The present invention relates to a kind of flue gas treatment technology.
Summary of the invention:
Goal of the invention of the present invention be to provide a kind of can remove continuously sulfide in the flue gas, be discharged into solid matter content flue gas continous treatment process few, that meet discharge standard and device in the flue gas in the atmosphere.
Flue gas continous treatment process of the present invention is to realize like this, comprise sulphide removal process, smoke abatement process, the sulphide removal process is that the flue gas of high temperature, high turbulent condition is imported in the guide duct, reduce the turbulent flow of flue gas, simultaneously, spray alkali lye by the spout direction nozzle consistent with the flow direction of flue gas that is arranged on guide duct middle part with the form of the droplet of scattering, droplet alkali lye in guide duct with flue gas in the sulfide reaction, generation Na
2O
3, Na
2O
4Solution drips, Na
2O
3, Na
2O
4Solution drips, remaining alkali lye droplet under fume high-temperature, be dried into Na
2O
3, Na
2O
4Then dust, NaOH dust, contain Na after the sulphur removal
2O
3, Na
2O
4The flue gas of dust, NaOH dust imports the smoke abatement process, in the smoke abatement process, after filtering through several filter bags in the filter from the bottom up, from outside to inside, clean flue gas is discharged atmosphere by induced draft fan, chimney, comprises Na in the flue gas that filters down
2O
3, Na
2O
4Dust, NaOH dust are collected in the feeder below the filter, and the valvular floss hole of being with below feeder is drained, and comprises Na when the filter bag outer surface gathers
2O
3, Na
2O
4Behind the dust of dust, NaOH dust, close induced draft fan, compressed air sprays into sack by the spout above the sack that is positioned at each filter bag, form reverse high velocity air, and make filter bag acutely expand, shake, the dust that is gathered in the filter bag outer surface is shaken, recoils, and the dust that falls is collected in the feeder below the filter.Because the direction along flow of flue gas sprays into the alkali lye droplet in guide duct, like this, both reduced the unsettled turbulent condition of flue gas, simultaneously, make the alkali lye droplet can be stably with flue gas in sulfide carry out chemical reaction, generate Na
2O
3, Na
2O
4Solution drips, and then at high temperature, the water evaporation forms Na
2O
3, Na
2O
4Dust adopts with reverse compression air cleaner filter bag, can carry out quickly and easily the cleaning of filter bag, has guaranteed carrying out continuously of flue gas processing.
Here, in order further to reduce turbulent flow to improve the flow condition of flue gas, flue gas enters guide duct after sparing the wind section, and even wind section is to be densely covered with the radially air uniform device of pore.
Flue gas apparatus for continous treatment of the present invention is to realize like this, comprise the guide duct that links to each other with the flue gas source, the alkali lye injection apparatus, the smoke filter that links to each other with guide duct, air-introduced machine, chimney, the alkali lye injection apparatus comprises the alkali lye configured pool, the nozzle that links to each other with the Alkali liquid compounding pond by carrier pipe, nozzle links to each other with compressed air source by tracheae, the spout direction of nozzle is consistent with the flow of flue gas direction, guide duct comprises the gas-liquid mixed conversion zone, drying section, smoke filter comprises dirt pocket, be positioned at side below the dirt pocket with air inlet, the bottom is provided with the flue-dust retainer of ash discharging hole, be positioned at the air-purifying chamber with the pure qi (oxygen) exhaust outlet at dirt pocket top, in dirt pocket, be provided with filter bag, the mouth of filter bag is connected with air-purifying chamber, air inlet is connected with guide duct, the pure qi (oxygen) exhaust outlet is connected with the air inlet of air-introduced machine, the air outlet of air-introduced machine is connected with chimney, be provided with the compressed air spout directly over the mouth of the filter bag of air-purifying chamber, the compressed air spout links to each other with compressed air source by tracheae.During work, high temperature, high speed flue gas lower the turbulent flow of flue gas by the guiding of guide duct, like this, at the gas-liquid mixed conversion zone, the alkali lye droplet that nozzle sprays just can be blended in the flue gas equably, fast with stable flow consistent with flue gas flow direction, fully react with the sulfur oxide in the flue gas, generate Na
2O
3, Na
2O
4Solution drips, thereby effectively removes the strong sulfur oxide of corrosivity in the flue gas, enter drying section after, Na
2O
3, Na
2O
4Solution drip and the alkali lye droplet under the baking of the high temperature of flue gas, water flashes to steam, Na
2O
3, Na
2O
4,Alkali is mixed in the flue gas with the form of solid dust and enters smoke filter with flow of flue gas, and flue dust is filtered in smoke filter, falls in the flue-dust retainer, has filtered the purifying smoke behind the flue dust and has been discharged in the air through air-introduced machine, chimney.The flue dust that is gathered in the flue-dust retainer is drained by ash discharging hole; After the filter bag outer surface gathers flue dust, close down air-introduced machine, be blown into compressed air toward filtering sack, the flue dust shake that the mode by blowback will be attached to the filter bag outer surface falls, thereby realizes the purpose of cleaning filter bag.
Here, be provided with air uniform device in the import department of guide duct, air uniform device is to be densely covered with the radially device of pore.Like this, flue gas can reduce its turbulent condition greatly by behind the even wind of air uniform device.
The present invention compared with the prior art, have the sulfide that can remove continuously in the flue gas, be discharged into solid matter content in the flue gas in the atmosphere few, flue gas meets the advantage of discharge standard.
The specific embodiment:
Now in conjunction with the accompanying drawings and embodiments the present invention is done and describes in further detail:
Flue gas continous treatment process of the present invention is to realize like this, comprise sulphide removal process, smoke abatement process, the sulphide removal process is that the flue gas of high temperature, high turbulent condition is imported in the guide duct, reduce the turbulent flow of flue gas, simultaneously, spray alkali lye by the spout direction nozzle consistent with the flow direction of flue gas that is arranged on guide duct middle part with the form of the droplet of diameter between 50-100 μ m of scattering, droplet alkali lye in guide duct with flue gas in the sulfide reaction, generation Na
2O
3, Na
2O
4Solution drips, Na
2O
3, Na
2O
4Solution drips, remaining alkali lye droplet under fume high-temperature, be dried into Na
2O
3, Na
2O
4Dust, NaOH dust, after drop evaporated fully, sulfur oxide can continue to react with solid state N aOH dust, proceeds desulphurization reaction, then, contained Na after the sulphur removal
2O
3, Na
2O
4The flue gas of dust, NaOH dust imports the smoke abatement process, in the smoke abatement process, after filtering through several filter bags in the filter from the bottom up, from outside to inside, clean flue gas is discharged atmosphere by induced draft fan, chimney, comprises Na in the flue gas that filters down
2O
3, Na
2O
4Dust, NaOH dust are collected in the feeder below the filter, and the valvular floss hole of being with below feeder is drained, and comprises Na when the filter bag outer surface gathers
2O
3, Na
2O
4Behind the dust of dust, NaOH dust, close induced draft fan, compressed air sprays into sack by the spout above the sack that is positioned at each filter bag, form reverse high velocity air, and make filter bag acutely expand, shake, the dust that is gathered in the filter bag outer surface is shaken, recoils, and the dust that falls is collected in the feeder below the filter.
Flue gas enters guide duct after sparing the wind section, even wind section is to be densely covered with the radially air uniform device of pore.
Flue gas apparatus for continous treatment of the present invention is to realize like this, comprise the guide duct 1 that links to each other with the flue gas source, alkali lye injection apparatus 2, the smoke filter 3 that links to each other with guide duct 1, air-introduced machine 4, chimney 5, alkali lye injection apparatus 2 comprises alkali lye configured pool 6, the nozzle 8 that links to each other with Alkali liquid compounding pond 6 by carrier pipe 7, nozzle 8 links to each other with compressed air source 10 by tracheae 9, the spout direction of nozzle 8 is consistent with the flow of flue gas direction, guide duct 1 comprises gas-liquid mixed conversion zone 11, drying section 12, smoke filter 3 comprises dirt pocket 13, be positioned at side below the dirt pocket 13 with air inlet 14, the bottom is provided with the flue-dust retainer 16 with valvular ash discharging hole 15, be positioned at the air-purifying chamber 18 with pure qi (oxygen) exhaust outlet 17 at dirt pocket 13 tops, in dirt pocket 13, be provided with filter bag 19, the mouth 19a of filter bag 19 is connected with air-purifying chamber 13, air inlet 14 is connected with guide duct 1, pure qi (oxygen) exhaust outlet 17 is connected with the air inlet of air-introduced machine 4, the air outlet of air-introduced machine 4 is connected with chimney 5, be provided with compressed air spout 20 directly over the mouth 19a of the filter bag 19 of air-purifying chamber 13, compressed air spout 20 links to each other with compressed air source 10 by tracheae 9.
Import department at guide duct 1 is provided with air uniform device 21, and air uniform device 21 is to be densely covered with the radially device of pore.
Here, the state that couches is adopted in 1 one-tenth state setting that couches of guide duct, be conducive to the alkali lye droplet flue gas is flowed forward, has guaranteed fully the contacting of sulfur oxide, reaction in alkali lye droplet and the flue gas.