CN114409170A - Water-oil ammonia-sulfur residue separation system and method for phenol-ammonia wastewater treatment - Google Patents
Water-oil ammonia-sulfur residue separation system and method for phenol-ammonia wastewater treatment Download PDFInfo
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- CN114409170A CN114409170A CN202210111836.3A CN202210111836A CN114409170A CN 114409170 A CN114409170 A CN 114409170A CN 202210111836 A CN202210111836 A CN 202210111836A CN 114409170 A CN114409170 A CN 114409170A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/34—Organic compounds containing oxygen
- C02F2101/345—Phenols
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
- C02F2103/36—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32 from the manufacture of organic compounds
- C02F2103/365—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32 from the manufacture of organic compounds from petrochemical industry (e.g. refineries)
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Abstract
The utility model provides a water-oil ammonia-sulfur residue separation system and a water-oil ammonia-sulfur residue separation method for phenol-ammonia wastewater treatment. The phenol-ammonia wastewater treatment method is based on the phenol-ammonia wastewater treatment system. According to the utility model, based on different physical characteristics of substances such as water, oil, ammonia, sulfur and the like in the wastewater, the phenol-ammonia wastewater is gasified and separated at high temperature by heating the mother liquor separation tank, the gaseous substance collection unit recovers gaseous substances, the water-oil-ammonia-sulfur separation unit separates water oil and ammonia sulfur, the water oil enters the water-oil separation unit to recover light oil, and the ammonia sulfur enters the power plant boiler to participate in the combustion of the power plant boiler, so that the water, oil, ammonia, sulfur and slag are completely recovered in a quality-divided manner.
Description
Technical Field
The utility model relates to the field of wastewater treatment, in particular to a water-oil ammonia-sulfur residue separation system and method for phenol-ammonia wastewater treatment.
Background
The coal pyrolysis process generates a large amount of phenol-ammonia wastewater, and the phenol-ammonia wastewater has the characteristics of complex components, high pollutant concentration, high chromaticity, high toxicity, stable property and the like, and belongs to one of industrial wastewater difficult to treat.
The oil content of the phenol-ammonia wastewater reaches 3500mg/L, the volatile phenol content reaches 5000mg/L, and the ammonia nitrogen content reaches 5500 mg/L. Compared with coking wastewater, the phenol-ammonia wastewater has similar pollutant types but the concentration is about 10 times higher than that of the coking wastewater, so the phenol-ammonia wastewater has extremely high treatment cost, and no mature wastewater treatment process exists at present.
Meanwhile, when the pulverized coal, the seed coal and the lump coal are comprehensively pyrolyzed, the coke powder is easy to bring coal gas in the pyrolysis process, and the coal gas brings the coke residues into the water-oil separation unit in the ammonia water washing process of the bridge pipe and the gas collecting groove, so that the coke residues of the water-oil separation unit are deposited, the cleaning times of the water-oil separation unit are increased, and the yield and the quality of the tar are influenced.
Aiming at the characteristics of high oil content, high phenol content, high ammonia content and the like of the coal pyrolysis phenol-ammonia wastewater, how to realize wastewater treatment and zero emission becomes a technical problem to be solved urgently by technical personnel in the field.
Disclosure of Invention
The utility model aims to provide a water-oil ammonia-sulfur residue separation system and a water-oil ammonia-sulfur residue separation method for phenol-ammonia wastewater treatment. The utility model is also suitable for treating the wastewater with high content of harmful substances such as similar organic matters, ammonia nitrogen and the like.
The technical scheme for realizing the purpose of the utility model is as follows:
in a first aspect, a water-oil ammonia-sulfur residue separation system for phenol-ammonia wastewater treatment is provided, which comprises:
the system comprises a mother liquid separation tank, a closed drying bed and a drying bed, wherein phenol-ammonia wastewater flows in the mother liquid separation tank, after gaseous substances are evaporated from the phenol-ammonia wastewater in the mother liquid separation tank, coke powder is deposited at the bottom of the mother liquid separation tank, and the gaseous substances comprise gaseous water, oil, ammonia and sulfur;
a gaseous substance collection unit which is communicated with the mother liquor separation tank and recovers the gaseous substance;
the water-oil ammonia-sulfur separation unit is communicated with the gaseous substance collection unit and separates the gaseous substance into water oil and ammonia sulfur;
the water-oil separation unit is communicated with the water-oil ammonia-sulfur separation unit, and water and oil separated from the water-oil ammonia-sulfur separation unit enter the water-oil separation unit;
and the ammonia sulfur treatment unit is communicated with the water-oil ammonia sulfur separation unit, and the ammonia sulfur separated from the water-oil ammonia sulfur separation unit enters the ammonia sulfur treatment unit.
Based on the first aspect, in a possible implementation manner, the mother liquor separation tank evaporates the gaseous substances through waste heat of a drying bed; the mother liquid separation tank is arranged on the drying bed;
the temperature of the waste heat of the drying bed is 150-300 ℃.
Based on the first aspect, in a possible implementation manner, a plurality of mother liquor separation tanks are installed on a drying bed, and adjacent mother liquor separation tanks are communicated through an overflow pipe.
In a possible implementation manner based on the first aspect, the gaseous material collecting unit is a collecting cover at the end of the drying bed.
Based on the first aspect, in a possible implementation manner, the water-oil ammonia-sulfur separation unit comprises a water-oil condensation module and an ammonia-sulfur recovery module; the water-oil condensation module is communicated with the water-oil separation unit, and the ammonia-sulfur recovery module is communicated with the ammonia-sulfur treatment unit;
the gaseous substance flows through the water-oil condensation module to change water vapor into water and change gaseous oil into liquid oil, and the water and the liquid oil flow into the water-oil separation unit;
and collecting ammonia sulfur in the gaseous substances through an ammonia sulfur recovery module and then feeding the ammonia sulfur into the ammonia sulfur treatment unit.
In a possible implementation manner based on the first aspect, the water and oil are left to stand in the water and oil recovery water-oil tank separated by the water-oil separation unit to recover the light oil.
Based on the first aspect, in a possible implementation manner, the ammonia sulfur treatment unit comprises a power plant boiler, the gaseous ammonia and the gaseous sulfur separated by the ammonia sulfur recovery module of the water-oil ammonia sulfur separation unit are sent to the power plant boiler under negative pressure, and the gaseous ammonia and the gaseous sulfur are used as combustion-supporting air to participate in combustion of the power plant boiler.
Based on the first aspect, in a possible implementation manner, the water-oil separation unit is further communicated with a wastewater advanced treatment unit, wastewater is treated by the wastewater advanced treatment unit and then is stored in a reclaimed water tank, and the reclaimed water tank is connected with the closed quenching tank. And light oil is recovered after the water-oil separation unit is stood, and reclaimed water is obtained after wastewater is treated by the wastewater advanced treatment unit and is completely used for quenching coke.
In a possible implementation manner based on the first aspect, phenol ammonia wastewater flows in the mother liquor separation tank;
the heating unit is used for gasifying and separating the phenol-ammonia wastewater, and the mother liquor separation tank is used for gasifying the phenol-ammonia wastewater into gaseous substances at high temperature;
the gaseous substance collecting unit recovers gaseous substances;
liquid substances except the gaseous substances in the mother liquid separation tank enter the water-oil ammonia-sulfur separation unit, and waste liquid is separated into water and oil in the water-oil ammonia-sulfur separation unit and then enters the water-oil separation unit;
and the wastewater in the water-oil separation unit is injected into the mother liquor separation tank again.
Based on the first aspect, in a possible implementation manner, the water-oil ammonia-sulfur separation unit includes an ammonia-sulfur separation module, the ammonia-sulfur separation module is communicated with the gaseous substance collection unit, and the ammonia-sulfur separation module separates ammonia and sulfur in the gaseous substance.
Based on the first aspect, in one possible implementation manner, the ammonia sulfur treatment unit includes:
a separator through which the gaseous substances are separated into steam and gaseous ammonia sulfur;
and the power plant boiler is fed with gaseous ammonia sulfur under negative pressure, and the gaseous ammonia sulfur is used as combustion-supporting air to participate in boiler combustion.
Based on the first aspect, in a possible implementation manner, the method further includes:
and the denitration unit is connected with the power plant boiler, and ammonia in the gaseous ammonia sulfur passes through the denitration unit for denitration under the high-temperature condition of the power plant boiler.
Based on the first aspect, in a possible implementation manner, the method further includes:
and the desulfurization system is connected with the power plant boiler, and sulfur in the gaseous ammonia sulfur is combusted to become sulfide and then enters the desulfurization system along with the flue gas to be recovered to prepare ammonium sulfate.
In a second aspect, a method for separating water-oil ammonia sulfur residues in phenol-ammonia wastewater treatment is provided, which comprises the following steps:
evaporating gaseous substances from phenol ammonia wastewater in a mother liquor separation tank, wherein the gaseous substances comprise gaseous water, oil, ammonia and sulfur; coke powder is deposited at the bottom of the mother liquor separation tank;
step two, recovering the gaseous substance by a gaseous substance collecting unit;
thirdly, separating the gaseous substances into water oil and ammonia sulfur by a water oil ammonia sulfur separation unit;
step four, the water and the oil separated from the water-oil ammonia-sulfur separation unit enter a water-oil separation unit for further treatment;
and step five, the ammonia sulfur separated from the water-oil ammonia sulfur separation unit enters an ammonia sulfur treatment unit for further treatment.
Based on the second aspect, in a possible implementation manner, the phenol-ammonia wastewater evaporates gaseous substances in a mother liquor separation tank, and the method comprises the following steps:
the mother liquor separation tank evaporates the gaseous substance through the waste heat of the drying bed;
the mother liquid separation tank is arranged on the drying bed;
the temperature of the waste heat of the drying bed is 150-300 ℃.
Based on the second aspect, in a possible implementation manner, the mother liquor separation tank is installed in a drying bed, and includes:
a plurality of mother liquor separation tanks are arranged on the drying bed, and adjacent mother liquor separation tanks are communicated through overflow pipes;
and phenol-ammonia wastewater is injected into a first mother liquor separation tank from a first burner at the upper end of the drying bed, and the middle mother liquor separation tank is connected through an overflow pipe until the bottom mother liquor separation tank is reached.
Based on the second aspect, in one possible implementation manner, the gaseous substance includes gaseous water, oil, ammonia, sulfur, and includes:
the gaseous substances comprise water vapor, gaseous oil, gaseous sulfide and gaseous ammonia;
the gaseous material collecting unit recovers the gaseous material, including:
heating phenol-ammonia wastewater in the mother liquor separation tank by waste heat of the drying bed;
gaseous oil, gaseous ammonia and gaseous sulfur dissociated from the mother liquor separation tank are continuously brought into the gaseous substance collection unit by steam;
and the steam and the gaseous oil are condensed and cooled by the water-oil ammonia-sulfur separation unit, and the gaseous ammonia and the gaseous sulfur enter an ammonia-sulfur treatment unit.
Based on the second aspect, in a possible implementation manner, the water-oil separated from the water-oil ammonia-sulfur separation unit enters the water-oil separation unit for further processing, and the processing includes:
the water and oil enter a settling cavity of the water-oil separation unit, and the oil floats on the water-oil separation unit by utilizing the density difference principle to carry out primary water-oil separation;
the water and oil after the primary water-oil separation flows into the oil-water separation cavity of the water-oil separation unit, and the oil scraping mechanism in the oil-water separation cavity scrapes floating oil to the oil collecting mechanism.
Compared with the prior art, the utility model has the beneficial effects that:
the mother liquid separation tank is suitable for separating water, oil, ammonia and sulfur residues, the mother liquid separation tank utilizes waste heat of a closed drying bed to heat so that phenol ammonia wastewater is gasified and separated at high temperature, gaseous substances are recovered by a gaseous substance collection unit, water and oil separated by the water, oil, ammonia and sulfur separation unit enter a water oil separation unit to stand for recovering light oil, ammonia and sulfur separated by the water, oil, ammonia and sulfur separation unit enter a power plant boiler, the gaseous ammonia and sulfur are used as combustion-supporting air to participate in the combustion of the power plant boiler, and finally, the water, oil, ammonia, sulfur and residues are thoroughly recovered in a quality-separated manner.
Drawings
FIG. 1 is a first schematic block diagram of a water-oil ammonia-sulfur residue separation system for phenol-ammonia wastewater treatment provided by the utility model;
FIG. 2 is a schematic block diagram of a water-oil ammonia-sulfur residue separation system for phenol-ammonia wastewater treatment provided by the utility model;
FIG. 3 is a schematic view of a mother liquor separation tank mounted in a drying bed;
FIG. 4 is a cross-sectional view A-A of FIG. 3;
FIG. 5 is a third schematic block diagram of a water-oil ammonia-sulfur residue separation system for phenol-ammonia wastewater treatment provided by the utility model;
in the figure, 100-mother liquor separation tank; 110-an overflow port; 200-an overflow pipe; 300-a water injection pipe; 400-underground sewage pipes; 500-a gaseous material collection unit; 600-a fuel conduit; 610-an air duct; 620-gas line; 700-a burner; 800-drying the bed; 810-drying the upper rail of the bed; 820-drying the lower rail of the bed.
Detailed Description
The present invention is described in detail with reference to the embodiments shown in the drawings, but it should be understood that these embodiments are not intended to limit the present invention, and those skilled in the art should understand that functional, methodological, or structural equivalents or substitutions made by these embodiments are within the scope of the present invention.
The embodiment of the utility model provides a phenol-ammonia wastewater treatment system, which comprises a mother liquor separation tank, a gaseous substance collection unit, a water-oil-ammonia-sulfur separation unit, a water-oil-separation unit and an ammonia-sulfur treatment unit, wherein the mother liquor separation tank is arranged in a closed drying bed, phenol-ammonia wastewater flows in the mother liquor separation tank, after gaseous substances are evaporated from the phenol-ammonia wastewater in the mother liquor separation tank, coke powder is deposited at the bottom of the mother liquor separation tank, and the gaseous substances comprise gaseous water, oil, ammonia and sulfur; the gaseous substance collecting unit is communicated with the mother liquor separating tank and recovers gaseous substances; the water-oil ammonia-sulfur separation unit is communicated with the gaseous substance collection unit and separates the gaseous substance into water oil and ammonia sulfur; the water-oil separation unit is communicated with the water-oil ammonia-sulfur separation unit, and water and oil separated from the water-oil ammonia-sulfur separation unit enter the water-oil separation unit; the ammonia sulfur treatment unit is communicated with the water-oil ammonia sulfur separation unit, and the ammonia sulfur separated from the water-oil ammonia sulfur separation unit enters the ammonia sulfur treatment unit.
In the embodiment of the utility model, the mother liquor separation tank is preferably arranged on the drying bed through evaporating the gaseous mother liquor separation tank by the waste heat of the drying bed; the temperature of the waste heat of the drying bed is 150-300 ℃. A plurality of mother liquor separation tanks are arranged on the drying bed, and adjacent mother liquor separation tanks are communicated through overflow pipes. Further, the gaseous material collecting unit of the embodiment of the utility model is a collecting cover at the tail end of the drying bed.
In the embodiment of the utility model, an upper layer and a lower layer of mother liquor separation tanks are preferably arranged on the closed drying bed. Referring to fig. 3, an upper mother liquor separation tank and a lower mother liquor separation tank are installed on a drying bed according to an embodiment of the present invention, and a lower portion of each lower mother liquor separation tank corresponds to a burner of the drying bed 800.
The adjacent mother liquor separating tank of lower floor communicates each other, and phenol ammonia waste water pours into from the first mother liquor separating tank of lower floor, and the middle mother liquor separating tank of lower floor passes through the overflow pipe and connects until the lower extreme mother liquor separating tank of lower floor. The lower layer mother liquid separating tank is a distillation section of the phenol-ammonia wastewater, the temperature of the lower layer mother liquid separating tank is 150-300 ℃, and the phenol-ammonia wastewater is quickly evaporated in the lower layer mother liquid separating tank.
The adjacent mother liquor separating tank in upper strata communicates each other, and deoiling waste water pours into from the first mother liquor separating tank in upper strata, and the middle mother liquor separating tank on upper strata passes through the overflow pipe to be connected, and the top mother liquor separating tank up to the upper strata. The upper layer mother liquid separating tank is a rectification section of the phenol ammonia wastewater, and the temperature of the upper layer mother liquid separating tank is 80-150 ℃.
Gaseous substances evaporated by the upper-layer mother liquor separation tank and the lower-layer mother liquor separation tank are recovered by the gaseous substance collecting unit, the gaseous substances are separated into water oil and ammonia sulfur by the water-oil-ammonia-sulfur separation unit, the water oil enters the water-oil separation unit to be separated into wastewater and oil, a part of wastewater enters the upper-layer adjacent mother liquor separation tank again for rectification, and the other part of wastewater enters the wastewater deep treatment unit. In the wastewater advanced treatment unit of the embodiment of the utility model, the phenol and the oil are removed through the adsorption tower, and the wastewater after oil removal is subjected to biochemical treatment.
Referring to fig. 3 and 4, a plurality of mother liquid separation tanks 100 are installed on the drying bed according to the embodiment of the present invention, a lower portion of each mother liquid separation tank 100 corresponds to one burner 700 of the drying bed 800, and the drying bed 800 is a closed drying bed 800; the 1 st mother liquor separation tank 100 to the last mother liquor separation tank 100 are distributed in sequence from the upper end to the lower end of the drying bed 800; two adjacent mother liquor separation tanks 100 are communicated through an overflow pipe 200, and the last mother liquor separation tank 100 is also communicated with an underground sewage drainage pipeline 400 through a drainage pipe.
According to the embodiment of the utility model, a mother liquid separation tank 100 is arranged above each burner 700 of the drying bed 800, phenol-ammonia wastewater is injected into the first mother liquid separation tank 100 from the first burner 700 at the upper end of the drying bed 800, and the middle mother liquid separation tank 100 is connected through an overflow pipe 200 until reaching the lowest mother liquid separation tank 100; the liquid level is controlled by the water level through the last mother liquor separation tank 100, and the last mother liquor separation tank 100 is provided with a drainage tube to an underground sewage pipeline 400 to prevent the overflow of overlarge flow.
In practical applications, the mother liquid separation tank 100 according to the embodiment of the present invention preferably has a semicircular tank-shaped structure in cross section. The section of the mother liquid separation tank 100 in the embodiment of the utility model is in a semicircular groove-shaped structure, and the semicircular groove-shaped structure can increase the heating area.
In practical applications, it is preferable that a support is disposed on the drying bed 800 of the embodiment of the present invention at a position corresponding to the mother liquid separation tank 100; the mother liquid separation tank 100 is detachably mounted on the support through a bracket. The support provided by the embodiment of the utility model is convenient for overhauling the mother liquor separation tank 100, can be flexibly installed and removed in practical application, and is preferably arranged between the mother liquor separation tank 100 and the support. In consideration of convenient disassembly, the bracket and the support are preferably detachably connected through the elastic anti-skidding buckles, and can also be directly welded on the side plate of the drying bed, so that the dry burning section is avoided at the joint.
Furthermore, the water-oil ammonia-sulfur separation unit provided by the embodiment of the utility model comprises a water-oil condensation module and an ammonia-sulfur recovery module; the water-oil condensation module is communicated with the water-oil separation unit, and the ammonia-sulfur recovery module is communicated with the ammonia-sulfur treatment unit; the gaseous substance flows through the water-oil condensation module to change water vapor into water and change the gaseous oil into liquid oil, and the water and the liquid oil flow into the water-oil separation unit; the gaseous substance flows through the ammonia-sulfur recovery module to change the gaseous ammonia into liquid ammonia and change the gaseous sulfur into liquid sulfur, and the liquid ammonia and the liquid sulfur flow into the ammonia-sulfur treatment unit.
The water and oil separated in the water-oil separation unit and the oil recovery ammonia water tank of the embodiment of the utility model stand to recover light oil; the ammonia water tank is communicated with the mother liquor separation tank, and the wastewater in the ammonia water tank is injected into the mother liquor separation tank again.
The ammonia-sulfur treatment unit comprises a power plant boiler, and gaseous ammonia and gaseous sulfur separated by an ammonia-sulfur recovery module of the water-oil ammonia-sulfur separation unit are delivered to the power plant boiler under negative pressure, and the gaseous ammonia and the gaseous sulfur are used as combustion-supporting air to participate in the combustion of the power plant boiler. With continued reference to fig. 1, the water-oil separation unit according to the embodiment of the present invention is further connected to a wastewater advanced treatment unit, the wastewater is treated by the wastewater advanced treatment unit and then stored in a reclaimed water tank, and the reclaimed water tank is connected to the closed coke quenching tank. The light oil is recovered after the water-oil separation unit is kept stand, and the reclaimed water is completely used for coke quenching after the wastewater is treated by the wastewater advanced treatment unit.
In the embodiment of the utility model, phenol-ammonia wastewater flows in the mother liquor separation tank; the high temperature of the mother liquid separation tank leads the phenol ammonia wastewater to be gasified into gaseous substances at high temperature; the gaseous substance collecting unit recovers gaseous substances; liquid substances except the gaseous substances in the mother liquid separation tank enter the water-oil ammonia-sulfur separation unit, and waste liquid is separated into water and oil in the water-oil ammonia-sulfur separation unit and then enters the water-oil separation unit; and injecting the wastewater in the water-oil separation unit into the mother liquor separation tank again.
The water-oil ammonia-sulfur separation unit comprises an ammonia-sulfur separation module, the ammonia-sulfur separation module is communicated with the gaseous substance collection unit, and the ammonia-sulfur separation module separates ammonia and sulfur in the gaseous substance.
In the above scheme, the ammonia sulfur treatment unit of the embodiment of the utility model comprises a separator and a power plant boiler, wherein the gaseous substance is separated into steam and gaseous ammonia sulfur through the separator; and (3) feeding the gaseous ammonia sulfur into the power plant boiler under negative pressure, wherein the gaseous ammonia sulfur is used as combustion-supporting air to participate in boiler combustion.
Based on the above, the ammonia sulfur treatment unit of the embodiment of the utility model further comprises a denitration unit, the denitration unit is connected with the power plant boiler, and ammonia in the gaseous ammonia sulfur is denitrated by the denitration unit under the high-temperature condition of the power plant boiler.
Based on the above, the ammonia sulfur treatment unit according to the embodiment of the present invention further includes: and the desulfurization system is connected with a power plant boiler, and sulfur in the gaseous ammonia sulfur is combusted to become sulfide and then enters the desulfurization system along with the flue gas to be recovered to prepare ammonium sulfate.
In addition, the embodiment of the utility model also provides a phenol ammonia wastewater treatment method, which comprises the following steps:
evaporating gaseous substances from phenol ammonia wastewater in a mother liquor separation tank, wherein the gaseous substances comprise gaseous water, oil, ammonia and sulfur; the coke powder is deposited at the bottom of the mother liquor separation tank;
step two, recovering gaseous substances by a gaseous substance collecting unit;
step three, separating the gaseous substances into water oil and ammonia sulfur by a water oil ammonia sulfur separation unit;
step four, the water and oil separated from the water-oil ammonia-sulfur separation unit enters the water-oil separation unit for further treatment;
and step five, the ammonia sulfur separated from the water-oil ammonia sulfur separation unit enters an ammonia sulfur treatment unit for further treatment.
Gaseous substances are evaporated from the phenol ammonia wastewater in the mother liquor separation tank, and the method comprises the following steps: the mother liquor separation tank evaporates gaseous substances through waste heat of the drying bed; the mother liquid separation tank is arranged on the drying bed; the temperature of the waste heat of the drying bed is 150-300 ℃.
The above-mentioned mother liquor separating tank is installed in stoving bed, includes: a plurality of mother liquor separation tanks are arranged on the drying bed, and adjacent mother liquor separation tanks are communicated through an overflow pipe; phenol ammonia waste water pours into first mother liquor separating tank into from the first burner position of stoving bed upper end, and middle mother liquor separating tank passes through the overflow pipe and connects until lower extreme mother liquor separating tank.
The gaseous substances comprise gaseous water, oil, ammonia and sulfur, and comprise: the gaseous substances comprise water vapor, gaseous oil, gaseous sulfide and gaseous ammonia; the above gaseous substance collecting unit recovers gaseous substances, comprising: heating phenol-ammonia wastewater in the mother liquor separation tank by waste heat of the drying bed; gaseous oil, gaseous ammonia and gaseous sulfur dissociated from the mother liquor separation tank are continuously brought into the gaseous substance collection unit by steam; the steam and the gaseous oil are condensed and cooled by the water-oil ammonia-sulfur separation unit, and the gaseous ammonia and the gaseous sulfur enter the ammonia-sulfur treatment unit.
The water oil separated from the water oil ammonia sulfur separation unit enters the water oil separation unit for further treatment, and the method comprises the following steps: the water and oil enter a precipitation cavity of the water-oil separation unit, and the oil floats on the water-oil separation unit by utilizing the density difference principle to carry out primary water-oil separation; the water and oil after the primary water-oil separation flow into the oil-water separation cavity of the water-oil separation unit, and the oil scraping mechanism in the oil-water separation cavity scrapes floating oil to the oil collecting mechanism.
Referring to fig. 5, a mother liquid separating tank is disposed above each burner of the drying bed according to the embodiment of the present invention, and the mother liquid separating tank has a semicircular groove-shaped structure, so as to increase a heating area. The phenol-ammonia wastewater is injected into a mother liquor separation tank from a first burner at the upper end of the drying bed, and the middle mother liquor separation tank is connected through an overflow pipe until reaching the bottom mother liquor separation tank; the liquid level is controlled by observing the water level condition of the last twelfth mother liquid tank.
The high temperature of the mother liquor separation tank enables phenol-ammonia wastewater to be gasified and separated at high temperature, water vapor is recovered through a collection cover at the tail end of a drying bed, separated water and oil are kept stand by an ammonia water tank through a water-oil separation system to recover light oil, the wastewater in the ammonia water tank is injected into the mother liquor separation tank again, closed cycle separation of the wastewater is realized, and finally, thorough quality-classified recovery of water, oil, ammonia and sulfur is realized. Gaseous ammonia and sulfur are fed into a secondary inlet of a power plant through a secondary fan under negative pressure and are used as combustion-supporting air to participate in boiler combustion, the ammonia reacts with nitric oxide under the high-temperature condition of the boiler to play a role in denitration, and the smoke is discharged up to the standard; the sulfide enters a desulfurization system along with the flue gas after being combusted to recover and prepare ammonium sulfate.
With continuing reference to FIG. 5, in an embodiment of the present invention, the wastewater is further processed by a wastewater advanced treatment system to become recycled water and enter a recycled water tank. The reclaimed water in the reclaimed water tank is used for closed quenching. The closed type coke quenching of the embodiment of the utility model is specifically as follows: after the red hot semi coke is transported to a quenching chamber, the semi coke is sprayed by reclaimed water to extinguish fire. The coke quenching water vapor generated in the coke quenching process enters the water-oil-ammonia-sulfur separation system again.
The system for separating the water, the oil and the ammonia sulfur residues for treating the phenol-ammonia wastewater comprises a mother liquid separation tank, a gaseous substance collection unit, a water-oil ammonia sulfur separation unit, a water-oil separation unit and an ammonia sulfur treatment unit, wherein the phenol-ammonia wastewater flows in the mother liquid separation tank, the gaseous substance collection unit is communicated with the mother liquid separation tank, and the water-oil ammonia sulfur separation unit is communicated with the gaseous substance collection unit, the water-oil separation unit and the ammonia sulfur treatment unit. The phenol-ammonia wastewater treatment method is based on the phenol-ammonia wastewater treatment system. According to the embodiment of the utility model, based on different physical characteristics of substances such as water, oil, ammonia, sulfur and the like in the wastewater, the phenol-ammonia wastewater is gasified and separated at high temperature by heating the mother liquor separation tank, the gaseous substance is recovered by the gaseous substance collection unit, the water-oil-ammonia-sulfur separation unit is used for separating water, oil and ammonia sulfur, the water, oil and ammonia sulfur enter the water-oil separation unit to recover light oil, and the ammonia sulfur enters the power plant boiler to participate in the combustion of the power plant boiler, so that the thorough quality-classified recovery of the water, oil, ammonia, sulfur and slag is finally realized.
The mother liquid separation tank is suitable for separating water, oil, ammonia and sulfur residues, the mother liquid separation tank is heated by using waste heat of a closed drying bed to enable phenol-ammonia wastewater to be gasified and separated at high temperature, gaseous substances are recovered by a gaseous substance collection unit, water and oil separated by the water-oil ammonia-sulfur separation unit enter a water-oil separation unit to stand for recovering light oil, ammonia and sulfur separated by the water-oil ammonia-sulfur separation unit enter a power plant boiler, the gaseous ammonia-sulfur is used as combustion-supporting air to participate in the combustion of the power plant boiler, and finally the water, the oil, the ammonia, the sulfur and the residues are thoroughly recovered in a quality-divided manner.
The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.
It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (10)
1. A water-oil ammonia-sulfur residue separation system for phenol-ammonia wastewater treatment is characterized by comprising:
the system comprises a mother liquid separation tank, a closed drying bed and a drying bed, wherein phenol-ammonia wastewater flows in the mother liquid separation tank, after gaseous substances are evaporated from the phenol-ammonia wastewater in the mother liquid separation tank, coke powder is deposited at the bottom of the mother liquid separation tank, and the gaseous substances comprise gaseous water, oil, ammonia and sulfur;
a gaseous substance collection unit which is communicated with the mother liquor separation tank and recovers the gaseous substance;
the water-oil ammonia-sulfur separation unit is communicated with the gaseous substance collection unit and separates the gaseous substance into water oil and ammonia sulfur;
the water-oil separation unit is communicated with the water-oil ammonia-sulfur separation unit, and water and oil separated from the water-oil ammonia-sulfur separation unit enter the water-oil separation unit;
and the ammonia sulfur treatment unit is communicated with the water-oil ammonia sulfur separation unit, and the ammonia sulfur separated from the water-oil ammonia sulfur removal separation unit enters the ammonia sulfur treatment unit.
2. The water-oil ammonia sulfur slag separation system according to claim 1, wherein the mother liquor separation tank evaporates the gaseous substances by waste heat of a drying bed; the mother liquid separation tank is arranged on the drying bed;
the temperature of the waste heat of the drying bed is 150-300 ℃.
3. The water-oil ammonia sulfur residue separation system as claimed in claim 2, wherein a plurality of mother liquor separation tanks are installed on the drying bed, and adjacent mother liquor separation tanks are communicated through an overflow pipe.
4. The water-oil ammonia sulfur slag separation system of claim 1 wherein the gaseous material collection unit is a collection hood at the end of a dryer bed.
5. The water-oil ammonia sulfur residue separation system of claim 1, wherein the water-oil ammonia sulfur separation unit comprises a water-oil condensation module and an ammonia sulfur recovery module; the water-oil condensation module is communicated with the water-oil separation unit, and the ammonia-sulfur recovery module is communicated with the ammonia-sulfur treatment unit;
the gaseous substance flows through the water-oil condensation module to change water vapor into water and change gaseous oil into liquid oil, and the water and the liquid oil flow into the water-oil separation unit;
and collecting ammonia sulfur in the gaseous substances through an ammonia sulfur recovery module and then feeding the ammonia sulfur into the ammonia sulfur treatment unit.
6. The water-oil ammonia sulfur residue separation system according to claim 1, wherein the water and oil are left to stand in the water-oil recovery water-oil tank separated by the water-oil separation unit to recover light oil.
7. A method for separating water-oil ammonia-sulfur slag in phenol-ammonia wastewater treatment is characterized by comprising the following steps:
evaporating gaseous substances from phenol ammonia wastewater in a mother liquor separation tank, wherein the gaseous substances comprise gaseous water, oil, ammonia and sulfur; coke powder is deposited at the bottom of the mother liquor separation tank;
step two, recovering the gaseous substance by a gaseous substance collecting unit;
thirdly, separating the gaseous substances into water oil and ammonia sulfur by a water oil ammonia sulfur separation unit;
step four, the water and the oil separated from the water-oil ammonia-sulfur separation unit enter a water-oil separation unit for further treatment;
and step five, the ammonia sulfur separated from the water-oil ammonia sulfur separation unit enters an ammonia sulfur treatment unit for further treatment.
8. The water-oil ammonia sulfur residue separation method according to claim 7, wherein the phenol-ammonia wastewater is evaporated with gaseous substances in a mother liquor separation tank, and the method comprises the following steps:
the mother liquor separation tank evaporates the gaseous substance through the waste heat of the drying bed;
the mother liquid separation tank is arranged on the drying bed;
the temperature of the waste heat of the drying bed is 150-300 ℃.
9. The water-oil ammonia sulfur slag separation method according to claim 8, wherein the mother liquid separation tank is installed in a drying bed and comprises:
a plurality of mother liquor separation tanks are arranged on the drying bed, and adjacent mother liquor separation tanks are communicated through overflow pipes;
and phenol-ammonia wastewater is injected into a first mother liquor separation tank from a first burner at the upper end of the drying bed, and the middle mother liquor separation tank is connected through an overflow pipe until the bottom mother liquor separation tank is reached.
10. The water-oil ammonia sulfur slag separation method according to claim 7, wherein the gaseous substance collection unit recovers the gaseous substance, and comprises:
heating phenol-ammonia wastewater in the mother liquor separation tank by waste heat of the drying bed;
gaseous oil, gaseous ammonia and gaseous sulfur dissociated from the mother liquor separation tank are continuously brought into the gaseous substance collection unit by steam;
and the steam and the gaseous oil are condensed and cooled by the water-oil ammonia-sulfur separation unit, and the gaseous ammonia and the gaseous sulfur enter an ammonia-sulfur treatment unit.
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Cited By (1)
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| CN114409170B (en) | 2023-04-07 |
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