CN103307627A - 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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- CN103307627A CN103307627A CN2013102185474A CN201310218547A CN103307627A CN 103307627 A CN103307627 A CN 103307627A CN 2013102185474 A CN2013102185474 A CN 2013102185474A CN 201310218547 A CN201310218547 A CN 201310218547A CN 103307627 A CN103307627 A CN 103307627A
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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 control technology, belongs to the Detection ﹠ Controling technical field.
Background technology
In flue gas of sintering machine relieving haperacidity process, resolve the SO that is adsorbed in the active carbon
2The hot blast that needs constant temperature, hot blast are to be burnt in proportion and obtained by coke-stove gas and combustion air, 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 are all unstable, disturbance is many, coupling mutually, control system in the prior art, the problem that the online temperature detection of hot-blast stove too lags behind can not be solved, influencing each other between the adjusting of adjustment and pressure can not be solved, therefore, the control accuracy of system's dynamic adjustments process is low, can not satisfy the constant temperature hot blast requirement.
Summary of the invention
The purpose of this invention is to provide the temperature and pressure that to control hot-blast stove rapidly and accurately, make it to meet the requirement of 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, comprise Programmable Logic Controller, coke-stove gas input channel, combustion air input channel and the flue gas desulfurization relieving haperacidity hot-blast stove that is connected with two kinds of gas inlet pipe roads, it is characterized in that at the coke-stove gas input channel coke-stove gas pressure-regulating valve, coke-stove gas pressure sensor, coke-stove gas flow sensor and coke-stove gas flow control valve being installed; At the combustion air input channel combustion-supporting air flow quantity sensor and combustion-supporting air flow adjustable valve are installed; At flue gas desulfurization relieving haperacidity hot-blast stove hot-blast furnace temperature sensor and hot-blast stove pressure sensor are installed; Coke-stove gas pressure-regulating valve, coke-stove gas pressure sensor, coke-stove gas flow sensor, coke-stove 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 the signal handing-over by control signal wire and this Programmable Logic Controller.
Described Programmable Logic Controller comprises analog quantity input function blocks, coke-stove gas pressure control function piece, hot-blast stove pressure control function piece, hot-blast stove actual temperature forecast function piece, hot-blast furnace temperature control functional block, decoupling zero control functional block, coke-stove gas flow control function piece and combustion air flow control functional block, and the output of analog quantity input function blocks connects the input of coke-stove gas pressure control function piece, the input of hot-blast stove pressure control function piece and the input of hot-blast stove actual temperature forecast function piece respectively; The output of coke-stove gas pressure control function piece connects the coke-stove gas pressure-regulating valve; The output of hot-blast stove pressure control function piece connects an input of decoupling zero control functional block; The output of hot-blast stove actual temperature forecast function piece connects the input of hot-blast furnace temperature control functional block, and the output of hot-blast furnace temperature control functional block connects another input of decoupling zero control functional block; The output of decoupling zero control functional block connects the input of coke-stove gas flow control function piece and the input of combustion air flow control functional block respectively; The output of coke-stove gas flow control function piece connects the coke-stove gas flow control valve; The output of combustion air flow control functional block connects the combustion-supporting air flow adjustable valve.
A kind of flue gas desulfurization relieving haperacidity hot-blast furnace temperature control method is characterized in that valve position value, the coke-stove gas force value of coke-stove gas pressure sensor, the coke-stove gas flow value of coke-stove gas flow sensor and the valve position value of coke-stove gas flow control valve of the coke-stove gas pressure-regulating valve that transmits on the coke-stove gas input channel; Valve position value by combustion-supporting air flow value and the combustion-supporting air flow adjustable valve of the combustion-supporting air flow quantity sensor that transmits on the combustion air input channel, by the temperature of the hot-blast furnace temperature sensor that transmits on the flue gas desulfurization relieving haperacidity hot-blast stove and the force value of hot-blast stove pressure sensor, inputing to the input of Programmable Logic Controller analog quantity simultaneously handles, the analog quantity input is handled and is exported to the control of coke-stove gas pressure respectively, the control of hot-blast stove pressure and the prediction of hot-blast stove actual temperature, the hot-blast furnace temperature of exporting to of hot-blast stove actual temperature prediction is controlled, the output of hot-blast furnace temperature control and hot-blast stove be pressure controlled exports to decoupling zero control, the output of proportioning self-optimizing control is accepted in decoupling zero control simultaneously, the control of coke-stove gas flow-control and combustion air flow is given in the output of decoupling zero control respectively, coke-stove gas flow control valve and combustion-supporting air flow adjustable valve are controlled in the output of coke-stove gas flow-control and combustion air flow control respectively, the pressure controlled output control of coke-stove gas 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 online detection, and controls according to predicted value, has overcome hot-blast furnace temperature and has detected the influence that lags behind to the control system response speed; The pressure and temperature control of hot-blast stove of the present invention is regulated the two tandem control models of formation decoupling zero with coke-stove gas Flow-rate adjustment and combustion air flow, has overcome influencing each other of hot-blast furnace temperature and pressure, and has accelerated response speed; Programmable Logic Controller is sought current best proportioning automatically according to latest history data, improves fast-response energy and the adaptive capacity of system, adds the dynamic accuracy in the adjustment process is controlled, and has improved the whole control accuracy of system; Therefore can control the temperature and pressure of hot-blast stove rapidly and accurately, make it to adapt to the requirement of flue gas of sintering machine relieving haperacidity.As seen, the present invention compared with prior art has technological progress significantly.
Description of drawings 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 the computer controlled simulation schematic diagram of the present invention.1 is the coke-stove gas input channel among the figure, 2 is the combustion air input channel, and 3 is the coke-stove gas pressure-regulating valve, and 4 is Programmable Logic Controller, 5 is the combustion-supporting air flow quantity sensor, 6 is the coke-stove gas pressure sensor, and 7 is the coke-stove gas flow sensor, and 8 is the coke-stove gas flow control valve, 9 is the combustion-supporting air flow adjustable valve, 10 is the hot-blast furnace temperature sensor, and 11 is the hot-blast stove pressure sensor, and 12 are flue gas desulfurization relieving haperacidity hot-blast stove.
The specific embodiment
Embodiment: shown in Fig. 1, flue gas desulfurization relieving haperacidity hot-blast furnace temperature control device, comprise that coke-stove gas input channel 1, combustion air input channel 2 and the flue gas desulfurization relieving haperacidity hot-blast stove 12 that is connected with two gas inlet pipe roads, this programme are at coke-stove gas input channel l coke-stove gas pressure-regulating valve 3, coke-stove gas pressure sensor 6, coke-stove gas flow sensor 7 and coke-stove gas flow control valve 8 to be housed; At combustion air input channel 2 combustion-supporting air flow quantity sensor 5 and combustion-supporting air flow adjustable valve 9 are housed; At flue gas desulfurization relieving haperacidity hot-blast stove 12 hot-blast furnace temperature sensor 10 and hot-blast stove pressure sensor 11 are housed; In addition, coke-stove gas pressure-regulating valve 3, coke-stove gas pressure sensor 6, coke-stove gas flow sensor 7 and coke-stove gas flow control valve 8 on a Programmable Logic Controller 4 and the coke-stove gas input channel l are arranged, with combustion-supporting air flow quantity sensor 5 and the combustion-supporting air flow adjustable valve 9 on the combustion air input channel 2, with hot-blast furnace temperature sensor 10 on the flue gas desulfurization relieving haperacidity hot-blast stove 12 and hot-blast stove pressure sensor 11 the signal handing-over is arranged.
Described Programmable Logic Controller 4 comprises analog quantity input function blocks, coke-stove gas pressure control function piece, hot-blast stove pressure control function piece, hot-blast stove actual temperature forecast function piece, hot-blast furnace temperature control functional block, decoupling zero control functional block, coke-stove gas flow control function piece and combustion air flow control functional block, and the output of analog quantity input function blocks connects the input of coke-stove gas pressure control function piece, the input of hot-blast stove pressure control function piece and the input of hot-blast stove actual temperature forecast function piece respectively; The output of coke-stove gas pressure control function piece connects the coke-stove gas pressure-regulating valve; The output of hot-blast stove pressure control function piece connects an input of decoupling zero control functional block; The output of hot-blast stove actual temperature forecast function piece connects the input of hot-blast furnace temperature control functional block, and the output of hot-blast furnace temperature control functional block connects another input of decoupling zero control functional block; The output of decoupling zero control functional block connects the input of coke-stove gas flow control function piece and the input of combustion air flow control functional block respectively; The output of coke-stove gas flow control function piece connects the coke-stove gas flow control valve; The output of combustion air flow control functional block connects the combustion-supporting air flow adjustable valve.
By Fig. 2 as can be seen, the temperature control system model that computerizeds control in this programme, it is the valve position value by the coke-stove gas pressure-regulating valve 3 that transmits on the coke-stove gas input channel l, the coke-stove gas force value of coke-stove gas pressure sensor 6, the coke-stove gas flow value of coke-stove gas flow sensor 7 and the valve position value of coke-stove gas flow control valve 8, valve position value by combustion-supporting air flow value and the combustion-supporting air flow adjustable valve 9 of the combustion-supporting air flow quantity sensor 5 that transmits on the combustion air input channel 2, by the temperature of the hot-blast furnace temperature sensor 10 that transmits on the flue gas desulfurization relieving haperacidity hot-blast stove 12 and the force value of hot-blast stove pressure sensor 11, input to Programmable Logic Controller analog quantity input function blocks simultaneously, analog quantity input function blocks is exported to the control of coke-stove gas pressure respectively, the control of hot-blast stove pressure and hot-blast stove actual temperature are predicted each functional block, the hot-blast furnace temperature of exporting to of hot-blast stove actual temperature forecast function piece is controlled functional block, functional block is controlled in the output of hot-blast furnace temperature control functional block and the decoupling zero of exporting to of hot-blast stove pressure control function piece, decoupling zero control functional block is accepted the output of proportioning self-optimizing control functional block simultaneously, coke-stove gas flow control function piece and combustion air flow control functional block is given in the output of decoupling zero control functional block respectively, coke-stove gas flow control valve and combustion-supporting air flow adjustable valve are controlled in the output of coke-stove gas flow control function piece and combustion air flow control functional block respectively, the output control coke-stove gas pressure-regulating valve of coke-stove gas pressure control function piece.
The matching used software of present embodiment has STEP7 V5.4; Inner direct addressing method is adopted in communication between each functional module.
Claims (2)
1. flue gas desulfurization relieving haperacidity hot-blast furnace temperature control device, comprise Programmable Logic Controller, coke-stove gas input channel, combustion air input channel and the flue gas desulfurization relieving haperacidity hot-blast stove that is connected with two kinds of gas inlet pipe roads, it is characterized in that: at the coke-stove gas input channel coke-stove gas pressure-regulating valve, coke-stove gas pressure sensor, coke-stove gas flow sensor and coke-stove gas flow control valve are housed; At the combustion air input channel combustion-supporting air flow quantity sensor and combustion-supporting air flow adjustable valve are housed; At flue gas desulfurization relieving haperacidity hot-blast stove temperature sensor and pressure sensor are housed; The input of Programmable Logic Controller connects the output of coke-stove gas pressure-regulating valve, coke-stove gas pressure sensor, coke-stove gas flow sensor, coke-stove 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; The output of Programmable Logic Controller connects coke-stove gas pressure-regulating valve, hot-blast stove pressure and hot-blast furnace temperature sensor;
Described Programmable Logic Controller comprises analog quantity input function blocks, coke-stove gas pressure control function piece, hot-blast stove pressure control function piece, hot-blast stove actual temperature forecast function piece, hot-blast furnace temperature control functional block, decoupling zero control functional block, coke-stove gas flow control function piece and combustion air flow control functional block, and the output of analog quantity input function blocks connects the input of coke-stove gas pressure control function piece, the input of hot-blast stove pressure control function piece and the input of hot-blast stove actual temperature forecast function piece respectively; The output of coke-stove gas pressure control function piece connects the coke-stove gas pressure-regulating valve; The output of hot-blast stove pressure control function piece connects an input of decoupling zero control functional block; The output of hot-blast stove actual temperature forecast function piece connects the input of hot-blast furnace temperature control functional block, and the output of hot-blast furnace temperature control functional block connects another input of decoupling zero control functional block; The output of decoupling zero control functional block connects the input of coke-stove gas flow control function piece and the input of combustion air flow control functional block respectively; The output of coke-stove gas flow control function piece connects the coke-stove gas flow control valve; The output of combustion air flow control functional block connects the combustion-supporting air flow adjustable valve.
2. according to the described a kind of flue gas desulfurization relieving haperacidity hot-blast furnace temperature control device of claim 1, it is characterized in that: its control method is the valve position value that is uploaded to the coke-stove gas pressure-regulating valve of Programmable Logic Controller analog quantity input processing by the coke-stove gas input channel, the coke-stove gas force value of coke-stove gas pressure sensor, the coke-stove gas flow value of coke-stove gas flow sensor and the valve position value of coke-stove gas flow control valve, be uploaded to the combustion-supporting air flow value of the combustion-supporting air flow quantity sensor that Programmable Logic Controller analog quantity input handles and the valve position value of combustion-supporting air flow adjustable valve by the combustion air input channel, be uploaded to the force value of the temperature and pressure sensor of the temperature sensor that Programmable Logic Controller analog quantity input handles by flue gas desulfurization relieving haperacidity hot-blast stove, inputing to the input of Programmable Logic Controller analog quantity simultaneously handles, the input of Programmable Logic Controller analog quantity is handled and is exported to the control of coke-stove gas pressure respectively, the control of hot-blast stove pressure and the prediction of hot-blast stove actual temperature, the hot-blast furnace temperature of exporting to of hot-blast stove actual temperature prediction is controlled, the output of hot-blast furnace temperature control and hot-blast stove be pressure controlled exports to decoupling zero control, the output of proportioning self-optimizing control is accepted in decoupling zero control simultaneously, the control of coke-stove gas flow-control and combustion air flow is given in the output of decoupling zero control respectively, coke-stove gas flow control valve and combustion-supporting air flow adjustable valve are controlled in the output of coke-stove gas flow-control and combustion air flow control respectively, the pressure controlled output control of coke-stove gas 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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Cited By (4)
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| CN111707698A (en) * | 2020-07-16 | 2020-09-25 | 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 |
| CN112403179A (en) * | 2019-11-05 | 2021-02-26 | 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 |
| CN112403180A (en) * | 2019-11-05 | 2021-02-26 | 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 |
| 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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| 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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