A kind of Graphene produces waste water high-efficiency processing method
Technical field
The invention belongs to industrial production wastewater processing technology field, and in particular to a kind of Graphene production waste water high-efficiency is processed
Method.
Background technology
The waste water such as pickling are produced in the production process of Graphene, in waste water, contains acid, salt, COD, suspension and phosphorus, wherein
Predominant amount is nitrate and sulfate and manganese salt, and wherein COD is 500-600mg/L, and sulfate is 2500-4100mg/L, nitre
Hydrochlorate is 1000-1900mg/L, and manganese salt is 405-520mg/L, and pH value 1-2 is strong acid haline water, so can not use at biochemical process
Reason.At present, common process is acid-base neutralization, reprecipitation process.The technique can not remove nitrate, so total nitrogen index is very high,
Municipal sewage plant adapter standard can not be met.The minimizing technology of nitrate have ferrous salt and aluminium powder by the nitrate reduction in water into
Ammonia, but ammonia can not be directly discharged into air, so, in addition it is also necessary to the absorption plant of ammonia is invested, needs to adjust pH value to 10.Work as nitric acid
When salinity is high, the surface of aluminium can generate oxide-film and prevent reaction from occurring.Also reverse osmosis process, electrodialysis, ion-exchange,
But all there is concentrated water process problem.
So the main difficulty of Graphene wastewater treatment is:One, nitrate are very high, processing cost and cost of investment compared with
It is high;Two, sulfate is very high, and processing cost and cost of investment are higher;It is three, because salt content is high, acid relatively strong, so can not
Processed with biochemical process.
The content of the invention
It is an object of the invention to provide a kind of Graphene production wastewater treatment is thorough, effluent quality is good, flow process is short, equipment is thrown
Money less, solid waste recoverable, the Graphene production wastewater treatment method for being conducive to energy-conserving and environment-protective.
A kind of Graphene of the present invention produces waste water high-efficiency processing method, comprises the following steps:
1) removal of nitrate and total nitrogen:Waste water enters regulating reservoir, by air compressor machine air stirring, homogeneous water quantity and quality,
Water outlet is boosted to be pumped into except nitre tower, and in tower adds sulfamic acid, except placement zinc powder filler and zeolite in nitre tower, and mixes
Al catalysts, regulation pH be 1-2, reacted water outlet enter zinc salt recovery pond;
2) recycling of zinc:To in the recovery pond of zinc salt, add sodium carbonate reaction, pH to be adjusted to 6.5-7.5 or so, enter
Enter High-rate sedimentation separator, by the zinc carbonate precipitate and separate of reaction out, Jing sludge pumps are promoted to plate and frame filter press, thickening
Afterwards, rotary kiln heating is sent into, then Jing heat exchangers again, cloth bag separator is entered after cooling, zinc oxide finished product is collected, is reclaimed and is used
Produce in zinc oxide, the water outlet of High-rate sedimentation separator enters manganese salt High-rate sedimentation separator;
3) recycling of manganese:In manganese salt High-rate sedimentation separator, in coagulation area addition PAC, 30% NaOH,
PH is adjusted to into 8-9, subsequently into flocculation zone, PAM is added, the water outlet Jing after flocculation flows into settling zone, and manganese salt precipitate and separate is gone out
Come, Jing sludge pumps send into plate and frame filter press, after thickening, reclaim and produce for manganese, the water outlet of manganese salt High-rate sedimentation separator
Into sulfate High-rate sedimentation separator;
4) removal of sulfate:Milk of lime is added in sulfate High-rate sedimentation separator, pH value is adjusted to into 10.4-
11, and PAC and PAM is added, sulfate flocculation is settled out, Jing sludge pumps send into plate and frame filter press, after thickening, gypsum outward transport
Process, supernatant enters discharge bay, up to standard to enter municipal sewage plant.
It is 200-300 mesh except zinc powder filler is placed in nitre tower, filling rate 5%-10%;Zeolite be 15-20 mesh, filling rate
1%-5%.
Step 1) in Al catalysts amount for zinc powder amount of filler 1 ‰ -1.8 ‰.
Step 2) in rotary furnace temperature be 290-300 DEG C.
Compared with prior art, the beneficial effects of the present invention is:
Graphene production waste water need not adjust pH value, can directly pass through the synergy of zinc and aluminium, by the nitric acid in water
Salt and nitrate reductase are nitrogen, can be directly discharged in air;Reacted by soda ash, produce zinc carbonate, by fixed-end forces
Unit can be recycled;By control ph scope, manganese and sulfate radical are separated and recovered, do not result in the mutually dry of each ion
Disturb;The method is removed more thoroughly, and technological process is brief, and effluent quality is good, and equipment needed thereby small investment, is taken up an area and is saved, and solid waste can be complete
Portion recycles, and is conducive to energy-conserving and environment-protective, with higher economic benefit and social benefit.
Specific embodiment
Embodiment 1
A kind of Graphene of the present invention produces waste water high-efficiency processing method, comprises the following steps:
1) removal of nitrate and total nitrogen:Waste water enters regulating reservoir, by air compressor machine air stirring, homogeneous water quantity and quality,
Water outlet is boosted to be pumped into except nitre tower, and sulfamic acid 2000mg/L is added in tower, except placement zinc powder filler and boiling in nitre tower
Stone, places zinc powder filler for 200 mesh, filling rate 5%;Zeolite is 15 mesh, filling rate 1%, and mix Al catalysts, Al catalysts
Amount be the 1 ‰ of zinc powder amount of filler, it is 1.5 to adjust pH, and NO3-N and NO2-N when pH value is 1.5 and in water occurs oxygen
Change reduction reaction, the reaction time is 1h, the nitrate in water is nitrite by zinc powder reduction, and nitrite Jing sulfamic acids are also
Originally it was that nitrogen can be directly discharged in air, reacted water outlet enters the recovery pond of zinc salt;
2) recycling of zinc:To in the recovery pond of zinc salt, add sodium carbonate 1060mg/L reactions, pH to be adjusted to 6.5, enter
Enter High-rate sedimentation separator, by the zinc carbonate precipitate and separate of reaction out, Jing sludge pumps are promoted to plate and frame filter press, thickening
Afterwards, send into rotary kiln and be heated to 290 DEG C, then Jing heat exchangers again, after cooling, enter cloth bag separator, collect zinc oxide into
Product, reclaim and produce for zinc oxide, and the water outlet of High-rate sedimentation separator enters manganese salt High-rate sedimentation separator;
3) recycling of manganese:In the manganese salt High-rate sedimentation separator, coagulation area add 10mg/L PAC, 30%
PH is adjusted to 8.3 by NaOH 1mg/L, subsequently into flocculation zone, adds the PAM of 0.5mg/L, and the water outlet Jing after flocculation is flowed into
Settling zone, by manganese salt precipitate and separate out, Jing sludge pumps send into plate and frame filter press, after thickening, reclaim and produce for manganese, manganese
The water outlet of salt High-rate sedimentation separator enters sulfate High-rate sedimentation separator;
4) removal of sulfate:Milk of lime 253mg/L is added in sulfate High-rate sedimentation separator, pH value is adjusted to
10.5, and the PAM of the PAC and 0.7mg/L of 15mg/L is added, sulfate flocculation is settled out, Jing sludge pumps send into plate and frame filter press,
After thickening, gypsum outward transport is processed, and supernatant enters discharge bay, up to standard to enter municipal sewage plant.
The water analysis data in 1 different disposal stage of the present embodiment are as shown in table 1.
The water quality data in 1 different disposal stage of table
Embodiment 2
A kind of Graphene of the present invention produces waste water high-efficiency processing method, comprises the following steps:
1) removal of nitrate and total nitrogen:Waste water enters regulating reservoir, by air compressor machine air stirring, homogeneous water quantity and quality,
Water outlet is boosted to be pumped into except nitre tower, and sulfamic acid 4000mg/L is added in tower, except placement zinc powder filler and boiling in nitre tower
Stone, places zinc powder filler for 300 mesh, filling rate 10%;Zeolite is 20 mesh, filling rate 5%, and mix Al catalysts, aluminium catalysis
The amount of agent for zinc powder amount of filler 1.2 ‰, it is 1.0 to adjust pH, and the NO3-N and NO2-N when pH value is 1 and in water is sent out
Raw redox reaction, the reaction time is 1h, and the nitrate in water is nitrite by zinc powder reduction, nitrite Jing amino sulphurs
Acid is reduced to nitrogen and can be directly discharged in air, and reacted water outlet enters the recovery pond of zinc salt;
2) recycling of zinc:To in the recovery pond of zinc salt, add sodium carbonate 1410mg/L reactions, pH to be adjusted to 7.5, enter
Enter High-rate sedimentation separator, by the zinc carbonate precipitate and separate of reaction out, Jing sludge pumps are promoted to plate and frame filter press, thickening
Afterwards, send into rotary kiln and be heated to 300 DEG C, then Jing heat exchangers again, after cooling, enter cloth bag separator, collect zinc oxide into
Product, reclaim and produce for zinc oxide, and the water outlet of High-rate sedimentation separator enters manganese salt High-rate sedimentation separator;
3) recycling of manganese:In the manganese salt High-rate sedimentation separator, coagulation area add 15mg/L PAC, 30%
PH is adjusted to 9 by NaOH 1.8mg/L, subsequently into flocculation zone, adds the PAM of 0.5mg/L, and the water outlet Jing after flocculation is flowed into
Settling zone, by manganese salt precipitate and separate out, Jing sludge pumps send into plate and frame filter press, after thickening, reclaim and produce for manganese, manganese
The water outlet of salt High-rate sedimentation separator enters sulfate High-rate sedimentation separator;
4) removal of sulfate:Milk of lime 740mg/L is added in sulfate High-rate sedimentation separator, pH value is adjusted to
11.0, and the PAM of the PAC and 0.9mg/L of 20mg/L is added, sulfate flocculation is settled out, Jing sludge pumps send into plate and frame filter press,
After thickening, gypsum outward transport is processed, and supernatant enters discharge bay, up to standard to enter municipal sewage plant.
The water analysis data in 2 different disposal stage of the present embodiment are as shown in table 2.
The water quality data in 2 different disposal stage of table
Embodiment 3
A kind of Graphene of the present invention produces waste water high-efficiency processing method, comprises the following steps:
1) removal of nitrate and total nitrogen:Waste water enters regulating reservoir, by air compressor machine air stirring, homogeneous water quantity and quality,
Water outlet is boosted to be pumped into except nitre tower, and sulfamic acid 3000mg/L is added in tower, except placement zinc powder filler and boiling in nitre tower
Stone, places zinc powder filler for 250 mesh, filling rate 7%;Zeolite is 18 mesh, filling rate 3%, and mix Al catalysts, Al catalysts
Amount be the 1.2 ‰ of zinc powder amount of filler, it is 1.0 to adjust pH, and NO3-N and NO2-N when pH value is 1.0 and in water occurs
Redox reaction, reaction time are 1h, the nitrate in water by zinc powder reduction be nitrite, nitrite Jing sulfamic acids
It is reduced to nitrogen to be directly discharged in air, reacted water outlet enters the recovery pond of zinc salt;
2) recycling of zinc:To in the recovery pond of zinc salt, add sodium carbonate 1200mg/L reactions, pH to be adjusted to 7.0, enter
Enter High-rate sedimentation separator, by the zinc carbonate precipitate and separate of reaction out, Jing sludge pumps are promoted to plate and frame filter press, thickening
Afterwards, send into rotary kiln and be heated to 295 DEG C, then Jing heat exchangers again, after cooling, enter cloth bag separator, collect zinc oxide into
Product, reclaim and produce for zinc oxide, and the water outlet of High-rate sedimentation separator enters manganese salt High-rate sedimentation separator;
3) recycling of manganese:In the manganese salt High-rate sedimentation separator, coagulation area add 20mg/L PAC, 30%
PH is adjusted to 8.9 by NaOH 1.5mg/L, subsequently into flocculation zone, adds the PAM of 1.0mg/L, Jing after flocculation goes out current
Enter settling zone, by manganese salt precipitate and separate out, Jing sludge pumps send into plate and frame filter press, after thickening, reclaim and produce for manganese,
The water outlet of manganese salt High-rate sedimentation separator enters sulfate High-rate sedimentation separator;
4) removal of sulfate:Milk of lime 610mg/L is added in sulfate High-rate sedimentation separator, pH value is adjusted to
10.9, and the PAM of the PAC and 1.0mg/L of 16mg/L is added, sulfate flocculation is settled out, Jing sludge pumps send into plate and frame filter press,
After thickening, gypsum outward transport is processed, and supernatant enters discharge bay, up to standard to enter municipal sewage plant.
The water analysis data in 3 different disposal stage of the present embodiment are as shown in table 3.
The water quality data in 3 different disposal stage of table
Embodiment 4
A kind of Graphene of the present invention produces waste water high-efficiency processing method, comprises the following steps:
1) removal of nitrate and total nitrogen:Waste water enters regulating reservoir, by air compressor machine air stirring, homogeneous water quantity and quality,
Water outlet is boosted to be pumped into except nitre tower, and sulfamic acid 3200mg/L is added in tower, except placement zinc powder filler and boiling in nitre tower
Stone, places zinc powder filler for 300 mesh, filling rate 8%;Zeolite is 20 mesh, filling rate 2%, and mix Al catalysts, Al catalysts
Amount be the 1.1 ‰ of zinc powder amount of filler, it is 1.8 to adjust pH, and NO3-N and NO2-N when pH value is 1.8 and in water occurs
Redox reaction, reaction time are 1h, the nitrate in water by zinc powder reduction be nitrite, nitrite Jing sulfamic acids
It is reduced to nitrogen to be directly discharged in air, reacted water outlet enters the recovery pond of zinc salt;
2) recycling of zinc:To in the recovery pond of zinc salt, add sodium carbonate 1100mg/L reactions, pH to be adjusted to 7.2, enter
Enter High-rate sedimentation separator, by the zinc carbonate precipitate and separate of reaction out, Jing sludge pumps are promoted to plate and frame filter press, thickening
Afterwards, send into rotary kiln and be heated to 300 DEG C, then Jing heat exchangers again, after cooling, enter cloth bag separator, collect zinc oxide into
Product, reclaim and produce for zinc oxide, and the water outlet of High-rate sedimentation separator enters manganese salt High-rate sedimentation separator;
3) recycling of manganese:In the manganese salt High-rate sedimentation separator, coagulation area add 15mg/L PAC, 30%
PH is adjusted to 8 by NaOH 1mg/L, subsequently into flocculation zone, adds the PAM of 1.0mg/L, and the water outlet Jing after flocculation flows into heavy
Shallow lake area, by manganese salt precipitate and separate out, Jing sludge pumps send into plate and frame filter press, after thickening, reclaim and produce for manganese, manganese salt
The water outlet of High-rate sedimentation separator enters sulfate High-rate sedimentation separator;
4) removal of sulfate:Milk of lime 220mg/L is added in sulfate High-rate sedimentation separator, pH value is adjusted to
10.4, and the PAM of the PAC and 1.0mg/L of 15mg/L is added, sulfate flocculation is settled out, Jing sludge pumps send into plate and frame filter press,
After thickening, gypsum outward transport is processed, and supernatant enters discharge bay, up to standard to enter municipal sewage plant.
The water analysis data in 4 different disposal stage of the present embodiment are as shown in table 4.
The water quality data in 4 different disposal stage of table
Protection scope of the present invention is not limited solely to above-described embodiment, as long as technique produces waste water with Graphene of the present invention
Processing method, technique are identical, just fall in the scope of protection of the invention.