CN113087290A - Sulfur-containing sewage treatment system and treatment process thereof - Google Patents

Sulfur-containing sewage treatment system and treatment process thereof Download PDF

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Publication number
CN113087290A
CN113087290A CN202110330689.4A CN202110330689A CN113087290A CN 113087290 A CN113087290 A CN 113087290A CN 202110330689 A CN202110330689 A CN 202110330689A CN 113087290 A CN113087290 A CN 113087290A
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sewage
wastewater
water
sulfur
treatment
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张太亮
李朝晖
周家斌
郑存川
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Southwest Petroleum University
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Southwest Petroleum University
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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
    • C02F9/00—Multistage treatment of water, waste water or sewage
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
    • C02F11/122—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
    • C02F11/125—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using screw filters
    • 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
    • C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
    • 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
    • C02F1/24—Treatment of water, waste water, or sewage by flotation
    • 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
    • C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
    • 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
    • C02F1/72—Treatment of water, waste water, or sewage by oxidation
    • C02F1/74—Treatment of water, waste water, or sewage by oxidation with air
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00—General aspects of water treatment
    • C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00—Specific treatment goals
    • C02F2303/04—Disinfection
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/30—Aerobic and anaerobic processes

Abstract

The invention discloses a sulfur-containing sewage treatment system and a treatment process thereof, and relates to the technical field of sewage treatment, wherein the system comprises an anaerobic generator, an air oxidation processor, a sequencing batch biofilm reactor and a water purification tank which are sequentially connected; the anaerobic generator is provided with a first water inlet for pumping in overhaul wastewater of a natural gas water purification plant; the air oxidation processor is provided with a second water inlet for pumping the production sewage and the domestic sewage. The invention also discloses a treatment process of the sulfur-containing sewage treatment system. The invention adopts the air oxidation processor to replace the aeration tank, thereby greatly saving the occupied area; meanwhile, a sequencing batch biofilm reactor with an activated sludge method and a biofilm method is adopted for denitrification, dephosphorization and desulfurization, ammonia nitrogen, phosphorus and sulfur in the sewage are removed, and the operation cost is reduced; meanwhile, the sequencing batch biofilm reactor also has good impact load resistance and can keep stable treatment capacity.

Description

Sulfur-containing sewage treatment system and treatment process thereof
Technical Field
The invention relates to the technical field of sewage treatment, in particular to a sulfur-containing sewage treatment system and a treatment process thereof.
Background
The sewage treatment process of natural gas purification plants has gradually changed from the physicochemical treatment process commonly used in the past to the biochemical treatment process. The aerobic biochemical section of the traditional process also goes through the development stage from activated sludge aeration → contact oxidation → SBR, and is practically applied to a plurality of natural gas purification plants in Sichuan.
The pollutants in the overhaul wastewater of a natural gas water purification plant mainly comprise a desulfurizing agent methyl glycol amine, a dehydrating agent triethylene glycol, a sulfur recovery inorganic catalyst, and high-salinity formation water (SO) separated from raw material gas4 2-、Cl-) Light hydrocarbon (more than or equal to C)4) Sulfide (S)2-) Various analytical test reagents, boiler and water treatment system reagents. The liquid part of the pollutants discharged from the sewage pipeline mainly comprises a desulfurization solvent, hydrocarbons, hydrogen sulfide, COS, carbon dioxide and water, and the solid part of the pollutants comprises fine rock debris carried by raw material gas, process equipment and corrosion products of the pipeline. The components are complex, the sulfur content is much higher than that of the conventional sewage, the treatment cost is high, and the treatment to the dischargeable standard is difficult.
Disclosure of Invention
The utility model provides a problem that overhauls the sewage treatment degree of difficulty height, treatment effect not good to the natural gas purification plant alone among the prior art is overcome to the aim at of this application, provides a contain sulphur sewage treatment system.
The invention also provides a treatment process of the sulfur-containing sewage treatment system.
In order to achieve the above object, the present application provides the following technical solutions: a sulfur-containing sewage treatment system comprises an anaerobic generator, an air oxidation processor, a sequencing batch biofilm reactor and a water purification tank which are connected in sequence; the anaerobic generator is provided with a first water inlet for pumping in overhaul wastewater of a natural gas water purification plant; the air oxidation processor is provided with a second water inlet for pumping the production sewage and the domestic sewage.
In the technical scheme, the system adopts the air oxidation processor to replace an aeration tank, so that the floor area is greatly saved; meanwhile, a sequencing batch biofilm reactor with an activated sludge method and a biofilm method is adopted for denitrification, dephosphorization and desulfurization, ammonia nitrogen, phosphorus and sulfur in the sewage are removed, and the operation cost is reduced; meanwhile, the sequencing batch biofilm reactor also has good impact load resistance and can keep stable treatment capacity. In addition, in this technical scheme, after the maintenance waste water at natural gas water purification plant earlier through anaerobic treatment ware anaerobic treatment, loop through the air oxidation treater after mixing with domestic sewage and/or production sewage, the biofilm reactor of sequencing batch is handled, pollutant content in the maintenance waste water through domestic sewage and/or production sewage and natural gas water purification plant, reduce the processing degree of difficulty of the maintenance waste water of natural gas water purification plant, improve the effluent quality, reach good maintenance waste water treatment effect of natural gas water purification plant, also can make the maintenance waste water and the domestic sewage/production sewage of natural gas water purification plant adopt same set of sewage treatment system simultaneously, reduce the required sewage treatment system of natural gas water purification plant, reduce the area of sewage treatment cost and the required system of sewage treatment.
Further, a water supply pipeline is arranged between the anaerobic generator and the air oxidation processor; the production sewage and/or the domestic sewage and the overhaul wastewater of the natural gas water purification plant are mixed in the water supply pipeline and then enter the air oxidation processor, so that the production sewage/the domestic sewage entering the air oxidation processor and the overhaul wastewater of the natural gas water purification plant are aerated simultaneously, and the air oxidation effect is improved.
Furthermore, the system is also provided with a sewage tank, and the production sewage and/or the domestic sewage pass through the sewage tank and then are pumped into the air oxidation processor; the sewage tank is provided with a water inlet, the water inlet is provided with an impeller and a sewage filtering device, so that domestic sewage/production sewage enters the sewage tank after being filtered, the flow of the domestic sewage/production sewage is regulated through the sewage tank and then enters the air oxidation processor, and stable treatment of the domestic sewage/production sewage is kept; meanwhile, the problem that solid pollutants in domestic sewage/production sewage cause blockage of a filler fixing tower tray in the air oxidation processor and influence on aeration is also avoided.
The production sewage and/or the domestic sewage enter a sewage filtering device after passing through an impeller; the play water direction of impeller with sewage filter equipment's filter screen surface is tangent or is not more than 60 acute angles, through the rotation of impeller, makes production sewage domestic sewage strike on the filter screen surface along filter screen surface tangent line or slope, makes it clear up the filter screen surface at filterable in-process, avoids great solid pollutant to block up the filter screen, prolongs the life of filter screen, reduces the clearance and the maintenance time of filter screen.
Furthermore, the air oxidation processor comprises a tower body, and a water inlet and distribution device, an air aeration device, a filler fixing tray and a second water outlet which are arranged on the tower body, wherein the water inlet and distribution device, the air aeration device and the filler fixing tray are sequentially arranged in the tower body from bottom to top. The second water inlet of the air oxidation processor is positioned below the tower body and is communicated with the water supply pipeline, so that sewage flows upwards from the lower part of the tower body and is mixed with air filled in the air aeration device, and then oxygen in the air is fully oxidized and reacted with sulfide and ammonia nitrogen in the sewage through the filler fixing tower tray, so that the aeration effect is improved.
Furthermore, a plurality of air aeration devices and a plurality of packing fixed trays are arranged; the plurality of packing fixing tower trays are arranged above the water inlet and distribution device in parallel, and gaps are formed between the adjacent packing fixing tower trays; the air aeration devices are arranged above the water inlet and distribution device in parallel, and the air aeration device at the lowest part is positioned between the water inlet and distribution device and the filler fixing tower tray; the air aeration devices and the packing fixed trays are alternately arranged.
Further, the system also comprises a wastewater regulating tank communicated with the anaerobic generator; the natural gas water purification plant's maintenance waste water process waste water adjusting tank adjusts the back and enters anaerobic generator, makes into the water quality of water stable, avoids the water quality of intaking to fluctuate and causes the water quality of being qualified for the next round of competitions unstable, increases the load of system.
Furthermore, the system also comprises a sludge treatment mechanism communicated with the sequencing batch biofilm reactor, and the sludge treatment mechanism is used for treating sludge generated in the system and avoiding secondary pollution caused by sludge discharge.
Further, the sludge treatment mechanism comprises an air floatation treatment device, a sludge settling tank and a filter pressing device which are sequentially communicated, and the air floatation treatment device is communicated with a sludge outlet of the sequencing batch biofilm reactor; the air floatation treatment device is provided with a drain outlet and a water outlet overflow port, the drain outlet is connected with the sludge settling tank, and the water outlet overflow port is communicated with the clean water tank.
The invention also discloses a treatment process of the sulfur-containing sewage treatment system, by adopting the system, the overhaul wastewater of the natural gas water purification plant is pumped into the anaerobic generator, is subjected to anaerobic treatment, is mixed with domestic sewage and/or production sewage, then sequentially undergoes oxidation treatment by the air oxidation processor and denitrification and desulfurization by the sequencing batch biofilm reactor, enters the water purification tank, and is discharged after water purification and disinfection.
Furthermore, the hydraulic retention time in the sequencing batch biofilm reactor is 6 hours, and the concentration of dissolved oxygen in the sequencing batch biofilm reactor is 2 mg/L-5 mg/L.
Compared with the prior art, the invention has the following beneficial effects:
the application discloses a sulfur-containing sewage treatment system, which adopts an air oxidation processor to replace an aeration tank, thereby greatly saving the occupied area; meanwhile, a sequencing batch biofilm reactor with an activated sludge method and a biofilm method is adopted for denitrification, dephosphorization and desulfurization, ammonia nitrogen, phosphorus and sulfur in the sewage are removed, and the operation cost is reduced; meanwhile, the sequencing batch biofilm reactor also has good impact load resistance and can keep stable treatment capacity. Meanwhile, a large amount of sulfur compound-containing wastewater and desulfurization and dehydration medicament wastewater are remained in the equipment system of the natural gas purification plant during shutdown and overhaul. Through setting up front end anaerobic reaction pond, can cultivate the thiobacillus denitrificans, carry out synchronous denitrification denitrogenation and sulphur removal to can get rid of sulphur compound in a large number. In addition, the system that this application discloses still installs sewage filter equipment additional on the effluent water sump, and the impact force drive impeller through getting into effluent water sump sewage rotates to rotate through the impeller and continuously clear up the filter screen surface, can clear away when great impurity blocks up the filter mesh, the time of extension filter screen clearance reduces the operation volume.
The application discloses processing technology of sulphur sewage treatment system, maintenance waste water at natural gas water purification plant passes through anaerobic treatment ware anaerobic treatment earlier after, loop through the air oxidation treater after mixing with domestic sewage and/or production sewage again, the treatment of sequencing batch biofilm reactor, pollutant content in the maintenance waste water through domestic sewage and/or production sewage with the natural gas water purification plant, reduce the treatment degree of difficulty of the maintenance waste water of natural gas water purification plant, improve the effluent quality, reach good maintenance waste water treatment effect of natural gas water purification plant, also can make the maintenance waste water and the domestic sewage/production sewage of natural gas water purification plant adopt same set of sewage treatment system simultaneously, reduce the required sewage treatment system of natural gas water purification plant, reduce the area of sewage treatment cost and the required system of sewage treatment. .
Drawings
FIG. 1 is a schematic illustration of the configuration of a sour water treatment system as disclosed in some embodiments of the invention;
FIG. 2 is a schematic illustration of a treatment process of a sour water treatment system as disclosed in some embodiments of the invention;
the system comprises a wastewater adjusting tank 1, an anaerobic generator 2, a sewage tank 3, an air oxidation processor 4, a sequencing batch biofilm reactor 5, a clean water tank 6, an air floatation processing device 7, a sludge settling tank 8, a filter pressing device 9 and a water pump 10.
Detailed Description
The present invention will be described in further detail with reference to test examples and specific embodiments. It should be understood that the scope of the above-described subject matter is not limited to the following examples, and any techniques implemented based on the disclosure of the present invention are within the scope of the present invention.
The pollutants in the overhaul wastewater of a natural gas water purification plant mainly comprise a desulfurizing agent methyl glycol amine, a dehydrating agent triethylene glycol, a sulfur recovery inorganic catalyst, and high-salinity formation water (SO) separated from raw material gas4 2-Cl-), light hydrocarbons (more than or equal to C)4) Sulfide (S)2-) Various analytical test reagents, boiler and water treatment system reagents. The liquid part of the pollutants discharged from the sewage pipeline mainly comprises a desulfurization solvent, hydrocarbons, hydrogen sulfide, COS, carbon dioxide and water, and the solid part of the pollutants comprises fine rock debris carried by raw material gas, process equipment and corrosion products of the pipeline. Therefore, the overhaul wastewater of the natural gas water purification plant has complex components and much higher sulfur content compared with the conventional wastewater, and is treated by the conventional wastewater treatment system and method, so that the treatment cost is high and the wastewater cannot be treated to the discharge standard easily.
In order to solve the above problems, the inventors provide a sulfur-containing sewage treatment system, referring to fig. 1, comprising an anaerobic generator 2, an air oxidation processor 4, a sequencing batch biofilm reactor 5, and a clean water tank 6, which are connected in sequence; the anaerobic generator 2 is provided with a first water inlet for pumping in overhaul wastewater of a natural gas water purification plant through a water pump 10; the air oxidation processor 4 is provided with a second water inlet for pumping the production sewage and the domestic sewage into the water pump 10.
It should be noted that the anaerobic generator 2, the sequencing batch biofilm reactor 5, and the water pump 10 used in this document are all commercially available devices, and those skilled in the art can purchase the devices commercially.
In some embodiments, a water supply pipeline is provided between the anaerobic generator 2 and the air oxidation processor 4; the production sewage and/or the domestic sewage and the overhaul wastewater of the natural gas water purification plant are mixed in the water supply pipeline and then enter the air oxidation processor 4, so that the production sewage/the domestic sewage entering the air oxidation processor 4 and the overhaul wastewater of the natural gas water purification plant are aerated simultaneously, and the air oxidation effect is improved.
In some embodiments, the air oxidation processor 4 comprises a tower body, and a water inlet and distribution device, an air aeration device, a filler fixing tray and a second water outlet arranged on the tower body, which are arranged in the tower body from bottom to top in sequence. And a second water inlet of the air oxidation processor 4 is positioned below the tower body and is communicated with the water supply pipeline, so that the sewage flows upwards from the lower part of the tower body and is mixed with the air filled in the air aeration device, and then the oxygen in the air is fully oxidized and reacted with sulfide and ammonia nitrogen in the sewage through the filler fixing tower tray, so that the aeration effect is improved.
In some embodiments, the air aeration device and the packing fixture tray are each provided in plurality; the plurality of packing fixing tower trays are arranged above the water inlet and distribution device in parallel, and gaps are formed between the adjacent packing fixing tower trays; the air aeration devices are arranged above the water inlet and distribution device in parallel, and the air aeration device at the lowest part is positioned between the water inlet and distribution device and the filler fixing tower tray; the air aeration devices and the packing fixed trays are alternately arranged.
It should be noted that the air oxidation processor 4 is further provided with an air inlet pipeline and a plurality of air inlets, one end of the air inlet pipeline is connected with an air compressor or an air pump, and the other end of the air inlet pipeline is connected with the air inlets and supplies air to the plurality of air aeration devices through the air inlets.
In some embodiments, the air aeration device can adopt a ring-shaped aeration pipe or an S-shaped aeration pipe, and a plurality of aeration micropores are uniformly arranged on the aeration pipe to realize uniform aeration.
In some embodiments, the system is further provided with a sewage tank 3, and the production sewage and/or the domestic sewage are pumped into the air oxidation processor 4 after passing through the sewage tank 3; the sewage tank 3 is provided with a water inlet, the water inlet is provided with an impeller and a sewage filtering device, so that domestic sewage/production sewage enters the sewage tank 3 after being filtered, and then enters the air oxidation processor 4 after the flow regulation is carried out on the sewage tank 3, and the stable treatment of the production sewage/the domestic sewage is kept; meanwhile, the solid pollutants in the domestic sewage/production sewage are prevented from causing the blockage of the filler fixing tower tray in the air oxidation processor 4 and influencing the aeration.
The production sewage and/or the domestic sewage enter a sewage filtering device after passing through an impeller; the play water direction of impeller with sewage filter equipment's filter screen surface is tangent or is not more than 60 acute angles, through the rotation of impeller, makes production sewage domestic sewage strike on the filter screen surface along filter screen surface tangent line or slope, makes it clear up the filter screen surface at filterable in-process, avoids great solid pollutant to block up the filter screen, prolongs the life of filter screen, reduces the clearance and the maintenance time of filter screen.
In some embodiments, the system further comprises a wastewater conditioning tank 1 in communication with the anaerobic generator 2; the overhaul waste water of natural gas water purification plant passes through entering anaerobic generator 2 after waste water equalizing basin 1 is adjusted, makes into the stable quality of water, avoids the quality of water fluctuation of intaking to cause the effluent quality unstable, increases the load of system.
Preferably, the wastewater adjusting tank 1 is of a buried structure of a reinforced concrete structure, and the top of the wastewater adjusting tank is covered with soil of at least 250 mm; each waste water equalizing basin 1 divides 2 check, and sets up the return bend breather pipe.
In some embodiments, the system further comprises a sludge treatment mechanism communicated with the sequencing batch biofilm reactor 5 and used for treating sludge generated in the system and avoiding secondary pollution caused by sludge discharge.
In some embodiments, the sludge treatment mechanism comprises an air floatation treatment device 7, a sludge settling tank 8 and a pressure filtration device 9 which are sequentially communicated, wherein the air floatation treatment device 7 is communicated with a sludge outlet of the sequencing batch biofilm reactor 5; the air floatation treatment device 7 is provided with a drain outlet and a water outlet overflow port, the drain outlet is connected with the sludge settling tank 8, and the water outlet overflow port is communicated with the clean water tank 6.
Preferably, the sludge settling tank 8 is a gravity type sludge settling tank 8 with a reinforced concrete structure, the sludge retention time is preferably 12 hours, supernatant liquid flows back to the wastewater adjusting tank 1, the concentrated sludge enters a horizontal screw type dehydrator, and the sludge is transported outside after dehydration treatment.
The treatment process of the sulfur-containing sewage treatment system comprises the following steps: and pumping the overhaul wastewater of the natural gas water purification plant into the anaerobic generator 2, mixing the overhaul wastewater with domestic sewage and/or production sewage after anaerobic treatment, sequentially performing oxidation treatment by the air oxidation processor 4 and denitrification and desulfurization by the sequencing batch biofilm reactor 5, then entering the water purification tank 6, and discharging the purified water after water purification and disinfection.
Referring to fig. 2, the method specifically includes the following steps:
s1) discharging all the wastewater generated by the maintenance into a wastewater adjusting tank 1, after stabilizing the water, discharging the maintenance wastewater into an anaerobic generator 2, and removing most of nitrogen and sulfur and removing a large amount of sulfur-containing compounds in the anaerobic generator 2.
S2) collecting the production and domestic sewage into the sewage tank 3 to stabilize the water quality. The overhaul wastewater subjected to front-end anaerobic treatment in the anaerobic generator 2 is mixed with the production and domestic wastewater in the sewage tank 3 and then enters the air oxidation processor 4 through a pump. The sulfur-containing wastewater enters the water inlet and distribution device and is uniformly distributed in the tower body, and the wastewater is fully mixed with air through the air aeration device in the rising process and enters the filler of the filler fixed tray for full reaction. The huge surface area between the fillers promotes the fusion between air and water molecules, which is beneficial to the diffusion of oxygen in the air to water and accelerates the oxidation speed. Finally, the sulfide in the water is fully reacted with oxygen in the filler to be converted into non-toxic thiosulfate or sulfate.
Compared with the existing equipment, the whole reaction process saves 25-30%, and improves the desulfurization efficiency.
S3), after the sewage subjected to oxidation reaction enters a sequencing batch biofilm reactor 5, the reaction period of the sequencing batch biofilm reactor 5 is 6 hours, wherein water is fed and aerated for 2 hours, single aeration is carried out for 1.5 hours, sedimentation is carried out for 1.5 hours, and water is drained for 1 hour. When the periodic water quantity and the water quality load change greatly, the periodic time and the operation time of each section can be adjusted according to the actual operation effect.
S4) the treated wastewater discharged from the sequencing batch biofilm reactor 5 enters a clean water basin 6 for disinfection, and after the disinfection is finished, water resources are recycled.
S6) the sludge periodically discharged from the sequencing batch biofilm reactor 5 enters an air floatation treatment device 7, the sludge is separated and then enters a sludge sedimentation tank 8, the sludge is dewatered by a filter pressing device 9 after sedimentation is finished, and the treated sludge cake is transported out for recycling treatment.
In some embodiments, the sequencing batchDissolved oxygen in the biomembrane reactor 5 is 2 mg/L-5 mg/L, and the volume load is optimally 0.4kg COD/(m)3D), MLSS is optimally employed at 2000 mg/L. Arranging high-efficiency combined filler in the reaction tank, performing blast aeration, optimally adopting a ratio of air to water of 20: 1, and adopting a carbamic acid polymer microporous rubber membrane aeration head; the rotary water decanter is used for draining water in the sequencing batch biofilm reactor 5, and the optimal water discharge load of the effluent weir is 10L/(m.s).
The preferred embodiments of the present invention have been described in detail, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims (10)

1. A sulfur-containing sewage treatment system is characterized by comprising an anaerobic generator, an air oxidation processor, a sequencing batch biofilm reactor and a clean water tank which are connected in sequence; the anaerobic generator is provided with a first water inlet for pumping in overhaul wastewater of a natural gas water purification plant; the air oxidation processor is provided with a second water inlet for pumping the production sewage and the domestic sewage.
2. The sulfur-containing wastewater treatment system according to claim 1, wherein a water supply pipeline is provided between said anaerobic generator and said air oxidation processor; and the production sewage and/or the domestic sewage are mixed with the overhaul wastewater of the natural gas water purification plant in the water supply pipeline and then enter the air oxidation processor.
3. The sulfur-containing wastewater treatment system according to claim 1, wherein a wastewater tank is further provided, and the production wastewater and/or the domestic wastewater is pumped into the air oxidation treatment unit after passing through the wastewater tank;
the sewage tank is provided with a water inlet, and the water inlet is provided with an impeller and a sewage filtering device; the production sewage and/or the domestic sewage enter a sewage filtering device after passing through an impeller; the water outlet direction of the impeller is tangential to the surface of a filter screen of the sewage filtering device or forms an acute angle not greater than 60 degrees.
4. The sulfur-containing sewage treatment system of claim 1, wherein the air oxidation processor comprises a tower body, and a water inlet and distribution device, an air aeration device, a filler fixing tray and a second water outlet arranged on the tower body, which are arranged in the tower body from bottom to top in sequence.
5. The sulfur-containing wastewater treatment system according to claim 4, wherein a plurality of air aeration devices and filler-fixed trays are provided;
the plurality of packing fixing tower trays are arranged above the water inlet and distribution device in parallel, and gaps are formed between the adjacent packing fixing tower trays;
the air aeration devices are arranged above the water inlet and distribution device in parallel, and the air aeration device at the lowest part is positioned between the water inlet and distribution device and the filler fixing tower tray; the air aeration devices and the packing fixed trays are alternately arranged.
6. The sulfur-containing wastewater treatment system of claim 1, further comprising a wastewater conditioning tank in communication with said anaerobic generator; and the overhaul wastewater of the natural gas water purification plant enters the anaerobic generator after being regulated by the wastewater regulating tank.
7. The sulfur-containing wastewater treatment system of claim 1, further comprising a sludge treatment mechanism in communication with the sequencing batch biofilm reactor.
8. The sulfur-containing sewage treatment system of claim 7, wherein the sludge treatment mechanism comprises an air flotation treatment device, a sludge settling tank and a pressure filtration device which are sequentially communicated, and the air flotation treatment device is communicated with a sludge outlet of the sequencing batch biofilm reactor;
the air floatation treatment device is provided with a drain outlet and a water outlet overflow port, the drain outlet is connected with the sludge settling tank, and the water outlet overflow port is communicated with the clean water tank.
9. A treatment process of a sulfur-containing sewage treatment system is characterized in that the system of any one of claims 1 to 8 is adopted, overhaul wastewater of a natural gas water purification plant is pumped into the anaerobic generator, is subjected to anaerobic treatment, is mixed with domestic sewage and/or production sewage, sequentially undergoes oxidation treatment by an air oxidation processor and denitrification and desulfurization by a sequencing batch biofilm reactor, enters a water purification tank, and is discharged after water purification and disinfection.
10. The process of claim 9, wherein the hydraulic retention time in the sequencing batch biofilm reactor is 6 hours and the concentration of dissolved oxygen in the sequencing batch biofilm reactor is 2mg/L to 5 mg/L.
CN202110330689.4A 2021-03-26 2021-03-26 Sulfur-containing sewage treatment system and treatment process thereof Pending CN113087290A (en)

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