CN215233228U - Automatic flue gas desulfurization device of hot blast stove - Google Patents
Automatic flue gas desulfurization device of hot blast stove Download PDFInfo
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- CN215233228U CN215233228U CN202120776037.9U CN202120776037U CN215233228U CN 215233228 U CN215233228 U CN 215233228U CN 202120776037 U CN202120776037 U CN 202120776037U CN 215233228 U CN215233228 U CN 215233228U
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Abstract
An automatic desulfurizing device for the fume of hot-blast stove is composed of desulfurizing unit, desulfurizing agent metering and supplying unit, and two SO units2The device comprises a detector, a flue gas flow velocity detector, a desulfurizer flow velocity detector and a PLC, wherein a flue gas inlet of a desulfurizer is connected with a flue gas pipeline, an outlet of the desulfurizer is connected with a chimney, and a desulfurizer inlet is connected with a desulfurizer metering and supplying device through a desulfurizer pipeline; first SO2The detector and the flue gas flow velocity detector are arranged on the flue gas pipeline, and the second SO2The detector is arranged on the flue in front of the chimney,the desulfurizer flow velocity detector is arranged on the desulfurizer pipeline, the output end of each detector and the metering signal output end of the desulfurizer metering and supplying device are respectively connected with different input ports of the PLC, and the desulfurizer metering and supplying device is connected with the output port of the PLC. The utility model discloses can be according to desulfurizer entry flue gas SO2The fluctuation of the content automatically adjusts the input amount of the desulfurizer, prevents the waste of the desulfurizer, and simultaneously avoids the over-standard emission of sulfur dioxide caused by the insufficient desulfurizer.
Description
Technical Field
The utility model relates to an automatic desulphurization unit of blast furnace system hot blast stove flue gas belongs to metallurgical equipment technical field.
Background
Sulfur dioxide is one of the main pollutants in the atmosphere, and in the blast furnace smelting process, the hot blast stove stores heat by burning coal gas to provide heat energy for blast furnace production. The flue gas generated in the coal gas combustion process contains a large amount of sulfur dioxide, and the direct emission can cause serious pollution to air.
With the increasingly strict national standards for the emission limit of pollutants in the steel industry, ultralow emission becomes a development trend, so that flue gas desulfurization facilities of hot blast stoves are gradually widely applied in the steel industry. However, the existing hot blast stove flue gas desulfurization method is based on SO in the flue gas at the outlet of the desulfurizer2The content of the desulfurizer is adjusted by adopting a manual mode, and the change of the production raw fuel and the change of the combustion degree of coal gas in the hot blast stove can cause the flue gas to be in the flue gasThe content of sulfur dioxide is changed, and the input amount of the desulfurizer can not be adjusted in time by a manual adjusting mode according to the fluctuation condition of the content of sulfur dioxide in the flue gas, which inevitably causes waste of the desulfurizer or causes the excessive sulfur dioxide emission due to insufficient input amount of the desulfurizer. Therefore, it is necessary to design a desulfurization device capable of automatically adjusting the input amount of the desulfurizing agent according to the change of the sulfur dioxide content in the flue gas.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an automatic desulphurization unit of hot-blast furnace flue gas to prior art's drawback to prevent to cause the waste of desulfurizer, and avoid arousing the sulfur dioxide emission because of the desulfurizer input is not enough and exceed standard.
The problem of the utility model is solved with following technical scheme:
an automatic desulfurizing device for the fume of hot-blast stove is composed of desulfurizing unit, desulfurizing agent metering and supplying unit, and two SO units2The device comprises a detector, a flue gas flow velocity detector, a desulfurizer flow velocity detector and a PLC, wherein a flue gas inlet of a desulfurizer is connected with a flue gas pipeline, a flue gas outlet is connected with a chimney through a dust remover and a flue gas induced draft fan in sequence, and a desulfurizer inlet is connected with a desulfurizer metering supply device through a desulfurizer pipeline; first SO2The detector and the flue gas flow velocity detector are arranged on the flue gas pipeline, and the second SO2The detector is arranged on the flue in front of the chimney, the desulfurizer flow velocity detector is arranged on the desulfurizer pipeline, and the two SO detectors are arranged in front of the desulfurizer pipeline2The signal output ends of the detector, the flue gas flow velocity detector and the desulfurizer flow velocity detector and the metering signal output end of the desulfurizer metering and supplying device are respectively connected with different input ports of the PLC, and the control end of the desulfurizer metering and supplying device is connected with the output port of the PLC.
Above-mentioned automatic desulphurization unit of hot-blast furnace flue gas, desulfurizer measurement feeding device includes desulfurizer feed bin, measurement batcher, feed converter, grinds the machine, grinds converter, fluidized fan and fluidization converter, the feed inlet and the bin outlet of desulfurizer feed bin lower part of measurement batcher are connected, and the discharge gate is connected with the feed inlet of grinding the machine, fluidized fan's feed inlet and the discharge gate of grinding the machine are connected, and the discharge gate passes through the desulfurizer entry linkage of desulfurizer pipeline with the desulfurizer, the input of feed converter, grinding converter and fluidization converter is connected with PLC's output port, and the output is connected with the driving motor of measurement batcher, grinding machine and fluidization fan respectively.
The automatic desulfurization device for the flue gas of the hot blast stove further comprises a display, and the display is connected with a communication interface of the PLC.
In the automatic desulfurization device for the flue gas of the hot blast stove, the length of the pipeline from the metering feeder to the desulfurizer and the first SO2The ratio of the length of the pipeline from the detector to the desulfurizer is less than or equal to the ratio of the maximum desulfurizer flow speed measured by the desulfurizer flow speed detector to the maximum flue gas flow speed at the inlet of the desulfurizer measured by the flue gas flow speed detector.
The utility model discloses can be according to SO in the desulfurizer entry flue gas2The input amount of the desulfurizer is automatically adjusted under the condition of content fluctuation, SO that the input amount of the desulfurizer is always equal to the SO in the flue gas2The content is matched, the waste of the desulfurizer is prevented, and the excessive sulfur dioxide discharge caused by insufficient desulfurizer input can be avoided, so that the aim of optimizing the desulfurization effect is fulfilled.
Drawings
The present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 is a schematic view of the installation of the present invention;
fig. 2 is an electrical schematic diagram of the present invention.
The reference numbers in the figures are: 1. flue gas pipeline, 2, desulfurizer, 3, dust remover, 4, flue gas induced draft fan, 5, chimney, 6, desulfurizer bin, 7, desulfurizer pipeline, X1, first SO2Detector, X2, second SO2The device comprises a detector, S1, a flue gas flow velocity detector, S2, a desulfurizer flow velocity detector, B1, a fluidization frequency converter, B2, a grinding frequency converter, B3, a feeding frequency converter, F, a fluidization fan, M, a grinder, G, a metering feeder, XS and a display.
Detailed Description
The utility model provides an automatic desulphurization unit of hot-blast furnace flue gas for solve the hot-blast furnace flue gas desulfurization in-process, the unreasonable waste or the sulfur dioxide emission that causes of desulfurizer input problem that exceeds standard.
The utility model discloses can be according to SO in the desulfurizer entry flue gas2The content change can automatically adjust the input amount of the desulfurizer compared with the method according to SO in the flue gas at the outlet of the desulfurizer2The method for adjusting the content has the advantages of advanced prediction and adjustment and eliminates the influence of human factors, thereby achieving the purpose of optimizing the desulfurization effect.
Referring to fig. 1 and 2, the utility model discloses a desulfurizer 2, desulfurizer feed bin 6, fluidized fan F, grind machine M, measurement batcher G, detection instrument and regulation converter. The flue gas entry and the flue gas pipeline 1 of desulfurizer 2 are connected, the flue gas export is connected with chimney 5 through dust remover 3 and flue gas draught fan 4 in proper order, the feed inlet of metering feeder G is connected with the bin outlet of 6 lower parts in desulfurizer feed bin, the discharge gate is connected with the feed inlet of grinding machine M, the feed inlet of fluidized air blower F is connected with the discharge gate of grinding machine M, the discharge gate passes through desulfurizer pipeline 7 and desulfurizer entry linkage of desulfurizer 2, instrumentation includes first SO2Detector X1, flue gas flow velocity detector S1 and second SO2A detector X2, a metering feeder G and a desulfurizer flow rate detector S2. First SO2The detector X1 and the flue gas flow velocity detector S1 are arranged on the flue gas pipeline 1 of the flue gas inlet of the desulfurizer 2 and are used for measuring the inlet flue gas SO2Content and inlet flue gas flow rate, second SO2The detector X2 is arranged on the flue in front of the chimney 5 and is used for measuring the SO of the flue gas discharged by the desulfurizer 22The measuring feeder G is arranged between the desulfurizer bin 6 and the grinder M and used for feeding the desulfurizer and measuring the amount of the desulfurizer, and the desulfurizer flow rate detector S2 is arranged on the desulfurizer pipeline 7 and used for measuring the flow rate of the desulfurizer.
Referring to fig. 2, the adjusting frequency converter comprises a fluidization frequency converter B1, a grinding frequency converter B2 and a feeding frequency converter B3, wherein the fluidization frequency converter B1 is connected with a motor of a fluidization fan F and used for controlling the flow rate of the desulfurizer, the grinding frequency converter B2 is connected with a motor of a grinder M and used for controlling the grinding speed of the desulfurizer, and the feeding frequency converter B3 is connected with a motor of a metering feeder G and used for controlling the feeding speed of the desulfurizer.
Referring to fig. 1 and 2, the utility model further comprises a PLC and a display XS, wherein the P1.1 end of the PLC is connected with the first SO2The X1 end of the detector is connected with the flue gas flow velocity detector S1 at the P1.2 end, and the P1.3 end is connected with the second SO2The X2 end, the P1.4 end is connected with the desulfurizer flow rate detector S2, the P1.5 end is connected with the metering signal output end of the metering feeder G, the P2.1 end is connected with the display XS, the P2.2 end is connected with the fluidization frequency converter B1, the P2.3 end is connected with the grinding frequency converter B2, and the P2.4 end is connected with the feeding frequency converter B3. The display XS may perform data monitoring and parameter setting input.
The utility model discloses a theory of operation does:
the device can select a calibration mode and an automatic mode from the display XS, and the device needs to be firstly put into the calibration mode when being put into use or desulfurizing agent types are replaced for the first time.
Under a calibration mode, firstly inputting data of the radius of a flue gas pipeline 1 and the radius of a desulfurizer pipeline 7 on a display XS, then manually adjusting a fluidization frequency converter B1, a grinding frequency converter B2 and a feeding frequency converter B3, respectively controlling the flow rate of the desulfurizer, the grinding speed of the desulfurizer and the feeding speed of the desulfurizer, starting calibration after the expected stable effect of flue gas desulfurization is achieved, at the moment, all operations on the display XS fail, entering an automatic data acquisition stage by a PLC (programmable logic controller), finishing calibration after 1 minute lasts, and according to acquired inlet flue gas SO2The data of the content, the inlet flue gas flow rate and the radius of the flue gas pipeline 1 are calculated in the PLC, and the total amount Q1 and SO of the flue gas entering the desulfurizer are accumulated within 1 minute2The weight W1, the total amount Q2 of the desulfurizer mixture which is accumulated and enters the desulfurizer within 1 minute is calculated according to the flow velocity of the desulfurizer and the radius of a desulfurizer pipeline 7, the accumulated input weight W2 of the desulfurizer within 1 minute is calculated according to the metering data of a metering feeder G, and the SO of the discharged flue gas is calculated according to the input weight W2 of the desulfurizer2The content and the total amount of the discharged flue gas (the sum of Q1 and Q2) are calculated, and the cumulative SO discharged within 1 minute is calculated2Weight W3, finally according to the formula: W2/(W1-W3) calculating the unit SO2The weight W of the desulfurizer required by desulfurization reaction is saved, the data W is stored independently, the later-stage direct calling is convenient, and the repeated calibration can be avoided.
In automatic mode, according to inlet flue gas SO2Real-time data of content and inlet flue gas flow rate, and combination of radius of flue gas pipeline 1 and unit SO2The weight W of the desulfurizer required by desulfurization reaction is calculated in the PLC, the input amount of the desulfurizer required by the complete desulfurization of the current flue gas is calculated in real time, the speeds of the grinding frequency converter B2 and the feeding frequency converter B3 are automatically adjusted, the input amount of the desulfurizer is increased or reduced, and the speed of the fluidization frequency converter B1 is adjusted in real time, SO that the length of a pipeline from the metering feeder G to the desulfurizer 2 and the first SO 2 are ensured2The ratio of the length of the pipeline from the X1 installation position of the detector to the desulfurizer is equal to the ratio of the flow velocity of the desulfurizer to the flow velocity of the inlet flue gas, SO that the flue gas and the matched desulfurizer simultaneously enter the desulfurizer, and the SO in the discharged flue gas is realized2The content is stable and controllable.
The utility model discloses a measure SO in the flue gas2The content and the flow velocity are combined with the input amount of the desulfurizer to calculate the relationship between the desulfurization effect and the dosage of the desulfurizer, and when SO in the inlet flue gas2When the content is changed, the input amount of the desulfurizer is adjusted in real time according to the calculated dose relation, so that the aim of automatic adjustment is fulfilled. Has the advantages of full desulfurization, desulfurizing agent waste prevention and flue gas SO emission2Stable and controllable content, etc.
Claims (4)
1. An automatic flue gas desulfurization device of a hot blast stove is characterized by comprising a desulfurizer (2), a desulfurizer metering and supplying device and two SOs2The device comprises a detector, a flue gas flow velocity detector (S1), a desulfurizer flow velocity detector (S2) and a PLC, wherein a flue gas inlet of a desulfurizer (2) is connected with a flue gas pipeline (1), a flue gas outlet is connected with a chimney (5) through a dust remover (3) and a flue gas induced draft fan (4) in sequence, and a desulfurizer inlet is connected with a desulfurizer metering and supplying device through a desulfurizer pipeline (7); first SO2The detector (X1) and the flue gas flow velocity detector (S1) are arranged on the flue gas pipeline (1), and the second SO2The detector (X2) is arranged on the flue in front of the chimney (5), the desulfurizer flow velocity detector (S2) is arranged on the desulfurizer pipeline (7), and two SO devices are arranged on the desulfurizer pipeline2The signal output ends of the detector, the flue gas flow velocity detector (S1) and the desulfurizer flow velocity detector (S2) and the metering signal output end of the desulfurizer metering and supplying device are respectively connected with different input ports of the PLC, and the desulfurization device is connected with the signal output ends of the detectors and the desulfurizer flow velocity detector (S1) and the metering signal output end of the desulfurizer metering and supplying deviceThe control end of the agent metering supply device is connected with the output port of the PLC.
2. The automatic desulfurization device of hot blast stove flue gas of claim 1, characterized in that the desulfurizer metering and feeding device comprises a desulfurizer bin (6), a metering feeder (G), a feeding frequency converter (B3), a grinding machine (M), a grinding frequency converter (B2), a fluidized fan (F) and a fluidized frequency converter (B1), wherein a feeding port of the metering feeder (G) is connected with a discharging port at the lower part of the desulfurizer bin (6), a discharging port of the metering feeder is connected with a feeding port of the grinding machine (M), a feeding port of the fluidized fan (F) is connected with a discharging port of the grinding machine (M), the discharging port is connected with a desulfurizer inlet of the desulfurizer (2) through a desulfurizer pipeline (7), input ends of the feeding frequency converter (B3), the grinding frequency converter (B2) and the fluidized frequency converter (B1) are connected with an output port of the PLC, and output ends of the feeding frequency converter (G) and the metering feeder (G) respectively, The grinder (M) is connected with a drive motor of the fluidization fan (F).
3. The automatic flue gas desulfurization device of the hot blast stove according to claim 1 or 2, characterized by further comprising a display (XS), wherein the display (XS) is connected with a communication interface of the PLC.
4. The automatic flue gas desulfurization device of the hot blast stove according to claim 3, characterized in that the length of the pipeline from the metering feeder (G) to the desulfurizer (2) is equal to the first SO2The ratio of the length of the pipeline from the detector (X1) to the desulfurizer (2) is less than or equal to the ratio of the maximum desulfurizer flow rate measured by the desulfurizer flow rate detector (S2) to the maximum flue gas flow rate at the inlet of the desulfurizer (2) measured by the flue gas flow rate detector (S1).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120776037.9U CN215233228U (en) | 2021-04-16 | 2021-04-16 | Automatic flue gas desulfurization device of hot blast stove |
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| CN202120776037.9U CN215233228U (en) | 2021-04-16 | 2021-04-16 | Automatic flue gas desulfurization device of hot blast stove |
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| CN215233228U true CN215233228U (en) | 2021-12-21 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115105935A (en) * | 2022-07-13 | 2022-09-27 | 中冶京诚工程技术有限公司 | Flue gas desulfurization and denitrification system and method for blast furnace hot blast stove |
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2021
- 2021-04-16 CN CN202120776037.9U patent/CN215233228U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115105935A (en) * | 2022-07-13 | 2022-09-27 | 中冶京诚工程技术有限公司 | Flue gas desulfurization and denitrification system and method for blast furnace hot blast stove |
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