CN107631308A - A kind of system and method for high temperature incineration method processing acrylic nitrile waste water - Google Patents
A kind of system and method for high temperature incineration method processing acrylic nitrile waste water Download PDFInfo
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- CN107631308A CN107631308A CN201711034789.2A CN201711034789A CN107631308A CN 107631308 A CN107631308 A CN 107631308A CN 201711034789 A CN201711034789 A CN 201711034789A CN 107631308 A CN107631308 A CN 107631308A
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Abstract
The present invention provides a kind of system and method for high temperature incineration method processing acrylic nitrile waste water.Auxiliary fuel burners are located at the top of incinerator, and SNCR denitration device is set in incinerator bottom；Cooling blower connection incinerator bottom, the smoke inlet of waste heat boiler are joined directly together with burning outlet of still, and the exhanst gas outlet of waste heat boiler is connected with economizer.Combustion air after preheating is delivered to top entry, upper entrance, middle part circulating line entrance, the lower entrances of incinerator respectively, realizes staged air distribution；By adjusting waste liquid nozzle one, waste liquid nozzle two, middle part nozzle ring entrance one and nozzle ring entrance one control acrylic nitrile waste water to maintain the reducing atmosphere of incinerator with the ratio of combustion air from top entry, upper entrance, middle part circulating line entrance.The harmful substance high-temperature oxydation that the present invention is realized in acrylic nitrile waste water decomposes, and harmful substance clearance fully meets environmental protection index requirement up to more than 99.99%.
Description
Technical field
The invention belongs to chemical industrial organic wastewater to handle environmental technology field, and in particular to a kind of high temperature incineration method handles propylene
The system and method for nitrile waste water.
Background technology
The waste water that acrylic nitrile waste water produces essentially from acrylonitrile process, ABS plastic production, thiamines device, containing more
Pollutant, such as acrylonitrile, acetonitrile, hydrogen cyanide, heavy constituent (polymer), ammonium sulfate, sodium carbonate and catalyst fines.Propylene
Nitrile waste component is complicated, and toxicity is larger, and liquid containing ammonium sulfate, saliferous, and intractability is huge, need to consider discharged nitrous oxides,
Sulfur corrosion, salt corrosion, and energy rationally utilize, so increasingly complex handling process and system could meet to require.
The currently used industrial processing method of this waste water includes：Bioanalysis, Wet Catalytic Oxidation Method, high temperature incineration method.
Biological denitrificaion method is using nitrogen oxides in microorganism removing waste water, by nitrification, denitrification by nitrogen oxides
It is converted into N2Safety dumping air.But reaction rate is slow, treating capacity is low, and acrylonitrile is stronger to anaerobism mushroom toxin in waste water, greatly
Technical scale application treatment effect is unsatisfactory.
Processing of the Wet Catalytic Oxidation Method to high organic substance content wastewater is largely effective, has higher practical value.Third
Alkene nitrile waste water at high temperature under high pressure, maintains to be passed through air during liquid phase state, thoroughly oxidation point can be achieved under catalyst action
Solution, generates nontoxic material.But require high for equipment material, investment is big, and condition is harsh, though prospect is considerable, remains development
With perfect part.
High temperature incineration method flow is simple, efficient, to acrylic nitrile waste water flow and component fluctuation strong adaptability, it is possible to achieve third
The exhaustive oxidation of harmful substance decomposes in alkene nitrile waste water, but contain in N element, S elements and the combustion air contained in waste water
A large amount of N2, NO can be produced after burningxAnd SOx, secondary pollution is formed, increases the cost of environmental protection treatment, and the high temperature after high-temp combustion
Waste gas is directly discharged into air, causes energy waste.
The content of the invention
It is an object of the invention to：For nitrogenous, sulfur-bearing, dust-laden, not tractable characteristic in acrylic nitrile waste water, there is provided one
Kind is efficient, energy-conservation, environment-friendly high temperature incineration method and system processing acrylic nitrile waste water.Acrylic nitrile waste water of the present invention comes
From acrylonitrile process, ABS production waste water, in addition to acrylonitrile by-product thiamines device production waste water, ammonium sulfate waste water high temperature incineration
Produce NO simultaneouslyxAnd SOx, technique and system not only consider denitrogenation, also want desulfurization.
Realize the technical scheme of the object of the invention：A kind of system of high temperature incineration method processing acrylic nitrile waste water, the system bag
Incinerator is included, auxiliary fuel burners are located at the top of incinerator, and the upper lateral part of incinerator one is provided with waste liquid nozzle one and waste liquid nozzle
Two, middle part is nozzle ring entrance one and nozzle ring entrance two；Top entry is provided with the top of incinerator opposite side, top is provided with
Upper entrance, middle part are provided with middle part circulating line entrance, bottom is provided with lower entrances；Combustion fan connects combustion air-steam
Heat exchanger, combustion air after combustion-supporting air preheater preheats, are sent into top entry, upper entrance, middle part by combustion fan
Circulating line entrance, lower entrances, realize staged air distribution；SNCR denitration device is set in incinerator bottom；Cooling blower connects
Incinerator bottom, cooling air are delivered to incinerator and SNCR denitration device by cooling blower；The smoke inlet of waste heat boiler
It is joined directly together with burning outlet of still, the exhanst gas outlet of waste heat boiler is connected with economizer, feedwater preheater connection economizer
Boiler feedwater inlet, boiler feedwater enters waste heat boiler through feedwater preheater, and the steam (vapor) outlet connection of waste heat boiler is steamed
Vapour sub-cylinder, the steam (vapor) outlet of steam sub-cylinder are connected with combustion air-vapor heat exchanger steam inlet.
A kind of system of high temperature incineration method processing acrylic nitrile waste water as described above, the system also include electrostatic precipitator,
Described electrostatic precipitator one end is connected with economizer exit, and one end is connected with air-introduced machine；The air-introduced machine other end is answered with chilling alkali cleaning
Tower connection is closed, circulating pump is serially connected with chilling alkali cleaning combination tower.
A kind of system of high temperature incineration method processing acrylic nitrile waste water as described above, the system also include chimney, the cigarette
Chimney is connected with chilling alkali cleaning combination tower through pipeline, the clean tail gas after discharge processing.
A kind of method of high temperature incineration method processing acrylic nitrile waste water of the present invention, this method comprise the following steps：
Step 1：Combustion air is delivered in combustion-supporting air preheater by combustion fan and preheated, and preheating temperature is
150~300 DEG C, the top entry, upper entrance, middle part circulating line that the combustion air after preheating is delivered to incinerator respectively enter
Mouth, lower entrances, realize staged air distribution；Burning furnace temperature is adjusted by adjusting in auxiliary fuel burners fuel flow rate, is led to
Overregulate waste liquid nozzle one, waste liquid nozzle two, middle part nozzle ring entrance one and nozzle ring entrance one and control acrylic nitrile waste water
The reproducibility of incinerator is maintained with the ratio of combustion air from top entry, upper entrance, middle part circulating line entrance
Atmosphere, ensure peroxide in incinerator by controlling lower entrances combustion air flow, make waste water burning complete；It is cold by adjusting
But the flow of blower fan conveying cooling air reduces the temperature of incinerator cooling section；
Step 2：Boiler feedwater and economizer high temperature flue gas heat exchange, are preheated by feedwater preheater, are preheated
Temperature need to be higher than 30~50 DEG C of flue gas acid dew point, then into waste heat boiler；
Step 3：Acrylic nitrile waste water enters high temperature incineration in incinerator, and incineration temperature is 850~1300 DEG C；Then burning
Burn stove in set SNCR denitration device at denitration medium NH3Denitration, it is impregnated in cooling air before denitration and is down to 900~1000
℃；
Step 4：High-temperature flue gas caused by step 3 passes sequentially through waste heat boiler, economizer, and flue-gas temperature is reduced to 150
~300 DEG C.
A kind of method of high temperature incineration method processing acrylic nitrile waste water as described above, this method also include step 5 and step
Six,
Step 5, flue gas enters electrostatic precipitator dedusting by economizer after step 4 cooling；
Step 6, flue gas enters chilling alkali cleaning combination tower by air-introduced machine through flue after step 5 dedusting, and flue gas desulfurization is same
After Shi Wendu is reduced to 50~150 DEG C, air is directly drained into by chimney.
A kind of method of high temperature incineration method processing acrylic nitrile waste water as described above, the acrylic nitrile waste water described in it include third
Alkene nitrile C3H3N, acetonitrile C2H3N, hydrogen cyanogen HCN, with cyanogen root-CN, NO, NO are produced after burning2。
A kind of method of high temperature incineration method processing acrylic nitrile waste water as described above, its described step 3 include SNCR and taken off
The step of nitre, the denitration medium NH of SNCR denitration3Following reaction occurs：
4C3H3N+15O2→12CO2+2N2+6H2O
2C3H3N+9O2→6CO2+NO+NO2+3H2O
4C2H3N+11O2→8CO2+2N2+6H2O
2C2H3N+7O2→4CO2+NO+NO2+3H2O
4HCN+5O2→4CO2+2N2+2H2O
2HCN+4O2→2CO2+NO+NO2+H2O
4NH3+4NO+O2→4N2+6H2O
4NH3+2NO+2O2→3N2+6H2O
8NH3+6NO2→7N2+12H2O
A kind of method of high temperature incineration method processing acrylic nitrile waste water as described above, incinerator is negative in its described step 3
Press operation.
A kind of method of high temperature incineration method processing acrylic nitrile waste water as described above, in its described step 2 boiler feedwater pass through
Feedwater preheater enters waste heat boiler, and steam caused by waste heat boiler enters steam sub-cylinder by pipeline, and steam divides gas
The steam of cylinder enters combustion air-vapor heat exchanger and exchanged heat with combustion air, and warm-up combustion-supporting air saves combustion to 250~400 DEG C
Material.
A kind of method of high temperature incineration method processing acrylic nitrile waste water as described above, waste liquid nozzle one, waste liquid described in it
Nozzle two, middle part nozzle ring entrance one and nozzle ring entrance one are atomized into acrylic nitrile waste water is compressed after small droplet uniformly
Spray into incinerator.
The remarkable result of the present invention is：
The system of high temperature incineration method processing acrylic nitrile waste water of the present invention realizes the harmful substance such as third in acrylic nitrile waste water
Alkene nitrile, acetonitrile, the high-temperature oxydation of hydrogen cyanide and non-methane hydrocarbon decompose, and harmful substance clearance is up to more than 99.99%.This hair
The system of bright described high temperature incineration method processing acrylic nitrile waste water realizes flue-gas denitrification, desulfurization, dedusting, fully meets environmental protection index
It is required that it is a kind of environment-friendly processing acrylic nitrile waste water technique and system.
The system of high temperature incineration method processing acrylic nitrile waste water of the present invention realizes poisonous and harmful substance in waste water
Oxidation Decomposition, while avoid burning process from producing NOXSecondary pollution, NOXDischarge be less than 150mg/m3, electrostatic precipitator takes off
Smoke abatement, dust content are less than 20mg/m3, the desulfurization simultaneously of chilling alkali cleaning combination tower chilling, sulfur content is less than 50mg/m3, index is excellent
In environment protection emission requirement, flue gas qualified discharge.
The present invention is applied to the harmless treatment of acrylic nitrile waste water caused by acrylonitrile installation, overcomes conventional high-temperature burning
The shortcomings that high energy consumption of processing method and the limitation of Wet Catalytic Oxidation Method, have flow simple, operation and it is easy to maintenance,
The features such as feasibility is strong, environmentally friendly, efficient.
Brief description of the drawings
Fig. 1 is the system schematic that a kind of high temperature incineration method of the present invention handles acrylic nitrile waste water；
In figure：1. incinerator；2. auxiliary fuel burners；3.SNCR denitrification apparatus；4. waste heat boiler；5. economizer；6.
Boiler feedwater heat exchanger；7. combustion air-vapor heat exchanger；8. combustion fan；9. cooling blower；10. steam sub-cylinder；11.
Electrostatic precipitator；12. air-introduced machine；13. chilling alkali cleaning combination tower；14. circulating pump；15. chimney；16. waste liquid nozzle one；It is 17. useless
Nozzle for liquid two；18. nozzle ring entrance one；19. nozzle ring entrance two；20. top entry；21. upper entrance；22. middle part
Circulating line entrance；23. lower entrances.
Embodiment
Acrylic nitrile waste water is handled to a kind of high temperature incineration method of the present invention with specific embodiment below in conjunction with the accompanying drawings
System and method is further described.
Embodiment 1
As shown in figure 1, a kind of system of high temperature incineration method processing acrylic nitrile waste water of the present invention, it includes incinerator
1, auxiliary fuel burners 2 are located at the top of incinerator 1, and the upper lateral part of incinerator 1 one is provided with waste liquid nozzle 1 and waste liquid nozzle two
17, middle part is nozzle ring entrance 1 and nozzle ring entrance 2 19；
Top entry 20 is provided with the top of the opposite side of incinerator 1, top is provided with upper entrance 21, middle part is provided with middle part ring pipe
Road entrance 22, bottom are provided with lower entrances 23；
Combustion fan 8 connects combustion air-vapor heat exchanger 7, and combustion air is preheated by combustion fan 8 through combustion air
After device 7 preheats, top entry 20, upper entrance 21, middle part circulating line entrance 22, lower entrances 23 are sent into, realize grade separation
Wind；
SNCR denitration device 3 is set in the bottom of incinerator 1；Cooling blower 9 connects the bottom of incinerator 1, and cooling air passes through
Cooling blower 9 is delivered to incinerator 1 and SNCR denitration device 3；
The smoke inlet of waste heat boiler 4 is joined directly together with the outlet of incinerator 1, exhanst gas outlet and the economizer 5 of waste heat boiler 4
Connection, feedwater preheater 6 connect economizer 5 boiler feedwater inlet, boiler feedwater through feedwater preheater 6 enter more than
Heat boiler 4, the steam (vapor) outlet connection steam sub-cylinder 10 of waste heat boiler 4, the steam (vapor) outlet of steam sub-cylinder 10 and combustion air-
The steam inlet of vapor heat exchanger 7 connects.
The one end of electrostatic precipitator 11 is connected with the outlet of economizer 5, and one end is connected with air-introduced machine 12；The other end of air-introduced machine 12 with
Chilling alkali cleaning combination tower 13 is connected, and circulating pump 14 is serially connected with chilling alkali cleaning combination tower 13.Chimney 15 and chilling alkali cleaning combination tower
13 are connected through pipeline, the clean tail gas after discharge processing.
Embodiment 2
As shown in figure 1, a kind of method of high temperature incineration method processing acrylic nitrile waste water of the present invention, it includes following step
Suddenly：
Step 1：Combustion air is delivered in combustion-supporting air preheater 7 by combustion fan 8 and preheated, preheating temperature
For 150~300 DEG C (such as：150 DEG C, 220 DEG C or 300 DEG C), the combustion air after preheating is delivered to the top of incinerator 1 respectively
Entrance 20, upper entrance 21, middle part circulating line entrance 22, lower entrances 23, realize staged air distribution；By adjusting auxiliary fuel
Fuel flow rate adjusts the temperature of incinerator 1 in burner 2, by adjusting waste liquid nozzle 1, waste liquid nozzle 2 17, middle part annular
Nozzle entrance 1 and nozzle ring entrance 1 control acrylic nitrile waste water with coming from top entry 20, upper entrance 21, middle part
The ratio of the combustion air of circulating line entrance 22 maintains the reducing atmosphere of incinerator 1, by controlling lower entrances 23 to help
Air mass flow is fired to ensure peroxide in incinerator 1, makes waste water burning complete；Cooling air is conveyed by adjusting cooling blower 9
Flow reduces the temperature of the cooling section of incinerator 1；
Step 2：Boiler feedwater and the high temperature flue gas heat exchange of economizer 5, are preheated, in advance by feedwater preheater 6
Hot temperature need to be higher than 30~50 DEG C of flue gas acid dew point (such as：30 DEG C, 40 DEG C or 50 DEG C), then into waste heat boiler 4；Waste heat pot
Steam caused by stove 4 enters steam sub-cylinder 10 by pipeline, and the steam of steam sub-cylinder 10 enters combustion air-steam heat-exchanging
Device 7 exchanges heat with combustion air；
Step 3：Acrylic nitrile waste water enter incinerator 1 in high temperature incineration, incineration temperature be 850~1300 DEG C (such as：850
DEG C, 1000 DEG C or 1300 DEG C)；Incinerator 1 is negative-pressure operation；Then the SNCR denitration device 3 set in incinerator and denitration
Medium NH3Denitration, be impregnated in before denitration cooling air be down to 900~1000 DEG C (such as：900 DEG C, 950 DEG C or 1000 DEG C)；
Step 4：High-temperature flue gas caused by step 3 passes sequentially through waste heat boiler 4, economizer 5, and flue-gas temperature is reduced to
150~300 DEG C (such as：150 DEG C, 220 DEG C or 300 DEG C)；
Step 5, flue gas by economizer 5 by entering the dedusting of electrostatic precipitator 11 after step 4 cooling；
Step 6, flue gas enters chilling alkali cleaning combination tower 13 by air-introduced machine 12 through flue after step 5 dedusting, and flue gas takes off
Sulphur simultaneously temperature be reduced to 50~150 DEG C (such as：50 DEG C, 100 DEG C or 150 DEG C) after, air is directly drained into by chimney 15.
Acrylic nitrile waste water of the present invention includes acrylonitrile C3H3N, acetonitrile C2H3N, hydrogen cyanogen HCN, with cyanogen root-CN,
NO, NO are produced after burning2.Described waste liquid nozzle 1, waste liquid nozzle 2 17, middle part nozzle ring entrance 1 and annular spray
Compressed be atomized into after small droplet of acrylic nitrile waste water is uniformly sprayed into incinerator 1 by mouth entrance 1.Step 3 includes SNCR and taken off
The step of nitre, the denitration medium NH of SNCR denitration3Following reaction occurs：
4C3H3N+15O2→12CO2+2N2+6H2O
2C3H3N+9O2→6CO2+NO+NO2+3H2O
4C2H3N+11O2→8CO2+2N2+6H2O
2C2H3N+7O2→4CO2+NO+NO2+3H2O
4HCN+5O2→4CO2+2N2+2H2O
2HCN+4O2→2CO2+NO+NO2+H2O
4NH3+4NO+O2→4N2+6H2O
4NH3+2NO+2O2→3N2+6H2O
8NH3+6NO2→7N2+12H2O
The abundant recovered flue gas heat of system of high temperature incineration method processing acrylic nitrile waste water of the present invention, sets waste heat pot
Stove recovery high-temperature flue gas heat produces the steam that factory needs and reduces flue-gas temperature.In order to ensure that economizer does not corrode,
Boiler feedwater is preheated by feedwater preheater using high-temperature flue gas heat so that boiler feedwater preheating temperature is higher than province's coal
The dew-point temperature of device furnace tube outer wall flue gas.Combustion air is preheated by combustion-supporting air preheater using the steam of output,
The utilization to the energy is realized, saves fuel.The system of high temperature incineration method processing acrylic nitrile waste water of the present invention uses negative pressure
Operation.Flue gas is extracted out by air-introduced machine after removing dust, delivers to chilling alkali cleaning combination tower.High temperature incineration method processing third of the present invention
The system of alkene nitrile waste water makes flue gas inversely be contacted with circulating absorption solution, realizes the urgency of flue gas by chilling alkali cleaning combination tower desulfurization
The purpose of cold cooling and desulfurization.After over-quenching tower and absorption tower, SO in flue gas2Absorbed, flue gas qualified discharge can be met,
Directly by smoke stack emission.Circulating absorption solution is periodically discharged after reaching upper limit of concentration.
The composition and state parameter of pending acrylic nitrile waste water are as follows：
Flue gas composition after burning is as follows：
| Primary product composition | Product assay | Unit |
| N2 | 97250 | kg/h |
| O2 | 16708 | kg/h |
| CO2 | 9836 | kg/h |
| H2O | 15537 | kg/h |
| NOx | 1.412 | kg/h |
| Particles | 26.377 | kg/h |
| SOx | 115.15 | kg/h |
Flue gas composition after electrostatic precipitation is as follows：
| Primary product composition | Product assay | Unit |
| N2 | 97250 | kg/h |
| O2 | 16708 | kg/h |
| CO2 | 9836 | kg/h |
| H2O | 15537 | kg/h |
| NOx | 1.412 | kg/h |
| Particles | 0.001 | kg/h |
| SOx | 115.15 | kg/h |
Flue gas composition after chilling alkali cleaning combination tower desulfurization is as follows：
| Primary product composition | Product assay | Unit |
| N2 | 97250 | kg/h |
| O2 | 16708 | kg/h |
| CO2 | 9836 | kg/h |
| H2O | 15537 | kg/h |
| NOx | 1.412 | kg/h |
| Particles | 0.001 | kg/h |
| SOx | 0.001 | kg/h |
Experimental result and analysis：From above-mentioned experimental data, NOXDischarge be less than 150mg/m3, electrostatic precipitator removing
Flue dust, dust content are less than 20mg/m3, the desulfurization simultaneously of chilling alkali cleaning combination tower chilling, sulfur content is less than 50mg/m3, index is superior to
Environment protection emission requirement, flue gas qualified discharge.
Claims (10)
- A kind of 1. system of high temperature incineration method processing acrylic nitrile waste water, it is characterised in that：The system includes incinerator (1), auxiliary Fuel burner (2) is located at the top of incinerator (1), and the upper lateral part of incinerator (1) one is provided with waste liquid nozzle one (16) and waste liquid nozzle Two (17), middle part are nozzle ring entrance one (18) and nozzle ring entrance two (19)；Top entry (20) is provided with the top of incinerator (1) opposite side, top is provided with upper entrance (21), middle part is provided with middle part annular Entrance (22), bottom are provided with lower entrances (23)；Combustion fan (8) connection combustion air-vapor heat exchanger (7), combustion air are pre- through combustion air by combustion fan (8) After hot device (7) preheating, top entry (20), upper entrance (21), middle part circulating line entrance (22), lower entrances are sent into (23) staged air distribution, is realized；SNCR denitration device (3) is set in incinerator (1) bottom；Cooling blower (9) connects incinerator (1) bottom, cooling air Incinerator (1) and SNCR denitration device (3) are delivered to by cooling blower (9)；The smoke inlet of waste heat boiler (4) is joined directly together with incinerator (1) outlet, and the exhanst gas outlet of waste heat boiler (4) is with saving coal Device (5) connects, and the boiler feedwater inlet of feedwater preheater (6) connection economizer (5), boiler feedwater preheats through boiler feedwater Device (6) enters waste heat boiler (4), and the steam (vapor) outlet of waste heat boiler (4) connects steam sub-cylinder (10), steam sub-cylinder (10) Steam (vapor) outlet is connected with combustion air-vapor heat exchanger (7) steam inlet.
- A kind of 2. system of high temperature incineration method processing acrylic nitrile waste water according to claim 1, it is characterised in that：The system Also include electrostatic precipitator (11), described electrostatic precipitator (11) one end is connected with economizer (5) outlet, one end and air-introduced machine (12) it is connected；Air-introduced machine (12) other end is connected with chilling alkali cleaning combination tower (13), is serially connected with chilling alkali cleaning combination tower (13) Circulating pump (14).
- A kind of 3. system of high temperature incineration method processing acrylic nitrile waste water according to claim 1, it is characterised in that：The system Also include chimney (15), the chimney (15) is connected with chilling alkali cleaning combination tower (13) through pipeline, the clean tail after discharge processing Gas.
- A kind of 4. method of high temperature incineration method processing acrylic nitrile waste water, it is characterised in that：This method comprises the following steps：Step 1：Combustion air is delivered in combustion-supporting air preheater (7) by combustion fan (8) and preheated, preheating temperature For 150~300 DEG C, the combustion air after preheating be delivered to respectively the top entry (20) of incinerator (1), upper entrance (21), Middle part circulating line entrance (22), lower entrances (23), realize staged air distribution；Fired by adjusting in auxiliary fuel burners (2) Stream amount adjusts incinerator (1) temperature, by adjusting waste liquid nozzle one (16), waste liquid nozzle two (17), middle part nozzle ring Entrance one (18) and nozzle ring entrance one (19) control acrylic nitrile waste water with from top entry (20), upper entrance (21), The ratio of the combustion air of middle part circulating line entrance (22) maintains the reducing atmosphere of incinerator (1), by controlling bottom Entrance (23) combustion air flow ensures incinerator (1) interior peroxide, makes waste water burning complete；By adjusting cooling blower (9) Conveying the flow of cooling air reduces the temperature of incinerator (1) cooling section；Step 2：Boiler feedwater and economizer (5) high temperature flue gas heat exchange, are preheated, in advance by feedwater preheater (6) Hot temperature need to be higher than 30~50 DEG C of flue gas acid dew point, then into waste heat boiler (4)；Step 3：Acrylic nitrile waste water enters incinerator (1) interior high temperature incineration, and incineration temperature is 850~1300 DEG C；Then burning SNCR denitration device (3) place set in stove and denitration medium NH3Denitration, be impregnated in before denitration cooling air be down to 900~ 1000℃；Step 4：High-temperature flue gas caused by step 3 passes sequentially through waste heat boiler (4), economizer (5), and flue-gas temperature is reduced to 150~300 DEG C.
- A kind of 5. method of high temperature incineration method processing acrylic nitrile waste water according to claim 4, it is characterised in that：This method Also include step 5 and step 6,Step 5, flue gas enters electrostatic precipitator (11) dedusting by economizer (5) after step 4 cooling；Step 6, flue gas enters chilling alkali cleaning combination tower (13) by air-introduced machine (12) through flue after step 5 dedusting, and flue gas takes off After sulphur while temperature are reduced to 50~150 DEG C, air is directly drained into by chimney (15).
- A kind of 6. method of high temperature incineration method processing acrylic nitrile waste water according to according to claim 4, it is characterised in that：It is described Acrylic nitrile waste water include acrylonitrile C3H3N, acetonitrile C2H3N, hydrogen cyanogen HCN, with cyanogen root-CN, NO, NO are produced after burning2。
- A kind of 7. method of high temperature incineration method processing acrylic nitrile waste water according to according to claim 4, it is characterised in that：It is described Step 3 includes the step of SNCR denitration, the denitration medium NH of SNCR denitration3Following reaction occurs：4C3H3N+15O2→12CO2+2N2+6H2O2C3H3N+9O2→6CO2+NO+NO2+3H2O4C2H3N+11O2→8CO2+2N2+6H2O2C2H3N+7O2→4CO2+NO+NO2+3H2O4HCN+5O2→4CO2+2N2+2H2O2HCN+4O2→2CO2+NO+NO2+H2O4NH3+4NO+O2→4N2+6H2O4NH3+2NO+2O2→3N2+6H2O8NH3+6NO2→7N2+12H2O。
- A kind of 8. method of high temperature incineration method processing acrylic nitrile waste water according to according to claim 4, it is characterised in that：It is described Incinerator (1) is negative-pressure operation in step 3.
- A kind of 9. method of high temperature incineration method processing acrylic nitrile waste water according to according to claim 4, it is characterised in that：It is described Boiler feedwater enters waste heat boiler (4) through feedwater preheater (6) in step 2, and steam caused by waste heat boiler (4) passes through Pipeline enters steam sub-cylinder (10), and the steam of steam sub-cylinder (10) enters combustion air-vapor heat exchanger (7) and combustion-supporting sky Gas exchanges heat, and warm-up combustion-supporting air saves fuel to 250~400 DEG C.
- A kind of 10. method of high temperature incineration method processing acrylic nitrile waste water according to according to claim 4, it is characterised in that：Institute Waste liquid nozzle one (16), waste liquid nozzle two (17), middle part nozzle ring entrance one (18) and the nozzle ring entrance one (19) stated By the compressed uniform penetrating incinerator (1) after being atomized into small droplet of acrylic nitrile waste water.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711034789.2A CN107631308A (en) | 2017-10-30 | 2017-10-30 | A kind of system and method for high temperature incineration method processing acrylic nitrile waste water |
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|---|---|---|---|
| CN201711034789.2A CN107631308A (en) | 2017-10-30 | 2017-10-30 | A kind of system and method for high temperature incineration method processing acrylic nitrile waste water |
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| CN107631308A true CN107631308A (en) | 2018-01-26 |
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Cited By (7)
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| CN109974014A (en) * | 2019-03-26 | 2019-07-05 | 中化泉州石化有限公司 | A kind for the treatment of method for high-salinity wastewater of propylene oxide/styrene combined production device |
| CN110877899A (en) * | 2018-09-06 | 2020-03-13 | 中国石油化工股份有限公司 | Method for treating low-concentration sulfur-containing acidic gas |
| CN112944371A (en) * | 2021-04-16 | 2021-06-11 | 重庆贯通生物科技有限公司 | Organic waste liquid harmless treatment method and treatment equipment |
| CN113864789A (en) * | 2021-09-16 | 2021-12-31 | 上海瑞鼎环境工程技术有限公司 | Incineration system for treating sulfur-containing, nitrogen-containing and salt-containing waste liquid |
| CN114110618A (en) * | 2021-11-08 | 2022-03-01 | 北京航化节能环保技术有限公司 | Combustion device for treating acrylonitrile wastewater |
| CN115681993A (en) * | 2022-11-12 | 2023-02-03 | 江苏大鸿环保设备有限公司 | High-temperature combustion-supporting air distribution system of hazardous waste garbage incinerator and use method thereof |
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| CN108726614A (en) * | 2018-05-31 | 2018-11-02 | 平原中德泰兴环保科技装备有限公司 | A kind of industrial waste treatment process and its device |
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| CN109974014A (en) * | 2019-03-26 | 2019-07-05 | 中化泉州石化有限公司 | A kind for the treatment of method for high-salinity wastewater of propylene oxide/styrene combined production device |
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| CN113864789A (en) * | 2021-09-16 | 2021-12-31 | 上海瑞鼎环境工程技术有限公司 | Incineration system for treating sulfur-containing, nitrogen-containing and salt-containing waste liquid |
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| CN115681993A (en) * | 2022-11-12 | 2023-02-03 | 江苏大鸿环保设备有限公司 | High-temperature combustion-supporting air distribution system of hazardous waste garbage incinerator and use method thereof |
| CN115681993B (en) * | 2022-11-12 | 2023-08-04 | 江苏大鸿环保设备有限公司 | High-temperature combustion-supporting air distribution system of hazardous waste incinerator and application method thereof |
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