CN204502788U - A kind of fire coal boiler fume denitration in the stove wet desulphurization device - Google Patents
A kind of fire coal boiler fume denitration in the stove wet desulphurization device Download PDFInfo
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- CN204502788U CN204502788U CN201520208086.7U CN201520208086U CN204502788U CN 204502788 U CN204502788 U CN 204502788U CN 201520208086 U CN201520208086 U CN 201520208086U CN 204502788 U CN204502788 U CN 204502788U
- Authority
- CN
- China
- Prior art keywords
- connects
- desulfurizing tower
- frequency conversion
- coal
- flue gas
- Prior art date
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- Expired - Fee Related
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 14
- 239000003245 coal Substances 0.000 title claims abstract description 14
- 239000003517 fume Substances 0.000 title claims abstract description 13
- XSQUKJJJFZCRTK-UHFFFAOYSA-N urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims abstract description 62
- 230000003009 desulfurizing Effects 0.000 claims abstract description 49
- UGFAIRIUMAVXCW-UHFFFAOYSA-N carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 37
- 239000003546 flue gas Substances 0.000 claims abstract description 35
- 238000006243 chemical reaction Methods 0.000 claims abstract description 34
- 239000004202 carbamide Substances 0.000 claims abstract description 31
- 239000008187 granular material Substances 0.000 claims abstract description 30
- 239000000203 mixture Substances 0.000 claims abstract description 10
- HEMHJVSKTPXQMS-UHFFFAOYSA-M sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 33
- 238000006073 displacement reaction Methods 0.000 claims description 32
- 238000005273 aeration Methods 0.000 claims description 31
- 230000001105 regulatory Effects 0.000 claims description 25
- 238000001514 detection method Methods 0.000 claims description 24
- 239000007788 liquid Substances 0.000 claims description 15
- AXCZMVOFGPJBDE-UHFFFAOYSA-L Calcium hydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 14
- 239000000920 calcium hydroxide Substances 0.000 claims description 14
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 14
- 238000004062 sedimentation Methods 0.000 claims description 12
- 239000007789 gas Substances 0.000 claims description 9
- 239000002699 waste material Substances 0.000 claims description 8
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 abstract description 12
- 229910052813 nitrogen oxide Inorganic materials 0.000 abstract description 5
- 239000003344 environmental pollutant Substances 0.000 abstract description 4
- 231100000719 pollutant Toxicity 0.000 abstract description 4
- 230000001473 noxious Effects 0.000 abstract 1
- 229910002089 NOx Inorganic materials 0.000 description 13
- 239000000428 dust Substances 0.000 description 12
- 239000011734 sodium Substances 0.000 description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 238000000034 method Methods 0.000 description 8
- 238000006477 desulfuration reaction Methods 0.000 description 5
- 239000005864 Sulphur Substances 0.000 description 4
- 239000011575 calcium Substances 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- 238000001556 precipitation Methods 0.000 description 4
- 230000008929 regeneration Effects 0.000 description 4
- 238000011069 regeneration method Methods 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 239000007921 spray Substances 0.000 description 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 4
- RAHZWNYVWXNFOC-UHFFFAOYSA-N sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 4
- 239000006227 byproduct Substances 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 239000002803 fossil fuel Substances 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- MYMOFIZGZYHOMD-UHFFFAOYSA-N oxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 3
- 239000003638 reducing agent Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000000903 blocking Effects 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000002817 coal dust Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- KEAYESYHFKHZAL-UHFFFAOYSA-N sodium Chemical compound [Na] KEAYESYHFKHZAL-UHFFFAOYSA-N 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- 230000000576 supplementary Effects 0.000 description 1
Abstract
A kind of fire coal boiler fume denitration in the stove wet desulphurization device, comprise coal-burning boiler, flue gas Online Monitoring Control device, sack cleaner, blower fan, desulfurizing tower, dehumidifying purifying column, chimney, it is characterized in that: described coal-burning boiler is linked in sequence flue gas Online Monitoring Control device, sack cleaner, blower fan, desulfurizing tower, dehumidifying purifying column, chimney, described flue gas Online Monitoring Control device connects frequency conversion rotary feeder, connect electron helical above frequency conversion rotary feeder to claim, electron helical claims to connect discharger, discharger connects urea granules feed bin, mixture generator is connected below frequency conversion rotary feeder, mixture generator one tunnel connects high pressure roots blower fan, urea granules playpipe of separately leading up to connects urea granules jet, urea granules jet is positioned at above the sidewall of coal-burning boiler burner hearth.The utility model can remove SO in fire coal boiler fume
2, the noxious pollutant such as nitrogen oxide, make flue gas qualified discharge, avoid environment.
Description
Technical field
The utility model relates to a kind of fire coal boiler fume denitration in the stove wet desulphurization device, specifically for the flue gas that purification coal-burning boiler produces, belongs to environmental technology field.
Background technology
At present, containing sulphur in the coal dust that coal-burning boiler is used, in 1200 DEG C ~ 1500 DEG C high-temperature firing processes, the sulphur in raw material generates SO through chemical reaction
2enter flue gas, the SO of discharged from coal-fired boiler
2account for domestic SO
2a big chunk of total emission volumn, according to the analysis to fire coal boiler fume, has following features:
(1) in fire coal boiler fume, SO2 change in concentration is quickly and fluctuation of concentration amplitude is large;
(2) flue-gas temperature of discharged from coal-fired boiler fluctuates usually between 120 DEG C ~ 160 DEG C;
(3) dust concentration in fire coal boiler fume is substantially at 15g/Nm
3to 30g/Nm
3between change;
(4) oxygen content of flue gas discharged from coal-fired boiler changes between 5% ~ 8%;
(5) water capacity of flue gas discharged from coal-fired boiler is comparatively large, usually fluctuates between 8% ~ 10.5%.
In sum, the flue-gas temperature of coal-burning boiler is mostly between 120 ~ 160 DEG C, and residing flue gas environmental condition is relatively more severe, and oxygen content that is as higher in dust concentration, flue gas is higher, water capacity is comparatively large, heavy metal concentration is more high, when adopting sulphur coal, fire coal boiler fume SO
2concentration of emission reach 5000 ~ 6000mg/Nm
3, in addition, the concentration of emission of NOx reaches 600 ~ 800g/Nm
3, severe contamination is caused to environment.
Summary of the invention
The purpose of this utility model is to overcome above-mentioned weak point, thus a kind of fire coal boiler fume denitration in the stove wet desulphurization device is provided, this device denitrating technique is mainly reducing agent with urea granules, and with reaction of nitrogen oxides in burner hearth, in burner hearth, NOx is reduced to N
2and water; Adopt spray wet desulfurizing process, non-blind area, desulfuration efficiency is high, and investment operating cost is low, and reliability is high, and energy consumption is low, safeguards easily, the advantages such as floor space is little, system long service life, SO
2concentration of emission 30mg/Nm
3, the concentration of emission 80mg/Nm of NOx
3, dust emission concentration 15mg/Nm
3, be better than GB13223-2011 standard " fossil-fuel power plant atmospheric pollutant emission standard " (SO
2< 50mg/Nm
3, NOx < 100mg/Nm
3, dust emission concentration < 20mg/Nm
3), make flue gas qualified discharge, avoid environment.
The technical solution of the utility model is: a kind of fire coal boiler fume denitration in the stove wet desulphurization device, comprise coal-burning boiler, flue gas Online Monitoring Control device, sack cleaner, blower fan, desulfurizing tower, dehumidifying purifying column, chimney, it is characterized in that: described coal-burning boiler is linked in sequence flue gas Online Monitoring Control device, sack cleaner, blower fan, desulfurizing tower, dehumidifying purifying column, chimney, described flue gas Online Monitoring Control device connects frequency conversion rotary feeder, connect electron helical above frequency conversion rotary feeder to claim, electron helical claims to connect discharger, discharger connects urea granules feed bin, mixture generator is connected below frequency conversion rotary feeder, mixture generator one tunnel connects high pressure roots blower fan, urea granules playpipe of separately leading up to connects urea granules jet, urea granules jet is positioned at above the sidewall of coal-burning boiler burner hearth, connecting bypass pipeline between described fan outlet and electronic air inlet valve import, by-pass line is connected with chimney import, by-pass line is provided with by-passing valve, described electronic air inlet valve outlet is connected with desulfurizing tower air intake, desulfurizing tower air intake lower sides is provided with PH detection control instrument, PH detection control instrument 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, side, aeration displacement reaction pond is provided with roots blower, opposite side is provided with calcium hydroxide feed bin, calcium hydroxide feed bin connects discharger, discharger connects electron helical and 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 detection control instrument, aeration displacement reaction pond PH detection control instrument 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 detection control instrument, regulating reservoir PH detection control instrument 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, damp proof air cleaner is provided with in dehumidifying purifying column, the outer discharge pipe of dehumidifying purifying column waste liquid is provided with bottom dehumidifying purifying column, 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.
The beneficial effects of the utility model are: this device denitrating technique is mainly reducing agent with urea granules, and with reaction of nitrogen oxides in burner hearth, in burner hearth, NOx is reduced to N
2and water; Adopt spray wet desulfurizing process, non-blind area, desulfuration efficiency is high, and investment operating cost is low, and reliability is high, and energy consumption is low, safeguards easily, the advantages such as floor space is little, system long service life, SO
2concentration of emission 30mg/Nm
3, the concentration of emission 80mg/Nm of NOx
3, dust emission concentration 15mg/Nm
3, be better than GB13223-2011 standard " fossil-fuel power plant atmospheric pollutant emission standard " (SO
2< 50mg/Nm
3, NOx < 100mg/Nm
3, dust emission concentration < 20mg/Nm
3), make flue gas qualified discharge, avoid environment.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is A-A cutaway view Amplified image in Fig. 1.
Fig. 3 is B-B cutaway view Amplified image in Fig. 1.
Fig. 4 is C magnified partial view in Fig. 1.
Fig. 1, Fig. 2, Fig. 3, in Fig. 4, 1. coal-burning boiler, 2. sack cleaner, 3. blower fan, 4. electronic air inlet valve, 5. desulfurizing tower air intake, 6. desulfurizing tower, 7. demister, 8. exhanst gas outlet, 9. shower, 10. support, 11. hose adapters, 12. nozzles, 13. feed tubes, 14.PH detection control instrument, 15. desulfur pumps, 16. damp proof air cleaners, 17. dehumidifying purifying columns, the outer discharge pipe of 18. dehumidifying purifying column waste liquid, 19. calcium hydroxide feed bins, 20. dischargers, 21. electron helicals claim, 22. frequency conversion rotary feeders, 23. aeration displacement reaction ponds, 24. aeration displacement reaction pond PH detection control instrument, 25. roots blowers, 26. sedimentation basins, the outer discharge pipe of 27. waste liquids, 28. electric charging valves, 29. NaOH storage tanks, 30. regulating reservoir PH detection control instrument, 31. regulating reservoirs, 32. by-pass lines, 33. by-passing valves, 34. chimneys, 35. urea granules feed bins, 36. dischargers, 37. electron helicals claim, 38. frequency conversion rotary feeders, 39. high pressure roots blower fans, 40. mixture generators, 41. urea granules playpipes, 42. urea granules jets, 43. flue gas Online Monitoring Control devices.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is further described.
As Fig. 1, Fig. 2, Fig. 3, shown in Fig. 4, the utility model is a kind of fire coal boiler fume denitration in the stove wet desulphurization device, comprise coal-burning boiler 1, flue gas Online Monitoring Control device 43, sack cleaner 2, blower fan 3, desulfurizing tower 6, dehumidifying purifying column 17, chimney 34, it is characterized in that: described coal-burning boiler 1 is linked in sequence flue gas Online Monitoring Control device 43, sack cleaner 2, blower fan 3, desulfurizing tower 6, dehumidifying purifying column 17, chimney 34, described flue gas Online Monitoring Control device 43 connects frequency conversion rotary feeder 38, connect electron helical above frequency conversion rotary feeder 38 and claim 37, electron helical claims 37 connection dischargers 36, discharger 36 connects urea granules feed bin 35, mixture generator 40 is connected below frequency conversion rotary feeder 38, mixture generator 40 1 tunnel connects high pressure roots blower fan 39, urea granules playpipe 41 of separately leading up to connects urea granules jet 42, urea granules jet 42 is positioned at above the sidewall of coal-burning boiler 1 burner hearth, described blower fan 3 exports connecting bypass pipeline 32 between electronic air inlet valve 4 import, by-pass line 32 is connected with chimney 34 import, by-pass line 32 is provided with by-passing valve 33, described electronic air inlet valve 4 outlet is connected with desulfurizing tower air intake 5, desulfurizing tower air intake 5 lower sides is provided with PH detection control instrument 14, PH detection control instrument 14 is connected with desulfur pump 15 by control cables, desulfurizing tower air intake 5 bottom connects aeration displacement reaction pond 23 by pipeline, aeration displacement reaction pond 23 connects sedimentation basin 26, side, aeration displacement reaction pond 23 is provided with roots blower 25, opposite side is provided with calcium hydroxide feed bin 19, calcium hydroxide feed bin 19 connects discharger 20, discharger 20 connects electron helical and claims 21, electron helical claims 21 connection frequency conversion rotary feeders 22, frequency conversion rotary feeder 22 connects aeration displacement reaction pond 23, aeration displacement reaction pond 23 pool side is provided with aeration displacement reaction pond PH detection control instrument 24, aeration displacement reaction pond PH detection control instrument 24 is connected with frequency conversion rotary feeder 22 by control cables, sedimentation basin 26 connects regulating reservoir 31, sedimentation basin 26 bottom is provided with the outer discharge pipe 27 of waste liquid, regulating reservoir 31 opposite side is provided with NaOH storage tank 29, regulating reservoir 31 pool side is provided with regulating reservoir PH detection control instrument 30, regulating reservoir PH detection control instrument 30 is connected with electric charging valve 28 by control cables, desulfurizing tower air intake 5 top is provided with nozzle 12, nozzle 12 top is provided with demister 7, demister 7 top is provided with exhanst gas outlet 8, exhanst gas outlet 8 connects dehumidifying purifying column 17, damp proof air cleaner 16 is provided with in dehumidifying purifying column 17, the outer discharge pipe 18 of dehumidifying purifying column waste liquid is provided with bottom dehumidifying purifying column 17, nozzle 12 is connected with the hose adapter 11 of desulfurizing tower 6 outer wall through desulfurizing tower 6 inwall, hose adapter 11 is connected with shower 9, shower 9 is fixed on desulfurizing tower 6 outer wall by support 10, shower 9 is connected with feed tube 13, feed tube 13 is connected with desulfur pump 15, desulfur pump 15 connects regulating reservoir 31.
The course of work of the present utility model: 170t/h coal-burning boiler 1, exhaust gas volumn 380000m
3/ h, smog discharge temperature 120 ~ 160 DEG C, SO
2concentration 5000 ~ 6000mg/Nm
3, the concentration 600 ~ 800mg/Nm of NOx
3, dust concentration 15 ~ 30g/Nm
3, oxygen content is 5% ~ 8%;
Claim 37 by urea granules feed bin 35, discharger 36, electron helical, urea granules injection apparatus that frequency conversion rotary feeder 38, high pressure roots blower fan 39, mixture generator 40, urea granules playpipe 41, urea granules jet 42 etc. form, the exhaust gas volumn of flue gas Online Monitoring Control device 43 pairs of coal-burning boilers 1 and the amount of generation NOx detect, and feed back to PLC control system, PLC control system calculates the consumption of urea, claim after 37 Weighings through electron helical, by frequency conversion rotary feeder 38, according to operating mode, conveying capacity is adjusted by the mode changing rotating speed, conveying capacity sends into blender 40, from the wind-force of high pressure roots blower fan 39, the urea granules falling into blender 40 is sent into urea granules jet 42 by urea granules playpipe 41 to be entered in coal-burning boiler 1 burner hearth, in coal-burning boiler 1 burner hearth, nitrogen oxide generation chemical reaction in urea granules and flue gas:
2CO(NH
2)
2+4NO+O
2＝4N
2+4H
2O+2CO
2
4CO(NH
2)
2+4NO
2＝6N
2+8H
2O+2CO
2
In burner hearth, NOx is reduced to N
2and water;
The flue gas of coal-burning boiler 1 is after denitration process, sack cleaner 2 is entered by the suction function of blower fan 3, coal-burning boiler 1 ash-laden gas is played to the effect of dedusting, efficiency of dust collection is high, prevent dust from entering desulfurizing tower 6 and produce blocking, coal-burning boiler 1 flue gas through sack cleaner 2 enters desulfurizing tower 6, flue gas from bottom to top, when the nozzle 12 by being laid in the middle part of desulfurizing tower 6, due to gas-liquid counter current, the doctor solution that nozzle 12 is sprayed is fluidized state, gas-liquid is fully contacted, flue gas is after nozzle 12 sprays, water smoke is removed by high efficiency demister 7, in demister 7 exiting flue gas, the concentration of droplet is less than 75mg/m
3, prevent water droplet from corroding chimney 34, then in dehumidifying purifying column 17 damp proof air cleaner 16, collect the fine solid particle in gas, purify air, remove water droplet further, be finally discharged in air by chimney 34,
Adopt NaOH as desulfurization absorbent, desulfurizing agent is squeezed into desulfurizing tower 6 through desulfur pump 15 and fully contacts with flue gas, make the sulfur dioxide in flue gas and desulfurizing agent NaOH carry out reaction and generate Na
2sO
3, from the Na that desulfurizing tower 6 is discharged
2sO
3solution, through aerating oxidation, generates Na
2sO
4, by adding the regeneration of calcium hydroxide to absorbing liquid and the precipitation of solid by-product, through aeration and sodium, the mixed liquor of calcium displacement flows into sedimentation basin 26, supernatant after precipitation Ash Water Separator, send into regulating reservoir 31, in regulating reservoir 31, when pH value is reduced to a certain degree, after measuring the pH value in regulating reservoir 31 by regulating reservoir PH detection control instrument 30, controlling electric charging valve 28 adds in regulating reservoir 31 by constantly supplementary for the NaOH in NaOH storage tank 29, in desulfurizing tower 6, when pH value is reduced to a certain degree, after measuring the pH value in desulfurizing tower 6 by PH detection control instrument 14, in desulfurizing tower 6, desulfurizing agent is added by controlling desulfur pump 15, circulation like this, heavy ash in sedimentation basin 26 is regularly removed, pick up outward transport,
By the conveying device that calcium hydroxide feed bin 19, discharger 20, electron helical claim 21, frequency conversion rotary feeder 22 forms calcium hydroxide, in aeration displacement reaction pond 23, when pH value is reduced to a certain degree, after measuring the pH value in aeration displacement reaction pond 23 by aeration displacement reaction pond PH detection control instrument 24, claim after 21 Weighings through electron helical, by frequency conversion rotary feeder 22, according to the pH value in aeration displacement reaction pond 23, adjust the conveying capacity of calcium hydroxide by the mode changing rotating speed, calcium hydroxide is sent in aeration displacement reaction pond 23;
Desulfurization chemical reaction formula:
SO is absorbed in absorption tower
2:
2NaOH+SO
2→Na
2SO
3+H
2O
Na
2SO
3+SO
2+H
2O→2NaHSO
3
SO will be absorbed
2absorbing liquid deliver to aeration displacement reaction pond 23, carry out the precipitation of the oxidation of sulfurous sulphur root, the regeneration of absorbing liquid and solid by-product;
Blast air by roots blower 25, in aeration displacement reaction pond 23, oxidation reaction occurs;
Oxidation reaction: Na
2sO
3+ 0.5O
2→ Na
2sO
4
By adding the regeneration of calcium hydroxide to absorbing liquid and the precipitation of 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 Na of regeneration
2sO
3can recycle Deng desulfurizing agent;
As can be seen here, NaOH consumes fewer here, and after the circulation of Systemic absorption liquid, in fact main consumption is calcium hydroxide, and therefore operating cost is lower;
When desulfurizing tower 6 can not normally run, open by-passing valve 33, close electronic air inlet valve 4, make the flue gas through bag-type dust, enter chimney 34 by by-pass line 33 again through blower fan 3 and discharge.
As can be seen here, the utility model device denitrating technique is mainly reducing agent with urea granules, and with reaction of nitrogen oxides in burner hearth, in burner hearth, NOx is reduced to N
2and water; Adopt spray wet desulfurizing process, non-blind area, desulfuration efficiency is high, and investment operating cost is low, and reliability is high, and energy consumption is low, safeguards easily, the advantages such as floor space is little, system long service life, SO
2concentration of emission 30mg/Nm
3, the concentration of emission 80mg/Nm of NOx
3, dust emission concentration 15mg/Nm
3, be better than GB13223-2011 standard " fossil-fuel power plant atmospheric pollutant emission standard " (SO
2< 50mg/Nm
3, NOx < 100mg/Nm
3, dust emission concentration < 20mg/Nm
3), make flue gas qualified discharge, avoid environment.
Claims (1)
1. a fire coal boiler fume denitration in the stove wet desulphurization device, comprise coal-burning boiler, flue gas Online Monitoring Control device, sack cleaner, blower fan, desulfurizing tower, dehumidifying purifying column, chimney, it is characterized in that: described coal-burning boiler is linked in sequence flue gas Online Monitoring Control device, sack cleaner, blower fan, desulfurizing tower, dehumidifying purifying column, chimney, described flue gas Online Monitoring Control device connects frequency conversion rotary feeder, connect electron helical above frequency conversion rotary feeder to claim, electron helical claims to connect discharger, discharger connects urea granules feed bin, mixture generator is connected below frequency conversion rotary feeder, mixture generator one tunnel connects high pressure roots blower fan, urea granules playpipe of separately leading up to connects urea granules jet, urea granules jet is positioned at above the sidewall of coal-burning boiler burner hearth, connecting bypass pipeline between described fan outlet and electronic air inlet valve import, by-pass line is connected with chimney import, by-pass line is provided with by-passing valve, described electronic air inlet valve outlet is connected with desulfurizing tower air intake, desulfurizing tower air intake lower sides is provided with PH detection control instrument, PH detection control instrument 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, side, aeration displacement reaction pond is provided with roots blower, opposite side is provided with calcium hydroxide feed bin, calcium hydroxide feed bin connects discharger, discharger connects electron helical and 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 detection control instrument, aeration displacement reaction pond PH detection control instrument 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 detection control instrument, regulating reservoir PH detection control instrument 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, damp proof air cleaner is provided with in dehumidifying purifying column, the outer discharge pipe of dehumidifying purifying column waste liquid is provided with bottom dehumidifying purifying column, 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520208086.7U CN204502788U (en) | 2015-03-26 | 2015-03-26 | A kind of fire coal boiler fume denitration in the stove wet desulphurization device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520208086.7U CN204502788U (en) | 2015-03-26 | 2015-03-26 | A kind of fire coal boiler fume denitration in the stove wet desulphurization device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204502788U true CN204502788U (en) | 2015-07-29 |
Family
ID=53700792
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520208086.7U Expired - Fee Related CN204502788U (en) | 2015-03-26 | 2015-03-26 | A kind of fire coal boiler fume denitration in the stove wet desulphurization device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204502788U (en) |
-
2015
- 2015-03-26 CN CN201520208086.7U patent/CN204502788U/en not_active Expired - Fee Related
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