CN204017646U - A kind of flue gas of sintering machine denitration special equipment - Google Patents
A kind of flue gas of sintering machine denitration special equipment Download PDFInfo
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- CN204017646U CN204017646U CN201420507182.7U CN201420507182U CN204017646U CN 204017646 U CN204017646 U CN 204017646U CN 201420507182 U CN201420507182 U CN 201420507182U CN 204017646 U CN204017646 U CN 204017646U
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- desulfurizing tower
- displacement reaction
- reaction pond
- sintering machine
- ammonia
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Abstract
A kind of flue gas of sintering machine denitration special equipment, comprise sintering machine, bellows, sack cleaner, booster fan, desulfurizing tower, dehumidifying purifying column, SCR reactor, blower fan, chimney, it is characterized in that: the described sintering machine bellows that are linked in sequence, sack cleaner, booster fan, desulfurizing tower, dehumidifying purifying column, SCR reactor, blower fan, chimney, between described bellows and sack cleaner, be connected with electric control valve, described fan outlet is connected with desulfurizing tower air intake, desulfurizing tower air intake lower sides is provided with PH and detects controller, PH detects controller and is connected with desulfur pump by control cables, desulfurizing tower air intake bottom connects aeration displacement reaction pond by pipeline, aeration displacement reaction pond connects sedimentation basin, aeration displacement reaction pond one side is provided with roots blower, opposite side is provided with calcium hydroxide feed bin.The advantages such as the utlity model has desulfuration efficiency high, investment operating cost is low, safeguards that easily floor space is little, and service life of equipment is long.
Description
Technical field
The utility model relates to a kind of desulphurization denitration equipment of flue gas, especially relates to a kind of flue gas of sintering machine denitration special equipment.
Background technology
At present, the coke powder that SINTERING PRODUCTION is used and coal dust are in 1200 ℃ of high-temperature firing processes of sintering machine, and in raw material, sulphur, nitrogen generate SO through chemical reaction
2, NOx enters sinter fume, the SO of sintering machine discharge
2, NOx accounts for domestic SO
2, NOx total emission volumn a big chunk, be the emission source that is only second to thermal power plant, the analysis according to sinter fume, has following features:
(1) in sinter fume, SO2 change in concentration is very fast and fluctuation of concentration amplitude is large;
(2) flue-gas temperature of sintering discharge fluctuation between 100 ℃～150 ℃ conventionally;
(3) dust concentration in sinter fume is substantially at 100g/Nm
3to 150g/Nm
3between change;
(4) oxygen content of sintering discharge flue gas changes between 14%～18%, and SO in flue gas
2there is certain corresponding relation in the variation of concentration and the variation of oxygen content: SO when oxygen content is on the low side in flue gas
2concentration is higher; SO when oxygen content is higher in flue gas
2concentration is on the low side;
(5) in coal, approximately contain 0.5～2% nitrogen (by mass), in combustion process, oxidation forms NOx; Concentration is substantially at 300g/Nm
3to 1000g/Nm
3between change;
(6) water capacity of sintering discharge flue gas is larger, fluctuation between 8%～10.5% conventionally.
In sum, the flue-gas temperature of sintering machine is relatively low, mostly between 100～150 ℃, residing flue gas environmental condition is more severe, oxygen content as higher in dust concentration, flue gas is higher, water capacity is large, heavy metal concentration is more high, in the situation that adopting sulphur coal, sintering device handpiece flue gas SO
2concentration of emission reach 6000～8000mg/Nm
3, NOx concentration reaches 800～1000g/Nm
3, environment is caused to severe contamination, but is not also applicable to the desulphurization denitration equipment of sintering device flue gas at present.
Summary of the invention
The advantages such as the utility model, for the problems referred to above, provides a kind of flue gas of sintering machine denitration special equipment, has desulphurization and denitration efficiency high, and investment operating cost is low, and reliability is high, and energy consumption is low, safeguards easily, and floor space is little, system long service life.
The technical solution of the utility model is: a kind of flue gas of sintering machine denitration special equipment, comprise sintering machine, bellows, sack cleaner, booster fan, desulfurizing tower, dehumidifying purifying column, SCR reactor, blower fan, chimney, it is characterized in that: the described sintering machine bellows that are linked in sequence, sack cleaner, booster fan, desulfurizing tower, dehumidifying purifying column, SCR reactor, blower fan, chimney, between described bellows and sack cleaner, be connected with electric control valve, described fan outlet is connected with desulfurizing tower air intake, desulfurizing tower air intake lower sides is provided with PH and detects controller, PH detects controller and is connected with desulfur pump by control cables, desulfurizing tower air intake bottom connects aeration displacement reaction pond by pipeline, aeration displacement reaction pond connects sedimentation basin, aeration displacement reaction pond one side is provided with roots blower, opposite side is provided with calcium hydroxide feed bin, calcium hydroxide feed bin connects discharger, discharger connecting electronic spiral claims, electron helical claims to connect frequency conversion rotary feeder, frequency conversion rotary feeder connects aeration displacement reaction pond, aeration displacement reaction pond pool side is provided with aeration displacement reaction pond PH and detects controller, aeration displacement reaction pond PH detects controller and is connected with frequency conversion rotary feeder by control cables, sedimentation basin connects regulating reservoir, sedimentation basin bottom is provided with the outer discharge pipe of waste liquid, regulating reservoir opposite side is provided with NaOH storage tank, regulating reservoir pool side is provided with regulating reservoir PH and detects controller, regulating reservoir PH detects controller and is connected with electric charging valve by control cables, desulfurizing tower air intake top is provided with nozzle, nozzle top is provided with demister, demister top is provided with exhanst gas outlet, exhanst gas outlet connects dehumidifying purifying column, in dehumidifying purifying column, be provided with damp proof air cleaner, dehumidifying purifying column bottom is provided with the outer discharge pipe of dehumidifying purifying column waste liquid, nozzle is connected with the hose adapter of desulfurizing tower outer wall through desulfurizing tower inwall, hose adapter is connected with shower, shower is fixed on desulfurizing tower outer wall by support, shower is connected with feed tube, feed tube is connected with desulfur pump, desulfur pump connects regulating reservoir, in the middle of described SCR reactor, be provided with catalyst layer, SCR reactor top is connected with ammonia/air mixer, ammonia/air mixer one tunnel is connected with dilution ammonia blower fan, another road is connected with ammonia dashpot, ammonia dashpot is connected with ammonia evaporator.
The beneficial effects of the utility model are: the utlity model has the advantages such as desulphurization and denitration efficiency is high, and investment operating cost is low, and reliability is high, and energy consumption is low, safeguards easily, and floor space is little, system long service life.
Compared with prior art, the utlity model has following advantage, economic effect:
1) adopt spray wet desulphurization mode, non-blind area, constantly carries out desulphurization reaction fully, and desulfurization degree is up to 98%.
2) NaOH consumption rate is less, and after the circulation of system absorption liquid, in fact main consumption is calcium hydroxide, and operating cost is low.
3) be provided with special efficient dehydration demister, dehydration, demist is effective.
4) system operation adopts controlled circulation liquid pH value control method to guarantee system stable operation.
5) liquid-gas ratio is little, and investment, operating cost is low, and system is anticorrosion, anti-wear performance is reliable, long service life.
6) after SCR reactor is arranged in sack cleaner, desulfurizing tower, in flue gas, most of dust and toxicant remove in sack cleaner, desulfurizing tower, so catalyst life can extend greatly, its working life can reach 3～5 years (working life in the flue gas of " unclean " is 2～3 years), catalyst exhaust gases passes that simultaneously can selection of small, greatly improve the specific area of catalyst, thereby reduce the whole consumption of catalyst, reduce initial cost and catalyst change operating cost.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is A-A profile in Fig. 1.
Fig. 3 is B-B profile in Fig. 1.
Fig. 1, Fig. 2, in Fig. 3, 1. sintering machine, 2. bellows, 3. electric flow control valve, 4. sack cleaner, 5. booster fan, 6. desulfurizing tower, 7. demister, 8. exhanst gas outlet, 9. damp proof air cleaner, 10. shower, 11. supports, 12. hose adapters, 13. nozzles, 14. feed tubes, 15. desulfurizing tower air intakes, 16. desulfur pumps, 17. calcium hydroxide feed bins, 18. dischargers, 19. electron helicals claim, 20. frequency conversion rotary feeders, 21. aeration displacement reaction ponds, 22. sedimentation basins, 23. regulating reservoirs, the outer discharge pipe of 24. waste liquids, 25. roots blowers, 26. NaOH storage tanks, 27. dehumidifying purifying columns, the outer discharge pipe of 28. dehumidifying purifying column waste liquid, 29. blower fans, 30. chimneys, 31. electric charging valves, 32.PH detects controller, 33. aeration displacement reaction pond PH detect controller, 34. regulating reservoir PH detect controller, 35. catalyst layers, 36.SCR reactor, 37. dilution ammonia blower fans, 38. ammonias/air mixer, 39. ammonia dashpots, 40. ammonia evaporators.
The specific embodiment
Below in conjunction with accompanying drawing, the utility model is further described.
As Fig. 1, Fig. 2, shown in Fig. 3, the utility model is a kind of flue gas of sintering machine denitration special equipment, comprise sintering machine 1, bellows 2, sack cleaner 4, booster fan 5, desulfurizing tower 6, dehumidifying purifying column 9, SCR reactor 36, blower fan 29, chimney 30, it is characterized in that: described sintering machine 1 bellows 2 that are linked in sequence, sack cleaner 4, booster fan 5, desulfurizing tower 6, dehumidifying purifying column 9, SCR reactor 36, blower fan 29, chimney 30, between described bellows 2 and sack cleaner 4, be connected with electric control valve 3, described blower fan 5 outlets are connected with desulfurizing tower air intake 15, desulfurizing tower air intake 15 lower sides are provided with PH and detect controller 32, PH detects controller 32 and is connected with desulfur pump 16 by control cables, desulfurizing tower air intake 15 bottoms connect aeration displacement reaction pond 21 by pipeline, aeration displacement reaction pond 21 connects sedimentation basin 22, aeration displacement reaction pond 21 1 sides are provided with roots blower 25, opposite side is provided with calcium hydroxide feed bin 17, calcium hydroxide feed bin 17 connects discharger 18, discharger 18 connecting electronic spirals claim 19, electron helical claims 19 connection frequency conversion rotary feeders 20, frequency conversion rotary feeder 20 connects aeration displacement reaction pond 21, aeration displacement reaction pond 21 pool sides are provided with aeration displacement reaction pond PH and detect controller 33, aeration displacement reaction pond PH detects controller 33 and is connected with frequency conversion rotary feeder 20 by control cables, sedimentation basin 22 connects regulating reservoir 23, sedimentation basin 22 bottoms are provided with the outer discharge pipe 24 of waste liquid, regulating reservoir 23 opposite sides are provided with NaOH storage tank 26, regulating reservoir 23 pool sides are provided with regulating reservoir PH and detect controller 34, regulating reservoir PH detects controller 34 and is connected with electric charging valve 31 by control cables, desulfurizing tower air intake 15 tops are provided with nozzle 13, nozzle 13 tops are provided with demister 7, demister 7 tops are provided with exhanst gas outlet 8, exhanst gas outlet 8 connects dehumidifying purifying column 27, in dehumidifying purifying column 27, be provided with damp proof air cleaner 9, dehumidifying purifying column 27 bottoms are provided with the outer discharge pipe 28 of dehumidifying purifying column waste liquid, nozzle 13 is connected with the hose adapter 12 of desulfurizing tower 6 outer walls through desulfurizing tower 6 inwalls, hose adapter 12 is connected with shower 10, adopting hose adapter 12 objects is to be convenient to install, repair demolition is convenient, shower 10 is fixed on desulfurizing tower 6 outer walls by support 11, shower 10 is connected with feed tube 14, feed tube 14 is connected with desulfur pump 16, desulfur pump 16 connects regulating reservoir 23, in the middle of described SCR reactor 36, be provided with catalyst layer 35, SCR reactor 36 tops are connected with ammonia/air mixer 38, ammonia/air mixer 38Yi road is connected with dilution ammonia blower fan 37, another road is connected with ammonia dashpot 39, ammonia dashpot 39 is connected with ammonia evaporator 40.
The course of work of the present utility model: 120m
2sintering machine 1, exhaust gas volumn 200000Nm
3/ h, SO
2concentration 7500mg/Nm
3, NOx concentration 850g/Nm
3, dust concentration 120mg/Nm
3, 100～150 ℃ of flue-gas temperatures, sintering machine 1 flue gas enters in bellows 2 by the suction function of blower fan 5, connecting each bellows 2 to main pipeline, be provided with electric flow control valve 3, be used for mating each bellows 2 air quantity, then enter sack cleaner 4, sintering machine 1 ash-laden gas is played to the effect of dedusting, efficiency of dust collection reaches 99.99%, prevent that dust from entering desulfurizing tower 6 and producing obstruction, sintering machine 1 flue gas of process sack cleaner 4 enters desulfurizing tower 6 by the effect of blower fan 5, flue gas from bottom to top, when being laid in the nozzle 13 at desulfurizing tower 6 middle parts, due to gas-liquid counter current, make the doctor solution of nozzle 13 ejections be fluidized state, gas-liquid is fully contacted, flue gas is after nozzle 13 sprays, by efficient demister, remove water smoke, the concentration of demister outlet flue fog drip is less than 75mg/m
3prevent water droplet corrosion chimney 30, again through dehumidifying purifying column 27 in damp proof air cleaner 9, collect the fine solid particle in gas, purify air, further remove water droplet, through the flue gas except wet purification, flow out dehumidifying purifying column 27, after SCR reactor 36, finally by blower fan 29 and clean flue, enter chimney 30 and be discharged in atmosphere.
Adopt NaOH as desulfurization absorbent, desulfurizing agent is squeezed into desulfurizing tower 6 through desulfur pump 16 and fully contact with flue gas, make the sulfur dioxide in flue gas react generation Na with desulfurizing agent NaOH
2sO
3, the Na discharging from desulfurizing tower 6
2sO
3solution, through aeration oxidation, generates Na
2sO
4, by adding calcium hydroxide separating out the regeneration of absorption liquid and solid by-product, through aeration and sodium, the mixed liquor of calcium displacement flows into sedimentation basin 22, supernatant after precipitation Ash Water Separator, send into regulating reservoir 23, in regulating reservoir 23, when pH value is reduced to a certain degree, by regulating reservoir PH, detect after the pH value in controller 34 mensuration regulating reservoirs 23, controlling electric charging valve 31 constantly supplements the NaOH in NaOH storage tank 26 to add in regulating reservoir 23, in desulfurizing tower 6, when pH value is reduced to a certain degree, by PH, detect after the pH value in controller 32 mensuration desulfurizing towers 6, by controlling desulfur pump 16, in desulfurizing tower 6, add desulfurizing agent, so circulation, heavy ash in sedimentation basin 22 is regularly removed, pick up outward transport.
By the conveying device that calcium hydroxide feed bin 17, discharger 18, electron helical claim 19, frequency conversion rotary feeder 20 forms calcium hydroxide, in aeration displacement reaction pond 21, when pH value is reduced to a certain degree, by aeration displacement reaction pond PH, detect after the pH value in controller 33 mensuration aeration displacement reaction ponds 21, after electron helical claims 19 Weighings, by frequency conversion rotary feeder 20, according to the pH value in aeration displacement reaction pond 21, the conveying capacity of adjusting calcium hydroxide by the mode that changes rotating speed, calcium hydroxide is sent in aeration displacement reaction pond 21.
Desulfurization chemical reaction formula:
In absorption tower, absorb SO
2:
2NaOH+SO
2→Na
2SO
3+H
2O
Na
2SO
3+SO
2+H
2O→2NaHSO
3
To absorb SO
2absorption liquid deliver to aeration displacement reaction pond 21, carry out separating out of the oxidation of inferior sulfate radical, the regeneration of absorption liquid and solid by-product.
By roots blower 25, blast air, in aeration displacement reaction pond 21, oxidation reaction occurs.
Oxidation reaction: Na
2sO
3+ 0.5O
2→ Na
2sO
4
By adding calcium hydroxide separating out the regeneration of absorption liquid and solid by-product.
Displacement reaction: Ca (OH)
2+ Na
2sO
4+ 2H
2o → NaOH+CaSO
42H
2o
Ca(OH)
2+Na
2SO
3→2NaOH+CaSO
3
Ca(OH)
2+2NaHSO
3→Na
2SO
3+CaSO
3·0.5H
2O+0.5H
2O
NaOH and the Na of regeneration
2sO
3deng desulfurizing agent, can recycle.
As can be seen here, NaOH consumption rate is less here, and after the circulation of system absorption liquid, in fact main consumption is calcium hydroxide, so operating cost is lower.
Denitrification process: liquefied ammonia is transported to liquid ammonia storage tank by tank car, the liquefied ammonia of output becomes ammonia after ammonia evaporator 40, is delivered to ammonia dashpot 39 standby; Ammonia in dashpot 39 is sent in ammonia/air mixer 38 after decompression, after air from dilution ammonia blower fan 37 mixes, nozzle by spray ammonia barrier sprays in flue gas and fully mixing with it, then enter SCR reactor 36, when smoke gas flow is during through the catalyst layer 35 of SCR reactor 36, catalytic reaction occurs, and NOx is by selective reduction:
4NH
3+4NO+O
2→4N
2+6H
2O
8NH
3+6NO
2→7N
2+12H
2O
In reactor, NOx is reduced to N
2and water.
The maximum feature of this equipment is that NaOH consumption rate is less by adding calcium hydroxide to the separating out of the regeneration of absorption liquid and solid by-product, and in fact main after the circulation of system absorption liquid what consume is calcium hydroxide, and desulfuration efficiency is up to 98%, and operating cost is lower; In having the flue gas of catalyst, inject ammonia and make reducing agent NOx is reduced, in reactor, NOx is reduced to N
2and water.
With 120m
2flue gas of sintering machine technique is example, and the utility model and conventional equipment comparison, be described as follows:
Note: work per year and calculate for 330th.
As can be seen here, the utlity model has the advantages such as desulfuration efficiency is high, and investment operating cost is low, and reliability is high, and energy consumption is low, safeguards easily, and floor space is little, system long service life.
Claims (1)
1. a flue gas of sintering machine denitration special equipment, comprise sintering machine, bellows, sack cleaner, booster fan, desulfurizing tower, dehumidifying purifying column, SCR reactor, blower fan, chimney, it is characterized in that: the described sintering machine bellows that are linked in sequence, sack cleaner, booster fan, desulfurizing tower, dehumidifying purifying column, SCR reactor, blower fan, chimney, between described bellows and sack cleaner, be connected with electric control valve, described fan outlet is connected with desulfurizing tower air intake, desulfurizing tower air intake lower sides is provided with PH and detects controller, PH detects controller and is connected with desulfur pump by control cables, desulfurizing tower air intake bottom connects aeration displacement reaction pond by pipeline, aeration displacement reaction pond connects sedimentation basin, aeration displacement reaction pond one side is provided with roots blower, opposite side is provided with calcium hydroxide feed bin, calcium hydroxide feed bin connects discharger, discharger connecting electronic spiral claims, electron helical claims to connect frequency conversion rotary feeder, frequency conversion rotary feeder connects aeration displacement reaction pond, aeration displacement reaction pond pool side is provided with aeration displacement reaction pond PH and detects controller, aeration displacement reaction pond PH detects controller and is connected with frequency conversion rotary feeder by control cables, sedimentation basin connects regulating reservoir, sedimentation basin bottom is provided with the outer discharge pipe of waste liquid, regulating reservoir opposite side is provided with NaOH storage tank, regulating reservoir pool side is provided with regulating reservoir PH and detects controller, regulating reservoir PH detects controller and is connected with electric charging valve by control cables, desulfurizing tower air intake top is provided with nozzle, nozzle top is provided with demister, demister top is provided with exhanst gas outlet, exhanst gas outlet connects dehumidifying purifying column, in dehumidifying purifying column, be provided with damp proof air cleaner, dehumidifying purifying column bottom is provided with the outer discharge pipe of dehumidifying purifying column waste liquid, nozzle is connected with the hose adapter of desulfurizing tower outer wall through desulfurizing tower inwall, hose adapter is connected with shower, shower is fixed on desulfurizing tower outer wall by support, shower is connected with feed tube, feed tube is connected with desulfur pump, desulfur pump connects regulating reservoir, in the middle of described SCR reactor, be provided with catalyst layer, SCR reactor top is connected with ammonia/air mixer, ammonia/air mixer one tunnel is connected with dilution ammonia blower fan, another road is connected with ammonia dashpot, ammonia dashpot is connected with ammonia evaporator.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420507182.7U CN204017646U (en) | 2014-08-30 | 2014-08-30 | A kind of flue gas of sintering machine denitration special equipment |
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|---|---|---|---|
| CN201420507182.7U CN204017646U (en) | 2014-08-30 | 2014-08-30 | A kind of flue gas of sintering machine denitration special equipment |
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|---|---|
| CN204017646U true CN204017646U (en) | 2014-12-17 |
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|---|---|---|---|
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105032145A (en) * | 2015-08-18 | 2015-11-11 | 江苏一同环保工程技术有限公司 | Boiler flue gas integration distributing type SOx/NOx control device |
| CN105056746A (en) * | 2015-08-18 | 2015-11-18 | 江苏一同环保工程技术有限公司 | Method for realizing boiler flue gas integrated distributed desulfurization and denitrification process |
| CN105688566A (en) * | 2016-03-02 | 2016-06-22 | 钢研晟华工程技术有限公司 | Desulfurization and denitrification device and method for sintering flue gas |
| CN105688667A (en) * | 2016-01-22 | 2016-06-22 | 钢研晟华工程技术有限公司 | Method for carrying out denitration on sintering flue gas by utilizing sensible heat of blast furnace slag |
| CN105964123A (en) * | 2016-05-30 | 2016-09-28 | 安徽工业大学 | Calculation model for design and operation of ammonia process desulfurization spray tower and optimized regulation method |
| CN106310941A (en) * | 2015-06-16 | 2017-01-11 | 青岛海德威科技有限公司 | Novel ship tail gas post-treatment technology |
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- 2014-08-30 CN CN201420507182.7U patent/CN204017646U/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106310941A (en) * | 2015-06-16 | 2017-01-11 | 青岛海德威科技有限公司 | Novel ship tail gas post-treatment technology |
| CN106310941B (en) * | 2015-06-16 | 2019-07-12 | 海德威科技集团(青岛)有限公司 | A kind of post-processing approach of ship tail gas |
| CN105032145A (en) * | 2015-08-18 | 2015-11-11 | 江苏一同环保工程技术有限公司 | Boiler flue gas integration distributing type SOx/NOx control device |
| CN105056746A (en) * | 2015-08-18 | 2015-11-18 | 江苏一同环保工程技术有限公司 | Method for realizing boiler flue gas integrated distributed desulfurization and denitrification process |
| CN105688667A (en) * | 2016-01-22 | 2016-06-22 | 钢研晟华工程技术有限公司 | Method for carrying out denitration on sintering flue gas by utilizing sensible heat of blast furnace slag |
| CN105688566A (en) * | 2016-03-02 | 2016-06-22 | 钢研晟华工程技术有限公司 | Desulfurization and denitrification device and method for sintering flue gas |
| CN105964123A (en) * | 2016-05-30 | 2016-09-28 | 安徽工业大学 | Calculation model for design and operation of ammonia process desulfurization spray tower and optimized regulation method |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141217 Termination date: 20160830 |