CN106396301B - Oil field sewage station adds little biological treatment device - Google Patents
Oil field sewage station adds little biological treatment device Download PDFInfo
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- CN106396301B CN106396301B CN201611145240.6A CN201611145240A CN106396301B CN 106396301 B CN106396301 B CN 106396301B CN 201611145240 A CN201611145240 A CN 201611145240A CN 106396301 B CN106396301 B CN 106396301B
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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
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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
- C02F1/24—Treatment of water, waste water, or sewage by flotation
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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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
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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
- C02F2103/10—Nature of the water, waste water, sewage or sludge to be treated from quarries or from mining activities
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
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Abstract
A microbe treating apparatus for sewage station in oil field is composed of air floating treatment segment, air floating and microbe purifying treatment segment, microbe strengthening treatment segment, solid-liquid separation treatment segment, and intermediate water pool, and is composed of dirty oil recovering system, sludge recovering system, dissolved air supply system, and microbe oxygen supply system. According to the operation condition of original facilities in a station, on the premise of utilizing the original equipment as much as possible, the occupied area is reduced, a process is newly built at the front section of a filter tank to carry out biological strengthening treatment, the process facilities are as close to the flow of the original process equipment as possible, and under the condition of high polymer-containing sewage quality, the quality of water before filtration is ensured to reach or even exceed the design index, so that the final effluent is ensured to continuously and stably reach the standard, the load of a filtration section is fundamentally lightened, and the purpose that the combination of polymer flooding produced sewage and the existing advanced treatment process reaches the water quality index of a medium-low permeable layer is realized.
Description
The technical field is as follows:
the invention aims at the technical field of oilfield sewage treatment. In particular to a microorganism adding treatment device for an oil field sewage station.
Background art:
with the development of oil fields, polymer flooding oil recovery technology has become one of the main measures for improving the crude oil recovery rate of oil fields. However, polymer flooding oil recovery increases the crude oil recovery rate, and increases the difficulty of oil-water separation of produced water, which is specifically represented as follows: the viscosity of the produced water increases; the oil droplets in the produced water become small; the water film strength of the oil-water interface is increased; the ability of the oil droplets to coalesce into large oil droplets is reduced; the water quality complication phenomenon is aggravated; the difficulty of removing oil and suspended matters in water is increased. The ternary composite flooding oilfield oil extraction wastewater comprises the following components: the viscosity is increased, the oil drop in water is reduced, the water film strength at the oil-water interface is increased, the capability of the oil drop to be combined into large oil drops is reduced, the water quality complication phenomenon is aggravated, the difficulty of removing oil and suspended matters in water is increased, and the like.
The polymer flooding oilfield oil extraction wastewater contains a large amount of polymer (polyacrylamide) and surfactant, the treatment difficulty is much higher than that of water flooding produced water, and the oil-water separation difficulty is increased. The emulsification phenomenon of oil drops in water is serious under the condition that the water quality of incoming water contains polymer, the sewage is in an extremely stable state, the ideal effect is difficult to achieve by a conventional physical method, and meanwhile, the problems of large floor area, long treatment process and the like exist.
The invention content is as follows:
in order to overcome the defects in the background art, the invention aims to provide a microbial treatment process for an oil field sewage station, which can ensure the normal operation of the existing polymer flooding sewage treatment system, reduce the mutual allocation engineering quantity of different water qualities and different regions of the sewage system, relieve the problem of insufficient water source of water flooding depth of an oil field, simplify the production and injection balance of the sewage system, and avoid the discharge of sewage and the like. According to the operation condition of original facilities in a station, under the premise of utilizing the original equipment as much as possible, a process is newly built at the front section of a filter tank for biological strengthening treatment, the process facilities are as close to the flow of the original process equipment as possible, and under the condition of high polymer-containing sewage quality, the water quality before filtration is ensured to reach or even exceed the design index, so that the final effluent is ensured to continuously and stably reach the standard, the load of a filtration section is fundamentally lightened, and the combination of polymer flooding produced sewage and the existing advanced treatment process is realized to reach the water quality index of a medium-low permeable layer.
The technical scheme adopted by the invention is as follows: this oil field sewage station adds microbiological treatment device, its characterized in that: the device comprises an air floatation treatment device, an air floatation and microbial purification treatment device, a microbial strengthening treatment device, a solid-liquid separation treatment device, an intermediate water tank, a sludge recovery system and a microbial oxygen supply system; the air flotation treatment device, the air flotation and microbial purification treatment device, the microbial strengthening treatment device, the solid-liquid separation treatment device and the intermediate water tank are sequentially connected through pipelines, the upper parts of the air flotation treatment device, the air flotation and microbial purification treatment device and the microbial strengthening treatment device are respectively provided with an oil collecting device, each oil collecting device is connected with a waste oil tank through a pipeline, the outlet end of the waste oil tank is connected with a group of waste oil pumps, and the air flotation and microbial purification treatment device and the microbial strengthening treatment device are respectively communicated with a microbial oxygen supply system.
The air floatation treatment device comprises a dissolved air purification tank, wherein a mud scraping system is arranged at the bottom of the dissolved air purification tank and is communicated with a recovered sludge tank, a central cylinder is arranged in the center of the dissolved air purification tank along the axial direction, a sleeve is arranged outside the central cylinder, the upper part of the central cylinder is divided into a water inlet area and a water collecting area by a partition plate, the water inlet area is communicated with a water outlet pipe, a water outlet nozzle is arranged at the lower part of the central cylinder of the water inlet area, a dissolved air releaser is correspondingly arranged on the central cylinder below the water outlet nozzle and is connected with the outlet end of a dissolved air tank through a pipeline, the inlet end of the dissolved air tank is connected with a group of dissolved air pumps, the other inlet end of the dissolved air tank is sequentially connected with a dry cooling machine, an air storage tank and an oxygen supply machine, the upper part of the water collecting area is communicated with a water outlet pipe, the tail end of the water outlet pipe is communicated with a regulation and control water tank, and the lower part of the water collecting area is communicated with a water collecting tray;
the air flotation and microbial purification treatment device comprises a dissolved air biological purification tank, wherein a mud scraping system is arranged at the bottom of the dissolved air biological purification tank and communicated with a recovered sludge tank, a central cylinder A is arranged in the center of the dissolved air biological purification tank along the axial direction, a sleeve A is arranged outside the central cylinder A, a reaction cylinder with a conical bottom is arranged at the upper part of the outer wall of the sleeve A, the upper end surface of the reaction cylinder is higher than the upper end surface of the sleeve A, the upper part of the central cylinder A is divided into a water inlet area A and a water collecting area A by a partition plate, the water inlet area A is communicated with a water outlet pipe A, a water outlet nozzle A is arranged at the lower part of the central cylinder A of the water inlet area A, a dissolved air releaser A is correspondingly arranged on the central cylinder A below the water outlet nozzle A and connected with the outlet end of the dissolved air tank A through a pipeline, the inlet end of the dissolved air tank A is connected with a group of dissolved air pumps, the other inlet end of the dissolved air tank A is sequentially connected with a dry cooling machine, an air storage tank and an oxygen supply machine, the upper part of the water collecting area A is communicated with a water outlet pipe A, the tail end of the water outlet pipe A is communicated with a regulation water collection tray A; a filler bracket is arranged in the sleeve A and the dissolved air biological purification tank outside the reaction cylinder, a filler is arranged on the filler bracket, and strains are attached to the filler;
the microorganism strengthening treatment device comprises a biological strengthening treatment tank, wherein a sludge scraping system is arranged at the bottom of the biological strengthening treatment tank and is communicated with a sludge recovery tank, a central cylinder B is arranged in the center of the biological strengthening treatment tank along the axial direction, the lower part of the central cylinder B is divided into a water inlet area B by a partition plate, a water outlet nozzle B is arranged at the lower part of the central cylinder B of the water inlet area B, the water inlet area B is communicated with a water outlet pipe B, a water outlet pipe B is arranged in the upper part of the biological strengthening treatment tank, the inlet end of the water outlet pipe B is communicated with a plurality of water collecting discs B, the outlet end of the water outlet pipe B is communicated with a regulating water tank B, a filler support is arranged in the biological strengthening treatment tank between the water outlet pipe B and the water outlet pipe B, a filler B is arranged on the filler support B, and strains are attached to the filler B; the microorganism oxygen supply system consists of an oxygen supply fan, a cooling water pump, a cooling tower and a cooling water tank.
Solid-liquid separation processing apparatus include the box, the box up end is equipped with the apron, be equipped with grid frame in the box, upper portion is equipped with the oil collecting device in the box, the box lateral wall is equipped with the sewage import, the bottom half is equipped with the mud discharging port, the middle part is equipped with the stuffing box in the box, there is the filler in the stuffing box, one side of stuffing box is equipped with the baffling baffle, the opposite side of stuffing box is equipped with the releaser subassembly, be equipped with the water purification export on the box wall of baffling baffle below, the releaser subassembly with dissolve the gas pitcher intercommunication, it is connected with the dissolved air pump to dissolve the gas pitcher, water purification export and middle pond intercommunication, the elevator pump is connected to the exit end in middle pond, the buffering water pitcher is connected to the exit end of elevator pump, the entry end of sludge pump is connected to the mud discharging port, the exit end and the recovery sludge impoundment pond of sludge pump are linked together.
The regulation and control water tank among the above-mentioned scheme is equipped with delivery port and backward flow mouth including regulation and control water tank body side by side in the lower part of regulation and control water tank body, is equipped with intermediate bottom and flashboard in the axial of regulation and control water tank body, and the lifting screw is connected to the flashboard upper end, and the lifting screw is driven by electric adjusting device, installs manual regulation wheel on the electric adjusting device, and regulation and control water tank body up end is equipped with the access hole.
The beneficial effects adopted by the invention are as follows: the main process of the invention is divided into an air-floating treatment process section, an air-floating and microbial purification treatment process section, a microbial enhanced treatment process section, a solid-liquid separation treatment process section and an intermediate water tank, and is provided with a dirty oil recovery system, a sludge recovery system, a dissolved air supply system, a microbial oxygen supply system and the like. According to the operation condition of original facilities in a station, under the premise of utilizing original equipment as much as possible, a process at the front section of a filter tank is newly built for carrying out biological strengthening treatment, and under the condition of high polymer-containing sewage quality, the water quality before filtration is ensured to reach or even exceed the design index, so that the final effluent is ensured to continuously and stably reach the standard, the load of a filtration section is fundamentally reduced, and the polymer flooding produced sewage and the existing advanced treatment process are combined to reach the water quality index of a medium-low permeable layer.
Description of the drawings:
FIG. 1 is a schematic structural diagram of the present invention.
FIG. 2 is a schematic view of an air floatation treatment apparatus.
FIG. 3 is a schematic view of an air floatation and microorganism purification treatment apparatus.
FIG. 4 is a schematic view of a microorganism enhancement treatment apparatus.
FIG. 5 is a schematic view of the operation of the air floatation treatment device.
FIG. 6 is a schematic view of the working state of the air floatation and microbial purification apparatus.
FIG. 7 is a schematic view showing the operation of the microorganism enrichment treatment apparatus.
Fig. 8 is a schematic structural view of the regulating and controlling water tank in fig. 1.
Fig. 9 is a left side view of fig. 8.
FIG. 10 is a schematic view of a solid-liquid separation treatment apparatus.
Fig. 11 is a schematic view of the grid frame structure of fig. 10.
FIG. 12 is a schematic view of a first process flow of the present invention.
FIG. 13 is a schematic view of a second process of the present invention.
FIG. 14 is a schematic view of a third process flow of the present invention.
The specific implementation mode is as follows:
the device comprises an air floatation treatment device, an air floatation and microorganism purification treatment device, a microorganism strengthening treatment device, a solid-liquid separation treatment device, an intermediate water tank and a microorganism oxygen supply system; the air flotation treatment device, the air flotation and microbial purification treatment device, the microbial strengthening treatment device, the solid-liquid separation treatment device and the intermediate water tank are sequentially connected through pipelines, the upper parts of the air flotation treatment device, the air flotation and microbial purification treatment device and the microbial strengthening treatment device are respectively provided with an oil collecting device, each oil collecting device is connected with a waste oil tank 17 through a pipeline, the outlet end of the waste oil tank 17 is connected with a group of waste oil pumps 18, and the air flotation and microbial purification treatment device and the microbial strengthening treatment device are respectively communicated with a microbial oxygen supply system.
The air-flotation treatment device firstly carries out settlement air-flotation oil-receiving treatment on sewage, and is divided into a contact zone, a separation zone, a water outlet zone and an oil-receiving zone, the air-flotation treatment device comprises a dissolved air purification tank 1, the bottom of the dissolved air purification tank 1 is provided with a mud scraping system which is communicated with a recovered sludge tank 28, the sludge precipitated in the dissolved air purification tank 1 is conveyed to the recovered sludge tank 28 by the mud scraping system for recovery, the center of the dissolved air purification tank 1 is provided with a center cylinder 2 along the axial direction, the outside of the center cylinder 2 is provided with a sleeve 3, the center cylinder 2 utilizes a baffle plate to separate the upper part into a water inlet zone 7 and the lower part into a water collecting zone 9, the water inlet zone 7 is communicated with a water outlet pipe 8, the water outlet pipe 8 is arranged vertical to the axial direction of the center cylinder 2, each water outlet pipe 8 is divided into two small water outlet pipes and the outlet pipes are downward, compared with the existing single water outlet, the incoming water can be more fully contacted with the released water of the dissolved air, the contact area is increased by dozens of times, which is more beneficial to the contact between bubbles in the dissolved air release water and sump oil to be beneficial to oil removal and sludge sedimentation, the water outlet direction of the water inlet pipe 8 is opposite to the dissolved air releaser 5, the water distribution form of the water inlet pipe 8 is that the incoming water is sprayed downwards, the dissolved air releaser 5 is in an upward release form, thus the incoming water and the dissolved air water are released upwards to form turbulence to achieve full mixing, the lower part of the central cylinder 2 of the water inlet area 7 is provided with the water outlet nozzle 4, the central cylinder 2 below the water outlet nozzle 4 is correspondingly provided with the dissolved air releaser 5, the dissolved air water released by the dissolved air releaser 5 and the sewage discharged by the water inlet pipe 8 form convection, the separated oil overflows from the upper end of the sleeve 3 after being fully contacted in the sleeve 3 and is separated in the dissolved air purification tank 1, and the separated oil is collected to the sump oil tank 17 by an oil scraping system at the upper part in the dissolved air purification tank 1, and then discharged outside by a sump oil pump 18. Dissolve gas releaser 5 and dissolve gas pitcher B19's exit end through the pipe connection, the entry end that dissolves gas pitcher B19 connects a set of air dissolving pump 20, dissolve gas pitcher B19 and dissolve air dissolving pump 20 and dissolve the air water for dissolving providing in the gas purification jar 1, dissolve another entry end of gas pitcher B19 and connect gradually and do the cold machine 22, gas holder 21 and oxygen supplier 23, do cold machine 22, gas holder 21 and oxygen supplier 23 are for dissolving providing gas in the gas pitcher B19, 9 upper portion intercommunications of catchment area have outlet pipe 10, 10 terminal intercommunications of outlet pipe have regulation and control water tank 11, 9 lower parts intercommunications of catchment area have water-collecting tray 6. The water collecting tray 6 collects the separated and settled water into a water collecting area 9 and then conveys the water to a regulating and controlling water tank 11 through a water outlet pipe 10. The residence time of the air flotation zone of the dissolved air purification tank is about 0.5 hour, and the residence time of the settling zone is about 3 hours. The air floating area firstly carries out dissolved air floating to recover oil, about 90 percent of dirty oil in the water is recovered, and the effluent is stably settled and degassed in the settling area. Compared with the prior art, the sewage is settled and then subjected to air floatation in the prior art, part of dirty oil is recovered by a settling tank and then treated by air floatation, and the air floatation load is relatively reduced, so that the adopted air floatation area is smaller, and the surface load is smaller than the conventional specified air floatation parameters. Raw water of the dissolved air purifier is subjected to air floatation treatment, air floatation plays a main dirty oil removing role, the surface area of an air floatation area is larger than the combined air floatation area of the prior art, the retention time is about 25min, the reflux ratio is 20-30%, and the air-water ratio is 1:25 to 50, and the treatment effect is better.
The air-floating and microorganism purification treatment device is used for further treating the sewage treated by the air-floating treatment device and comprises a dissolved air biological purification tank 12, the bottom of the dissolved air biological purification tank 12 is provided with a mud scraping system which is communicated with a recovered sludge tank 28, the sludge settled in the dissolved air biological purification tank 12 is conveyed to the recovered sludge tank 28 by the mud scraping system at the bottom of the dissolved air biological purification tank 12, the center of the dissolved air biological purification tank 12 is axially provided with a central cylinder A2-1, the outside of the central cylinder A2-1 is provided with a sleeve A3-1, the upper part of the outer wall of the sleeve A3-1 is provided with a reaction cylinder 15 with a conical bottom, the upper end surface of the reaction cylinder 15 is higher than the upper end surface of the sleeve A3-1, the central cylinder A2-1 utilizes a clapboard to divide the upper part into a water inlet area A7-1 and the lower part into a water collecting area A9-1, the water inlet area A7-1 is communicated with a water inlet pipe A8-1, the lower part of the central cylinder A2-1 of the water inlet area A7-1 is provided with a water outlet nozzle A4-1, the central cylinder A2-1 under the water outlet nozzle A4-1 is correspondingly provided with a dissolved air releaser A5-1, the water inlet pipe A8-1 is vertically arranged with the axial direction of the central cylinder A2-1, each water inlet pipe A8-1 is divided into two small water outlet pipes with downward outlets, compared with the existing single water outlet, a plurality of water outlets can more fully contact the incoming water and the dissolved air released water, the contact area is increased by dozens of times, the contact between bubbles in the dissolved air released water and dirty oil is more favorable for oil removal and sludge settlement, the water outlet direction of the water outlet pipe A8-1 is opposite to that of the dissolved air releaser A5-1, the water distribution form of the water outlet pipe A8-1 is that incoming water is sprayed downwards, and the dissolved air releaser A5-1 is in an upward release form, so that the incoming water and the dissolved air are released upwards to form turbulence, and the incoming water and the dissolved air are fully mixed. Dissolved air releaser A5-1 is through the exit end of pipeline connection dissolved air jar A24, and dissolved air jar A24's entry end connects a set of dissolved air pump, and dissolved air jar A24 and dissolved air pump provide dissolved air water for air supporting and microbial purification processing apparatus. The other inlet end of the dissolved air tank A24 is sequentially connected with a dry cooling machine 22, an air storage tank 21 and an oxygen supply machine 23, the dry cooling machine 22, the air storage tank 21 and the oxygen supply machine 23 provide air for the dissolved air tank A24, the upper part of a water collecting area A9-1 is communicated with a water outlet pipe A10-1, the tail end of the water outlet pipe A10-1 is communicated with a regulation and control water tank A11-1, the lower part of the water collecting area A9-1 is communicated with a water collecting tray A6-1, and separated and degraded water is collected into the water collecting area A9-1 by the water collecting tray A6-1 and is conveyed to the regulation and control water tank A11-1 by the water outlet pipe A10-1; a filler bracket 14 is arranged in the dissolved air biological purification tank 12 outside the sleeve A3-1 and the reaction cylinder 15, a filler 13 is arranged on the filler bracket 14, and strains are attached to the filler 13; the filler allows microbial flora to attach and grow on the upper part of the filler, thereby forming large-scale colonies to degrade pollutants. The residence time of the biological zone is about 3.5h. The microorganisms degrade organic matters in the sewage to reduce the emulsification of the sewage. The biological area packing density is the same as the civil engineering structure biological system, the packing amount is the same, the biological retention time is the same, and because the liquid level is increased, the oxygen transmission efficiency is improved, and the biological treatment effect can completely reach the original biological pond process level. After sewage and water released by dissolved air are fully contacted in the sleeve A3-1, sludge sedimentation is discharged by a sludge discharge system, water and oil overflow from the upper opening of the sleeve A3-1 and enter the reaction cylinder 15, air is introduced into the reaction cylinder 15 for floating separation, the lower part of the reaction cylinder 15 is in a cone frustum shape, sewage with water outlets is arranged on the reaction cylinder 15 and enters a biological treatment area from the reaction cylinder to form an independent air floating area in the large tank, the dissolved air is floated and integrated in the biological treatment large tank to form a closed flow of air floating separation and microbial treatment, not only can an ideal sewage treatment effect be achieved, but also the cost can be saved without independently building an air floating large tank and a microbial treatment tank. The effluent quality of the dissolved air biological purification tank can reach: the oil content of the effluent is less than or equal to 50mg/L.
The microorganism strengthening treatment device is used for carrying out independent organic matter degradation strengthening treatment on sewage treated by the air flotation and microorganism purification treatment device and the air flotation treatment device, the microorganism strengthening treatment device comprises a biological strengthening treatment tank 16, a mud scraping system is arranged at the bottom of the biological strengthening treatment tank 16 and is communicated with a recovered sludge tank 28, sludge settled in the biological strengthening treatment tank 16 is conveyed to the recovered sludge tank 28 through the mud scraping system, a central cylinder B2-2 is arranged in the center of the biological strengthening treatment tank 16 along the axial direction, the lower part of the central cylinder B2-2 is divided into a water inlet area B7-2 by a partition plate, a water outlet nozzle B4-2 is arranged at the lower part of the central cylinder B2-2 of the water inlet area B7-2, the water inlet area B7-2 is communicated with a water inlet pipe B8-2, sewage enters the water inlet area B7-2 from the water inlet pipe B8-2 and is sprayed out from a water outlet nozzle B4-2, a water outlet pipe B10-2 is arranged in the upper part of the biological strengthening treatment tank 16, the inlet end of the water outlet pipe B10-2 is communicated with a plurality of water collecting discs B6-2, the outlet end of the water outlet pipe B10-2 is communicated with a regulation and control water tank B11-2, organic matters in the sewage are degraded by strains and then are collected by the water collecting discs B6-2 to enter the regulation and control water tank B11-2 through the water outlet pipe B10-2, a filler support 14-1 is arranged in the biological strengthening treatment tank 16 between the water inlet pipe B8-2 and the water outlet pipe B10-2, a filler B13-1 is arranged on the filler support B (14-1), and strains are attached to the filler B13-1; the filler allows microbial flora to attach and grow on the upper part of the filler, thereby forming large-scale colonies to degrade pollutants. The residence time of the biological zone is about 3.5h. The effluent quality can reach: oil content is less than or equal to 20mg/L. The microorganisms degrade organic matters in the sewage to reduce the emulsification of the sewage. The packing density of the biological area is the same as that of a civil structure biological system, the packing filling amount is the same, the biological retention time is the same, and the oxygen transfer efficiency is improved due to the increase of the liquid level, and the biological treatment effect can completely reach the original biological pond process level.
The microorganism oxygen supply system consists of an oxygen supply fan 24-1, a cooling water pump 25, a cooling tower 26 and a cooling water tank 27. The microorganism oxygen supply system provides oxygen for the microorganism strengthening treatment device, the air floatation and microorganism purification treatment device for degrading organic matters by the strains.
The solid-liquid separation treatment device consists of a clarification section at the front part and a dissolved gas-water generator in a demulsification deoiling area and at the rear part, the solid-liquid separation treatment device comprises a box body 10-3, a cover plate 1-3 is arranged on the upper end surface of the box body 10-3, a grid frame 2-3 is arranged in the box body 10-3, the grid frame can ensure that the strength of the device is not deformed, a sewage inlet 4-3 is arranged on the side wall of the box body 10-3, a sludge discharge port 11-3 is arranged at the bottom of the box body 10-3, a stuffing box 5-3 is arranged in the demulsification deoiling area at the middle part in the box body 10-3, stuffing is arranged in the stuffing box 5-3, the sewage treated by the microorganism strengthening treatment device enters the box body 10-3 from the sewage inlet 4-3, and the stuffing in the stuffing box firstly adsorbs suspended matters in the sewage, a baffling baffle 7-3 is arranged at one side of a stuffing box 5-3, the baffling baffle 7-3 separates a clarification section from a demulsification oil removal section, a releaser assembly 9-3 is arranged at the other side of the stuffing box 5-3, dissolved air water is released by the releaser assembly 9-3, a purified water outlet 6-3 is arranged on the wall of a box body 10-3 below the baffling baffle 7-3, the releaser assembly 9-3 is communicated with a dissolved air tank 12-3, the dissolved air tank 12-3 is connected with a dissolved air pump, the purified water outlet 6-3 is communicated with a middle water pool 13-3, water treated by the stuffing and the dissolved air water flows into the clarification section from the upper end face of the baffling baffle 7-3 and then is discharged to the middle water pool 13-3 from the purified water outlet 6-3, the outlet end of the middle water pool 13-3 is connected with a lift pump 14-3, the outlet end of the lift pump 14-3 is connected with a buffer water tank, the sludge discharge port 11-3 is connected with the inlet end of the sludge pump 15-3, and the outlet end of the sludge pump 15-3 is communicated with a recovered sludge tank 28.
The regulation and control water tank comprises a regulation and control water tank body 29, a water outlet 30 and a return port 31 are arranged on the lower portion of the regulation and control water tank body 29 side by side, a middle partition plate 32 and a flashboard 37 are axially arranged in the regulation and control water tank body 29, the upper end of the flashboard 37 is connected with a lifting screw 36, the lifting screw 36 is driven by an electric adjusting device 35, a manual adjusting wheel 34 is installed on the electric adjusting device 35, and an access hole 33 is formed in the upper end face of the regulation and control water tank body 29. Through level gauge remote control electric adjusting device 35 (perhaps with manual regulation of manual regulating wheel 34) drive lifting screw 36 and then make flashboard 37 promote or descend, the regulation water tank liquid level makes jar interior liquid level obtain effective control through delivery port 30 and backward flow mouth 31, reaches the control oil collecting layer liquid level, guarantees that oil trap 4 high efficiency work in time arranges the oil slick outward.
This application can have three kinds of process route to adjust according to the above-mentioned device of quality of water condition. The three process routes are respectively as follows:
1. sedimentation air flotation, two-stage biology and solid-liquid separation:
the water is first treated in the air floating treatment device for settling air floating oil recovery, and the dissolved air in the air floating treatment device is supplied with dissolved air from the dissolved air pump, the dissolved air tank and the releaser inside the tank. The sewage enters a biological area of the air flotation and microbial purification treatment device after sedimentation air flotation treatment for primary biochemical degradation (the sewage does not enter the biological area of the air flotation and microbial purification treatment device for air flotation), then automatically flows into the biological enhancement treatment device for biological enhancement degradation, the oxygen supply of the air flotation and microbial purification treatment device and the oxygen supply of the biological enhancement treatment device are uniformly provided by a microbial oxygen supply system, then automatically flows into a solid-liquid separation treatment device for suspended matter separation in water, then enters an intermediate water tank and finally is conveyed to a subsequent filtering device through a lifting pump for advanced treatment.
2. Parallel air flotation twelve-stage biology + solid-liquid separation:
the incoming water respectively enters the air flotation areas of the air flotation treatment device and the air flotation and microbial purification treatment device to carry out sedimentation air flotation oil receiving treatment, and then jointly enters the biological areas of the air flotation and microbial purification treatment device to carry out primary biochemical degradation, and the air flotation and microbial purification treatment device is connected with the dissolved air system and the dissolved air pressurization system. Then automatically flows into a biological strengthening treatment device for biological strengthening degradation, then automatically flows into a solid-liquid separation device for separation of suspended matters in water, then enters an intermediate water tank, and finally is conveyed to a subsequent filtering device through a lifting pump for advanced treatment.
3. Two-stage sedimentation air flotation, two-stage biology and solid-liquid separation:
the method comprises the steps of firstly carrying out sedimentation air-flotation oil-receiving treatment on incoming water through an air-flotation treatment device, then entering an air-flotation zone of an air-flotation and microbial purification treatment device for secondary air-flotation strengthening treatment, then entering a biological zone for primary biochemical degradation, then automatically flowing into a biological strengthening treatment device for biological strengthening degradation, then automatically flowing into a solid-liquid separation device for suspended matter separation in water, then entering an intermediate water tank, and finally conveying to a subsequent filtering device through a lifting pump for advanced treatment.
According to the method, the occupied area is reduced as much as possible, the process is newly built at the front section of the filter tank, the biological strengthening treatment is carried out, and under the condition of high polymer-containing sewage quality, the water quality before filtration is ensured to reach or even be superior to the design index, so that the final effluent is ensured to continuously and stably reach the standard, the load of the filtration section is fundamentally reduced, and the combination of polymer flooding produced sewage and the existing advanced treatment process is realized to reach the water quality index of a medium-low permeable layer.
Claims (2)
1. The utility model provides an oil field sewage station adds microbiological treatment device which characterized in that: the device comprises an air-flotation treatment device, an air-flotation and microbial purification treatment device, a microbial strengthening treatment device, a solid-liquid separation treatment device, an intermediate water tank and a microbial oxygen supply system; the air flotation treatment device, the air flotation and microbial purification treatment device, the microbial strengthening treatment device, the solid-liquid separation treatment device and the intermediate water tank are sequentially connected through pipelines, the upper parts of the air flotation treatment device, the air flotation and microbial purification treatment device and the microbial strengthening treatment device are respectively provided with an oil receiving device, each oil receiving device is connected with a dirty oil tank (17) through a pipeline, the outlet end of the dirty oil tank (17) is connected with a group of dirty oil pumps (18), and the air flotation and microbial purification treatment device and the microbial strengthening treatment device are respectively communicated with a microbial oxygen supply system;
the air floatation treatment device comprises a dissolved air purification tank (1), a mud scraping system is arranged at the bottom of the dissolved air purification tank (1) and communicated with a recovered sludge tank (28), a central cylinder (2) is arranged in the center of the dissolved air purification tank (1) in the axial direction, a sleeve (3) is arranged outside the central cylinder (2), the upper portion of the central cylinder (2) is divided into a water inlet area (7) and a water collecting area (9) by a partition plate, the water inlet area (7) is communicated with a water inlet pipe (8), a water outlet nozzle (4) is arranged at the lower portion of the central cylinder (2) of the water inlet area (7), a dissolved air releaser (5) is correspondingly arranged on the central cylinder (2) below the water outlet nozzle (4), the dissolved air releaser (5) is connected with the outlet end of a dissolved air tank B (19) through a pipeline, the inlet end of the dissolved air tank B (19) is connected with a group of dissolved air pumps (20), the other inlet end of the dissolved air tank B (19) is sequentially connected with a dry cooler (22), an air storage tank (21) and an oxygen supply machine (23), the water collecting area (9) is communicated with a water collecting disc (6) communicated with the water collecting area (9);
the air-flotation and microbial purification treatment device comprises a dissolved air biological purification tank (12), a mud scraping system is arranged at the bottom of the dissolved air biological purification tank (12) and communicated with a recycled sludge tank (28), a central cylinder A (2-1) is arranged at the center of the dissolved air biological purification tank (12) along the axial direction, a sleeve A (3-1) is arranged outside the central cylinder A (2-1), a reaction cylinder (15) with a conical bottom is arranged at the upper part of the outer wall of the sleeve A (3-1), the upper end surface of the reaction cylinder (15) is higher than the upper end surface of the sleeve A (3-1), a water inlet area A (7-1) and the lower part of the central cylinder A (2-1) are separated into a water collection area A (9-1) by a partition plate, the water inlet area A (7-1) is communicated with a water inlet pipe A (8-1), a water outlet nozzle A (4-1) is arranged at the lower part of the central cylinder A (2-1) of the water inlet area A (7-1), a dissolved air pump A (24-5) is arranged on the central cylinder A (2-1) below the water outlet nozzle A (4-1) and connected with a dissolved air pump (24-5) which is connected with a dissolved air tank (24-5) and a dissolved air inlet end of a dissolved air pump (24-1) which is connected with a dissolved air inlet end of a dissolved air tank (24-24A) in sequence, and a dissolved air pump (24-1) connected with a dissolved air tank (24-1) in turn, and a dissolved air pump (24-1) is arranged on the dissolved air pump, and a) which is connected with a dissolved air pump, wherein the dissolved air pump The oxygen supply device comprises an air storage tank (21) and an oxygen supply machine (23), wherein the upper part of a water collecting area A (9-1) is communicated with a water outlet pipe A (10-1), the tail end of the water outlet pipe A (10-1) is communicated with a regulation and control water tank A (11-1), and the lower part of the water collecting area A (9-1) is communicated with a water collecting tray A (6-1); a filler bracket (14) is arranged in the dissolved air biological purification tank (12) outside the sleeve A (3-1) and the reaction cylinder (15), a filler (13) is arranged on the filler bracket (14), and strains are attached to the filler (13);
the microorganism strengthening treatment device comprises a biological strengthening treatment tank (16), a mud scraping system is arranged at the bottom of the biological strengthening treatment tank (16) and is communicated with a recovered sludge tank (28), a central cylinder B (2-2) is arranged in the center of the biological strengthening treatment tank (16) along the axial direction, the lower part of the central cylinder B (2-2) is divided into a water inlet area B (7-2) by a partition plate, a water outlet nozzle B (4-2) is arranged at the lower part of the central cylinder B (2-2) of the water inlet area B (7-2), the water inlet area B (7-2) is communicated with a water inlet pipe B (8-2), a water outlet pipe B (10-2) is arranged in the upper part of the biological strengthening treatment tank (16), the inlet end of the water outlet pipe B (10-2) is communicated with a plurality of water collecting discs B (6-2), the outlet end of the water outlet pipe B (10-2) is communicated with a regulation and control water tank B (11-2), a filler support B (14-1) is arranged in the biological strengthening treatment tank (16) between the water inlet pipe B (8-2) and the filler support B (14-1) and a strain (13-1) is attached to the filler (B (13-1);
the microorganism oxygen supply system consists of an oxygen supply fan (24-1), a cooling water pump (25), a cooling tower (26) and a cooling water tank (27);
the solid-liquid separation treatment device comprises a box body (10-3), a cover plate (1-3) is arranged on the upper end face of the box body (10-3), a grid frame (2-3) is arranged in the box body (10-3), an oil collecting device (3-3) is arranged at the upper portion in the box body (10-3), a sewage inlet (4-3) is arranged on the side wall of the box body (10-3), a sludge discharge port (11-3) is arranged at the bottom of the box body (10-3), a packing box (5-3) is arranged at the middle portion in the box body (10-3), packing is filled in the packing box, a baffling partition plate (7-3) is arranged on one side of the packing box (5-3), a releaser component (9-3) is arranged on the other side of the packing box (5-3), a clean water outlet (6-3) is arranged on the wall of the box body (10-3) below the baffling partition plate (7-3), the releaser component (9-3) is communicated with a dissolved air tank (12-3), the dissolved air tank (12-3) is connected with the dissolved air tank (12-3), a buffer pump (14-3) is connected with a lifting pump (14-14) connected with a water tank, a water tank (3-3) is connected with an air pump and a lifting pump, the sludge discharge port (11-3) is connected with the inlet end of a sludge pump (15-3), and the outlet end of the sludge pump (15-3) is communicated with a recovered sludge tank (28).
2. The oilfield sewage station microbiological treatment device of claim 1, wherein: the regulation and control water tank comprises a regulation and control water tank body (29), a water outlet (30) and a backflow port (31) are arranged on the lower portion of the regulation and control water tank body (29) side by side, an intermediate partition plate (32) and a flashboard (37) are axially arranged in the regulation and control water tank body (29), a lifting screw (36) is connected to the upper end of the flashboard (37), the lifting screw (36) is driven by an electric adjusting device (35), a manual adjusting wheel (34) is installed on the electric adjusting device (35), and an access hole (33) is formed in the upper end face of the regulation and control water tank body (29).
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| CN107100590B (en) * | 2017-06-14 | 2023-03-28 | 大庆市福安石油科技有限公司 | Heatable environment-friendly type dirty oil and sewage recovery processing device applied to oil field |
| CN111018251A (en) * | 2019-12-25 | 2020-04-17 | 大庆油田有限责任公司 | Advanced treatment system and treatment method for chemical flooding oilfield produced water |
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