow control valve are housed on coke-stove gas input channel; Combustion air input channel is equipped with combustion-supporting air flow quantity sensor and combustion-supporting air flow adjustable valve; Flue gas desulfurization relieving haperacidity hot-blast stove is provided with hot-blast furnace temperature sensor and hot-blast stove pressure sensor; Coke-stove gas pressure-regulating valve, coke-stove gas pressure sensor, coke gas flow sensor, coke gas flow control valve, combustion-supporting air flow quantity sensor, combustion-supporting air flow adjustable valve, hot-blast furnace temperature sensor and hot-blast stove pressure sensor carry out signal handing-over by control signal wire and Programmable Logic Controller;
Described Programmable Logic Controller comprises analog input function blocks, coke-stove gas pressure control function block, hot-blast stove pressure control function block, hot-blast stove actual temperature forecast function block, hot-blast furnace temperature control function block, uneoupled control functional block, coke gas flow control function block and combustion air flow control function block, and the output of analog input function blocks connects the input of coke-stove gas pressure control function block, the input of hot-blast stove pressure control function block and the input of hot-blast stove actual temperature forecast function block respectively; The output of coke-stove gas pressure control function block connects coke-stove gas pressure-regulating valve; The output of hot-blast stove pressure control function block connects an input of uneoupled control functional block; The output of hot-blast stove actual temperature forecast function block connects the input of hot-blast furnace temperature control function block, and the output of hot-blast furnace temperature control function block connects another input of uneoupled control functional block; The output of uneoupled control functional block connects the input of coke gas flow control function block and the input of combustion air flow control function block respectively; The output of coke gas flow control function block connects coke gas flow control valve; The output of combustion air flow control function block connects combustion-supporting air flow adjustable valve.
2. adopt the control method of flue gas desulfurization relieving haperacidity hot-blast furnace temperature control device described in claim 1, it is characterized in that: the valve position value being uploaded to the coke-stove gas pressure-regulating valve of programmable controller analog quantity input processing functional block by coke-stove gas input channel, the coke-stove gas force value of coke-stove gas pressure sensor, the coke gas flow value of coke gas flow sensor and the valve position value of coke gas flow control valve, the combustion-supporting air flow value of the combustion-supporting air flow quantity sensor of programmable controller analog quantity input processing functional block and the valve position value of combustion-supporting air flow adjustable valve is uploaded to by combustion air input channel, the temperature of the hot-blast furnace temperature sensor of programmable controller analog quantity input processing functional block and the force value of hot-blast stove pressure sensor is uploaded to by flue gas desulfurization relieving haperacidity hot-blast stove, programmable controller analog quantity input processing functional block exports to coke-stove gas pressure control function block respectively, hot-blast stove pressure control function block and hot-blast stove actual temperature forecast function block, hot-blast stove actual temperature forecast function block export to hot-blast furnace temperature control function block, the output of hot-blast furnace temperature control function block and hot-blast stove pressure control function block export to uneoupled control functional block, uneoupled control functional block accepts the output of proportioning self-optimizing control simultaneously, the output of uneoupled control functional block gives coke gas flow control function block and combustion air flow control function block respectively, the output of coke gas flow control function block and combustion air flow control function block controls coke gas flow control valve and combustion-supporting air flow adjustable valve respectively, the output of coke-stove gas pressure control function block controls coke-stove gas pressure-regulating valve.
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| CN201310218547.4A CN103307627B (en) | 2013-06-04 | 2013-06-04 | Temperature control device of flue gas desulfurizing and acid-making hot blast stove and control method |
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| CN201310218547.4A CN103307627B (en) | 2013-06-04 | 2013-06-04 | Temperature control device of flue gas desulfurizing and acid-making hot blast stove and control method |
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| CN103307627B true CN103307627B (en) | 2015-05-20 |
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| CN112403180B (en) * | 2019-11-05 | 2022-06-03 | 中冶长天国际工程有限责任公司 | Centralized heating flue gas desulfurization and denitrification treatment system and method |
| CN112403179B (en) * | 2019-11-05 | 2022-05-03 | 中冶长天国际工程有限责任公司 | Shunting type flue gas desulfurization and denitrification treatment system and method |
| CN111707698B (en) * | 2020-07-16 | 2021-04-13 | 西安交通大学 | Experimental device and test method for high-temperature calcination reaction characteristics in flow and temperature cooperative alternating heating mode |
| CN113433987A (en) * | 2021-07-20 | 2021-09-24 | 山信软件股份有限公司 | Denitration reactor temperature control system and control method thereof |
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| US4489375A (en) * | 1982-04-12 | 1984-12-18 | Westinghouse Electric Corp. | Industrial process control apparatus and method |
| WO2004015333A2 (en) * | 2002-08-05 | 2004-02-19 | Merloni Termosanitari S.P.A. | Combustion control system with virtual lambda sensor |
| CN1676619A (en) * | 2005-05-26 | 2005-10-05 | 河北理工大学 | Blast furnace hot-blast stove combustion automatic control method based on example inference |
| CN101408314A (en) * | 2008-03-19 | 2009-04-15 | 首钢总公司 | Automatic control system of blast furnace hot blast stove combustion process |
| CN102364252A (en) * | 2011-11-14 | 2012-02-29 | 北京首钢自动化信息技术有限公司 | Automatic intelligent double cross limiting range combustion control method for heating furnace |
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2013
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4489375A (en) * | 1982-04-12 | 1984-12-18 | Westinghouse Electric Corp. | Industrial process control apparatus and method |
| WO2004015333A2 (en) * | 2002-08-05 | 2004-02-19 | Merloni Termosanitari S.P.A. | Combustion control system with virtual lambda sensor |
| CN1676619A (en) * | 2005-05-26 | 2005-10-05 | 河北理工大学 | Blast furnace hot-blast stove combustion automatic control method based on example inference |
| CN101408314A (en) * | 2008-03-19 | 2009-04-15 | 首钢总公司 | Automatic control system of blast furnace hot blast stove combustion process |
| CN102364252A (en) * | 2011-11-14 | 2012-02-29 | 北京首钢自动化信息技术有限公司 | Automatic intelligent double cross limiting range combustion control method for heating furnace |
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