CN205182497U - A control system that is used for shaft furnace flue gas sulfur dioxide to detect and desorption - Google Patents
A control system that is used for shaft furnace flue gas sulfur dioxide to detect and desorption Download PDFInfo
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- CN205182497U CN205182497U CN201520908373.9U CN201520908373U CN205182497U CN 205182497 U CN205182497 U CN 205182497U CN 201520908373 U CN201520908373 U CN 201520908373U CN 205182497 U CN205182497 U CN 205182497U
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- shaft furnace
- desulfurizing tower
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- circulating pump
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Abstract
The utility model relates to a control system that is used for shaft furnace flue gas sulfur dioxide to detect and desorption, including desulfurizing tower, induced draft system, PLC and circulating pump, the desulfurizing tower is connected with induced draft system, from last to being equipped with the defroster in proper order down, spraying layer, pH value detecting instrument in the desulfurizing tower, it is connected with the circulating pump to spray the layer, PLC is connected with pH value detecting instrument, circulating pump. The utility model discloses have advance energy saving and consumption reduction technique, reduce water, the electricity, compressed air isokinetic consumes, reduces the running cost, carries out circular economy.
Description
Technical field
The utility model relates to the control system that a kind of sulfur dioxide detects and removes, and particularly relates to a kind of control system detecting for shaft furnace SO 2 from fume and remove.
Background technology
Affect the pollutant emission of environment containing sulfur dioxide, dust etc. in the flue gas that shaft furnace produces, former technique passes through blower fan by after electric cleaner dedusting, air is entered through flue, now administer discharging pollutants, the difference of dry method and wet desulphurization agent, generally, dry method and semi-dry desulphurization desulfuration efficiency very low, general desulfuration efficiency can only reach about 70%.Wet desulphurization has also been divided into multiple, and general principle is washed through alkaline solution at flue gas exactly, the SO in flue gas
2absorbed by solution, generate sulfite solution and after saturated, carry out oxidation generation sulfate, raw desulfuration byproduct after crystallization.Be exactly that the reduction of sub-salt generates sulphur simple substance in addition, after filtration just to byproduct sulphur.Wet desulphurization efficiency is very high, and the words disregarding desulphurization cost can reach 100%, increasingly strict along with environmental requirement, is badly in need of a kind of system for wet desulphurization.
Utility model content
For the deficiencies in the prior art, the purpose of this utility model is to provide a kind of lime-gypsum method desulfurization, using lime slurry as the desulfurizing technology system of desulfurization absorbent, this system can by desulfurization absorbent and SO
2first reaction generates calcium sulfite, and be then oxidized to calcium sulfate, end product is gypsum.
The technical scheme that the utility model is adopted for achieving the above object is: a kind of control system detecting for shaft furnace SO 2 from fume and remove, comprises desulfurizing tower, induced draught system, PLC and circulating pump; Desulfurizing tower is connected with induced draught system; Demister, spraying layer, pH value detecting instrument is provided with from top to bottom successively in described desulfurizing tower; Described spraying layer is connected with circulating pump; Described PLC is connected with pH value detecting instrument, circulating pump.
Described circulating pump is multiple.
Described spraying layer comprises the shower nozzle that multilayer is arranged; Every layer arranges multiple shower nozzle, and multiple shower nozzle is connected with a circulating-pump outlet by pipeline.
Described desulfurizing tower lower sides is provided with multiple outlet and an outlet; Each outlet is connected with a circulating pump; Outlet is connected with solvent cell.
Described pump entry exports with transfer valve and is connected, and two entrances of transfer valve are connected with the outlet of desulfurizing tower, solvent cell respectively, and transfer valve is connected with PLC.
Described desulfurizing tower sidewall is provided with entrance, and this entrance is connected with induced draught system.
Described induced draught system comprises chimney and blower fan, and the flue gas of shaft furnace is introduced in desulfurizing tower by blower fan, desulfurizing tower side wall entrance; The flue that shaft furnace is connected with blower fan is connected with chimney.
Described blower fan is connected with PLC.
Described pH value detecting instrument is connected with PLC.
Be connected with drain pump by evacuation port bottom described desulfurizing tower, drain pump is connected with plate and frame filter press.
The utility model has following beneficial effect and advantage:
1, the utility model technology maturation, reliable operation, can meet steady in a long-term operation.
2, synchronous operation rate >=98% desulfurization degree >=90% is saved energy and reduce the cost, and business efficiency is high.
3, the utility model adopts circulating pump loop slurry, reduces water, electricity, and the power consumptions such as compressed air reduce operating cost, carry out recycling economy.
4, native system designs three layers of spraying layer, can according to SO
2concentration open separately, SO
2height opens three layers, can open one, two layer time low, and dry method does not just possess this function.
5, the utility model improves the utilization rate of water, and protection of the environment, from Sources controlling discarded object, does minimizing, innoxious and recycling treatment.
Accompanying drawing explanation
Fig. 1 is structure chart of the present utility model;
Wherein, 1 desulfurizing tower, 2 induced draught systems, 3 chimneys, 4 blower fans, 5 demisters, 6 spraying layers, 7pH value detecting instrument, 8 plate and frame filter press, 9 circulating pumps, 10 solvent cells, 11 drain pumps, 12 shaft furnaces, 13 transfer valves.
Detailed description of the invention
Below in conjunction with drawings and Examples, the utility model is described in further detail.
As shown in Figure 1, the flue gas produced in shaft furnace production causes in desulfurizing tower 1 by induced draught system 2 by blower fan 4 by desulfurizing tower 1 of the present utility model, first carry out initial gross separation through demister after flue gas enters and become drop, after being detected by pH value detecting instrument 7, by PLC control transfer valve by add highly basic in solvent cell solvent by circulating pump 9 dozens to spraying layer 6, undertaken detecting qualified flue gas by pH value detecting instrument 7 again and be disposed to air through chimney 3, at the bottom of desulfurizing tower 1 tower, sediment drains into plate and frame filter press 8 by drain pump 11, liquid in solvent cell 10 again by circulating pump 9 dozens to spraying layer 6 iterative cycles.
Wherein, desulfurizing tower discharges after being used for carrying out desulfurization process to the flue gas produced during Metal In Shaft Furnace.
The high efficiency double-layer plate formula demister of flue gas after desulfurization by arranging above spraying layer, below two-layer demister, above spraying layer, spiral board is set, initial gross separation is carried out to band droplet flue gas, ensures that flue gas after desulfurization droplet content is better than discharging standards (low 75mg/Nm3).
Spraying layer, spray process is carried out to the flue gas containing sulphur, the corresponding three layers of spraying layer of circulated sprinkling system configuration 3 circulating pumps, every layer arranges multiple shower nozzle in the horizontal plane, the shower nozzle of multilayer is interlaced on the position of horizontal plane, and projecting in the horizontal plane is uniformly distributed, the utility model adopts hollow spiral case nozzle, material adopts carbofrax material to make, coverage rate > 200%, good nebulization region can be formed, increase mass transfer surfaces to amass, extend the time of staying of drop in tower (time of staying of drop in tower and liquid-drop diameter, nozzle exit velocity is relevant with flow of flue gas direction), thus reach best desulfuration efficiency.PH value detecting instrument, detects slurry pH value in desulfurizing tower; Be arranged at spraying layer bottom in desulfurizing tower, be connected with PLC.When pH value is greater than 6.5, detects pH value and feed back to PLC.The inner slurries spraying layer of desulfurizing tower is by distributing pipe network and nozzle forms, and the spray flux that the design energy reasonable layout of spraying layer requires, makes flue gas flow direction even, and guarantee that doctor solution and flue gas fully contact and react.
The slurries formed at the bottom of desulfurizing tower are expelled to plate and frame filter press by drain pump.
Slurries are delivered to spraying layer by circulating pump; Pump entry place arranges transfer valve, transfer valve adopts two to enter an electric three-way butterfly valve out, two entrances connect outlet, the solvent cell of desulfurizing tower 1 respectively, switch for carrying out the slurries input after neutralizing in the liquid after spraying in desulfurizing tower 1 and solvent cell according to the control signal of PLC.
Solvent cell, is connected with the outlet of the bottom of desulfurizing tower, and the container of neutralization spray rear slurry concentration, when pH value is greater than 6.5, is added highly basic, make it to be less than 6.5, controlled by PLC detected value.
Plate and frame filter press, to there being the filtrate of impurity to extrude, being made filtrate and magazins' layout, being connected by drain pump with bottom desulfurizing tower.The gypsum formed after plate and frame filter press extruding carries out outside transport.
Blower fan, causes desulfurizing tower by the flue gas produced from Metal In Shaft Furnace, is connected with PLC.
Chimney, the pipeline that shaft furnace is connected with blower fan is connected with chimney, for by the fume emission after desulfurizing tower desulfurization to air.At the outlet side of the main channel fan that shaft furnace is connected with blower fan, before desulfurizing tower smoke inlet, be provided with inlet baffle door; The subaisle that main channel is connected with chimney 3 is provided with by-pass damper door.
By-pass damper door, when desulphurization system is normally run, close by-pass damper door, open inlet baffle door, flue gas is discharged by tower top direct exhaust chimney after desulfurizing tower desulfurization; During the maintenance of desulphurization system maintenance shut-downs, open by-pass damper door, close inlet baffle door, flue gas is through former smoke stack emission.Flue duct bypass baffle plate adopts the baffle door of twin shaft twayblade band blanket gas, and has the air-tightness of 100%.By-pass damper has the function of opening fast, complete shut-down to standard-sized sheet opening time≤normal production in 20 seconds time be full-gear.
Operation principle of the present utility model is as follows:
The utility model detect remove to as if based on the desulfurizing agent of calcium hydroxide and NaOH mixed solution.The flue gas that flue is discharged by its major processes introduces desulfurizing tower, is delivered to spraying layer by slurry circulating pump, and the nozzle of adjustment Multi-layer sprinkling, makes flue gas fully contact with desulfurization absorbent, reach and remove SO in flue gas
2object.The droplet in neat stress isolated by the demister of flue gas after desulfurization above spray column, droplet through pH value detector detect after to flue gas during smelting carry out spray neutralization, pH value between 5-6.5 in rear solution, directly enter reservoir; SO
2the gypsum generated at the bottom of desulfurizing tower tower is discharged by gypsum drain pump, makes gypsum filter cake, transported outward by automobile through plate and frame filter press.
Claims (10)
1., for the control system that shaft furnace SO 2 from fume detects and removes, it is characterized in that: comprise desulfurizing tower (1), induced draught system (2), PLC and circulating pump (9); Desulfurizing tower (1) is connected with induced draught system (2); Demister (5), spraying layer (6), pH value detecting instrument (7) is provided with from top to bottom successively in described desulfurizing tower; Described spraying layer (6) is connected with circulating pump (9); Described PLC is connected with pH value detecting instrument (7), circulating pump (9).
2. a kind of control system detecting for shaft furnace SO 2 from fume and remove according to claim 1, is characterized in that described circulating pump (9) is for multiple.
3. a kind of control system detecting for shaft furnace SO 2 from fume and remove according to claim 1, is characterized in that described spraying layer (6) comprises the shower nozzle of multilayer setting; Every layer arranges multiple shower nozzle, and multiple shower nozzle to be exported with a circulating pump (9) by pipeline and is connected.
4. a kind of control system detecting for shaft furnace SO 2 from fume and remove according to claim 1, is characterized in that described desulfurizing tower (1) lower sides is provided with multiple outlet and an outlet; Each outlet is connected with a circulating pump (9); Outlet is connected with solvent cell (10).
5. a kind of control system detecting for shaft furnace SO 2 from fume and remove according to claim 1 and 2, it is characterized in that described circulating pump (9) entrance exports with transfer valve (13) to be connected, two entrances of transfer valve (13) are connected with the outlet of desulfurizing tower (1), solvent cell (10) respectively, and transfer valve (13) is connected with PLC.
6. a kind of control system detecting for shaft furnace SO 2 from fume and remove according to claim 1, it is characterized in that described desulfurizing tower (1) sidewall is provided with entrance, this entrance is connected with induced draught system (2).
7. a kind of control system detecting for shaft furnace SO 2 from fume and remove according to claim 1 or 6, it is characterized in that described induced draught system (2) comprises chimney (3) and blower fan (4), the flue gas of shaft furnace (12) is introduced in desulfurizing tower (1) by blower fan (4), desulfurizing tower (1) side wall entrance; The flue that shaft furnace (12) is connected with blower fan (4) is connected with chimney (3).
8. a kind of control system detecting for shaft furnace SO 2 from fume and remove according to claim 7, is characterized in that described blower fan (4) is connected with PLC.
9. a kind of control system detecting for shaft furnace SO 2 from fume and remove according to claim 1, is characterized in that described pH value detecting instrument (7) is connected with PLC.
10. a kind of control system detecting for shaft furnace SO 2 from fume and remove according to claim 1, it is characterized in that described desulfurizing tower (1) bottom is connected with drain pump (11) by evacuation port, drain pump (11) is connected with plate and frame filter press (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520908373.9U CN205182497U (en) | 2015-11-13 | 2015-11-13 | A control system that is used for shaft furnace flue gas sulfur dioxide to detect and desorption |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520908373.9U CN205182497U (en) | 2015-11-13 | 2015-11-13 | A control system that is used for shaft furnace flue gas sulfur dioxide to detect and desorption |
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| CN205182497U true CN205182497U (en) | 2016-04-27 |
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ID=55775536
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| CN201520908373.9U Active CN205182497U (en) | 2015-11-13 | 2015-11-13 | A control system that is used for shaft furnace flue gas sulfur dioxide to detect and desorption |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI745201B (en) * | 2020-12-25 | 2021-11-01 | 奇鼎科技股份有限公司 | Process waste gas washing device |
| CN113996150A (en) * | 2021-11-03 | 2022-02-01 | 福建三宝钢铁有限公司 | Efficient desulfurization and denitrification method and system |
| CN114632409A (en) * | 2022-02-23 | 2022-06-17 | 国能龙源环保有限公司 | Carbonyl sulfide and hydrogen sulfide removal system suitable for different concentrations and use method thereof |
-
2015
- 2015-11-13 CN CN201520908373.9U patent/CN205182497U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI745201B (en) * | 2020-12-25 | 2021-11-01 | 奇鼎科技股份有限公司 | Process waste gas washing device |
| CN113996150A (en) * | 2021-11-03 | 2022-02-01 | 福建三宝钢铁有限公司 | Efficient desulfurization and denitrification method and system |
| CN113996150B (en) * | 2021-11-03 | 2022-07-15 | 福建三宝钢铁有限公司 | Efficient desulfurization and denitrification method and system |
| CN114632409A (en) * | 2022-02-23 | 2022-06-17 | 国能龙源环保有限公司 | Carbonyl sulfide and hydrogen sulfide removal system suitable for different concentrations and use method thereof |
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