CN210825834U - Fatlute pyrolysis effluent disposal system - Google Patents
Fatlute pyrolysis effluent disposal system Download PDFInfo
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- CN210825834U CN210825834U CN201921176101.9U CN201921176101U CN210825834U CN 210825834 U CN210825834 U CN 210825834U CN 201921176101 U CN201921176101 U CN 201921176101U CN 210825834 U CN210825834 U CN 210825834U
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Abstract
The utility model discloses a fatlute pyrolysis effluent disposal system, including pretreatment units, first senior oxidation unit, biochemical unit, the senior oxidation unit of second and advanced treatment unit, pretreatment units, first senior oxidation unit, biochemical unit, the senior oxidation unit of second and advanced treatment unit connect gradually. Aiming at the characteristics of oily wastewater after oil sludge pyrolysis, the oil removal agent is introduced, so that the oil content and COD of the wastewater can be remarkably reduced, better conditions are created for subsequent advanced oxidation and biochemical treatment effects, and meanwhile, the generated oil removal precipitate can be sent to thermal desorption for wastewater generation to be treated, so that oil and the oil removal agent are recovered, the waste oil and the oil removal agent are recycled, and the wastewater treatment operation cost is reduced. By coupling advanced oxidation and biochemical treatment, the advantages of respectively treating organic matters and ammonia nitrogen are exerted, the wastewater treatment can reach the standard efficiently, and the method is economical and efficient.
Description
Technical Field
The utility model relates to a waste water treatment technical field, concretely relates to fatlute pyrolysis effluent disposal system.
Background
The oil sludge is oil-containing solid waste produced in the processes of oil exploration, exploitation, refining, tank cleaning, storage and transportation and oil-containing sewage treatment. The composition is extremely complex, contains not only refractory organics such as benzene series, phenols, anthracene, pyrene and the like, but also a large amount of water treatment agents such as flocculating agents, scale inhibitors, corrosion inhibitors and the like added in the production and processing process, and also contains a large amount of toxic and harmful substances such as pathogenic bacteria, heavy metals, radioactive elements and the like. According to a large number of researches, the oil sludge is difficult to naturally degrade, and if the oil sludge cannot be properly disposed, the oil sludge is discharged randomly, so that the oil sludge causes great harm to the health and the ecological environment of human beings.
The pyrolysis technology has many advantages in the field of oil sludge treatment, can perform harmless treatment on oil sludge, and can separate hydrocarbon substances with a calorific value by heating the oil sludge under an anaerobic condition so as to realize resource recovery of the oil sludge. However, a large amount of oily wastewater which is difficult to treat is also generated in the process of pyrolysis treatment of oil sludge, and the wastewater becomes a bottleneck influencing the popularization of the pyrolysis technology at present.
Therefore, a treatment system for wastewater generated after pyrolysis of oil sludge is urgently needed.
SUMMERY OF THE UTILITY MODEL
The utility model discloses an it is not enough that prior art is overcome to the purpose, provide a fatlute pyrolysis effluent disposal system, to the characteristics of fatlute pyrolysis back oily waste water, through introducing deoiling agent, reduction waste water oil content and COD that can show, create better condition for subsequent advanced oxidation and biochemical treatment effect, the deoiling precipitate that produces simultaneously can be sent to the thermal desorption that produces waste water and is handled, retrieve oil and deoiling agent, reach the recovery reuse of waste oil and deoiling agent, reduce the waste water treatment running cost.
By coupling advanced oxidation and biochemical treatment, the advantages of respectively treating organic matters and ammonia nitrogen are exerted, the wastewater treatment can reach the standard efficiently, and the method is economical and efficient.
The purpose of the utility model is achieved through the following technical measures: the utility model provides an fatlute pyrolysis effluent disposal system, includes pretreatment units, first advanced oxidation unit, biochemical unit, the advanced oxidation unit of second and deep processing unit, pretreatment units's exit end and first advanced oxidation unit are connected, the exit end and the biochemical unit of first advanced oxidation unit are connected, biochemical unit's exit end and the advanced oxidation unit of second are connected, the exit end and the deep processing unit of the advanced oxidation unit of second are connected.
Further, the pretreatment unit comprises an oil separation working section, an oil removal adsorption working section and a precipitation working section, wherein the oil separation working section, the oil removal adsorption working section and the precipitation working section are connected in sequence.
Further, the degreasing agent used in the degreasing adsorption section is prepared by reacting montmorillonite, aluminum oxide, silicon dioxide, calcium oxide, manganese oxide, magnesium oxide and titanium oxide under an acidic condition, the pH value of a water sample is controlled to be 4-5.5 in the degreasing adsorption section, and the adsorption time is more than or equal to 1 h.
Further, the advanced oxidation unit 1 adopts a Fenton oxidation process, and the mass ratio of the added amount of hydrogen peroxide to the COD of the wastewater is 1: 1-1: 10; the molar ratio of hydrogen peroxide to ferrous ions is 2: 1-9: 1; the reaction is kept for 2-3h, and one or two of calcium oxide and calcium hydroxide are adopted for pH adjustment after the reaction.
Further, the biochemical unit adopts an A/O process in an activated sludge method.
Further, the second advanced oxidation unit adopts ozone oxidation or Fenton oxidation.
Further, the second advanced oxidation unit adopts ozone oxidation, and the ozone gas source adopts any one of an air source and an oxygen source.
Further, the ozone oxidation adopts a tower structure, the height-diameter ratio is 2-5, the ozone tower is divided into three areas from bottom to top, the bottom is a primary reaction area, the middle is an enhanced reaction area, and the upper part is an ozone depletion area.
Furthermore, the ozone-enhanced reaction zone is provided with an ultraviolet lamp tube.
Furthermore, the advanced treatment unit adopts a circular tower type biological aerated filter.
Furthermore, the filler layer of the biological aerated filter is divided into a supporting layer and a filter material layer, the supporting layer of the biological aerated filter is divided into three layers from bottom to top, the bottom layer is cobblestones with the thickness of 16-32mm, and the height of the filler layer is 0.1-0.2 m; zeolite is laid on the upper layer of the bottom layer of the support layer of the biological aerated filter, the grain diameter is 10-15mm, and the height of the filler layer is 0.15-0.2 m; fine broken stones are laid on the zeolite upper layer of the support layer of the biological aerated filter, the particle size is 5-10mm, and the height of the filler layer is 0.05-0.1 m; the filter material layer is laid on the upper layer of the aerated biological filter filling fine crushed stone, the material is one or two of ceramsite and activated carbon, the particle size is 3-6mm, and the height of the filler layer is 2-4 m.
Furthermore, the height of the upper layer clear water area of the packing layer of the biological aerated filter is 1-1.2 m.
Compared with the prior art, the beneficial effects of the utility model are that: aiming at the characteristics of oily wastewater after oil sludge pyrolysis, by introducing the deoiling agent, the oil content and COD of the wastewater can be obviously reduced, better conditions are created for subsequent advanced oxidation and biochemical treatment effects, and meanwhile, the generated deoiling precipitate can be sent to thermal desorption of generated wastewater for treatment, so that an oil product and the deoiling agent are recovered, the waste oil and the deoiling agent are recycled, and the wastewater treatment operation cost is reduced. By coupling advanced oxidation and biochemical treatment, the advantages of respectively treating organic matters and ammonia nitrogen are exerted, the wastewater treatment can reach the standard efficiently, and the method is economical and efficient.
The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
Drawings
Fig. 1 is a schematic structural diagram of a sludge pyrolysis wastewater treatment system.
The device comprises a pretreatment unit 1, a first advanced oxidation unit 2, a biochemical unit 3, a second advanced oxidation unit 4 and a deep treatment unit 5.
Detailed Description
In an embodiment, as shown in fig. 1, a sludge pyrolysis wastewater treatment system comprises a pretreatment unit 1, a first advanced oxidation unit 2, a biochemical unit 3, a second advanced oxidation unit 4 and a depth treatment unit 5, wherein an outlet end of the pretreatment unit 1 is connected with the first advanced oxidation unit 2, an outlet end of the first advanced oxidation unit 2 is connected with the biochemical unit 3, an outlet end of the biochemical unit 3 is connected with the second advanced oxidation unit 4, and an outlet end of the second advanced oxidation unit 4 is connected with the depth treatment unit 5.
The pretreatment unit 1 comprises an oil separation working section, an oil removal adsorption working section and a precipitation working section, wherein the oil separation working section, the oil removal adsorption working section and the precipitation working section are sequentially connected.
The advanced oxidation unit 1 adopts a Fenton oxidation process, and the mass ratio of the added amount of hydrogen peroxide to the COD of the wastewater is 1: 1-1: 10; the molar ratio of hydrogen peroxide to ferrous ions is 2: 1-9: 1; the reaction is kept for 2-3h, and one or two of calcium oxide and calcium hydroxide are adopted for pH adjustment after the reaction.
The biochemical unit 3 adopts an A/O process in an activated sludge method.
The second advanced oxidation unit 4 adopts ozone oxidation or Fenton oxidation.
The second advanced oxidation unit 4 adopts ozone oxidation, and the ozone gas source adopts any one of an air source and an oxygen source.
The ozone oxidation adopts a tower structure, the height-diameter ratio is 2-5, the ozone tower is divided into three areas from bottom to top, the bottom is a primary reaction area, the middle is an enhanced reaction area, and the upper part is an ozone depletion area.
The ozone-enhanced reaction zone is provided with an ultraviolet lamp tube.
The advanced treatment unit 5 adopts a circular tower type biological aerated filter.
The biological aerated filter packing layer is divided into a supporting layer and a filter material layer, the supporting layer of the biological aerated filter is divided into three layers from bottom to top, the bottom layer is cobblestones with the thickness of 16-32mm, and the height of the packing layer is 0.1-0.2 m; zeolite is laid on the upper layer of the bottom layer of the support layer of the biological aerated filter, the grain diameter is 10-15mm, and the height of the filler layer is 0.15-0.2 m; fine broken stones are laid on the zeolite upper layer of the support layer of the biological aerated filter, the particle size is 5-10mm, and the height of the filler layer is 0.05-0.1 m; the filter material layer is laid on the upper layer of the aerated biological filter filling fine crushed stone, the material is one or two of ceramsite and activated carbon, the particle size is 3-6mm, and the height of the filler layer is 2-4 m.
The height of the upper clear water area of the packing layer of the biological aerated filter is 1-1.2 m.
The degreasing agent used in the degreasing adsorption section is prepared by reacting montmorillonite, aluminum oxide, silicon dioxide, calcium oxide, manganese oxide, magnesium oxide and titanium oxide under an acidic condition, the pH value of a water sample is controlled to be 4-5.5 in the degreasing adsorption section, and the adsorption time is more than or equal to 1 h.
The pyrolysis process is adopted in a certain oil sludge dangerous waste treatment project, and the raw water volume of the produced waste water is 5m3The treatment system and the treatment method are utilized to treat the wastewater to reach the environmental evaluation treatment standard, and the treatment process comprises the following steps:
example 1
Oily wastewater firstly enters a pretreatment unit 1, self-made degreasing agent is adopted for degreasing, the dosage of the degreasing agent is 5 kg/ton of water, the adsorption time is controlled for 1h, and the adsorption pH is 4; and (3) enabling the supernatant after the adsorption and flocculation to enter a first advanced oxidation unit 2 for Fenton reaction, wherein the mass ratio of the added amount of hydrogen peroxide to the COD of the wastewater is 1: 5; the molar ratio of hydrogen peroxide to ferrous ions is 6: 1; the reaction is kept for 2 hours, the pH after the reaction is adjusted to be 7 by calcium oxide, the flocculation is carried out, the flocculated supernatant enters the biochemical treatment process, the A/O process is adopted for the biochemical treatment process, organic matters contained in the effluent of the sludge sedimentation tank are organic matters which are difficult to be biochemically degraded, and the strong oxidation reaction of the second advanced oxidation unit 4 is carried out to completely remove part of the organic matters and break bonds and chains of the rest organic matters so as to be beneficial to the subsequent advanced treatment of the aeration biological filter. The biochemical effluent enters an ozone oxidation tower from the bottom, and the effluent from the top of the ozone tower enters an advanced treatment unit 5. The aeration biological filter of the advanced treatment unit 5 is used for carrying out advanced treatment on organic matters and ammonia nitrogen. The biological aerated filter packing layer comprises a cobble layer 0.1m, a zeolite layer 0.15m, a fine gravel layer 0.1m, a ceramsite layer 4m and a clear water zone 1m in sequence from the bottom layer to the upper layer. Through the treatment of the whole process system, the indexes of COD, ammonia nitrogen, ss, total oil and the like in the waste water finally reach the requirements of the project environmental evaluation standard.
Example 2
Oily wastewater firstly enters a pretreatment unit 1, self-made degreasing agent is adopted for degreasing, the dosage of the degreasing agent is 5 kg/ton of water, the adsorption time is controlled for 1.2h, and the adsorption pH is 4.5; and (3) enabling the supernatant after the adsorption and flocculation to enter a first advanced oxidation unit 2 for Fenton reaction, wherein the mass ratio of the added amount of hydrogen peroxide to the COD of the wastewater is 1: 2; the molar ratio of hydrogen peroxide to ferrous ions is 2: 1; the reaction is kept for 2.5 hours, calcium hydroxide is adopted for pH adjustment after the reaction, flocculation is carried out after the pH is adjusted to 7, the flocculated supernatant enters biochemistry, an A/O process is adopted for biochemistry, organic matters contained in the effluent of the sludge sedimentation tank are organic matters which are difficult to biochemically degrade, and through strong oxidation reaction of the second advanced oxidation unit 4, partial organic matters are completely removed, and simultaneously, the bonds and chains of the residual organic matters are broken, so that the subsequent advanced treatment of the aeration biological filter tank is facilitated. The biochemical effluent enters an ozone oxidation tower from the bottom, and the effluent from the top of the ozone tower enters an advanced treatment unit 5. The biological aerated filter of the advanced treatment unit 5 is used for carrying out advanced treatment on the sexual organic matters and ammonia nitrogen. The biological aerated filter packing layer comprises a cobble layer 0.2m, a zeolite layer 0.18m, a fine gravel layer 0.08m, a ceramsite layer 3.5m and a clear water zone 1.1m from the bottom layer to the upper layer in sequence. Through the treatment of the whole process system, the indexes of COD, ammonia nitrogen, ss, total oil and the like in the waste water finally reach the requirements of the project environmental evaluation standard.
Example 3
Oily wastewater firstly enters a pretreatment unit 1, self-made degreasing agent is adopted for degreasing, the dosage of the degreasing agent is 5 kg/ton of water, the adsorption time is controlled for 1.5h, and the adsorption pH is 5.5; and (3) enabling the supernatant after the adsorption and flocculation to enter a first advanced oxidation unit 2 for Fenton reaction, wherein the mass ratio of the added amount of hydrogen peroxide to the COD of the wastewater is 1: 9; the molar ratio of hydrogen peroxide to ferrous ions is 9: 1; the reaction is kept for 3 hours, the pH after the reaction is adjusted to be 7 by calcium oxide, the flocculation is carried out, the flocculated supernatant enters the biochemical treatment, the A/O process is adopted for the biochemical treatment, the organic matters contained in the effluent of the sludge sedimentation tank are organic matters which are difficult to be biochemically degraded, and the strong oxidation reaction of the second advanced oxidation unit 4 is adopted to completely remove part of the organic matters and break bonds and chains of the rest organic matters, so that the subsequent advanced treatment of the aeration biological filter tank is facilitated. The biochemical effluent enters an ozone oxidation tower from the bottom, and the effluent from the top of the ozone tower enters an advanced treatment unit 5. The biological aerated filter of the advanced treatment unit 5 is used for carrying out advanced treatment on the sexual organic matters and ammonia nitrogen. The biological aerated filter packing layer comprises a cobble layer 0.2m, a zeolite layer 0.2m, a fine gravel layer 0.1m, a ceramsite layer 3m and a clear water zone 1.2m from the bottom layer to the upper layer in sequence. Through the treatment of the whole process system, the indexes of COD, ammonia nitrogen, ss, total oil and the like in the waste water finally reach the requirements of the project environmental evaluation standard. Experimental data of oil removal adsorption section of pretreatment unit 1
TABLE 1 oil and COD removal effect of the pretreatment unit oil removal adsorption section
| Sampling point | Oil content (mg/L) | COD(mg/L) |
| Oil removal adsorption section water inlet | 1300 | 12500 |
| Effluent of oil removal adsorption section | 159 | 6600 |
| Oil removal adsorption section water inlet | 1155 | 11600 |
| Effluent of oil removal adsorption section | 174 | 6300 |
Experimental data of section of advanced treatment unit 5
TABLE 2 COD removal effect of advanced treatment unit on organic substances
It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (12)
1. The utility model provides an oil sludge pyrolysis wastewater treatment system which characterized in that: including the preprocessing unit, first advanced oxidation unit, biochemical unit, second advanced oxidation unit and advanced treatment unit, the exit end and the first advanced oxidation unit of preprocessing unit are connected, the exit end and the biochemical unit of first advanced oxidation unit are connected, the exit end and the second advanced oxidation unit of biochemical unit are connected, the exit end and the advanced treatment unit of second advanced oxidation unit are connected.
2. The sludge pyrolysis wastewater treatment system according to claim 1, wherein: the pretreatment unit comprises an oil separation working section, an oil removal adsorption working section and a precipitation working section, wherein the oil separation working section, the oil removal adsorption working section and the precipitation working section are sequentially connected.
3. The sludge pyrolysis wastewater treatment system according to claim 2, wherein: the degreasing agent used in the degreasing adsorption section is prepared by reacting montmorillonite, aluminum oxide, silicon dioxide, calcium oxide, manganese oxide, magnesium oxide and titanium oxide under an acidic condition, the pH value of a water sample is controlled to be 4-5.5 in the degreasing adsorption section, and the adsorption time is more than or equal to 1 h.
4. The sludge pyrolysis wastewater treatment system according to claim 1, wherein: the advanced oxidation unit 1 adopts a Fenton oxidation process, and the mass ratio of the added amount of hydrogen peroxide to the COD of the wastewater is 1: 1-1: 10; the molar ratio of hydrogen peroxide to ferrous ions is 2: 1-9: 1; the reaction is kept for 2-3h, and one or two of calcium oxide and calcium hydroxide are adopted for pH adjustment after the reaction.
5. The sludge pyrolysis wastewater treatment system according to claim 1, wherein: the biochemical unit adopts an A/O process in an activated sludge method.
6. The sludge pyrolysis wastewater treatment system according to claim 1, wherein: the second advanced oxidation unit adopts ozone oxidation or Fenton oxidation.
7. The sludge pyrolysis wastewater treatment system of claim 6, wherein: the second advanced oxidation unit adopts ozone oxidation, and the ozone gas source adopts any one of an air source and an oxygen source.
8. The sludge pyrolysis wastewater treatment system of claim 6, wherein: the ozone oxidation adopts a tower structure, the height-diameter ratio is 2-5, the ozone tower is divided into three areas from bottom to top, the bottom is a primary reaction area, the middle is an enhanced reaction area, and the upper part is an ozone depletion area.
9. The sludge pyrolysis wastewater treatment system of claim 8, wherein: the ozone-enhanced reaction zone is provided with an ultraviolet lamp tube.
10. The sludge pyrolysis wastewater treatment system according to claim 1, wherein: the advanced treatment unit adopts a circular tower type biological aerated filter.
11. The sludge pyrolysis wastewater treatment system of claim 10, wherein: the biological aerated filter packing layer is divided into a supporting layer and a filter material layer, the supporting layer of the biological aerated filter is divided into three layers from bottom to top, the bottom layer is cobblestones with the thickness of 16-32mm, and the height of the packing layer is 0.1-0.2 m; zeolite is laid on the upper layer of the bottom layer of the support layer of the biological aerated filter, the grain diameter is 10-15mm, and the height of the filler layer is 0.15-0.2 m; fine broken stones are laid on the zeolite upper layer of the support layer of the biological aerated filter, the particle size is 5-10mm, and the height of the filler layer is 0.05-0.1 m; the filter material layer is laid on the upper layer of the aerated biological filter filling fine crushed stone, the material is one or two of ceramsite and activated carbon, the particle size is 3-6mm, and the height of the filler layer is 2-4 m.
12. The sludge pyrolysis wastewater treatment system of claim 11, wherein: the height of the upper clear water area of the packing layer of the biological aerated filter is 1-1.2 m.
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| CN110330187A (en) * | 2019-07-24 | 2019-10-15 | 杰瑞环境工程技术有限公司 | A kind of greasy filth pyrolysis waste water treatment system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110330187A (en) * | 2019-07-24 | 2019-10-15 | 杰瑞环境工程技术有限公司 | A kind of greasy filth pyrolysis waste water treatment system |
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